forked from mirrors/gecko-dev
127 lines
4.3 KiB
C++
127 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsParserUtils.h"
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#include "mozilla/NullPrincipal.h"
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#include "mozilla/UniquePtr.h"
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#include "mozilla/dom/DocumentFragment.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/ScriptLoader.h"
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#include "nsAttrName.h"
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#include "nsCOMPtr.h"
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#include "nsContentCID.h"
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#include "nsContentUtils.h"
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#include "nsEscape.h"
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#include "nsHTMLParts.h"
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#include "nsHtml5Module.h"
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#include "nsIContent.h"
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#include "nsIContentSink.h"
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#include "nsIDTD.h"
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#include "mozilla/dom/Document.h"
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#include "nsIDocumentEncoder.h"
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#include "nsIFragmentContentSink.h"
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#include "nsIParser.h"
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#include "nsNetCID.h"
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#include "nsNetUtil.h"
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#include "nsString.h"
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#include "nsTreeSanitizer.h"
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#include "nsXPCOM.h"
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#define XHTML_DIV_TAG u"div xmlns=\"http://www.w3.org/1999/xhtml\""
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using namespace mozilla::dom;
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NS_IMPL_ISUPPORTS(nsParserUtils, nsIParserUtils)
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NS_IMETHODIMP
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nsParserUtils::ConvertToPlainText(const nsAString& aFromStr, uint32_t aFlags,
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uint32_t aWrapCol, nsAString& aToStr) {
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return nsContentUtils::ConvertToPlainText(aFromStr, aToStr, aFlags, aWrapCol);
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}
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template <typename Callable>
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static nsresult SanitizeWith(const nsAString& aInput, nsAString& aOutput,
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Callable aDoSanitize) {
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RefPtr<Document> document = nsContentUtils::CreateInertHTMLDocument(nullptr);
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if (!document) {
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return NS_ERROR_FAILURE;
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}
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nsresult rv = nsContentUtils::ParseDocumentHTML(aInput, document, false);
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NS_ENSURE_SUCCESS(rv, rv);
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aDoSanitize(document.get());
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nsCOMPtr<nsIDocumentEncoder> encoder = do_createDocumentEncoder("text/html");
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encoder->NativeInit(document, u"text/html"_ns,
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nsIDocumentEncoder::OutputDontRewriteEncodingDeclaration |
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nsIDocumentEncoder::OutputNoScriptContent |
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nsIDocumentEncoder::OutputEncodeBasicEntities |
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nsIDocumentEncoder::OutputLFLineBreak |
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nsIDocumentEncoder::OutputRaw);
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return encoder->EncodeToString(aOutput);
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}
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NS_IMETHODIMP
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nsParserUtils::Sanitize(const nsAString& aFromStr, uint32_t aFlags,
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nsAString& aToStr) {
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return SanitizeWith(aFromStr, aToStr, [&](Document* aDocument) {
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nsTreeSanitizer sanitizer(aFlags);
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sanitizer.Sanitize(aDocument);
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});
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}
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NS_IMETHODIMP
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nsParserUtils::RemoveConditionalCSS(const nsAString& aFromStr,
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nsAString& aToStr) {
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return SanitizeWith(aFromStr, aToStr, [](Document* aDocument) {
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nsTreeSanitizer::RemoveConditionalCSSFromSubtree(aDocument);
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});
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}
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NS_IMETHODIMP
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nsParserUtils::ParseFragment(const nsAString& aFragment, uint32_t aFlags,
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bool aIsXML, nsIURI* aBaseURI,
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Element* aContextElement,
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DocumentFragment** aReturn) {
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NS_ENSURE_ARG(aContextElement);
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*aReturn = nullptr;
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RefPtr<Document> document = aContextElement->OwnerDoc();
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nsAutoScriptBlockerSuppressNodeRemoved autoBlocker;
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// stop scripts
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RefPtr<ScriptLoader> loader = document->ScriptLoader();
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bool scripts_enabled = loader->GetEnabled();
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if (scripts_enabled) {
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loader->SetEnabled(false);
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}
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// Wrap things in a div or body for parsing, but it won't show up in
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// the fragment.
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nsresult rv = NS_OK;
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AutoTArray<nsString, 2> tagStack;
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RefPtr<DocumentFragment> fragment;
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if (aIsXML) {
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// XHTML
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tagStack.AppendElement(nsLiteralString(XHTML_DIV_TAG));
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rv = nsContentUtils::ParseFragmentXML(aFragment, document, tagStack, true,
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aFlags, getter_AddRefs(fragment));
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} else {
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fragment = new (document->NodeInfoManager())
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DocumentFragment(document->NodeInfoManager());
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rv = nsContentUtils::ParseFragmentHTML(aFragment, fragment, nsGkAtoms::body,
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kNameSpaceID_XHTML, false, true,
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aFlags);
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}
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if (scripts_enabled) {
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loader->SetEnabled(true);
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}
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fragment.forget(aReturn);
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return rv;
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}
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