Source/WebCore/html/HTMLDocument.cpp - WebKit - Git at Google

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. 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.
  *
  * Portions are Copyright (C) 2002 Netscape Communications Corporation.
  * Other contributors: David Baron <dbaron@fas.harvard.edu>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  *
  * Alternatively, the document type parsing portions of this file may be used
  * under the terms of either the Mozilla Public License Version 1.1, found at
  * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
  * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
  * (the "GPL"), in which case the provisions of the MPL or the GPL are
  * applicable instead of those above.  If you wish to allow use of your
  * version of this file only under the terms of one of those two
  * licenses (the MPL or the GPL) and not to allow others to use your
  * version of this file under the LGPL, indicate your decision by
  * deleting the provisions above and replace them with the notice and
  * other provisions required by the MPL or the GPL, as the case may be.
  * If you do not delete the provisions above, a recipient may use your
  * version of this file under any of the LGPL, the MPL or the GPL.
  */

 #include "config.h"
 #include "HTMLDocument.h"

 #include "CSSPropertyNames.h"
 #include "CommonVM.h"
 #include "CookieJar.h"
 #include "DOMWindow.h"
 #include "DocumentLoader.h"
 #include "DocumentType.h"
 #include "ElementChildIterator.h"
 #include "FocusController.h"
 #include "Frame.h"
 #include "FrameLoader.h"
 #include "FrameTree.h"
 #include "FrameView.h"
 #include "HTMLBodyElement.h"
 #include "HTMLCollection.h"
 #include "HTMLDocumentParser.h"
 #include "HTMLElementFactory.h"
 #include "HTMLFrameOwnerElement.h"
 #include "HTMLFrameSetElement.h"
 #include "HTMLHtmlElement.h"
 #include "HTMLIFrameElement.h"
 #include "HTMLNames.h"
 #include "HashTools.h"
 #include "ScriptController.h"
 #include "StyleResolver.h"
 #include <wtf/IsoMallocInlines.h>
 #include <wtf/text/CString.h>

 namespace WebCore {

 WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLDocument);

 using namespace HTMLNames;

 HTMLDocument::HTMLDocument(Frame* frame, const URL& url, DocumentClassFlags documentClasses, unsigned constructionFlags)
     : Document(frame, url, documentClasses | HTMLDocumentClass, constructionFlags)
 {
     clearXMLVersion();
 }

 HTMLDocument::~HTMLDocument() = default;

 int HTMLDocument::width()
 {
     updateLayoutIgnorePendingStylesheets();
     RefPtr<FrameView> frameView = view();
     return frameView ? frameView->contentsWidth() : 0;
 }

 int HTMLDocument::height()
 {
     updateLayoutIgnorePendingStylesheets();
     RefPtr<FrameView> frameView = view();
     return frameView ? frameView->contentsHeight() : 0;
 }

 Ref<DocumentParser> HTMLDocument::createParser()
 {
     return HTMLDocumentParser::create(*this);
 }

 // https://html.spec.whatwg.org/multipage/dom.html#dom-document-nameditem
 std::optional<Variant<RefPtr<DOMWindow>, RefPtr<Element>, RefPtr<HTMLCollection>>> HTMLDocument::namedItem(const AtomicString& name)
 {
     if (name.isNull() || !hasDocumentNamedItem(*name.impl()))
         return std::nullopt;

     if (UNLIKELY(documentNamedItemContainsMultipleElements(*name.impl()))) {
         auto collection = documentNamedItems(name);
         ASSERT(collection->length() > 1);
         return Variant<RefPtr<DOMWindow>, RefPtr<Element>, RefPtr<HTMLCollection>> { RefPtr<HTMLCollection> { WTFMove(collection) } };
     }

     auto& element = *documentNamedItem(*name.impl());
     if (UNLIKELY(is<HTMLIFrameElement>(element))) {
         if (auto domWindow = makeRefPtr(downcast<HTMLIFrameElement>(element).contentWindow()))
             return Variant<RefPtr<DOMWindow>, RefPtr<Element>, RefPtr<HTMLCollection>> { WTFMove(domWindow) };
     }

     return Variant<RefPtr<DOMWindow>, RefPtr<Element>, RefPtr<HTMLCollection>> { RefPtr<Element> { &element } };
 }

