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Bug 1167882 - Move a couple of static helpers functions higher up in TabChild.cpp. r=kats

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This commit is contained in:
Botond Ballo 2015-05-27 16:54:23 -04:00
parent 1950fdd9b7
commit d7bfb48ec3
1 changed files with 16 additions and 14 deletions
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30
dom/ipc/TabChild.cpp
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@ -205,6 +205,22 @@ NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(TabChildBase)
NS_IMPL_CYCLE_COLLECTING_RELEASE(TabChildBase)
// For the root frame, Screen and ParentLayer pixels are interchangeable.
// nsViewportInfo stores zoom values as CSSToScreenScale (because it's a
// data structure specific to the root frame), while FrameMetrics and
// ZoomConstraints store zoom values as CSSToParentLayerScale (because they
// are not specific to the root frame). We define convenience functions for
// converting between the two. As the name suggests, they should only be used
// when dealing with the root frame!
CSSToScreenScale ConvertScaleForRoot(CSSToParentLayerScale aScale)
{
return ViewTargetAs<ScreenPixel>(aScale, PixelCastJustification::ScreenIsParentLayerForRoot);
}
CSSToParentLayerScale ConvertScaleForRoot(CSSToScreenScale aScale)
{
return ViewTargetAs<ParentLayerPixel>(aScale, PixelCastJustification::ScreenIsParentLayerForRoot);
}
void
TabChildBase::InitializeRootMetrics()
{
@ -267,20 +283,6 @@ TabChildBase::GetPageSize(nsCOMPtr<nsIDocument> aDocument, const CSSSize& aViewp
std::max(htmlHeight, bodyHeight));
}
// For the root frame, Screen and ParentLayer pixels are interchangeable.
// nsViewportInfo stores zoom values as CSSToScreenScale (because it's a
// data structure specific to the root frame), while FrameMetrics and
// ZoomConstraints store zoom values as CSSToParentLayerScale (because they
// are not specific to the root frame). We define convenience functions for
// converting between the two. As the name suggests, they should only be used
// when dealing with the root frame!
CSSToScreenScale ConvertScaleForRoot(CSSToParentLayerScale aScale) {
return ViewTargetAs<ScreenPixel>(aScale, PixelCastJustification::ScreenIsParentLayerForRoot);
}
CSSToParentLayerScale ConvertScaleForRoot(CSSToScreenScale aScale) {
return ViewTargetAs<ParentLayerPixel>(aScale, PixelCastJustification::ScreenIsParentLayerForRoot);
}
bool
TabChildBase::HandlePossibleViewportChange(const ScreenIntSize& aOldScreenSize)
{