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Avoid crash with cursor down in math

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This can happen when the inset that contains the cursor is outside of
the screen.

THis is only a workaround. The real solution would be a
processUpdateFlags(FitCursor) call, but the code is not ready for that
yet.

Fixes bug #11296.
This commit is contained in:
Jean-Marc Lasgouttes 2018-09-20 22:15:12 +02:00
parent 328ff9df3a
commit 17576fb83b
1 changed files with 9 additions and 1 deletions
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8
src/mathed/InsetMathGrid.cpp
View File

@ -22,6 +22,7 @@
#include "Buffer.h" #include "Buffer.h"
#include "BufferParams.h" #include "BufferParams.h"
#include "BufferView.h" #include "BufferView.h"
#include "CoordCache.h"
#include "Cursor.h" #include "Cursor.h"
#include "CutAndPaste.h" #include "CutAndPaste.h"
#include "FuncRequest.h" #include "FuncRequest.h"
@ -969,7 +970,14 @@ bool InsetMathGrid::idxUpDown(Cursor & cur, bool up) const
LASSERT(cur.idx() > 0, return false); LASSERT(cur.idx() > 0, return false);
--cur.idx(); --cur.idx();
} }
// FIXME: this is only a workaround to avoid a crash if the inset
// in not in coord cache. The best would be to force a FitCursor
// operation.
CoordCache::Arrays const & arraysCache = cur.bv().coordCache().arrays();
if (arraysCache.has(&cur.cell()))
cur.pos() = cur.cell().x2pos(&cur.bv(), cur.x_target() - cur.cell().xo(cur.bv())); cur.pos() = cur.cell().x2pos(&cur.bv(), cur.x_target() - cur.cell().xo(cur.bv()));
else
cur.pos() = 0;
return true; return true;
} }