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Bug 757362. Use the displayport for the dirty rect (if one is set) when building the display list for a subdocument so that position: fixed items are correctly included. r=roc

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This commit is contained in:
Timothy Nikkel 2012-06-20 17:35:54 -05:00
parent e83aeac3ec
commit 756c5f818c
1 changed files with 11 additions and 4 deletions
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15
layout/generic/nsSubDocumentFrame.cpp
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@ -298,10 +298,17 @@ nsSubDocumentFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
nsRect dirty;
if (subdocRootFrame) {
// get the dirty rect relative to the root frame of the subdoc
dirty = aDirtyRect + GetOffsetToCrossDoc(subdocRootFrame);
// and convert into the appunits of the subdoc
dirty = dirty.ConvertAppUnitsRoundOut(parentAPD, subdocAPD);
nsIDocument* doc = subdocRootFrame->PresContext()->Document();
nsIContent* root = doc ? doc->GetRootElement() : nsnull;
nsRect displayPort;
if (root && nsLayoutUtils::GetDisplayPort(root, &displayPort)) {
dirty = displayPort;
} else {
// get the dirty rect relative to the root frame of the subdoc
dirty = aDirtyRect + GetOffsetToCrossDoc(subdocRootFrame);
// and convert into the appunits of the subdoc
dirty = dirty.ConvertAppUnitsRoundOut(parentAPD, subdocAPD);
}
aBuilder->EnterPresShell(subdocRootFrame, dirty);
}