Source code

Revision control

Copy as Markdown

Other Tools

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