graphicslayerca.mm

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    BEGIN_BLOCK_OBJC_EXCEPTIONS

    // add an entry for this animation
    addAnimationEntry(property, index, isTransition, transition);

    String keyPath = propertyIdToString(property);
    String animName = keyPath + "_" + String::number(index);

    CABasicAnimation* basicAnim = [CABasicAnimation animationWithKeyPath:keyPath];
    
    double duration = transition->duration();
    if (duration <= 0)
        duration = cAnimationAlmostZeroDuration;
        
    float repeatCount = transition->iterationCount();
    if (repeatCount == Animation::IterationCountInfinite)
        repeatCount = FLT_MAX;
    else if (transition->direction() == Animation::AnimationDirectionAlternate)
        repeatCount /= 2;
        
    [basicAnim setDuration:duration];
    [basicAnim setRepeatCount:repeatCount];
    [basicAnim setAutoreverses:transition->direction()];
    [basicAnim setRemovedOnCompletion:NO];

    // Note that currently transform is the only property which has animations
    // with an index > 0.
    [basicAnim setAdditive:property == AnimatedPropertyWebkitTransform];
    [basicAnim setFillMode:@"extended"];
#if HAVE_MODERN_QUARTZCORE
    if (NSString* valueFunctionName = getValueFunctionNameForTransformOperation(operationType))
        [basicAnim setValueFunction:[CAValueFunction functionWithName:valueFunctionName]];
#else
    UNUSED_PARAM(operationType);
#endif
    
    // Set the delegate (and property value).
    int prop = isTransition ? property : AnimatedPropertyInvalid;
    [basicAnim setValue:[NSNumber numberWithInt:prop] forKey:WebAnimationCSSPropertyKey];
    [basicAnim setDelegate:m_animationDelegate.get()];

    NSTimeInterval bt = beginTime ? [layer convertTime:currentTimeToMediaTime(beginTime) fromLayer:nil] : 0;
    [basicAnim setBeginTime:bt];
    
    if (fromVal)
        [basicAnim setFromValue:reinterpret_cast<id>(fromVal)];
    if (toVal)
        [basicAnim setToValue:reinterpret_cast<id>(toVal)];

    const TimingFunction* tf = 0;
    if (transition->isTimingFunctionSet())
        tf = &transition->timingFunction();

    CAMediaTimingFunction* timingFunction = getCAMediaTimingFunction(tf ? *tf : TimingFunction());
    [basicAnim setTimingFunction:timingFunction];

    // Send over the animation.
    [layer removeAnimationForKey:animName];
    [layer addAnimation:basicAnim forKey:animName];
    
    END_BLOCK_OBJC_EXCEPTIONS
}

void GraphicsLayerCA::setKeyframeAnimation(AnimatedPropertyID property, TransformOperation::OperationType operationType, short index, void* keys, void* values, void* timingFunctions, 
                                    bool isTransition, const Animation* anim, double beginTime)
{
    PlatformLayer* layer = animatedLayer(property);

    // Add an entry for this animation (which may change beginTime).
    addAnimationEntry(property, index, isTransition, anim);

    String keyPath = propertyIdToString(property);
    String animName = keyPath + "_" + String::number(index);

    BEGIN_BLOCK_OBJC_EXCEPTIONS

    CAKeyframeAnimation* keyframeAnim = [CAKeyframeAnimation animationWithKeyPath:keyPath];

    double duration = anim->duration();
    if (duration <= 0)
        duration = cAnimationAlmostZeroDuration;

    float repeatCount = anim->iterationCount();
    if (repeatCount == Animation::IterationCountInfinite)
        repeatCount = FLT_MAX;
    else if (anim->direction() == Animation::AnimationDirectionAlternate)
        repeatCount /= 2;

    [keyframeAnim setDuration:duration];
    [keyframeAnim setRepeatCount:repeatCount];
    [keyframeAnim setAutoreverses:anim->direction()];
    [keyframeAnim setRemovedOnCompletion:NO];

    // The first animation is non-additive, all the rest are additive.
    // Note that currently transform is the only property which has animations
    // with an index > 0.
    [keyframeAnim setAdditive:(property == AnimatedPropertyWebkitTransform) ? YES : NO];
    [keyframeAnim setFillMode:@"extended"];
#if HAVE_MODERN_QUARTZCORE
    if (NSString* valueFunctionName = getValueFunctionNameForTransformOperation(operationType))
        [keyframeAnim setValueFunction:[CAValueFunction functionWithName:valueFunctionName]];
#else
    UNUSED_PARAM(operationType);
#endif

    [keyframeAnim setKeyTimes:reinterpret_cast<id>(keys)];
    [keyframeAnim setValues:reinterpret_cast<id>(values)];
    
    // Set the delegate (and property value).
    int prop = isTransition ? property : AnimatedPropertyInvalid;
    [keyframeAnim setValue:[NSNumber numberWithInt: prop] forKey:WebAnimationCSSPropertyKey];
    [keyframeAnim setDelegate:m_animationDelegate.get()];

