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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
* Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
* Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
* Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
* Copyright (C) Research In Motion Limited 2011. All rights reserved.
* Copyright (C) 2012 Google 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 "PageRuleCollector.h"
#include "CSSDefaultStyleSheets.h"
#include "StyleProperties.h"
#include "StyleRule.h"
namespace WebCore {
namespace Style {
static inline bool comparePageRules(const StyleRulePage* r1, const StyleRulePage* r2)
{
return r1->selector()->specificityForPage() < r2->selector()->specificityForPage();
}
bool PageRuleCollector::isLeftPage(int pageIndex) const
{
bool isFirstPageLeft = false;
if (!m_state.rootElementStyle()->isLeftToRightDirection())
isFirstPageLeft = true;
return (pageIndex + (isFirstPageLeft ? 1 : 0)) % 2;
}
bool PageRuleCollector::isFirstPage(int pageIndex) const
{
// FIXME: In case of forced left/right page, page at index 1 (not 0) can be the first page.
return (!pageIndex);
}
String PageRuleCollector::pageName(int /* pageIndex */) const
{
// FIXME: Implement page index to page name mapping.
return emptyString();
}
void PageRuleCollector::matchAllPageRules(int pageIndex)
{
const bool isLeft = isLeftPage(pageIndex);
const bool isFirst = isFirstPage(pageIndex);
const String page = pageName(pageIndex);
matchPageRules(CSSDefaultStyleSheets::defaultPrintStyle, isLeft, isFirst, page);
matchPageRules(m_ruleSets.userStyle(), isLeft, isFirst, page);
// Only consider the global author RuleSet for @page rules, as per the HTML5 spec.
if (m_ruleSets.isAuthorStyleDefined())
matchPageRules(&m_ruleSets.authorStyle(), isLeft, isFirst, page);
}
void PageRuleCollector::matchPageRules(RuleSet* rules, bool isLeftPage, bool isFirstPage, const String& pageName)
{
if (!rules)
return;
Vector<StyleRulePage*> matchedPageRules;
matchPageRulesForList(matchedPageRules, rules->pageRules(), isLeftPage, isFirstPage, pageName);
if (matchedPageRules.isEmpty())
return;
std::stable_sort(matchedPageRules.begin(), matchedPageRules.end(), comparePageRules);
for (unsigned i = 0; i < matchedPageRules.size(); i++)
m_result.authorDeclarations.append({ &matchedPageRules[i]->properties() });
}
static bool checkPageSelectorComponents(const CSSSelector* selector, bool isLeftPage, bool isFirstPage, const String& pageName)
{
for (const CSSSelector* component = selector; component; component = component->tagHistory()) {
if (component->match() == CSSSelector::Tag) {
const AtomString& localName = component->tagQName().localName();
if (localName != starAtom() && localName != pageName)
return false;
} else if (component->match() == CSSSelector::PagePseudoClass) {
CSSSelector::PagePseudoClassType pseudoType = component->pagePseudoClassType();
if ((pseudoType == CSSSelector::PagePseudoClassLeft && !isLeftPage)
|| (pseudoType == CSSSelector::PagePseudoClassRight && isLeftPage)
|| (pseudoType == CSSSelector::PagePseudoClassFirst && !isFirstPage))
{
return false;
}
}
}
return true;
}
void PageRuleCollector::matchPageRulesForList(Vector<StyleRulePage*>& matchedRules, const Vector<StyleRulePage*>& rules, bool isLeftPage, bool isFirstPage, const String& pageName)
{
for (unsigned i = 0; i < rules.size(); ++i) {
StyleRulePage* rule = rules[i];
if (!checkPageSelectorComponents(rule->selector(), isLeftPage, isFirstPage, pageName))
continue;
// If the rule has no properties to apply, then ignore it.
const StyleProperties& properties = rule->properties();
if (properties.isEmpty())
continue;
// Add this rule to our list of matched rules.
matchedRules.append(rule);
}
}
} // namespace Style
} // namespace WebCore