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Bug 375684, assertion when source of a drag is the root element, r+sr=roc

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This commit is contained in:
enndeakin@sympatico.ca 2007-03-29 16:58:59 -07:00
parent 649faf4536
commit 1a17f18934
1 changed files with 26 additions and 15 deletions
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41
layout/base/nsPresShell.cpp
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@ -5084,23 +5084,34 @@ PresShell::CreateRangePaintInfo(nsIDOMRange* aRange,
if (!range)
return nsnull;
// get the common ancestor of the two endpoints of the range
nsINode* ancestor = nsContentUtils::GetCommonAncestor(range->GetStartParent(),
range->GetEndParent());
NS_ASSERTION(!ancestor || ancestor->IsNodeOfType(nsINode::eCONTENT),
"common ancestor is not content");
if (!ancestor || !ancestor->IsNodeOfType(nsINode::eCONTENT))
return nsnull;
nsIFrame* ancestorFrame;
nsIFrame* rootFrame = GetRootFrame();
nsIContent* ancestorContent = NS_STATIC_CAST(nsIContent*, ancestor);
// If the start or end of the range is the document, just use the root
// frame, otherwise get the common ancestor of the two endpoints of the
// range.
nsINode* startParent = range->GetStartParent();
nsINode* endParent = range->GetEndParent();
nsIDocument* doc = startParent->GetCurrentDoc();
if (startParent == doc || endParent == doc) {
ancestorFrame = rootFrame;
}
else {
nsINode* ancestor = nsContentUtils::GetCommonAncestor(startParent, endParent);
NS_ASSERTION(!ancestor || ancestor->IsNodeOfType(nsINode::eCONTENT),
"common ancestor is not content");
if (!ancestor || !ancestor->IsNodeOfType(nsINode::eCONTENT))
return nsnull;
nsIFrame* ancestorFrame = GetPrimaryFrameFor(ancestorContent);
nsIContent* ancestorContent = NS_STATIC_CAST(nsIContent*, ancestor);
ancestorFrame = GetPrimaryFrameFor(ancestorContent);
// use the nearest ancestor frame that includes all continuations as the
// root for building the display list
while (ancestorFrame &&
nsLayoutUtils::GetNextContinuationOrSpecialSibling(ancestorFrame))
ancestorFrame = ancestorFrame->GetParent();
// use the nearest ancestor frame that includes all continuations as the
// root for building the display list
while (ancestorFrame &&
nsLayoutUtils::GetNextContinuationOrSpecialSibling(ancestorFrame))
ancestorFrame = ancestorFrame->GetParent();
}
if (!ancestorFrame)
return nsnull;
@ -5124,7 +5135,7 @@ PresShell::CreateRangePaintInfo(nsIDOMRange* aRange,
// determine the offset of the reference frame for the display list
// to the root frame. This will allow the coordinates used when painting
// to all be offset from the same point
info->mRootOffset = ancestorFrame->GetOffsetTo(GetRootFrame());
info->mRootOffset = ancestorFrame->GetOffsetTo(rootFrame);
rangeRect.MoveBy(info->mRootOffset);
aSurfaceRect.UnionRect(aSurfaceRect, rangeRect);