1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/base/src/nsContentUtils.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,6627 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=8 sts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +/* A namespace class for static layout utilities. */
1.11 +
1.12 +#include "nsContentUtils.h"
1.13 +
1.14 +#include <algorithm>
1.15 +#include <math.h>
1.16 +
1.17 +#include "prprf.h"
1.18 +#include "nsCxPusher.h"
1.19 +#include "DecoderTraits.h"
1.20 +#include "harfbuzz/hb.h"
1.21 +#include "imgICache.h"
1.22 +#include "imgIContainer.h"
1.23 +#include "imgINotificationObserver.h"
1.24 +#include "imgLoader.h"
1.25 +#include "imgRequestProxy.h"
1.26 +#include "jsapi.h"
1.27 +#include "jsfriendapi.h"
1.28 +#include "js/OldDebugAPI.h"
1.29 +#include "js/Value.h"
1.30 +#include "Layers.h"
1.31 +#include "MediaDecoder.h"
1.32 +// nsNPAPIPluginInstance must be included before nsIDocument.h, which is included in mozAutoDocUpdate.h.
1.33 +#include "nsNPAPIPluginInstance.h"
1.34 +#include "mozAutoDocUpdate.h"
1.35 +#include "mozilla/ArrayUtils.h"
1.36 +#include "mozilla/Attributes.h"
1.37 +#include "mozilla/AutoRestore.h"
1.38 +#include "mozilla/Base64.h"
1.39 +#include "mozilla/DebugOnly.h"
1.40 +#include "mozilla/dom/DocumentFragment.h"
1.41 +#include "mozilla/dom/Element.h"
1.42 +#include "mozilla/dom/HTMLMediaElement.h"
1.43 +#include "mozilla/dom/HTMLTemplateElement.h"
1.44 +#include "mozilla/dom/HTMLContentElement.h"
1.45 +#include "mozilla/dom/TextDecoder.h"
1.46 +#include "mozilla/dom/TouchEvent.h"
1.47 +#include "mozilla/dom/ShadowRoot.h"
1.48 +#include "mozilla/EventDispatcher.h"
1.49 +#include "mozilla/EventListenerManager.h"
1.50 +#include "mozilla/EventStateManager.h"
1.51 +#include "mozilla/IMEStateManager.h"
1.52 +#include "mozilla/InternalMutationEvent.h"
1.53 +#include "mozilla/Likely.h"
1.54 +#include "mozilla/MouseEvents.h"
1.55 +#include "mozilla/Preferences.h"
1.56 +#include "mozilla/dom/Selection.h"
1.57 +#include "mozilla/TextEvents.h"
1.58 +#include "nsAString.h"
1.59 +#include "nsAttrName.h"
1.60 +#include "nsAttrValue.h"
1.61 +#include "nsAttrValueInlines.h"
1.62 +#include "nsBindingManager.h"
1.63 +#include "nsCCUncollectableMarker.h"
1.64 +#include "nsChannelPolicy.h"
1.65 +#include "nsCharSeparatedTokenizer.h"
1.66 +#include "nsCOMPtr.h"
1.67 +#include "nsContentCreatorFunctions.h"
1.68 +#include "nsContentDLF.h"
1.69 +#include "nsContentList.h"
1.70 +#include "nsContentPolicyUtils.h"
1.71 +#include "nsCPrefetchService.h"
1.72 +#include "nsCRT.h"
1.73 +#include "nsCycleCollectionParticipant.h"
1.74 +#include "nsCycleCollector.h"
1.75 +#include "nsDataHashtable.h"
1.76 +#include "nsDocShellCID.h"
1.77 +#include "nsDocument.h"
1.78 +#include "nsDOMCID.h"
1.79 +#include "mozilla/dom/DataTransfer.h"
1.80 +#include "nsDOMJSUtils.h"
1.81 +#include "nsDOMMutationObserver.h"
1.82 +#include "nsError.h"
1.83 +#include "nsFocusManager.h"
1.84 +#include "nsGenericHTMLElement.h"
1.85 +#include "nsGenericHTMLFrameElement.h"
1.86 +#include "nsGkAtoms.h"
1.87 +#include "nsHostObjectProtocolHandler.h"
1.88 +#include "nsHtml5Module.h"
1.89 +#include "nsHtml5StringParser.h"
1.90 +#include "nsIAsyncVerifyRedirectCallback.h"
1.91 +#include "nsICategoryManager.h"
1.92 +#include "nsIChannelEventSink.h"
1.93 +#include "nsIChannelPolicy.h"
1.94 +#include "nsIChromeRegistry.h"
1.95 +#include "nsIConsoleService.h"
1.96 +#include "nsIContent.h"
1.97 +#include "nsIContentSecurityPolicy.h"
1.98 +#include "nsIContentSink.h"
1.99 +#include "nsIContentViewer.h"
1.100 +#include "nsIDocShell.h"
1.101 +#include "nsIDocument.h"
1.102 +#include "nsIDocumentEncoder.h"
1.103 +#include "nsIDOMDocument.h"
1.104 +#include "nsIDOMDocumentType.h"
1.105 +#include "nsIDOMEvent.h"
1.106 +#include "nsIDOMHTMLElement.h"
1.107 +#include "nsIDOMHTMLFormElement.h"
1.108 +#include "nsIDOMHTMLInputElement.h"
1.109 +#include "nsIDOMNode.h"
1.110 +#include "nsIDOMNodeList.h"
1.111 +#include "nsIDOMScriptObjectFactory.h"
1.112 +#include "nsIDOMUserDataHandler.h"
1.113 +#include "nsIDOMXULCommandEvent.h"
1.114 +#include "nsIDragService.h"
1.115 +#include "nsIEditor.h"
1.116 +#include "nsIFormControl.h"
1.117 +#include "nsIForm.h"
1.118 +#include "nsIFragmentContentSink.h"
1.119 +#include "nsIFrame.h"
1.120 +#include "nsIHTMLDocument.h"
1.121 +#include "nsIIdleService.h"
1.122 +#include "nsIImageLoadingContent.h"
1.123 +#include "nsIInterfaceRequestor.h"
1.124 +#include "nsIInterfaceRequestorUtils.h"
1.125 +#include "nsIIOService.h"
1.126 +#include "nsIJSRuntimeService.h"
1.127 +#include "nsILineBreaker.h"
1.128 +#include "nsILoadContext.h"
1.129 +#include "nsILoadGroup.h"
1.130 +#include "nsIMemoryReporter.h"
1.131 +#include "nsIMIMEService.h"
1.132 +#include "nsINode.h"
1.133 +#include "nsINodeInfo.h"
1.134 +#include "nsIObjectLoadingContent.h"
1.135 +#include "nsIObserver.h"
1.136 +#include "nsIObserverService.h"
1.137 +#include "nsIOfflineCacheUpdate.h"
1.138 +#include "nsIParser.h"
1.139 +#include "nsIParserService.h"
1.140 +#include "nsIPermissionManager.h"
1.141 +#include "nsIPluginHost.h"
1.142 +#include "nsIRunnable.h"
1.143 +#include "nsIScriptContext.h"
1.144 +#include "nsIScriptError.h"
1.145 +#include "nsIScriptGlobalObject.h"
1.146 +#include "nsIScriptObjectPrincipal.h"
1.147 +#include "nsIScriptSecurityManager.h"
1.148 +#include "nsIStringBundle.h"
1.149 +#include "nsIURI.h"
1.150 +#include "nsIURL.h"
1.151 +#include "nsIWebNavigation.h"
1.152 +#include "nsIWordBreaker.h"
1.153 +#include "nsIXPConnect.h"
1.154 +#include "nsJSUtils.h"
1.155 +#include "nsLWBrkCIID.h"
1.156 +#include "nsNetCID.h"
1.157 +#include "nsNetUtil.h"
1.158 +#include "nsNodeInfoManager.h"
1.159 +#include "nsNullPrincipal.h"
1.160 +#include "nsParserCIID.h"
1.161 +#include "nsParserConstants.h"
1.162 +#include "nsPIDOMWindow.h"
1.163 +#include "nsPresContext.h"
1.164 +#include "nsPrintfCString.h"
1.165 +#include "nsReferencedElement.h"
1.166 +#include "nsSandboxFlags.h"
1.167 +#include "nsScriptSecurityManager.h"
1.168 +#include "nsSVGFeatures.h"
1.169 +#include "nsTextEditorState.h"
1.170 +#include "nsTextFragment.h"
1.171 +#include "nsTextNode.h"
1.172 +#include "nsThreadUtils.h"
1.173 +#include "nsUnicharUtilCIID.h"
1.174 +#include "nsUnicodeProperties.h"
1.175 +#include "nsViewManager.h"
1.176 +#include "nsViewportInfo.h"
1.177 +#include "nsWrapperCacheInlines.h"
1.178 +#include "nsXULPopupManager.h"
1.179 +#include "xpcprivate.h" // nsXPConnect
1.180 +#include "HTMLSplitOnSpacesTokenizer.h"
1.181 +#include "nsContentTypeParser.h"
1.182 +#include "mozIThirdPartyUtil.h"
1.183 +
1.184 +#include "nsIBidiKeyboard.h"
1.185 +
1.186 +extern "C" int MOZ_XMLTranslateEntity(const char* ptr, const char* end,
1.187 + const char** next, char16_t* result);
1.188 +extern "C" int MOZ_XMLCheckQName(const char* ptr, const char* end,
1.189 + int ns_aware, const char** colon);
1.190 +
1.191 +class imgLoader;
1.192 +
1.193 +using namespace mozilla::dom;
1.194 +using namespace mozilla::layers;
1.195 +using namespace mozilla::widget;
1.196 +using namespace mozilla;
1.197 +
1.198 +const char kLoadAsData[] = "loadAsData";
1.199 +
1.200 +nsIXPConnect *nsContentUtils::sXPConnect;
1.201 +nsIScriptSecurityManager *nsContentUtils::sSecurityManager;
1.202 +nsIParserService *nsContentUtils::sParserService = nullptr;
1.203 +nsNameSpaceManager *nsContentUtils::sNameSpaceManager;
1.204 +nsIIOService *nsContentUtils::sIOService;
1.205 +nsIConsoleService *nsContentUtils::sConsoleService;
1.206 +nsDataHashtable<nsISupportsHashKey, EventNameMapping>* nsContentUtils::sAtomEventTable = nullptr;
1.207 +nsDataHashtable<nsStringHashKey, EventNameMapping>* nsContentUtils::sStringEventTable = nullptr;
1.208 +nsCOMArray<nsIAtom>* nsContentUtils::sUserDefinedEvents = nullptr;
1.209 +nsIStringBundleService *nsContentUtils::sStringBundleService;
1.210 +nsIStringBundle *nsContentUtils::sStringBundles[PropertiesFile_COUNT];
1.211 +nsIContentPolicy *nsContentUtils::sContentPolicyService;
1.212 +bool nsContentUtils::sTriedToGetContentPolicy = false;
1.213 +nsILineBreaker *nsContentUtils::sLineBreaker;
1.214 +nsIWordBreaker *nsContentUtils::sWordBreaker;
1.215 +nsIBidiKeyboard *nsContentUtils::sBidiKeyboard = nullptr;
1.216 +uint32_t nsContentUtils::sScriptBlockerCount = 0;
1.217 +#ifdef DEBUG
1.218 +uint32_t nsContentUtils::sDOMNodeRemovedSuppressCount = 0;
1.219 +#endif
1.220 +uint32_t nsContentUtils::sMicroTaskLevel = 0;
1.221 +nsTArray< nsCOMPtr<nsIRunnable> >* nsContentUtils::sBlockedScriptRunners = nullptr;
1.222 +uint32_t nsContentUtils::sRunnersCountAtFirstBlocker = 0;
1.223 +nsIInterfaceRequestor* nsContentUtils::sSameOriginChecker = nullptr;
1.224 +
1.225 +bool nsContentUtils::sIsHandlingKeyBoardEvent = false;
1.226 +bool nsContentUtils::sAllowXULXBL_for_file = false;
1.227 +
1.228 +nsString* nsContentUtils::sShiftText = nullptr;
1.229 +nsString* nsContentUtils::sControlText = nullptr;
1.230 +nsString* nsContentUtils::sMetaText = nullptr;
1.231 +nsString* nsContentUtils::sOSText = nullptr;
1.232 +nsString* nsContentUtils::sAltText = nullptr;
1.233 +nsString* nsContentUtils::sModifierSeparator = nullptr;
1.234 +
1.235 +bool nsContentUtils::sInitialized = false;
1.236 +bool nsContentUtils::sIsFullScreenApiEnabled = false;
1.237 +bool nsContentUtils::sTrustedFullScreenOnly = true;
1.238 +bool nsContentUtils::sFullscreenApiIsContentOnly = false;
1.239 +bool nsContentUtils::sIsIdleObserverAPIEnabled = false;
1.240 +bool nsContentUtils::sIsPerformanceTimingEnabled = false;
1.241 +bool nsContentUtils::sIsResourceTimingEnabled = false;
1.242 +
1.243 +uint32_t nsContentUtils::sHandlingInputTimeout = 1000;
1.244 +
1.245 +nsHtml5StringParser* nsContentUtils::sHTMLFragmentParser = nullptr;
1.246 +nsIParser* nsContentUtils::sXMLFragmentParser = nullptr;
1.247 +nsIFragmentContentSink* nsContentUtils::sXMLFragmentSink = nullptr;
1.248 +bool nsContentUtils::sFragmentParsingActive = false;
1.249 +
1.250 +#if !(defined(DEBUG) || defined(MOZ_ENABLE_JS_DUMP))
1.251 +bool nsContentUtils::sDOMWindowDumpEnabled;
1.252 +#endif
1.253 +
1.254 +namespace {
1.255 +
1.256 +static NS_DEFINE_CID(kParserServiceCID, NS_PARSERSERVICE_CID);
1.257 +static NS_DEFINE_CID(kCParserCID, NS_PARSER_CID);
1.258 +
1.259 +static PLDHashTable sEventListenerManagersHash;
1.260 +
1.261 +class DOMEventListenerManagersHashReporter MOZ_FINAL : public nsIMemoryReporter
1.262 +{
1.263 + MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf)
1.264 +
1.265 +public:
1.266 + NS_DECL_ISUPPORTS
1.267 +
1.268 + NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
1.269 + nsISupports* aData)
1.270 + {
1.271 + // We don't measure the |EventListenerManager| objects pointed to by the
1.272 + // entries because those references are non-owning.
1.273 + int64_t amount = sEventListenerManagersHash.ops
1.274 + ? PL_DHashTableSizeOfExcludingThis(
1.275 + &sEventListenerManagersHash, nullptr, MallocSizeOf)
1.276 + : 0;
1.277 +
1.278 + return MOZ_COLLECT_REPORT(
1.279 + "explicit/dom/event-listener-managers-hash", KIND_HEAP, UNITS_BYTES,
1.280 + amount,
1.281 + "Memory used by the event listener manager's hash table.");
1.282 + }
1.283 +};
1.284 +
1.285 +NS_IMPL_ISUPPORTS(DOMEventListenerManagersHashReporter, nsIMemoryReporter)
1.286 +
1.287 +class EventListenerManagerMapEntry : public PLDHashEntryHdr
1.288 +{
1.289 +public:
1.290 + EventListenerManagerMapEntry(const void *aKey)
1.291 + : mKey(aKey)
1.292 + {
1.293 + }
1.294 +
1.295 + ~EventListenerManagerMapEntry()
1.296 + {
1.297 + NS_ASSERTION(!mListenerManager, "caller must release and disconnect ELM");
1.298 + }
1.299 +
1.300 +protected: // declared protected to silence clang warnings
1.301 + const void *mKey; // must be first, to look like PLDHashEntryStub
1.302 +
1.303 +public:
1.304 + nsRefPtr<EventListenerManager> mListenerManager;
1.305 +};
1.306 +
1.307 +static bool
1.308 +EventListenerManagerHashInitEntry(PLDHashTable *table, PLDHashEntryHdr *entry,
1.309 + const void *key)
1.310 +{
1.311 + // Initialize the entry with placement new
1.312 + new (entry) EventListenerManagerMapEntry(key);
1.313 + return true;
1.314 +}
1.315 +
1.316 +static void
1.317 +EventListenerManagerHashClearEntry(PLDHashTable *table, PLDHashEntryHdr *entry)
1.318 +{
1.319 + EventListenerManagerMapEntry *lm =
1.320 + static_cast<EventListenerManagerMapEntry *>(entry);
1.321 +
1.322 + // Let the EventListenerManagerMapEntry clean itself up...
1.323 + lm->~EventListenerManagerMapEntry();
1.324 +}
1.325 +
1.326 +class SameOriginChecker MOZ_FINAL : public nsIChannelEventSink,
1.327 + public nsIInterfaceRequestor
1.328 +{
1.329 + NS_DECL_ISUPPORTS
1.330 + NS_DECL_NSICHANNELEVENTSINK
1.331 + NS_DECL_NSIINTERFACEREQUESTOR
1.332 +};
1.333 +
1.334 +class CharsetDetectionObserver MOZ_FINAL : public nsICharsetDetectionObserver
1.335 +{
1.336 +public:
1.337 + NS_DECL_ISUPPORTS
1.338 +
1.339 + NS_IMETHOD Notify(const char *aCharset, nsDetectionConfident aConf)
1.340 + {
1.341 + mCharset = aCharset;
1.342 + return NS_OK;
1.343 + }
1.344 +
1.345 + const nsACString& GetResult() const
1.346 + {
1.347 + return mCharset;
1.348 + }
1.349 +
1.350 +private:
1.351 + nsCString mCharset;
1.352 +};
1.353 +
1.354 +} // anonymous namespace
1.355 +
1.356 +/* static */
1.357 +TimeDuration
1.358 +nsContentUtils::HandlingUserInputTimeout()
1.359 +{
1.360 + return TimeDuration::FromMilliseconds(sHandlingInputTimeout);
1.361 +}
1.362 +
1.363 +// static
1.364 +nsresult
1.365 +nsContentUtils::Init()
1.366 +{
1.367 + if (sInitialized) {
1.368 + NS_WARNING("Init() called twice");
1.369 +
1.370 + return NS_OK;
1.371 + }
1.372 +
1.373 + sNameSpaceManager = nsNameSpaceManager::GetInstance();
1.374 + NS_ENSURE_TRUE(sNameSpaceManager, NS_ERROR_OUT_OF_MEMORY);
1.375 +
1.376 + sXPConnect = nsXPConnect::XPConnect();
1.377 +
1.378 + sSecurityManager = nsScriptSecurityManager::GetScriptSecurityManager();
1.379 + if(!sSecurityManager)
1.380 + return NS_ERROR_FAILURE;
1.381 + NS_ADDREF(sSecurityManager);
1.382 +
1.383 + // Getting the first context can trigger GC, so do this non-lazily.
1.384 + sXPConnect->InitSafeJSContext();
1.385 +
1.386 + nsresult rv = CallGetService(NS_IOSERVICE_CONTRACTID, &sIOService);
1.387 + if (NS_FAILED(rv)) {
1.388 + // This makes life easier, but we can live without it.
1.389 +
1.390 + sIOService = nullptr;
1.391 + }
1.392 +
1.393 + rv = CallGetService(NS_LBRK_CONTRACTID, &sLineBreaker);
1.394 + NS_ENSURE_SUCCESS(rv, rv);
1.395 +
1.396 + rv = CallGetService(NS_WBRK_CONTRACTID, &sWordBreaker);
1.397 + NS_ENSURE_SUCCESS(rv, rv);
1.398 +
1.399 + if (!InitializeEventTable())
1.400 + return NS_ERROR_FAILURE;
1.401 +
1.402 + if (!sEventListenerManagersHash.ops) {
1.403 + static const PLDHashTableOps hash_table_ops =
1.404 + {
1.405 + PL_DHashAllocTable,
1.406 + PL_DHashFreeTable,
1.407 + PL_DHashVoidPtrKeyStub,
1.408 + PL_DHashMatchEntryStub,
1.409 + PL_DHashMoveEntryStub,
1.410 + EventListenerManagerHashClearEntry,
1.411 + PL_DHashFinalizeStub,
1.412 + EventListenerManagerHashInitEntry
1.413 + };
1.414 +
1.415 + PL_DHashTableInit(&sEventListenerManagersHash, &hash_table_ops,
1.416 + nullptr, sizeof(EventListenerManagerMapEntry), 16);
1.417 +
1.418 + RegisterStrongMemoryReporter(new DOMEventListenerManagersHashReporter());
1.419 + }
1.420 +
1.421 + sBlockedScriptRunners = new nsTArray< nsCOMPtr<nsIRunnable> >;
1.422 +
1.423 + Preferences::AddBoolVarCache(&sAllowXULXBL_for_file,
1.424 + "dom.allow_XUL_XBL_for_file");
1.425 +
1.426 + Preferences::AddBoolVarCache(&sIsFullScreenApiEnabled,
1.427 + "full-screen-api.enabled");
1.428 +
1.429 + // Note: We deliberately read this pref here because this code runs
1.430 + // before the profile loads, so users' changes to this pref in about:config
1.431 + // won't have any effect on behaviour. We don't really want users messing
1.432 + // with this pref, as it affects the security model of the fullscreen API.
1.433 + sFullscreenApiIsContentOnly = Preferences::GetBool("full-screen-api.content-only", false);
1.434 +
1.435 + Preferences::AddBoolVarCache(&sTrustedFullScreenOnly,
1.436 + "full-screen-api.allow-trusted-requests-only");
1.437 +
1.438 + sIsIdleObserverAPIEnabled = Preferences::GetBool("dom.idle-observers-api.enabled", true);
1.439 +
1.440 + Preferences::AddBoolVarCache(&sIsPerformanceTimingEnabled,
1.441 + "dom.enable_performance", true);
1.442 +
1.443 + Preferences::AddBoolVarCache(&sIsResourceTimingEnabled,
1.444 + "dom.enable_resource_timing", true);
1.445 +
1.446 + Preferences::AddUintVarCache(&sHandlingInputTimeout,
1.447 + "dom.event.handling-user-input-time-limit",
1.448 + 1000);
1.449 +
1.450 +#if !(defined(DEBUG) || defined(MOZ_ENABLE_JS_DUMP))
1.451 + Preferences::AddBoolVarCache(&sDOMWindowDumpEnabled,
1.452 + "browser.dom.window.dump.enabled");
1.453 +#endif
1.454 +
1.455 + Element::InitCCCallbacks();
1.456 +
1.457 + sInitialized = true;
1.458 +
1.459 + return NS_OK;
1.460 +}
1.461 +
1.462 +void
1.463 +nsContentUtils::GetShiftText(nsAString& text)
1.464 +{
1.465 + if (!sShiftText)
1.466 + InitializeModifierStrings();
1.467 + text.Assign(*sShiftText);
1.468 +}
1.469 +
1.470 +void
1.471 +nsContentUtils::GetControlText(nsAString& text)
1.472 +{
1.473 + if (!sControlText)
1.474 + InitializeModifierStrings();
1.475 + text.Assign(*sControlText);
1.476 +}
1.477 +
1.478 +void
1.479 +nsContentUtils::GetMetaText(nsAString& text)
1.480 +{
1.481 + if (!sMetaText)
1.482 + InitializeModifierStrings();
1.483 + text.Assign(*sMetaText);
1.484 +}
1.485 +
1.486 +void
1.487 +nsContentUtils::GetOSText(nsAString& text)
1.488 +{
1.489 + if (!sOSText) {
1.490 + InitializeModifierStrings();
1.491 + }
1.492 + text.Assign(*sOSText);
1.493 +}
1.494 +
1.495 +void
1.496 +nsContentUtils::GetAltText(nsAString& text)
1.497 +{
1.498 + if (!sAltText)
1.499 + InitializeModifierStrings();
1.500 + text.Assign(*sAltText);
1.501 +}
1.502 +
1.503 +void
1.504 +nsContentUtils::GetModifierSeparatorText(nsAString& text)
1.505 +{
1.506 + if (!sModifierSeparator)
1.507 + InitializeModifierStrings();
1.508 + text.Assign(*sModifierSeparator);
1.509 +}
1.510 +
1.511 +void
1.512 +nsContentUtils::InitializeModifierStrings()
1.513 +{
1.514 + //load the display strings for the keyboard accelerators
1.515 + nsCOMPtr<nsIStringBundleService> bundleService =
1.516 + mozilla::services::GetStringBundleService();
1.517 + nsCOMPtr<nsIStringBundle> bundle;
1.518 + DebugOnly<nsresult> rv = NS_OK;
1.519 + if (bundleService) {
1.520 + rv = bundleService->CreateBundle( "chrome://global-platform/locale/platformKeys.properties",
1.521 + getter_AddRefs(bundle));
1.522 + }
1.523 +
1.524 + NS_ASSERTION(NS_SUCCEEDED(rv) && bundle, "chrome://global/locale/platformKeys.properties could not be loaded");
1.525 + nsXPIDLString shiftModifier;
1.526 + nsXPIDLString metaModifier;
1.527 + nsXPIDLString osModifier;
1.528 + nsXPIDLString altModifier;
1.529 + nsXPIDLString controlModifier;
1.530 + nsXPIDLString modifierSeparator;
1.531 + if (bundle) {
1.532 + //macs use symbols for each modifier key, so fetch each from the bundle, which also covers i18n
1.533 + bundle->GetStringFromName(MOZ_UTF16("VK_SHIFT"), getter_Copies(shiftModifier));
1.534 + bundle->GetStringFromName(MOZ_UTF16("VK_META"), getter_Copies(metaModifier));
1.535 + bundle->GetStringFromName(MOZ_UTF16("VK_WIN"), getter_Copies(osModifier));
1.536 + bundle->GetStringFromName(MOZ_UTF16("VK_ALT"), getter_Copies(altModifier));
1.537 + bundle->GetStringFromName(MOZ_UTF16("VK_CONTROL"), getter_Copies(controlModifier));
1.538 + bundle->GetStringFromName(MOZ_UTF16("MODIFIER_SEPARATOR"), getter_Copies(modifierSeparator));
1.539 + }
1.540 + //if any of these don't exist, we get an empty string
1.541 + sShiftText = new nsString(shiftModifier);
1.542 + sMetaText = new nsString(metaModifier);
1.543 + sOSText = new nsString(osModifier);
1.544 + sAltText = new nsString(altModifier);
1.545 + sControlText = new nsString(controlModifier);
1.546 + sModifierSeparator = new nsString(modifierSeparator);
1.547 +}
1.548 +
1.549 +bool
1.550 +nsContentUtils::InitializeEventTable() {
1.551 + NS_ASSERTION(!sAtomEventTable, "EventTable already initialized!");
1.552 + NS_ASSERTION(!sStringEventTable, "EventTable already initialized!");
1.553 +
1.554 + static const EventNameMapping eventArray[] = {
1.555 +#define EVENT(name_, _id, _type, _struct) \
1.556 + { nsGkAtoms::on##name_, _id, _type, _struct },
1.557 +#define WINDOW_ONLY_EVENT EVENT
1.558 +#define NON_IDL_EVENT EVENT
1.559 +#include "mozilla/EventNameList.h"
1.560 +#undef WINDOW_ONLY_EVENT
1.561 +#undef EVENT
1.562 + { nullptr }
1.563 + };
1.564 +
1.565 + sAtomEventTable = new nsDataHashtable<nsISupportsHashKey, EventNameMapping>(
1.566 + int(ArrayLength(eventArray) / 0.75) + 1);
1.567 + sStringEventTable = new nsDataHashtable<nsStringHashKey, EventNameMapping>(
1.568 + int(ArrayLength(eventArray) / 0.75) + 1);
1.569 + sUserDefinedEvents = new nsCOMArray<nsIAtom>(64);
1.570 +
1.571 + // Subtract one from the length because of the trailing null
1.572 + for (uint32_t i = 0; i < ArrayLength(eventArray) - 1; ++i) {
1.573 + sAtomEventTable->Put(eventArray[i].mAtom, eventArray[i]);
1.574 + sStringEventTable->Put(Substring(nsDependentAtomString(eventArray[i].mAtom), 2),
1.575 + eventArray[i]);
1.576 + }
1.577 +
1.578 + return true;
1.579 +}
1.580 +
1.581 +void
1.582 +nsContentUtils::InitializeTouchEventTable()
1.583 +{
1.584 + static bool sEventTableInitialized = false;
1.585 + if (!sEventTableInitialized && sAtomEventTable && sStringEventTable) {
1.586 + sEventTableInitialized = true;
1.587 + static const EventNameMapping touchEventArray[] = {
1.588 +#define EVENT(name_, _id, _type, _struct)
1.589 +#define TOUCH_EVENT(name_, _id, _type, _struct) \
1.590 + { nsGkAtoms::on##name_, _id, _type, _struct },
1.591 +#include "mozilla/EventNameList.h"
1.592 +#undef TOUCH_EVENT
1.593 +#undef EVENT
1.594 + { nullptr }
1.595 + };
1.596 + // Subtract one from the length because of the trailing null
1.597 + for (uint32_t i = 0; i < ArrayLength(touchEventArray) - 1; ++i) {
1.598 + sAtomEventTable->Put(touchEventArray[i].mAtom, touchEventArray[i]);
1.599 + sStringEventTable->Put(Substring(nsDependentAtomString(touchEventArray[i].mAtom), 2),
1.600 + touchEventArray[i]);
1.601 + }
1.602 + }
1.603 +}
1.604 +
1.605 +static bool
1.606 +Is8bit(const nsAString& aString)
1.607 +{
1.608 + static const char16_t EIGHT_BIT = char16_t(~0x00FF);
1.609 +
1.610 + nsAString::const_iterator done_reading;
1.611 + aString.EndReading(done_reading);
1.612 +
1.613 + // for each chunk of |aString|...
1.614 + uint32_t fragmentLength = 0;
1.615 + nsAString::const_iterator iter;
1.616 + for (aString.BeginReading(iter); iter != done_reading;
1.617 + iter.advance(int32_t(fragmentLength))) {
1.618 + fragmentLength = uint32_t(iter.size_forward());
1.619 + const char16_t* c = iter.get();
1.620 + const char16_t* fragmentEnd = c + fragmentLength;
1.621 +
1.622 + // for each character in this chunk...
1.623 + while (c < fragmentEnd) {
1.624 + if (*c++ & EIGHT_BIT) {
1.625 + return false;
1.626 + }
1.627 + }
1.628 + }
1.629 +
1.630 + return true;
1.631 +}
1.632 +
1.633 +nsresult
1.634 +nsContentUtils::Btoa(const nsAString& aBinaryData,
1.635 + nsAString& aAsciiBase64String)
1.636 +{
1.637 + if (!Is8bit(aBinaryData)) {
1.638 + aAsciiBase64String.Truncate();
1.639 + return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
1.640 + }
1.641 +
1.642 + return Base64Encode(aBinaryData, aAsciiBase64String);
1.643 +}
1.644 +
1.645 +nsresult
1.646 +nsContentUtils::Atob(const nsAString& aAsciiBase64String,
1.647 + nsAString& aBinaryData)
1.648 +{
1.649 + if (!Is8bit(aAsciiBase64String)) {
1.650 + aBinaryData.Truncate();
1.651 + return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
1.652 + }
1.653 +
1.654 + const char16_t* start = aAsciiBase64String.BeginReading();
1.655 + const char16_t* end = aAsciiBase64String.EndReading();
1.656 + nsString trimmedString;
1.657 + if (!trimmedString.SetCapacity(aAsciiBase64String.Length(), fallible_t())) {
1.658 + return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
1.659 + }
1.660 + while (start < end) {
1.661 + if (!nsContentUtils::IsHTMLWhitespace(*start)) {
1.662 + trimmedString.Append(*start);
1.663 + }
1.664 + start++;
1.665 + }
1.666 + nsresult rv = Base64Decode(trimmedString, aBinaryData);
1.667 + if (NS_FAILED(rv) && rv == NS_ERROR_INVALID_ARG) {
1.668 + return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
1.669 + }
1.670 + return rv;
1.671 +}
1.672 +
1.673 +bool
1.674 +nsContentUtils::IsAutocompleteEnabled(nsIDOMHTMLInputElement* aInput)
1.675 +{
1.676 + NS_PRECONDITION(aInput, "aInput should not be null!");
1.677 +
1.678 + nsAutoString autocomplete;
1.679 + aInput->GetAutocomplete(autocomplete);
1.680 +
1.681 + if (autocomplete.IsEmpty()) {
1.682 + nsCOMPtr<nsIDOMHTMLFormElement> form;
1.683 + aInput->GetForm(getter_AddRefs(form));
1.684 + if (!form) {
1.685 + return true;
1.686 + }
1.687 +
1.688 + form->GetAutocomplete(autocomplete);
1.689 + }
1.690 +
1.691 + return autocomplete.EqualsLiteral("on");
1.692 +}
1.693 +
1.694 +#define SKIP_WHITESPACE(iter, end_iter, end_res) \
1.695 + while ((iter) != (end_iter) && nsCRT::IsAsciiSpace(*(iter))) { \
1.696 + ++(iter); \
1.697 + } \
1.698 + if ((iter) == (end_iter)) { \
1.699 + return (end_res); \
1.700 + }
1.701 +
1.702 +#define SKIP_ATTR_NAME(iter, end_iter) \
1.703 + while ((iter) != (end_iter) && !nsCRT::IsAsciiSpace(*(iter)) && \
1.704 + *(iter) != '=') { \
1.705 + ++(iter); \
1.706 + }
1.707 +
1.708 +bool
1.709 +nsContentUtils::GetPseudoAttributeValue(const nsString& aSource, nsIAtom *aName,
1.710 + nsAString& aValue)
1.711 +{
1.712 + aValue.Truncate();
1.713 +
1.714 + const char16_t *start = aSource.get();
1.715 + const char16_t *end = start + aSource.Length();
1.716 + const char16_t *iter;
1.717 +
1.718 + while (start != end) {
1.719 + SKIP_WHITESPACE(start, end, false)
1.720 + iter = start;
1.721 + SKIP_ATTR_NAME(iter, end)
1.722 +
1.723 + if (start == iter) {
1.724 + return false;
1.725 + }
1.726 +
1.727 + // Remember the attr name.
1.728 + const nsDependentSubstring & attrName = Substring(start, iter);
1.729 +
1.730 + // Now check whether this is a valid name="value" pair.
1.731 + start = iter;
1.732 + SKIP_WHITESPACE(start, end, false)
1.733 + if (*start != '=') {
1.734 + // No '=', so this is not a name="value" pair. We don't know
1.735 + // what it is, and we have no way to handle it.
1.736 + return false;
1.737 + }
1.738 +
1.739 + // Have to skip the value.
1.740 + ++start;
1.741 + SKIP_WHITESPACE(start, end, false)
1.742 + char16_t q = *start;
1.743 + if (q != kQuote && q != kApostrophe) {
1.744 + // Not a valid quoted value, so bail.
1.745 + return false;
1.746 + }
1.747 +
1.748 + ++start; // Point to the first char of the value.
1.749 + iter = start;
1.750 +
1.751 + while (iter != end && *iter != q) {
1.752 + ++iter;
1.753 + }
1.754 +
1.755 + if (iter == end) {
1.756 + // Oops, unterminated quoted string.
1.757 + return false;
1.758 + }
1.759 +
1.760 + // At this point attrName holds the name of the "attribute" and
1.761 + // the value is between start and iter.
1.762 +
1.763 + if (aName->Equals(attrName)) {
1.764 + // We'll accumulate as many characters as possible (until we hit either
1.765 + // the end of the string or the beginning of an entity). Chunks will be
1.766 + // delimited by start and chunkEnd.
1.767 + const char16_t *chunkEnd = start;
1.768 + while (chunkEnd != iter) {
1.769 + if (*chunkEnd == kLessThan) {
1.770 + aValue.Truncate();
1.771 +
1.772 + return false;
1.773 + }
1.774 +
1.775 + if (*chunkEnd == kAmpersand) {
1.776 + aValue.Append(start, chunkEnd - start);
1.777 +
1.778 + // Point to first character after the ampersand.
1.779 + ++chunkEnd;
1.780 +
1.781 + const char16_t *afterEntity = nullptr;
1.782 + char16_t result[2];
1.783 + uint32_t count =
1.784 + MOZ_XMLTranslateEntity(reinterpret_cast<const char*>(chunkEnd),
1.785 + reinterpret_cast<const char*>(iter),
1.786 + reinterpret_cast<const char**>(&afterEntity),
1.787 + result);
1.788 + if (count == 0) {
1.789 + aValue.Truncate();
1.790 +
1.791 + return false;
1.792 + }
1.793 +
1.794 + aValue.Append(result, count);
1.795 +
1.796 + // Advance to after the entity and begin a new chunk.
1.797 + start = chunkEnd = afterEntity;
1.798 + }
1.799 + else {
1.800 + ++chunkEnd;
1.801 + }
1.802 + }
1.803 +
1.804 + // Append remainder.
1.805 + aValue.Append(start, iter - start);
1.806 +
1.807 + return true;
1.808 + }
1.809 +
1.810 + // Resume scanning after the end of the attribute value (past the quote
1.811 + // char).
