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Changed PaintChildren() to check for lines that intersect the damage

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This commit is contained in:
troy%netscape.com 1998-07-24 03:18:35 +00:00
parent 73849c8195
commit ab555eff47
1 changed files with 47 additions and 39 deletions
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86
layout/css/layout/src/nsCSSBlockFrame.cpp
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@ -3924,9 +3924,6 @@ nsCSSBlockFrame::Paint(nsIPresContext& aPresContext,
// aDirtyRect is in our coordinate system
// child rect's are also in our coordinate system
// XXX take advantage of line information to skip entire lines
void
nsCSSBlockFrame::PaintChildren(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
@ -3943,47 +3940,58 @@ nsCSSBlockFrame::PaintChildren(nsIPresContext& aPresContext,
hidden = PR_TRUE;
}
// XXX reminder: use the coordinates in the dirty rect to figure out
// which set of children are impacted and only do the intersection
// work for them. In addition, stop when we no longer overlap.
// Iterate the lines looking for lines that intersect the dirty rect
for (LineData* line = mLines; nsnull != line; line = line->mNext) {
// Stop when we get to a line that's below the dirty rect
if (line->mBounds.y >= aDirtyRect.YMost()) {
break;
}
nsIFrame* kid = (nsnull == mLines) ? nsnull : mLines->mFirstChild;
while (nsnull != kid) {
nsIView *pView;
kid->GetView(pView);
if (nsnull == pView) {
nsRect kidRect;
kid->GetRect(kidRect);
nsRect damageArea;
PRBool overlap = damageArea.IntersectRect(aDirtyRect, kidRect);
if (overlap) {
// Translate damage area into kid's coordinate system
nsRect kidDamageArea(damageArea.x - kidRect.x,
damageArea.y - kidRect.y,
damageArea.width, damageArea.height);
aRenderingContext.PushState();
aRenderingContext.Translate(kidRect.x, kidRect.y);
kid->Paint(aPresContext, aRenderingContext, kidDamageArea);
if (nsIFrame::GetShowFrameBorders()) {
nsIView* view;
GetView(view);
if (nsnull != view) {
aRenderingContext.SetColor(NS_RGB(0,0,255));
NS_RELEASE(view);
// If the line overlaps the dirty rect then iterate the child frames
// and paint those frames that intersect the dirty rect
if (line->mBounds.YMost() > aDirtyRect.y) {
nsIFrame* kid = line->mFirstChild;
for (PRUint16 i = 0; i < line->mChildCount; i++) {
nsIView *pView;
kid->GetView(pView);
if (nsnull == pView) {
nsRect kidRect;
kid->GetRect(kidRect);
nsRect damageArea;
PRBool overlap = damageArea.IntersectRect(aDirtyRect, kidRect);
if (overlap) {
// Translate damage area into kid's coordinate system
nsRect kidDamageArea(damageArea.x - kidRect.x,
damageArea.y - kidRect.y,
damageArea.width, damageArea.height);
aRenderingContext.PushState();
aRenderingContext.Translate(kidRect.x, kidRect.y);
kid->Paint(aPresContext, aRenderingContext, kidDamageArea);
if (nsIFrame::GetShowFrameBorders()) {
nsIView* view;
GetView(view);
if (nsnull != view) {
aRenderingContext.SetColor(NS_RGB(0,0,255));
NS_RELEASE(view);
}
else {
aRenderingContext.SetColor(NS_RGB(255,0,0));
}
aRenderingContext.DrawRect(0, 0, kidRect.width, kidRect.height);
}
aRenderingContext.PopState();
}
else {
aRenderingContext.SetColor(NS_RGB(255,0,0));
}
aRenderingContext.DrawRect(0, 0, kidRect.width, kidRect.height);
}
aRenderingContext.PopState();
else {
NS_RELEASE(pView);
}
// Get the next frame on this line
kid->GetNextSibling(kid);
}
}
else {
NS_RELEASE(pView);
}
kid->GetNextSibling(kid);
}
if (hidden) {