    NSTimeInterval bt = beginTime ? [layer convertTime:currentTimeToMediaTime(beginTime) fromLayer:nil] : 0;
    [keyframeAnim setBeginTime:bt];
    
    // Set the timing functions, if any.
    if (timingFunctions != nil)
        [keyframeAnim setTimingFunctions:(id)timingFunctions];
        
    // Send over the animation.
    [layer removeAnimationForKey:animName];
    [layer addAnimation:keyframeAnim forKey:animName];
        
    END_BLOCK_OBJC_EXCEPTIONS
}

void GraphicsLayerCA::suspendAnimations()
{
    double t = currentTimeToMediaTime(currentTime());
    [primaryLayer() setSpeed:0];
    [primaryLayer() setTimeOffset:t];
}

void GraphicsLayerCA::resumeAnimations()
{
    [primaryLayer() setSpeed:1];
    [primaryLayer() setTimeOffset:0];
}

void GraphicsLayerCA::removeAnimation(int index, bool reset)
{
    ASSERT(index >= 0);

    AnimatedPropertyID property = m_animations[index].property();
    
    // Set the value of the property and remove the animation.
    String keyPath = propertyIdToString(property);
    String animName = keyPath + "_" + String::number(m_animations[index].index());
    CALayer* layer = animatedLayer(property);

    BEGIN_BLOCK_OBJC_EXCEPTIONS

    // If we are not resetting, it means we are pausing. So we need to get the current presentation
    // value into the property before we remove the animation.
    if (!reset) {
        // Put the current value into the property.
        CALayer* presLayer = [layer presentationLayer];
        if (presLayer)
            [layer setValue:[presLayer valueForKeyPath:keyPath] forKeyPath:keyPath];

        // Make sure the saved values accurately reflect the value in the layer.
        id val = [layer valueForKeyPath:keyPath];
        switch (property) {
            case AnimatedPropertyWebkitTransform:
                // FIXME: needs comment explaining why the m_transform is not obtained from the layer
                break;
            case AnimatedPropertyBackgroundColor:
                m_backgroundColor = Color(reinterpret_cast<CGColorRef>(val));
                break;
            case AnimatedPropertyOpacity:
                m_opacity = [val floatValue];
                break;
            case AnimatedPropertyInvalid:
                ASSERT_NOT_REACHED();
                break;
        }
    }
    
    // If we have reached the end of an animation, we don't want to actually remove the 
    // animation from the CALayer. At some point we will be setting the property to its
    // unanimated value and at that point we will remove the animation. That will avoid
    // any flashing between the time the animation is removed and the property is set.
    if (!reset || m_animations[index].isTransition())
        [layer removeAnimationForKey:animName];

    END_BLOCK_OBJC_EXCEPTIONS

    // Remove the animation entry.
    m_animations.remove(index);
}

PlatformLayer* GraphicsLayerCA::hostLayerForSublayers() const
{
    return m_transformLayer ? m_transformLayer.get() : m_layer.get();
}

PlatformLayer* GraphicsLayerCA::layerForSuperlayer() const
{
    if (m_transformLayer)
        return m_transformLayer.get();

    return m_layer.get();
}

PlatformLayer* GraphicsLayerCA::platformLayer() const
{
    return primaryLayer();
}

#ifndef NDEBUG
void GraphicsLayerCA::setDebugBackgroundColor(const Color& color)
{
    BEGIN_BLOCK_OBJC_EXCEPTIONS
    
    if (color.isValid())
        setLayerBackgroundColor(m_layer.get(), color);
    else
        clearLayerBackgroundColor(m_layer.get());
    
    END_BLOCK_OBJC_EXCEPTIONS
}

void GraphicsLayerCA::setDebugBorder(const Color& color, float borderWidth)
{
    BEGIN_BLOCK_OBJC_EXCEPTIONS
    
    if (color.isValid()) {
        setLayerBorderColor(m_layer.get(), color);
        [m_layer.get() setBorderWidth:borderWidth];
    } else {
        clearBorderColor(m_layer.get());
        [m_layer.get() setBorderWidth:0];
    }
    
    END_BLOCK_OBJC_EXCEPTIONS
}

void GraphicsLayerCA::setZPosition(float position)
{
    GraphicsLayer::setZPosition(position);
    
    BEGIN_BLOCK_OBJC_EXCEPTIONS
    [primaryLayer() setZPosition:position];
    END_BLOCK_OBJC_EXCEPTIONS
}
#endif

bool GraphicsLayerCA::requiresTiledLayer(const FloatSize& size) const
{
    if (!m_drawsContent)
        return false;