1.812 + start = iter + 1;
1.813 + }
1.814 +
1.815 + return false;
1.816 +}
1.817 +
1.818 +bool
1.819 +nsContentUtils::IsJavaScriptLanguage(const nsString& aName)
1.820 +{
1.821 + return aName.LowerCaseEqualsLiteral("javascript") ||
1.822 + aName.LowerCaseEqualsLiteral("livescript") ||
1.823 + aName.LowerCaseEqualsLiteral("mocha") ||
1.824 + aName.LowerCaseEqualsLiteral("javascript1.0") ||
1.825 + aName.LowerCaseEqualsLiteral("javascript1.1") ||
1.826 + aName.LowerCaseEqualsLiteral("javascript1.2") ||
1.827 + aName.LowerCaseEqualsLiteral("javascript1.3") ||
1.828 + aName.LowerCaseEqualsLiteral("javascript1.4") ||
1.829 + aName.LowerCaseEqualsLiteral("javascript1.5");
1.830 +}
1.831 +
1.832 +JSVersion
1.833 +nsContentUtils::ParseJavascriptVersion(const nsAString& aVersionStr)
1.834 +{
1.835 + if (aVersionStr.Length() != 3 || aVersionStr[0] != '1' ||
1.836 + aVersionStr[1] != '.') {
1.837 + return JSVERSION_UNKNOWN;
1.838 + }
1.839 +
1.840 + switch (aVersionStr[2]) {
1.841 + case '0': /* fall through */
1.842 + case '1': /* fall through */
1.843 + case '2': /* fall through */
1.844 + case '3': /* fall through */
1.845 + case '4': /* fall through */
1.846 + case '5': return JSVERSION_DEFAULT;
1.847 + case '6': return JSVERSION_1_6;
1.848 + case '7': return JSVERSION_1_7;
1.849 + case '8': return JSVERSION_1_8;
1.850 + default: return JSVERSION_UNKNOWN;
1.851 + }
1.852 +}
1.853 +
1.854 +void
1.855 +nsContentUtils::SplitMimeType(const nsAString& aValue, nsString& aType,
1.856 + nsString& aParams)
1.857 +{
1.858 + aType.Truncate();
1.859 + aParams.Truncate();
1.860 + int32_t semiIndex = aValue.FindChar(char16_t(';'));
1.861 + if (-1 != semiIndex) {
1.862 + aType = Substring(aValue, 0, semiIndex);
1.863 + aParams = Substring(aValue, semiIndex + 1,
1.864 + aValue.Length() - (semiIndex + 1));
1.865 + aParams.StripWhitespace();
1.866 + }
1.867 + else {
1.868 + aType = aValue;
1.869 + }
1.870 + aType.StripWhitespace();
1.871 +}
1.872 +
1.873 +nsresult
1.874 +nsContentUtils::IsUserIdle(uint32_t aRequestedIdleTimeInMS, bool* aUserIsIdle)
1.875 +{
1.876 + nsresult rv;
1.877 + nsCOMPtr<nsIIdleService> idleService =
1.878 + do_GetService("@mozilla.org/widget/idleservice;1", &rv);
1.879 + NS_ENSURE_SUCCESS(rv, rv);
1.880 +
1.881 + uint32_t idleTimeInMS;
1.882 + rv = idleService->GetIdleTime(&idleTimeInMS);
1.883 + NS_ENSURE_SUCCESS(rv, rv);
1.884 +
1.885 + *aUserIsIdle = idleTimeInMS >= aRequestedIdleTimeInMS;
1.886 + return NS_OK;
1.887 +}
1.888 +
1.889 +/**
1.890 + * Access a cached parser service. Don't addref. We need only one
1.891 + * reference to it and this class has that one.
1.892 + */
1.893 +/* static */
1.894 +nsIParserService*
1.895 +nsContentUtils::GetParserService()
1.896 +{
1.897 + // XXX: This isn't accessed from several threads, is it?
1.898 + if (!sParserService) {
1.899 + // Lock, recheck sCachedParserService and aquire if this should be
1.900 + // safe for multiple threads.
1.901 + nsresult rv = CallGetService(kParserServiceCID, &sParserService);
1.902 + if (NS_FAILED(rv)) {
1.903 + sParserService = nullptr;
1.904 + }
1.905 + }
1.906 +
1.907 + return sParserService;
1.908 +}
1.909 +
1.910 +/**
1.911 + * A helper function that parses a sandbox attribute (of an <iframe> or
1.912 + * a CSP directive) and converts it to the set of flags used internally.
1.913 + *
1.914 + * @param sandboxAttr the sandbox attribute
1.915 + * @return the set of flags (0 if sandboxAttr is null)
1.916 + */
1.917 +uint32_t
1.918 +nsContentUtils::ParseSandboxAttributeToFlags(const nsAttrValue* sandboxAttr)
1.919 +{
1.920 + // No sandbox attribute, no sandbox flags.
1.921 + if (!sandboxAttr) { return 0; }
1.922 +
1.923 + // Start off by setting all the restriction flags.
1.924 + uint32_t out = SANDBOXED_NAVIGATION
1.925 + | SANDBOXED_AUXILIARY_NAVIGATION
1.926 + | SANDBOXED_TOPLEVEL_NAVIGATION
1.927 + | SANDBOXED_PLUGINS
1.928 + | SANDBOXED_ORIGIN
1.929 + | SANDBOXED_FORMS
1.930 + | SANDBOXED_SCRIPTS
1.931 + | SANDBOXED_AUTOMATIC_FEATURES
1.932 + | SANDBOXED_POINTER_LOCK
1.933 + | SANDBOXED_DOMAIN;
1.934 +
1.935 +// Macro for updating the flag according to the keywords
1.936 +#define IF_KEYWORD(atom, flags) \
1.937 + if (sandboxAttr->Contains(nsGkAtoms::atom, eIgnoreCase)) { out &= ~(flags); }
1.938 +
1.939 + IF_KEYWORD(allowsameorigin, SANDBOXED_ORIGIN)
1.940 + IF_KEYWORD(allowforms, SANDBOXED_FORMS)
1.941 + IF_KEYWORD(allowscripts, SANDBOXED_SCRIPTS | SANDBOXED_AUTOMATIC_FEATURES)
1.942 + IF_KEYWORD(allowtopnavigation, SANDBOXED_TOPLEVEL_NAVIGATION)
1.943 + IF_KEYWORD(allowpointerlock, SANDBOXED_POINTER_LOCK)
1.944 + IF_KEYWORD(allowpopups, SANDBOXED_AUXILIARY_NAVIGATION)
1.945 +
1.946 + return out;
1.947 +#undef IF_KEYWORD
1.948 +}
1.949 +
1.950 +nsIBidiKeyboard*
1.951 +nsContentUtils::GetBidiKeyboard()
1.952 +{
1.953 + if (!sBidiKeyboard) {
1.954 + nsresult rv = CallGetService("@mozilla.org/widget/bidikeyboard;1", &sBidiKeyboard);
1.955 + if (NS_FAILED(rv)) {
1.956 + sBidiKeyboard = nullptr;
1.957 + }
1.958 + }
1.959 + return sBidiKeyboard;
1.960 +}
1.961 +
1.962 +template <class OutputIterator>
1.963 +struct NormalizeNewlinesCharTraits {
1.964 + public:
1.965 + typedef typename OutputIterator::value_type value_type;
1.966 +
1.967 + public:
1.968 + NormalizeNewlinesCharTraits(OutputIterator& aIterator) : mIterator(aIterator) { }
1.969 + void writechar(typename OutputIterator::value_type aChar) {
1.970 + *mIterator++ = aChar;
1.971 + }
1.972 +
1.973 + private:
1.974 + OutputIterator mIterator;
1.975 +};
1.976 +
1.977 +template <class CharT>
1.978 +struct NormalizeNewlinesCharTraits<CharT*> {
1.979 + public:
1.980 + typedef CharT value_type;
1.981 +
1.982 + public:
1.983 + NormalizeNewlinesCharTraits(CharT* aCharPtr) : mCharPtr(aCharPtr) { }
1.984 + void writechar(CharT aChar) {
1.985 + *mCharPtr++ = aChar;
1.986 + }
1.987 +
1.988 + private:
1.989 + CharT* mCharPtr;
1.990 +};
1.991 +
1.992 +template <class OutputIterator>
1.993 +class CopyNormalizeNewlines
1.994 +{
1.995 + public:
1.996 + typedef typename OutputIterator::value_type value_type;
1.997 +
1.998 + public:
1.999 + CopyNormalizeNewlines(OutputIterator* aDestination,
1.1000 + bool aLastCharCR=false) :
1.1001 + mLastCharCR(aLastCharCR),
1.1002 + mDestination(aDestination),
1.1003 + mWritten(0)
1.1004 + { }
1.1005 +
1.1006 + uint32_t GetCharsWritten() {
1.1007 + return mWritten;
1.1008 + }
1.1009 +
1.1010 + bool IsLastCharCR() {
1.1011 + return mLastCharCR;
1.1012 + }
1.1013 +
1.1014 + void write(const typename OutputIterator::value_type* aSource, uint32_t aSourceLength) {
1.1015 +
1.1016 + const typename OutputIterator::value_type* done_writing = aSource + aSourceLength;
1.1017 +
1.1018 + // If the last source buffer ended with a CR...
1.1019 + if (mLastCharCR) {
1.1020 + // ..and if the next one is a LF, then skip it since
1.1021 + // we've already written out a newline
1.1022 + if (aSourceLength && (*aSource == value_type('\n'))) {
1.1023 + ++aSource;
1.1024 + }
1.1025 + mLastCharCR = false;
1.1026 + }
1.1027 +
1.1028 + uint32_t num_written = 0;
1.1029 + while ( aSource < done_writing ) {
1.1030 + if (*aSource == value_type('\r')) {
1.1031 + mDestination->writechar('\n');
1.1032 + ++aSource;
1.1033 + // If we've reached the end of the buffer, record
1.1034 + // that we wrote out a CR
1.1035 + if (aSource == done_writing) {
1.1036 + mLastCharCR = true;
1.1037 + }
1.1038 + // If the next character is a LF, skip it
1.1039 + else if (*aSource == value_type('\n')) {
1.1040 + ++aSource;
1.1041 + }
1.1042 + }
1.1043 + else {
1.1044 + mDestination->writechar(*aSource++);
1.1045 + }
1.1046 + ++num_written;
1.1047 + }
1.1048 +
1.1049 + mWritten += num_written;
1.1050 + }
1.1051 +
1.1052 + private:
1.1053 + bool mLastCharCR;
1.1054 + OutputIterator* mDestination;
1.1055 + uint32_t mWritten;
1.1056 +};
1.1057 +
1.1058 +// static
1.1059 +uint32_t
1.1060 +nsContentUtils::CopyNewlineNormalizedUnicodeTo(const nsAString& aSource,
1.1061 + uint32_t aSrcOffset,
1.1062 + char16_t* aDest,
1.1063 + uint32_t aLength,
1.1064 + bool& aLastCharCR)
1.1065 +{
1.1066 + typedef NormalizeNewlinesCharTraits<char16_t*> sink_traits;
1.1067 +
1.1068 + sink_traits dest_traits(aDest);
1.1069 + CopyNormalizeNewlines<sink_traits> normalizer(&dest_traits,aLastCharCR);
1.1070 + nsReadingIterator<char16_t> fromBegin, fromEnd;
1.1071 + copy_string(aSource.BeginReading(fromBegin).advance( int32_t(aSrcOffset) ),
1.1072 + aSource.BeginReading(fromEnd).advance( int32_t(aSrcOffset+aLength) ),
1.1073 + normalizer);
1.1074 + aLastCharCR = normalizer.IsLastCharCR();
1.1075 + return normalizer.GetCharsWritten();
1.1076 +}
1.1077 +
1.1078 +// static
1.1079 +uint32_t
1.1080 +nsContentUtils::CopyNewlineNormalizedUnicodeTo(nsReadingIterator<char16_t>& aSrcStart, const nsReadingIterator<char16_t>& aSrcEnd, nsAString& aDest)
1.1081 +{
1.1082 + typedef nsWritingIterator<char16_t> WritingIterator;
1.1083 + typedef NormalizeNewlinesCharTraits<WritingIterator> sink_traits;
1.1084 +
1.1085 + WritingIterator iter;
1.1086 + aDest.BeginWriting(iter);
1.1087 + sink_traits dest_traits(iter);
1.1088 + CopyNormalizeNewlines<sink_traits> normalizer(&dest_traits);
1.1089 + copy_string(aSrcStart, aSrcEnd, normalizer);
1.1090 + return normalizer.GetCharsWritten();
1.1091 +}
1.1092 +
1.1093 +/**
1.1094 + * This is used to determine whether a character is in one of the punctuation
1.1095 + * mark classes which CSS says should be part of the first-letter.
1.1096 + * See http://www.w3.org/TR/CSS2/selector.html#first-letter and
1.1097 + * http://www.w3.org/TR/selectors/#first-letter
1.1098 + */
1.1099 +
1.1100 +// static
1.1101 +bool
1.1102 +nsContentUtils::IsFirstLetterPunctuation(uint32_t aChar)
1.1103 +{
1.1104 + uint8_t cat = mozilla::unicode::GetGeneralCategory(aChar);
1.1105 +
1.1106 + return (cat == HB_UNICODE_GENERAL_CATEGORY_OPEN_PUNCTUATION || // Ps
1.1107 + cat == HB_UNICODE_GENERAL_CATEGORY_CLOSE_PUNCTUATION || // Pe
1.1108 + cat == HB_UNICODE_GENERAL_CATEGORY_INITIAL_PUNCTUATION || // Pi
1.1109 + cat == HB_UNICODE_GENERAL_CATEGORY_FINAL_PUNCTUATION || // Pf
1.1110 + cat == HB_UNICODE_GENERAL_CATEGORY_OTHER_PUNCTUATION); // Po
1.1111 +}
1.1112 +
1.1113 +// static
1.1114 +bool
1.1115 +nsContentUtils::IsFirstLetterPunctuationAt(const nsTextFragment* aFrag, uint32_t aOffset)
1.1116 +{
1.1117 + char16_t h = aFrag->CharAt(aOffset);
1.1118 + if (!IS_SURROGATE(h)) {
1.1119 + return IsFirstLetterPunctuation(h);
1.1120 + }
1.1121 + if (NS_IS_HIGH_SURROGATE(h) && aOffset + 1 < aFrag->GetLength()) {
1.1122 + char16_t l = aFrag->CharAt(aOffset + 1);
1.1123 + if (NS_IS_LOW_SURROGATE(l)) {
1.1124 + return IsFirstLetterPunctuation(SURROGATE_TO_UCS4(h, l));
1.1125 + }
1.1126 + }
1.1127 + return false;
1.1128 +}
1.1129 +
1.1130 +// static
1.1131 +bool nsContentUtils::IsAlphanumeric(uint32_t aChar)
1.1132 +{
1.1133 + nsIUGenCategory::nsUGenCategory cat = mozilla::unicode::GetGenCategory(aChar);
1.1134 +
1.1135 + return (cat == nsIUGenCategory::kLetter || cat == nsIUGenCategory::kNumber);
1.1136 +}
1.1137 +
1.1138 +// static
1.1139 +bool nsContentUtils::IsAlphanumericAt(const nsTextFragment* aFrag, uint32_t aOffset)
1.1140 +{
1.1141 + char16_t h = aFrag->CharAt(aOffset);
1.1142 + if (!IS_SURROGATE(h)) {
1.1143 + return IsAlphanumeric(h);
1.1144 + }
1.1145 + if (NS_IS_HIGH_SURROGATE(h) && aOffset + 1 < aFrag->GetLength()) {
1.1146 + char16_t l = aFrag->CharAt(aOffset + 1);
1.1147 + if (NS_IS_LOW_SURROGATE(l)) {
1.1148 + return IsAlphanumeric(SURROGATE_TO_UCS4(h, l));
1.1149 + }
1.1150 + }
1.1151 + return false;
1.1152 +}
1.1153 +
1.1154 +/* static */
1.1155 +bool
1.1156 +nsContentUtils::IsHTMLWhitespace(char16_t aChar)
1.1157 +{
1.1158 + return aChar == char16_t(0x0009) ||
1.1159 + aChar == char16_t(0x000A) ||
1.1160 + aChar == char16_t(0x000C) ||
1.1161 + aChar == char16_t(0x000D) ||
1.1162 + aChar == char16_t(0x0020);
1.1163 +}
1.1164 +
1.1165 +/* static */
1.1166 +bool
1.1167 +nsContentUtils::IsHTMLWhitespaceOrNBSP(char16_t aChar)
1.1168 +{
1.1169 + return IsHTMLWhitespace(aChar) || aChar == char16_t(0xA0);
1.1170 +}
1.1171 +
1.1172 +/* static */
1.1173 +bool
1.1174 +nsContentUtils::IsHTMLBlock(nsIAtom* aLocalName)
1.1175 +{
1.1176 + return
1.1177 + (aLocalName == nsGkAtoms::address) ||
1.1178 + (aLocalName == nsGkAtoms::article) ||
1.1179 + (aLocalName == nsGkAtoms::aside) ||
1.1180 + (aLocalName == nsGkAtoms::blockquote) ||
1.1181 + (aLocalName == nsGkAtoms::center) ||
1.1182 + (aLocalName == nsGkAtoms::dir) ||
1.1183 + (aLocalName == nsGkAtoms::div) ||
1.1184 + (aLocalName == nsGkAtoms::dl) || // XXX why not dt and dd?
1.1185 + (aLocalName == nsGkAtoms::fieldset) ||
1.1186 + (aLocalName == nsGkAtoms::figure) || // XXX shouldn't figcaption be on this list
1.1187 + (aLocalName == nsGkAtoms::footer) ||
1.1188 + (aLocalName == nsGkAtoms::form) ||
1.1189 + (aLocalName == nsGkAtoms::h1) ||
1.1190 + (aLocalName == nsGkAtoms::h2) ||
1.1191 + (aLocalName == nsGkAtoms::h3) ||
1.1192 + (aLocalName == nsGkAtoms::h4) ||
1.1193 + (aLocalName == nsGkAtoms::h5) ||
1.1194 + (aLocalName == nsGkAtoms::h6) ||
1.1195 + (aLocalName == nsGkAtoms::header) ||
1.1196 + (aLocalName == nsGkAtoms::hgroup) ||
1.1197 + (aLocalName == nsGkAtoms::hr) ||
1.1198 + (aLocalName == nsGkAtoms::li) ||
1.1199 + (aLocalName == nsGkAtoms::listing) ||
1.1200 + (aLocalName == nsGkAtoms::menu) ||
1.1201 + (aLocalName == nsGkAtoms::multicol) || // XXX get rid of this one?
1.1202 + (aLocalName == nsGkAtoms::nav) ||
1.1203 + (aLocalName == nsGkAtoms::ol) ||
1.1204 + (aLocalName == nsGkAtoms::p) ||
1.1205 + (aLocalName == nsGkAtoms::pre) ||
1.1206 + (aLocalName == nsGkAtoms::section) ||
1.1207 + (aLocalName == nsGkAtoms::table) ||
1.1208 + (aLocalName == nsGkAtoms::ul) ||
1.1209 + (aLocalName == nsGkAtoms::xmp);
1.1210 +}
1.1211 +
1.1212 +/* static */
1.1213 +bool
1.1214 +nsContentUtils::IsHTMLVoid(nsIAtom* aLocalName)
1.1215 +{
1.1216 + return
1.1217 + (aLocalName == nsGkAtoms::area) ||
1.1218 + (aLocalName == nsGkAtoms::base) ||
1.1219 + (aLocalName == nsGkAtoms::basefont) ||
1.1220 + (aLocalName == nsGkAtoms::bgsound) ||
1.1221 + (aLocalName == nsGkAtoms::br) ||
1.1222 + (aLocalName == nsGkAtoms::col) ||
1.1223 + (aLocalName == nsGkAtoms::command) ||
1.1224 + (aLocalName == nsGkAtoms::embed) ||
1.1225 + (aLocalName == nsGkAtoms::frame) ||
1.1226 + (aLocalName == nsGkAtoms::hr) ||
1.1227 + (aLocalName == nsGkAtoms::img) ||
1.1228 + (aLocalName == nsGkAtoms::input) ||
1.1229 + (aLocalName == nsGkAtoms::keygen) ||
1.1230 + (aLocalName == nsGkAtoms::link) ||
1.1231 + (aLocalName == nsGkAtoms::meta) ||
1.1232 + (aLocalName == nsGkAtoms::param) ||
1.1233 + (aLocalName == nsGkAtoms::source) ||
1.1234 + (aLocalName == nsGkAtoms::track) ||
1.1235 + (aLocalName == nsGkAtoms::wbr);
1.1236 +}
1.1237 +
1.1238 +/* static */
1.1239 +bool
1.1240 +nsContentUtils::ParseIntMarginValue(const nsAString& aString, nsIntMargin& result)
1.1241 +{
1.1242 + nsAutoString marginStr(aString);
1.1243 + marginStr.CompressWhitespace(true, true);
1.1244 + if (marginStr.IsEmpty()) {
1.1245 + return false;
1.1246 + }
1.1247 +
1.1248 + int32_t start = 0, end = 0;
1.1249 + for (int count = 0; count < 4; count++) {
1.1250 + if ((uint32_t)end >= marginStr.Length())
1.1251 + return false;
1.1252 +
1.1253 + // top, right, bottom, left
1.1254 + if (count < 3)
1.1255 + end = Substring(marginStr, start).FindChar(',');
1.1256 + else
1.1257 + end = Substring(marginStr, start).Length();
1.1258 +
1.1259 + if (end <= 0)
1.1260 + return false;
1.1261 +
1.1262 + nsresult ec;
1.1263 + int32_t val = nsString(Substring(marginStr, start, end)).ToInteger(&ec);
1.1264 + if (NS_FAILED(ec))
1.1265 + return false;
1.1266 +
1.1267 + switch(count) {
1.1268 + case 0:
1.1269 + result.top = val;
1.1270 + break;
1.1271 + case 1:
1.1272 + result.right = val;
1.1273 + break;
1.1274 + case 2:
1.1275 + result.bottom = val;
1.1276 + break;
1.1277 + case 3:
1.1278 + result.left = val;
1.1279 + break;
1.1280 + }
1.1281 + start += end + 1;
1.1282 + }
1.1283 + return true;
1.1284 +}
1.1285 +
1.1286 +// static
1.1287 +int32_t
1.1288 +nsContentUtils::ParseLegacyFontSize(const nsAString& aValue)
1.1289 +{
1.1290 + nsAString::const_iterator iter, end;
1.1291 + aValue.BeginReading(iter);
1.1292 + aValue.EndReading(end);
1.1293 +
1.1294 + while (iter != end && nsContentUtils::IsHTMLWhitespace(*iter)) {
1.1295 + ++iter;
1.1296 + }
1.1297 +
1.1298 + if (iter == end) {
1.1299 + return 0;
1.1300 + }
1.1301 +
1.1302 + bool relative = false;
1.1303 + bool negate = false;
1.1304 + if (*iter == char16_t('-')) {
1.1305 + relative = true;
1.1306 + negate = true;
1.1307 + ++iter;
1.1308 + } else if (*iter == char16_t('+')) {
1.1309 + relative = true;
1.1310 + ++iter;
1.1311 + }
1.1312 +
1.1313 + if (*iter < char16_t('0') || *iter > char16_t('9')) {
1.1314 + return 0;
1.1315 + }
1.1316 +
1.1317 + // We don't have to worry about overflow, since we can bail out as soon as
1.1318 + // we're bigger than 7.
1.1319 + int32_t value = 0;
1.1320 + while (iter != end && *iter >= char16_t('0') && *iter <= char16_t('9')) {
1.1321 + value = 10*value + (*iter - char16_t('0'));
1.1322 + if (value >= 7) {
1.1323 + break;
1.1324 + }
1.1325 + ++iter;
1.1326 + }
1.1327 +
1.1328 + if (relative) {
1.1329 + if (negate) {
1.1330 + value = 3 - value;
1.1331 + } else {
1.1332 + value = 3 + value;
1.1333 + }
1.1334 + }
1.1335 +
1.1336 + return clamped(value, 1, 7);
1.1337 +}
1.1338 +
1.1339 +/* static */
1.1340 +void
1.1341 +nsContentUtils::GetOfflineAppManifest(nsIDocument *aDocument, nsIURI **aURI)
1.1342 +{
1.1343 + Element* docElement = aDocument->GetRootElement();
1.1344 + if (!docElement) {
1.1345 + return;
1.1346 + }
1.1347 +
1.1348 + nsAutoString manifestSpec;
1.1349 + docElement->GetAttr(kNameSpaceID_None, nsGkAtoms::manifest, manifestSpec);
1.1350 +
1.1351 + // Manifest URIs can't have fragment identifiers.
1.1352 + if (manifestSpec.IsEmpty() ||
1.1353 + manifestSpec.FindChar('#') != kNotFound) {
1.1354 + return;
1.1355 + }
1.1356 +
1.1357 + nsContentUtils::NewURIWithDocumentCharset(aURI, manifestSpec,
1.1358 + aDocument,
1.1359 + aDocument->GetDocBaseURI());
1.1360 +}
1.1361 +
1.1362 +/* static */
1.1363 +bool
1.1364 +nsContentUtils::OfflineAppAllowed(nsIURI *aURI)
1.1365 +{
1.1366 + nsCOMPtr<nsIOfflineCacheUpdateService> updateService =
1.1367 + do_GetService(NS_OFFLINECACHEUPDATESERVICE_CONTRACTID);
1.1368 + if (!updateService) {
1.1369 + return false;
1.1370 + }
1.1371 +
1.1372 + bool allowed;
1.1373 + nsresult rv =
1.1374 + updateService->OfflineAppAllowedForURI(aURI,
1.1375 + Preferences::GetRootBranch(),
1.1376 + &allowed);
1.1377 + return NS_SUCCEEDED(rv) && allowed;
1.1378 +}
1.1379 +
1.1380 +/* static */
1.1381 +bool
1.1382 +nsContentUtils::OfflineAppAllowed(nsIPrincipal *aPrincipal)
1.1383 +{
1.1384 + nsCOMPtr<nsIOfflineCacheUpdateService> updateService =
1.1385 + do_GetService(NS_OFFLINECACHEUPDATESERVICE_CONTRACTID);
1.1386 + if (!updateService) {
1.1387 + return false;
1.1388 + }
1.1389 +
1.1390 + bool allowed;
1.1391 + nsresult rv = updateService->OfflineAppAllowed(aPrincipal,
1.1392 + Preferences::GetRootBranch(),
1.1393 + &allowed);
1.1394 + return NS_SUCCEEDED(rv) && allowed;
1.1395 +}
1.1396 +
1.1397 +bool
1.1398 +nsContentUtils::MaybeAllowOfflineAppByDefault(nsIPrincipal *aPrincipal,
1.1399 + nsIDOMWindow *aWindow)
1.1400 +{
1.1401 + if (!Preferences::GetRootBranch())
1.1402 + return false;
1.1403 +
1.1404 + nsresult rv;
1.1405 +
1.1406 + bool allowedByDefault;
1.1407 + rv = Preferences::GetRootBranch()->GetBoolPref(
1.1408 + "offline-apps.allow_by_default", &allowedByDefault);
1.1409 + if (NS_FAILED(rv))
1.1410 + return false;
1.1411 +
1.1412 + if (!allowedByDefault)
1.1413 + return false;
1.1414 +
1.1415 + nsCOMPtr<nsIOfflineCacheUpdateService> updateService =
1.1416 + do_GetService(NS_OFFLINECACHEUPDATESERVICE_CONTRACTID);
1.1417 + if (!updateService) {
1.1418 + return false;
1.1419 + }
1.1420 +
1.1421 + rv = updateService->AllowOfflineApp(aWindow, aPrincipal);
1.1422 + return NS_SUCCEEDED(rv);
1.1423 +}
1.1424 +
1.1425 +// static
1.1426 +void
1.1427 +nsContentUtils::Shutdown()
1.1428 +{
1.1429 + sInitialized = false;
1.1430 +
1.1431 + NS_IF_RELEASE(sContentPolicyService);
1.1432 + sTriedToGetContentPolicy = false;
1.1433 + uint32_t i;
1.1434 + for (i = 0; i < PropertiesFile_COUNT; ++i)
1.1435 + NS_IF_RELEASE(sStringBundles[i]);
1.1436 +
1.1437 + NS_IF_RELEASE(sStringBundleService);
1.1438 + NS_IF_RELEASE(sConsoleService);
1.1439 + sXPConnect = nullptr;
1.1440 + NS_IF_RELEASE(sSecurityManager);
1.1441 + NS_IF_RELEASE(sParserService);
1.1442 + NS_IF_RELEASE(sIOService);
1.1443 + NS_IF_RELEASE(sLineBreaker);
1.1444 + NS_IF_RELEASE(sWordBreaker);
1.1445 + NS_IF_RELEASE(sBidiKeyboard);
1.1446 +
1.1447 + delete sAtomEventTable;
1.1448 + sAtomEventTable = nullptr;
1.1449 + delete sStringEventTable;
1.1450 + sStringEventTable = nullptr;
1.1451 + delete sUserDefinedEvents;
1.1452 + sUserDefinedEvents = nullptr;
1.1453 +
1.1454 + if (sEventListenerManagersHash.ops) {
1.1455 + NS_ASSERTION(sEventListenerManagersHash.entryCount == 0,
1.1456 + "Event listener manager hash not empty at shutdown!");
1.1457 +
1.1458 + // See comment above.
1.1459 +
1.1460 + // However, we have to handle this table differently. If it still
1.1461 + // has entries, we want to leak it too, so that we can keep it alive
1.1462 + // in case any elements are destroyed. Because if they are, we need
1.1463 + // their event listener managers to be destroyed too, or otherwise
1.1464 + // it could leave dangling references in DOMClassInfo's preserved
1.1465 + // wrapper table.
1.1466 +
1.1467 + if (sEventListenerManagersHash.entryCount == 0) {
1.1468 + PL_DHashTableFinish(&sEventListenerManagersHash);
1.1469 + sEventListenerManagersHash.ops = nullptr;
1.1470 + }
1.1471 + }
1.1472 +
1.1473 + NS_ASSERTION(!sBlockedScriptRunners ||
1.1474 + sBlockedScriptRunners->Length() == 0,
1.1475 + "How'd this happen?");
1.1476 + delete sBlockedScriptRunners;
1.1477 + sBlockedScriptRunners = nullptr;
1.1478 +
1.1479 + delete sShiftText;
1.1480 + sShiftText = nullptr;
1.1481 + delete sControlText;
1.1482 + sControlText = nullptr;
1.1483 + delete sMetaText;
1.1484 + sMetaText = nullptr;
1.1485 + delete sOSText;
1.1486 + sOSText = nullptr;
1.1487 + delete sAltText;
1.1488 + sAltText = nullptr;
1.1489 + delete sModifierSeparator;
1.1490 + sModifierSeparator = nullptr;
1.1491 +
1.1492 + NS_IF_RELEASE(sSameOriginChecker);
1.1493 +}
1.1494 +
1.1495 +/**
1.1496 + * Checks whether two nodes come from the same origin. aTrustedNode is
1.1497 + * considered 'safe' in that a user can operate on it and that it isn't
1.1498 + * a js-object that implements nsIDOMNode.
1.1499 + * Never call this function with the first node provided by script, it
1.1500 + * must always be known to be a 'real' node!
1.1501 + */
1.1502 +// static
1.1503 +nsresult
1.1504 +nsContentUtils::CheckSameOrigin(const nsINode *aTrustedNode,
1.1505 + nsIDOMNode *aUnTrustedNode)
1.1506 +{
1.1507 + MOZ_ASSERT(aTrustedNode);
1.1508 +
1.1509 + // Make sure it's a real node.
1.1510 + nsCOMPtr<nsINode> unTrustedNode = do_QueryInterface(aUnTrustedNode);
1.1511 + NS_ENSURE_TRUE(unTrustedNode, NS_ERROR_UNEXPECTED);
1.1512 + return CheckSameOrigin(aTrustedNode, unTrustedNode);
1.1513 +}
1.1514 +
1.1515 +nsresult
1.1516 +nsContentUtils::CheckSameOrigin(const nsINode* aTrustedNode,
1.1517 + const nsINode* unTrustedNode)
1.1518 +{
1.1519 + MOZ_ASSERT(aTrustedNode);
1.1520 + MOZ_ASSERT(unTrustedNode);
1.1521 +
1.1522 + bool isSystem = false;
1.1523 + nsresult rv = sSecurityManager->SubjectPrincipalIsSystem(&isSystem);
1.1524 + NS_ENSURE_SUCCESS(rv, rv);
1.1525 +
1.1526 + if (isSystem) {
1.1527 + // we're running as system, grant access to the node.
1.1528 +
1.1529 + return NS_OK;
1.1530 + }
1.1531 +
1.1532 + /*
1.1533 + * Get hold of each node's principal
1.1534 + */
1.1535 +
1.1536 + nsIPrincipal* trustedPrincipal = aTrustedNode->NodePrincipal();
1.1537 + nsIPrincipal* unTrustedPrincipal = unTrustedNode->NodePrincipal();
1.1538 +
1.1539 + if (trustedPrincipal == unTrustedPrincipal) {
1.1540 + return NS_OK;
1.1541 + }
1.1542 +
1.1543 + bool equal;
1.1544 + // XXXbz should we actually have a Subsumes() check here instead? Or perhaps
1.1545 + // a separate method for that, with callers using one or the other?
1.1546 + if (NS_FAILED(trustedPrincipal->Equals(unTrustedPrincipal, &equal)) ||
1.1547 + !equal) {
1.1548 + return NS_ERROR_DOM_PROP_ACCESS_DENIED;
1.1549 + }
1.1550 +
1.1551 + return NS_OK;
1.1552 +}
1.1553 +
1.1554 +// static
1.1555 +bool
1.1556 +nsContentUtils::CanCallerAccess(nsIPrincipal* aSubjectPrincipal,
1.1557 + nsIPrincipal* aPrincipal)
1.1558 +{
1.1559 + bool subsumes;
1.1560 + nsresult rv = aSubjectPrincipal->Subsumes(aPrincipal, &subsumes);
1.1561 + NS_ENSURE_SUCCESS(rv, false);
1.1562 +
1.1563 + if (subsumes) {
1.1564 + return true;
1.1565 + }
1.1566 +
1.1567 + // The subject doesn't subsume aPrincipal. Allow access only if the subject
1.1568 + // is chrome.
1.1569 + return IsCallerChrome();
1.1570 +}
1.1571 +
1.1572 +// static
1.1573 +bool
1.1574 +nsContentUtils::CanCallerAccess(nsIDOMNode *aNode)
1.1575 +{
1.1576 + nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
1.1577 + NS_ENSURE_TRUE(node, false);
1.1578 + return CanCallerAccess(node);
1.1579 +}
1.1580 +
1.1581 +// static
1.1582 +bool
1.1583 +nsContentUtils::CanCallerAccess(nsINode* aNode)
1.1584 +{
1.1585 + // XXXbz why not check the IsCapabilityEnabled thing up front, and not bother
1.1586 + // with the system principal games? But really, there should be a simpler
1.1587 + // API here, dammit.
1.1588 + nsCOMPtr<nsIPrincipal> subjectPrincipal;
1.1589 + nsresult rv = sSecurityManager->GetSubjectPrincipal(getter_AddRefs(subjectPrincipal));
1.1590 + NS_ENSURE_SUCCESS(rv, false);
1.1591 +
1.1592 + if (!subjectPrincipal) {
1.1593 + // we're running as system, grant access to the node.
1.1594 +
1.1595 + return true;
1.1596 + }
1.1597 +
1.1598 + return CanCallerAccess(subjectPrincipal, aNode->NodePrincipal());
1.1599 +}
1.1600 +
1.1601 +// static
1.1602 +bool
1.1603 +nsContentUtils::CanCallerAccess(nsPIDOMWindow* aWindow)
1.1604 +{
1.1605 + // XXXbz why not check the IsCapabilityEnabled thing up front, and not bother
1.1606 + // with the system principal games? But really, there should be a simpler
1.1607 + // API here, dammit.
1.1608 + nsCOMPtr<nsIPrincipal> subjectPrincipal;
1.1609 + nsresult rv = sSecurityManager->GetSubjectPrincipal(getter_AddRefs(subjectPrincipal));
1.1610 + NS_ENSURE_SUCCESS(rv, false);
1.1611 +
1.1612 + if (!subjectPrincipal) {
1.1613 + // we're running as system, grant access to the node.
1.1614 +
1.1615 + return true;
1.1616 + }
1.1617 +
1.1618 + nsCOMPtr<nsIScriptObjectPrincipal> scriptObject =
1.1619 + do_QueryInterface(aWindow->IsOuterWindow() ?
1.1620 + aWindow->GetCurrentInnerWindow() : aWindow);
1.1621 + NS_ENSURE_TRUE(scriptObject, false);
1.1622 +
1.1623 + return CanCallerAccess(subjectPrincipal, scriptObject->GetPrincipal());
1.1624 +}
1.1625 +
1.1626 +//static
1.1627 +bool
1.1628 +nsContentUtils::InProlog(nsINode *aNode)
1.1629 +{
1.1630 + NS_PRECONDITION(aNode, "missing node to nsContentUtils::InProlog");
1.1631 +
1.1632 + nsINode* parent = aNode->GetParentNode();
1.1633 + if (!parent || !parent->IsNodeOfType(nsINode::eDOCUMENT)) {
1.1634 + return false;
1.1635 + }
1.1636 +
1.1637 + nsIDocument* doc = static_cast<nsIDocument*>(parent);
1.1638 + nsIContent* root = doc->GetRootElement();
1.1639 +
1.1640 + return !root || doc->IndexOf(aNode) < doc->IndexOf(root);
1.1641 +}
1.1642 +
1.1643 +JSContext *
1.1644 +nsContentUtils::GetContextFromDocument(nsIDocument *aDocument)
1.1645 +{
1.1646 + nsCOMPtr<nsIScriptGlobalObject> sgo = do_QueryInterface(aDocument->GetScopeObject());
1.1647 + if (!sgo) {
1.1648 + // No script global, no context.
1.1649 + return nullptr;
1.1650 + }
1.1651 +
1.1652 + nsIScriptContext *scx = sgo->GetContext();
1.1653 + if (!scx) {
1.1654 + // No context left in the scope...
