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branch: Fix bug #6237: The boundary has to be set correctly when moving up with a selection. If not, the cursor will remain on the same row when there are two e.g. displayed equations after each other. This will cause an infinite loop when SCREEN_UP is executed.

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(I added a small extra safety measure to not change the logic resulting from r31864. I'm not sure it can harm.)

see r31863, r31864.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/branches/BRANCH_1_6_X@31880 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Vincent van Ravesteijn 2009-11-06 18:08:06 +00:00
parent 59cfb45de0
commit f38483d441
2 changed files with 20 additions and 5 deletions
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22
src/Cursor.cpp
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@ -1859,31 +1859,43 @@ bool Cursor::upDownInText(bool up, bool & updateNeeded)
operator=(dummy);
}
} else {
// if there is a selection, we stay out of any inset, and just jump to the right position:
// if there is a selection, we stay out of any inset,
// and just jump to the right position:
Cursor old = *this;
int next_row = row;
bool update = false;
if (up) {
if (row > 0) {
top().pos() = min(tm.x2pos(pit(), row - 1, xo), top().lastpos());
--next_row;
update = true;
} else if (pit() > 0) {
--pit();
TextMetrics & tm = bv_->textMetrics(text());
if (!tm.contains(pit()))
tm.newParMetricsUp();
ParagraphMetrics const & pmcur = tm.parMetrics(pit());
top().pos() = min(tm.x2pos(pit(), pmcur.rows().size() - 1, xo), top().lastpos());
next_row = pmcur.rows().size() - 1;
update = true;
}
} else {
if (row + 1 < int(pm.rows().size())) {
top().pos() = min(tm.x2pos(pit(), row + 1, xo), top().lastpos());
++next_row;
update = true;
} else if (pit() + 1 < int(text()->paragraphs().size())) {
++pit();
TextMetrics & tm = bv_->textMetrics(text());
if (!tm.contains(pit()))
tm.newParMetricsDown();
top().pos() = min(tm.x2pos(pit(), 0, xo), top().lastpos());
next_row = 0;
update = true;
}
}
if (update) {
top().pos() = min(tm.x2pos(pit(), next_row, xo), top().lastpos());
boundary(tm.x2pos(pit(), next_row, xo)
== tm.x2pos(pit(), next_row, tm.width()));
}
updateNeeded |= bv().checkDepm(*this, old);
}

3
status.16x
View File

@ -192,6 +192,9 @@ What's new
- Fix a crash when leaving an empty superscript or subscript (bug 6193).
- Fix an infinite loop when selecting multiple displayed equation right
after each other with LFUN_SCREEN_UP (bug 6237).
- Fix a number of assertions when displaying error messages (bug 6205).
- Fix bad allocation exception when displaying long tooltips (bug 6215).