 Vector<AtomicString> HTMLDocument::supportedPropertyNames() const
 {
     // https://html.spec.whatwg.org/multipage/dom.html#dom-document-namedItem-which
     //
     // ... The supported property names of a Document object document at any moment consist of the following, in
     // tree order according to the element that contributed them, ignoring later duplicates, and with values from
     // id attributes coming before values from name attributes when the same element contributes both:
     //
     // - the value of the name content attribute for all applet, exposed embed, form, iframe, img, and exposed
     //   object elements that have a non-empty name content attribute and are in a document tree with document
     //   as their root;
     // - the value of the id content attribute for all applet and exposed object elements that have a non-empty
     //   id content attribute and are in a document tree with document as their root; and
     // - the value of the id content attribute for all img elements that have both a non-empty id content attribute
     //   and a non-empty name content attribute, and are in a document tree with document as their root.

     // FIXME: Implement.
     return { };
 }

 void HTMLDocument::addDocumentNamedItem(const AtomicStringImpl& name, Element& item)
 {
     m_documentNamedItem.add(name, item, *this);
     addImpureProperty(AtomicString(const_cast<AtomicStringImpl*>(&name)));
 }

 void HTMLDocument::removeDocumentNamedItem(const AtomicStringImpl& name, Element& item)
 {
     m_documentNamedItem.remove(name, item);
 }

 void HTMLDocument::addWindowNamedItem(const AtomicStringImpl& name, Element& item)
 {
     m_windowNamedItem.add(name, item, *this);
 }

 void HTMLDocument::removeWindowNamedItem(const AtomicStringImpl& name, Element& item)
 {
     m_windowNamedItem.remove(name, item);
 }

 bool HTMLDocument::isCaseSensitiveAttribute(const QualifiedName& attributeName)
 {
     static const auto caseInsensitiveAttributeSet = makeNeverDestroyed([] {
         // This is the list of attributes in HTML 4.01 with values marked as "[CI]" or case-insensitive
         // Mozilla treats all other values as case-sensitive, thus so do we.
         static const QualifiedName* const names[] = {
             &accept_charsetAttr.get(),
             &acceptAttr.get(),
             &alignAttr.get(),
             &alinkAttr.get(),
             &axisAttr.get(),
             &bgcolorAttr.get(),
             &charsetAttr.get(),
             &checkedAttr.get(),
             &clearAttr.get(),
             &codetypeAttr.get(),
             &colorAttr.get(),
             &compactAttr.get(),
             &declareAttr.get(),
             &deferAttr.get(),
             &dirAttr.get(),
             &disabledAttr.get(),
             &enctypeAttr.get(),
             &faceAttr.get(),
             &frameAttr.get(),
             &hreflangAttr.get(),
             &http_equivAttr.get(),
             &langAttr.get(),
             &languageAttr.get(),
             &linkAttr.get(),
             &mediaAttr.get(),
             &methodAttr.get(),
             &multipleAttr.get(),
             &nohrefAttr.get(),
             &noresizeAttr.get(),
             &noshadeAttr.get(),
             &nowrapAttr.get(),
             &readonlyAttr.get(),
             &relAttr.get(),
             &revAttr.get(),
             &rulesAttr.get(),
             &scopeAttr.get(),
             &scrollingAttr.get(),
             &selectedAttr.get(),
             &shapeAttr.get(),
             &targetAttr.get(),
             &textAttr.get(),
             &typeAttr.get(),
             &valignAttr.get(),
             &valuetypeAttr.get(),
             &vlinkAttr.get(),
         };
         HashSet<AtomicString> set;
         for (auto* name : names)
             set.add(name->localName());
         return set;
     }());

     bool isPossibleHTMLAttr = !attributeName.hasPrefix() && attributeName.namespaceURI().isNull();
     return !isPossibleHTMLAttr || !caseInsensitiveAttributeSet.get().contains(attributeName.localName());
 }

 bool HTMLDocument::isFrameSet() const
 {
     if (!documentElement())
         return false;
     return !!childrenOfType<HTMLFrameSetElement>(*documentElement()).first();
 }

 Ref<Document> HTMLDocument::cloneDocumentWithoutChildren() const
 {
     return create(nullptr, url());
 }