1.1655 + return nullptr;
1.1656 + }
1.1657 +
1.1658 + return scx->GetNativeContext();
1.1659 +}
1.1660 +
1.1661 +//static
1.1662 +void
1.1663 +nsContentUtils::TraceSafeJSContext(JSTracer* aTrc)
1.1664 +{
1.1665 + JSContext* cx = GetSafeJSContext();
1.1666 + if (!cx) {
1.1667 + return;
1.1668 + }
1.1669 + if (JSObject* global = js::DefaultObjectForContextOrNull(cx)) {
1.1670 + JS::AssertGCThingMustBeTenured(global);
1.1671 + JS_CallObjectTracer(aTrc, &global, "safe context");
1.1672 + MOZ_ASSERT(global == js::DefaultObjectForContextOrNull(cx));
1.1673 + }
1.1674 +}
1.1675 +
1.1676 +nsPIDOMWindow *
1.1677 +nsContentUtils::GetWindowFromCaller()
1.1678 +{
1.1679 + JSContext *cx = GetCurrentJSContext();
1.1680 + if (cx) {
1.1681 + nsCOMPtr<nsPIDOMWindow> win =
1.1682 + do_QueryInterface(nsJSUtils::GetDynamicScriptGlobal(cx));
1.1683 + return win;
1.1684 + }
1.1685 +
1.1686 + return nullptr;
1.1687 +}
1.1688 +
1.1689 +nsIDocument*
1.1690 +nsContentUtils::GetDocumentFromCaller()
1.1691 +{
1.1692 + AutoJSContext cx;
1.1693 +
1.1694 + nsCOMPtr<nsPIDOMWindow> win =
1.1695 + do_QueryInterface(nsJSUtils::GetStaticScriptGlobal(JS::CurrentGlobalOrNull(cx)));
1.1696 + if (!win) {
1.1697 + return nullptr;
1.1698 + }
1.1699 +
1.1700 + return win->GetExtantDoc();
1.1701 +}
1.1702 +
1.1703 +nsIDocument*
1.1704 +nsContentUtils::GetDocumentFromContext()
1.1705 +{
1.1706 + JSContext *cx = GetCurrentJSContext();
1.1707 + if (cx) {
1.1708 + nsIScriptGlobalObject *sgo = nsJSUtils::GetDynamicScriptGlobal(cx);
1.1709 +
1.1710 + if (sgo) {
1.1711 + nsCOMPtr<nsPIDOMWindow> pwin = do_QueryInterface(sgo);
1.1712 + if (pwin) {
1.1713 + return pwin->GetExtantDoc();
1.1714 + }
1.1715 + }
1.1716 + }
1.1717 +
1.1718 + return nullptr;
1.1719 +}
1.1720 +
1.1721 +bool
1.1722 +nsContentUtils::IsCallerChrome()
1.1723 +{
1.1724 + MOZ_ASSERT(NS_IsMainThread());
1.1725 + bool is_caller_chrome = false;
1.1726 + nsresult rv = sSecurityManager->SubjectPrincipalIsSystem(&is_caller_chrome);
1.1727 + if (NS_FAILED(rv)) {
1.1728 + return false;
1.1729 + }
1.1730 + if (is_caller_chrome) {
1.1731 + return true;
1.1732 + }
1.1733 +
1.1734 + // If the check failed, look for UniversalXPConnect on the cx compartment.
1.1735 + return xpc::IsUniversalXPConnectEnabled(GetCurrentJSContext());
1.1736 +}
1.1737 +
1.1738 +namespace mozilla {
1.1739 +namespace dom {
1.1740 +namespace workers {
1.1741 +extern bool IsCurrentThreadRunningChromeWorker();
1.1742 +extern JSContext* GetCurrentThreadJSContext();
1.1743 +}
1.1744 +}
1.1745 +}
1.1746 +
1.1747 +bool
1.1748 +nsContentUtils::ThreadsafeIsCallerChrome()
1.1749 +{
1.1750 + return NS_IsMainThread() ?
1.1751 + IsCallerChrome() :
1.1752 + mozilla::dom::workers::IsCurrentThreadRunningChromeWorker();
1.1753 +}
1.1754 +
1.1755 +bool
1.1756 +nsContentUtils::IsCallerXBL()
1.1757 +{
1.1758 + JSContext *cx = GetCurrentJSContext();
1.1759 + if (!cx)
1.1760 + return false;
1.1761 +
1.1762 + JSCompartment *c = js::GetContextCompartment(cx);
1.1763 +
1.1764 + // For remote XUL, we run XBL in the XUL scope. Given that we care about
1.1765 + // compat and not security for remote XUL, just always claim to be XBL.
1.1766 + if (!xpc::AllowXBLScope(c)) {
1.1767 + MOZ_ASSERT(nsContentUtils::AllowXULXBLForPrincipal(xpc::GetCompartmentPrincipal(c)));
1.1768 + return true;
1.1769 + }
1.1770 +
1.1771 + return xpc::IsXBLScope(c);
1.1772 +}
1.1773 +
1.1774 +
1.1775 +bool
1.1776 +nsContentUtils::IsImageSrcSetDisabled()
1.1777 +{
1.1778 + return Preferences::GetBool("dom.disable_image_src_set") &&
1.1779 + !IsCallerChrome();
1.1780 +}
1.1781 +
1.1782 +// static
1.1783 +bool
1.1784 +nsContentUtils::LookupBindingMember(JSContext* aCx, nsIContent *aContent,
1.1785 + JS::Handle<jsid> aId,
1.1786 + JS::MutableHandle<JSPropertyDescriptor> aDesc)
1.1787 +{
1.1788 + nsXBLBinding* binding = aContent->GetXBLBinding();
1.1789 + if (!binding)
1.1790 + return true;
1.1791 + return binding->LookupMember(aCx, aId, aDesc);
1.1792 +}
1.1793 +
1.1794 +// static
1.1795 +nsINode*
1.1796 +nsContentUtils::GetCrossDocParentNode(nsINode* aChild)
1.1797 +{
1.1798 + NS_PRECONDITION(aChild, "The child is null!");
1.1799 +
1.1800 + nsINode* parent = aChild->GetParentNode();
1.1801 + if (parent || !aChild->IsNodeOfType(nsINode::eDOCUMENT))
1.1802 + return parent;
1.1803 +
1.1804 + nsIDocument* doc = static_cast<nsIDocument*>(aChild);
1.1805 + nsIDocument* parentDoc = doc->GetParentDocument();
1.1806 + return parentDoc ? parentDoc->FindContentForSubDocument(doc) : nullptr;
1.1807 +}
1.1808 +
1.1809 +// static
1.1810 +bool
1.1811 +nsContentUtils::ContentIsDescendantOf(const nsINode* aPossibleDescendant,
1.1812 + const nsINode* aPossibleAncestor)
1.1813 +{
1.1814 + NS_PRECONDITION(aPossibleDescendant, "The possible descendant is null!");
1.1815 + NS_PRECONDITION(aPossibleAncestor, "The possible ancestor is null!");
1.1816 +
1.1817 + do {
1.1818 + if (aPossibleDescendant == aPossibleAncestor)
1.1819 + return true;
1.1820 + aPossibleDescendant = aPossibleDescendant->GetParentNode();
1.1821 + } while (aPossibleDescendant);
1.1822 +
1.1823 + return false;
1.1824 +}
1.1825 +
1.1826 +bool
1.1827 +nsContentUtils::ContentIsHostIncludingDescendantOf(
1.1828 + const nsINode* aPossibleDescendant, const nsINode* aPossibleAncestor)
1.1829 +{
1.1830 + NS_PRECONDITION(aPossibleDescendant, "The possible descendant is null!");
1.1831 + NS_PRECONDITION(aPossibleAncestor, "The possible ancestor is null!");
1.1832 +
1.1833 + do {
1.1834 + if (aPossibleDescendant == aPossibleAncestor)
1.1835 + return true;
1.1836 + if (aPossibleDescendant->NodeType() == nsIDOMNode::DOCUMENT_FRAGMENT_NODE) {
1.1837 + aPossibleDescendant =
1.1838 + static_cast<const DocumentFragment*>(aPossibleDescendant)->GetHost();
1.1839 + } else {
1.1840 + aPossibleDescendant = aPossibleDescendant->GetParentNode();
1.1841 + }
1.1842 + } while (aPossibleDescendant);
1.1843 +
1.1844 + return false;
1.1845 +}
1.1846 +
1.1847 +// static
1.1848 +bool
1.1849 +nsContentUtils::ContentIsCrossDocDescendantOf(nsINode* aPossibleDescendant,
1.1850 + nsINode* aPossibleAncestor)
1.1851 +{
1.1852 + NS_PRECONDITION(aPossibleDescendant, "The possible descendant is null!");
1.1853 + NS_PRECONDITION(aPossibleAncestor, "The possible ancestor is null!");
1.1854 +
1.1855 + do {
1.1856 + if (aPossibleDescendant == aPossibleAncestor)
1.1857 + return true;
1.1858 + aPossibleDescendant = GetCrossDocParentNode(aPossibleDescendant);
1.1859 + } while (aPossibleDescendant);
1.1860 +
1.1861 + return false;
1.1862 +}
1.1863 +
1.1864 +
1.1865 +// static
1.1866 +nsresult
1.1867 +nsContentUtils::GetAncestors(nsINode* aNode,
1.1868 + nsTArray<nsINode*>& aArray)
1.1869 +{
1.1870 + while (aNode) {
1.1871 + aArray.AppendElement(aNode);
1.1872 + aNode = aNode->GetParentNode();
1.1873 + }
1.1874 + return NS_OK;
1.1875 +}
1.1876 +
1.1877 +// static
1.1878 +nsresult
1.1879 +nsContentUtils::GetAncestorsAndOffsets(nsIDOMNode* aNode,
1.1880 + int32_t aOffset,
1.1881 + nsTArray<nsIContent*>* aAncestorNodes,
1.1882 + nsTArray<int32_t>* aAncestorOffsets)
1.1883 +{
1.1884 + NS_ENSURE_ARG_POINTER(aNode);
1.1885 +
1.1886 + nsCOMPtr<nsIContent> content(do_QueryInterface(aNode));
1.1887 +
1.1888 + if (!content) {
1.1889 + return NS_ERROR_FAILURE;
1.1890 + }
1.1891 +
1.1892 + if (!aAncestorNodes->IsEmpty()) {
1.1893 + NS_WARNING("aAncestorNodes is not empty");
1.1894 + aAncestorNodes->Clear();
1.1895 + }
1.1896 +
1.1897 + if (!aAncestorOffsets->IsEmpty()) {
1.1898 + NS_WARNING("aAncestorOffsets is not empty");
1.1899 + aAncestorOffsets->Clear();
1.1900 + }
1.1901 +
1.1902 + // insert the node itself
1.1903 + aAncestorNodes->AppendElement(content.get());
1.1904 + aAncestorOffsets->AppendElement(aOffset);
1.1905 +
1.1906 + // insert all the ancestors
1.1907 + nsIContent* child = content;
1.1908 + nsIContent* parent = child->GetParent();
1.1909 + while (parent) {
1.1910 + aAncestorNodes->AppendElement(parent);
1.1911 + aAncestorOffsets->AppendElement(parent->IndexOf(child));
1.1912 + child = parent;
1.1913 + parent = parent->GetParent();
1.1914 + }
1.1915 +
1.1916 + return NS_OK;
1.1917 +}
1.1918 +
1.1919 +// static
1.1920 +nsresult
1.1921 +nsContentUtils::GetCommonAncestor(nsIDOMNode *aNode,
1.1922 + nsIDOMNode *aOther,
1.1923 + nsIDOMNode** aCommonAncestor)
1.1924 +{
1.1925 + *aCommonAncestor = nullptr;
1.1926 +
1.1927 + nsCOMPtr<nsINode> node1 = do_QueryInterface(aNode);
1.1928 + nsCOMPtr<nsINode> node2 = do_QueryInterface(aOther);
1.1929 +
1.1930 + NS_ENSURE_TRUE(node1 && node2, NS_ERROR_UNEXPECTED);
1.1931 +
1.1932 + nsINode* common = GetCommonAncestor(node1, node2);
1.1933 + NS_ENSURE_TRUE(common, NS_ERROR_NOT_AVAILABLE);
1.1934 +
1.1935 + return CallQueryInterface(common, aCommonAncestor);
1.1936 +}
1.1937 +
1.1938 +// static
1.1939 +nsINode*
1.1940 +nsContentUtils::GetCommonAncestor(nsINode* aNode1,
1.1941 + nsINode* aNode2)
1.1942 +{
1.1943 + if (aNode1 == aNode2) {
1.1944 + return aNode1;
1.1945 + }
1.1946 +
1.1947 + // Build the chain of parents
1.1948 + nsAutoTArray<nsINode*, 30> parents1, parents2;
1.1949 + do {
1.1950 + parents1.AppendElement(aNode1);
1.1951 + aNode1 = aNode1->GetParentNode();
1.1952 + } while (aNode1);
1.1953 + do {
1.1954 + parents2.AppendElement(aNode2);
1.1955 + aNode2 = aNode2->GetParentNode();
1.1956 + } while (aNode2);
1.1957 +
1.1958 + // Find where the parent chain differs
1.1959 + uint32_t pos1 = parents1.Length();
1.1960 + uint32_t pos2 = parents2.Length();
1.1961 + nsINode* parent = nullptr;
1.1962 + uint32_t len;
1.1963 + for (len = std::min(pos1, pos2); len > 0; --len) {
1.1964 + nsINode* child1 = parents1.ElementAt(--pos1);
1.1965 + nsINode* child2 = parents2.ElementAt(--pos2);
1.1966 + if (child1 != child2) {
1.1967 + break;
1.1968 + }
1.1969 + parent = child1;
1.1970 + }
1.1971 +
1.1972 + return parent;
1.1973 +}
1.1974 +
1.1975 +/* static */
1.1976 +bool
1.1977 +nsContentUtils::PositionIsBefore(nsINode* aNode1, nsINode* aNode2)
1.1978 +{
1.1979 + return (aNode2->CompareDocumentPosition(*aNode1) &
1.1980 + (nsIDOMNode::DOCUMENT_POSITION_PRECEDING |
1.1981 + nsIDOMNode::DOCUMENT_POSITION_DISCONNECTED)) ==
1.1982 + nsIDOMNode::DOCUMENT_POSITION_PRECEDING;
1.1983 +}
1.1984 +
1.1985 +/* static */
1.1986 +int32_t
1.1987 +nsContentUtils::ComparePoints(nsINode* aParent1, int32_t aOffset1,
1.1988 + nsINode* aParent2, int32_t aOffset2,
1.1989 + bool* aDisconnected)
1.1990 +{
1.1991 + if (aParent1 == aParent2) {
1.1992 + return aOffset1 < aOffset2 ? -1 :
1.1993 + aOffset1 > aOffset2 ? 1 :
1.1994 + 0;
1.1995 + }
1.1996 +
1.1997 + nsAutoTArray<nsINode*, 32> parents1, parents2;
1.1998 + nsINode* node1 = aParent1;
1.1999 + nsINode* node2 = aParent2;
1.2000 + do {
1.2001 + parents1.AppendElement(node1);
1.2002 + node1 = node1->GetParentNode();
1.2003 + } while (node1);
1.2004 + do {
1.2005 + parents2.AppendElement(node2);
1.2006 + node2 = node2->GetParentNode();
1.2007 + } while (node2);
1.2008 +
1.2009 + uint32_t pos1 = parents1.Length() - 1;
1.2010 + uint32_t pos2 = parents2.Length() - 1;
1.2011 +
1.2012 + bool disconnected = parents1.ElementAt(pos1) != parents2.ElementAt(pos2);
1.2013 + if (aDisconnected) {
1.2014 + *aDisconnected = disconnected;
1.2015 + }
1.2016 + if (disconnected) {
1.2017 + NS_ASSERTION(aDisconnected, "unexpected disconnected nodes");
1.2018 + return 1;
1.2019 + }
1.2020 +
1.2021 + // Find where the parent chains differ
1.2022 + nsINode* parent = parents1.ElementAt(pos1);
1.2023 + uint32_t len;
1.2024 + for (len = std::min(pos1, pos2); len > 0; --len) {
1.2025 + nsINode* child1 = parents1.ElementAt(--pos1);
1.2026 + nsINode* child2 = parents2.ElementAt(--pos2);
1.2027 + if (child1 != child2) {
1.2028 + return parent->IndexOf(child1) < parent->IndexOf(child2) ? -1 : 1;
1.2029 + }
1.2030 + parent = child1;
1.2031 + }
1.2032 +
1.2033 +
1.2034 + // The parent chains never differed, so one of the nodes is an ancestor of
1.2035 + // the other
1.2036 +
1.2037 + NS_ASSERTION(!pos1 || !pos2,
1.2038 + "should have run out of parent chain for one of the nodes");
1.2039 +
1.2040 + if (!pos1) {
1.2041 + nsINode* child2 = parents2.ElementAt(--pos2);
1.2042 + return aOffset1 <= parent->IndexOf(child2) ? -1 : 1;
1.2043 + }
1.2044 +
1.2045 + nsINode* child1 = parents1.ElementAt(--pos1);
1.2046 + return parent->IndexOf(child1) < aOffset2 ? -1 : 1;
1.2047 +}
1.2048 +
1.2049 +/* static */
1.2050 +int32_t
1.2051 +nsContentUtils::ComparePoints(nsIDOMNode* aParent1, int32_t aOffset1,
1.2052 + nsIDOMNode* aParent2, int32_t aOffset2,
1.2053 + bool* aDisconnected)
1.2054 +{
1.2055 + nsCOMPtr<nsINode> parent1 = do_QueryInterface(aParent1);
1.2056 + nsCOMPtr<nsINode> parent2 = do_QueryInterface(aParent2);
1.2057 + NS_ENSURE_TRUE(parent1 && parent2, -1);
1.2058 + return ComparePoints(parent1, aOffset1, parent2, aOffset2);
1.2059 +}
1.2060 +
1.2061 +inline bool
1.2062 +IsCharInSet(const char* aSet,
1.2063 + const char16_t aChar)
1.2064 +{
1.2065 + char16_t ch;
1.2066 + while ((ch = *aSet)) {
1.2067 + if (aChar == char16_t(ch)) {
1.2068 + return true;
1.2069 + }
1.2070 + ++aSet;
1.2071 + }
1.2072 + return false;
1.2073 +}
1.2074 +
1.2075 +/**
1.2076 + * This method strips leading/trailing chars, in given set, from string.
1.2077 + */
1.2078 +
1.2079 +// static
1.2080 +const nsDependentSubstring
1.2081 +nsContentUtils::TrimCharsInSet(const char* aSet,
1.2082 + const nsAString& aValue)
1.2083 +{
1.2084 + nsAString::const_iterator valueCurrent, valueEnd;
1.2085 +
1.2086 + aValue.BeginReading(valueCurrent);
1.2087 + aValue.EndReading(valueEnd);
1.2088 +
1.2089 + // Skip characters in the beginning
1.2090 + while (valueCurrent != valueEnd) {
1.2091 + if (!IsCharInSet(aSet, *valueCurrent)) {
1.2092 + break;
1.2093 + }
1.2094 + ++valueCurrent;
1.2095 + }
1.2096 +
1.2097 + if (valueCurrent != valueEnd) {
1.2098 + for (;;) {
1.2099 + --valueEnd;
1.2100 + if (!IsCharInSet(aSet, *valueEnd)) {
1.2101 + break;
1.2102 + }
1.2103 + }
1.2104 + ++valueEnd; // Step beyond the last character we want in the value.
1.2105 + }
1.2106 +
1.2107 + // valueEnd should point to the char after the last to copy
1.2108 + return Substring(valueCurrent, valueEnd);
1.2109 +}
1.2110 +
1.2111 +/**
1.2112 + * This method strips leading and trailing whitespace from a string.
1.2113 + */
1.2114 +
1.2115 +// static
1.2116 +template<bool IsWhitespace(char16_t)>
1.2117 +const nsDependentSubstring
1.2118 +nsContentUtils::TrimWhitespace(const nsAString& aStr, bool aTrimTrailing)
1.2119 +{
1.2120 + nsAString::const_iterator start, end;
1.2121 +
1.2122 + aStr.BeginReading(start);
1.2123 + aStr.EndReading(end);
1.2124 +
1.2125 + // Skip whitespace characters in the beginning
1.2126 + while (start != end && IsWhitespace(*start)) {
1.2127 + ++start;
1.2128 + }
1.2129 +
1.2130 + if (aTrimTrailing) {
1.2131 + // Skip whitespace characters in the end.
1.2132 + while (end != start) {
1.2133 + --end;
1.2134 +
1.2135 + if (!IsWhitespace(*end)) {
1.2136 + // Step back to the last non-whitespace character.
1.2137 + ++end;
1.2138 +
1.2139 + break;
1.2140 + }
1.2141 + }
1.2142 + }
1.2143 +
1.2144 + // Return a substring for the string w/o leading and/or trailing
1.2145 + // whitespace
1.2146 +
1.2147 + return Substring(start, end);
1.2148 +}
1.2149 +
1.2150 +// Declaring the templates we are going to use avoid linking issues without
1.2151 +// inlining the method. Considering there is not so much spaces checking
1.2152 +// methods we can consider this to be better than inlining.
1.2153 +template
1.2154 +const nsDependentSubstring
1.2155 +nsContentUtils::TrimWhitespace<nsCRT::IsAsciiSpace>(const nsAString&, bool);
1.2156 +template
1.2157 +const nsDependentSubstring
1.2158 +nsContentUtils::TrimWhitespace<nsContentUtils::IsHTMLWhitespace>(const nsAString&, bool);
1.2159 +template
1.2160 +const nsDependentSubstring
1.2161 +nsContentUtils::TrimWhitespace<nsContentUtils::IsHTMLWhitespaceOrNBSP>(const nsAString&, bool);
1.2162 +
1.2163 +static inline void KeyAppendSep(nsACString& aKey)
1.2164 +{
1.2165 + if (!aKey.IsEmpty()) {
1.2166 + aKey.Append('>');
1.2167 + }
1.2168 +}
1.2169 +
1.2170 +static inline void KeyAppendString(const nsAString& aString, nsACString& aKey)
1.2171 +{
1.2172 + KeyAppendSep(aKey);
1.2173 +
1.2174 + // Could escape separator here if collisions happen. > is not a legal char
1.2175 + // for a name or type attribute, so we should be safe avoiding that extra work.
1.2176 +
1.2177 + AppendUTF16toUTF8(aString, aKey);
1.2178 +}
1.2179 +
1.2180 +static inline void KeyAppendString(const nsACString& aString, nsACString& aKey)
1.2181 +{
1.2182 + KeyAppendSep(aKey);
1.2183 +
1.2184 + // Could escape separator here if collisions happen. > is not a legal char
1.2185 + // for a name or type attribute, so we should be safe avoiding that extra work.
1.2186 +
1.2187 + aKey.Append(aString);
1.2188 +}
1.2189 +
1.2190 +static inline void KeyAppendInt(int32_t aInt, nsACString& aKey)
1.2191 +{
1.2192 + KeyAppendSep(aKey);
1.2193 +
1.2194 + aKey.Append(nsPrintfCString("%d", aInt));
1.2195 +}
1.2196 +
1.2197 +static inline bool IsAutocompleteOff(const nsIContent* aElement)
1.2198 +{
1.2199 + return aElement->AttrValueIs(kNameSpaceID_None, nsGkAtoms::autocomplete,
1.2200 + NS_LITERAL_STRING("off"), eIgnoreCase);
1.2201 +}
1.2202 +
1.2203 +/*static*/ nsresult
1.2204 +nsContentUtils::GenerateStateKey(nsIContent* aContent,
1.2205 + const nsIDocument* aDocument,
1.2206 + nsACString& aKey)
1.2207 +{
1.2208 + aKey.Truncate();
1.2209 +
1.2210 + uint32_t partID = aDocument ? aDocument->GetPartID() : 0;
1.2211 +
1.2212 + // We must have content if we're not using a special state id
1.2213 + NS_ENSURE_TRUE(aContent, NS_ERROR_FAILURE);
1.2214 +
1.2215 + // Don't capture state for anonymous content
1.2216 + if (aContent->IsInAnonymousSubtree()) {
1.2217 + return NS_OK;
1.2218 + }
1.2219 +
1.2220 + if (IsAutocompleteOff(aContent)) {
1.2221 + return NS_OK;
1.2222 + }
1.2223 +
1.2224 + nsCOMPtr<nsIHTMLDocument> htmlDocument(do_QueryInterface(aContent->GetCurrentDoc()));
1.2225 +
1.2226 + KeyAppendInt(partID, aKey); // first append a partID
1.2227 + bool generatedUniqueKey = false;
1.2228 +
1.2229 + if (htmlDocument) {
1.2230 + // Flush our content model so it'll be up to date
1.2231 + // If this becomes unnecessary and the following line is removed,
1.2232 + // please also remove the corresponding flush operation from
1.2233 + // nsHtml5TreeBuilderCppSupplement.h. (Look for "See bug 497861." there.)
1.2234 + aContent->GetCurrentDoc()->FlushPendingNotifications(Flush_Content);
1.2235 +
1.2236 + nsContentList *htmlForms = htmlDocument->GetForms();
1.2237 + nsContentList *htmlFormControls = htmlDocument->GetFormControls();
1.2238 +
1.2239 + NS_ENSURE_TRUE(htmlForms && htmlFormControls, NS_ERROR_OUT_OF_MEMORY);
1.2240 +
1.2241 + // If we have a form control and can calculate form information, use that
1.2242 + // as the key - it is more reliable than just recording position in the
1.2243 + // DOM.
1.2244 + // XXXbz Is it, really? We have bugs on this, I think...
1.2245 + // Important to have a unique key, and tag/type/name may not be.
1.2246 + //
1.2247 + // If the control has a form, the format of the key is:
1.2248 + // f>type>IndOfFormInDoc>IndOfControlInForm>FormName>name
1.2249 + // else:
1.2250 + // d>type>IndOfControlInDoc>name
1.2251 + //
1.2252 + // XXX We don't need to use index if name is there
1.2253 + // XXXbz We don't? Why not? I don't follow.
1.2254 + //
1.2255 + nsCOMPtr<nsIFormControl> control(do_QueryInterface(aContent));
1.2256 + if (control && htmlFormControls && htmlForms) {
1.2257 +
1.2258 + // Append the control type
1.2259 + KeyAppendInt(control->GetType(), aKey);
1.2260 +
1.2261 + // If in a form, add form name / index of form / index in form
1.2262 + int32_t index = -1;
1.2263 + Element *formElement = control->GetFormElement();
1.2264 + if (formElement) {
1.2265 + if (IsAutocompleteOff(formElement)) {
1.2266 + aKey.Truncate();
1.2267 + return NS_OK;
1.2268 + }
1.2269 +
1.2270 + KeyAppendString(NS_LITERAL_CSTRING("f"), aKey);
1.2271 +
1.2272 + // Append the index of the form in the document
1.2273 + index = htmlForms->IndexOf(formElement, false);
1.2274 + if (index <= -1) {
1.2275 + //
1.2276 + // XXX HACK this uses some state that was dumped into the document
1.2277 + // specifically to fix bug 138892. What we are trying to do is *guess*
1.2278 + // which form this control's state is found in, with the highly likely
1.2279 + // guess that the highest form parsed so far is the one.
1.2280 + // This code should not be on trunk, only branch.
1.2281 + //
1.2282 + index = htmlDocument->GetNumFormsSynchronous() - 1;
1.2283 + }
1.2284 + if (index > -1) {
1.2285 + KeyAppendInt(index, aKey);
1.2286 +
1.2287 + // Append the index of the control in the form
1.2288 + nsCOMPtr<nsIForm> form(do_QueryInterface(formElement));
1.2289 + index = form->IndexOfControl(control);
1.2290 +
1.2291 + if (index > -1) {
1.2292 + KeyAppendInt(index, aKey);
1.2293 + generatedUniqueKey = true;
1.2294 + }
1.2295 + }
1.2296 +
1.2297 + // Append the form name
1.2298 + nsAutoString formName;
1.2299 + formElement->GetAttr(kNameSpaceID_None, nsGkAtoms::name, formName);
1.2300 + KeyAppendString(formName, aKey);
1.2301 +
1.2302 + } else {
1.2303 +
1.2304 + KeyAppendString(NS_LITERAL_CSTRING("d"), aKey);
1.2305 +
1.2306 + // If not in a form, add index of control in document
1.2307 + // Less desirable than indexing by form info.
1.2308 +
1.2309 + // Hash by index of control in doc (we are not in a form)
1.2310 + // These are important as they are unique, and type/name may not be.
1.2311 +
1.2312 + // We have to flush sink notifications at this point to make
1.2313 + // sure that htmlFormControls is up to date.
1.2314 + index = htmlFormControls->IndexOf(aContent, true);
1.2315 + if (index > -1) {
1.2316 + KeyAppendInt(index, aKey);
1.2317 + generatedUniqueKey = true;
1.2318 + }
1.2319 + }
1.2320 +
1.2321 + // Append the control name
1.2322 + nsAutoString name;
1.2323 + aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::name, name);
1.2324 + KeyAppendString(name, aKey);
1.2325 + }
1.2326 + }
1.2327 +
1.2328 + if (!generatedUniqueKey) {
1.2329 + // Either we didn't have a form control or we aren't in an HTML document so
1.2330 + // we can't figure out form info. Append the tag name if it's an element
1.2331 + // to avoid restoring state for one type of element on another type.
1.2332 + if (aContent->IsElement()) {
1.2333 + KeyAppendString(nsDependentAtomString(aContent->Tag()), aKey);
1.2334 + }
1.2335 + else {
1.2336 + // Append a character that is not "d" or "f" to disambiguate from
1.2337 + // the case when we were a form control in an HTML document.
1.2338 + KeyAppendString(NS_LITERAL_CSTRING("o"), aKey);
1.2339 + }
1.2340 +
1.2341 + // Now start at aContent and append the indices of it and all its ancestors
1.2342 + // in their containers. That should at least pin down its position in the
1.2343 + // DOM...
1.2344 + nsINode* parent = aContent->GetParentNode();
1.2345 + nsINode* content = aContent;
1.2346 + while (parent) {
1.2347 + KeyAppendInt(parent->IndexOf(content), aKey);
1.2348 + content = parent;
1.2349 + parent = content->GetParentNode();
1.2350 + }
1.2351 + }
1.2352 +
1.2353 + return NS_OK;
1.2354 +}
1.2355 +
1.2356 +// static
1.2357 +nsIPrincipal*
1.2358 +nsContentUtils::GetSubjectPrincipal()
1.2359 +{
1.2360 + nsCOMPtr<nsIPrincipal> subject;
1.2361 + sSecurityManager->GetSubjectPrincipal(getter_AddRefs(subject));
1.2362 +
1.2363 + // When the ssm says the subject is null, that means system principal.
1.2364 + if (!subject)
1.2365 + sSecurityManager->GetSystemPrincipal(getter_AddRefs(subject));
1.2366 +
1.2367 + return subject;
1.2368 +}
1.2369 +
1.2370 +// static
1.2371 +nsIPrincipal*
1.2372 +nsContentUtils::GetObjectPrincipal(JSObject* aObj)
1.2373 +{
1.2374 + // This is duplicated from nsScriptSecurityManager. We don't call through there
1.2375 + // because the API unnecessarily requires a JSContext for historical reasons.
1.2376 + JSCompartment *compartment = js::GetObjectCompartment(aObj);
1.2377 + JSPrincipals *principals = JS_GetCompartmentPrincipals(compartment);
1.2378 + return nsJSPrincipals::get(principals);
1.2379 +}
1.2380 +
1.2381 +// static
1.2382 +nsresult
1.2383 +nsContentUtils::NewURIWithDocumentCharset(nsIURI** aResult,
1.2384 + const nsAString& aSpec,
1.2385 + nsIDocument* aDocument,
1.2386 + nsIURI* aBaseURI)
1.2387 +{
1.2388 + return NS_NewURI(aResult, aSpec,
1.2389 + aDocument ? aDocument->GetDocumentCharacterSet().get() : nullptr,
1.2390 + aBaseURI, sIOService);
1.2391 +}
1.2392 +
1.2393 +// static
1.2394 +bool
1.2395 +nsContentUtils::IsCustomElementName(nsIAtom* aName)
1.2396 +{
1.2397 + // The custom element name identifies a custom element and is a sequence of
1.2398 + // alphanumeric ASCII characters that must match the NCName production and
1.2399 + // contain a U+002D HYPHEN-MINUS character.
1.2400 + nsDependentAtomString str(aName);
1.2401 + const char16_t* colon;
1.2402 + if (NS_FAILED(nsContentUtils::CheckQName(str, false, &colon)) || colon ||
1.2403 + str.FindChar('-') == -1) {
1.2404 + return false;
1.2405 + }
1.2406 +
1.2407 + // The custom element name must not be one of the following values:
1.2408 + // annotation-xml
1.2409 + // color-profile
1.2410 + // font-face
1.2411 + // font-face-src
1.2412 + // font-face-uri
1.2413 + // font-face-format
1.2414 + // font-face-name
1.2415 + // missing-glyph
1.2416 + return aName != nsGkAtoms::annotation_xml_ &&
1.2417 + aName != nsGkAtoms::colorProfile &&
1.2418 + aName != nsGkAtoms::font_face &&
1.2419 + aName != nsGkAtoms::font_face_src &&
1.2420 + aName != nsGkAtoms::font_face_uri &&
1.2421 + aName != nsGkAtoms::font_face_format &&
1.2422 + aName != nsGkAtoms::font_face_name &&
1.2423 + aName != nsGkAtoms::missingGlyph;
1.2424 +}
1.2425 +
1.2426 +// static
1.2427 +nsresult
1.2428 +nsContentUtils::CheckQName(const nsAString& aQualifiedName,
1.2429 + bool aNamespaceAware,
1.2430 + const char16_t** aColon)
1.2431 +{
1.2432 + const char* colon = nullptr;
1.2433 + const char16_t* begin = aQualifiedName.BeginReading();
1.2434 + const char16_t* end = aQualifiedName.EndReading();
1.2435 +
1.2436 + int result = MOZ_XMLCheckQName(reinterpret_cast<const char*>(begin),
1.2437 + reinterpret_cast<const char*>(end),
1.2438 + aNamespaceAware, &colon);
1.2439 +
1.2440 + if (!result) {
1.2441 + if (aColon) {
1.2442 + *aColon = reinterpret_cast<const char16_t*>(colon);
1.2443 + }
1.2444 +
1.2445 + return NS_OK;
1.2446 + }
1.2447 +
1.2448 + // MOZ_EXPAT_EMPTY_QNAME || MOZ_EXPAT_INVALID_CHARACTER
1.2449 + if (result == (1 << 0) || result == (1 << 1)) {
1.2450 + return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
1.2451 + }
1.2452 +
1.2453 + return NS_ERROR_DOM_NAMESPACE_ERR;
1.2454 +}
1.2455 +
1.2456 +//static
1.2457 +nsresult
1.2458 +nsContentUtils::SplitQName(const nsIContent* aNamespaceResolver,
1.2459 + const nsAFlatString& aQName,
1.2460 + int32_t *aNamespace, nsIAtom **aLocalName)
1.2461 +{
1.2462 + const char16_t* colon;
1.2463 + nsresult rv = nsContentUtils::CheckQName(aQName, true, &colon);
1.2464 + NS_ENSURE_SUCCESS(rv, rv);
1.2465 +
1.2466 + if (colon) {
1.2467 + const char16_t* end;
1.2468 + aQName.EndReading(end);
1.2469 + nsAutoString nameSpace;
1.2470 + rv = aNamespaceResolver->LookupNamespaceURIInternal(Substring(aQName.get(),
1.2471 + colon),
1.2472 + nameSpace);
1.2473 + NS_ENSURE_SUCCESS(rv, rv);
1.2474 +
1.2475 + *aNamespace = NameSpaceManager()->GetNameSpaceID(nameSpace);
1.2476 + if (*aNamespace == kNameSpaceID_Unknown)
1.2477 + return NS_ERROR_FAILURE;
1.2478 +
1.2479 + *aLocalName = NS_NewAtom(Substring(colon + 1, end)).take();
1.2480 + }
1.2481 + else {
1.2482 + *aNamespace = kNameSpaceID_None;
1.2483 + *aLocalName = NS_NewAtom(aQName).take();
1.2484 + }
1.2485 + NS_ENSURE_TRUE(aLocalName, NS_ERROR_OUT_OF_MEMORY);
1.2486 + return NS_OK;
1.2487 +}
1.2488 +
1.2489 +// static
1.2490 +nsresult
1.2491 +nsContentUtils::GetNodeInfoFromQName(const nsAString& aNamespaceURI,
1.2492 + const nsAString& aQualifiedName,
1.2493 + nsNodeInfoManager* aNodeInfoManager,
1.2494 + uint16_t aNodeType,
1.2495 + nsINodeInfo** aNodeInfo)
1.2496 +{
1.2497 + const nsAFlatString& qName = PromiseFlatString(aQualifiedName);
1.2498 + const char16_t* colon;
1.2499 + nsresult rv = nsContentUtils::CheckQName(qName, true, &colon);
1.2500 + NS_ENSURE_SUCCESS(rv, rv);
1.2501 +
1.2502 + int32_t nsID;
1.2503 + sNameSpaceManager->RegisterNameSpace(aNamespaceURI, nsID);
1.2504 + if (colon) {
1.2505 + const char16_t* end;
1.2506 + qName.EndReading(end);
1.2507 +
1.2508 + nsCOMPtr<nsIAtom> prefix = do_GetAtom(Substring(qName.get(), colon));
1.2509 +
1.2510 + rv = aNodeInfoManager->GetNodeInfo(Substring(colon + 1, end), prefix,
1.2511 + nsID, aNodeType, aNodeInfo);
1.2512 + }
1.2513 + else {
1.2514 + rv = aNodeInfoManager->GetNodeInfo(aQualifiedName, nullptr, nsID,
1.2515 + aNodeType, aNodeInfo);
1.2516 + }
1.2517 + NS_ENSURE_SUCCESS(rv, rv);
1.2518 +
1.2519 + return nsContentUtils::IsValidNodeName((*aNodeInfo)->NameAtom(),
1.2520 + (*aNodeInfo)->GetPrefixAtom(),
1.2521 + (*aNodeInfo)->NamespaceID()) ?
1.2522 + NS_OK : NS_ERROR_DOM_NAMESPACE_ERR;
1.2523 +}
1.2524 +
1.2525 +// static
1.2526 +void
1.2527 +nsContentUtils::SplitExpatName(const char16_t *aExpatName, nsIAtom **aPrefix,
1.2528 + nsIAtom **aLocalName, int32_t* aNameSpaceID)
1.2529 +{
1.2530 + /**
1.2531 + * Expat can send the following:
1.2532 + * localName
1.2533 + * namespaceURI<separator>localName
1.2534 + * namespaceURI<separator>localName<separator>prefix
1.2535 + *
1.2536 + * and we use 0xFFFF for the <separator>.
