third_party/WebKit/Source/core/animation/AnimationInputHelpers.cpp

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "config.h"
   6 #include "core/animation/AnimationInputHelpers.h"
   7
   8 #include "core/css/CSSValueList.h"
   9 #include "core/css/parser/CSSParser.h"
  10 #include "core/css/resolver/CSSToStyleMap.h"
  11 #include "wtf/text/StringBuilder.h"
  12
  13 namespace blink {
  14
  15 CSSPropertyID AnimationInputHelpers::keyframeAttributeToCSSPropertyID(const String& propertyName)
  16 {
  17     // Disallow prefixed properties.
  18     if (propertyName[0] == '-' || isASCIIUpper(propertyName[0]))
  19         return CSSPropertyInvalid;
  20     if (propertyName == "cssFloat")
  21         return CSSPropertyFloat;
  22     StringBuilder builder;
  23     for (size_t i = 0; i < propertyName.length(); ++i) {
  24         if (isASCIIUpper(propertyName[i]))
  25             builder.append('-');
  26         builder.append(propertyName[i]);
  27     }
  28     return cssPropertyID(builder.toString());
  29 }
  30
  31 PassRefPtr<TimingFunction> AnimationInputHelpers::parseTimingFunction(const String& string)
  32 {
  33     if (string.isEmpty())
  34         return nullptr;
  35
  36     RefPtrWillBeRawPtr<CSSValue> value = CSSParser::parseSingleValue(CSSPropertyTransitionTimingFunction, string);
  37     if (!value || !value->isValueList()) {
  38         ASSERT(!value || value->isCSSWideKeyword());
  39         return nullptr;
  40     }
  41     CSSValueList* valueList = toCSSValueList(value.get());
  42     if (valueList->length() > 1)
  43         return nullptr;
  44     return CSSToStyleMap::mapAnimationTimingFunction(valueList->item(0), true);
  45 }
  46
  47 } // namespace blink