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Bug 1827009 - Don't assume the textrun has necessarily been created already. r=emilio

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Differential Revision: https://phabricator.services.mozilla.com/D175108
This commit is contained in:
Jonathan Kew
2023-04-11 15:32:57 +00:00
parent 6e0850732f
commit 3cdc5d3da3
1 changed files with 4 additions and 3 deletions
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7
layout/generic/nsLineLayout.cpp
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@@ -3032,14 +3032,15 @@ nscoord nsLineLayout::GetHangFrom(const PerSpanData* aSpan, bool aLineIsRTL) {
return GetHangFrom(childSpan, aLineIsRTL); return GetHangFrom(childSpan, aLineIsRTL);
} }
if (pfd->mIsTextFrame) { if (pfd->mIsTextFrame) {
const auto* lastText = static_cast<const nsTextFrame*>(pfd->mFrame); auto* lastText = static_cast<nsTextFrame*>(pfd->mFrame);
result = lastText->GetHangableISize(); result = lastText->GetHangableISize();
if (result) { if (result) {
// If the hangable space will be at the start edge of the line, due to // If the hangable space will be at the start edge of the line, due to
// its bidi direction being against the line direction, we flag this by // its bidi direction being against the line direction, we flag this by
// negating the advance. // negating the advance.
if (lastText->GetTextRun(nsTextFrame::eInflated)->IsRightToLeft() != lastText->EnsureTextRun(nsTextFrame::eInflated);
aLineIsRTL) { auto* textRun = lastText->GetTextRun(nsTextFrame::eInflated);
if (textRun && textRun->IsRightToLeft() != aLineIsRTL) {
result = -result; result = -result;
} }
} }