1.2537 + *
1.2538 + */
1.2539 +
1.2540 + const char16_t *uriEnd = nullptr;
1.2541 + const char16_t *nameEnd = nullptr;
1.2542 + const char16_t *pos;
1.2543 + for (pos = aExpatName; *pos; ++pos) {
1.2544 + if (*pos == 0xFFFF) {
1.2545 + if (uriEnd) {
1.2546 + nameEnd = pos;
1.2547 + }
1.2548 + else {
1.2549 + uriEnd = pos;
1.2550 + }
1.2551 + }
1.2552 + }
1.2553 +
1.2554 + const char16_t *nameStart;
1.2555 + if (uriEnd) {
1.2556 + if (sNameSpaceManager) {
1.2557 + sNameSpaceManager->RegisterNameSpace(nsDependentSubstring(aExpatName,
1.2558 + uriEnd),
1.2559 + *aNameSpaceID);
1.2560 + }
1.2561 + else {
1.2562 + *aNameSpaceID = kNameSpaceID_Unknown;
1.2563 + }
1.2564 +
1.2565 + nameStart = (uriEnd + 1);
1.2566 + if (nameEnd) {
1.2567 + const char16_t *prefixStart = nameEnd + 1;
1.2568 + *aPrefix = NS_NewAtom(Substring(prefixStart, pos)).take();
1.2569 + }
1.2570 + else {
1.2571 + nameEnd = pos;
1.2572 + *aPrefix = nullptr;
1.2573 + }
1.2574 + }
1.2575 + else {
1.2576 + *aNameSpaceID = kNameSpaceID_None;
1.2577 + nameStart = aExpatName;
1.2578 + nameEnd = pos;
1.2579 + *aPrefix = nullptr;
1.2580 + }
1.2581 + *aLocalName = NS_NewAtom(Substring(nameStart, nameEnd)).take();
1.2582 +}
1.2583 +
1.2584 +// static
1.2585 +nsPresContext*
1.2586 +nsContentUtils::GetContextForContent(const nsIContent* aContent)
1.2587 +{
1.2588 + nsIDocument* doc = aContent->GetCurrentDoc();
1.2589 + if (doc) {
1.2590 + nsIPresShell *presShell = doc->GetShell();
1.2591 + if (presShell) {
1.2592 + return presShell->GetPresContext();
1.2593 + }
1.2594 + }
1.2595 + return nullptr;
1.2596 +}
1.2597 +
1.2598 +// static
1.2599 +bool
1.2600 +nsContentUtils::CanLoadImage(nsIURI* aURI, nsISupports* aContext,
1.2601 + nsIDocument* aLoadingDocument,
1.2602 + nsIPrincipal* aLoadingPrincipal,
1.2603 + int16_t* aImageBlockingStatus)
1.2604 +{
1.2605 + NS_PRECONDITION(aURI, "Must have a URI");
1.2606 + NS_PRECONDITION(aLoadingDocument, "Must have a document");
1.2607 + NS_PRECONDITION(aLoadingPrincipal, "Must have a loading principal");
1.2608 +
1.2609 + nsresult rv;
1.2610 +
1.2611 + uint32_t appType = nsIDocShell::APP_TYPE_UNKNOWN;
1.2612 +
1.2613 + {
1.2614 + nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem = aLoadingDocument->GetDocShell();
1.2615 + if (docShellTreeItem) {
1.2616 + nsCOMPtr<nsIDocShellTreeItem> root;
1.2617 + docShellTreeItem->GetRootTreeItem(getter_AddRefs(root));
1.2618 +
1.2619 + nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(root));
1.2620 +
1.2621 + if (!docShell || NS_FAILED(docShell->GetAppType(&appType))) {
1.2622 + appType = nsIDocShell::APP_TYPE_UNKNOWN;
1.2623 + }
1.2624 + }
1.2625 + }
1.2626 +
1.2627 + if (appType != nsIDocShell::APP_TYPE_EDITOR) {
1.2628 + // Editor apps get special treatment here, editors can load images
1.2629 + // from anywhere. This allows editor to insert images from file://
1.2630 + // into documents that are being edited.
1.2631 + rv = sSecurityManager->
1.2632 + CheckLoadURIWithPrincipal(aLoadingPrincipal, aURI,
1.2633 + nsIScriptSecurityManager::ALLOW_CHROME);
1.2634 + if (NS_FAILED(rv)) {
1.2635 + if (aImageBlockingStatus) {
1.2636 + // Reject the request itself, not all requests to the relevant
1.2637 + // server...
1.2638 + *aImageBlockingStatus = nsIContentPolicy::REJECT_REQUEST;
1.2639 + }
1.2640 + return false;
1.2641 + }
1.2642 + }
1.2643 +
1.2644 + int16_t decision = nsIContentPolicy::ACCEPT;
1.2645 +
1.2646 + rv = NS_CheckContentLoadPolicy(nsIContentPolicy::TYPE_IMAGE,
1.2647 + aURI,
1.2648 + aLoadingPrincipal,
1.2649 + aContext,
1.2650 + EmptyCString(), //mime guess
1.2651 + nullptr, //extra
1.2652 + &decision,
1.2653 + GetContentPolicy(),
1.2654 + sSecurityManager);
1.2655 +
1.2656 + if (aImageBlockingStatus) {
1.2657 + *aImageBlockingStatus =
1.2658 + NS_FAILED(rv) ? nsIContentPolicy::REJECT_REQUEST : decision;
1.2659 + }
1.2660 + return NS_FAILED(rv) ? false : NS_CP_ACCEPTED(decision);
1.2661 +}
1.2662 +
1.2663 +imgLoader*
1.2664 +nsContentUtils::GetImgLoaderForDocument(nsIDocument* aDoc)
1.2665 +{
1.2666 + if (!aDoc)
1.2667 + return imgLoader::Singleton();
1.2668 + bool isPrivate = false;
1.2669 + nsCOMPtr<nsILoadGroup> loadGroup = aDoc->GetDocumentLoadGroup();
1.2670 + nsCOMPtr<nsIInterfaceRequestor> callbacks;
1.2671 + if (loadGroup) {
1.2672 + loadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
1.2673 + if (callbacks) {
1.2674 + nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
1.2675 + isPrivate = loadContext && loadContext->UsePrivateBrowsing();
1.2676 + }
1.2677 + } else {
1.2678 + nsCOMPtr<nsIChannel> channel = aDoc->GetChannel();
1.2679 + isPrivate = channel && NS_UsePrivateBrowsing(channel);
1.2680 + }
1.2681 + return isPrivate ? imgLoader::PBSingleton() : imgLoader::Singleton();
1.2682 +}
1.2683 +
1.2684 +// static
1.2685 +imgLoader*
1.2686 +nsContentUtils::GetImgLoaderForChannel(nsIChannel* aChannel)
1.2687 +{
1.2688 + if (!aChannel)
1.2689 + return imgLoader::Singleton();
1.2690 + nsCOMPtr<nsILoadContext> context;
1.2691 + NS_QueryNotificationCallbacks(aChannel, context);
1.2692 + return context && context->UsePrivateBrowsing() ? imgLoader::PBSingleton() : imgLoader::Singleton();
1.2693 +}
1.2694 +
1.2695 +// static
1.2696 +bool
1.2697 +nsContentUtils::IsImageInCache(nsIURI* aURI, nsIDocument* aDocument)
1.2698 +{
1.2699 + imgILoader* loader = GetImgLoaderForDocument(aDocument);
1.2700 + nsCOMPtr<imgICache> cache = do_QueryInterface(loader);
1.2701 +
1.2702 + // If something unexpected happened we return false, otherwise if props
1.2703 + // is set, the image is cached and we return true
1.2704 + nsCOMPtr<nsIProperties> props;
1.2705 + nsresult rv = cache->FindEntryProperties(aURI, getter_AddRefs(props));
1.2706 + return (NS_SUCCEEDED(rv) && props);
1.2707 +}
1.2708 +
1.2709 +// static
1.2710 +nsresult
1.2711 +nsContentUtils::LoadImage(nsIURI* aURI, nsIDocument* aLoadingDocument,
1.2712 + nsIPrincipal* aLoadingPrincipal, nsIURI* aReferrer,
1.2713 + imgINotificationObserver* aObserver, int32_t aLoadFlags,
1.2714 + const nsAString& initiatorType,
1.2715 + imgRequestProxy** aRequest)
1.2716 +{
1.2717 + NS_PRECONDITION(aURI, "Must have a URI");
1.2718 + NS_PRECONDITION(aLoadingDocument, "Must have a document");
1.2719 + NS_PRECONDITION(aLoadingPrincipal, "Must have a principal");
1.2720 + NS_PRECONDITION(aRequest, "Null out param");
1.2721 +
1.2722 + imgLoader* imgLoader = GetImgLoaderForDocument(aLoadingDocument);
1.2723 + if (!imgLoader) {
1.2724 + // nothing we can do here
1.2725 + return NS_OK;
1.2726 + }
1.2727 +
1.2728 + nsCOMPtr<nsILoadGroup> loadGroup = aLoadingDocument->GetDocumentLoadGroup();
1.2729 +
1.2730 + nsIURI *documentURI = aLoadingDocument->GetDocumentURI();
1.2731 +
1.2732 + NS_ASSERTION(loadGroup || IsFontTableURI(documentURI),
1.2733 + "Could not get loadgroup; onload may fire too early");
1.2734 +
1.2735 + // check for a Content Security Policy to pass down to the channel that
1.2736 + // will get created to load the image
1.2737 + nsCOMPtr<nsIChannelPolicy> channelPolicy;
1.2738 + nsCOMPtr<nsIContentSecurityPolicy> csp;
1.2739 + if (aLoadingPrincipal) {
1.2740 + nsresult rv = aLoadingPrincipal->GetCsp(getter_AddRefs(csp));
1.2741 + NS_ENSURE_SUCCESS(rv, rv);
1.2742 + if (csp) {
1.2743 + channelPolicy = do_CreateInstance("@mozilla.org/nschannelpolicy;1");
1.2744 + channelPolicy->SetContentSecurityPolicy(csp);
1.2745 + channelPolicy->SetLoadType(nsIContentPolicy::TYPE_IMAGE);
1.2746 + }
1.2747 + }
1.2748 +
1.2749 + // Make the URI immutable so people won't change it under us
1.2750 + NS_TryToSetImmutable(aURI);
1.2751 +
1.2752 + nsCOMPtr<nsIURI> firstPartyIsolationURI;
1.2753 + nsCOMPtr<mozIThirdPartyUtil> thirdPartySvc
1.2754 + = do_GetService(THIRDPARTYUTIL_CONTRACTID);
1.2755 + thirdPartySvc->GetFirstPartyIsolationURI(nullptr, aLoadingDocument,
1.2756 + getter_AddRefs(firstPartyIsolationURI));
1.2757 +
1.2758 + return imgLoader->LoadImage(aURI, /* uri to load */
1.2759 + firstPartyIsolationURI, /* firstPartyIsolationURI */
1.2760 + aReferrer, /* referrer */
1.2761 + aLoadingPrincipal, /* loading principal */
1.2762 + loadGroup, /* loadgroup */
1.2763 + aObserver, /* imgINotificationObserver */
1.2764 + aLoadingDocument, /* uniquification key */
1.2765 + aLoadFlags, /* load flags */
1.2766 + nullptr, /* cache key */
1.2767 + channelPolicy, /* CSP info */
1.2768 + initiatorType, /* the load initiator */
1.2769 + aRequest);
1.2770 +}
1.2771 +
1.2772 +// static
1.2773 +already_AddRefed<imgIContainer>
1.2774 +nsContentUtils::GetImageFromContent(nsIImageLoadingContent* aContent,
1.2775 + imgIRequest **aRequest)
1.2776 +{
1.2777 + if (aRequest) {
1.2778 + *aRequest = nullptr;
1.2779 + }
1.2780 +
1.2781 + NS_ENSURE_TRUE(aContent, nullptr);
1.2782 +
1.2783 + nsCOMPtr<imgIRequest> imgRequest;
1.2784 + aContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
1.2785 + getter_AddRefs(imgRequest));
1.2786 + if (!imgRequest) {
1.2787 + return nullptr;
1.2788 + }
1.2789 +
1.2790 + nsCOMPtr<imgIContainer> imgContainer;
1.2791 + imgRequest->GetImage(getter_AddRefs(imgContainer));
1.2792 +
1.2793 + if (!imgContainer) {
1.2794 + return nullptr;
1.2795 + }
1.2796 +
1.2797 + if (aRequest) {
1.2798 + imgRequest.swap(*aRequest);
1.2799 + }
1.2800 +
1.2801 + return imgContainer.forget();
1.2802 +}
1.2803 +
1.2804 +//static
1.2805 +already_AddRefed<imgRequestProxy>
1.2806 +nsContentUtils::GetStaticRequest(imgRequestProxy* aRequest)
1.2807 +{
1.2808 + NS_ENSURE_TRUE(aRequest, nullptr);
1.2809 + nsRefPtr<imgRequestProxy> retval;
1.2810 + aRequest->GetStaticRequest(getter_AddRefs(retval));
1.2811 + return retval.forget();
1.2812 +}
1.2813 +
1.2814 +// static
1.2815 +bool
1.2816 +nsContentUtils::ContentIsDraggable(nsIContent* aContent)
1.2817 +{
1.2818 + nsCOMPtr<nsIDOMHTMLElement> htmlElement = do_QueryInterface(aContent);
1.2819 + if (htmlElement) {
1.2820 + bool draggable = false;
1.2821 + htmlElement->GetDraggable(&draggable);
1.2822 + if (draggable)
1.2823 + return true;
1.2824 +
1.2825 + if (aContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::draggable,
1.2826 + nsGkAtoms::_false, eIgnoreCase))
1.2827 + return false;
1.2828 + }
1.2829 +
1.2830 + // special handling for content area image and link dragging
1.2831 + return IsDraggableImage(aContent) || IsDraggableLink(aContent);
1.2832 +}
1.2833 +
1.2834 +// static
1.2835 +bool
1.2836 +nsContentUtils::IsDraggableImage(nsIContent* aContent)
1.2837 +{
1.2838 + NS_PRECONDITION(aContent, "Must have content node to test");
1.2839 +
1.2840 + nsCOMPtr<nsIImageLoadingContent> imageContent(do_QueryInterface(aContent));
1.2841 + if (!imageContent) {
1.2842 + return false;
1.2843 + }
1.2844 +
1.2845 + nsCOMPtr<imgIRequest> imgRequest;
1.2846 + imageContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
1.2847 + getter_AddRefs(imgRequest));
1.2848 +
1.2849 + // XXXbz It may be draggable even if the request resulted in an error. Why?
1.2850 + // Not sure; that's what the old nsContentAreaDragDrop/nsFrame code did.
1.2851 + return imgRequest != nullptr;
1.2852 +}
1.2853 +
1.2854 +// static
1.2855 +bool
1.2856 +nsContentUtils::IsDraggableLink(const nsIContent* aContent) {
1.2857 + nsCOMPtr<nsIURI> absURI;
1.2858 + return aContent->IsLink(getter_AddRefs(absURI));
1.2859 +}
1.2860 +
1.2861 +// static
1.2862 +nsresult
1.2863 +nsContentUtils::NameChanged(nsINodeInfo* aNodeInfo, nsIAtom* aName,
1.2864 + nsINodeInfo** aResult)
1.2865 +{
1.2866 + nsNodeInfoManager *niMgr = aNodeInfo->NodeInfoManager();
1.2867 +
1.2868 + *aResult = niMgr->GetNodeInfo(aName, aNodeInfo->GetPrefixAtom(),
1.2869 + aNodeInfo->NamespaceID(),
1.2870 + aNodeInfo->NodeType(),
1.2871 + aNodeInfo->GetExtraName()).take();
1.2872 + return NS_OK;
1.2873 +}
1.2874 +
1.2875 +
1.2876 +static bool
1.2877 +TestSitePerm(nsIPrincipal* aPrincipal, const char* aType, uint32_t aPerm, bool aExactHostMatch)
1.2878 +{
1.2879 + if (!aPrincipal) {
1.2880 + // We always deny (i.e. don't allow) the permission if we don't have a
1.2881 + // principal.
1.2882 + return aPerm != nsIPermissionManager::ALLOW_ACTION;
1.2883 + }
1.2884 +
1.2885 + nsCOMPtr<nsIPermissionManager> permMgr =
1.2886 + do_GetService("@mozilla.org/permissionmanager;1");
1.2887 + NS_ENSURE_TRUE(permMgr, false);
1.2888 +
1.2889 + uint32_t perm;
1.2890 + nsresult rv;
1.2891 + if (aExactHostMatch) {
1.2892 + rv = permMgr->TestExactPermissionFromPrincipal(aPrincipal, aType, &perm);
1.2893 + } else {
1.2894 + rv = permMgr->TestPermissionFromPrincipal(aPrincipal, aType, &perm);
1.2895 + }
1.2896 + NS_ENSURE_SUCCESS(rv, false);
1.2897 +
1.2898 + return perm == aPerm;
1.2899 +}
1.2900 +
1.2901 +bool
1.2902 +nsContentUtils::IsSitePermAllow(nsIPrincipal* aPrincipal, const char* aType)
1.2903 +{
1.2904 + return TestSitePerm(aPrincipal, aType, nsIPermissionManager::ALLOW_ACTION, false);
1.2905 +}
1.2906 +
1.2907 +bool
1.2908 +nsContentUtils::IsSitePermDeny(nsIPrincipal* aPrincipal, const char* aType)
1.2909 +{
1.2910 + return TestSitePerm(aPrincipal, aType, nsIPermissionManager::DENY_ACTION, false);
1.2911 +}
1.2912 +
1.2913 +bool
1.2914 +nsContentUtils::IsExactSitePermAllow(nsIPrincipal* aPrincipal, const char* aType)
1.2915 +{
1.2916 + return TestSitePerm(aPrincipal, aType, nsIPermissionManager::ALLOW_ACTION, true);
1.2917 +}
1.2918 +
1.2919 +bool
1.2920 +nsContentUtils::IsExactSitePermDeny(nsIPrincipal* aPrincipal, const char* aType)
1.2921 +{
1.2922 + return TestSitePerm(aPrincipal, aType, nsIPermissionManager::DENY_ACTION, true);
1.2923 +}
1.2924 +
1.2925 +static const char *gEventNames[] = {"event"};
1.2926 +static const char *gSVGEventNames[] = {"evt"};
1.2927 +// for b/w compat, the first name to onerror is still 'event', even though it
1.2928 +// is actually the error message. (pre this code, the other 2 were not avail.)
1.2929 +// XXXmarkh - a quick lxr shows no affected code - should we correct this?
1.2930 +static const char *gOnErrorNames[] = {"event", "source", "lineno"};
1.2931 +
1.2932 +// static
1.2933 +void
1.2934 +nsContentUtils::GetEventArgNames(int32_t aNameSpaceID,
1.2935 + nsIAtom *aEventName,
1.2936 + uint32_t *aArgCount,
1.2937 + const char*** aArgArray)
1.2938 +{
1.2939 +#define SET_EVENT_ARG_NAMES(names) \
1.2940 + *aArgCount = sizeof(names)/sizeof(names[0]); \
1.2941 + *aArgArray = names;
1.2942 +
1.2943 + // JSEventHandler is what does the arg magic for onerror, and it does
1.2944 + // not seem to take the namespace into account. So we let onerror in all
1.2945 + // namespaces get the 3 arg names.
1.2946 + if (aEventName == nsGkAtoms::onerror) {
1.2947 + SET_EVENT_ARG_NAMES(gOnErrorNames);
1.2948 + } else if (aNameSpaceID == kNameSpaceID_SVG) {
1.2949 + SET_EVENT_ARG_NAMES(gSVGEventNames);
1.2950 + } else {
1.2951 + SET_EVENT_ARG_NAMES(gEventNames);
1.2952 + }
1.2953 +}
1.2954 +
1.2955 +static const char gPropertiesFiles[nsContentUtils::PropertiesFile_COUNT][56] = {
1.2956 + // Must line up with the enum values in |PropertiesFile| enum.
1.2957 + "chrome://global/locale/css.properties",
1.2958 + "chrome://global/locale/xbl.properties",
1.2959 + "chrome://global/locale/xul.properties",
1.2960 + "chrome://global/locale/layout_errors.properties",
1.2961 + "chrome://global/locale/layout/HtmlForm.properties",
1.2962 + "chrome://global/locale/printing.properties",
1.2963 + "chrome://global/locale/dom/dom.properties",
1.2964 + "chrome://global/locale/layout/htmlparser.properties",
1.2965 + "chrome://global/locale/svg/svg.properties",
1.2966 + "chrome://branding/locale/brand.properties",
1.2967 + "chrome://global/locale/commonDialogs.properties",
1.2968 + "chrome://global/locale/mathml/mathml.properties",
1.2969 + "chrome://global/locale/security/security.properties"
1.2970 +};
1.2971 +
1.2972 +/* static */ nsresult
1.2973 +nsContentUtils::EnsureStringBundle(PropertiesFile aFile)
1.2974 +{
1.2975 + if (!sStringBundles[aFile]) {
1.2976 + if (!sStringBundleService) {
1.2977 + nsresult rv =
1.2978 + CallGetService(NS_STRINGBUNDLE_CONTRACTID, &sStringBundleService);
1.2979 + NS_ENSURE_SUCCESS(rv, rv);
1.2980 + }
1.2981 + nsIStringBundle *bundle;
1.2982 + nsresult rv =
1.2983 + sStringBundleService->CreateBundle(gPropertiesFiles[aFile], &bundle);
1.2984 + NS_ENSURE_SUCCESS(rv, rv);
1.2985 + sStringBundles[aFile] = bundle; // transfer ownership
1.2986 + }
1.2987 + return NS_OK;
1.2988 +}
1.2989 +
1.2990 +/* static */
1.2991 +nsresult nsContentUtils::GetLocalizedString(PropertiesFile aFile,
1.2992 + const char* aKey,
1.2993 + nsXPIDLString& aResult)
1.2994 +{
1.2995 + nsresult rv = EnsureStringBundle(aFile);
1.2996 + NS_ENSURE_SUCCESS(rv, rv);
1.2997 + nsIStringBundle *bundle = sStringBundles[aFile];
1.2998 +
1.2999 + return bundle->GetStringFromName(NS_ConvertASCIItoUTF16(aKey).get(),
1.3000 + getter_Copies(aResult));
1.3001 +}
1.3002 +
1.3003 +/* static */
1.3004 +nsresult nsContentUtils::FormatLocalizedString(PropertiesFile aFile,
1.3005 + const char* aKey,
1.3006 + const char16_t **aParams,
1.3007 + uint32_t aParamsLength,
1.3008 + nsXPIDLString& aResult)
1.3009 +{
1.3010 + nsresult rv = EnsureStringBundle(aFile);
1.3011 + NS_ENSURE_SUCCESS(rv, rv);
1.3012 + nsIStringBundle *bundle = sStringBundles[aFile];
1.3013 +
1.3014 + return bundle->FormatStringFromName(NS_ConvertASCIItoUTF16(aKey).get(),
1.3015 + aParams, aParamsLength,
1.3016 + getter_Copies(aResult));
1.3017 +}
1.3018 +
1.3019 +/* static */ void
1.3020 +nsContentUtils::LogSimpleConsoleError(const nsAString& aErrorText,
1.3021 + const char * classification)
1.3022 +{
1.3023 + nsCOMPtr<nsIScriptError> scriptError =
1.3024 + do_CreateInstance(NS_SCRIPTERROR_CONTRACTID);
1.3025 + if (scriptError) {
1.3026 + nsCOMPtr<nsIConsoleService> console =
1.3027 + do_GetService(NS_CONSOLESERVICE_CONTRACTID);
1.3028 + if (console && NS_SUCCEEDED(scriptError->Init(aErrorText, EmptyString(),
1.3029 + EmptyString(), 0, 0,
1.3030 + nsIScriptError::errorFlag,
1.3031 + classification))) {
1.3032 + console->LogMessage(scriptError);
1.3033 + }
1.3034 + }
1.3035 +}
1.3036 +
1.3037 +/* static */ nsresult
1.3038 +nsContentUtils::ReportToConsole(uint32_t aErrorFlags,
1.3039 + const nsACString& aCategory,
1.3040 + nsIDocument* aDocument,
1.3041 + PropertiesFile aFile,
1.3042 + const char *aMessageName,
1.3043 + const char16_t **aParams,
1.3044 + uint32_t aParamsLength,
1.3045 + nsIURI* aURI,
1.3046 + const nsAFlatString& aSourceLine,
1.3047 + uint32_t aLineNumber,
1.3048 + uint32_t aColumnNumber)
1.3049 +{
1.3050 + NS_ASSERTION((aParams && aParamsLength) || (!aParams && !aParamsLength),
1.3051 + "Supply either both parameters and their number or no"
1.3052 + "parameters and 0.");
1.3053 +
1.3054 + nsresult rv;
1.3055 + nsXPIDLString errorText;
1.3056 + if (aParams) {
1.3057 + rv = FormatLocalizedString(aFile, aMessageName, aParams, aParamsLength,
1.3058 + errorText);
1.3059 + }
1.3060 + else {
1.3061 + rv = GetLocalizedString(aFile, aMessageName, errorText);
1.3062 + }
1.3063 + NS_ENSURE_SUCCESS(rv, rv);
1.3064 +
1.3065 + return ReportToConsoleNonLocalized(errorText, aErrorFlags, aCategory,
1.3066 + aDocument, aURI, aSourceLine,
1.3067 + aLineNumber, aColumnNumber);
1.3068 +}
1.3069 +
1.3070 +
1.3071 +/* static */ nsresult
1.3072 +nsContentUtils::ReportToConsoleNonLocalized(const nsAString& aErrorText,
1.3073 + uint32_t aErrorFlags,
1.3074 + const nsACString& aCategory,
1.3075 + nsIDocument* aDocument,
1.3076 + nsIURI* aURI,
1.3077 + const nsAFlatString& aSourceLine,
1.3078 + uint32_t aLineNumber,
1.3079 + uint32_t aColumnNumber)
1.3080 +{
1.3081 + uint64_t innerWindowID = 0;
1.3082 + if (aDocument) {
1.3083 + if (!aURI) {
1.3084 + aURI = aDocument->GetDocumentURI();
1.3085 + }
1.3086 + innerWindowID = aDocument->InnerWindowID();
1.3087 + }
1.3088 +
1.3089 + nsresult rv;
1.3090 + if (!sConsoleService) { // only need to bother null-checking here
1.3091 + rv = CallGetService(NS_CONSOLESERVICE_CONTRACTID, &sConsoleService);
1.3092 + NS_ENSURE_SUCCESS(rv, rv);
1.3093 + }
1.3094 +
1.3095 + nsAutoCString spec;
1.3096 + if (!aLineNumber) {
1.3097 + JSContext *cx = GetCurrentJSContext();
1.3098 + if (cx) {
1.3099 + const char* filename;
1.3100 + uint32_t lineno;
1.3101 + if (nsJSUtils::GetCallingLocation(cx, &filename, &lineno)) {
1.3102 + spec = filename;
1.3103 + aLineNumber = lineno;
1.3104 + }
1.3105 + }
1.3106 + }
1.3107 + if (spec.IsEmpty() && aURI)
1.3108 + aURI->GetSpec(spec);
1.3109 +
1.3110 + nsCOMPtr<nsIScriptError> errorObject =
1.3111 + do_CreateInstance(NS_SCRIPTERROR_CONTRACTID, &rv);
1.3112 + NS_ENSURE_SUCCESS(rv, rv);
1.3113 +
1.3114 + rv = errorObject->InitWithWindowID(aErrorText,
1.3115 + NS_ConvertUTF8toUTF16(spec), // file name
1.3116 + aSourceLine,
1.3117 + aLineNumber, aColumnNumber,
1.3118 + aErrorFlags, aCategory,
1.3119 + innerWindowID);
1.3120 + NS_ENSURE_SUCCESS(rv, rv);
1.3121 +
1.3122 + return sConsoleService->LogMessage(errorObject);
1.3123 +}
1.3124 +
1.3125 +void
1.3126 +nsContentUtils::LogMessageToConsole(const char* aMsg, ...)
1.3127 +{
1.3128 + if (!sConsoleService) { // only need to bother null-checking here
1.3129 + CallGetService(NS_CONSOLESERVICE_CONTRACTID, &sConsoleService);
1.3130 + if (!sConsoleService) {
1.3131 + return;
1.3132 + }
1.3133 + }
1.3134 +
1.3135 + va_list args;
1.3136 + va_start(args, aMsg);
1.3137 + char* formatted = PR_vsmprintf(aMsg, args);
1.3138 + va_end(args);
1.3139 + if (!formatted) {
1.3140 + return;
1.3141 + }
1.3142 +
1.3143 + sConsoleService->LogStringMessage(NS_ConvertUTF8toUTF16(formatted).get());
1.3144 + PR_smprintf_free(formatted);
1.3145 +}
1.3146 +
1.3147 +bool
1.3148 +nsContentUtils::IsChromeDoc(nsIDocument *aDocument)
1.3149 +{
1.3150 + if (!aDocument) {
1.3151 + return false;
1.3152 + }
1.3153 +
1.3154 + nsCOMPtr<nsIPrincipal> systemPrincipal;
1.3155 + sSecurityManager->GetSystemPrincipal(getter_AddRefs(systemPrincipal));
1.3156 +
1.3157 + return aDocument->NodePrincipal() == systemPrincipal;
1.3158 +}
1.3159 +
1.3160 +bool
1.3161 +nsContentUtils::IsChildOfSameType(nsIDocument* aDoc)
1.3162 +{
1.3163 + nsCOMPtr<nsIDocShellTreeItem> docShellAsItem(aDoc->GetDocShell());
1.3164 + nsCOMPtr<nsIDocShellTreeItem> sameTypeParent;
1.3165 + if (docShellAsItem) {
1.3166 + docShellAsItem->GetSameTypeParent(getter_AddRefs(sameTypeParent));
1.3167 + }
1.3168 + return sameTypeParent != nullptr;
1.3169 +}
1.3170 +
1.3171 +bool
1.3172 +nsContentUtils::IsPlainTextType(const nsACString& aContentType)
1.3173 +{
1.3174 + return aContentType.EqualsLiteral(TEXT_PLAIN) ||
1.3175 + aContentType.EqualsLiteral(TEXT_CSS) ||
1.3176 + aContentType.EqualsLiteral(TEXT_CACHE_MANIFEST) ||
1.3177 + aContentType.EqualsLiteral(APPLICATION_JAVASCRIPT) ||
1.3178 + aContentType.EqualsLiteral(APPLICATION_XJAVASCRIPT) ||
1.3179 + aContentType.EqualsLiteral(TEXT_ECMASCRIPT) ||
1.3180 + aContentType.EqualsLiteral(APPLICATION_ECMASCRIPT) ||
1.3181 + aContentType.EqualsLiteral(TEXT_JAVASCRIPT) ||
1.3182 + aContentType.EqualsLiteral(APPLICATION_JSON);
1.3183 +}
1.3184 +
1.3185 +bool
1.3186 +nsContentUtils::GetWrapperSafeScriptFilename(nsIDocument *aDocument,
1.3187 + nsIURI *aURI,
1.3188 + nsACString& aScriptURI)
1.3189 +{
1.3190 + bool scriptFileNameModified = false;
1.3191 + aURI->GetSpec(aScriptURI);
1.3192 +
1.3193 + if (IsChromeDoc(aDocument)) {
1.3194 + nsCOMPtr<nsIChromeRegistry> chromeReg =
1.3195 + mozilla::services::GetChromeRegistryService();
1.3196 +
1.3197 + if (!chromeReg) {
1.3198 + // If we're running w/o a chrome registry we won't modify any
1.3199 + // script file names.
1.3200 +
1.3201 + return scriptFileNameModified;
1.3202 + }
1.3203 +
1.3204 + bool docWrappersEnabled =
1.3205 + chromeReg->WrappersEnabled(aDocument->GetDocumentURI());
1.3206 +
1.3207 + bool uriWrappersEnabled = chromeReg->WrappersEnabled(aURI);
1.3208 +
1.3209 + nsIURI *docURI = aDocument->GetDocumentURI();
1.3210 +
1.3211 + if (docURI && docWrappersEnabled && !uriWrappersEnabled) {
1.3212 + // aURI is a script from a URL that doesn't get wrapper
1.3213 + // automation. aDocument is a chrome document that does get
1.3214 + // wrapper automation. Prepend the chrome document's URI
1.3215 + // followed by the string " -> " to the URI of the script we're
1.3216 + // loading here so that script in that URI gets the same wrapper
1.3217 + // automation that the chrome document expects.
1.3218 + nsAutoCString spec;
1.3219 + docURI->GetSpec(spec);
1.3220 + spec.AppendLiteral(" -> ");
1.3221 + spec.Append(aScriptURI);
1.3222 +
1.3223 + aScriptURI = spec;
1.3224 +
1.3225 + scriptFileNameModified = true;
1.3226 + }
1.3227 + }
1.3228 +
1.3229 + return scriptFileNameModified;
1.3230 +}
1.3231 +
1.3232 +// static
1.3233 +bool
1.3234 +nsContentUtils::IsInChromeDocshell(nsIDocument *aDocument)
1.3235 +{
1.3236 + if (!aDocument) {
1.3237 + return false;
1.3238 + }
1.3239 +
1.3240 + if (aDocument->GetDisplayDocument()) {
1.3241 + return IsInChromeDocshell(aDocument->GetDisplayDocument());
1.3242 + }
1.3243 +
1.3244 + nsCOMPtr<nsIDocShellTreeItem> docShell = aDocument->GetDocShell();
1.3245 + if (!docShell) {
1.3246 + return false;
1.3247 + }
1.3248 +
1.3249 + return docShell->ItemType() == nsIDocShellTreeItem::typeChrome;
1.3250 +}
1.3251 +
1.3252 +// static
1.3253 +nsIContentPolicy*
1.3254 +nsContentUtils::GetContentPolicy()
1.3255 +{
1.3256 + if (!sTriedToGetContentPolicy) {
1.3257 + CallGetService(NS_CONTENTPOLICY_CONTRACTID, &sContentPolicyService);
1.3258 + // It's OK to not have a content policy service
1.3259 + sTriedToGetContentPolicy = true;
1.3260 + }
1.3261 +
1.3262 + return sContentPolicyService;
1.3263 +}
1.3264 +
1.3265 +// static
1.3266 +bool
1.3267 +nsContentUtils::IsEventAttributeName(nsIAtom* aName, int32_t aType)
1.3268 +{
1.3269 + const char16_t* name = aName->GetUTF16String();
1.3270 + if (name[0] != 'o' || name[1] != 'n')
1.3271 + return false;
1.3272 +
1.3273 + EventNameMapping mapping;
1.3274 + return (sAtomEventTable->Get(aName, &mapping) && mapping.mType & aType);
1.3275 +}
1.3276 +
1.3277 +// static
1.3278 +uint32_t
1.3279 +nsContentUtils::GetEventId(nsIAtom* aName)
1.3280 +{
1.3281 + if (aName) {
1.3282 + EventNameMapping mapping;
1.3283 + if (sAtomEventTable->Get(aName, &mapping)) {
1.3284 + return mapping.mId;
1.3285 + }
1.3286 + }
1.3287 +
1.3288 + return NS_USER_DEFINED_EVENT;
1.3289 +}
1.3290 +
1.3291 +// static
1.3292 +uint32_t
1.3293 +nsContentUtils::GetEventCategory(const nsAString& aName)
1.3294 +{
1.3295 + EventNameMapping mapping;
1.3296 + if (sStringEventTable->Get(aName, &mapping))
1.3297 + return mapping.mStructType;
1.3298 +
1.3299 + return NS_EVENT;
1.3300 +}
1.3301 +
1.3302 +nsIAtom*
1.3303 +nsContentUtils::GetEventIdAndAtom(const nsAString& aName,
1.3304 + uint32_t aEventStruct,
1.3305 + uint32_t* aEventID)
1.3306 +{
1.3307 + EventNameMapping mapping;
1.3308 + if (sStringEventTable->Get(aName, &mapping)) {
1.3309 + *aEventID =
1.3310 + mapping.mStructType == aEventStruct ? mapping.mId : NS_USER_DEFINED_EVENT;
1.3311 + return mapping.mAtom;
1.3312 + }
1.3313 +
1.3314 + // If we have cached lots of user defined event names, clear some of them.
