1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/style/nsLayoutStylesheetCache.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,348 @@
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 +#include "nsLayoutStylesheetCache.h"
1.11 +
1.12 +#include "nsAppDirectoryServiceDefs.h"
1.13 +#include "mozilla/MemoryReporting.h"
1.14 +#include "mozilla/Preferences.h"
1.15 +#include "mozilla/css/Loader.h"
1.16 +#include "nsIFile.h"
1.17 +#include "nsNetUtil.h"
1.18 +#include "nsIObserverService.h"
1.19 +#include "nsServiceManagerUtils.h"
1.20 +#include "nsIXULRuntime.h"
1.21 +#include "nsCSSStyleSheet.h"
1.22 +
1.23 +using namespace mozilla;
1.24 +
1.25 +static bool sNumberControlEnabled;
1.26 +
1.27 +#define NUMBER_CONTROL_PREF "dom.forms.number"
1.28 +
1.29 +NS_IMPL_ISUPPORTS(
1.30 + nsLayoutStylesheetCache, nsIObserver, nsIMemoryReporter)
1.31 +
1.32 +nsresult
1.33 +nsLayoutStylesheetCache::Observe(nsISupports* aSubject,
1.34 + const char* aTopic,
1.35 + const char16_t* aData)
1.36 +{
1.37 + if (!strcmp(aTopic, "profile-before-change")) {
1.38 + mUserContentSheet = nullptr;
1.39 + mUserChromeSheet = nullptr;
1.40 + }
1.41 + else if (!strcmp(aTopic, "profile-do-change")) {
1.42 + InitFromProfile();
1.43 + }
1.44 + else if (strcmp(aTopic, "chrome-flush-skin-caches") == 0 ||
1.45 + strcmp(aTopic, "chrome-flush-caches") == 0) {
1.46 + mScrollbarsSheet = nullptr;
1.47 + mFormsSheet = nullptr;
1.48 + mNumberControlSheet = nullptr;
1.49 + }
1.50 + else {
1.51 + NS_NOTREACHED("Unexpected observer topic.");
1.52 + }
1.53 + return NS_OK;
1.54 +}
1.55 +
1.56 +nsCSSStyleSheet*
1.57 +nsLayoutStylesheetCache::ScrollbarsSheet()
1.58 +{
1.59 + EnsureGlobal();
1.60 + if (!gStyleCache)
1.61 + return nullptr;
1.62 +
1.63 + if (!gStyleCache->mScrollbarsSheet) {
1.64 + nsCOMPtr<nsIURI> sheetURI;
1.65 + NS_NewURI(getter_AddRefs(sheetURI),
1.66 + NS_LITERAL_CSTRING("chrome://global/skin/scrollbars.css"));
1.67 +
1.68 + // Scrollbars don't need access to unsafe rules
1.69 + if (sheetURI)
1.70 + LoadSheet(sheetURI, gStyleCache->mScrollbarsSheet, false);
1.71 + NS_ASSERTION(gStyleCache->mScrollbarsSheet, "Could not load scrollbars.css.");
1.72 + }
1.73 +
1.74 + return gStyleCache->mScrollbarsSheet;
1.75 +}
1.76 +
1.77 +nsCSSStyleSheet*
1.78 +nsLayoutStylesheetCache::FormsSheet()
1.79 +{
1.80 + EnsureGlobal();
1.81 + if (!gStyleCache)
1.82 + return nullptr;
1.83 +
1.84 + if (!gStyleCache->mFormsSheet) {
1.85 + nsCOMPtr<nsIURI> sheetURI;
1.86 + NS_NewURI(getter_AddRefs(sheetURI),
1.87 + NS_LITERAL_CSTRING("resource://gre-resources/forms.css"));
1.88 +
1.89 + // forms.css needs access to unsafe rules
1.90 + if (sheetURI)
1.91 + LoadSheet(sheetURI, gStyleCache->mFormsSheet, true);
1.92 +
1.93 + NS_ASSERTION(gStyleCache->mFormsSheet, "Could not load forms.css.");
1.94 + }
1.95 +
1.96 + return gStyleCache->mFormsSheet;
1.97 +}
1.98 +
1.99 +nsCSSStyleSheet*
1.100 +nsLayoutStylesheetCache::NumberControlSheet()
1.101 +{
1.102 + EnsureGlobal();
1.103 + if (!gStyleCache)
1.104 + return nullptr;
1.105 +
1.106 + if (!sNumberControlEnabled) {
1.107 + return nullptr;
1.108 + }
1.109 +
1.110 + if (!gStyleCache->mNumberControlSheet) {
1.111 + nsCOMPtr<nsIURI> sheetURI;
1.112 + NS_NewURI(getter_AddRefs(sheetURI),
1.113 + NS_LITERAL_CSTRING("resource://gre-resources/number-control.css"));
1.114 +
1.115 + if (sheetURI)
1.116 + LoadSheet(sheetURI, gStyleCache->mNumberControlSheet, false);
