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/* -*- 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 "nsString.h"
#include "nsIComponentManager.h"
#include "nsCOMPtr.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsXPIDLString.h"
#include "nsScriptLoader.h"
#include "nsEscape.h"
#include "nsIParser.h"
#include "nsIDTD.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsParserCIID.h"
#include "nsContentUtils.h"
#include "nsIContentSink.h"
#include "nsIDocumentEncoder.h"
#include "nsIDOMDocumentFragment.h"
#include "nsIFragmentContentSink.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMNode.h"
#include "nsIDOMElement.h"
#include "nsIDocument.h"
#include "nsIContent.h"
#include "nsAttrName.h"
#include "nsHTMLParts.h"
#include "nsContentCID.h"
#include "nsIScriptableUnescapeHTML.h"
#include "nsParserUtils.h"
#include "nsAutoPtr.h"
#include "nsTreeSanitizer.h"
#include "nsHtml5Module.h"
#include "mozilla/dom/DocumentFragment.h"
#include "nsNullPrincipal.h"
#define XHTML_DIV_TAG "div xmlns=\"http://www.w3.org/1999/xhtml\""
using namespace mozilla::dom;
NS_IMPL_ISUPPORTS(nsParserUtils,
nsIScriptableUnescapeHTML,
nsIParserUtils)
NS_IMETHODIMP
nsParserUtils::ConvertToPlainText(const nsAString& aFromStr,
uint32_t aFlags,
uint32_t aWrapCol,
nsAString& aToStr)
{
return nsContentUtils::ConvertToPlainText(aFromStr,
aToStr,
aFlags,
aWrapCol);
}
NS_IMETHODIMP
nsParserUtils::Unescape(const nsAString& aFromStr,
nsAString& aToStr)
{
return nsContentUtils::ConvertToPlainText(aFromStr,
aToStr,
nsIDocumentEncoder::OutputSelectionOnly |
nsIDocumentEncoder::OutputAbsoluteLinks,
0);
}
NS_IMETHODIMP
nsParserUtils::Sanitize(const nsAString& aFromStr,
uint32_t aFlags,
nsAString& aToStr)
{
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), "about:blank");
nsCOMPtr<nsIPrincipal> principal = nsNullPrincipal::Create();
nsCOMPtr<nsIDOMDocument> domDocument;
nsresult rv = NS_NewDOMDocument(getter_AddRefs(domDocument),
EmptyString(),
EmptyString(),
nullptr,
uri,
uri,
principal,
true,
nullptr,
DocumentFlavorHTML);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDocument> document = do_QueryInterface(domDocument);
rv = nsContentUtils::ParseDocumentHTML(aFromStr, document, false);
NS_ENSURE_SUCCESS(rv, rv);
nsTreeSanitizer sanitizer(aFlags);
sanitizer.Sanitize(document);
nsCOMPtr<nsIDocumentEncoder> encoder =
do_CreateInstance(NS_DOC_ENCODER_CONTRACTID_BASE "text/html");
encoder->NativeInit(document,
NS_LITERAL_STRING("text/html"),
nsIDocumentEncoder::OutputDontRewriteEncodingDeclaration |
nsIDocumentEncoder::OutputNoScriptContent |
nsIDocumentEncoder::OutputEncodeBasicEntities |
nsIDocumentEncoder::OutputLFLineBreak |
nsIDocumentEncoder::OutputRaw);
return encoder->EncodeToString(aToStr);
}
NS_IMETHODIMP
nsParserUtils::ParseFragment(const nsAString& aFragment,
bool aIsXML,
nsIURI* aBaseURI,
nsIDOMElement* aContextElement,
nsIDOMDocumentFragment** aReturn)
{
return nsParserUtils::ParseFragment(aFragment,
0,
aIsXML,
aBaseURI,
aContextElement,
aReturn);
}
NS_IMETHODIMP
nsParserUtils::ParseFragment(const nsAString& aFragment,
uint32_t aFlags,
bool aIsXML,
nsIURI* aBaseURI,
nsIDOMElement* aContextElement,
nsIDOMDocumentFragment** aReturn)
{
NS_ENSURE_ARG(aContextElement);
*aReturn = nullptr;
nsCOMPtr<nsIDocument> document;
nsCOMPtr<nsIDOMDocument> domDocument;
nsCOMPtr<nsIDOMNode> contextNode;
contextNode = do_QueryInterface(aContextElement);
contextNode->GetOwnerDocument(getter_AddRefs(domDocument));
document = do_QueryInterface(domDocument);
NS_ENSURE_TRUE(document, NS_ERROR_NOT_AVAILABLE);
nsAutoScriptBlockerSuppressNodeRemoved autoBlocker;
// stop scripts
RefPtr<nsScriptLoader> loader;
bool scripts_enabled = false;
if (document) {
loader = document->ScriptLoader();
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;
nsAutoCString base, spec;
if (aIsXML) {
// XHTML
if (aBaseURI) {
base.AppendLiteral(XHTML_DIV_TAG);
base.AppendLiteral(" xml:base=\"");
rv = aBaseURI->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
// nsEscapeHTML is good enough, because we only need to get
// quotes, ampersands, and angle brackets
char* escapedSpec = nsEscapeHTML(spec.get());
if (escapedSpec)
base += escapedSpec;
free(escapedSpec);
base.Append('"');
tagStack.AppendElement(NS_ConvertUTF8toUTF16(base));
} else {
tagStack.AppendElement(NS_LITERAL_STRING(XHTML_DIV_TAG));
}
}
nsCOMPtr<nsIContent> fragment;
if (aIsXML) {
rv = nsContentUtils::ParseFragmentXML(aFragment,
document,
tagStack,
true,
aReturn);
fragment = do_QueryInterface(*aReturn);
} else {
NS_ADDREF(*aReturn = new DocumentFragment(document->NodeInfoManager()));
fragment = do_QueryInterface(*aReturn);
rv = nsContentUtils::ParseFragmentHTML(aFragment,
fragment,
nsGkAtoms::body,
kNameSpaceID_XHTML,
false,
true);
// Now, set the base URI on all subtree roots.
if (aBaseURI) {
nsresult rv2 = aBaseURI->GetSpec(spec);
NS_ENSURE_SUCCESS(rv2, rv2);
nsAutoString spec16;
CopyUTF8toUTF16(spec, spec16);
nsIContent* node = fragment->GetFirstChild();
while (node) {
if (node->IsElement()) {
node->SetAttr(kNameSpaceID_XML,
nsGkAtoms::base,
nsGkAtoms::xml,
spec16,
false);
}
node = node->GetNextSibling();
}
}
}
if (fragment) {
nsTreeSanitizer sanitizer(aFlags);
sanitizer.Sanitize(fragment);
}
if (scripts_enabled) {
loader->SetEnabled(true);
}
return rv;
}
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