WebCore/css/WebKitCSSKeyframeRule.cpp

   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 "WebKitCSSKeyframeRule.h"
  28
  29 #include "CSSMutableStyleDeclaration.h"
  30
  31 namespace WebCore {
  32
  33 WebKitCSSKeyframeRule::WebKitCSSKeyframeRule(CSSStyleSheet* parent)
  34     : CSSRule(parent)
  35 {
  36 }
  37
  38 WebKitCSSKeyframeRule::~WebKitCSSKeyframeRule()
  39 {
  40     if (m_style)
  41         m_style->setParent(0);
  42 }
  43
  44 String WebKitCSSKeyframeRule::cssText() const
  45 {
  46     String result = m_key;
  47
  48     result += " { ";
  49     result += m_style->cssText();
  50     result += "}";
  51
  52     return result;
  53 }
  54
  55 bool WebKitCSSKeyframeRule::parseString(const String& /*string*/, bool /*strict*/)
  56 {
  57     // FIXME
  58     return false;
  59 }
  60
  61 void WebKitCSSKeyframeRule::setDeclaration(PassRefPtr<CSSMutableStyleDeclaration> style)
  62 {
  63     m_style = style;
  64     m_style->setParent(parent());
  65 }
  66
  67 /* static */
  68 void WebKitCSSKeyframeRule::parseKeyString(const String& s, Vector<float>& keys)
  69 {
  70     keys.clear();
  71     Vector<String> strings;
  72     s.split(',', strings);
  73
  74     for (size_t i = 0; i < strings.size(); ++i) {
  75         float key = -1;
  76         String cur = strings[i].stripWhiteSpace();
  77
  78         // For now the syntax MUST be 'xxx%' or 'from' or 'to', where xxx is a legal floating point number
  79         if (cur == "from")
  80             key = 0;
  81         else if (cur == "to")
  82             key = 1;
  83         else if (cur.endsWith("%")) {
  84             float k = cur.substring(0, cur.length() - 1).toFloat();
  85             if (k >= 0 && k <= 100)
  86                 key = k/100;
  87         }
  88
  89         if (key < 0) {
  90             keys.clear();
  91             return;
  92         }
  93         else
  94             keys.append(key);
  95     }
  96 }
  97
  98 } // namespace WebCore