 }
	/*
	* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
	* (C) 1999 Antti Koivisto (koivisto@kde.org)
	* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. 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.
	*
	* Portions are Copyright (C) 2002 Netscape Communications Corporation.
	* Other contributors: David Baron <dbaron@fas.harvard.edu>
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 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
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with this library; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	*
	* Alternatively, the document type parsing portions of this file may be used
	* under the terms of either the Mozilla Public License Version 1.1, found at
	* http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
	* License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
	* (the "GPL"), in which case the provisions of the MPL or the GPL are
	* applicable instead of those above. If you wish to allow use of your
	* version of this file only under the terms of one of those two
	* licenses (the MPL or the GPL) and not to allow others to use your
	* version of this file under the LGPL, indicate your decision by
	* deleting the provisions above and replace them with the notice and
	* other provisions required by the MPL or the GPL, as the case may be.
	* If you do not delete the provisions above, a recipient may use your
	* version of this file under any of the LGPL, the MPL or the GPL.
	*/

	#include "config.h"
	#include "HTMLDocument.h"

	#include "CSSPropertyNames.h"
	#include "CommonVM.h"
	#include "CookieJar.h"
	#include "DOMWindow.h"
	#include "DocumentLoader.h"
	#include "DocumentType.h"
	#include "ElementChildIterator.h"
	#include "FocusController.h"
	#include "Frame.h"
	#include "FrameLoader.h"
	#include "FrameTree.h"
	#include "FrameView.h"
	#include "HTMLBodyElement.h"
	#include "HTMLCollection.h"
	#include "HTMLDocumentParser.h"
	#include "HTMLElementFactory.h"
	#include "HTMLFrameOwnerElement.h"
	#include "HTMLFrameSetElement.h"
	#include "HTMLHtmlElement.h"
	#include "HTMLIFrameElement.h"
	#include "HTMLNames.h"
	#include "HashTools.h"
	#include "ScriptController.h"
	#include "StyleResolver.h"
	#include <wtf/IsoMallocInlines.h>
	#include <wtf/text/CString.h>

	namespace WebCore {

	WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLDocument);

	using namespace HTMLNames;

	HTMLDocument::HTMLDocument(Frame* frame, const URL& url, DocumentClassFlags documentClasses, unsigned constructionFlags)
	: Document(frame, url, documentClasses \| HTMLDocumentClass, constructionFlags)
	{
	clearXMLVersion();
	}

	HTMLDocument::~HTMLDocument() = default;

	int HTMLDocument::width()
	{
	updateLayoutIgnorePendingStylesheets();
	RefPtr<FrameView> frameView = view();
	return frameView ? frameView->contentsWidth() : 0;
	}

	int HTMLDocument::height()
	{
	updateLayoutIgnorePendingStylesheets();
	RefPtr<FrameView> frameView = view();
	return frameView ? frameView->contentsHeight() : 0;
	}

	Ref<DocumentParser> HTMLDocument::createParser()
	{
	return HTMLDocumentParser::create(*this);
	}

	// https://html.spec.whatwg.org/multipage/dom.html#dom-document-nameditem
	std::optional<Variant<RefPtr<DOMWindow>, RefPtr<Element>, RefPtr<HTMLCollection>>> HTMLDocument::namedItem(const AtomicString& name)
	{
	if (name.isNull() \|\| !hasDocumentNamedItem(*name.impl()))
	return std::nullopt;

	if (UNLIKELY(documentNamedItemContainsMultipleElements(*name.impl()))) {
	auto collection = documentNamedItems(name);
	ASSERT(collection->length() > 1);
	return Variant<RefPtr<DOMWindow>, RefPtr<Element>, RefPtr<HTMLCollection>> { RefPtr<HTMLCollection> { WTFMove(collection) } };
	}

	auto& element = documentNamedItem(name.impl());
	if (UNLIKELY(is<HTMLIFrameElement>(element))) {
	if (auto domWindow = makeRefPtr(downcast<HTMLIFrameElement>(element).contentWindow()))
	return Variant<RefPtr<DOMWindow>, RefPtr<Element>, RefPtr<HTMLCollection>> { WTFMove(domWindow) };
	}

	return Variant<RefPtr<DOMWindow>, RefPtr<Element>, RefPtr<HTMLCollection>> { RefPtr<Element> { &element } };
	}

