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      1 /*
      2  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1. Redistributions of source code must retain the above
      9  *    copyright notice, this list of conditions and the following
     10  *    disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above
     12  *    copyright notice, this list of conditions and the following
     13  *    disclaimer in the documentation and/or other materials
     14  *    provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
     17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
     20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
     21  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     22  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     23  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
     25  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
     26  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  */
     29 
     30 #include "config.h"
     31 #include "core/css/CSSFilterRule.h"
     32 
     33 #include "core/css/PropertySetCSSStyleDeclaration.h"
     34 #include "core/css/StylePropertySet.h"
     35 #include "core/css/StyleRule.h"
     36 #include "wtf/text/StringBuilder.h"
     37 
     38 namespace blink {
     39 
     40 CSSFilterRule::CSSFilterRule(StyleRuleFilter* filterRule, CSSStyleSheet* parent)
     41     : CSSRule(parent)
     42     , m_filterRule(filterRule)
     43 {
     44 }
     45 
     46 CSSFilterRule::~CSSFilterRule()
     47 {
     48 #if !ENABLE(OILPAN)
     49     if (m_propertiesCSSOMWrapper)
     50         m_propertiesCSSOMWrapper->clearParentRule();
     51 #endif
     52 }
     53 
     54 CSSStyleDeclaration* CSSFilterRule::style() const
     55 {
     56     if (!m_propertiesCSSOMWrapper)
     57         m_propertiesCSSOMWrapper = StyleRuleCSSStyleDeclaration::create(m_filterRule->mutableProperties(), const_cast<CSSFilterRule*>(this));
     58     return m_propertiesCSSOMWrapper.get();
     59 }
     60 
     61 String CSSFilterRule::cssText() const
     62 {
     63     StringBuilder result;
     64     result.appendLiteral("@-webkit-filter ");
     65 
     66     String filterName = m_filterRule->filterName();
     67     result.append(filterName);
     68     result.appendLiteral(" { ");
     69 
     70     String descs = m_filterRule->properties().asText();
     71     result.append(descs);
     72     if (!descs.isEmpty())
     73         result.append(' ');
     74     result.append('}');
     75 
     76     return result.toString();
     77 }
     78 
     79 void CSSFilterRule::reattach(StyleRuleBase* rule)
     80 {
     81     ASSERT(rule);
     82     m_filterRule = toStyleRuleFilter(rule);
     83     if (m_propertiesCSSOMWrapper)
     84         m_propertiesCSSOMWrapper->reattach(m_filterRule->mutableProperties());
     85 }
     86 
     87 void CSSFilterRule::trace(Visitor* visitor)
     88 {
     89     visitor->trace(m_filterRule);
     90     visitor->trace(m_propertiesCSSOMWrapper);
     91     CSSRule::trace(visitor);
     92 }
     93 
     94 } // namespace blink
     95 
     96