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* TextMetrics::getPitNearY(): Fix crash when navigating with up and down arrow keys. The problem was that the passed y coordinates was not necessarily out of screen. Also the paragraph position was not correctly updated.

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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@21798 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Abdelrazak Younes 2007-11-26 15:29:54 +00:00
parent 1133419a59
commit de8ce17784
1 changed files with 15 additions and 19 deletions
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34
src/TextMetrics.cpp
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@ -1226,7 +1226,7 @@ pit_type TextMetrics::getPitNearY(int y)
<< ": y: " << y << " cache size: " << par_metrics_.size());
// look for highest numbered paragraph with y coordinate less than given y
pit_type pit = 0;
pit_type pit = -1;
int yy = -1;
ParMetricsCache::const_iterator it = par_metrics_.begin();
ParMetricsCache::const_iterator et = par_metrics_.end();
@ -1234,35 +1234,31 @@ pit_type TextMetrics::getPitNearY(int y)
ParagraphMetrics const & pm = it->second;
// If we are off-screen (before the visible part)
if (y < 0
// and even before the first paragraph in the cache.
&& y < it->second.position() - int(pm.ascent())) {
// and we are not at the first paragraph in the inset.
if (y < it->second.position() - int(pm.ascent())) {
// We are looking for a position that is before the first paragraph in
// the cache (which is in priciple off-screen, that is before the
// visible part.
if (it->first == 0)
// We are already at the first paragraph in the inset.
return 0;
// then this is the paragraph we are looking for.
// OK, this is the paragraph we are looking for.
pit = it->first - 1;
// rebreak it and update the CoordCache.
redoParagraph(pit);
par_metrics_[pit].setPosition(it->second.position() - pm.descent());
newParMetricsUp();
return pit;
}
ParagraphMetrics const & pm_last = par_metrics_[last->first];
// If we are off-screen (after the visible part)
if (y > bv_->workHeight()
// and even after the first paragraph in the cache.
&& y >= last->second.position() + int(pm_last.descent())) {
if (y >= last->second.position() + int(pm_last.descent())) {
// We are looking for a position that is after the last paragraph in
// the cache (which is in priciple off-screen, that is before the
// visible part.
pit = last->first + 1;
// and we are not at the last paragraph in the inset.
if (pit == int(text_->paragraphs().size()))
// We are already at the last paragraph in the inset.
return last->first;
// then this is the paragraph we are looking for.
// rebreak it and update the CoordCache.
redoParagraph(pit);
par_metrics_[pit].setPosition(last->second.position() + pm_last.ascent());
// OK, this is the paragraph we are looking for.
newParMetricsDown();
return pit;
}