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Avoid crash when selecting long text
In some (not yet understood) situations, the paragraph metrics cache
is empty in generateSyntheticMouseEvent(). We just avoid a crash in
this case, but there is probably an underlying problem that deserves
being fixed.
Fixes bug #10324.
(cherry picked from commit 4efb129ccb
)
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parent
9c0dd478df
commit
4fbb0f1770
@ -94,6 +94,8 @@ public:
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bool redoParagraph(pit_type const pit);
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/// Clear cache of paragraph metrics
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void clear() { par_metrics_.clear(); }
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/// Is cache of paragraph metrics empty ?
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bool empty() const { return par_metrics_.empty(); }
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///
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int ascent() const { return dim_.asc; }
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@ -1009,12 +1009,18 @@ void GuiWorkArea::generateSyntheticMouseEvent()
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// In which paragraph do we have to set the cursor ?
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Cursor & cur = d->buffer_view_->cursor();
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// FIXME: we don't know howto handle math.
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// FIXME: we don't know how to handle math.
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Text * text = cur.text();
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if (!text)
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return;
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TextMetrics const & tm = d->buffer_view_->textMetrics(text);
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// Quit gracefully if there are no metrics, since otherwise next
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// line would crash (bug #10324).
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// This situation seems related to a (not yet understood) timing problem.
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if (tm.empty())
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return;
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pair<pit_type, const ParagraphMetrics *> pp = up ? tm.first() : tm.last();
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ParagraphMetrics const & pm = *pp.second;
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pit_type const pit = pp.first;
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@ -91,6 +91,8 @@ What's new
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- Fix random crash when dissolving inset (bug 10667).
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- Avoid crash when selecting long text (bug 10324).
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- Avoid a case of stuck cursor after entering an inset (bug 10630).
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