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      1 /*
      2  * Copyright (C) 2013 Google 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 are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "core/animation/EffectInput.h"
     33 
     34 #include "bindings/core/v8/Dictionary.h"
     35 #include "core/animation/AnimationInputHelpers.h"
     36 #include "core/animation/KeyframeEffectModel.h"
     37 #include "core/animation/StringKeyframe.h"
     38 #include "core/css/resolver/StyleResolver.h"
     39 #include "core/dom/Document.h"
     40 #include "core/dom/Element.h"
     41 #include "wtf/NonCopyingSort.h"
     42 
     43 namespace blink {
     44 
     45 PassRefPtrWillBeRawPtr<AnimationEffect> EffectInput::convert(Element* element, const Vector<Dictionary>& keyframeDictionaryVector, ExceptionState& exceptionState)
     46 {
     47     // FIXME: Remove the dependency on element.
     48     if (!element)
     49         return nullptr;
     50 
     51     StyleSheetContents* styleSheetContents = element->document().elementSheet().contents();
     52     StringKeyframeVector keyframes;
     53     double lastOffset = 0;
     54 
     55     for (size_t i = 0; i < keyframeDictionaryVector.size(); ++i) {
     56         RefPtrWillBeRawPtr<StringKeyframe> keyframe = StringKeyframe::create();
     57 
     58         ScriptValue scriptValue;
     59         bool frameHasOffset = DictionaryHelper::get(keyframeDictionaryVector[i], "offset", scriptValue) && !scriptValue.isNull();
     60 
     61         if (frameHasOffset) {
     62             double offset;
     63             DictionaryHelper::get(keyframeDictionaryVector[i], "offset", offset);
     64 
     65             // Keyframes with offsets outside the range [0.0, 1.0] are an error.
     66             if (std::isnan(offset)) {
     67                 exceptionState.throwDOMException(InvalidModificationError, "Non numeric offset provided");
     68             }
     69 
     70             if (offset < 0 || offset > 1) {
     71                 exceptionState.throwDOMException(InvalidModificationError, "Offsets provided outside the range [0, 1]");
     72                 return nullptr;
     73             }
     74 
     75             if (offset < lastOffset) {
     76                 exceptionState.throwDOMException(InvalidModificationError, "Keyframes with specified offsets are not sorted");
     77                 return nullptr;
     78             }
     79 
     80             lastOffset = offset;
     81 
     82             keyframe->setOffset(offset);
     83         }
     84         keyframes.append(keyframe);
     85 
     86         String compositeString;
     87         DictionaryHelper::get(keyframeDictionaryVector[i], "composite", compositeString);
     88         if (compositeString == "add")
     89             keyframe->setComposite(AnimationEffect::CompositeAdd);
     90 
     91         String timingFunctionString;
     92         if (DictionaryHelper::get(keyframeDictionaryVector[i], "easing", timingFunctionString)) {
     93             if (RefPtr<TimingFunction> timingFunction = AnimationInputHelpers::parseTimingFunction(timingFunctionString))
     94                 keyframe->setEasing(timingFunction);
     95         }
     96 
     97         Vector<String> keyframeProperties;
     98         keyframeDictionaryVector[i].getOwnPropertyNames(keyframeProperties);
     99         for (size_t j = 0; j < keyframeProperties.size(); ++j) {
    100             String property = keyframeProperties[j];
    101             CSSPropertyID id = AnimationInputHelpers::keyframeAttributeToCSSPropertyID(property);
    102             if (id == CSSPropertyInvalid)
    103                 continue;
    104             String value;
    105             DictionaryHelper::get(keyframeDictionaryVector[i], property, value);
    106             keyframe->setPropertyValue(id, value, styleSheetContents);
    107         }
    108     }
    109 
    110     RefPtrWillBeRawPtr<StringKeyframeEffectModel> keyframeEffectModel = StringKeyframeEffectModel::create(keyframes);
    111     if (!keyframeEffectModel->isReplaceOnly()) {
    112         exceptionState.throwDOMException(NotSupportedError, "Partial keyframes are not supported.");
    113         return nullptr;
    114     }
    115     keyframeEffectModel->forceConversionsToAnimatableValues(element);
    116 
    117     return keyframeEffectModel;
    118 }
    119 
    120 } // namespace blink
    121