    // FIXME: catch zero-size height or width here (or earlier)?
    return size.width() > cMaxPixelDimension || size.height() > cMaxPixelDimension;
}

void GraphicsLayerCA::swapFromOrToTiledLayer(bool userTiledLayer)
{
    if (userTiledLayer == m_usingTiledLayer)
        return;

    CGSize tileSize = CGSizeMake(cTiledLayerTileSize, cTiledLayerTileSize);

    BEGIN_BLOCK_OBJC_EXCEPTIONS
    
    RetainPtr<CALayer> oldLayer = m_layer.get();
    
    Class layerClass = userTiledLayer ? [WebTiledLayer self] : [WebLayer self];
    m_layer.adoptNS([[layerClass alloc] init]);

    if (userTiledLayer) {
        WebTiledLayer* tiledLayer = (WebTiledLayer*)m_layer.get();
        [tiledLayer setTileSize:tileSize];
        [tiledLayer setLevelsOfDetail:1];
        [tiledLayer setLevelsOfDetailBias:0];

        if (GraphicsLayer::graphicsContextsFlipped())
            [tiledLayer setContentsGravity:@"bottomLeft"];
        else
            [tiledLayer setContentsGravity:@"topLeft"];
    }
    
    [m_layer.get() setLayerOwner:this];
    [m_layer.get() setSublayers:[oldLayer.get() sublayers]];
    
    [[oldLayer.get() superlayer] replaceSublayer:oldLayer.get() with:m_layer.get()];
    
    [m_layer.get() setBounds:[oldLayer.get() bounds]];
    [m_layer.get() setPosition:[oldLayer.get() position]];
    [m_layer.get() setAnchorPoint:[oldLayer.get() anchorPoint]];
    [m_layer.get() setOpaque:[oldLayer.get() isOpaque]];
    [m_layer.get() setOpacity:[oldLayer.get() opacity]];
    [m_layer.get() setTransform:[oldLayer.get() transform]];
    [m_layer.get() setSublayerTransform:[oldLayer.get() sublayerTransform]];
    [m_layer.get() setDoubleSided:[oldLayer.get() isDoubleSided]];
#ifndef NDEBUG
    [m_layer.get() setZPosition:[oldLayer.get() zPosition]];
#endif
    
#ifndef NDEBUG
    String name = String::format("CALayer(%p) GraphicsLayer(%p) ", m_layer.get(), this) + m_name;
    [m_layer.get() setName:name];
#endif

    // move over animations
    moveAnimation(AnimatedPropertyWebkitTransform, oldLayer.get(), m_layer.get());
    moveAnimation(AnimatedPropertyOpacity, oldLayer.get(), m_layer.get());
    moveAnimation(AnimatedPropertyBackgroundColor, oldLayer.get(), m_layer.get());
    
    // need to tell new layer to draw itself
    setNeedsDisplay();
    
    END_BLOCK_OBJC_EXCEPTIONS
    
    m_usingTiledLayer = userTiledLayer;
    
#ifndef NDEBUG
    updateDebugIndicators();
#endif
}

void GraphicsLayerCA::setHasContentsLayer(bool hasLayer)
{
    BEGIN_BLOCK_OBJC_EXCEPTIONS

    if (hasLayer && !m_contentsLayer) {
        // create the inner layer
        WebLayer* contentsLayer = [WebLayer layer];
#ifndef NDEBUG
        [contentsLayer setName:@"Contents Layer"];
#endif
        setContentsLayer(contentsLayer);

    } else if (!hasLayer && m_contentsLayer)
        setContentsLayer(0);

    END_BLOCK_OBJC_EXCEPTIONS
}

void GraphicsLayerCA::setContentsLayer(WebLayer* contentsLayer)
{
    if (contentsLayer == m_contentsLayer)
        return;

    BEGIN_BLOCK_OBJC_EXCEPTIONS

    if (m_contentsLayer) {
        [m_contentsLayer.get() removeFromSuperlayer];
        m_contentsLayer = 0;
    }
    
    if (contentsLayer) {
        // Turn off implicit animations on the inner layer.
        [contentsLayer setStyle:[NSDictionary dictionaryWithObject:nullActionsDictionary() forKey:@"actions"]];

        m_contentsLayer.adoptNS([contentsLayer retain]);
        [m_contentsLayer.get() setAnchorPoint:CGPointZero];
        [m_layer.get() addSublayer:m_contentsLayer.get()];

        updateContentsRect();

        // Set contents to nil if the layer does not draw its own content.
        if (m_client && !drawsContent())
            [m_layer.get() setContents:nil];

#ifndef NDEBUG
        if (showDebugBorders()) {
            setLayerBorderColor(m_contentsLayer.get(), Color(0, 0, 128, 180));
            [m_contentsLayer.get() setBorderWidth:1.0f];
        }
#endif
    }
#ifndef NDEBUG
    updateDebugIndicators();
#endif

    END_BLOCK_OBJC_EXCEPTIONS
}

} // namespace WebCore


#endif // USE(ACCELERATED_COMPOSITING)