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/*
* Copyright (C) 2000 Peter Kelly (pmk@post.com)
* Copyright (C) 2006-2018 Apple Inc. All rights reserved.
* Copyright (C) 2013 Samsung Electronics. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "ProcessingInstruction.h"
#include "CSSStyleSheet.h"
#include "CachedCSSStyleSheet.h"
#include "CachedResourceLoader.h"
#include "CachedResourceRequest.h"
#include "CachedXSLStyleSheet.h"
#include "Document.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "MediaList.h"
#include "MediaQueryParser.h"
#include "StyleScope.h"
#include "StyleSheetContents.h"
#include "XMLDocumentParser.h"
#include "XSLStyleSheet.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/SetForScope.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(ProcessingInstruction);
inline ProcessingInstruction::ProcessingInstruction(Document& document, const String& target, const String& data)
: CharacterData(document, data, CreateOther)
, m_target(target)
{
}
Ref<ProcessingInstruction> ProcessingInstruction::create(Document& document, const String& target, const String& data)
{
return adoptRef(*new ProcessingInstruction(document, target, data));
}
ProcessingInstruction::~ProcessingInstruction()
{
if (m_sheet)
m_sheet->clearOwnerNode();
if (m_cachedSheet)
m_cachedSheet->removeClient(*this);
if (isConnected())
document().styleScope().removeStyleSheetCandidateNode(*this);
}
String ProcessingInstruction::nodeName() const
{
return m_target;
}
Node::NodeType ProcessingInstruction::nodeType() const
{
return PROCESSING_INSTRUCTION_NODE;
}
Ref<Node> ProcessingInstruction::cloneNodeInternal(Document& targetDocument, CloningOperation)
{
// FIXME: Is it a problem that this does not copy m_localHref?
// What about other data members?
return create(targetDocument, m_target, data());
}
void ProcessingInstruction::checkStyleSheet()
{
// Prevent recursive loading of stylesheet.
if (m_isHandlingBeforeLoad)
return;
if (m_target == "xml-stylesheet" && document().frame() && parentNode() == &document()) {
// see http://www.w3.org/TR/xml-stylesheet/
// ### support stylesheet included in a fragment of this (or another) document
// ### make sure this gets called when adding from javascript
auto attributes = parseAttributes(data());
if (!attributes)
return;
String type = attributes->get("type");
m_isCSS = type.isEmpty() || type == "text/css";
#if ENABLE(XSLT)
m_isXSL = type == "text/xml" || type == "text/xsl" || type == "application/xml" || type == "application/xhtml+xml" || type == "application/rss+xml" || type == "application/atom+xml";
if (!m_isCSS && !m_isXSL)
#else
if (!m_isCSS)
#endif
return;
String href = attributes->get("href");
String alternate = attributes->get("alternate");
m_alternate = alternate == "yes";
m_title = attributes->get("title");
m_media = attributes->get("media");
if (m_alternate && m_title.isEmpty())
return;
if (href.length() > 1 && href[0] == '#') {
m_localHref = href.substring(1);
#if ENABLE(XSLT)
// We need to make a synthetic XSLStyleSheet that is embedded. It needs to be able
// to kick off import/include loads that can hang off some parent sheet.
if (m_isXSL) {
URL finalURL(ParsedURLString, m_localHref);
m_sheet = XSLStyleSheet::createEmbedded(this, finalURL);
m_loading = false;
document().scheduleToApplyXSLTransforms();
}
#endif
} else {
if (m_cachedSheet) {
m_cachedSheet->removeClient(*this);
m_cachedSheet = nullptr;
}
if (m_loading) {
m_loading = false;
document().styleScope().removePendingSheet(*this);
}
Ref<Document> originalDocument = document();
String url = document().completeURL(href).string();
{
SetForScope<bool> change(m_isHandlingBeforeLoad, true);
if (!dispatchBeforeLoadEvent(url))
return;
}
bool didEventListenerDisconnectThisElement = !isConnected() || &document() != originalDocument.ptr();
if (didEventListenerDisconnectThisElement)
return;
m_loading = true;
document().styleScope().addPendingSheet(*this);
ASSERT_WITH_SECURITY_IMPLICATION(!m_cachedSheet);
#if ENABLE(XSLT)
if (m_isXSL) {
auto options = CachedResourceLoader::defaultCachedResourceOptions();
options.mode = FetchOptions::Mode::SameOrigin;
m_cachedSheet = document().cachedResourceLoader().requestXSLStyleSheet({ResourceRequest(document().completeURL(href)), options}).value_or(nullptr);
} else
#endif
{
String charset = attributes->get("charset");
CachedResourceRequest request(document().completeURL(href), CachedResourceLoader::defaultCachedResourceOptions(), std::nullopt, charset.isEmpty() ? document().charset() : WTFMove(charset));
m_cachedSheet = document().cachedResourceLoader().requestCSSStyleSheet(WTFMove(request)).value_or(nullptr);
}
if (m_cachedSheet)
m_cachedSheet->addClient(*this);
else {
// The request may have been denied if (for example) the stylesheet is local and the document is remote.
