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[layout] Always check against fragment length in nsTextFrame

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Moonchild 2023-12-20 13:19:00 +01:00 • committed by roytam1
commit 8fe53f59d0
1 changed files with 7 additions and 3 deletions
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10
layout/generic/nsTextFrame.cpp
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@ -711,7 +711,11 @@ GlyphObserver::NotifyGlyphsChanged()
int32_t nsTextFrame::GetContentEnd() const {
nsTextFrame* next = static_cast<nsTextFrame*>(GetNextContinuation());
return next ? next->GetContentOffset() : mContent->GetText()->GetLength();
// In case of allocation failure when setting/modifying the textfragment,
// it's possible our text might be missing. So we check the fragment length,
// in addition to the offset of the next continuation (if any).
int32_t fragLen = mContent->GetText()->GetLength();
return next ? std::min(fragLen, next->GetContentOffset()) : fragLen;
}
struct FlowLengthProperty {
@ -1078,8 +1082,8 @@ public:
nsIFrame* mAncestorControllingInitialBreak;
int32_t GetContentEnd() {
return mEndFrame ? mEndFrame->GetContentOffset()
: mStartFrame->GetContent()->GetText()->GetLength();
int32_t fragLen = mStartFrame->GetContent()->GetText()->GetLength();
return mEndFrame ? std::min(fragLen, mEndFrame->GetContentOffset()) : fragLen;
}
};