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Fix window.print crash when called early during page loading. b=66934 r=pollmann@netscape.com sr=jst@netscape.com

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git-svn-id: svn://10.0.0.236/trunk@94778 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
locka%iol.ie
2001-05-12 15:52:06 +00:00
parent 9a799b27ad
commit 14926f398b
4 changed files with 58 additions and 44 deletions
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37
mozilla/layout/base/nsPresShell.cpp
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@@ -1130,7 +1130,7 @@ protected:
nsICSSStyleSheet* mPrefStyleSheet; // mStyleSet owns it but we maintaina ref, may be null
PRPackedBool mEnablePrefStyleSheet;
nsIViewManager* mViewManager; // [WEAK] docViewer owns it so I don't have to
nsILayoutHistoryState* mHistoryState; // [WEAK] session history owns this
nsWeakPtr mHistoryState; // [WEAK] session history owns this
PRUint32 mUpdateCount;
// normal reflow commands
nsVoidArray mReflowCommands;
@@ -3333,11 +3333,12 @@ PresShell::EndLoad(nsIDocument *aDocument)
// Restore frame state for the root scroll frame
nsIFrame* rootFrame = nsnull;
GetRootFrame(&rootFrame);
if (rootFrame && mHistoryState) {
nsCOMPtr<nsILayoutHistoryState> historyState = do_QueryReferent(mHistoryState);
if (rootFrame && historyState) {
nsIFrame* scrollFrame = nsnull;
GetRootScrollFrame(mPresContext, rootFrame, &scrollFrame);
if (scrollFrame) {
mFrameManager->RestoreFrameStateFor(mPresContext, scrollFrame, mHistoryState, nsIStatefulFrame::eDocumentScrollState);
mFrameManager->RestoreFrameStateFor(mPresContext, scrollFrame, historyState, nsIStatefulFrame::eDocumentScrollState);
}
}
@@ -4150,21 +4151,21 @@ PresShell::CaptureHistoryState(nsILayoutHistoryState** aState, PRBool aLeavingPa
NS_PRECONDITION(nsnull != aState, "null state pointer");
if (!mHistoryState) {
nsCOMPtr<nsILayoutHistoryState> historyState = do_QueryReferent(mHistoryState);
if (!historyState) {
// Create the document state object
rv = NS_NewLayoutHistoryState(aState); // This addrefs
rv = NS_NewLayoutHistoryState(getter_AddRefs(historyState));
if (NS_FAILED(rv)) {
*aState = nsnull;
return rv;
}
mHistoryState = *aState;
}
else {
*aState = mHistoryState;
NS_IF_ADDREF(mHistoryState);
mHistoryState = getter_AddRefs(NS_GetWeakReference(historyState));
}
*aState = historyState;
NS_IF_ADDREF(*aState);
// Capture frame state for the entire frame hierarchy
nsIFrame* rootFrame = nsnull;
@@ -4178,12 +4179,12 @@ PresShell::CaptureHistoryState(nsILayoutHistoryState** aState, PRBool aLeavingPa
nsIFrame* scrollFrame = nsnull;
rv = GetRootScrollFrame(mPresContext, rootFrame, &scrollFrame);
if (scrollFrame) {
rv = mFrameManager->CaptureFrameStateFor(mPresContext, scrollFrame, mHistoryState, nsIStatefulFrame::eDocumentScrollState);
rv = mFrameManager->CaptureFrameStateFor(mPresContext, scrollFrame, historyState, nsIStatefulFrame::eDocumentScrollState);
}
}
rv = mFrameManager->CaptureFrameState(mPresContext, rootFrame, mHistoryState);
rv = mFrameManager->CaptureFrameState(mPresContext, rootFrame, historyState);
return rv;
}
@@ -4191,15 +4192,16 @@ PresShell::CaptureHistoryState(nsILayoutHistoryState** aState, PRBool aLeavingPa
NS_IMETHODIMP
PresShell::GetHistoryState(nsILayoutHistoryState** aState)
{
NS_IF_ADDREF(mHistoryState);
*aState = mHistoryState;
nsCOMPtr<nsILayoutHistoryState> historyState = do_QueryReferent(mHistoryState);
*aState = historyState;
NS_IF_ADDREF(*aState);
return NS_OK;
}
NS_IMETHODIMP
PresShell::SetHistoryState(nsILayoutHistoryState* aLayoutHistoryState)
{
mHistoryState = aLayoutHistoryState;
mHistoryState = getter_AddRefs(NS_GetWeakReference(aLayoutHistoryState));
return NS_OK;
}
@@ -4819,7 +4821,8 @@ PresShell::ContentAppended(nsIDocument *aDocument,
nsresult rv = mStyleSet->ContentAppended(mPresContext, aContainer, aNewIndexInContainer);
VERIFY_STYLE_TREE;
if (NS_SUCCEEDED(rv) && nsnull != mHistoryState) {
nsCOMPtr<nsILayoutHistoryState> historyState = do_QueryReferent(mHistoryState);
if (NS_SUCCEEDED(rv) && historyState) {
// If history state has been set by session history, ask the frame manager
// to restore frame state for the frame hierarchy created for the chunk of
// content that just came in.
@@ -4839,7 +4842,7 @@ PresShell::ContentAppended(nsIDocument *aDocument,
nsIFrame* frame;
rv = GetPrimaryFrameFor(newChild, &frame);
if (NS_SUCCEEDED(rv) && nsnull != frame)
mFrameManager->RestoreFrameState(mPresContext, frame, mHistoryState);
mFrameManager->RestoreFrameState(mPresContext, frame, historyState);
}
}