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      1 /*
      2  * Copyright (C) 2007, 2008, 2012 Apple Inc. 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  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "core/css/CSSKeyframeRule.h"
     28 
     29 #include "core/css/CSSKeyframesRule.h"
     30 #include "core/css/PropertySetCSSStyleDeclaration.h"
     31 #include "core/css/StylePropertySet.h"
     32 #include "core/css/parser/CSSParser.h"
     33 #include "core/frame/UseCounter.h"
     34 #include "wtf/text/StringBuilder.h"
     35 
     36 namespace blink {
     37 
     38 StyleKeyframe::StyleKeyframe()
     39 {
     40 }
     41 
     42 StyleKeyframe::~StyleKeyframe()
     43 {
     44 }
     45 
     46 String StyleKeyframe::keyText() const
     47 {
     48     if (m_keyText.isNull()) {
     49         // Keys are always set when these objects are created.
     50         ASSERT(m_keys && !m_keys->isEmpty());
     51         StringBuilder keyText;
     52         for (unsigned i = 0; i < m_keys->size(); ++i) {
     53             if (i)
     54                 keyText.append(',');
     55             keyText.appendNumber(m_keys->at(i) * 100);
     56             keyText.append('%');
     57         }
     58         m_keyText = keyText.toString();
     59     }
     60     ASSERT(!m_keyText.isNull());
     61     return m_keyText;
     62 }
     63 
     64 void StyleKeyframe::setKeyText(const String& keyText)
     65 {
     66     // FIXME: Should we trim whitespace?
     67     // FIXME: Should we leave keyText unchanged when attempting to set to an
     68     // invalid string?
     69     ASSERT(!keyText.isNull());
     70     m_keyText = keyText;
     71     m_keys.clear();
     72 }
     73 
     74 const Vector<double>& StyleKeyframe::keys() const
     75 {
     76     if (!m_keys) {
     77         // Keys can only be cleared by setting the key text from JavaScript
     78         // and this can never be null.
     79         ASSERT(!m_keyText.isNull());
     80         m_keys = CSSParser::parseKeyframeKeyList(m_keyText);
     81     }
     82     // If an invalid key string was set, m_keys may be empty.
     83     ASSERT(m_keys);
     84     return *m_keys;
     85 }
     86 
     87 void StyleKeyframe::setKeys(PassOwnPtr<Vector<double> > keys)
     88 {
     89     ASSERT(keys && !keys->isEmpty());
     90     m_keys = keys;
     91     m_keyText = String();
     92     ASSERT(m_keyText.isNull());
     93 }
     94 
     95 MutableStylePropertySet& StyleKeyframe::mutableProperties()
     96 {
     97     if (!m_properties->isMutable())
     98         m_properties = m_properties->mutableCopy();
     99     return *toMutableStylePropertySet(m_properties.get());
    100 }
    101 
    102 void StyleKeyframe::setProperties(PassRefPtrWillBeRawPtr<StylePropertySet> properties)
    103 {
    104     ASSERT(properties);
    105     m_properties = properties;
    106 }
    107 
    108 String StyleKeyframe::cssText() const
    109 {
    110     StringBuilder result;
    111     result.append(keyText());
    112     result.appendLiteral(" { ");
    113     String decls = m_properties->asText();
    114     result.append(decls);
    115     if (!decls.isEmpty())
    116         result.append(' ');
    117     result.append('}');
    118     return result.toString();
    119 }
    120 
    121 PassOwnPtr<Vector<double> > StyleKeyframe::createKeyList(CSSParserValueList* keys)
    122 {
    123     OwnPtr<Vector<double> > keyVector = adoptPtr(new Vector<double>(keys->size()));
    124     for (unsigned i = 0; i < keys->size(); ++i) {
    125         ASSERT(keys->valueAt(i)->unit == blink::CSSPrimitiveValue::CSS_NUMBER);
    126         double key = keys->valueAt(i)->fValue;
    127         if (key < 0 || key > 100) {
    128             // As per http://www.w3.org/TR/css3-animations/#keyframes,
    129             // "If a keyframe selector specifies negative percentage values
    130             // or values higher than 100%, then the keyframe will be ignored."
    131             keyVector->clear();
    132             break;
    133         }
    134         keyVector->at(i) = key / 100;
    135     }
    136     return keyVector.release();
    137 }
    138 
    139 void StyleKeyframe::trace(Visitor* visitor)
    140 {
    141     visitor->trace(m_properties);
    142 }
    143 
    144 CSSKeyframeRule::CSSKeyframeRule(StyleKeyframe* keyframe, CSSKeyframesRule* parent)
    145     : CSSRule(0)
    146     , m_keyframe(keyframe)
    147 {
    148     setParentRule(parent);
    149 }
    150 
    151 CSSKeyframeRule::~CSSKeyframeRule()
    152 {
    153 #if !ENABLE(OILPAN)
    154     if (m_propertiesCSSOMWrapper)
    155         m_propertiesCSSOMWrapper->clearParentRule();
    156 #endif
    157 }
    158 
    159 CSSStyleDeclaration* CSSKeyframeRule::style() const
    160 {
    161     if (!m_propertiesCSSOMWrapper)
    162         m_propertiesCSSOMWrapper = StyleRuleCSSStyleDeclaration::create(m_keyframe->mutableProperties(), const_cast<CSSKeyframeRule*>(this));
    163     return m_propertiesCSSOMWrapper.get();
    164 }
    165 
    166 void CSSKeyframeRule::reattach(StyleRuleBase*)
    167 {
    168     // No need to reattach, the underlying data is shareable on mutation.
    169     ASSERT_NOT_REACHED();
    170 }
    171 
    172 void CSSKeyframeRule::trace(Visitor* visitor)
    173 {
    174     visitor->trace(m_keyframe);
    175     visitor->trace(m_propertiesCSSOMWrapper);
    176     CSSRule::trace(visitor);
    177 }
    178 
    179 } // namespace blink
    180