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Bug 186752 - Crash during background painting when there is no scrollable frame. Add a null check. 

r+sr=dbaron
This commit is contained in:
caillon%returnzero.com 2002-12-27 07:32:17 +00:00
Родитель c1dffb47a1
Коммит 27c6aebd18
2 изменённых файлов: 38 добавлений и 38 удалений
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38
layout/base/nsCSSRendering.cpp
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@ -2929,26 +2929,26 @@ nsCSSRendering::PaintBackgroundWithSC(nsIPresContext* aPresContext,
scrollableFrame = GetRootScrollableFrame(aPresContext, rootFrame);
}
NS_ASSERTION(scrollableFrame, "no scrollable frame");
if (scrollableFrame) {
// Now, account for scrollbars, if we have any.
PRBool verticalVisible;
PRBool horizontalVisible;
scrollableFrame->GetScrollbarVisibility(aPresContext, &verticalVisible,
&horizontalVisible);
// Now, account for scrollbars, if we have any.
PRBool verticalVisible;
PRBool horizontalVisible;
scrollableFrame->GetScrollbarVisibility(aPresContext, &verticalVisible,
&horizontalVisible);
if (verticalVisible || horizontalVisible) {
nscoord verticalWidth;
nscoord horizontalHeight;
scrollableFrame->GetScrollbarSizes(aPresContext, &verticalWidth,
&horizontalHeight);
if (verticalVisible) {
// Assumes vertical scrollbars are on the right.
viewportArea.width -= verticalWidth;
}
if (horizontalVisible) {
// Assumes horizontal scrollbars are on the bottom.
viewportArea.height -= horizontalHeight;
if (verticalVisible || horizontalVisible) {
nscoord verticalWidth;
nscoord horizontalHeight;
scrollableFrame->GetScrollbarSizes(aPresContext, &verticalWidth,
&horizontalHeight);
if (verticalVisible) {
// Assumes vertical scrollbars are on the right.
viewportArea.width -= verticalWidth;
}
if (horizontalVisible) {
// Assumes horizontal scrollbars are on the bottom.
viewportArea.height -= horizontalHeight;
}
}
}

38
layout/html/style/src/nsCSSRendering.cpp
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@ -2929,26 +2929,26 @@ nsCSSRendering::PaintBackgroundWithSC(nsIPresContext* aPresContext,
scrollableFrame = GetRootScrollableFrame(aPresContext, rootFrame);
}
NS_ASSERTION(scrollableFrame, "no scrollable frame");
if (scrollableFrame) {
// Now, account for scrollbars, if we have any.
PRBool verticalVisible;
PRBool horizontalVisible;
scrollableFrame->GetScrollbarVisibility(aPresContext, &verticalVisible,
&horizontalVisible);
// Now, account for scrollbars, if we have any.
PRBool verticalVisible;
PRBool horizontalVisible;
scrollableFrame->GetScrollbarVisibility(aPresContext, &verticalVisible,
&horizontalVisible);
if (verticalVisible || horizontalVisible) {
nscoord verticalWidth;
nscoord horizontalHeight;
scrollableFrame->GetScrollbarSizes(aPresContext, &verticalWidth,
&horizontalHeight);
if (verticalVisible) {
// Assumes vertical scrollbars are on the right.
viewportArea.width -= verticalWidth;
}
if (horizontalVisible) {
// Assumes horizontal scrollbars are on the bottom.
viewportArea.height -= horizontalHeight;
if (verticalVisible || horizontalVisible) {
nscoord verticalWidth;
nscoord horizontalHeight;
scrollableFrame->GetScrollbarSizes(aPresContext, &verticalWidth,
&horizontalHeight);
if (verticalVisible) {
// Assumes vertical scrollbars are on the right.
viewportArea.width -= verticalWidth;
}
if (horizontalVisible) {
// Assumes horizontal scrollbars are on the bottom.
viewportArea.height -= horizontalHeight;
}
}
}