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      1 /*
      2  * (C) 1999-2003 Lars Knoll (knoll (at) kde.org)
      3  * (C) 2002-2003 Dirk Mueller (mueller (at) kde.org)
      4  * Copyright (C) 2002, 2005, 2006, 2008, 2012 Apple Inc. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  */
     21 
     22 #include "config.h"
     23 #include "core/css/CSSPageRule.h"
     24 
     25 #include "core/css/parser/BisonCSSParser.h"
     26 #include "core/css/CSSSelector.h"
     27 #include "core/css/CSSStyleSheet.h"
     28 #include "core/css/PropertySetCSSStyleDeclaration.h"
     29 #include "core/css/StylePropertySet.h"
     30 #include "core/css/StyleRule.h"
     31 #include "wtf/text/StringBuilder.h"
     32 
     33 namespace WebCore {
     34 
     35 CSSPageRule::CSSPageRule(StyleRulePage* pageRule, CSSStyleSheet* parent)
     36     : CSSRule(parent)
     37     , m_pageRule(pageRule)
     38 {
     39 }
     40 
     41 CSSPageRule::~CSSPageRule()
     42 {
     43 #if !ENABLE(OILPAN)
     44     if (m_propertiesCSSOMWrapper)
     45         m_propertiesCSSOMWrapper->clearParentRule();
     46 #endif
     47 }
     48 
     49 CSSStyleDeclaration* CSSPageRule::style() const
     50 {
     51     if (!m_propertiesCSSOMWrapper)
     52         m_propertiesCSSOMWrapper = StyleRuleCSSStyleDeclaration::create(m_pageRule->mutableProperties(), const_cast<CSSPageRule*>(this));
     53     return m_propertiesCSSOMWrapper.get();
     54 }
     55 
     56 String CSSPageRule::selectorText() const
     57 {
     58     StringBuilder text;
     59     text.appendLiteral("@page");
     60     const CSSSelector* selector = m_pageRule->selector();
     61     if (selector) {
     62         String pageSpecification = selector->selectorText();
     63         if (!pageSpecification.isEmpty() && pageSpecification != starAtom) {
     64             text.append(' ');
     65             text.append(pageSpecification);
     66         }
     67     }
     68     return text.toString();
     69 }
     70 
     71 void CSSPageRule::setSelectorText(const String& selectorText)
     72 {
     73     CSSParserContext context(parserContext(), 0);
     74     BisonCSSParser parser(context);
     75     CSSSelectorList selectorList;
     76     parser.parseSelector(selectorText, selectorList);
     77     if (!selectorList.isValid())
     78         return;
     79 
     80     CSSStyleSheet::RuleMutationScope mutationScope(this);
     81 
     82     m_pageRule->wrapperAdoptSelectorList(selectorList);
     83 }
     84 
     85 String CSSPageRule::cssText() const
     86 {
     87     StringBuilder result;
     88     result.append(selectorText());
     89     result.appendLiteral(" { ");
     90     String decls = m_pageRule->properties().asText();
     91     result.append(decls);
     92     if (!decls.isEmpty())
     93         result.append(' ');
     94     result.append('}');
     95     return result.toString();
     96 }
     97 
     98 void CSSPageRule::reattach(StyleRuleBase* rule)
     99 {
    100     ASSERT(rule);
    101     m_pageRule = toStyleRulePage(rule);
    102     if (m_propertiesCSSOMWrapper)
    103         m_propertiesCSSOMWrapper->reattach(m_pageRule->mutableProperties());
    104 }
    105 
    106 void CSSPageRule::trace(Visitor* visitor)
    107 {
    108     visitor->trace(m_pageRule);
    109     visitor->trace(m_propertiesCSSOMWrapper);
    110     CSSRule::trace(visitor);
    111 }
    112 
    113 } // namespace WebCore
    114