1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/parser/html/nsParserUtils.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,234 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "nsString.h"
1.10 +#include "nsIComponentManager.h"
1.11 +#include "nsCOMPtr.h"
1.12 +#include "nsXPCOM.h"
1.13 +#include "nsISupportsPrimitives.h"
1.14 +#include "nsXPIDLString.h"
1.15 +#include "nsScriptLoader.h"
1.16 +#include "nsEscape.h"
1.17 +#include "nsIParser.h"
1.18 +#include "nsIDTD.h"
1.19 +#include "nsNetCID.h"
1.20 +#include "nsNetUtil.h"
1.21 +#include "nsParserCIID.h"
1.22 +#include "nsContentUtils.h"
1.23 +#include "nsIContentSink.h"
1.24 +#include "nsIDocumentEncoder.h"
1.25 +#include "nsIDOMDocumentFragment.h"
1.26 +#include "nsIFragmentContentSink.h"
1.27 +#include "nsIDOMDocument.h"
1.28 +#include "nsIDOMNodeList.h"
1.29 +#include "nsIDOMNode.h"
1.30 +#include "nsIDOMElement.h"
1.31 +#include "nsIDocument.h"
1.32 +#include "nsIContent.h"
1.33 +#include "nsAttrName.h"
1.34 +#include "nsHTMLParts.h"
1.35 +#include "nsContentCID.h"
1.36 +#include "nsIScriptableUnescapeHTML.h"
1.37 +#include "nsParserUtils.h"
1.38 +#include "nsAutoPtr.h"
1.39 +#include "nsTreeSanitizer.h"
1.40 +#include "nsHtml5Module.h"
1.41 +#include "mozilla/dom/DocumentFragment.h"
1.42 +
1.43 +#define XHTML_DIV_TAG "div xmlns=\"http://www.w3.org/1999/xhtml\""
1.44 +
1.45 +using namespace mozilla::dom;
1.46 +
1.47 +NS_IMPL_ISUPPORTS(nsParserUtils,
1.48 + nsIScriptableUnescapeHTML,
1.49 + nsIParserUtils)
1.50 +
1.51 +static NS_DEFINE_CID(kCParserCID, NS_PARSER_CID);
1.52 +
1.53 +
1.54 +
1.55 +NS_IMETHODIMP
1.56 +nsParserUtils::ConvertToPlainText(const nsAString& aFromStr,
1.57 + uint32_t aFlags,
1.58 + uint32_t aWrapCol,
1.59 + nsAString& aToStr)
1.60 +{
1.61 + return nsContentUtils::ConvertToPlainText(aFromStr,
1.62 + aToStr,
1.63 + aFlags,
1.64 + aWrapCol);
1.65 +}
1.66 +
1.67 +NS_IMETHODIMP
1.68 +nsParserUtils::Unescape(const nsAString& aFromStr,
1.69 + nsAString& aToStr)
1.70 +{
1.71 + return nsContentUtils::ConvertToPlainText(aFromStr,
1.72 + aToStr,
1.73 + nsIDocumentEncoder::OutputSelectionOnly |
1.74 + nsIDocumentEncoder::OutputAbsoluteLinks,
1.75 + 0);
1.76 +}
1.77 +
1.78 +NS_IMETHODIMP
1.79 +nsParserUtils::Sanitize(const nsAString& aFromStr,
1.80 + uint32_t aFlags,
1.81 + nsAString& aToStr)
1.82 +{
1.83 + nsCOMPtr<nsIURI> uri;
1.84 + NS_NewURI(getter_AddRefs(uri), "about:blank");
1.85 + nsCOMPtr<nsIPrincipal> principal =
1.86 + do_CreateInstance("@mozilla.org/nullprincipal;1");
1.87 + nsCOMPtr<nsIDOMDocument> domDocument;
1.88 + nsresult rv = NS_NewDOMDocument(getter_AddRefs(domDocument),
1.89 + EmptyString(),
1.90 + EmptyString(),
1.91 + nullptr,
1.92 + uri,
1.93 + uri,
1.94 + principal,
1.95 + true,
1.96 + nullptr,
1.97 + DocumentFlavorHTML);
1.98 + NS_ENSURE_SUCCESS(rv, rv);
1.99 +
1.100 + nsCOMPtr<nsIDocument> document = do_QueryInterface(domDocument);
1.101 + rv = nsContentUtils::ParseDocumentHTML(aFromStr, document, false);
1.102 + NS_ENSURE_SUCCESS(rv, rv);
1.103 +
1.104 + nsTreeSanitizer sanitizer(aFlags);
1.105 + sanitizer.Sanitize(document);
1.106 +
1.107 + nsCOMPtr<nsIDocumentEncoder> encoder =
1.108 + do_CreateInstance(NS_DOC_ENCODER_CONTRACTID_BASE "text/html");
1.109 +
1.110 + encoder->NativeInit(document,
1.111 + NS_LITERAL_STRING("text/html"),
1.112 + nsIDocumentEncoder::OutputDontRewriteEncodingDeclaration |
1.113 + nsIDocumentEncoder::OutputNoScriptContent |
1.114 + nsIDocumentEncoder::OutputEncodeBasicEntities |
1.115 + nsIDocumentEncoder::OutputLFLineBreak |
1.116 + nsIDocumentEncoder::OutputRaw);
1.117 +
1.118 + return encoder->EncodeToString(aToStr);