m_loading = false;
document().styleScope().removePendingSheet(*this);
#if ENABLE(XSLT)
if (m_isXSL)
document().scheduleToApplyXSLTransforms();
#endif
}
}
}
}
bool ProcessingInstruction::isLoading() const
{
if (m_loading)
return true;
if (!m_sheet)
return false;
return m_sheet->isLoading();
}
bool ProcessingInstruction::sheetLoaded()
{
if (!isLoading()) {
if (document().styleScope().hasPendingSheet(*this))
document().styleScope().removePendingSheet(*this);
#if ENABLE(XSLT)
if (m_isXSL)
document().scheduleToApplyXSLTransforms();
#endif
return true;
}
return false;
}
void ProcessingInstruction::setCSSStyleSheet(const String& href, const URL& baseURL, const String& charset, const CachedCSSStyleSheet* sheet)
{
if (!isConnected()) {
ASSERT(!m_sheet);
return;
}
ASSERT(m_isCSS);
CSSParserContext parserContext(document(), baseURL, charset);
auto cssSheet = CSSStyleSheet::create(StyleSheetContents::create(href, parserContext), *this);
cssSheet.get().setDisabled(m_alternate);
cssSheet.get().setTitle(m_title);
cssSheet.get().setMediaQueries(MediaQuerySet::create(m_media, MediaQueryParserContext(document())));
m_sheet = WTFMove(cssSheet);
// We don't need the cross-origin security check here because we are
// getting the sheet text in "strict" mode. This enforces a valid CSS MIME
// type.
Ref<Document> protect(document());
parseStyleSheet(sheet->sheetText());
}
#if ENABLE(XSLT)
void ProcessingInstruction::setXSLStyleSheet(const String& href, const URL& baseURL, const String& sheet)
{
ASSERT(m_isXSL);
m_sheet = XSLStyleSheet::create(this, href, baseURL);
Ref<Document> protect(document());
parseStyleSheet(sheet);
}
#endif
void ProcessingInstruction::parseStyleSheet(const String& sheet)
{
if (m_isCSS)
downcast<CSSStyleSheet>(*m_sheet).contents().parseString(sheet);
#if ENABLE(XSLT)
else if (m_isXSL)
downcast<XSLStyleSheet>(*m_sheet).parseString(sheet);
#endif
if (m_cachedSheet)
m_cachedSheet->removeClient(*this);
m_cachedSheet = nullptr;
m_loading = false;
if (m_isCSS)
downcast<CSSStyleSheet>(*m_sheet).contents().checkLoaded();
#if ENABLE(XSLT)
else if (m_isXSL)
downcast<XSLStyleSheet>(*m_sheet).checkLoaded();
#endif
}
void ProcessingInstruction::addSubresourceAttributeURLs(ListHashSet<URL>& urls) const
{
if (!sheet())
return;
addSubresourceURL(urls, sheet()->baseURL());
}
Node::InsertedIntoAncestorResult ProcessingInstruction::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
{
CharacterData::insertedIntoAncestor(insertionType, parentOfInsertedTree);
if (!insertionType.connectedToDocument)
return InsertedIntoAncestorResult::Done;
document().styleScope().addStyleSheetCandidateNode(*this, m_createdByParser);
return InsertedIntoAncestorResult::NeedsPostInsertionCallback;
}
void ProcessingInstruction::didFinishInsertingNode()
{
checkStyleSheet();
}
void ProcessingInstruction::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
{
CharacterData::removedFromAncestor(removalType, oldParentOfRemovedTree);
if (!removalType.disconnectedFromDocument)
return;
document().styleScope().removeStyleSheetCandidateNode(*this);
if (m_sheet) {
ASSERT(m_sheet->ownerNode() == this);
m_sheet->clearOwnerNode();
m_sheet = nullptr;
}
if (m_loading) {
m_loading = false;
document().styleScope().removePendingSheet(*this);
}
document().styleScope().didChangeActiveStyleSheetCandidates();
}
void ProcessingInstruction::finishParsingChildren()
{
m_createdByParser = false;
CharacterData::finishParsingChildren();
}
} // namespace