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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/CSSParser.h"
     31 #include "core/css/PropertySetCSSStyleDeclaration.h"
     32 #include "core/css/StylePropertySet.h"
     33 #include "wtf/text/StringBuilder.h"
     34 
     35 namespace WebCore {
     36 
     37 StyleKeyframe::StyleKeyframe()
     38 {
     39 }
     40 
     41 StyleKeyframe::~StyleKeyframe()
     42 {
     43 }
     44 
     45 String StyleKeyframe::keyText() const
     46 {
     47     if (m_keyText.isNull()) {
     48         // Keys are always set when these objects are created.
     49         ASSERT(m_keys && !m_keys->isEmpty());
     50         StringBuilder keyText;
     51         for (unsigned i = 0; i < m_keys->size(); ++i) {
     52             if (i)
     53                 keyText.append(',');
     54             keyText.append(String::number(m_keys->at(i) * 100));
     55             keyText.append('%');
     56         }
     57         m_keyText = keyText.toString();
     58     }
     59     ASSERT(!m_keyText.isNull());
     60     return m_keyText;
     61 }
     62 
     63 void StyleKeyframe::setKeyText(const String& keyText)
     64 {
     65     // FIXME: Should we trim whitespace?
     66     // FIXME: Should we leave keyText unchanged when attempting to set to an
     67     // invalid string?
     68     ASSERT(!keyText.isNull());
     69     m_keyText = keyText;
     70     m_keys.clear();
     71 }
     72 
     73 const Vector<double>& StyleKeyframe::keys() const
     74 {
     75     if (!m_keys) {
     76         // Keys can only be cleared by setting the key text from JavaScript
     77         // and this can never be null.
     78         ASSERT(!m_keyText.isNull());
     79         m_keys = CSSParser(HTMLStandardMode).parseKeyframeKeyList(m_keyText);
     80     }
     81     // If an invalid key string was set, m_keys may be empty.
     82     ASSERT(m_keys);
     83     return *m_keys;
     84 }
     85 
     86 void StyleKeyframe::setKeys(PassOwnPtr<Vector<double> > keys)
     87 {
     88     ASSERT(keys && !keys->isEmpty());
     89     m_keys = keys;
     90     m_keyText = String();
     91     ASSERT(m_keyText.isNull());
     92 }
     93 
     94 MutableStylePropertySet* StyleKeyframe::mutableProperties()
     95 {
     96     if (!m_properties->isMutable())
     97         m_properties = m_properties->mutableCopy();
     98     return toMutableStylePropertySet(m_properties);
     99 }
    100 
    101 void StyleKeyframe::setProperties(PassRefPtr<StylePropertySet> properties)
    102 {
    103     m_properties = properties;
    104 }
    105 
    106 String StyleKeyframe::cssText() const
    107 {
    108     StringBuilder result;
    109     result.append(keyText());
    110     result.appendLiteral(" { ");
    111     String decls = m_properties->asText();
    112     result.append(decls);
    113     if (!decls.isEmpty())
    114         result.append(' ');
    115     result.append('}');
    116     return result.toString();
    117 }
    118 
    119 PassOwnPtr<Vector<double> > StyleKeyframe::createKeyList(CSSParserValueList* keys)
    120 {
    121     OwnPtr<Vector<double> > keyVector = adoptPtr(new Vector<double>(keys->size()));
    122     for (unsigned i = 0; i < keys->size(); ++i) {
    123         ASSERT(keys->valueAt(i)->unit == WebCore::CSSPrimitiveValue::CSS_NUMBER);
    124         double key = keys->valueAt(i)->fValue;
    125         if (key < 0 || key > 100) {
    126             // As per http://www.w3.org/TR/css3-animations/#keyframes,
    127             // "If a keyframe selector specifies negative percentage values
    128             // or values higher than 100%, then the keyframe will be ignored."
    129             keyVector->clear();
    130             break;
    131         }
    132         keyVector->at(i) = key / 100;
    133     }
    134     return keyVector.release();
    135 }
    136 
    137 
    138 CSSKeyframeRule::CSSKeyframeRule(StyleKeyframe* keyframe, CSSKeyframesRule* parent)
    139     : CSSRule(0)
    140     , m_keyframe(keyframe)
    141 {
    142     setParentRule(parent);
    143 }
    144 
    145 CSSKeyframeRule::~CSSKeyframeRule()
    146 {
    147     if (m_propertiesCSSOMWrapper)
    148         m_propertiesCSSOMWrapper->clearParentRule();
    149 }
    150 
    151 CSSStyleDeclaration* CSSKeyframeRule::style() const
    152 {
    153     if (!m_propertiesCSSOMWrapper)
    154         m_propertiesCSSOMWrapper = StyleRuleCSSStyleDeclaration::create(m_keyframe->mutableProperties(), const_cast<CSSKeyframeRule*>(this));
    155     return m_propertiesCSSOMWrapper.get();
    156 }
    157 
    158 void CSSKeyframeRule::reattach(StyleRuleBase*)
    159 {
    160     // No need to reattach, the underlying data is shareable on mutation.
    161     ASSERT_NOT_REACHED();
    162 }
    163 
    164 } // namespace WebCore
    165