1.3315 + if (sUserDefinedEvents->Count() > 127) {
1.3316 + while (sUserDefinedEvents->Count() > 64) {
1.3317 + nsIAtom* first = sUserDefinedEvents->ObjectAt(0);
1.3318 + sStringEventTable->Remove(Substring(nsDependentAtomString(first), 2));
1.3319 + sUserDefinedEvents->RemoveObjectAt(0);
1.3320 + }
1.3321 + }
1.3322 +
1.3323 + *aEventID = NS_USER_DEFINED_EVENT;
1.3324 + nsCOMPtr<nsIAtom> atom = do_GetAtom(NS_LITERAL_STRING("on") + aName);
1.3325 + sUserDefinedEvents->AppendObject(atom);
1.3326 + mapping.mAtom = atom;
1.3327 + mapping.mId = NS_USER_DEFINED_EVENT;
1.3328 + mapping.mType = EventNameType_None;
1.3329 + mapping.mStructType = NS_EVENT_NULL;
1.3330 + sStringEventTable->Put(aName, mapping);
1.3331 + return mapping.mAtom;
1.3332 +}
1.3333 +
1.3334 +static
1.3335 +nsresult GetEventAndTarget(nsIDocument* aDoc, nsISupports* aTarget,
1.3336 + const nsAString& aEventName,
1.3337 + bool aCanBubble, bool aCancelable,
1.3338 + bool aTrusted, nsIDOMEvent** aEvent,
1.3339 + EventTarget** aTargetOut)
1.3340 +{
1.3341 + nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(aDoc);
1.3342 + nsCOMPtr<EventTarget> target(do_QueryInterface(aTarget));
1.3343 + NS_ENSURE_TRUE(domDoc && target, NS_ERROR_INVALID_ARG);
1.3344 +
1.3345 + nsCOMPtr<nsIDOMEvent> event;
1.3346 + nsresult rv =
1.3347 + domDoc->CreateEvent(NS_LITERAL_STRING("Events"), getter_AddRefs(event));
1.3348 + NS_ENSURE_SUCCESS(rv, rv);
1.3349 +
1.3350 + rv = event->InitEvent(aEventName, aCanBubble, aCancelable);
1.3351 + NS_ENSURE_SUCCESS(rv, rv);
1.3352 +
1.3353 + event->SetTrusted(aTrusted);
1.3354 +
1.3355 + rv = event->SetTarget(target);
1.3356 + NS_ENSURE_SUCCESS(rv, rv);
1.3357 +
1.3358 + event.forget(aEvent);
1.3359 + target.forget(aTargetOut);
1.3360 + return NS_OK;
1.3361 +}
1.3362 +
1.3363 +// static
1.3364 +nsresult
1.3365 +nsContentUtils::DispatchTrustedEvent(nsIDocument* aDoc, nsISupports* aTarget,
1.3366 + const nsAString& aEventName,
1.3367 + bool aCanBubble, bool aCancelable,
1.3368 + bool *aDefaultAction)
1.3369 +{
1.3370 + return DispatchEvent(aDoc, aTarget, aEventName, aCanBubble, aCancelable,
1.3371 + true, aDefaultAction);
1.3372 +}
1.3373 +
1.3374 +// static
1.3375 +nsresult
1.3376 +nsContentUtils::DispatchUntrustedEvent(nsIDocument* aDoc, nsISupports* aTarget,
1.3377 + const nsAString& aEventName,
1.3378 + bool aCanBubble, bool aCancelable,
1.3379 + bool *aDefaultAction)
1.3380 +{
1.3381 + return DispatchEvent(aDoc, aTarget, aEventName, aCanBubble, aCancelable,
1.3382 + false, aDefaultAction);
1.3383 +}
1.3384 +
1.3385 +// static
1.3386 +nsresult
1.3387 +nsContentUtils::DispatchEvent(nsIDocument* aDoc, nsISupports* aTarget,
1.3388 + const nsAString& aEventName,
1.3389 + bool aCanBubble, bool aCancelable,
1.3390 + bool aTrusted, bool *aDefaultAction)
1.3391 +{
1.3392 + nsCOMPtr<nsIDOMEvent> event;
1.3393 + nsCOMPtr<EventTarget> target;
1.3394 + nsresult rv = GetEventAndTarget(aDoc, aTarget, aEventName, aCanBubble,
1.3395 + aCancelable, aTrusted, getter_AddRefs(event),
1.3396 + getter_AddRefs(target));
1.3397 + NS_ENSURE_SUCCESS(rv, rv);
1.3398 +
1.3399 + bool dummy;
1.3400 + return target->DispatchEvent(event, aDefaultAction ? aDefaultAction : &dummy);
1.3401 +}
1.3402 +
1.3403 +nsresult
1.3404 +nsContentUtils::DispatchChromeEvent(nsIDocument *aDoc,
1.3405 + nsISupports *aTarget,
1.3406 + const nsAString& aEventName,
1.3407 + bool aCanBubble, bool aCancelable,
1.3408 + bool *aDefaultAction)
1.3409 +{
1.3410 +
1.3411 + nsCOMPtr<nsIDOMEvent> event;
1.3412 + nsCOMPtr<EventTarget> target;
1.3413 + nsresult rv = GetEventAndTarget(aDoc, aTarget, aEventName, aCanBubble,
1.3414 + aCancelable, true, getter_AddRefs(event),
1.3415 + getter_AddRefs(target));
1.3416 + NS_ENSURE_SUCCESS(rv, rv);
1.3417 +
1.3418 + NS_ASSERTION(aDoc, "GetEventAndTarget lied?");
1.3419 + if (!aDoc->GetWindow())
1.3420 + return NS_ERROR_INVALID_ARG;
1.3421 +
1.3422 + EventTarget* piTarget = aDoc->GetWindow()->GetParentTarget();
1.3423 + if (!piTarget)
1.3424 + return NS_ERROR_INVALID_ARG;
1.3425 +
1.3426 + nsEventStatus status = nsEventStatus_eIgnore;
1.3427 + rv = piTarget->DispatchDOMEvent(nullptr, event, nullptr, &status);
1.3428 + if (aDefaultAction) {
1.3429 + *aDefaultAction = (status != nsEventStatus_eConsumeNoDefault);
1.3430 + }
1.3431 + return rv;
1.3432 +}
1.3433 +
1.3434 +/* static */
1.3435 +Element*
1.3436 +nsContentUtils::MatchElementId(nsIContent *aContent, const nsIAtom* aId)
1.3437 +{
1.3438 + for (nsIContent* cur = aContent;
1.3439 + cur;
1.3440 + cur = cur->GetNextNode(aContent)) {
1.3441 + if (aId == cur->GetID()) {
1.3442 + return cur->AsElement();
1.3443 + }
1.3444 + }
1.3445 +
1.3446 + return nullptr;
1.3447 +}
1.3448 +
1.3449 +/* static */
1.3450 +Element *
1.3451 +nsContentUtils::MatchElementId(nsIContent *aContent, const nsAString& aId)
1.3452 +{
1.3453 + NS_PRECONDITION(!aId.IsEmpty(), "Will match random elements");
1.3454 +
1.3455 + // ID attrs are generally stored as atoms, so just atomize this up front
1.3456 + nsCOMPtr<nsIAtom> id(do_GetAtom(aId));
1.3457 + if (!id) {
1.3458 + // OOM, so just bail
1.3459 + return nullptr;
1.3460 + }
1.3461 +
1.3462 + return MatchElementId(aContent, id);
1.3463 +}
1.3464 +
1.3465 +// Convert the string from the given encoding to Unicode.
1.3466 +/* static */
1.3467 +nsresult
1.3468 +nsContentUtils::ConvertStringFromEncoding(const nsACString& aEncoding,
1.3469 + const nsACString& aInput,
1.3470 + nsAString& aOutput)
1.3471 +{
1.3472 + nsAutoCString encoding;
1.3473 + if (aEncoding.IsEmpty()) {
1.3474 + encoding.AssignLiteral("UTF-8");
1.3475 + } else {
1.3476 + encoding.Assign(aEncoding);
1.3477 + }
1.3478 +
1.3479 + ErrorResult rv;
1.3480 + nsAutoPtr<TextDecoder> decoder(new TextDecoder());
1.3481 + decoder->InitWithEncoding(encoding, false);
1.3482 +
1.3483 + decoder->Decode(aInput.BeginReading(), aInput.Length(), false,
1.3484 + aOutput, rv);
1.3485 + return rv.ErrorCode();
1.3486 +}
1.3487 +
1.3488 +/* static */
1.3489 +bool
1.3490 +nsContentUtils::CheckForBOM(const unsigned char* aBuffer, uint32_t aLength,
1.3491 + nsACString& aCharset)
1.3492 +{
1.3493 + bool found = true;
1.3494 + aCharset.Truncate();
1.3495 + if (aLength >= 3 &&
1.3496 + aBuffer[0] == 0xEF &&
1.3497 + aBuffer[1] == 0xBB &&
1.3498 + aBuffer[2] == 0xBF) {
1.3499 + aCharset = "UTF-8";
1.3500 + }
1.3501 + else if (aLength >= 2 &&
1.3502 + aBuffer[0] == 0xFE && aBuffer[1] == 0xFF) {
1.3503 + aCharset = "UTF-16BE";
1.3504 + }
1.3505 + else if (aLength >= 2 &&
1.3506 + aBuffer[0] == 0xFF && aBuffer[1] == 0xFE) {
1.3507 + aCharset = "UTF-16LE";
1.3508 + } else {
1.3509 + found = false;
1.3510 + }
1.3511 +
1.3512 + return found;
1.3513 +}
1.3514 +
1.3515 +/* static */
1.3516 +void
1.3517 +nsContentUtils::RegisterShutdownObserver(nsIObserver* aObserver)
1.3518 +{
1.3519 + nsCOMPtr<nsIObserverService> observerService =
1.3520 + mozilla::services::GetObserverService();
1.3521 + if (observerService) {
1.3522 + observerService->AddObserver(aObserver,
1.3523 + NS_XPCOM_SHUTDOWN_OBSERVER_ID,
1.3524 + false);
1.3525 + }
1.3526 +}
1.3527 +
1.3528 +/* static */
1.3529 +void
1.3530 +nsContentUtils::UnregisterShutdownObserver(nsIObserver* aObserver)
1.3531 +{
1.3532 + nsCOMPtr<nsIObserverService> observerService =
1.3533 + mozilla::services::GetObserverService();
1.3534 + if (observerService) {
1.3535 + observerService->RemoveObserver(aObserver, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
1.3536 + }
1.3537 +}
1.3538 +
1.3539 +/* static */
1.3540 +bool
1.3541 +nsContentUtils::HasNonEmptyAttr(const nsIContent* aContent, int32_t aNameSpaceID,
1.3542 + nsIAtom* aName)
1.3543 +{
1.3544 + static nsIContent::AttrValuesArray strings[] = {&nsGkAtoms::_empty, nullptr};
1.3545 + return aContent->FindAttrValueIn(aNameSpaceID, aName, strings, eCaseMatters)
1.3546 + == nsIContent::ATTR_VALUE_NO_MATCH;
1.3547 +}
1.3548 +
1.3549 +/* static */
1.3550 +bool
1.3551 +nsContentUtils::HasMutationListeners(nsINode* aNode,
1.3552 + uint32_t aType,
1.3553 + nsINode* aTargetForSubtreeModified)
1.3554 +{
1.3555 + nsIDocument* doc = aNode->OwnerDoc();
1.3556 +
1.3557 + // global object will be null for documents that don't have windows.
1.3558 + nsPIDOMWindow* window = doc->GetInnerWindow();
1.3559 + // This relies on EventListenerManager::AddEventListener, which sets
1.3560 + // all mutation bits when there is a listener for DOMSubtreeModified event.
1.3561 + if (window && !window->HasMutationListeners(aType)) {
1.3562 + return false;
1.3563 + }
1.3564 +
1.3565 + if (aNode->IsNodeOfType(nsINode::eCONTENT) &&
1.3566 + static_cast<nsIContent*>(aNode)->ChromeOnlyAccess()) {
1.3567 + return false;
1.3568 + }
1.3569 +
1.3570 + doc->MayDispatchMutationEvent(aTargetForSubtreeModified);
1.3571 +
1.3572 + // If we have a window, we can check it for mutation listeners now.
1.3573 + if (aNode->IsInDoc()) {
1.3574 + nsCOMPtr<EventTarget> piTarget(do_QueryInterface(window));
1.3575 + if (piTarget) {
1.3576 + EventListenerManager* manager = piTarget->GetExistingListenerManager();
1.3577 + if (manager && manager->HasMutationListeners()) {
1.3578 + return true;
1.3579 + }
1.3580 + }
1.3581 + }
1.3582 +
1.3583 + // If we have a window, we know a mutation listener is registered, but it
1.3584 + // might not be in our chain. If we don't have a window, we might have a
1.3585 + // mutation listener. Check quickly to see.
1.3586 + while (aNode) {
1.3587 + EventListenerManager* manager = aNode->GetExistingListenerManager();
1.3588 + if (manager && manager->HasMutationListeners()) {
1.3589 + return true;
1.3590 + }
1.3591 +
1.3592 + if (aNode->IsNodeOfType(nsINode::eCONTENT)) {
1.3593 + nsIContent* content = static_cast<nsIContent*>(aNode);
1.3594 + nsIContent* insertionParent = content->GetXBLInsertionParent();
1.3595 + if (insertionParent) {
1.3596 + aNode = insertionParent;
1.3597 + continue;
1.3598 + }
1.3599 + }
1.3600 + aNode = aNode->GetParentNode();
1.3601 + }
1.3602 +
1.3603 + return false;
1.3604 +}
1.3605 +
1.3606 +/* static */
1.3607 +bool
1.3608 +nsContentUtils::HasMutationListeners(nsIDocument* aDocument,
1.3609 + uint32_t aType)
1.3610 +{
1.3611 + nsPIDOMWindow* window = aDocument ?
1.3612 + aDocument->GetInnerWindow() : nullptr;
1.3613 +
1.3614 + // This relies on EventListenerManager::AddEventListener, which sets
1.3615 + // all mutation bits when there is a listener for DOMSubtreeModified event.
1.3616 + return !window || window->HasMutationListeners(aType);
1.3617 +}
1.3618 +
1.3619 +void
1.3620 +nsContentUtils::MaybeFireNodeRemoved(nsINode* aChild, nsINode* aParent,
1.3621 + nsIDocument* aOwnerDoc)
1.3622 +{
1.3623 + NS_PRECONDITION(aChild, "Missing child");
1.3624 + NS_PRECONDITION(aChild->GetParentNode() == aParent, "Wrong parent");
1.3625 + NS_PRECONDITION(aChild->OwnerDoc() == aOwnerDoc, "Wrong owner-doc");
1.3626 +
1.3627 + // This checks that IsSafeToRunScript is true since we don't want to fire
1.3628 + // events when that is false. We can't rely on EventDispatcher to assert
1.3629 + // this in this situation since most of the time there are no mutation
1.3630 + // event listeners, in which case we won't even attempt to dispatch events.
1.3631 + // However this also allows for two exceptions. First off, we don't assert
1.3632 + // if the mutation happens to native anonymous content since we never fire
1.3633 + // mutation events on such content anyway.
1.3634 + // Second, we don't assert if sDOMNodeRemovedSuppressCount is true since
1.3635 + // that is a know case when we'd normally fire a mutation event, but can't
1.3636 + // make that safe and so we suppress it at this time. Ideally this should
1.3637 + // go away eventually.
1.3638 + NS_ASSERTION((aChild->IsNodeOfType(nsINode::eCONTENT) &&
1.3639 + static_cast<nsIContent*>(aChild)->
1.3640 + IsInNativeAnonymousSubtree()) ||
1.3641 + IsSafeToRunScript() ||
1.3642 + sDOMNodeRemovedSuppressCount,
1.3643 + "Want to fire DOMNodeRemoved event, but it's not safe");
1.3644 +
1.3645 + // Having an explicit check here since it's an easy mistake to fall into,
1.3646 + // and there might be existing code with problems. We'd rather be safe
1.3647 + // than fire DOMNodeRemoved in all corner cases. We also rely on it for
1.3648 + // nsAutoScriptBlockerSuppressNodeRemoved.
1.3649 + if (!IsSafeToRunScript()) {
1.3650 + return;
1.3651 + }
1.3652 +
1.3653 + if (HasMutationListeners(aChild,
1.3654 + NS_EVENT_BITS_MUTATION_NODEREMOVED, aParent)) {
1.3655 + InternalMutationEvent mutation(true, NS_MUTATION_NODEREMOVED);
1.3656 + mutation.mRelatedNode = do_QueryInterface(aParent);
1.3657 +
1.3658 + mozAutoSubtreeModified subtree(aOwnerDoc, aParent);
1.3659 + EventDispatcher::Dispatch(aChild, nullptr, &mutation);
1.3660 + }
1.3661 +}
1.3662 +
1.3663 +PLDHashOperator
1.3664 +ListenerEnumerator(PLDHashTable* aTable, PLDHashEntryHdr* aEntry,
1.3665 + uint32_t aNumber, void* aArg)
1.3666 +{
1.3667 + EventListenerManagerMapEntry* entry =
1.3668 + static_cast<EventListenerManagerMapEntry*>(aEntry);
1.3669 + if (entry) {
1.3670 + nsINode* n = static_cast<nsINode*>(entry->mListenerManager->GetTarget());
1.3671 + if (n && n->IsInDoc() &&
1.3672 + nsCCUncollectableMarker::InGeneration(n->OwnerDoc()->GetMarkedCCGeneration())) {
1.3673 + entry->mListenerManager->MarkForCC();
1.3674 + }
1.3675 + }
1.3676 + return PL_DHASH_NEXT;
1.3677 +}
1.3678 +
1.3679 +void
1.3680 +nsContentUtils::UnmarkGrayJSListenersInCCGenerationDocuments(uint32_t aGeneration)
1.3681 +{
1.3682 + if (sEventListenerManagersHash.ops) {
1.3683 + PL_DHashTableEnumerate(&sEventListenerManagersHash, ListenerEnumerator,
1.3684 + &aGeneration);
1.3685 + }
1.3686 +}
1.3687 +
1.3688 +/* static */
1.3689 +void
1.3690 +nsContentUtils::TraverseListenerManager(nsINode *aNode,
1.3691 + nsCycleCollectionTraversalCallback &cb)
1.3692 +{
1.3693 + if (!sEventListenerManagersHash.ops) {
1.3694 + // We're already shut down, just return.
1.3695 + return;
1.3696 + }
1.3697 +
1.3698 + EventListenerManagerMapEntry *entry =
1.3699 + static_cast<EventListenerManagerMapEntry *>
1.3700 + (PL_DHashTableOperate(&sEventListenerManagersHash, aNode,
1.3701 + PL_DHASH_LOOKUP));
1.3702 + if (PL_DHASH_ENTRY_IS_BUSY(entry)) {
1.3703 + CycleCollectionNoteChild(cb, entry->mListenerManager.get(),
1.3704 + "[via hash] mListenerManager");
1.3705 + }
1.3706 +}
1.3707 +
1.3708 +EventListenerManager*
1.3709 +nsContentUtils::GetListenerManagerForNode(nsINode *aNode)
1.3710 +{
1.3711 + if (!sEventListenerManagersHash.ops) {
1.3712 + // We're already shut down, don't bother creating an event listener
1.3713 + // manager.
1.3714 +
1.3715 + return nullptr;
1.3716 + }
1.3717 +
1.3718 + EventListenerManagerMapEntry *entry =
1.3719 + static_cast<EventListenerManagerMapEntry *>
1.3720 + (PL_DHashTableOperate(&sEventListenerManagersHash, aNode,
1.3721 + PL_DHASH_ADD));
1.3722 +
1.3723 + if (!entry) {
1.3724 + return nullptr;
1.3725 + }
1.3726 +
1.3727 + if (!entry->mListenerManager) {
1.3728 + entry->mListenerManager = new EventListenerManager(aNode);
1.3729 +
1.3730 + aNode->SetFlags(NODE_HAS_LISTENERMANAGER);
1.3731 + }
1.3732 +
1.3733 + return entry->mListenerManager;
1.3734 +}
1.3735 +
1.3736 +EventListenerManager*
1.3737 +nsContentUtils::GetExistingListenerManagerForNode(const nsINode *aNode)
1.3738 +{
1.3739 + if (!aNode->HasFlag(NODE_HAS_LISTENERMANAGER)) {
1.3740 + return nullptr;
1.3741 + }
1.3742 +
1.3743 + if (!sEventListenerManagersHash.ops) {
1.3744 + // We're already shut down, don't bother creating an event listener
1.3745 + // manager.
1.3746 +
1.3747 + return nullptr;
1.3748 + }
1.3749 +
1.3750 + EventListenerManagerMapEntry *entry =
1.3751 + static_cast<EventListenerManagerMapEntry *>
1.3752 + (PL_DHashTableOperate(&sEventListenerManagersHash, aNode,
1.3753 + PL_DHASH_LOOKUP));
1.3754 + if (PL_DHASH_ENTRY_IS_BUSY(entry)) {
1.3755 + return entry->mListenerManager;
1.3756 + }
1.3757 +
1.3758 + return nullptr;
1.3759 +}
1.3760 +
1.3761 +/* static */
1.3762 +void
1.3763 +nsContentUtils::RemoveListenerManager(nsINode *aNode)
1.3764 +{
1.3765 + if (sEventListenerManagersHash.ops) {
1.3766 + EventListenerManagerMapEntry *entry =
1.3767 + static_cast<EventListenerManagerMapEntry *>
1.3768 + (PL_DHashTableOperate(&sEventListenerManagersHash, aNode,
1.3769 + PL_DHASH_LOOKUP));
1.3770 + if (PL_DHASH_ENTRY_IS_BUSY(entry)) {
1.3771 + nsRefPtr<EventListenerManager> listenerManager;
1.3772 + listenerManager.swap(entry->mListenerManager);
1.3773 + // Remove the entry and *then* do operations that could cause further
1.3774 + // modification of sEventListenerManagersHash. See bug 334177.
1.3775 + PL_DHashTableRawRemove(&sEventListenerManagersHash, entry);
1.3776 + if (listenerManager) {
1.3777 + listenerManager->Disconnect();
1.3778 + }
1.3779 + }
1.3780 + }
1.3781 +}
1.3782 +
1.3783 +/* static */
1.3784 +bool
1.3785 +nsContentUtils::IsValidNodeName(nsIAtom *aLocalName, nsIAtom *aPrefix,
1.3786 + int32_t aNamespaceID)
1.3787 +{
1.3788 + if (aNamespaceID == kNameSpaceID_Unknown) {
1.3789 + return false;
1.3790 + }
1.3791 +
1.3792 + if (!aPrefix) {
1.3793 + // If the prefix is null, then either the QName must be xmlns or the
1.3794 + // namespace must not be XMLNS.
1.3795 + return (aLocalName == nsGkAtoms::xmlns) ==
1.3796 + (aNamespaceID == kNameSpaceID_XMLNS);
1.3797 + }
1.3798 +
1.3799 + // If the prefix is non-null then the namespace must not be null.
1.3800 + if (aNamespaceID == kNameSpaceID_None) {
1.3801 + return false;
1.3802 + }
1.3803 +
1.3804 + // If the namespace is the XMLNS namespace then the prefix must be xmlns,
1.3805 + // but the localname must not be xmlns.
1.3806 + if (aNamespaceID == kNameSpaceID_XMLNS) {
1.3807 + return aPrefix == nsGkAtoms::xmlns && aLocalName != nsGkAtoms::xmlns;
1.3808 + }
1.3809 +
1.3810 + // If the namespace is not the XMLNS namespace then the prefix must not be
1.3811 + // xmlns.
1.3812 + // If the namespace is the XML namespace then the prefix can be anything.
1.3813 + // If the namespace is not the XML namespace then the prefix must not be xml.
1.3814 + return aPrefix != nsGkAtoms::xmlns &&
1.3815 + (aNamespaceID == kNameSpaceID_XML || aPrefix != nsGkAtoms::xml);
1.3816 +}
1.3817 +
1.3818 +/* static */
1.3819 +nsresult
1.3820 +nsContentUtils::CreateContextualFragment(nsINode* aContextNode,
1.3821 + const nsAString& aFragment,
1.3822 + bool aPreventScriptExecution,
1.3823 + nsIDOMDocumentFragment** aReturn)
1.3824 +{
1.3825 + ErrorResult rv;
1.3826 + *aReturn = CreateContextualFragment(aContextNode, aFragment,
1.3827 + aPreventScriptExecution, rv).take();
1.3828 + return rv.ErrorCode();
1.3829 +}
1.3830 +
1.3831 +already_AddRefed<DocumentFragment>
1.3832 +nsContentUtils::CreateContextualFragment(nsINode* aContextNode,
1.3833 + const nsAString& aFragment,
1.3834 + bool aPreventScriptExecution,
1.3835 + ErrorResult& aRv)
1.3836 +{
1.3837 + if (!aContextNode) {
1.3838 + aRv.Throw(NS_ERROR_INVALID_ARG);
1.3839 + return nullptr;
1.3840 + }
1.3841 +
1.3842 + // If we don't have a document here, we can't get the right security context
1.3843 + // for compiling event handlers... so just bail out.
1.3844 + nsCOMPtr<nsIDocument> document = aContextNode->OwnerDoc();
1.3845 + bool isHTML = document->IsHTML();
1.3846 +#ifdef DEBUG
1.3847 + nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(document);
1.3848 + NS_ASSERTION(!isHTML || htmlDoc, "Should have HTMLDocument here!");
1.3849 +#endif
1.3850 +
1.3851 + if (isHTML) {
1.3852 + nsRefPtr<DocumentFragment> frag =
1.3853 + new DocumentFragment(document->NodeInfoManager());
1.3854 +
1.3855 + nsCOMPtr<nsIContent> contextAsContent = do_QueryInterface(aContextNode);
1.3856 + if (contextAsContent && !contextAsContent->IsElement()) {
1.3857 + contextAsContent = contextAsContent->GetParent();
1.3858 + if (contextAsContent && !contextAsContent->IsElement()) {
1.3859 + // can this even happen?
1.3860 + contextAsContent = nullptr;
1.3861 + }
1.3862 + }
1.3863 +
1.3864 + if (contextAsContent && !contextAsContent->IsHTML(nsGkAtoms::html)) {
1.3865 + aRv = ParseFragmentHTML(aFragment, frag,
1.3866 + contextAsContent->Tag(),
1.3867 + contextAsContent->GetNameSpaceID(),
1.3868 + (document->GetCompatibilityMode() ==
1.3869 + eCompatibility_NavQuirks),
1.3870 + aPreventScriptExecution);
1.3871 + } else {
1.3872 + aRv = ParseFragmentHTML(aFragment, frag,
1.3873 + nsGkAtoms::body,
1.3874 + kNameSpaceID_XHTML,
1.3875 + (document->GetCompatibilityMode() ==
1.3876 + eCompatibility_NavQuirks),
1.3877 + aPreventScriptExecution);
1.3878 + }
1.3879 +
1.3880 + return frag.forget();
1.3881 + }
1.3882 +
1.3883 + nsAutoTArray<nsString, 32> tagStack;
1.3884 + nsAutoString uriStr, nameStr;
1.3885 + nsCOMPtr<nsIContent> content = do_QueryInterface(aContextNode);
1.3886 + // just in case we have a text node
1.3887 + if (content && !content->IsElement())
1.3888 + content = content->GetParent();
1.3889 +
1.3890 + while (content && content->IsElement()) {
1.3891 + nsString& tagName = *tagStack.AppendElement();
1.3892 + if (!&tagName) {
1.3893 + aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
1.3894 + return nullptr;
1.3895 + }
1.3896 +
1.3897 + tagName = content->NodeInfo()->QualifiedName();
1.3898 +
1.3899 + // see if we need to add xmlns declarations
1.3900 + uint32_t count = content->GetAttrCount();
1.3901 + bool setDefaultNamespace = false;
1.3902 + if (count > 0) {
1.3903 + uint32_t index;
1.3904 +
1.3905 + for (index = 0; index < count; index++) {
1.3906 + const nsAttrName* name = content->GetAttrNameAt(index);
1.3907 + if (name->NamespaceEquals(kNameSpaceID_XMLNS)) {
1.3908 + content->GetAttr(kNameSpaceID_XMLNS, name->LocalName(), uriStr);
1.3909 +
1.3910 + // really want something like nsXMLContentSerializer::SerializeAttr
1.3911 + tagName.Append(NS_LITERAL_STRING(" xmlns")); // space important
1.3912 + if (name->GetPrefix()) {
1.3913 + tagName.Append(char16_t(':'));
1.3914 + name->LocalName()->ToString(nameStr);
1.3915 + tagName.Append(nameStr);
1.3916 + } else {
1.3917 + setDefaultNamespace = true;
1.3918 + }
1.3919 + tagName.Append(NS_LITERAL_STRING("=\"") + uriStr +
1.3920 + NS_LITERAL_STRING("\""));
1.3921 + }
1.3922 + }
1.3923 + }
1.3924 +
1.3925 + if (!setDefaultNamespace) {
1.3926 + nsINodeInfo* info = content->NodeInfo();
1.3927 + if (!info->GetPrefixAtom() &&
1.3928 + info->NamespaceID() != kNameSpaceID_None) {
1.3929 + // We have no namespace prefix, but have a namespace ID. Push
1.3930 + // default namespace attr in, so that our kids will be in our
1.3931 + // namespace.
1.3932 + info->GetNamespaceURI(uriStr);
1.3933 + tagName.Append(NS_LITERAL_STRING(" xmlns=\"") + uriStr +
1.3934 + NS_LITERAL_STRING("\""));
1.3935 + }
1.3936 + }
1.3937 +
1.3938 + content = content->GetParent();
1.3939 + }
1.3940 +
1.3941 + nsCOMPtr<nsIDOMDocumentFragment> frag;
1.3942 + aRv = ParseFragmentXML(aFragment, document, tagStack,
1.3943 + aPreventScriptExecution, getter_AddRefs(frag));
1.3944 + return frag.forget().downcast<DocumentFragment>();
1.3945 +}
1.3946 +
1.3947 +/* static */
1.3948 +void
1.3949 +nsContentUtils::DropFragmentParsers()
1.3950 +{
1.3951 + NS_IF_RELEASE(sHTMLFragmentParser);
1.3952 + NS_IF_RELEASE(sXMLFragmentParser);
1.3953 + NS_IF_RELEASE(sXMLFragmentSink);
1.3954 +}
1.3955 +
1.3956 +/* static */
1.3957 +void
1.3958 +nsContentUtils::XPCOMShutdown()
1.3959 +{
1.3960 + nsContentUtils::DropFragmentParsers();
1.3961 +}
1.3962 +
1.3963 +/* static */
1.3964 +nsresult
1.3965 +nsContentUtils::ParseFragmentHTML(const nsAString& aSourceBuffer,
1.3966 + nsIContent* aTargetNode,
1.3967 + nsIAtom* aContextLocalName,
1.3968 + int32_t aContextNamespace,
1.3969 + bool aQuirks,
1.3970 + bool aPreventScriptExecution)
1.3971 +{
1.3972 + if (nsContentUtils::sFragmentParsingActive) {
1.3973 + NS_NOTREACHED("Re-entrant fragment parsing attempted.");
1.3974 + return NS_ERROR_DOM_INVALID_STATE_ERR;
1.3975 + }
1.3976 + mozilla::AutoRestore<bool> guard(nsContentUtils::sFragmentParsingActive);
1.3977 + nsContentUtils::sFragmentParsingActive = true;
1.3978 + if (!sHTMLFragmentParser) {
1.3979 + NS_ADDREF(sHTMLFragmentParser = new nsHtml5StringParser());
1.3980 + // Now sHTMLFragmentParser owns the object
1.3981 + }
1.3982 + nsresult rv =
1.3983 + sHTMLFragmentParser->ParseFragment(aSourceBuffer,
1.3984 + aTargetNode,
1.3985 + aContextLocalName,
1.3986 + aContextNamespace,
1.3987 + aQuirks,
1.3988 + aPreventScriptExecution);
1.3989 + return rv;
1.3990 +}
1.3991 +
1.3992 +/* static */
1.3993 +nsresult
1.3994 +nsContentUtils::ParseDocumentHTML(const nsAString& aSourceBuffer,
1.3995 + nsIDocument* aTargetDocument,
1.3996 + bool aScriptingEnabledForNoscriptParsing)
1.3997 +{
1.3998 + if (nsContentUtils::sFragmentParsingActive) {
1.3999 + NS_NOTREACHED("Re-entrant fragment parsing attempted.");
1.4000 + return NS_ERROR_DOM_INVALID_STATE_ERR;
1.4001 + }
1.4002 + mozilla::AutoRestore<bool> guard(nsContentUtils::sFragmentParsingActive);
1.4003 + nsContentUtils::sFragmentParsingActive = true;
1.4004 + if (!sHTMLFragmentParser) {
1.4005 + NS_ADDREF(sHTMLFragmentParser = new nsHtml5StringParser());
1.4006 + // Now sHTMLFragmentParser owns the object
1.4007 + }
1.4008 + nsresult rv =
1.4009 + sHTMLFragmentParser->ParseDocument(aSourceBuffer,
1.4010 + aTargetDocument,
1.4011 + aScriptingEnabledForNoscriptParsing);
1.4012 + return rv;
1.4013 +}
1.4014 +
1.4015 +/* static */
1.4016 +nsresult
1.4017 +nsContentUtils::ParseFragmentXML(const nsAString& aSourceBuffer,
1.4018 + nsIDocument* aDocument,
1.4019 + nsTArray<nsString>& aTagStack,
1.4020 + bool aPreventScriptExecution,
1.4021 + nsIDOMDocumentFragment** aReturn)
1.4022 +{
1.4023 + if (nsContentUtils::sFragmentParsingActive) {
1.4024 + NS_NOTREACHED("Re-entrant fragment parsing attempted.");
1.4025 + return NS_ERROR_DOM_INVALID_STATE_ERR;
1.4026 + }
1.4027 + mozilla::AutoRestore<bool> guard(nsContentUtils::sFragmentParsingActive);
1.4028 + nsContentUtils::sFragmentParsingActive = true;
1.4029 + if (!sXMLFragmentParser) {
1.4030 + nsCOMPtr<nsIParser> parser = do_CreateInstance(kCParserCID);
1.4031 + parser.forget(&sXMLFragmentParser);
1.4032 + // sXMLFragmentParser now owns the parser
1.4033 + }
1.4034 + if (!sXMLFragmentSink) {
1.4035 + NS_NewXMLFragmentContentSink(&sXMLFragmentSink);
1.4036 + // sXMLFragmentSink now owns the sink
1.4037 + }
1.4038 + nsCOMPtr<nsIContentSink> contentsink = do_QueryInterface(sXMLFragmentSink);
1.4039 + NS_ABORT_IF_FALSE(contentsink, "Sink doesn't QI to nsIContentSink!");
1.4040 + sXMLFragmentParser->SetContentSink(contentsink);
1.4041 +
1.4042 + sXMLFragmentSink->SetTargetDocument(aDocument);
1.4043 + sXMLFragmentSink->SetPreventScriptExecution(aPreventScriptExecution);
1.4044 +
1.4045 + nsresult rv =
1.4046 + sXMLFragmentParser->ParseFragment(aSourceBuffer,
1.4047 + aTagStack);
1.4048 + if (NS_FAILED(rv)) {
1.4049 + // Drop the fragment parser and sink that might be in an inconsistent state
1.4050 + NS_IF_RELEASE(sXMLFragmentParser);
1.4051 + NS_IF_RELEASE(sXMLFragmentSink);
1.4052 + return rv;
1.4053 + }
1.4054 +
1.4055 + rv = sXMLFragmentSink->FinishFragmentParsing(aReturn);
1.4056 +
1.4057 + sXMLFragmentParser->Reset();
1.4058 +
1.4059 + return rv;
1.4060 +}
1.4061 +
1.4062 +/* static */
1.4063 +nsresult
1.4064 +nsContentUtils::ConvertToPlainText(const nsAString& aSourceBuffer,
1.4065 + nsAString& aResultBuffer,
1.4066 + uint32_t aFlags,
1.4067 + uint32_t aWrapCol)
1.4068 +{
1.4069 + nsCOMPtr<nsIURI> uri;
1.4070 + NS_NewURI(getter_AddRefs(uri), "about:blank");
1.4071 + nsCOMPtr<nsIPrincipal> principal =
1.4072 + do_CreateInstance(NS_NULLPRINCIPAL_CONTRACTID);
1.4073 + nsCOMPtr<nsIDOMDocument> domDocument;
1.4074 + nsresult rv = NS_NewDOMDocument(getter_AddRefs(domDocument),
1.4075 + EmptyString(),
1.4076 + EmptyString(),
1.4077 + nullptr,
1.4078 + uri,
1.4079 + uri,
1.4080 + principal,
1.4081 + true,
1.4082 + nullptr,
1.4083 + DocumentFlavorHTML);
1.4084 + NS_ENSURE_SUCCESS(rv, rv);
1.4085 +
1.4086 + nsCOMPtr<nsIDocument> document = do_QueryInterface(domDocument);
1.4087 + rv = nsContentUtils::ParseDocumentHTML(aSourceBuffer, document,
1.4088 + !(aFlags & nsIDocumentEncoder::OutputNoScriptContent));
1.4089 + NS_ENSURE_SUCCESS(rv, rv);
1.4090 +
1.4091 + nsCOMPtr<nsIDocumentEncoder> encoder = do_CreateInstance(
1.4092 + "@mozilla.org/layout/documentEncoder;1?type=text/plain");
1.4093 +
1.4094 + rv = encoder->Init(domDocument, NS_LITERAL_STRING("text/plain"), aFlags);
1.4095 + NS_ENSURE_SUCCESS(rv, rv);
1.4096 +
1.4097 + encoder->SetWrapColumn(aWrapCol);
1.4098 +
1.4099 + return encoder->EncodeToString(aResultBuffer);
1.4100 +}
1.4101 +
1.4102 +/* static */
1.4103 +nsresult
1.4104 +nsContentUtils::SetNodeTextContent(nsIContent* aContent,
1.4105 + const nsAString& aValue,
1.4106 + bool aTryReuse)
1.4107 +{
1.4108 + // Fire DOMNodeRemoved mutation events before we do anything else.
1.4109 + nsCOMPtr<nsIContent> owningContent;
1.4110 +
1.4111 + // Batch possible DOMSubtreeModified events.
1.4112 + mozAutoSubtreeModified subtree(nullptr, nullptr);
1.4113 +
1.4114 + // Scope firing mutation events so that we don't carry any state that
1.4115 + // might be stale
1.4116 + {
1.4117 + // We're relying on mozAutoSubtreeModified to keep a strong reference if
1.4118 + // needed.
1.4119 + nsIDocument* doc = aContent->OwnerDoc();
1.4120 +
1.4121 + // Optimize the common case of there being no observers
1.4122 + if (HasMutationListeners(doc, NS_EVENT_BITS_MUTATION_NODEREMOVED)) {
1.4123 + subtree.UpdateTarget(doc, nullptr);
1.4124 + owningContent = aContent;
1.4125 + nsCOMPtr<nsINode> child;
1.4126 + bool skipFirst = aTryReuse;
1.4127 + for (child = aContent->GetFirstChild();
1.4128 + child && child->GetParentNode() == aContent;
1.4129 + child = child->GetNextSibling()) {
1.4130 + if (skipFirst && child->IsNodeOfType(nsINode::eTEXT)) {
1.4131 + skipFirst = false;
1.4132 + continue;
1.4133 + }
1.4134 + nsContentUtils::MaybeFireNodeRemoved(child, aContent, doc);
1.4135 + }
1.4136 + }
1.4137 + }
1.4138 +
1.4139 + // Might as well stick a batch around this since we're performing several
1.4140 + // mutations.
