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/*
* Copyright (C) 2006, 2007 Rob Buis
* Copyright (C) 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.
*/
#include "config.h"
#include "StyleElement.h"
#include "Document.h"
#include "Element.h"
#include "MappedAttribute.h"
#include "MediaList.h"
#include "MediaQueryEvaluator.h"
namespace WebCore {
StyleElement::StyleElement()
{
}
StyleSheet* StyleElement::sheet(Element* e)
{
if (!m_sheet)
createSheet(e);
return m_sheet.get();
}
void StyleElement::insertedIntoDocument(Document*, Element* element)
{
process(element);
}
void StyleElement::removedFromDocument(Document* document)
{
// If we're in document teardown, then we don't need to do any notification of our sheet's removal.
if (!document->renderer())
return;
// FIXME: It's terrible to do a synchronous update of the style selector just because a <style> or <link> element got removed.
if (m_sheet)
document->updateStyleSelector();
}
void StyleElement::process(Element* e)
{
if (!e || !e->inDocument())
return;
unsigned resultLength = 0;
for (Node* c = e->firstChild(); c; c = c->nextSibling()) {
Node::NodeType nodeType = c->nodeType();
if (nodeType == Node::TEXT_NODE || nodeType == Node::CDATA_SECTION_NODE || nodeType == Node::COMMENT_NODE)
resultLength += c->nodeValue().length();
}
UChar* text;
String sheetText = String::createUninitialized(resultLength, text);
UChar* p = text;
for (Node* c = e->firstChild(); c; c = c->nextSibling()) {
Node::NodeType nodeType = c->nodeType();
if (nodeType == Node::TEXT_NODE || nodeType == Node::CDATA_SECTION_NODE || nodeType == Node::COMMENT_NODE) {
String nodeValue = c->nodeValue();
unsigned nodeLength = nodeValue.length();
memcpy(p, nodeValue.characters(), nodeLength * sizeof(UChar));
p += nodeLength;
}
}
ASSERT(p == text + resultLength);
createSheet(e, sheetText);
}
void StyleElement::createSheet(Element* e, const String& text)
{
Document* document = e->document();
if (m_sheet) {
if (static_cast<CSSStyleSheet*>(m_sheet.get())->isLoading())
document->removePendingSheet();
m_sheet = 0;
}
// If type is empty or CSS, this is a CSS style sheet.
const AtomicString& type = this->type();
if (type.isEmpty() || (e->isHTMLElement() ? equalIgnoringCase(type, "text/css") : (type == "text/css"))) {
RefPtr<MediaList> mediaList = MediaList::create(media(), e->isHTMLElement());
MediaQueryEvaluator screenEval("screen", true);
MediaQueryEvaluator printEval("print", true);
if (screenEval.eval(mediaList.get()) || printEval.eval(mediaList.get())) {
document->addPendingSheet();
setLoading(true);
m_sheet = CSSStyleSheet::create(e, String(), document->inputEncoding());
m_sheet->parseString(text, !document->inCompatMode());
m_sheet->setMedia(mediaList.get());
m_sheet->setTitle(e->title());
setLoading(false);
}
}
if (m_sheet)
m_sheet->checkLoaded();
}
}
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