	Vector<AtomicString> HTMLDocument::supportedPropertyNames() const
	{
	// https://html.spec.whatwg.org/multipage/dom.html#dom-document-namedItem-which
	//
	// ... The supported property names of a Document object document at any moment consist of the following, in
	// tree order according to the element that contributed them, ignoring later duplicates, and with values from
	// id attributes coming before values from name attributes when the same element contributes both:
	//
	// - the value of the name content attribute for all applet, exposed embed, form, iframe, img, and exposed
	// object elements that have a non-empty name content attribute and are in a document tree with document
	// as their root;
	// - the value of the id content attribute for all applet and exposed object elements that have a non-empty
	// id content attribute and are in a document tree with document as their root; and
	// - the value of the id content attribute for all img elements that have both a non-empty id content attribute
	// and a non-empty name content attribute, and are in a document tree with document as their root.

	// FIXME: Implement.
	return { };
	}

	void HTMLDocument::addDocumentNamedItem(const AtomicStringImpl& name, Element& item)
	{
	m_documentNamedItem.add(name, item, *this);
	addImpureProperty(AtomicString(const_cast<AtomicStringImpl*>(&name)));
	}

	void HTMLDocument::removeDocumentNamedItem(const AtomicStringImpl& name, Element& item)
	{
	m_documentNamedItem.remove(name, item);
	}

	void HTMLDocument::addWindowNamedItem(const AtomicStringImpl& name, Element& item)
	{
	m_windowNamedItem.add(name, item, *this);
	}

	void HTMLDocument::removeWindowNamedItem(const AtomicStringImpl& name, Element& item)
	{
	m_windowNamedItem.remove(name, item);
	}

	bool HTMLDocument::isCaseSensitiveAttribute(const QualifiedName& attributeName)
	{
	static const auto caseInsensitiveAttributeSet = makeNeverDestroyed([] {
	// This is the list of attributes in HTML 4.01 with values marked as "[CI]" or case-insensitive
	// Mozilla treats all other values as case-sensitive, thus so do we.
	static const QualifiedName* const names[] = {
	&accept_charsetAttr.get(),
	&acceptAttr.get(),
	&alignAttr.get(),
	&alinkAttr.get(),
	&axisAttr.get(),
	&bgcolorAttr.get(),
	&charsetAttr.get(),
	&checkedAttr.get(),
	&clearAttr.get(),
	&codetypeAttr.get(),
	&colorAttr.get(),
	&compactAttr.get(),
	&declareAttr.get(),
	&deferAttr.get(),
	&dirAttr.get(),
	&disabledAttr.get(),
	&enctypeAttr.get(),
	&faceAttr.get(),
	&frameAttr.get(),
	&hreflangAttr.get(),
	&http_equivAttr.get(),
	&langAttr.get(),
	&languageAttr.get(),
	&linkAttr.get(),
	&mediaAttr.get(),
	&methodAttr.get(),
	&multipleAttr.get(),
	&nohrefAttr.get(),
	&noresizeAttr.get(),
	&noshadeAttr.get(),
	&nowrapAttr.get(),
	&readonlyAttr.get(),
	&relAttr.get(),
	&revAttr.get(),
	&rulesAttr.get(),
	&scopeAttr.get(),
	&scrollingAttr.get(),
	&selectedAttr.get(),
	&shapeAttr.get(),
	&targetAttr.get(),
	&textAttr.get(),
	&typeAttr.get(),
	&valignAttr.get(),
	&valuetypeAttr.get(),
	&vlinkAttr.get(),
	};
	HashSet<AtomicString> set;
	for (auto* name : names)
	set.add(name->localName());
	return set;
	}());

	bool isPossibleHTMLAttr = !attributeName.hasPrefix() && attributeName.namespaceURI().isNull();
	return !isPossibleHTMLAttr \|\| !caseInsensitiveAttributeSet.get().contains(attributeName.localName());
	}

	bool HTMLDocument::isFrameSet() const
	{
	if (!documentElement())
	return false;
	return !!childrenOfType<HTMLFrameSetElement>(*documentElement()).first();
	}

	Ref<Document> HTMLDocument::cloneDocumentWithoutChildren() const
	{
	return create(nullptr, url());
	}

	}