1.119 +}
1.120 +
1.121 +NS_IMETHODIMP
1.122 +nsParserUtils::ParseFragment(const nsAString& aFragment,
1.123 + bool aIsXML,
1.124 + nsIURI* aBaseURI,
1.125 + nsIDOMElement* aContextElement,
1.126 + nsIDOMDocumentFragment** aReturn)
1.127 +{
1.128 + return nsParserUtils::ParseFragment(aFragment,
1.129 + 0,
1.130 + aIsXML,
1.131 + aBaseURI,
1.132 + aContextElement,
1.133 + aReturn);
1.134 +}
1.135 +
1.136 +NS_IMETHODIMP
1.137 +nsParserUtils::ParseFragment(const nsAString& aFragment,
1.138 + uint32_t aFlags,
1.139 + bool aIsXML,
1.140 + nsIURI* aBaseURI,
1.141 + nsIDOMElement* aContextElement,
1.142 + nsIDOMDocumentFragment** aReturn)
1.143 +{
1.144 + NS_ENSURE_ARG(aContextElement);
1.145 + *aReturn = nullptr;
1.146 +
1.147 + nsCOMPtr<nsIDocument> document;
1.148 + nsCOMPtr<nsIDOMDocument> domDocument;
1.149 + nsCOMPtr<nsIDOMNode> contextNode;
1.150 + contextNode = do_QueryInterface(aContextElement);
1.151 + contextNode->GetOwnerDocument(getter_AddRefs(domDocument));
1.152 + document = do_QueryInterface(domDocument);
1.153 + NS_ENSURE_TRUE(document, NS_ERROR_NOT_AVAILABLE);
1.154 +
1.155 + nsAutoScriptBlockerSuppressNodeRemoved autoBlocker;
1.156 +
1.157 + // stop scripts
1.158 + nsRefPtr<nsScriptLoader> loader;
1.159 + bool scripts_enabled = false;
1.160 + if (document) {
1.161 + loader = document->ScriptLoader();
1.162 + scripts_enabled = loader->GetEnabled();
1.163 + }
1.164 + if (scripts_enabled) {
1.165 + loader->SetEnabled(false);
1.166 + }
1.167 +
1.168 + // Wrap things in a div or body for parsing, but it won't show up in
1.169 + // the fragment.
1.170 + nsAutoTArray<nsString, 2> tagStack;
1.171 + nsAutoCString base, spec;
1.172 + if (aIsXML) {
1.173 + // XHTML
1.174 + if (aBaseURI) {
1.175 + base.Append(NS_LITERAL_CSTRING(XHTML_DIV_TAG));
1.176 + base.Append(NS_LITERAL_CSTRING(" xml:base=\""));
1.177 + aBaseURI->GetSpec(spec);
1.178 + // nsEscapeHTML is good enough, because we only need to get
1.179 + // quotes, ampersands, and angle brackets
1.180 + char* escapedSpec = nsEscapeHTML(spec.get());
1.181 + if (escapedSpec)
1.182 + base += escapedSpec;
1.183 + NS_Free(escapedSpec);
1.184 + base.Append(NS_LITERAL_CSTRING("\""));
1.185 + tagStack.AppendElement(NS_ConvertUTF8toUTF16(base));
1.186 + } else {
1.187 + tagStack.AppendElement(NS_LITERAL_STRING(XHTML_DIV_TAG));
1.188 + }
1.189 + }
1.190 +
1.191 + nsresult rv = NS_OK;
1.192 + nsCOMPtr<nsIContent> fragment;
1.193 + if (aIsXML) {
1.194 + rv = nsContentUtils::ParseFragmentXML(aFragment,
1.195 + document,
1.196 + tagStack,
1.197 + true,
1.198 + aReturn);
1.199 + fragment = do_QueryInterface(*aReturn);
1.200 + } else {
1.201 + NS_ADDREF(*aReturn = new DocumentFragment(document->NodeInfoManager()));
1.202 + fragment = do_QueryInterface(*aReturn);
1.203 + rv = nsContentUtils::ParseFragmentHTML(aFragment,
1.204 + fragment,
1.205 + nsGkAtoms::body,
1.206 + kNameSpaceID_XHTML,
1.207 + false,
1.208 + true);
1.209 + // Now, set the base URI on all subtree roots.
1.210 + if (aBaseURI) {
1.211 + aBaseURI->GetSpec(spec);
1.212 + nsAutoString spec16;
1.213 + CopyUTF8toUTF16(spec, spec16);
1.214 + nsIContent* node = fragment->GetFirstChild();
1.215 + while (node) {
1.216 + if (node->IsElement()) {
1.217 + node->SetAttr(kNameSpaceID_XML,
1.218 + nsGkAtoms::base,
1.219 + nsGkAtoms::xml,
1.220 + spec16,
1.221 + false);
1.222 + }
1.223 + node = node->GetNextSibling();
1.224 + }
1.225 + }
1.226 + }
1.227 + if (fragment) {
1.228 + nsTreeSanitizer sanitizer(aFlags);
1.229 + sanitizer.Sanitize(fragment);
1.230 + }
1.231 +
1.232 + if (scripts_enabled) {
1.233 + loader->SetEnabled(true);
1.234 + }
1.235 +
1.236 + return rv;
1.237 +}
