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Fix bug #8837: LyX hangs on selection

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The code that checks whether the cursor was at the end of a row in
Cursor::upDowninText was not able to set boundary correctly. This
causes a hang in because the cursor got stuck on a line and there is an
infinite loop BufferView::dispatch when trying to go down.

The fix is to avoid using the watered-down TextMetrics::x2pos wrapper
around getColumnNearX and use the real thing instead.

Eventually, the last user of x2pos (InsetTabular) should be fixed and
the method should go away.
This commit is contained in:
Jean-Marc Lasgouttes 2014-03-17 11:15:42 +01:00
parent a27333144d
commit 264ea28cbd
1 changed files with 6 additions and 10 deletions
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16
src/Cursor.cpp
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@ -2107,17 +2107,13 @@ bool Cursor::upDownInText(bool up, bool & updateNeeded)
next_row = 0;
}
}
top().pos() = min(tm.x2pos(pit(), next_row, xo), top().lastpos());
int const xpos = tm.x2pos(pit(), next_row, xo);
bool const at_end_row = xpos == tm.x2pos(pit(), next_row, tm.width());
bool const at_beg_row = xpos == tm.x2pos(pit(), next_row, 0);
if (at_end_row && at_beg_row)
// make sure the cursor ends up on this row
boundary(false);
else
boundary(at_end_row);
Row const & real_next_row = tm.parMetrics(pit()).rows()[next_row];
bool bound = false;
pos_type const col = tm.getColumnNearX(pit(), real_next_row,
xo, bound);
top().pos() = real_next_row.pos() + col;
boundary(bound);
updateNeeded |= bv().checkDepm(*this, old);
}