1.117 +
1.118 + NS_ASSERTION(gStyleCache->mNumberControlSheet, "Could not load number-control.css");
1.119 + }
1.120 +
1.121 + return gStyleCache->mNumberControlSheet;
1.122 +}
1.123 +
1.124 +nsCSSStyleSheet*
1.125 +nsLayoutStylesheetCache::UserContentSheet()
1.126 +{
1.127 + EnsureGlobal();
1.128 + if (!gStyleCache)
1.129 + return nullptr;
1.130 +
1.131 + return gStyleCache->mUserContentSheet;
1.132 +}
1.133 +
1.134 +nsCSSStyleSheet*
1.135 +nsLayoutStylesheetCache::UserChromeSheet()
1.136 +{
1.137 + EnsureGlobal();
1.138 + if (!gStyleCache)
1.139 + return nullptr;
1.140 +
1.141 + return gStyleCache->mUserChromeSheet;
1.142 +}
1.143 +
1.144 +nsCSSStyleSheet*
1.145 +nsLayoutStylesheetCache::UASheet()
1.146 +{
1.147 + EnsureGlobal();
1.148 + if (!gStyleCache)
1.149 + return nullptr;
1.150 +
1.151 + return gStyleCache->mUASheet;
1.152 +}
1.153 +
1.154 +nsCSSStyleSheet*
1.155 +nsLayoutStylesheetCache::QuirkSheet()
1.156 +{
1.157 + EnsureGlobal();
1.158 + if (!gStyleCache)
1.159 + return nullptr;
1.160 +
1.161 + return gStyleCache->mQuirkSheet;
1.162 +}
1.163 +
1.164 +nsCSSStyleSheet*
1.165 +nsLayoutStylesheetCache::FullScreenOverrideSheet()
1.166 +{
1.167 + EnsureGlobal();
1.168 + if (!gStyleCache)
1.169 + return nullptr;
1.170 +
1.171 + return gStyleCache->mFullScreenOverrideSheet;
1.172 +}
1.173 +
1.174 +void
1.175 +nsLayoutStylesheetCache::Shutdown()
1.176 +{
1.177 + NS_IF_RELEASE(gCSSLoader);
1.178 + NS_IF_RELEASE(gStyleCache);
1.179 +}
1.180 +
1.181 +MOZ_DEFINE_MALLOC_SIZE_OF(LayoutStylesheetCacheMallocSizeOf)
1.182 +
1.183 +NS_IMETHODIMP
1.184 +nsLayoutStylesheetCache::CollectReports(nsIHandleReportCallback* aHandleReport,
1.185 + nsISupports* aData)
1.186 +{
1.187 + return MOZ_COLLECT_REPORT(
1.188 + "explicit/layout/style-sheet-cache", KIND_HEAP, UNITS_BYTES,
1.189 + SizeOfIncludingThis(LayoutStylesheetCacheMallocSizeOf),
1.190 + "Memory used for some built-in style sheets.");
1.191 +}
1.192 +
1.193 +
1.194 +size_t
1.195 +nsLayoutStylesheetCache::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
1.196 +{
1.197 + size_t n = aMallocSizeOf(this);
1.198 +
1.199 + #define MEASURE(s) n += s ? s->SizeOfIncludingThis(aMallocSizeOf) : 0;
1.200 +
1.201 + MEASURE(mScrollbarsSheet);
1.202 + MEASURE(mFormsSheet);
1.203 + MEASURE(mNumberControlSheet);
1.204 + MEASURE(mUserContentSheet);
1.205 + MEASURE(mUserChromeSheet);
1.206 + MEASURE(mUASheet);
1.207 + MEASURE(mQuirkSheet);
1.208 + MEASURE(mFullScreenOverrideSheet);
1.209 +
1.210 + // Measurement of the following members may be added later if DMD finds it is
1.211 + // worthwhile:
1.212 + // - gCSSLoader
1.213 +
1.214 + return n;
1.215 +}
1.216 +
1.217 +nsLayoutStylesheetCache::nsLayoutStylesheetCache()
1.218 +{
1.219 + nsCOMPtr<nsIObserverService> obsSvc =
1.220 + mozilla::services::GetObserverService();
1.221 + NS_ASSERTION(obsSvc, "No global observer service?");
1.222 +
1.223 + if (obsSvc) {
1.224 + obsSvc->AddObserver(this, "profile-before-change", false);
1.225 + obsSvc->AddObserver(this, "profile-do-change", false);
1.226 + obsSvc->AddObserver(this, "chrome-flush-skin-caches", false);
1.227 + obsSvc->AddObserver(this, "chrome-flush-caches", false);
1.228 + }
1.229 +
1.230 + InitFromProfile();
1.231 +
1.232 + // And make sure that we load our UA sheets. No need to do this
1.233 + // per-profile, since they're profile-invariant.
