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Fix crash printing fixed-position float elements (bug 200347), r=kin@netscape.com, sr=dbaron@dbaron.org, a=asa

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git-svn-id: svn://10.0.0.236/trunk@142762 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
jkeiser%netscape.com
2003-05-22 20:56:35 +00:00
parent 8528871fe1
commit d214c656a8
8 changed files with 220 additions and 190 deletions
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94
mozilla/layout/generic/nsBlockFrame.cpp
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@@ -253,100 +253,6 @@ RecordReflowStatus(PRBool aChildIsBlock, nsReflowStatus aFrameReflowStatus)
//----------------------------------------------------------------------
/**
* A helper class to manage maintenance of the space manager during
* nsBlockFrame::Reflow. It automatically restores the old space
* manager in the reflow state when the object goes out of scope.
*/
class nsAutoSpaceManager {
public:
nsAutoSpaceManager(nsHTMLReflowState& aReflowState)
: mReflowState(aReflowState),
#ifdef DEBUG
mOwns(PR_TRUE),
#endif
mNew(nsnull),
mOld(nsnull) {}
~nsAutoSpaceManager();
/**
* Create a new space manager for the specified frame. This will
* `remember' the old space manager, and install the new space
* manager in the reflow state.
*/
nsresult
CreateSpaceManagerFor(nsIPresContext *aPresContext,
nsIFrame *aFrame);
#ifdef DEBUG
/**
* `Orphan' any space manager that the nsAutoSpaceManager created;
* i.e., make it so that we don't destroy the space manager when we
* go out of scope.
*/
void DebugOrphanSpaceManager() { mOwns = PR_FALSE; }
#endif
protected:
nsHTMLReflowState &mReflowState;
#ifdef DEBUG
PRBool mOwns;
#endif
nsSpaceManager *mNew;
nsSpaceManager *mOld;
};
nsAutoSpaceManager::~nsAutoSpaceManager()
{
// Restore the old space manager in the reflow state if necessary.
if (mNew) {
#ifdef NOISY_SPACEMANAGER
printf("restoring old space manager %p\n", mOld);
#endif
mReflowState.mSpaceManager = mOld;
#ifdef NOISY_SPACEMANAGER
if (mOld) {
NS_STATIC_CAST(nsFrame *, mReflowState.frame)->ListTag(stdout);
printf(": space-manager %p after reflow\n", mOld);
mOld->List(stdout);
}
#endif
#ifdef DEBUG
if (mOwns)
#endif
delete mNew;
}
}
nsresult
nsAutoSpaceManager::CreateSpaceManagerFor(nsIPresContext *aPresContext, nsIFrame *aFrame)
{
// Create a new space manager and install it in the reflow
// state. `Remember' the old space manager so we can restore it
// later.
nsCOMPtr<nsIPresShell> shell;
aPresContext->GetShell(getter_AddRefs(shell));
mNew = new nsSpaceManager(shell, aFrame);
if (! mNew)
return NS_ERROR_OUT_OF_MEMORY;
#ifdef NOISY_SPACEMANAGER
printf("constructed new space manager %p (replacing %p)\n",
mNew, mReflowState.mSpaceManager);
#endif
// Set the space manager in the existing reflow state
mOld = mReflowState.mSpaceManager;
mReflowState.mSpaceManager = mNew;
return NS_OK;
}
//----------------------------------------------------------------------
void
nsBlockFrame::CombineRects(const nsRect& r1, nsRect& r2)
{