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Bug 785333 - Add ContainerLayer::RepositionChild. r=bas

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Add a function that can be used to quickly reposition a layer child, rather
than forcing removal/insertion and the extra work that can involve.
This commit is contained in:
Chris Lord
2012-08-29 11:52:55 +01:00
parent 6e831e4522
commit 127a434e75
15 changed files with 361 additions and 4 deletions
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19
gfx/layers/basic/BasicContainerLayer.cpp
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@@ -77,6 +77,7 @@ public:
virtual void InsertAfter(Layer* aChild, Layer* aAfter);
virtual void RemoveChild(Layer* aChild);
virtual void RepositionChild(Layer* aChild, Layer* aAfter);
virtual Layer* AsLayer() { return this; }
virtual ShadowableLayer* AsShadowableLayer() { return this; }
@@ -117,12 +118,28 @@ BasicShadowableContainerLayer::RemoveChild(Layer* aChild)
BasicContainerLayer::RemoveChild(aChild);
}
void
BasicShadowableContainerLayer::RepositionChild(Layer* aChild, Layer* aAfter)
{
if (HasShadow() && ShouldShadow(aChild)) {
while (aAfter && !ShouldShadow(aAfter)) {
aAfter = aAfter->GetPrevSibling();
}
ShadowManager()->RepositionChild(ShadowManager()->Hold(this),
ShadowManager()->Hold(aChild),
aAfter ? ShadowManager()->Hold(aAfter) : nullptr);
}
BasicContainerLayer::RepositionChild(aChild, aAfter);
}
class BasicShadowContainerLayer : public ShadowContainerLayer, public BasicImplData {
template<class Container>
friend void ContainerInsertAfter(Layer* aChild, Layer* aAfter, Container* aContainer);
template<class Container>
friend void ContainerRemoveChild(Layer* aChild, Container* aContainer);
template<class Container>
friend void ContainerRepositionChild(Layer* aChild, Layer* aAfter, Container* aContainer);
template<class Container>
friend void ContainerComputeEffectiveTransforms(const gfx3DMatrix& aTransformToSurface,
Container* aContainer);
@@ -145,6 +162,8 @@ public:
{ ContainerInsertAfter(aChild, aAfter, this); }
virtual void RemoveChild(Layer* aChild)
{ ContainerRemoveChild(aChild, this); }
virtual void RepositionChild(Layer* aChild, Layer* aAfter)
{ ContainerRepositionChild(aChild, aAfter, this); }
virtual void ComputeEffectiveTransforms(const gfx3DMatrix& aTransformToSurface)
{