1.4141 + mozAutoDocUpdate updateBatch(aContent->GetCurrentDoc(),
1.4142 + UPDATE_CONTENT_MODEL, true);
1.4143 + nsAutoMutationBatch mb;
1.4144 +
1.4145 + uint32_t childCount = aContent->GetChildCount();
1.4146 +
1.4147 + if (aTryReuse && !aValue.IsEmpty()) {
1.4148 + uint32_t removeIndex = 0;
1.4149 +
1.4150 + for (uint32_t i = 0; i < childCount; ++i) {
1.4151 + nsIContent* child = aContent->GetChildAt(removeIndex);
1.4152 + if (removeIndex == 0 && child && child->IsNodeOfType(nsINode::eTEXT)) {
1.4153 + nsresult rv = child->SetText(aValue, true);
1.4154 + NS_ENSURE_SUCCESS(rv, rv);
1.4155 +
1.4156 + removeIndex = 1;
1.4157 + }
1.4158 + else {
1.4159 + aContent->RemoveChildAt(removeIndex, true);
1.4160 + }
1.4161 + }
1.4162 +
1.4163 + if (removeIndex == 1) {
1.4164 + return NS_OK;
1.4165 + }
1.4166 + }
1.4167 + else {
1.4168 + mb.Init(aContent, true, false);
1.4169 + for (uint32_t i = 0; i < childCount; ++i) {
1.4170 + aContent->RemoveChildAt(0, true);
1.4171 + }
1.4172 + }
1.4173 + mb.RemovalDone();
1.4174 +
1.4175 + if (aValue.IsEmpty()) {
1.4176 + return NS_OK;
1.4177 + }
1.4178 +
1.4179 + nsRefPtr<nsTextNode> textContent =
1.4180 + new nsTextNode(aContent->NodeInfo()->NodeInfoManager());
1.4181 +
1.4182 + textContent->SetText(aValue, true);
1.4183 +
1.4184 + nsresult rv = aContent->AppendChildTo(textContent, true);
1.4185 + mb.NodesAdded();
1.4186 + return rv;
1.4187 +}
1.4188 +
1.4189 +static bool
1.4190 +AppendNodeTextContentsRecurse(nsINode* aNode, nsAString& aResult,
1.4191 + const mozilla::fallible_t&)
1.4192 +{
1.4193 + for (nsIContent* child = aNode->GetFirstChild();
1.4194 + child;
1.4195 + child = child->GetNextSibling()) {
1.4196 + if (child->IsElement()) {
1.4197 + bool ok = AppendNodeTextContentsRecurse(child, aResult,
1.4198 + mozilla::fallible_t());
1.4199 + if (!ok) {
1.4200 + return false;
1.4201 + }
1.4202 + }
1.4203 + else if (child->IsNodeOfType(nsINode::eTEXT)) {
1.4204 + bool ok = child->AppendTextTo(aResult, mozilla::fallible_t());
1.4205 + if (!ok) {
1.4206 + return false;
1.4207 + }
1.4208 + }
1.4209 + }
1.4210 +
1.4211 + return true;
1.4212 +}
1.4213 +
1.4214 +/* static */
1.4215 +bool
1.4216 +nsContentUtils::AppendNodeTextContent(nsINode* aNode, bool aDeep,
1.4217 + nsAString& aResult,
1.4218 + const mozilla::fallible_t&)
1.4219 +{
1.4220 + if (aNode->IsNodeOfType(nsINode::eTEXT)) {
1.4221 + return static_cast<nsIContent*>(aNode)->AppendTextTo(aResult,
1.4222 + mozilla::fallible_t());
1.4223 + }
1.4224 + else if (aDeep) {
1.4225 + return AppendNodeTextContentsRecurse(aNode, aResult, mozilla::fallible_t());
1.4226 + }
1.4227 + else {
1.4228 + for (nsIContent* child = aNode->GetFirstChild();
1.4229 + child;
1.4230 + child = child->GetNextSibling()) {
1.4231 + if (child->IsNodeOfType(nsINode::eTEXT)) {
1.4232 + bool ok = child->AppendTextTo(aResult, mozilla::fallible_t());
1.4233 + if (!ok) {
1.4234 + return false;
1.4235 + }
1.4236 + }
1.4237 + }
1.4238 + }
1.4239 +
1.4240 + return true;
1.4241 +}
1.4242 +
1.4243 +bool
1.4244 +nsContentUtils::HasNonEmptyTextContent(nsINode* aNode)
1.4245 +{
1.4246 + for (nsIContent* child = aNode->GetFirstChild();
1.4247 + child;
1.4248 + child = child->GetNextSibling()) {
1.4249 + if (child->IsNodeOfType(nsINode::eTEXT) &&
1.4250 + child->TextLength() > 0) {
1.4251 + return true;
1.4252 + }
1.4253 + }
1.4254 +
1.4255 + return false;
1.4256 +}
1.4257 +
1.4258 +/* static */
1.4259 +bool
1.4260 +nsContentUtils::IsInSameAnonymousTree(const nsINode* aNode,
1.4261 + const nsIContent* aContent)
1.4262 +{
1.4263 + NS_PRECONDITION(aNode,
1.4264 + "Must have a node to work with");
1.4265 + NS_PRECONDITION(aContent,
1.4266 + "Must have a content to work with");
1.4267 +
1.4268 + if (!aNode->IsNodeOfType(nsINode::eCONTENT)) {
1.4269 + /**
1.4270 + * The root isn't an nsIContent, so it's a document or attribute. The only
1.4271 + * nodes in the same anonymous subtree as it will have a null
1.4272 + * bindingParent.
1.4273 + *
1.4274 + * XXXbz strictly speaking, that's not true for attribute nodes.
1.4275 + */
1.4276 + return aContent->GetBindingParent() == nullptr;
1.4277 + }
1.4278 +
1.4279 + const nsIContent* nodeAsContent = static_cast<const nsIContent*>(aNode);
1.4280 +
1.4281 + // For nodes in a shadow tree, it is insufficient to simply compare
1.4282 + // the binding parent because a node may host multiple ShadowRoots,
1.4283 + // thus nodes in different shadow tree may have the same binding parent.
1.4284 + if (aNode->HasFlag(NODE_IS_IN_SHADOW_TREE)) {
1.4285 + return nodeAsContent->GetContainingShadow() ==
1.4286 + aContent->GetContainingShadow();
1.4287 + }
1.4288 +
1.4289 + return nodeAsContent->GetBindingParent() == aContent->GetBindingParent();
1.4290 +}
1.4291 +
1.4292 +class AnonymousContentDestroyer : public nsRunnable {
1.4293 +public:
1.4294 + AnonymousContentDestroyer(nsCOMPtr<nsIContent>* aContent) {
1.4295 + mContent.swap(*aContent);
1.4296 + mParent = mContent->GetParent();
1.4297 + mDoc = mContent->OwnerDoc();
1.4298 + }
1.4299 + AnonymousContentDestroyer(nsCOMPtr<Element>* aElement) {
1.4300 + mContent = aElement->forget();
1.4301 + mParent = mContent->GetParent();
1.4302 + mDoc = mContent->OwnerDoc();
1.4303 + }
1.4304 + NS_IMETHOD Run() {
1.4305 + mContent->UnbindFromTree();
1.4306 + return NS_OK;
1.4307 + }
1.4308 +private:
1.4309 + nsCOMPtr<nsIContent> mContent;
1.4310 + // Hold strong refs to the parent content and document so that they
1.4311 + // don't die unexpectedly
1.4312 + nsCOMPtr<nsIDocument> mDoc;
1.4313 + nsCOMPtr<nsIContent> mParent;
1.4314 +};
1.4315 +
1.4316 +/* static */
1.4317 +void
1.4318 +nsContentUtils::DestroyAnonymousContent(nsCOMPtr<nsIContent>* aContent)
1.4319 +{
1.4320 + if (*aContent) {
1.4321 + AddScriptRunner(new AnonymousContentDestroyer(aContent));
1.4322 + }
1.4323 +}
1.4324 +
1.4325 +/* static */
1.4326 +void
1.4327 +nsContentUtils::DestroyAnonymousContent(nsCOMPtr<Element>* aElement)
1.4328 +{
1.4329 + if (*aElement) {
1.4330 + AddScriptRunner(new AnonymousContentDestroyer(aElement));
1.4331 + }
1.4332 +}
1.4333 +
1.4334 +/* static */
1.4335 +void
1.4336 +nsContentUtils::NotifyInstalledMenuKeyboardListener(bool aInstalling)
1.4337 +{
1.4338 + IMEStateManager::OnInstalledMenuKeyboardListener(aInstalling);
1.4339 +}
1.4340 +
1.4341 +static bool SchemeIs(nsIURI* aURI, const char* aScheme)
1.4342 +{
1.4343 + nsCOMPtr<nsIURI> baseURI = NS_GetInnermostURI(aURI);
1.4344 + NS_ENSURE_TRUE(baseURI, false);
1.4345 +
1.4346 + bool isScheme = false;
1.4347 + return NS_SUCCEEDED(baseURI->SchemeIs(aScheme, &isScheme)) && isScheme;
1.4348 +}
1.4349 +
1.4350 +/* static */
1.4351 +nsresult
1.4352 +nsContentUtils::CheckSecurityBeforeLoad(nsIURI* aURIToLoad,
1.4353 + nsIPrincipal* aLoadingPrincipal,
1.4354 + uint32_t aCheckLoadFlags,
1.4355 + bool aAllowData,
1.4356 + uint32_t aContentPolicyType,
1.4357 + nsISupports* aContext,
1.4358 + const nsAFlatCString& aMimeGuess,
1.4359 + nsISupports* aExtra)
1.4360 +{
1.4361 + NS_PRECONDITION(aLoadingPrincipal, "Must have a loading principal here");
1.4362 +
1.4363 + bool isSystemPrin = false;
1.4364 + if (NS_SUCCEEDED(sSecurityManager->IsSystemPrincipal(aLoadingPrincipal,
1.4365 + &isSystemPrin)) &&
1.4366 + isSystemPrin) {
1.4367 + return NS_OK;
1.4368 + }
1.4369 +
1.4370 + // XXXbz do we want to fast-path skin stylesheets loading XBL here somehow?
1.4371 + // CheckLoadURIWithPrincipal
1.4372 + nsresult rv = sSecurityManager->
1.4373 + CheckLoadURIWithPrincipal(aLoadingPrincipal, aURIToLoad, aCheckLoadFlags);
1.4374 + NS_ENSURE_SUCCESS(rv, rv);
1.4375 +
1.4376 + // Content Policy
1.4377 + int16_t shouldLoad = nsIContentPolicy::ACCEPT;
1.4378 + rv = NS_CheckContentLoadPolicy(aContentPolicyType,
1.4379 + aURIToLoad,
1.4380 + aLoadingPrincipal,
1.4381 + aContext,
1.4382 + aMimeGuess,
1.4383 + aExtra,
1.4384 + &shouldLoad,
1.4385 + GetContentPolicy(),
1.4386 + sSecurityManager);
1.4387 + NS_ENSURE_SUCCESS(rv, rv);
1.4388 + if (NS_CP_REJECTED(shouldLoad)) {
1.4389 + return NS_ERROR_CONTENT_BLOCKED;
1.4390 + }
1.4391 +
1.4392 + // Same Origin
1.4393 + if ((aAllowData && SchemeIs(aURIToLoad, "data")) ||
1.4394 + ((aCheckLoadFlags & nsIScriptSecurityManager::ALLOW_CHROME) &&
1.4395 + SchemeIs(aURIToLoad, "chrome"))) {
1.4396 + return NS_OK;
1.4397 + }
1.4398 +
1.4399 + return aLoadingPrincipal->CheckMayLoad(aURIToLoad, true, false);
1.4400 +}
1.4401 +
1.4402 +bool
1.4403 +nsContentUtils::IsSystemPrincipal(nsIPrincipal* aPrincipal)
1.4404 +{
1.4405 + bool isSystem;
1.4406 + nsresult rv = sSecurityManager->IsSystemPrincipal(aPrincipal, &isSystem);
1.4407 + return NS_SUCCEEDED(rv) && isSystem;
1.4408 +}
1.4409 +
1.4410 +bool
1.4411 +nsContentUtils::IsExpandedPrincipal(nsIPrincipal* aPrincipal)
1.4412 +{
1.4413 + nsCOMPtr<nsIExpandedPrincipal> ep = do_QueryInterface(aPrincipal);
1.4414 + return !!ep;
1.4415 +}
1.4416 +
1.4417 +nsIPrincipal*
1.4418 +nsContentUtils::GetSystemPrincipal()
1.4419 +{
1.4420 + nsCOMPtr<nsIPrincipal> sysPrin;
1.4421 + DebugOnly<nsresult> rv =
1.4422 + sSecurityManager->GetSystemPrincipal(getter_AddRefs(sysPrin));
1.4423 + MOZ_ASSERT(NS_SUCCEEDED(rv) && sysPrin);
1.4424 + return sysPrin;
1.4425 +}
1.4426 +
1.4427 +bool
1.4428 +nsContentUtils::CombineResourcePrincipals(nsCOMPtr<nsIPrincipal>* aResourcePrincipal,
1.4429 + nsIPrincipal* aExtraPrincipal)
1.4430 +{
1.4431 + if (!aExtraPrincipal) {
1.4432 + return false;
1.4433 + }
1.4434 + if (!*aResourcePrincipal) {
1.4435 + *aResourcePrincipal = aExtraPrincipal;
1.4436 + return true;
1.4437 + }
1.4438 + if (*aResourcePrincipal == aExtraPrincipal) {
1.4439 + return false;
1.4440 + }
1.4441 + bool subsumes;
1.4442 + if (NS_SUCCEEDED((*aResourcePrincipal)->Subsumes(aExtraPrincipal, &subsumes)) &&
1.4443 + subsumes) {
1.4444 + return false;
1.4445 + }
1.4446 + sSecurityManager->GetSystemPrincipal(getter_AddRefs(*aResourcePrincipal));
1.4447 + return true;
1.4448 +}
1.4449 +
1.4450 +/* static */
1.4451 +void
1.4452 +nsContentUtils::TriggerLink(nsIContent *aContent, nsPresContext *aPresContext,
1.4453 + nsIURI *aLinkURI, const nsString &aTargetSpec,
1.4454 + bool aClick, bool aIsUserTriggered,
1.4455 + bool aIsTrusted)
1.4456 +{
1.4457 + NS_ASSERTION(aPresContext, "Need a nsPresContext");
1.4458 + NS_PRECONDITION(aLinkURI, "No link URI");
1.4459 +
1.4460 + if (aContent->IsEditable()) {
1.4461 + return;
1.4462 + }
1.4463 +
1.4464 + nsILinkHandler *handler = aPresContext->GetLinkHandler();
1.4465 + if (!handler) {
1.4466 + return;
1.4467 + }
1.4468 +
1.4469 + if (!aClick) {
1.4470 + handler->OnOverLink(aContent, aLinkURI, aTargetSpec.get());
1.4471 + return;
1.4472 + }
1.4473 +
1.4474 + // Check that this page is allowed to load this URI.
1.4475 + nsresult proceed = NS_OK;
1.4476 +
1.4477 + if (sSecurityManager) {
1.4478 + uint32_t flag =
1.4479 + aIsUserTriggered ?
1.4480 + (uint32_t)nsIScriptSecurityManager::STANDARD :
1.4481 + (uint32_t)nsIScriptSecurityManager::LOAD_IS_AUTOMATIC_DOCUMENT_REPLACEMENT;
1.4482 + proceed =
1.4483 + sSecurityManager->CheckLoadURIWithPrincipal(aContent->NodePrincipal(),
1.4484 + aLinkURI, flag);
1.4485 + }
1.4486 +
1.4487 + // Only pass off the click event if the script security manager says it's ok.
1.4488 + // We need to rest aTargetSpec for forced downloads.
1.4489 + if (NS_SUCCEEDED(proceed)) {
1.4490 +
1.4491 + // A link/area element with a download attribute is allowed to set
1.4492 + // a pseudo Content-Disposition header.
1.4493 + // For security reasons we only allow websites to declare same-origin resources
1.4494 + // as downloadable. If this check fails we will just do the normal thing
1.4495 + // (i.e. navigate to the resource).
1.4496 + nsAutoString fileName;
1.4497 + if ((!aContent->IsHTML(nsGkAtoms::a) && !aContent->IsHTML(nsGkAtoms::area) &&
1.4498 + !aContent->IsSVG(nsGkAtoms::a)) ||
1.4499 + !aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::download, fileName) ||
1.4500 + NS_FAILED(aContent->NodePrincipal()->CheckMayLoad(aLinkURI, false, true))) {
1.4501 + fileName.SetIsVoid(true); // No actionable download attribute was found.
1.4502 + }
1.4503 +
1.4504 + handler->OnLinkClick(aContent, aLinkURI,
1.4505 + fileName.IsVoid() ? aTargetSpec.get() : EmptyString().get(),
1.4506 + fileName, nullptr, nullptr, aIsTrusted);
1.4507 + }
1.4508 +}
1.4509 +
1.4510 +/* static */
1.4511 +void
1.4512 +nsContentUtils::GetLinkLocation(Element* aElement, nsString& aLocationString)
1.4513 +{
1.4514 + nsCOMPtr<nsIURI> hrefURI = aElement->GetHrefURI();
1.4515 + if (hrefURI) {
1.4516 + nsAutoCString specUTF8;
1.4517 + nsresult rv = hrefURI->GetSpec(specUTF8);
1.4518 + if (NS_SUCCEEDED(rv))
1.4519 + CopyUTF8toUTF16(specUTF8, aLocationString);
1.4520 + }
1.4521 +}
1.4522 +
1.4523 +/* static */
1.4524 +nsIWidget*
1.4525 +nsContentUtils::GetTopLevelWidget(nsIWidget* aWidget)
1.4526 +{
1.4527 + if (!aWidget)
1.4528 + return nullptr;
1.4529 +
1.4530 + return aWidget->GetTopLevelWidget();
1.4531 +}
1.4532 +
1.4533 +/* static */
1.4534 +const nsDependentString
1.4535 +nsContentUtils::GetLocalizedEllipsis()
1.4536 +{
1.4537 + static char16_t sBuf[4] = { 0, 0, 0, 0 };
1.4538 + if (!sBuf[0]) {
1.4539 + nsAdoptingString tmp = Preferences::GetLocalizedString("intl.ellipsis");
1.4540 + uint32_t len = std::min(uint32_t(tmp.Length()),
1.4541 + uint32_t(ArrayLength(sBuf) - 1));
1.4542 + CopyUnicodeTo(tmp, 0, sBuf, len);
1.4543 + if (!sBuf[0])
1.4544 + sBuf[0] = char16_t(0x2026);
1.4545 + }
1.4546 + return nsDependentString(sBuf);
1.4547 +}
1.4548 +
1.4549 +static bool
1.4550 +HasASCIIDigit(const nsTArray<nsShortcutCandidate>& aCandidates)
1.4551 +{
1.4552 + for (uint32_t i = 0; i < aCandidates.Length(); ++i) {
1.4553 + uint32_t ch = aCandidates[i].mCharCode;
1.4554 + if (ch >= '0' && ch <= '9')
1.4555 + return true;
1.4556 + }
1.4557 + return false;
1.4558 +}
1.4559 +
1.4560 +static bool
1.4561 +CharsCaseInsensitiveEqual(uint32_t aChar1, uint32_t aChar2)
1.4562 +{
1.4563 + return aChar1 == aChar2 ||
1.4564 + (IS_IN_BMP(aChar1) && IS_IN_BMP(aChar2) &&
1.4565 + ToLowerCase(char16_t(aChar1)) == ToLowerCase(char16_t(aChar2)));
1.4566 +}
1.4567 +
1.4568 +static bool
1.4569 +IsCaseChangeableChar(uint32_t aChar)
1.4570 +{
1.4571 + return IS_IN_BMP(aChar) &&
1.4572 + ToLowerCase(char16_t(aChar)) != ToUpperCase(char16_t(aChar));
1.4573 +}
1.4574 +
1.4575 +/* static */
1.4576 +void
1.4577 +nsContentUtils::GetAccelKeyCandidates(nsIDOMKeyEvent* aDOMKeyEvent,
1.4578 + nsTArray<nsShortcutCandidate>& aCandidates)
1.4579 +{
1.4580 + NS_PRECONDITION(aCandidates.IsEmpty(), "aCandidates must be empty");
1.4581 +
1.4582 + nsAutoString eventType;
1.4583 + aDOMKeyEvent->GetType(eventType);
1.4584 + // Don't process if aDOMKeyEvent is not a keypress event.
1.4585 + if (!eventType.EqualsLiteral("keypress"))
1.4586 + return;
1.4587 +
1.4588 + WidgetKeyboardEvent* nativeKeyEvent =
1.4589 + aDOMKeyEvent->GetInternalNSEvent()->AsKeyboardEvent();
1.4590 + if (nativeKeyEvent) {
1.4591 + NS_ASSERTION(nativeKeyEvent->eventStructType == NS_KEY_EVENT,
1.4592 + "wrong type of native event");
1.4593 + // nsShortcutCandidate::mCharCode is a candidate charCode.
1.4594 + // nsShoftcutCandidate::mIgnoreShift means the mCharCode should be tried to
1.4595 + // execute a command with/without shift key state. If this is TRUE, the
1.4596 + // shifted key state should be ignored. Otherwise, don't ignore the state.
1.4597 + // the priority of the charCodes are (shift key is not pressed):
1.4598 + // 0: charCode/false,
1.4599 + // 1: unshiftedCharCodes[0]/false, 2: unshiftedCharCodes[1]/false...
1.4600 + // the priority of the charCodes are (shift key is pressed):
1.4601 + // 0: charCode/false,
1.4602 + // 1: shiftedCharCodes[0]/false, 2: shiftedCharCodes[0]/true,
1.4603 + // 3: shiftedCharCodes[1]/false, 4: shiftedCharCodes[1]/true...
1.4604 + if (nativeKeyEvent->charCode) {
1.4605 + nsShortcutCandidate key(nativeKeyEvent->charCode, false);
1.4606 + aCandidates.AppendElement(key);
1.4607 + }
1.4608 +
1.4609 + uint32_t len = nativeKeyEvent->alternativeCharCodes.Length();
1.4610 + if (!nativeKeyEvent->IsShift()) {
1.4611 + for (uint32_t i = 0; i < len; ++i) {
1.4612 + uint32_t ch =
1.4613 + nativeKeyEvent->alternativeCharCodes[i].mUnshiftedCharCode;
1.4614 + if (!ch || ch == nativeKeyEvent->charCode)
1.4615 + continue;
1.4616 +
1.4617 + nsShortcutCandidate key(ch, false);
1.4618 + aCandidates.AppendElement(key);
1.4619 + }
1.4620 + // If unshiftedCharCodes doesn't have numeric but shiftedCharCode has it,
1.4621 + // this keyboard layout is AZERTY or similar layout, probably.
1.4622 + // In this case, Accel+[0-9] should be accessible without shift key.
1.4623 + // However, the priority should be lowest.
1.4624 + if (!HasASCIIDigit(aCandidates)) {
1.4625 + for (uint32_t i = 0; i < len; ++i) {
1.4626 + uint32_t ch =
1.4627 + nativeKeyEvent->alternativeCharCodes[i].mShiftedCharCode;
1.4628 + if (ch >= '0' && ch <= '9') {
1.4629 + nsShortcutCandidate key(ch, false);
1.4630 + aCandidates.AppendElement(key);
1.4631 + break;
1.4632 + }
1.4633 + }
1.4634 + }
1.4635 + } else {
1.4636 + for (uint32_t i = 0; i < len; ++i) {
1.4637 + uint32_t ch = nativeKeyEvent->alternativeCharCodes[i].mShiftedCharCode;
1.4638 + if (!ch)
1.4639 + continue;
1.4640 +
1.4641 + if (ch != nativeKeyEvent->charCode) {
1.4642 + nsShortcutCandidate key(ch, false);
1.4643 + aCandidates.AppendElement(key);
1.4644 + }
1.4645 +
1.4646 + // If the char is an alphabet, the shift key state should not be
1.4647 + // ignored. E.g., Ctrl+Shift+C should not execute Ctrl+C.
1.4648 +
1.4649 + // And checking the charCode is same as unshiftedCharCode too.
1.4650 + // E.g., for Ctrl+Shift+(Plus of Numpad) should not run Ctrl+Plus.
1.4651 + uint32_t unshiftCh =
1.4652 + nativeKeyEvent->alternativeCharCodes[i].mUnshiftedCharCode;
1.4653 + if (CharsCaseInsensitiveEqual(ch, unshiftCh))
1.4654 + continue;
1.4655 +
1.4656 + // On the Hebrew keyboard layout on Windows, the unshifted char is a
1.4657 + // localized character but the shifted char is a Latin alphabet,
1.4658 + // then, we should not execute without the shift state. See bug 433192.
1.4659 + if (IsCaseChangeableChar(ch))
1.4660 + continue;
1.4661 +
1.4662 + // Setting the alternative charCode candidates for retry without shift
1.4663 + // key state only when the shift key is pressed.
1.4664 + nsShortcutCandidate key(ch, true);
1.4665 + aCandidates.AppendElement(key);
1.4666 + }
1.4667 + }
1.4668 + } else {
1.4669 + uint32_t charCode;
1.4670 + aDOMKeyEvent->GetCharCode(&charCode);
1.4671 + if (charCode) {
1.4672 + nsShortcutCandidate key(charCode, false);
1.4673 + aCandidates.AppendElement(key);
1.4674 + }
1.4675 + }
1.4676 +}
1.4677 +
1.4678 +/* static */
1.4679 +void
1.4680 +nsContentUtils::GetAccessKeyCandidates(WidgetKeyboardEvent* aNativeKeyEvent,
1.4681 + nsTArray<uint32_t>& aCandidates)
1.4682 +{
1.4683 + NS_PRECONDITION(aCandidates.IsEmpty(), "aCandidates must be empty");
1.4684 +
1.4685 + // return the lower cased charCode candidates for access keys.
1.4686 + // the priority of the charCodes are:
1.4687 + // 0: charCode, 1: unshiftedCharCodes[0], 2: shiftedCharCodes[0]
1.4688 + // 3: unshiftedCharCodes[1], 4: shiftedCharCodes[1],...
1.4689 + if (aNativeKeyEvent->charCode) {
1.4690 + uint32_t ch = aNativeKeyEvent->charCode;
1.4691 + if (IS_IN_BMP(ch))
1.4692 + ch = ToLowerCase(char16_t(ch));
1.4693 + aCandidates.AppendElement(ch);
1.4694 + }
1.4695 + for (uint32_t i = 0;
1.4696 + i < aNativeKeyEvent->alternativeCharCodes.Length(); ++i) {
1.4697 + uint32_t ch[2] =
1.4698 + { aNativeKeyEvent->alternativeCharCodes[i].mUnshiftedCharCode,
1.4699 + aNativeKeyEvent->alternativeCharCodes[i].mShiftedCharCode };
1.4700 + for (uint32_t j = 0; j < 2; ++j) {
1.4701 + if (!ch[j])
1.4702 + continue;
1.4703 + if (IS_IN_BMP(ch[j]))
1.4704 + ch[j] = ToLowerCase(char16_t(ch[j]));
1.4705 + // Don't append the charCode that was already appended.
1.4706 + if (aCandidates.IndexOf(ch[j]) == aCandidates.NoIndex)
1.4707 + aCandidates.AppendElement(ch[j]);
1.4708 + }
1.4709 + }
1.4710 + return;
1.4711 +}
1.4712 +
1.4713 +/* static */
1.4714 +void
1.4715 +nsContentUtils::AddScriptBlocker()
1.4716 +{
1.4717 + if (!sScriptBlockerCount) {
1.4718 + NS_ASSERTION(sRunnersCountAtFirstBlocker == 0,
1.4719 + "Should not already have a count");
1.4720 + sRunnersCountAtFirstBlocker = sBlockedScriptRunners->Length();
1.4721 + }
1.4722 + ++sScriptBlockerCount;
1.4723 +}
1.4724 +
1.4725 +#ifdef DEBUG
1.4726 +static bool sRemovingScriptBlockers = false;
1.4727 +#endif
1.4728 +
1.4729 +/* static */
1.4730 +void
1.4731 +nsContentUtils::RemoveScriptBlocker()
1.4732 +{
1.4733 + MOZ_ASSERT(!sRemovingScriptBlockers);
1.4734 + NS_ASSERTION(sScriptBlockerCount != 0, "Negative script blockers");
1.4735 + --sScriptBlockerCount;
1.4736 + if (sScriptBlockerCount) {
1.4737 + return;
1.4738 + }
1.4739 +
1.4740 + uint32_t firstBlocker = sRunnersCountAtFirstBlocker;
1.4741 + uint32_t lastBlocker = sBlockedScriptRunners->Length();
1.4742 + uint32_t originalFirstBlocker = firstBlocker;
1.4743 + uint32_t blockersCount = lastBlocker - firstBlocker;
1.4744 + sRunnersCountAtFirstBlocker = 0;
1.4745 + NS_ASSERTION(firstBlocker <= lastBlocker,
1.4746 + "bad sRunnersCountAtFirstBlocker");
1.4747 +
1.4748 + while (firstBlocker < lastBlocker) {
1.4749 + nsCOMPtr<nsIRunnable> runnable;
1.4750 + runnable.swap((*sBlockedScriptRunners)[firstBlocker]);
1.4751 + ++firstBlocker;
1.4752 +
1.4753 + // Calling the runnable can reenter us
1.4754 + runnable->Run();
1.4755 + // So can dropping the reference to the runnable
1.4756 + runnable = nullptr;
1.4757 +
1.4758 + NS_ASSERTION(sRunnersCountAtFirstBlocker == 0,
1.4759 + "Bad count");
1.4760 + NS_ASSERTION(!sScriptBlockerCount, "This is really bad");
1.4761 + }
1.4762 +#ifdef DEBUG
1.4763 + AutoRestore<bool> removingScriptBlockers(sRemovingScriptBlockers);
1.4764 + sRemovingScriptBlockers = true;
1.4765 +#endif
1.4766 + sBlockedScriptRunners->RemoveElementsAt(originalFirstBlocker, blockersCount);
1.4767 +}
1.4768 +
1.4769 +/* static */
1.4770 +bool
1.4771 +nsContentUtils::AddScriptRunner(nsIRunnable* aRunnable)
1.4772 +{
1.4773 + if (!aRunnable) {
1.4774 + return false;
1.4775 + }
1.4776 +
1.4777 + if (sScriptBlockerCount) {
1.4778 + return sBlockedScriptRunners->AppendElement(aRunnable) != nullptr;
1.4779 + }
1.4780 +
1.4781 + nsCOMPtr<nsIRunnable> run = aRunnable;
1.4782 + run->Run();
1.4783 +
1.4784 + return true;
1.4785 +}
1.4786 +
1.4787 +void
1.4788 +nsContentUtils::EnterMicroTask()
1.4789 +{
1.4790 + MOZ_ASSERT(NS_IsMainThread());
1.4791 + ++sMicroTaskLevel;
1.4792 +}
1.4793 +
1.4794 +void
1.4795 +nsContentUtils::LeaveMicroTask()
1.4796 +{
1.4797 + MOZ_ASSERT(NS_IsMainThread());
1.4798 + if (--sMicroTaskLevel == 0) {
1.4799 + nsDOMMutationObserver::HandleMutations();
1.4800 + nsDocument::ProcessBaseElementQueue();
1.4801 + }
1.4802 +}
1.4803 +
1.4804 +bool
1.4805 +nsContentUtils::IsInMicroTask()
1.4806 +{
1.4807 + MOZ_ASSERT(NS_IsMainThread());
1.4808 + return sMicroTaskLevel != 0;
1.4809 +}
1.4810 +
1.4811 +uint32_t
1.4812 +nsContentUtils::MicroTaskLevel()
1.4813 +{
1.4814 + MOZ_ASSERT(NS_IsMainThread());
1.4815 + return sMicroTaskLevel;
1.4816 +}
1.4817 +
1.4818 +void
1.4819 +nsContentUtils::SetMicroTaskLevel(uint32_t aLevel)
1.4820 +{
1.4821 + MOZ_ASSERT(NS_IsMainThread());
1.4822 + sMicroTaskLevel = aLevel;
1.4823 +}
1.4824 +
1.4825 +/*
1.4826 + * Helper function for nsContentUtils::ProcessViewportInfo.
1.4827 + *
1.4828 + * Handles a single key=value pair. If it corresponds to a valid viewport
1.4829 + * attribute, add it to the document header data. No validation is done on the
1.4830 + * value itself (this is done at display time).
1.4831 + */
1.4832 +static void ProcessViewportToken(nsIDocument *aDocument,
1.4833 + const nsAString &token) {
1.4834 +
1.4835 + /* Iterators. */
1.4836 + nsAString::const_iterator tip, tail, end;
1.4837 + token.BeginReading(tip);
1.4838 + tail = tip;
1.4839 + token.EndReading(end);
1.4840 +
1.4841 + /* Move tip to the '='. */
1.4842 + while ((tip != end) && (*tip != '='))
1.4843 + ++tip;
1.4844 +
1.4845 + /* If we didn't find an '=', punt. */
1.4846 + if (tip == end)
1.4847 + return;
1.4848 +
1.4849 + /* Extract the key and value. */
1.4850 + const nsAString &key =
1.4851 + nsContentUtils::TrimWhitespace<nsCRT::IsAsciiSpace>(Substring(tail, tip),
1.4852 + true);
1.4853 + const nsAString &value =
1.4854 + nsContentUtils::TrimWhitespace<nsCRT::IsAsciiSpace>(Substring(++tip, end),
1.4855 + true);
1.4856 +
1.4857 + /* Check for known keys. If we find a match, insert the appropriate
1.4858 + * information into the document header. */
1.4859 + nsCOMPtr<nsIAtom> key_atom = do_GetAtom(key);
1.4860 + if (key_atom == nsGkAtoms::height)
1.4861 + aDocument->SetHeaderData(nsGkAtoms::viewport_height, value);
1.4862 + else if (key_atom == nsGkAtoms::width)
1.4863 + aDocument->SetHeaderData(nsGkAtoms::viewport_width, value);
1.4864 + else if (key_atom == nsGkAtoms::initial_scale)
1.4865 + aDocument->SetHeaderData(nsGkAtoms::viewport_initial_scale, value);
1.4866 + else if (key_atom == nsGkAtoms::minimum_scale)
1.4867 + aDocument->SetHeaderData(nsGkAtoms::viewport_minimum_scale, value);
1.4868 + else if (key_atom == nsGkAtoms::maximum_scale)
1.4869 + aDocument->SetHeaderData(nsGkAtoms::viewport_maximum_scale, value);
1.4870 + else if (key_atom == nsGkAtoms::user_scalable)
1.4871 + aDocument->SetHeaderData(nsGkAtoms::viewport_user_scalable, value);
1.4872 +}
1.4873 +
1.4874 +#define IS_SEPARATOR(c) ((c == '=') || (c == ',') || (c == ';') || \
1.4875 + (c == '\t') || (c == '\n') || (c == '\r'))
1.4876 +
1.4877 +/* static */
1.4878 +nsViewportInfo
1.4879 +nsContentUtils::GetViewportInfo(nsIDocument *aDocument,
1.4880 + const ScreenIntSize& aDisplaySize)
1.4881 +{
1.4882 + return aDocument->GetViewportInfo(aDisplaySize);
1.4883 +}
1.4884 +
1.4885 +/* static */
1.4886 +nsresult
1.4887 +nsContentUtils::ProcessViewportInfo(nsIDocument *aDocument,
1.4888 + const nsAString &viewportInfo) {
1.4889 +
1.4890 + /* We never fail. */
1.4891 + nsresult rv = NS_OK;
1.4892 +
1.4893 + aDocument->SetHeaderData(nsGkAtoms::viewport, viewportInfo);
1.4894 +
1.4895 + /* Iterators. */
1.4896 + nsAString::const_iterator tip, tail, end;
1.4897 + viewportInfo.BeginReading(tip);
1.4898 + tail = tip;
1.4899 + viewportInfo.EndReading(end);
1.4900 +
1.4901 + /* Read the tip to the first non-separator character. */
1.4902 + while ((tip != end) && (IS_SEPARATOR(*tip) || nsCRT::IsAsciiSpace(*tip)))
1.4903 + ++tip;
1.4904 +
1.4905 + /* Read through and find tokens separated by separators. */
1.4906 + while (tip != end) {
1.4907 +
1.4908 + /* Synchronize tip and tail. */
1.4909 + tail = tip;
1.4910 +
1.4911 + /* Advance tip past non-separator characters. */
1.4912 + while ((tip != end) && !IS_SEPARATOR(*tip))
1.4913 + ++tip;
1.4914 +
1.4915 + /* Allow white spaces that surround the '=' character */
1.4916 + if ((tip != end) && (*tip == '=')) {
1.4917 + ++tip;
1.4918 +
1.4919 + while ((tip != end) && nsCRT::IsAsciiSpace(*tip))
1.4920 + ++tip;
1.4921 +
1.4922 + while ((tip != end) && !(IS_SEPARATOR(*tip) || nsCRT::IsAsciiSpace(*tip)))
1.4923 + ++tip;
1.4924 + }
1.4925 +
1.4926 + /* Our token consists of the characters between tail and tip. */
1.4927 + ProcessViewportToken(aDocument, Substring(tail, tip));
1.4928 +
1.4929 + /* Skip separators. */
1.4930 + while ((tip != end) && (IS_SEPARATOR(*tip) || nsCRT::IsAsciiSpace(*tip)))
1.4931 + ++tip;
1.4932 + }
1.4933 +
1.4934 + return rv;
1.4935 +
1.4936 +}
1.4937 +
1.4938 +#undef IS_SEPARATOR
1.4939 +
1.4940 +/* static */
1.4941 +void
1.4942 +nsContentUtils::HidePopupsInDocument(nsIDocument* aDocument)
1.4943 +{
1.4944 +#ifdef MOZ_XUL
1.4945 + nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
1.4946 + if (pm && aDocument) {
1.4947 + nsCOMPtr<nsIDocShellTreeItem> docShellToHide = aDocument->GetDocShell();
1.4948 + if (docShellToHide)
1.4949 + pm->HidePopupsInDocShell(docShellToHide);
1.4950 + }
1.4951 +#endif
1.4952 +}
1.4953 +
1.4954 +/* static */
1.4955 +already_AddRefed<nsIDragSession>
1.4956 +nsContentUtils::GetDragSession()
1.4957 +{
1.4958 + nsCOMPtr<nsIDragSession> dragSession;
1.4959 + nsCOMPtr<nsIDragService> dragService =
1.4960 + do_GetService("@mozilla.org/widget/dragservice;1");
1.4961 + if (dragService)
1.4962 + dragService->GetCurrentSession(getter_AddRefs(dragSession));
1.4963 + return dragSession.forget();
1.4964 +}
1.4965 +
1.4966 +/* static */
1.4967 +nsresult
1.4968 +nsContentUtils::SetDataTransferInEvent(WidgetDragEvent* aDragEvent)
1.4969 +{
1.4970 + if (aDragEvent->dataTransfer || !aDragEvent->mFlags.mIsTrusted)
1.4971 + return NS_OK;
1.4972 +
1.4973 + // For draggesture and dragstart events, the data transfer object is
1.4974 + // created before the event fires, so it should already be set. For other
1.4975 + // drag events, get the object from the drag session.
