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      1 /*
      2  * Copyright (C) 2007, 2008 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 "WebKitCSSKeyframesRule.h"
     28 
     29 #include "CSSMutableStyleDeclaration.h"
     30 #include "CSSParser.h"
     31 #include "CSSRuleList.h"
     32 #include "StyleSheet.h"
     33 #include "WebKitCSSKeyframeRule.h"
     34 
     35 namespace WebCore {
     36 
     37 WebKitCSSKeyframesRule::WebKitCSSKeyframesRule(CSSStyleSheet* parent)
     38     : CSSRule(parent)
     39     , m_lstCSSRules(CSSRuleList::create())
     40 {
     41 }
     42 
     43 WebKitCSSKeyframesRule::~WebKitCSSKeyframesRule()
     44 {
     45     int length = m_lstCSSRules->length();
     46     if (length == 0)
     47         return;
     48 
     49     for (int i = 0; i < length; i++) {
     50         if (m_lstCSSRules->item(i)->isKeyframeRule()) {
     51             if (CSSMutableStyleDeclaration* style = static_cast<WebKitCSSKeyframeRule*>(m_lstCSSRules->item(i))->style())
     52                 style->setParent(0);
     53         }
     54         m_lstCSSRules->item(i)->setParent(0);
     55     }
     56 }
     57 
     58 String WebKitCSSKeyframesRule::name() const
     59 {
     60     return m_name;
     61 }
     62 
     63 void WebKitCSSKeyframesRule::setName(const String& name)
     64 {
     65     m_name = name;
     66 
     67     // Since the name is used in the keyframe map list in CSSStyleSelector, we need
     68     // to recompute the style sheet to get the updated name.
     69     stylesheet()->styleSheetChanged();
     70 }
     71 
     72 unsigned WebKitCSSKeyframesRule::length() const
     73 {
     74     return m_lstCSSRules.get()->length();
     75 }
     76 
     77 WebKitCSSKeyframeRule* WebKitCSSKeyframesRule::item(unsigned index)
     78 {
     79     CSSRule* rule = m_lstCSSRules.get()->item(index);
     80     return (rule && rule->isKeyframeRule()) ? static_cast<WebKitCSSKeyframeRule*>(rule) : 0;
     81 }
     82 
     83 const WebKitCSSKeyframeRule* WebKitCSSKeyframesRule::item(unsigned index) const
     84 {
     85     CSSRule* rule = m_lstCSSRules.get()->item(index);
     86     return (rule && rule->isKeyframeRule()) ? static_cast<const WebKitCSSKeyframeRule*>(rule) : 0;
     87 }
     88 
     89 void WebKitCSSKeyframesRule::append(WebKitCSSKeyframeRule* rule)
     90 {
     91     if (!rule)
     92         return;
     93 
     94     m_lstCSSRules->append(rule);
     95     rule->setParent(this);
     96 
     97     if (CSSMutableStyleDeclaration* style = rule->style())
     98         style->setParent(this);
     99 }
    100 
    101 void WebKitCSSKeyframesRule::insertRule(const String& rule)
    102 {
    103     CSSParser p(useStrictParsing());
    104     RefPtr<CSSRule> newRule = p.parseKeyframeRule(parentStyleSheet(), rule);
    105     if (newRule.get() && newRule.get()->isKeyframeRule())
    106         append(static_cast<WebKitCSSKeyframeRule*>(newRule.get()));
    107 }
    108 
    109 void WebKitCSSKeyframesRule::deleteRule(const String& s)
    110 {
    111     int i = findRuleIndex(s);
    112     if (i >= 0)
    113         m_lstCSSRules.get()->deleteRule(i);
    114 }
    115 
    116 WebKitCSSKeyframeRule* WebKitCSSKeyframesRule::findRule(const String& s)
    117 {
    118     int i = findRuleIndex(s);
    119     return (i >= 0) ? item(i) : 0;
    120 }
    121 
    122 int WebKitCSSKeyframesRule::findRuleIndex(const String& key) const
    123 {
    124     String percentageString;
    125     if (equalIgnoringCase(key, "from"))
    126         percentageString = "0%";
    127     else if (equalIgnoringCase(key, "to"))
    128         percentageString = "100%";
    129     else
    130         percentageString = key;
    131 
    132     for (unsigned i = 0; i < length(); ++i) {
    133         if (item(i)->keyText() == percentageString)
    134             return i;
    135     }
    136 
    137     return -1;
    138 }
    139 
    140 String WebKitCSSKeyframesRule::cssText() const
    141 {
    142     String result = "@-webkit-keyframes ";
    143     result += m_name;
    144     result += " { \n";
    145 
    146     if (m_lstCSSRules) {
    147         unsigned len = m_lstCSSRules->length();
    148         for (unsigned i = 0; i < len; i++) {
    149             result += "  ";
    150             result += m_lstCSSRules->item(i)->cssText();
    151             result += "\n";
    152         }
    153     }
    154 
    155     result += "}";
    156     return result;
    157 }
    158 
    159 } // namespace WebCore
    160