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Bug 710373 - Pressing the vertical slider down arrow should move three lines instead of one. r=roc

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This commit is contained in:
Jared Wein 2012-01-31 12:04:35 +01:00
parent 145530e7f8
commit e7ae7fed94
1 changed files with 3 additions and 2 deletions
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5
layout/generic/nsGfxScrollFrame.cpp
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@ -3233,7 +3233,8 @@ nsGfxScrollFrameInner::ReflowFinished()
nsPoint scrollPos = GetScrollPosition();
// XXX shouldn't we use GetPageScrollAmount/GetLineScrollAmount here?
if (vScroll) {
nscoord fontHeight = GetLineScrollAmount().height;
const double kScrollMultiplier = 3;
nscoord fontHeight = GetLineScrollAmount().height * kScrollMultiplier;
// We normally use (scrollArea.height - fontHeight) for height
// of page scrolling. However, it is too small when
// fontHeight is very large. (If fontHeight is larger than
@ -3243,7 +3244,7 @@ nsGfxScrollFrameInner::ReflowFinished()
nscoord pageincrement = nscoord(mScrollPort.height - fontHeight);
nscoord pageincrementMin = nscoord(float(mScrollPort.height) * 0.8);
FinishReflowForScrollbar(vScroll, minY, maxY, scrollPos.y,
NS_MAX(pageincrement,pageincrementMin),
NS_MAX(pageincrement, pageincrementMin),
fontHeight);
}
if (hScroll) {