1.4976 + NS_ASSERTION(aDragEvent->message != NS_DRAGDROP_GESTURE &&
1.4977 + aDragEvent->message != NS_DRAGDROP_START,
1.4978 + "draggesture event created without a dataTransfer");
1.4979 +
1.4980 + nsCOMPtr<nsIDragSession> dragSession = GetDragSession();
1.4981 + NS_ENSURE_TRUE(dragSession, NS_OK); // no drag in progress
1.4982 +
1.4983 + nsCOMPtr<nsIDOMDataTransfer> dataTransfer;
1.4984 + nsCOMPtr<DataTransfer> initialDataTransfer;
1.4985 + dragSession->GetDataTransfer(getter_AddRefs(dataTransfer));
1.4986 + if (dataTransfer) {
1.4987 + initialDataTransfer = do_QueryInterface(dataTransfer);
1.4988 + if (!initialDataTransfer) {
1.4989 + return NS_ERROR_FAILURE;
1.4990 + }
1.4991 + } else {
1.4992 + // A dataTransfer won't exist when a drag was started by some other
1.4993 + // means, for instance calling the drag service directly, or a drag
1.4994 + // from another application. In either case, a new dataTransfer should
1.4995 + // be created that reflects the data.
1.4996 + initialDataTransfer = new DataTransfer(aDragEvent->target, aDragEvent->message, true, -1);
1.4997 +
1.4998 + // now set it in the drag session so we don't need to create it again
1.4999 + dragSession->SetDataTransfer(initialDataTransfer);
1.5000 + }
1.5001 +
1.5002 + bool isCrossDomainSubFrameDrop = false;
1.5003 + if (aDragEvent->message == NS_DRAGDROP_DROP ||
1.5004 + aDragEvent->message == NS_DRAGDROP_DRAGDROP) {
1.5005 + isCrossDomainSubFrameDrop = CheckForSubFrameDrop(dragSession, aDragEvent);
1.5006 + }
1.5007 +
1.5008 + // each event should use a clone of the original dataTransfer.
1.5009 + initialDataTransfer->Clone(aDragEvent->target, aDragEvent->message, aDragEvent->userCancelled,
1.5010 + isCrossDomainSubFrameDrop,
1.5011 + getter_AddRefs(aDragEvent->dataTransfer));
1.5012 + NS_ENSURE_TRUE(aDragEvent->dataTransfer, NS_ERROR_OUT_OF_MEMORY);
1.5013 +
1.5014 + // for the dragenter and dragover events, initialize the drop effect
1.5015 + // from the drop action, which platform specific widget code sets before
1.5016 + // the event is fired based on the keyboard state.
1.5017 + if (aDragEvent->message == NS_DRAGDROP_ENTER ||
1.5018 + aDragEvent->message == NS_DRAGDROP_OVER) {
1.5019 + uint32_t action, effectAllowed;
1.5020 + dragSession->GetDragAction(&action);
1.5021 + aDragEvent->dataTransfer->GetEffectAllowedInt(&effectAllowed);
1.5022 + aDragEvent->dataTransfer->SetDropEffectInt(FilterDropEffect(action, effectAllowed));
1.5023 + }
1.5024 + else if (aDragEvent->message == NS_DRAGDROP_DROP ||
1.5025 + aDragEvent->message == NS_DRAGDROP_DRAGDROP ||
1.5026 + aDragEvent->message == NS_DRAGDROP_END) {
1.5027 + // For the drop and dragend events, set the drop effect based on the
1.5028 + // last value that the dropEffect had. This will have been set in
1.5029 + // EventStateManager::PostHandleEvent for the last dragenter or
1.5030 + // dragover event.
1.5031 + uint32_t dropEffect;
1.5032 + initialDataTransfer->GetDropEffectInt(&dropEffect);
1.5033 + aDragEvent->dataTransfer->SetDropEffectInt(dropEffect);
1.5034 + }
1.5035 +
1.5036 + return NS_OK;
1.5037 +}
1.5038 +
1.5039 +/* static */
1.5040 +uint32_t
1.5041 +nsContentUtils::FilterDropEffect(uint32_t aAction, uint32_t aEffectAllowed)
1.5042 +{
1.5043 + // It is possible for the drag action to include more than one action, but
1.5044 + // the widget code which sets the action from the keyboard state should only
1.5045 + // be including one. If multiple actions were set, we just consider them in
1.5046 + // the following order:
1.5047 + // copy, link, move
1.5048 + if (aAction & nsIDragService::DRAGDROP_ACTION_COPY)
1.5049 + aAction = nsIDragService::DRAGDROP_ACTION_COPY;
1.5050 + else if (aAction & nsIDragService::DRAGDROP_ACTION_LINK)
1.5051 + aAction = nsIDragService::DRAGDROP_ACTION_LINK;
1.5052 + else if (aAction & nsIDragService::DRAGDROP_ACTION_MOVE)
1.5053 + aAction = nsIDragService::DRAGDROP_ACTION_MOVE;
1.5054 +
1.5055 + // Filter the action based on the effectAllowed. If the effectAllowed
1.5056 + // doesn't include the action, then that action cannot be done, so adjust
1.5057 + // the action to something that is allowed. For a copy, adjust to move or
1.5058 + // link. For a move, adjust to copy or link. For a link, adjust to move or
1.5059 + // link. Otherwise, use none.
1.5060 + if (aAction & aEffectAllowed ||
1.5061 + aEffectAllowed == nsIDragService::DRAGDROP_ACTION_UNINITIALIZED)
1.5062 + return aAction;
1.5063 + if (aEffectAllowed & nsIDragService::DRAGDROP_ACTION_MOVE)
1.5064 + return nsIDragService::DRAGDROP_ACTION_MOVE;
1.5065 + if (aEffectAllowed & nsIDragService::DRAGDROP_ACTION_COPY)
1.5066 + return nsIDragService::DRAGDROP_ACTION_COPY;
1.5067 + if (aEffectAllowed & nsIDragService::DRAGDROP_ACTION_LINK)
1.5068 + return nsIDragService::DRAGDROP_ACTION_LINK;
1.5069 + return nsIDragService::DRAGDROP_ACTION_NONE;
1.5070 +}
1.5071 +
1.5072 +/* static */
1.5073 +bool
1.5074 +nsContentUtils::CheckForSubFrameDrop(nsIDragSession* aDragSession,
1.5075 + WidgetDragEvent* aDropEvent)
1.5076 +{
1.5077 + nsCOMPtr<nsIContent> target = do_QueryInterface(aDropEvent->originalTarget);
1.5078 + if (!target) {
1.5079 + return true;
1.5080 + }
1.5081 +
1.5082 + nsIDocument* targetDoc = target->OwnerDoc();
1.5083 + nsCOMPtr<nsIWebNavigation> twebnav = do_GetInterface(targetDoc->GetWindow());
1.5084 + nsCOMPtr<nsIDocShellTreeItem> tdsti = do_QueryInterface(twebnav);
1.5085 + if (!tdsti) {
1.5086 + return true;
1.5087 + }
1.5088 +
1.5089 + // Always allow dropping onto chrome shells.
1.5090 + if (tdsti->ItemType() == nsIDocShellTreeItem::typeChrome) {
1.5091 + return false;
1.5092 + }
1.5093 +
1.5094 + // If there is no source node, then this is a drag from another
1.5095 + // application, which should be allowed.
1.5096 + nsCOMPtr<nsIDOMDocument> sourceDocument;
1.5097 + aDragSession->GetSourceDocument(getter_AddRefs(sourceDocument));
1.5098 + nsCOMPtr<nsIDocument> doc = do_QueryInterface(sourceDocument);
1.5099 + if (doc) {
1.5100 + // Get each successive parent of the source document and compare it to
1.5101 + // the drop document. If they match, then this is a drag from a child frame.
1.5102 + do {
1.5103 + doc = doc->GetParentDocument();
1.5104 + if (doc == targetDoc) {
1.5105 + // The drag is from a child frame.
1.5106 + return true;
1.5107 + }
1.5108 + } while (doc);
1.5109 + }
1.5110 +
1.5111 + return false;
1.5112 +}
1.5113 +
1.5114 +/* static */
1.5115 +bool
1.5116 +nsContentUtils::URIIsLocalFile(nsIURI *aURI)
1.5117 +{
1.5118 + bool isFile;
1.5119 + nsCOMPtr<nsINetUtil> util = do_QueryInterface(sIOService);
1.5120 +
1.5121 + // Important: we do NOT test the entire URI chain here!
1.5122 + return util && NS_SUCCEEDED(util->ProtocolHasFlags(aURI,
1.5123 + nsIProtocolHandler::URI_IS_LOCAL_FILE,
1.5124 + &isFile)) &&
1.5125 + isFile;
1.5126 +}
1.5127 +
1.5128 +nsresult
1.5129 +nsContentUtils::SplitURIAtHash(nsIURI *aURI,
1.5130 + nsACString &aBeforeHash,
1.5131 + nsACString &aAfterHash)
1.5132 +{
1.5133 + // See bug 225910 for why we can't do this using nsIURL.
1.5134 +
1.5135 + aBeforeHash.Truncate();
1.5136 + aAfterHash.Truncate();
1.5137 +
1.5138 + NS_ENSURE_ARG_POINTER(aURI);
1.5139 +
1.5140 + nsAutoCString spec;
1.5141 + nsresult rv = aURI->GetSpec(spec);
1.5142 + NS_ENSURE_SUCCESS(rv, rv);
1.5143 +
1.5144 + int32_t index = spec.FindChar('#');
1.5145 + if (index == -1) {
1.5146 + index = spec.Length();
1.5147 + }
1.5148 +
1.5149 + aBeforeHash.Assign(Substring(spec, 0, index));
1.5150 + aAfterHash.Assign(Substring(spec, index));
1.5151 + return NS_OK;
1.5152 +}
1.5153 +
1.5154 +/* static */
1.5155 +nsIScriptContext*
1.5156 +nsContentUtils::GetContextForEventHandlers(nsINode* aNode,
1.5157 + nsresult* aRv)
1.5158 +{
1.5159 + *aRv = NS_OK;
1.5160 + bool hasHadScriptObject = true;
1.5161 + nsIScriptGlobalObject* sgo =
1.5162 + aNode->OwnerDoc()->GetScriptHandlingObject(hasHadScriptObject);
1.5163 + // It is bad if the document doesn't have event handling context,
1.5164 + // but it used to have one.
1.5165 + if (!sgo && hasHadScriptObject) {
1.5166 + *aRv = NS_ERROR_UNEXPECTED;
1.5167 + return nullptr;
1.5168 + }
1.5169 +
1.5170 + if (sgo) {
1.5171 + nsIScriptContext* scx = sgo->GetContext();
1.5172 + // Bad, no context from script global object!
1.5173 + if (!scx) {
1.5174 + *aRv = NS_ERROR_UNEXPECTED;
1.5175 + return nullptr;
1.5176 + }
1.5177 + return scx;
1.5178 + }
1.5179 +
1.5180 + return nullptr;
1.5181 +}
1.5182 +
1.5183 +/* static */
1.5184 +JSContext *
1.5185 +nsContentUtils::GetCurrentJSContext()
1.5186 +{
1.5187 + MOZ_ASSERT(NS_IsMainThread());
1.5188 + return sXPConnect->GetCurrentJSContext();
1.5189 +}
1.5190 +
1.5191 +/* static */
1.5192 +JSContext *
1.5193 +nsContentUtils::GetSafeJSContext()
1.5194 +{
1.5195 + MOZ_ASSERT(NS_IsMainThread());
1.5196 + return sXPConnect->GetSafeJSContext();
1.5197 +}
1.5198 +
1.5199 +/* static */
1.5200 +JSContext *
1.5201 +nsContentUtils::GetDefaultJSContextForThread()
1.5202 +{
1.5203 + if (MOZ_LIKELY(NS_IsMainThread())) {
1.5204 + return GetSafeJSContext();
1.5205 + } else {
1.5206 + return workers::GetCurrentThreadJSContext();
1.5207 + }
1.5208 +}
1.5209 +
1.5210 +/* static */
1.5211 +JSContext *
1.5212 +nsContentUtils::GetCurrentJSContextForThread()
1.5213 +{
1.5214 + if (MOZ_LIKELY(NS_IsMainThread())) {
1.5215 + return GetCurrentJSContext();
1.5216 + } else {
1.5217 + return workers::GetCurrentThreadJSContext();
1.5218 + }
1.5219 +}
1.5220 +
1.5221 +/* static */
1.5222 +nsresult
1.5223 +nsContentUtils::ASCIIToLower(nsAString& aStr)
1.5224 +{
1.5225 + char16_t* iter = aStr.BeginWriting();
1.5226 + char16_t* end = aStr.EndWriting();
1.5227 + if (MOZ_UNLIKELY(!iter || !end)) {
1.5228 + return NS_ERROR_OUT_OF_MEMORY;
1.5229 + }
1.5230 + while (iter != end) {
1.5231 + char16_t c = *iter;
1.5232 + if (c >= 'A' && c <= 'Z') {
1.5233 + *iter = c + ('a' - 'A');
1.5234 + }
1.5235 + ++iter;
1.5236 + }
1.5237 + return NS_OK;
1.5238 +}
1.5239 +
1.5240 +/* static */
1.5241 +nsresult
1.5242 +nsContentUtils::ASCIIToLower(const nsAString& aSource, nsAString& aDest)
1.5243 +{
1.5244 + uint32_t len = aSource.Length();
1.5245 + aDest.SetLength(len);
1.5246 + if (aDest.Length() == len) {
1.5247 + char16_t* dest = aDest.BeginWriting();
1.5248 + if (MOZ_UNLIKELY(!dest)) {
1.5249 + return NS_ERROR_OUT_OF_MEMORY;
1.5250 + }
1.5251 + const char16_t* iter = aSource.BeginReading();
1.5252 + const char16_t* end = aSource.EndReading();
1.5253 + while (iter != end) {
1.5254 + char16_t c = *iter;
1.5255 + *dest = (c >= 'A' && c <= 'Z') ?
1.5256 + c + ('a' - 'A') : c;
1.5257 + ++iter;
1.5258 + ++dest;
1.5259 + }
1.5260 + return NS_OK;
1.5261 + }
1.5262 + return NS_ERROR_OUT_OF_MEMORY;
1.5263 +}
1.5264 +
1.5265 +/* static */
1.5266 +nsresult
1.5267 +nsContentUtils::ASCIIToUpper(nsAString& aStr)
1.5268 +{
1.5269 + char16_t* iter = aStr.BeginWriting();
1.5270 + char16_t* end = aStr.EndWriting();
1.5271 + if (MOZ_UNLIKELY(!iter || !end)) {
1.5272 + return NS_ERROR_OUT_OF_MEMORY;
1.5273 + }
1.5274 + while (iter != end) {
1.5275 + char16_t c = *iter;
1.5276 + if (c >= 'a' && c <= 'z') {
1.5277 + *iter = c + ('A' - 'a');
1.5278 + }
1.5279 + ++iter;
1.5280 + }
1.5281 + return NS_OK;
1.5282 +}
1.5283 +
1.5284 +/* static */
1.5285 +nsresult
1.5286 +nsContentUtils::ASCIIToUpper(const nsAString& aSource, nsAString& aDest)
1.5287 +{
1.5288 + uint32_t len = aSource.Length();
1.5289 + aDest.SetLength(len);
1.5290 + if (aDest.Length() == len) {
1.5291 + char16_t* dest = aDest.BeginWriting();
1.5292 + if (MOZ_UNLIKELY(!dest)) {
1.5293 + return NS_ERROR_OUT_OF_MEMORY;
1.5294 + }
1.5295 + const char16_t* iter = aSource.BeginReading();
1.5296 + const char16_t* end = aSource.EndReading();
1.5297 + while (iter != end) {
1.5298 + char16_t c = *iter;
1.5299 + *dest = (c >= 'a' && c <= 'z') ?
1.5300 + c + ('A' - 'a') : c;
1.5301 + ++iter;
1.5302 + ++dest;
1.5303 + }
1.5304 + return NS_OK;
1.5305 + }
1.5306 + return NS_ERROR_OUT_OF_MEMORY;
1.5307 +}
1.5308 +
1.5309 +/* static */
1.5310 +bool
1.5311 +nsContentUtils::EqualsIgnoreASCIICase(const nsAString& aStr1,
1.5312 + const nsAString& aStr2)
1.5313 +{
1.5314 + uint32_t len = aStr1.Length();
1.5315 + if (len != aStr2.Length()) {
1.5316 + return false;
1.5317 + }
1.5318 +
1.5319 + const char16_t* str1 = aStr1.BeginReading();
1.5320 + const char16_t* str2 = aStr2.BeginReading();
1.5321 + const char16_t* end = str1 + len;
1.5322 +
1.5323 + while (str1 < end) {
1.5324 + char16_t c1 = *str1++;
1.5325 + char16_t c2 = *str2++;
1.5326 +
1.5327 + // First check if any bits other than the 0x0020 differs
1.5328 + if ((c1 ^ c2) & 0xffdf) {
1.5329 + return false;
1.5330 + }
1.5331 +
1.5332 + // We know they can only differ in the 0x0020 bit.
1.5333 + // Likely the two chars are the same, so check that first
1.5334 + if (c1 != c2) {
1.5335 + // They do differ, but since it's only in the 0x0020 bit, check if it's
1.5336 + // the same ascii char, but just differing in case
1.5337 + char16_t c1Upper = c1 & 0xffdf;
1.5338 + if (!('A' <= c1Upper && c1Upper <= 'Z')) {
1.5339 + return false;
1.5340 + }
1.5341 + }
1.5342 + }
1.5343 +
1.5344 + return true;
1.5345 +}
1.5346 +
1.5347 +/* static */
1.5348 +bool
1.5349 +nsContentUtils::StringContainsASCIIUpper(const nsAString& aStr)
1.5350 +{
1.5351 + const char16_t* iter = aStr.BeginReading();
1.5352 + const char16_t* end = aStr.EndReading();
1.5353 + while (iter != end) {
1.5354 + char16_t c = *iter;
1.5355 + if (c >= 'A' && c <= 'Z') {
1.5356 + return true;
1.5357 + }
1.5358 + ++iter;
1.5359 + }
1.5360 +
1.5361 + return false;
1.5362 +}
1.5363 +
1.5364 +/* static */
1.5365 +nsIInterfaceRequestor*
1.5366 +nsContentUtils::GetSameOriginChecker()
1.5367 +{
1.5368 + if (!sSameOriginChecker) {
1.5369 + sSameOriginChecker = new SameOriginChecker();
1.5370 + NS_IF_ADDREF(sSameOriginChecker);
1.5371 + }
1.5372 + return sSameOriginChecker;
1.5373 +}
1.5374 +
1.5375 +/* static */
1.5376 +nsresult
1.5377 +nsContentUtils::CheckSameOrigin(nsIChannel *aOldChannel, nsIChannel *aNewChannel)
1.5378 +{
1.5379 + if (!nsContentUtils::GetSecurityManager())
1.5380 + return NS_ERROR_NOT_AVAILABLE;
1.5381 +
1.5382 + nsCOMPtr<nsIPrincipal> oldPrincipal;
1.5383 + nsContentUtils::GetSecurityManager()->
1.5384 + GetChannelPrincipal(aOldChannel, getter_AddRefs(oldPrincipal));
1.5385 +
1.5386 + nsCOMPtr<nsIURI> newURI;
1.5387 + aNewChannel->GetURI(getter_AddRefs(newURI));
1.5388 + nsCOMPtr<nsIURI> newOriginalURI;
1.5389 + aNewChannel->GetOriginalURI(getter_AddRefs(newOriginalURI));
1.5390 +
1.5391 + NS_ENSURE_STATE(oldPrincipal && newURI && newOriginalURI);
1.5392 +
1.5393 + nsresult rv = oldPrincipal->CheckMayLoad(newURI, false, false);
1.5394 + if (NS_SUCCEEDED(rv) && newOriginalURI != newURI) {
1.5395 + rv = oldPrincipal->CheckMayLoad(newOriginalURI, false, false);
1.5396 + }
1.5397 +
1.5398 + return rv;
1.5399 +}
1.5400 +
1.5401 +NS_IMPL_ISUPPORTS(SameOriginChecker,
1.5402 + nsIChannelEventSink,
1.5403 + nsIInterfaceRequestor)
1.5404 +
1.5405 +NS_IMETHODIMP
1.5406 +SameOriginChecker::AsyncOnChannelRedirect(nsIChannel *aOldChannel,
1.5407 + nsIChannel *aNewChannel,
1.5408 + uint32_t aFlags,
1.5409 + nsIAsyncVerifyRedirectCallback *cb)
1.5410 +{
1.5411 + NS_PRECONDITION(aNewChannel, "Redirecting to null channel?");
1.5412 +
1.5413 + nsresult rv = nsContentUtils::CheckSameOrigin(aOldChannel, aNewChannel);
1.5414 + if (NS_SUCCEEDED(rv)) {
1.5415 + cb->OnRedirectVerifyCallback(NS_OK);
1.5416 + }
1.5417 +
1.5418 + return rv;
1.5419 +}
1.5420 +
1.5421 +NS_IMETHODIMP
1.5422 +SameOriginChecker::GetInterface(const nsIID & aIID, void **aResult)
1.5423 +{
1.5424 + return QueryInterface(aIID, aResult);
1.5425 +}
1.5426 +
1.5427 +/* static */
1.5428 +nsresult
1.5429 +nsContentUtils::GetASCIIOrigin(nsIPrincipal* aPrincipal, nsCString& aOrigin)
1.5430 +{
1.5431 + NS_PRECONDITION(aPrincipal, "missing principal");
1.5432 +
1.5433 + aOrigin.Truncate();
1.5434 +
1.5435 + nsCOMPtr<nsIURI> uri;
1.5436 + nsresult rv = aPrincipal->GetURI(getter_AddRefs(uri));
1.5437 + NS_ENSURE_SUCCESS(rv, rv);
1.5438 +
1.5439 + if (uri) {
1.5440 + return GetASCIIOrigin(uri, aOrigin);
1.5441 + }
1.5442 +
1.5443 + aOrigin.AssignLiteral("null");
1.5444 +
1.5445 + return NS_OK;
1.5446 +}
1.5447 +
1.5448 +/* static */
1.5449 +nsresult
1.5450 +nsContentUtils::GetASCIIOrigin(nsIURI* aURI, nsCString& aOrigin)
1.5451 +{
1.5452 + NS_PRECONDITION(aURI, "missing uri");
1.5453 +
1.5454 + aOrigin.Truncate();
1.5455 +
1.5456 + nsCOMPtr<nsIURI> uri = NS_GetInnermostURI(aURI);
1.5457 + NS_ENSURE_TRUE(uri, NS_ERROR_UNEXPECTED);
1.5458 +
1.5459 + nsCString host;
1.5460 + nsresult rv = uri->GetAsciiHost(host);
1.5461 +
1.5462 + if (NS_SUCCEEDED(rv) && !host.IsEmpty()) {
1.5463 + nsCString scheme;
1.5464 + rv = uri->GetScheme(scheme);
1.5465 + NS_ENSURE_SUCCESS(rv, rv);
1.5466 +
1.5467 + int32_t port = -1;
1.5468 + uri->GetPort(&port);
1.5469 + if (port != -1 && port == NS_GetDefaultPort(scheme.get()))
1.5470 + port = -1;
1.5471 +
1.5472 + nsCString hostPort;
1.5473 + rv = NS_GenerateHostPort(host, port, hostPort);
1.5474 + NS_ENSURE_SUCCESS(rv, rv);
1.5475 +
1.5476 + aOrigin = scheme + NS_LITERAL_CSTRING("://") + hostPort;
1.5477 + }
1.5478 + else {
1.5479 + aOrigin.AssignLiteral("null");
1.5480 + }
1.5481 +
1.5482 + return NS_OK;
1.5483 +}
1.5484 +
1.5485 +/* static */
1.5486 +nsresult
1.5487 +nsContentUtils::GetUTFOrigin(nsIPrincipal* aPrincipal, nsString& aOrigin)
1.5488 +{
1.5489 + NS_PRECONDITION(aPrincipal, "missing principal");
1.5490 +
1.5491 + aOrigin.Truncate();
1.5492 +
1.5493 + nsCOMPtr<nsIURI> uri;
1.5494 + nsresult rv = aPrincipal->GetURI(getter_AddRefs(uri));
1.5495 + NS_ENSURE_SUCCESS(rv, rv);
1.5496 +
1.5497 + if (uri) {
1.5498 + return GetUTFOrigin(uri, aOrigin);
1.5499 + }
1.5500 +
1.5501 + aOrigin.AssignLiteral("null");
1.5502 +
1.5503 + return NS_OK;
1.5504 +}
1.5505 +
1.5506 +/* static */
1.5507 +nsresult
1.5508 +nsContentUtils::GetUTFOrigin(nsIURI* aURI, nsString& aOrigin)
1.5509 +{
1.5510 + NS_PRECONDITION(aURI, "missing uri");
1.5511 +
1.5512 + aOrigin.Truncate();
1.5513 +
1.5514 + nsCOMPtr<nsIURI> uri = NS_GetInnermostURI(aURI);
1.5515 + NS_ENSURE_TRUE(uri, NS_ERROR_UNEXPECTED);
1.5516 +
1.5517 + nsCString host;
1.5518 + nsresult rv = uri->GetHost(host);
1.5519 +
1.5520 + if (NS_SUCCEEDED(rv) && !host.IsEmpty()) {
1.5521 + nsCString scheme;
1.5522 + rv = uri->GetScheme(scheme);
1.5523 + NS_ENSURE_SUCCESS(rv, rv);
1.5524 +
1.5525 + int32_t port = -1;
1.5526 + uri->GetPort(&port);
1.5527 + if (port != -1 && port == NS_GetDefaultPort(scheme.get()))
1.5528 + port = -1;
1.5529 +
1.5530 + nsCString hostPort;
1.5531 + rv = NS_GenerateHostPort(host, port, hostPort);
1.5532 + NS_ENSURE_SUCCESS(rv, rv);
1.5533 +
1.5534 + aOrigin = NS_ConvertUTF8toUTF16(
1.5535 + scheme + NS_LITERAL_CSTRING("://") + hostPort);
1.5536 + }
1.5537 + else {
1.5538 + aOrigin.AssignLiteral("null");
1.5539 + }
1.5540 +
1.5541 + return NS_OK;
1.5542 +}
1.5543 +
1.5544 +/* static */
1.5545 +void
1.5546 +nsContentUtils::GetUTFNonNullOrigin(nsIURI* aURI, nsString& aOrigin)
1.5547 +{
1.5548 + aOrigin.Truncate();
1.5549 +
1.5550 + nsString origin;
1.5551 + nsresult rv = GetUTFOrigin(aURI, origin);
1.5552 + if (NS_SUCCEEDED(rv) && !origin.EqualsLiteral("null")) {
1.5553 + aOrigin.Assign(origin);
1.5554 + }
1.5555 +}
1.5556 +
1.5557 +/* static */
1.5558 +nsIDocument*
1.5559 +nsContentUtils::GetDocumentFromScriptContext(nsIScriptContext *aScriptContext)
1.5560 +{
1.5561 + if (!aScriptContext) {
1.5562 + return nullptr;
1.5563 + }
1.5564 +
1.5565 + nsCOMPtr<nsPIDOMWindow> window =
1.5566 + do_QueryInterface(aScriptContext->GetGlobalObject());
1.5567 + if (!window) {
1.5568 + return nullptr;
1.5569 + }
1.5570 +
1.5571 + return window->GetDoc();
1.5572 +}
1.5573 +
1.5574 +/* static */
1.5575 +bool
1.5576 +nsContentUtils::CheckMayLoad(nsIPrincipal* aPrincipal, nsIChannel* aChannel, bool aAllowIfInheritsPrincipal)
1.5577 +{
1.5578 + nsCOMPtr<nsIURI> channelURI;
1.5579 + nsresult rv = NS_GetFinalChannelURI(aChannel, getter_AddRefs(channelURI));
1.5580 + NS_ENSURE_SUCCESS(rv, false);
1.5581 +
1.5582 + return NS_SUCCEEDED(aPrincipal->CheckMayLoad(channelURI, false, aAllowIfInheritsPrincipal));
1.5583 +}
1.5584 +
1.5585 +nsContentTypeParser::nsContentTypeParser(const nsAString& aString)
1.5586 + : mString(aString), mService(nullptr)
1.5587 +{
1.5588 + CallGetService("@mozilla.org/network/mime-hdrparam;1", &mService);
1.5589 +}
1.5590 +
1.5591 +nsContentTypeParser::~nsContentTypeParser()
1.5592 +{
1.5593 + NS_IF_RELEASE(mService);
1.5594 +}
1.5595 +
1.5596 +nsresult
1.5597 +nsContentTypeParser::GetParameter(const char* aParameterName, nsAString& aResult)
1.5598 +{
1.5599 + NS_ENSURE_TRUE(mService, NS_ERROR_FAILURE);
1.5600 + return mService->GetParameterHTTP(mString, aParameterName,
1.5601 + EmptyCString(), false, nullptr,
1.5602 + aResult);
1.5603 +}
1.5604 +
1.5605 +/* static */
1.5606 +
1.5607 +bool
1.5608 +nsContentUtils::CanAccessNativeAnon()
1.5609 +{
1.5610 + return IsCallerChrome() || IsCallerXBL();
1.5611 +}
1.5612 +
1.5613 +/* static */ nsresult
1.5614 +nsContentUtils::DispatchXULCommand(nsIContent* aTarget,
1.5615 + bool aTrusted,
1.5616 + nsIDOMEvent* aSourceEvent,
1.5617 + nsIPresShell* aShell,
1.5618 + bool aCtrl,
1.5619 + bool aAlt,
1.5620 + bool aShift,
1.5621 + bool aMeta)
1.5622 +{
1.5623 + NS_ENSURE_STATE(aTarget);
1.5624 + nsIDocument* doc = aTarget->OwnerDoc();
1.5625 + nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(doc);
1.5626 + NS_ENSURE_STATE(domDoc);
1.5627 + nsCOMPtr<nsIDOMEvent> event;
1.5628 + domDoc->CreateEvent(NS_LITERAL_STRING("xulcommandevent"),
1.5629 + getter_AddRefs(event));
1.5630 + nsCOMPtr<nsIDOMXULCommandEvent> xulCommand = do_QueryInterface(event);
1.5631 + nsresult rv = xulCommand->InitCommandEvent(NS_LITERAL_STRING("command"),
1.5632 + true, true, doc->GetWindow(),
1.5633 + 0, aCtrl, aAlt, aShift, aMeta,
1.5634 + aSourceEvent);
1.5635 + NS_ENSURE_SUCCESS(rv, rv);
1.5636 +
1.5637 + if (aShell) {
1.5638 + nsEventStatus status = nsEventStatus_eIgnore;
1.5639 + nsCOMPtr<nsIPresShell> kungFuDeathGrip = aShell;
1.5640 + return aShell->HandleDOMEventWithTarget(aTarget, event, &status);
1.5641 + }
1.5642 +
1.5643 + nsCOMPtr<EventTarget> target = do_QueryInterface(aTarget);
1.5644 + NS_ENSURE_STATE(target);
1.5645 + bool dummy;
1.5646 + return target->DispatchEvent(event, &dummy);
1.5647 +}
1.5648 +
1.5649 +// static
1.5650 +nsresult
1.5651 +nsContentUtils::WrapNative(JSContext *cx, nsISupports *native,
1.5652 + nsWrapperCache *cache, const nsIID* aIID,
1.5653 + JS::MutableHandle<JS::Value> vp, bool aAllowWrapping)
1.5654 +{
1.5655 + if (!native) {
1.5656 + vp.setNull();
1.5657 +
1.5658 + return NS_OK;
1.5659 + }
1.5660 +
1.5661 + JSObject *wrapper = xpc_FastGetCachedWrapper(cx, cache, vp);
1.5662 + if (wrapper) {
1.5663 + return NS_OK;
1.5664 + }
1.5665 +
1.5666 + NS_ENSURE_TRUE(sXPConnect, NS_ERROR_UNEXPECTED);
1.5667 +
1.5668 + if (!NS_IsMainThread()) {
1.5669 + MOZ_CRASH();
1.5670 + }
1.5671 +
1.5672 + nsresult rv = NS_OK;
1.5673 + JS::Rooted<JSObject*> scope(cx, JS::CurrentGlobalOrNull(cx));
1.5674 + AutoPushJSContext context(cx);
1.5675 + rv = sXPConnect->WrapNativeToJSVal(context, scope, native, cache, aIID,
1.5676 + aAllowWrapping, vp);
1.5677 + return rv;
1.5678 +}
1.5679 +
1.5680 +nsresult
1.5681 +nsContentUtils::CreateArrayBuffer(JSContext *aCx, const nsACString& aData,
1.5682 + JSObject** aResult)
1.5683 +{
1.5684 + if (!aCx) {
1.5685 + return NS_ERROR_FAILURE;
1.5686 + }
1.5687 +
1.5688 + int32_t dataLen = aData.Length();
1.5689 + *aResult = JS_NewArrayBuffer(aCx, dataLen);
1.5690 + if (!*aResult) {
1.5691 + return NS_ERROR_FAILURE;
1.5692 + }
1.5693 +
1.5694 + if (dataLen > 0) {
1.5695 + NS_ASSERTION(JS_IsArrayBufferObject(*aResult), "What happened?");
1.5696 + memcpy(JS_GetArrayBufferData(*aResult), aData.BeginReading(), dataLen);
1.5697 + }
1.5698 +
1.5699 + return NS_OK;
1.5700 +}
1.5701 +
1.5702 +// Initial implementation: only stores to RAM, not file
1.5703 +// TODO: bug 704447: large file support
1.5704 +nsresult
1.5705 +nsContentUtils::CreateBlobBuffer(JSContext* aCx,
1.5706 + const nsACString& aData,
1.5707 + JS::MutableHandle<JS::Value> aBlob)
1.5708 +{
1.5709 + uint32_t blobLen = aData.Length();
1.5710 + void* blobData = moz_malloc(blobLen);
1.5711 + nsCOMPtr<nsIDOMBlob> blob;
1.5712 + if (blobData) {
1.5713 + memcpy(blobData, aData.BeginReading(), blobLen);
1.5714 + blob = new nsDOMMemoryFile(blobData, blobLen, EmptyString());
1.5715 + } else {
1.5716 + return NS_ERROR_OUT_OF_MEMORY;
1.5717 + }
1.5718 + return nsContentUtils::WrapNative(aCx, blob, aBlob);
1.5719 +}
1.5720 +
1.5721 +void
1.5722 +nsContentUtils::StripNullChars(const nsAString& aInStr, nsAString& aOutStr)
1.5723 +{
1.5724 + // In common cases where we don't have nulls in the
1.5725 + // string we can simple simply bypass the checking code.
1.5726 + int32_t firstNullPos = aInStr.FindChar('\0');
1.5727 + if (firstNullPos == kNotFound) {
1.5728 + aOutStr.Assign(aInStr);
1.5729 + return;
1.5730 + }
1.5731 +
1.5732 + aOutStr.SetCapacity(aInStr.Length() - 1);
1.5733 + nsAString::const_iterator start, end;
1.5734 + aInStr.BeginReading(start);
1.5735 + aInStr.EndReading(end);
1.5736 + while (start != end) {
1.5737 + if (*start != '\0')
1.5738 + aOutStr.Append(*start);
1.5739 + ++start;
1.5740 + }
1.5741 +}
1.5742 +
1.5743 +struct ClassMatchingInfo {
1.5744 + nsAttrValue::AtomArray mClasses;
1.5745 + nsCaseTreatment mCaseTreatment;
1.5746 +};
1.5747 +
1.5748 +// static
1.5749 +bool
1.5750 +nsContentUtils::MatchClassNames(nsIContent* aContent, int32_t aNamespaceID,
1.5751 + nsIAtom* aAtom, void* aData)
1.5752 +{
1.5753 + // We can't match if there are no class names
1.5754 + const nsAttrValue* classAttr = aContent->GetClasses();
1.5755 + if (!classAttr) {
1.5756 + return false;
1.5757 + }
1.5758 +
1.5759 + // need to match *all* of the classes
1.5760 + ClassMatchingInfo* info = static_cast<ClassMatchingInfo*>(aData);
1.5761 + uint32_t length = info->mClasses.Length();
1.5762 + if (!length) {
1.5763 + // If we actually had no classes, don't match.
1.5764 + return false;
1.5765 + }
1.5766 + uint32_t i;
1.5767 + for (i = 0; i < length; ++i) {
1.5768 + if (!classAttr->Contains(info->mClasses[i],
1.5769 + info->mCaseTreatment)) {
1.5770 + return false;
1.5771 + }
1.5772 + }
1.5773 +
1.5774 + return true;
1.5775 +}
1.5776 +
1.5777 +// static
1.5778 +void
1.5779 +nsContentUtils::DestroyClassNameArray(void* aData)
1.5780 +{
1.5781 + ClassMatchingInfo* info = static_cast<ClassMatchingInfo*>(aData);
1.5782 + delete info;
1.5783 +}
1.5784 +
1.5785 +// static
1.5786 +void*
1.5787 +nsContentUtils::AllocClassMatchingInfo(nsINode* aRootNode,
1.5788 + const nsString* aClasses)
1.5789 +{
1.5790 + nsAttrValue attrValue;
1.5791 + attrValue.ParseAtomArray(*aClasses);
1.5792 + // nsAttrValue::Equals is sensitive to order, so we'll send an array
1.5793 + ClassMatchingInfo* info = new ClassMatchingInfo;
1.5794 + if (attrValue.Type() == nsAttrValue::eAtomArray) {
1.5795 + info->mClasses.SwapElements(*(attrValue.GetAtomArrayValue()));
1.5796 + } else if (attrValue.Type() == nsAttrValue::eAtom) {
1.5797 + info->mClasses.AppendElement(attrValue.GetAtomValue());
1.5798 + }
1.5799 +
1.5800 + info->mCaseTreatment =
1.5801 + aRootNode->OwnerDoc()->GetCompatibilityMode() == eCompatibility_NavQuirks ?
