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