1.234 + nsCOMPtr<nsIURI> uri;
1.235 + NS_NewURI(getter_AddRefs(uri), "resource://gre-resources/ua.css");
1.236 + if (uri) {
1.237 + LoadSheet(uri, mUASheet, true);
1.238 + }
1.239 + NS_ASSERTION(mUASheet, "Could not load ua.css");
1.240 +
1.241 + NS_NewURI(getter_AddRefs(uri), "resource://gre-resources/quirk.css");
1.242 + if (uri) {
1.243 + LoadSheet(uri, mQuirkSheet, true);
1.244 + }
1.245 + NS_ASSERTION(mQuirkSheet, "Could not load quirk.css");
1.246 +
1.247 + NS_NewURI(getter_AddRefs(uri), "resource://gre-resources/full-screen-override.css");
1.248 + if (uri) {
1.249 + LoadSheet(uri, mFullScreenOverrideSheet, true);
1.250 + }
1.251 + NS_ASSERTION(mFullScreenOverrideSheet, "Could not load full-screen-override.css");
1.252 +}
1.253 +
1.254 +nsLayoutStylesheetCache::~nsLayoutStylesheetCache()
1.255 +{
1.256 + mozilla::UnregisterWeakMemoryReporter(this);
1.257 + gStyleCache = nullptr;
1.258 +}
1.259 +
1.260 +void
1.261 +nsLayoutStylesheetCache::InitMemoryReporter()
1.262 +{
1.263 + mozilla::RegisterWeakMemoryReporter(this);
1.264 +}
1.265 +
1.266 +void
1.267 +nsLayoutStylesheetCache::EnsureGlobal()
1.268 +{
1.269 + if (gStyleCache) return;
1.270 +
1.271 + gStyleCache = new nsLayoutStylesheetCache();
1.272 + if (!gStyleCache) return;
1.273 +
1.274 + NS_ADDREF(gStyleCache);
1.275 +
1.276 + gStyleCache->InitMemoryReporter();
1.277 +
1.278 + Preferences::AddBoolVarCache(&sNumberControlEnabled, NUMBER_CONTROL_PREF,
1.279 + true);
1.280 +}
1.281 +
1.282 +void
1.283 +nsLayoutStylesheetCache::InitFromProfile()
1.284 +{
1.285 + nsCOMPtr<nsIXULRuntime> appInfo = do_GetService("@mozilla.org/xre/app-info;1");
1.286 + if (appInfo) {
1.287 + bool inSafeMode = false;
1.288 + appInfo->GetInSafeMode(&inSafeMode);
1.289 + if (inSafeMode)
1.290 + return;
1.291 + }
1.292 + nsCOMPtr<nsIFile> contentFile;
1.293 + nsCOMPtr<nsIFile> chromeFile;
1.294 +
1.295 + NS_GetSpecialDirectory(NS_APP_USER_CHROME_DIR,
1.296 + getter_AddRefs(contentFile));
1.297 + if (!contentFile) {
1.298 + // if we don't have a profile yet, that's OK!
1.299 + return;
1.300 + }
1.301 +
1.302 + contentFile->Clone(getter_AddRefs(chromeFile));
1.303 + if (!chromeFile) return;
1.304 +
1.305 + contentFile->Append(NS_LITERAL_STRING("userContent.css"));
1.306 + chromeFile->Append(NS_LITERAL_STRING("userChrome.css"));
1.307 +
1.308 + LoadSheetFile(contentFile, mUserContentSheet);
1.309 + LoadSheetFile(chromeFile, mUserChromeSheet);
1.310 +}
1.311 +
1.312 +void
1.313 +nsLayoutStylesheetCache::LoadSheetFile(nsIFile* aFile, nsRefPtr<nsCSSStyleSheet> &aSheet)
1.314 +{
1.315 + bool exists = false;
1.316 + aFile->Exists(&exists);
1.317 +
1.318 + if (!exists) return;
1.319 +
1.320 + nsCOMPtr<nsIURI> uri;
1.321 + NS_NewFileURI(getter_AddRefs(uri), aFile);
1.322 +
1.323 + LoadSheet(uri, aSheet, false);
1.324 +}
1.325 +
1.326 +void
1.327 +nsLayoutStylesheetCache::LoadSheet(nsIURI* aURI,
1.328 + nsRefPtr<nsCSSStyleSheet> &aSheet,
1.329 + bool aEnableUnsafeRules)
1.330 +{
1.331 + if (!aURI) {
1.332 + NS_ERROR("Null URI. Out of memory?");
1.333 + return;
1.334 + }
1.335 +
1.336 + if (!gCSSLoader) {
1.337 + gCSSLoader = new mozilla::css::Loader();
1.338 + NS_IF_ADDREF(gCSSLoader);
1.339 + }
1.340 +
1.341 + if (gCSSLoader) {
1.342 + gCSSLoader->LoadSheetSync(aURI, aEnableUnsafeRules, true,
1.343 + getter_AddRefs(aSheet));
1.344 + }
1.345 +}
1.346 +
1.347 +nsLayoutStylesheetCache*
1.348 +nsLayoutStylesheetCache::gStyleCache = nullptr;
1.349 +
1.350 +mozilla::css::Loader*
1.351 +nsLayoutStylesheetCache::gCSSLoader = nullptr;
