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Bug 720142 - Only calculate the border half we actally use. r=bernd

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This commit is contained in:
Mats Palmgren 2012-01-22 23:48:34 +01:00
parent 86699a57d7
commit c4841a3e7f
1 changed files with 7 additions and 6 deletions
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13
layout/tables/nsTableFrame.cpp
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@ -6275,20 +6275,21 @@ BCPaintBorderIterator::SetDamageArea(const nsRect& aDirtyRect)
for (colX = leftCol; colX != rightCol; colX += mColInc) {
nsTableColFrame* colFrame = mTableFirstInFlow->GetColFrame(colX);
if (!colFrame) ABORT1(false);
// conservatively estimate the half border widths outside the col
nscoord leftBorderHalf =
nsPresContext::CSSPixelsToAppUnits(colFrame->GetLeftBorderWidth() + 1);
nscoord rightBorderHalf =
nsPresContext::CSSPixelsToAppUnits(colFrame->GetRightBorderWidth() + 1);
// get the col rect relative to the table rather than the col group
nsSize size = colFrame->GetSize();
if (haveIntersect) {
// conservatively estimate the left half border width outside the col
nscoord leftBorderHalf =
nsPresContext::CSSPixelsToAppUnits(colFrame->GetLeftBorderWidth() + 1);
if (aDirtyRect.XMost() >= (x - leftBorderHalf)) {
endColIndex = colX;
}
else break;
}
else {
// conservatively estimate the right half border width outside the col
nscoord rightBorderHalf =
nsPresContext::CSSPixelsToAppUnits(colFrame->GetRightBorderWidth() + 1);
if ((x + size.width + rightBorderHalf) >= aDirtyRect.x) {
startColIndex = endColIndex = colX;
haveIntersect = true;
@ -6339,7 +6340,7 @@ BCPaintBorderIterator::Reset()
mCellData = nsnull;
mBCData = nsnull;
ResetVerInfo();
}
}
/**
* Set the iterator data to a new cellmap coordinate