Web Animations API: Refactor IDL input conversion out of Animation

Source/core/animation/EffectInput.cpp

+/*
+ * Copyright (C) 2013 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
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+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "core/animation/EffectInput.h"
+
+#include "bindings/v8/Dictionary.h"
+#include "core/animation/AnimationHelpers.h"
+#include "core/animation/css/CSSAnimations.h"
+#include "core/css/parser/BisonCSSParser.h"
+#include "core/css/resolver/StyleResolver.h"
+#include "core/dom/Element.h"
+
+namespace WebCore {
+
+static bool checkDocumentAndRenderer(Element* element)
+{
+    if (!element->inActiveDocument())
+        return false;
+    element->document().updateStyleIfNeeded();
+    return element->renderer();
+}
+
+PassRefPtrWillBeRawPtr<AnimationEffect> EffectInput::convert(Element* element, const Vector<Dictionary>& keyframeDictionaryVector, bool unsafe)
+{
+    // FIXME: This test will not be neccessary once resolution of keyframe values occurs at
+    // animation application time.
+    if (!unsafe && !checkDocumentAndRenderer(element))
+        return nullptr;
+
+    // FIXME: Move this code into KeyframeEffectModel, it will be used by the IDL constructor for that class.
+    KeyframeEffectModel::KeyframeVector keyframes;
+    Vector<RefPtr<MutableStylePropertySet> > propertySetVector;
+
+    for (size_t i = 0; i < keyframeDictionaryVector.size(); ++i) {
+        RefPtr<MutableStylePropertySet> propertySet = MutableStylePropertySet::create();
+        propertySetVector.append(propertySet);
+
+        RefPtrWillBeRawPtr<Keyframe> keyframe = Keyframe::create();
+        keyframes.append(keyframe);
+
+        double offset;
+        if (keyframeDictionaryVector[i].get("offset", offset))
+            keyframe->setOffset(offset);
+
+        String compositeString;
+        keyframeDictionaryVector[i].get("composite", compositeString);
+        if (compositeString == "add")
+            keyframe->setComposite(AnimationEffect::CompositeAdd);
+
+        String timingFunctionString;
+        if (keyframeDictionaryVector[i].get("easing", timingFunctionString)) {
+            RefPtrWillBeRawPtr<CSSValue> timingFunctionValue = BisonCSSParser::parseAnimationTimingFunctionValue(timingFunctionString);
+            if (timingFunctionValue)
+                keyframe->setEasing(CSSToStyleMap::animationTimingFunction(timingFunctionValue.get(), false));
+        }
+
+        Vector<String> keyframeProperties;
+        keyframeDictionaryVector[i].getOwnPropertyNames(keyframeProperties);
+
+        for (size_t j = 0; j < keyframeProperties.size(); ++j) {
+            String property = keyframeProperties[j];
+            CSSPropertyID id = camelCaseCSSPropertyNameToID(property);
+
+            // FIXME: There is no way to store invalid properties or invalid values
+            // in a Keyframe object, so for now I just skip over them. Eventually we
+            // will need to support getFrames(), which should return exactly the
+            // keyframes that were input through the API. We will add a layer to wrap
+            // KeyframeEffectModel, store input keyframes and implement getFrames.
+            if (id == CSSPropertyInvalid || !CSSAnimations::isAnimatableProperty(id))
+                continue;
+
+            String value;
+            keyframeDictionaryVector[i].get(property, value);
+            propertySet->setProperty(id, value);
+        }
+    }
+
+    // FIXME: Replace this with code that just parses, when that code is available.
+    return StyleResolver::createKeyframeEffectModel(*element, propertySetVector, keyframes);
+}
+
+} // namespace WebCore