static void
RecenterDisplayPort(mozilla::layers::FrameMetrics& aFrameMetrics)
{
ScreenMargin margins = aFrameMetrics.GetDisplayPortMargins();
margins.right = margins.left = margins.LeftRight() / 2;
margins.top = margins.bottom = margins.TopBottom() / 2;
aFrameMetrics.SetDisplayPortMargins(margins);
}
void
MobileViewportManager::UpdateSPCSPS(const ScreenIntSize& aDisplaySize,
const CSSToScreenScale& aZoom)
{
ScreenSize compositionSize(aDisplaySize);
ScreenMargin scrollbars =
CSSMargin::FromAppUnits(
nsLayoutUtils::ScrollbarAreaToExcludeFromCompositionBoundsFor(
mPresShell->GetRootScrollFrame()))
* CSSToScreenScale(1.0f); // Scrollbars are not subject to scaling, so
// CSS pixels = layer pixels for them (modulo bug 1168487).
compositionSize.width -= scrollbars.LeftRight();
compositionSize.height -= scrollbars.TopBottom();
CSSSize compSize = compositionSize / aZoom;
MVM_LOG("%p: Setting SPCSPS %s\n", this, Stringify(compSize).c_str());
nsLayoutUtils::SetScrollPositionClampingScrollPortSize(mPresShell, compSize);
}
void
MobileViewportManager::UpdateSPCSPS(const ScreenIntSize& aDisplaySize,
const CSSToScreenScale& aZoom)
{
ScreenSize compositionSize(aDisplaySize);
ScreenMargin scrollbars =
LayoutDeviceMargin::FromAppUnits(
nsLayoutUtils::ScrollbarAreaToExcludeFromCompositionBoundsFor(
mPresShell->GetRootScrollFrame()),
mPresShell->GetPresContext()->AppUnitsPerDevPixel())
// Scrollbars are not subject to resolution scaling, so LD pixels =
// Screen pixels for them.
* LayoutDeviceToScreenScale(1.0f);
compositionSize.width -= scrollbars.LeftRight();
compositionSize.height -= scrollbars.TopBottom();
CSSSize compSize = compositionSize / aZoom;
MVM_LOG("%p: Setting SPCSPS %s\n", this, Stringify(compSize).c_str());
nsLayoutUtils::SetScrollPositionClampingScrollPortSize(mPresShell, compSize);
}