1.5802 + eIgnoreCase : eCaseMatters;
1.5803 + return info;
1.5804 +}
1.5805 +
1.5806 +// static
1.5807 +void
1.5808 +nsContentUtils::DeferredFinalize(nsISupports* aSupports)
1.5809 +{
1.5810 + cyclecollector::DeferredFinalize(aSupports);
1.5811 +}
1.5812 +
1.5813 +// static
1.5814 +void
1.5815 +nsContentUtils::DeferredFinalize(mozilla::DeferredFinalizeAppendFunction aAppendFunc,
1.5816 + mozilla::DeferredFinalizeFunction aFunc,
1.5817 + void* aThing)
1.5818 +{
1.5819 + cyclecollector::DeferredFinalize(aAppendFunc, aFunc, aThing);
1.5820 +}
1.5821 +
1.5822 +// static
1.5823 +bool
1.5824 +nsContentUtils::IsFocusedContent(const nsIContent* aContent)
1.5825 +{
1.5826 + nsFocusManager* fm = nsFocusManager::GetFocusManager();
1.5827 +
1.5828 + return fm && fm->GetFocusedContent() == aContent;
1.5829 +}
1.5830 +
1.5831 +bool
1.5832 +nsContentUtils::IsSubDocumentTabbable(nsIContent* aContent)
1.5833 +{
1.5834 + nsIDocument* doc = aContent->GetCurrentDoc();
1.5835 + if (!doc) {
1.5836 + return false;
1.5837 + }
1.5838 +
1.5839 + // If the subdocument lives in another process, the frame is
1.5840 + // tabbable.
1.5841 + if (EventStateManager::IsRemoteTarget(aContent)) {
1.5842 + return true;
1.5843 + }
1.5844 +
1.5845 + // XXXbz should this use OwnerDoc() for GetSubDocumentFor?
1.5846 + // sXBL/XBL2 issue!
1.5847 + nsIDocument* subDoc = doc->GetSubDocumentFor(aContent);
1.5848 + if (!subDoc) {
1.5849 + return false;
1.5850 + }
1.5851 +
1.5852 + nsCOMPtr<nsIDocShell> docShell = subDoc->GetDocShell();
1.5853 + if (!docShell) {
1.5854 + return false;
1.5855 + }
1.5856 +
1.5857 + nsCOMPtr<nsIContentViewer> contentViewer;
1.5858 + docShell->GetContentViewer(getter_AddRefs(contentViewer));
1.5859 + if (!contentViewer) {
1.5860 + return false;
1.5861 + }
1.5862 +
1.5863 + nsCOMPtr<nsIContentViewer> zombieViewer;
1.5864 + contentViewer->GetPreviousViewer(getter_AddRefs(zombieViewer));
1.5865 +
1.5866 + // If there are 2 viewers for the current docshell, that
1.5867 + // means the current document is a zombie document.
1.5868 + // Only navigate into the subdocument if it's not a zombie.
1.5869 + return !zombieViewer;
1.5870 +}
1.5871 +
1.5872 +bool
1.5873 +nsContentUtils::IsUserFocusIgnored(nsINode* aNode)
1.5874 +{
1.5875 + if (!nsGenericHTMLFrameElement::BrowserFramesEnabled()) {
1.5876 + return false;
1.5877 + }
1.5878 +
1.5879 + // Check if our mozbrowser iframe ancestors has ignoreuserfocus attribute.
1.5880 + while (aNode) {
1.5881 + nsCOMPtr<nsIMozBrowserFrame> browserFrame = do_QueryInterface(aNode);
1.5882 + if (browserFrame &&
1.5883 + aNode->AsElement()->HasAttr(kNameSpaceID_None, nsGkAtoms::ignoreuserfocus) &&
1.5884 + browserFrame->GetReallyIsBrowserOrApp()) {
1.5885 + return true;
1.5886 + }
1.5887 + nsPIDOMWindow* win = aNode->OwnerDoc()->GetWindow();
1.5888 + aNode = win ? win->GetFrameElementInternal() : nullptr;
1.5889 + }
1.5890 +
1.5891 + return false;
1.5892 +}
1.5893 +
1.5894 +bool
1.5895 +nsContentUtils::HasScrollgrab(nsIContent* aContent)
1.5896 +{
1.5897 + nsGenericHTMLElement* element = nsGenericHTMLElement::FromContentOrNull(aContent);
1.5898 + return element && element->Scrollgrab();
1.5899 +}
1.5900 +
1.5901 +void
1.5902 +nsContentUtils::FlushLayoutForTree(nsIDOMWindow* aWindow)
1.5903 +{
1.5904 + nsCOMPtr<nsPIDOMWindow> piWin = do_QueryInterface(aWindow);
1.5905 + if (!piWin)
1.5906 + return;
1.5907 +
1.5908 + // Note that because FlushPendingNotifications flushes parents, this
1.5909 + // is O(N^2) in docshell tree depth. However, the docshell tree is
1.5910 + // usually pretty shallow.
1.5911 +
1.5912 + nsCOMPtr<nsIDOMDocument> domDoc;
1.5913 + aWindow->GetDocument(getter_AddRefs(domDoc));
1.5914 + nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
1.5915 + if (doc) {
1.5916 + doc->FlushPendingNotifications(Flush_Layout);
1.5917 + }
1.5918 +
1.5919 + nsCOMPtr<nsIDocShell> docShell = piWin->GetDocShell();
1.5920 + if (docShell) {
1.5921 + int32_t i = 0, i_end;
1.5922 + docShell->GetChildCount(&i_end);
1.5923 + for (; i < i_end; ++i) {
1.5924 + nsCOMPtr<nsIDocShellTreeItem> item;
1.5925 + docShell->GetChildAt(i, getter_AddRefs(item));
1.5926 + nsCOMPtr<nsIDOMWindow> win = do_GetInterface(item);
1.5927 + if (win) {
1.5928 + FlushLayoutForTree(win);
1.5929 + }
1.5930 + }
1.5931 + }
1.5932 +}
1.5933 +
1.5934 +void nsContentUtils::RemoveNewlines(nsString &aString)
1.5935 +{
1.5936 + // strip CR/LF and null
1.5937 + static const char badChars[] = {'\r', '\n', 0};
1.5938 + aString.StripChars(badChars);
1.5939 +}
1.5940 +
1.5941 +void
1.5942 +nsContentUtils::PlatformToDOMLineBreaks(nsString &aString)
1.5943 +{
1.5944 + if (aString.FindChar(char16_t('\r')) != -1) {
1.5945 + // Windows linebreaks: Map CRLF to LF:
1.5946 + aString.ReplaceSubstring(MOZ_UTF16("\r\n"),
1.5947 + MOZ_UTF16("\n"));
1.5948 +
1.5949 + // Mac linebreaks: Map any remaining CR to LF:
1.5950 + aString.ReplaceSubstring(MOZ_UTF16("\r"),
1.5951 + MOZ_UTF16("\n"));
1.5952 + }
1.5953 +}
1.5954 +
1.5955 +void
1.5956 +nsContentUtils::PopulateStringFromStringBuffer(nsStringBuffer* aBuf,
1.5957 + nsAString& aResultString)
1.5958 +{
1.5959 + MOZ_ASSERT(aBuf, "Expecting a non-null string buffer");
1.5960 +
1.5961 + uint32_t stringLen = NS_strlen(static_cast<char16_t*>(aBuf->Data()));
1.5962 +
1.5963 + // SANITY CHECK: In case the nsStringBuffer isn't correctly
1.5964 + // null-terminated, let's clamp its length using the allocated size, to be
1.5965 + // sure the resulting string doesn't sample past the end of the the buffer.
1.5966 + // (Note that StorageSize() is in units of bytes, so we have to convert that
1.5967 + // to units of PRUnichars, and subtract 1 for the null-terminator.)
1.5968 + uint32_t allocStringLen = (aBuf->StorageSize() / sizeof(char16_t)) - 1;
1.5969 + MOZ_ASSERT(stringLen <= allocStringLen,
1.5970 + "string buffer lacks null terminator!");
1.5971 + stringLen = std::min(stringLen, allocStringLen);
1.5972 +
1.5973 + aBuf->ToString(stringLen, aResultString);
1.5974 +}
1.5975 +
1.5976 +nsIPresShell*
1.5977 +nsContentUtils::FindPresShellForDocument(const nsIDocument* aDoc)
1.5978 +{
1.5979 + const nsIDocument* doc = aDoc;
1.5980 + nsIDocument* displayDoc = doc->GetDisplayDocument();
1.5981 + if (displayDoc) {
1.5982 + doc = displayDoc;
1.5983 + }
1.5984 +
1.5985 + nsIPresShell* shell = doc->GetShell();
1.5986 + if (shell) {
1.5987 + return shell;
1.5988 + }
1.5989 +
1.5990 + nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem = doc->GetDocShell();
1.5991 + while (docShellTreeItem) {
1.5992 + // We may be in a display:none subdocument, or we may not have a presshell
1.5993 + // created yet.
1.5994 + // Walk the docshell tree to find the nearest container that has a presshell,
1.5995 + // and return that.
1.5996 + nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(docShellTreeItem);
1.5997 + nsIPresShell* presShell = docShell->GetPresShell();
1.5998 + if (presShell) {
1.5999 + return presShell;
1.6000 + }
1.6001 + nsCOMPtr<nsIDocShellTreeItem> parent;
1.6002 + docShellTreeItem->GetParent(getter_AddRefs(parent));
1.6003 + docShellTreeItem = parent;
1.6004 + }
1.6005 +
1.6006 + return nullptr;
1.6007 +}
1.6008 +
1.6009 +nsIWidget*
1.6010 +nsContentUtils::WidgetForDocument(const nsIDocument* aDoc)
1.6011 +{
1.6012 + nsIPresShell* shell = FindPresShellForDocument(aDoc);
1.6013 + if (shell) {
1.6014 + nsViewManager* VM = shell->GetViewManager();
1.6015 + if (VM) {
1.6016 + nsView* rootView = VM->GetRootView();
1.6017 + if (rootView) {
1.6018 + nsView* displayRoot = nsViewManager::GetDisplayRootFor(rootView);
1.6019 + if (displayRoot) {
1.6020 + return displayRoot->GetNearestWidget(nullptr);
1.6021 + }
1.6022 + }
1.6023 + }
1.6024 + }
1.6025 +
1.6026 + return nullptr;
1.6027 +}
1.6028 +
1.6029 +static already_AddRefed<LayerManager>
1.6030 +LayerManagerForDocumentInternal(const nsIDocument *aDoc, bool aRequirePersistent,
1.6031 + bool* aAllowRetaining)
1.6032 +{
1.6033 + nsIWidget *widget = nsContentUtils::WidgetForDocument(aDoc);
1.6034 + if (widget) {
1.6035 + nsRefPtr<LayerManager> manager =
1.6036 + widget->GetLayerManager(aRequirePersistent ? nsIWidget::LAYER_MANAGER_PERSISTENT :
1.6037 + nsIWidget::LAYER_MANAGER_CURRENT,
1.6038 + aAllowRetaining);
1.6039 + return manager.forget();
1.6040 + }
1.6041 +
1.6042 + return nullptr;
1.6043 +}
1.6044 +
1.6045 +already_AddRefed<LayerManager>
1.6046 +nsContentUtils::LayerManagerForDocument(const nsIDocument *aDoc, bool *aAllowRetaining)
1.6047 +{
1.6048 + return LayerManagerForDocumentInternal(aDoc, false, aAllowRetaining);
1.6049 +}
1.6050 +
1.6051 +already_AddRefed<LayerManager>
1.6052 +nsContentUtils::PersistentLayerManagerForDocument(nsIDocument *aDoc, bool *aAllowRetaining)
1.6053 +{
1.6054 + return LayerManagerForDocumentInternal(aDoc, true, aAllowRetaining);
1.6055 +}
1.6056 +
1.6057 +bool
1.6058 +nsContentUtils::AllowXULXBLForPrincipal(nsIPrincipal* aPrincipal)
1.6059 +{
1.6060 + if (IsSystemPrincipal(aPrincipal)) {
1.6061 + return true;
1.6062 + }
1.6063 +
1.6064 + nsCOMPtr<nsIURI> princURI;
1.6065 + aPrincipal->GetURI(getter_AddRefs(princURI));
1.6066 +
1.6067 + return princURI &&
1.6068 + ((sAllowXULXBL_for_file && SchemeIs(princURI, "file")) ||
1.6069 + IsSitePermAllow(aPrincipal, "allowXULXBL"));
1.6070 +}
1.6071 +
1.6072 +already_AddRefed<nsIDocumentLoaderFactory>
1.6073 +nsContentUtils::FindInternalContentViewer(const char* aType,
1.6074 + ContentViewerType* aLoaderType)
1.6075 +{
1.6076 + if (aLoaderType) {
1.6077 + *aLoaderType = TYPE_UNSUPPORTED;
1.6078 + }
1.6079 +
1.6080 + // one helper factory, please
1.6081 + nsCOMPtr<nsICategoryManager> catMan(do_GetService(NS_CATEGORYMANAGER_CONTRACTID));
1.6082 + if (!catMan)
1.6083 + return nullptr;
1.6084 +
1.6085 + nsCOMPtr<nsIDocumentLoaderFactory> docFactory;
1.6086 +
1.6087 + nsXPIDLCString contractID;
1.6088 + nsresult rv = catMan->GetCategoryEntry("Gecko-Content-Viewers", aType, getter_Copies(contractID));
1.6089 + if (NS_SUCCEEDED(rv)) {
1.6090 + docFactory = do_GetService(contractID);
1.6091 + if (docFactory && aLoaderType) {
1.6092 + if (contractID.EqualsLiteral(CONTENT_DLF_CONTRACTID))
1.6093 + *aLoaderType = TYPE_CONTENT;
1.6094 + else if (contractID.EqualsLiteral(PLUGIN_DLF_CONTRACTID))
1.6095 + *aLoaderType = TYPE_PLUGIN;
1.6096 + else
1.6097 + *aLoaderType = TYPE_UNKNOWN;
1.6098 + }
1.6099 + return docFactory.forget();
1.6100 + }
1.6101 +
1.6102 + if (DecoderTraits::IsSupportedInVideoDocument(nsDependentCString(aType))) {
1.6103 + docFactory = do_GetService("@mozilla.org/content/document-loader-factory;1");
1.6104 + if (docFactory && aLoaderType) {
1.6105 + *aLoaderType = TYPE_CONTENT;
1.6106 + }
1.6107 + return docFactory.forget();
1.6108 + }
1.6109 +
1.6110 + return nullptr;
1.6111 +}
1.6112 +
1.6113 +bool
1.6114 +nsContentUtils::GetContentSecurityPolicy(JSContext* aCx,
1.6115 + nsIContentSecurityPolicy** aCSP)
1.6116 +{
1.6117 + NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
1.6118 +
1.6119 + // Get the security manager
1.6120 + nsCOMPtr<nsIScriptSecurityManager> ssm = nsContentUtils::GetSecurityManager();
1.6121 +
1.6122 + if (!ssm) {
1.6123 + NS_ERROR("Failed to get security manager service");
1.6124 + return false;
1.6125 + }
1.6126 +
1.6127 + nsCOMPtr<nsIPrincipal> subjectPrincipal = ssm->GetCxSubjectPrincipal(aCx);
1.6128 + NS_ASSERTION(subjectPrincipal, "Failed to get subjectPrincipal");
1.6129 +
1.6130 + nsCOMPtr<nsIContentSecurityPolicy> csp;
1.6131 + nsresult rv = subjectPrincipal->GetCsp(getter_AddRefs(csp));
1.6132 + if (NS_FAILED(rv)) {
1.6133 + NS_ERROR("CSP: Failed to get CSP from principal.");
1.6134 + return false;
1.6135 + }
1.6136 +
1.6137 + csp.forget(aCSP);
1.6138 + return true;
1.6139 +}
1.6140 +
1.6141 +// static
1.6142 +bool
1.6143 +nsContentUtils::IsPatternMatching(nsAString& aValue, nsAString& aPattern,
1.6144 + nsIDocument* aDocument)
1.6145 +{
1.6146 + NS_ASSERTION(aDocument, "aDocument should be a valid pointer (not null)");
1.6147 + nsCOMPtr<nsIScriptGlobalObject> sgo = do_QueryInterface(aDocument->GetWindow());
1.6148 + NS_ENSURE_TRUE(sgo, true);
1.6149 +
1.6150 + AutoPushJSContext cx(sgo->GetContext()->GetNativeContext());
1.6151 + NS_ENSURE_TRUE(cx, true);
1.6152 +
1.6153 + // The pattern has to match the entire value.
1.6154 + aPattern.Insert(NS_LITERAL_STRING("^(?:"), 0);
1.6155 + aPattern.Append(NS_LITERAL_STRING(")$"));
1.6156 +
1.6157 + JS::Rooted<JSObject*> re(cx,
1.6158 + JS_NewUCRegExpObjectNoStatics(cx,
1.6159 + static_cast<jschar*>(aPattern.BeginWriting()),
1.6160 + aPattern.Length(), 0));
1.6161 + if (!re) {
1.6162 + JS_ClearPendingException(cx);
1.6163 + return true;
1.6164 + }
1.6165 +
1.6166 + JS::Rooted<JS::Value> rval(cx, JS::NullValue());
1.6167 + size_t idx = 0;
1.6168 + if (!JS_ExecuteRegExpNoStatics(cx, re,
1.6169 + static_cast<jschar*>(aValue.BeginWriting()),
1.6170 + aValue.Length(), &idx, true, &rval)) {
1.6171 + JS_ClearPendingException(cx);
1.6172 + return true;
1.6173 + }
1.6174 +
1.6175 + return !rval.isNull();
1.6176 +}
1.6177 +
1.6178 +// static
1.6179 +nsresult
1.6180 +nsContentUtils::URIInheritsSecurityContext(nsIURI *aURI, bool *aResult)
1.6181 +{
1.6182 + // Note: about:blank URIs do NOT inherit the security context from the
1.6183 + // current document, which is what this function tests for...
1.6184 + return NS_URIChainHasFlags(aURI,
1.6185 + nsIProtocolHandler::URI_INHERITS_SECURITY_CONTEXT,
1.6186 + aResult);
1.6187 +}
1.6188 +
1.6189 +// static
1.6190 +bool
1.6191 +nsContentUtils::SetUpChannelOwner(nsIPrincipal* aLoadingPrincipal,
1.6192 + nsIChannel* aChannel,
1.6193 + nsIURI* aURI,
1.6194 + bool aSetUpForAboutBlank,
1.6195 + bool aForceOwner)
1.6196 +{
1.6197 + //
1.6198 + // Set the owner of the channel, but only for channels that can't
1.6199 + // provide their own security context.
1.6200 + //
1.6201 + // XXX: It seems wrong that the owner is ignored - even if one is
1.6202 + // supplied) unless the URI is javascript or data or about:blank.
1.6203 + // XXX: If this is ever changed, check all callers for what owners
1.6204 + // they're passing in. In particular, see the code and
1.6205 + // comments in nsDocShell::LoadURI where we fall back on
1.6206 + // inheriting the owner if called from chrome. That would be
1.6207 + // very wrong if this code changed anything but channels that
1.6208 + // can't provide their own security context!
1.6209 + //
1.6210 + // (Currently chrome URIs set the owner when they are created!
1.6211 + // So setting a nullptr owner would be bad!)
1.6212 + //
1.6213 + // If aForceOwner is true, the owner will be set, even for a channel that
1.6214 + // can provide its own security context. This is used for the HTML5 IFRAME
1.6215 + // sandbox attribute, so we can force the channel (and its document) to
1.6216 + // explicitly have a null principal.
1.6217 + bool inherit;
1.6218 + // We expect URIInheritsSecurityContext to return success for an
1.6219 + // about:blank URI, so don't call NS_IsAboutBlank() if this call fails.
1.6220 + // This condition needs to match the one in nsDocShell::InternalLoad where
1.6221 + // we're checking for things that will use the owner.
1.6222 + if (aForceOwner || ((NS_SUCCEEDED(URIInheritsSecurityContext(aURI, &inherit)) &&
1.6223 + (inherit || (aSetUpForAboutBlank && NS_IsAboutBlank(aURI)))))) {
1.6224 +#ifdef DEBUG
1.6225 + // Assert that aForceOwner is only set for null principals for non-srcdoc
1.6226 + // loads. (Strictly speaking not all uses of about:srcdoc would be
1.6227 + // srcdoc loads, but the URI is non-resolvable in cases where it is not).
1.6228 + if (aForceOwner) {
1.6229 + nsAutoCString uriStr;
1.6230 + aURI->GetSpec(uriStr);
1.6231 + if(!uriStr.EqualsLiteral("about:srcdoc") &&
1.6232 + !uriStr.EqualsLiteral("view-source:about:srcdoc")) {
1.6233 + nsCOMPtr<nsIURI> ownerURI;
1.6234 + nsresult rv = aLoadingPrincipal->GetURI(getter_AddRefs(ownerURI));
1.6235 + MOZ_ASSERT(NS_SUCCEEDED(rv) && SchemeIs(ownerURI, NS_NULLPRINCIPAL_SCHEME));
1.6236 + }
1.6237 + }
1.6238 +#endif
1.6239 + aChannel->SetOwner(aLoadingPrincipal);
1.6240 + return true;
1.6241 + }
1.6242 +
1.6243 + //
1.6244 + // file: uri special-casing
1.6245 + //
1.6246 + // If this is a file: load opened from another file: then it may need
1.6247 + // to inherit the owner from the referrer so they can script each other.
1.6248 + // If we don't set the owner explicitly then each file: gets an owner
1.6249 + // based on its own codebase later.
1.6250 + //
1.6251 + if (URIIsLocalFile(aURI) && aLoadingPrincipal &&
1.6252 + NS_SUCCEEDED(aLoadingPrincipal->CheckMayLoad(aURI, false, false)) &&
1.6253 + // One more check here. CheckMayLoad will always return true for the
1.6254 + // system principal, but we do NOT want to inherit in that case.
1.6255 + !IsSystemPrincipal(aLoadingPrincipal)) {
1.6256 + aChannel->SetOwner(aLoadingPrincipal);
1.6257 + return true;
1.6258 + }
1.6259 +
1.6260 + return false;
1.6261 +}
1.6262 +
1.6263 +/* static */
1.6264 +bool
1.6265 +nsContentUtils::IsFullScreenApiEnabled()
1.6266 +{
1.6267 + return sIsFullScreenApiEnabled;
1.6268 +}
1.6269 +
1.6270 +/* static */
1.6271 +bool
1.6272 +nsContentUtils::IsRequestFullScreenAllowed()
1.6273 +{
1.6274 + return !sTrustedFullScreenOnly ||
1.6275 + EventStateManager::IsHandlingUserInput() ||
1.6276 + IsCallerChrome();
1.6277 +}
1.6278 +
1.6279 +/* static */
1.6280 +bool
1.6281 +nsContentUtils::IsFullscreenApiContentOnly()
1.6282 +{
1.6283 + return sFullscreenApiIsContentOnly;
1.6284 +}
1.6285 +
1.6286 +/* static */
1.6287 +bool
1.6288 +nsContentUtils::HaveEqualPrincipals(nsIDocument* aDoc1, nsIDocument* aDoc2)
1.6289 +{
1.6290 + if (!aDoc1 || !aDoc2) {
1.6291 + return false;
1.6292 + }
1.6293 + bool principalsEqual = false;
1.6294 + aDoc1->NodePrincipal()->Equals(aDoc2->NodePrincipal(), &principalsEqual);
1.6295 + return principalsEqual;
1.6296 +}
1.6297 +
1.6298 +static void
1.6299 +CheckForWindowedPlugins(nsIContent* aContent, void* aResult)
1.6300 +{
1.6301 + if (!aContent->IsInDoc()) {
1.6302 + return;
1.6303 + }
1.6304 + nsCOMPtr<nsIObjectLoadingContent> olc(do_QueryInterface(aContent));
1.6305 + if (!olc) {
1.6306 + return;
1.6307 + }
1.6308 + nsRefPtr<nsNPAPIPluginInstance> plugin;
1.6309 + olc->GetPluginInstance(getter_AddRefs(plugin));
1.6310 + if (!plugin) {
1.6311 + return;
1.6312 + }
1.6313 + bool isWindowless = false;
1.6314 + nsresult res = plugin->IsWindowless(&isWindowless);
1.6315 + if (NS_SUCCEEDED(res) && !isWindowless) {
1.6316 + *static_cast<bool*>(aResult) = true;
1.6317 + }
1.6318 +}
1.6319 +
1.6320 +static bool
1.6321 +DocTreeContainsWindowedPlugins(nsIDocument* aDoc, void* aResult)
1.6322 +{
1.6323 + if (!nsContentUtils::IsChromeDoc(aDoc)) {
1.6324 + aDoc->EnumerateFreezableElements(CheckForWindowedPlugins, aResult);
1.6325 + }
1.6326 + if (*static_cast<bool*>(aResult)) {
1.6327 + // Return false to stop iteration, we found a windowed plugin.
1.6328 + return false;
1.6329 + }
1.6330 + aDoc->EnumerateSubDocuments(DocTreeContainsWindowedPlugins, aResult);
1.6331 + // Return false to stop iteration if we found a windowed plugin in
1.6332 + // the sub documents.
1.6333 + return !*static_cast<bool*>(aResult);
1.6334 +}
1.6335 +
1.6336 +/* static */
1.6337 +bool
1.6338 +nsContentUtils::HasPluginWithUncontrolledEventDispatch(nsIDocument* aDoc)
1.6339 +{
1.6340 +#ifdef XP_MACOSX
1.6341 + // We control dispatch to all mac plugins.
1.6342 + return false;
1.6343 +#endif
1.6344 + bool result = false;
1.6345 +
1.6346 + // Find the top of the document's branch, the child of the chrome document.
1.6347 + nsIDocument* doc = aDoc;
1.6348 + nsIDocument* parent = nullptr;
1.6349 + while (doc && (parent = doc->GetParentDocument()) && !IsChromeDoc(parent)) {
1.6350 + doc = parent;
1.6351 + }
1.6352 +
1.6353 + DocTreeContainsWindowedPlugins(doc, &result);
1.6354 + return result;
1.6355 +}
1.6356 +
1.6357 +/* static */
1.6358 +bool
1.6359 +nsContentUtils::HasPluginWithUncontrolledEventDispatch(nsIContent* aContent)
1.6360 +{
1.6361 +#ifdef XP_MACOSX
1.6362 + // We control dispatch to all mac plugins.
1.6363 + return false;
1.6364 +#endif
1.6365 + bool result = false;
1.6366 + CheckForWindowedPlugins(aContent, &result);
1.6367 + return result;
1.6368 +}
1.6369 +
1.6370 +/* static */
1.6371 +void
1.6372 +nsContentUtils::FireMutationEventsForDirectParsing(nsIDocument* aDoc,
1.6373 + nsIContent* aDest,
1.6374 + int32_t aOldChildCount)
1.6375 +{
1.6376 + // Fire mutation events. Optimize for the case when there are no listeners
1.6377 + int32_t newChildCount = aDest->GetChildCount();
1.6378 + if (newChildCount && nsContentUtils::
1.6379 + HasMutationListeners(aDoc, NS_EVENT_BITS_MUTATION_NODEINSERTED)) {
1.6380 + nsAutoTArray<nsCOMPtr<nsIContent>, 50> childNodes;
1.6381 + NS_ASSERTION(newChildCount - aOldChildCount >= 0,
1.6382 + "What, some unexpected dom mutation has happened?");
1.6383 + childNodes.SetCapacity(newChildCount - aOldChildCount);
1.6384 + for (nsIContent* child = aDest->GetFirstChild();
1.6385 + child;
1.6386 + child = child->GetNextSibling()) {
1.6387 + childNodes.AppendElement(child);
1.6388 + }
1.6389 + FragmentOrElement::FireNodeInserted(aDoc, aDest, childNodes);
1.6390 + }
1.6391 +}
1.6392 +
1.6393 +/* static */
1.6394 +nsIDocument*
1.6395 +nsContentUtils::GetFullscreenAncestor(nsIDocument* aDoc)
1.6396 +{
1.6397 + nsIDocument* doc = aDoc;
1.6398 + while (doc) {
1.6399 + if (doc->IsFullScreenDoc()) {
1.6400 + return doc;
1.6401 + }
1.6402 + doc = doc->GetParentDocument();
1.6403 + }
1.6404 + return nullptr;
1.6405 +}
1.6406 +
1.6407 +/* static */
1.6408 +bool
1.6409 +nsContentUtils::IsInPointerLockContext(nsIDOMWindow* aWin)
1.6410 +{
1.6411 + if (!aWin) {
1.6412 + return false;
1.6413 + }
1.6414 +
1.6415 + nsCOMPtr<nsIDocument> pointerLockedDoc =
1.6416 + do_QueryReferent(EventStateManager::sPointerLockedDoc);
1.6417 + if (!pointerLockedDoc || !pointerLockedDoc->GetWindow()) {
1.6418 + return false;
1.6419 + }
1.6420 +
1.6421 + nsCOMPtr<nsIDOMWindow> lockTop;
1.6422 + pointerLockedDoc->GetWindow()->GetScriptableTop(getter_AddRefs(lockTop));
1.6423 +
1.6424 + nsCOMPtr<nsIDOMWindow> top;
1.6425 + aWin->GetScriptableTop(getter_AddRefs(top));
1.6426 +
1.6427 + return top == lockTop;
1.6428 +}
1.6429 +
1.6430 +// static
1.6431 +int32_t
1.6432 +nsContentUtils::GetAdjustedOffsetInTextControl(nsIFrame* aOffsetFrame,
1.6433 + int32_t aOffset)
1.6434 +{
1.6435 + // The structure of the anonymous frames within a text control frame is
1.6436 + // an optional block frame, followed by an optional br frame.
1.6437 +
1.6438 + // If the offset frame has a child, then this frame is the block which
1.6439 + // has the text frames (containing the content) as its children. This will
1.6440 + // be the case if we click to the right of any of the text frames, or at the
1.6441 + // bottom of the text area.
1.6442 + nsIFrame* firstChild = aOffsetFrame->GetFirstPrincipalChild();
1.6443 + if (firstChild) {
1.6444 + // In this case, the passed-in offset is incorrect, and we want the length
1.6445 + // of the entire content in the text control frame.
1.6446 + return firstChild->GetContent()->Length();
1.6447 + }
1.6448 +
1.6449 + if (aOffsetFrame->GetPrevSibling() &&
1.6450 + !aOffsetFrame->GetNextSibling()) {
1.6451 + // In this case, we're actually within the last frame, which is a br
1.6452 + // frame. Our offset should therefore be the length of the first child of
1.6453 + // our parent.
1.6454 + int32_t aOutOffset =
1.6455 + aOffsetFrame->GetParent()->GetFirstPrincipalChild()->GetContent()->Length();
1.6456 + return aOutOffset;
1.6457 + }
1.6458 +
1.6459 + // Otherwise, we're within one of the text frames, in which case our offset
1.6460 + // has already been correctly calculated.
1.6461 + return aOffset;
1.6462 +}
1.6463 +
1.6464 +// static
1.6465 +void
1.6466 +nsContentUtils::GetSelectionInTextControl(Selection* aSelection,
1.6467 + Element* aRoot,
1.6468 + int32_t& aOutStartOffset,
1.6469 + int32_t& aOutEndOffset)
1.6470 +{
1.6471 + MOZ_ASSERT(aSelection && aRoot);
1.6472 +
1.6473 + if (!aSelection->GetRangeCount()) {
1.6474 + // Nothing selected
1.6475 + aOutStartOffset = aOutEndOffset = 0;
1.6476 + return;
1.6477 + }
1.6478 +
1.6479 + nsCOMPtr<nsINode> anchorNode = aSelection->GetAnchorNode();
1.6480 + uint32_t anchorOffset = aSelection->AnchorOffset();
1.6481 + nsCOMPtr<nsINode> focusNode = aSelection->GetFocusNode();
1.6482 + uint32_t focusOffset = aSelection->FocusOffset();
1.6483 +
1.6484 + // We have at most two children, consisting of an optional text node followed
1.6485 + // by an optional <br>.
1.6486 + NS_ASSERTION(aRoot->GetChildCount() <= 2, "Unexpected children");
1.6487 + nsCOMPtr<nsIContent> firstChild = aRoot->GetFirstChild();
1.6488 +#ifdef DEBUG
1.6489 + nsCOMPtr<nsIContent> lastChild = aRoot->GetLastChild();
1.6490 + NS_ASSERTION(anchorNode == aRoot || anchorNode == firstChild ||
1.6491 + anchorNode == lastChild, "Unexpected anchorNode");
1.6492 + NS_ASSERTION(focusNode == aRoot || focusNode == firstChild ||
1.6493 + focusNode == lastChild, "Unexpected focusNode");
1.6494 +#endif
1.6495 + if (!firstChild || !firstChild->IsNodeOfType(nsINode::eTEXT)) {
1.6496 + // No text node, so everything is 0
1.6497 + anchorOffset = focusOffset = 0;
1.6498 + } else {
1.6499 + // First child is text. If the anchor/focus is already in the text node,
1.6500 + // or the start of the root node, no change needed. If it's in the root
1.6501 + // node but not the start, or in the trailing <br>, we need to set the
1.6502 + // offset to the end.
1.6503 + if ((anchorNode == aRoot && anchorOffset != 0) ||
1.6504 + (anchorNode != aRoot && anchorNode != firstChild)) {
1.6505 + anchorOffset = firstChild->Length();
1.6506 + }
1.6507 + if ((focusNode == aRoot && focusOffset != 0) ||
1.6508 + (focusNode != aRoot && focusNode != firstChild)) {
1.6509 + focusOffset = firstChild->Length();
1.6510 + }
1.6511 + }
1.6512 +
1.6513 + // Make sure aOutStartOffset <= aOutEndOffset.
1.6514 + aOutStartOffset = std::min(anchorOffset, focusOffset);
1.6515 + aOutEndOffset = std::max(anchorOffset, focusOffset);
1.6516 +}
1.6517 +
1.6518 +nsIEditor*
1.6519 +nsContentUtils::GetHTMLEditor(nsPresContext* aPresContext)
1.6520 +{
1.6521 + nsCOMPtr<nsIDocShell> docShell(aPresContext->GetDocShell());
1.6522 + bool isEditable;
1.6523 + if (!docShell ||
1.6524 + NS_FAILED(docShell->GetEditable(&isEditable)) || !isEditable)
1.6525 + return nullptr;
1.6526 +
1.6527 + nsCOMPtr<nsIEditor> editor;
1.6528 + docShell->GetEditor(getter_AddRefs(editor));
1.6529 + return editor;
1.6530 +}
1.6531 +
1.6532 +bool
1.6533 +nsContentUtils::InternalIsSupported(nsISupports* aObject,
1.6534 + const nsAString& aFeature,
1.6535 + const nsAString& aVersion)
1.6536 +{
1.6537 + // If it looks like an SVG feature string, forward to nsSVGFeatures
1.6538 + if (StringBeginsWith(aFeature,
1.6539 + NS_LITERAL_STRING("http://www.w3.org/TR/SVG"),
1.6540 + nsASCIICaseInsensitiveStringComparator()) ||
1.6541 + StringBeginsWith(aFeature, NS_LITERAL_STRING("org.w3c.dom.svg"),
1.6542 + nsASCIICaseInsensitiveStringComparator()) ||
1.6543 + StringBeginsWith(aFeature, NS_LITERAL_STRING("org.w3c.svg"),
1.6544 + nsASCIICaseInsensitiveStringComparator())) {
1.6545 + return (aVersion.IsEmpty() || aVersion.EqualsLiteral("1.0") ||
1.6546 + aVersion.EqualsLiteral("1.1")) &&
1.6547 + nsSVGFeatures::HasFeature(aObject, aFeature);
1.6548 + }
1.6549 +
1.6550 + // Otherwise, we claim to support everything
1.6551 + return true;
1.6552 +}
1.6553 +
1.6554 +bool
1.6555 +nsContentUtils::IsContentInsertionPoint(const nsIContent* aContent)
1.6556 +{
1.6557 + // Check if the content is a XBL insertion point.
1.6558 + if (aContent->IsActiveChildrenElement()) {
1.6559 + return true;
1.6560 + }
1.6561 +
1.6562 + // Check if the content is a web components content insertion point.
1.6563 + if (aContent->IsHTML(nsGkAtoms::content)) {
1.6564 + return static_cast<const HTMLContentElement*>(aContent)->IsInsertionPoint();
1.6565 + }
1.6566 +
1.6567 + return false;
1.6568 +}
1.6569 +
1.6570 +bool
1.6571 +nsContentUtils::DOMWindowDumpEnabled()
1.6572 +{
1.6573 +#if !(defined(DEBUG) || defined(MOZ_ENABLE_JS_DUMP))
1.6574 + // In optimized builds we check a pref that controls if we should
1.6575 + // enable output from dump() or not, in debug builds it's always
1.6576 + // enabled.
1.6577 + return nsContentUtils::sDOMWindowDumpEnabled;
1.6578 +#else
1.6579 + return true;
1.6580 +#endif
1.6581 +}
1.6582 +
1.6583 +bool
1.6584 +nsContentUtils::GetNodeTextContent(nsINode* aNode, bool aDeep, nsAString& aResult)
1.6585 +{
1.6586 + aResult.Truncate();
1.6587 + return AppendNodeTextContent(aNode, aDeep, aResult, mozilla::fallible_t());
1.6588 +}
1.6589 +
1.6590 +void
1.6591 +nsContentUtils::DestroyMatchString(void* aData)
1.6592 +{
1.6593 + if (aData) {
1.6594 + nsString* matchString = static_cast<nsString*>(aData);
1.6595 + delete matchString;
1.6596 + }
1.6597 +}
1.6598 +
1.6599 +bool
1.6600 +nsContentUtils::IsJavascriptMIMEType(const nsAString& aMIMEType)
1.6601 +{
1.6602 + // Table ordered from most to least likely JS MIME types.
1.6603 + static const char* jsTypes[] = {
1.6604 + "text/javascript",
1.6605 + "text/ecmascript",
1.6606 + "application/javascript",
1.6607 + "application/ecmascript",
1.6608 + "application/x-javascript",
1.6609 + "application/x-ecmascript",
1.6610 + "text/javascript1.0",
1.6611 + "text/javascript1.1",
1.6612 + "text/javascript1.2",
1.6613 + "text/javascript1.3",
1.6614 + "text/javascript1.4",
1.6615 + "text/javascript1.5",
1.6616 + "text/jscript",
1.6617 + "text/livescript",
1.6618 + "text/x-ecmascript",
1.6619 + "text/x-javascript",
1.6620 + nullptr
1.6621 + };
1.6622 +
1.6623 + for (uint32_t i = 0; jsTypes[i]; ++i) {
1.6624 + if (aMIMEType.LowerCaseEqualsASCII(jsTypes[i])) {
1.6625 + return true;
1.6626 + }
1.6627 + }
1.6628 +
1.6629 + return false;
1.6630 +}
