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Fix two errors with character/line insertion and deletion: the maximum number

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of characters which may be inserted or deleted is the screen width, not one
less (and similarly for lines and height); and if characters or lines are
deleted by moving the ones that follow, the space at the end needs to be
cleared.

This appears to solve long-standing redraw issues most visible when using the
force-width option then scrolling in view(1) or unwrapping lines in emacs.
This commit is contained in:
Nicholas Marriott
2009-06-29 21:30:50 +00:00
parent 003e8e65f7
commit 68e06fb6b7
2 changed files with 12 additions and 10 deletions
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16
screen-write.c
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@ -325,8 +325,8 @@ screen_write_insertcharacter(struct screen_write_ctx *ctx, u_int nx)
if (nx == 0)
nx = 1;
if (nx > screen_size_x(s) - 1 - s->cx)
nx = screen_size_x(s) - 1 - s->cx;
if (nx > screen_size_x(s) - s->cx)
nx = screen_size_x(s) - s->cx;
if (nx == 0)
return;
@ -347,8 +347,8 @@ screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx)
if (nx == 0)
nx = 1;
if (nx > screen_size_x(s) - 1 - s->cx)
nx = screen_size_x(s) - 1 - s->cx;
if (nx > screen_size_x(s) - s->cx)
nx = screen_size_x(s) - s->cx;
if (nx == 0)
return;
@ -369,8 +369,8 @@ screen_write_insertline(struct screen_write_ctx *ctx, u_int ny)
if (ny == 0)
ny = 1;
if (ny > screen_size_y(s) - 1 - s->cy)
ny = screen_size_y(s) - 1 - s->cy;
if (ny > screen_size_y(s) - s->cy)
ny = screen_size_y(s) - s->cy;
if (ny == 0)
return;
@ -395,8 +395,8 @@ screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny)
if (ny == 0)
ny = 1;
if (ny > screen_size_y(s) - 1 - s->cy)
ny = screen_size_y(s) - 1 - s->cy;
if (ny > screen_size_y(s) - s->cy)
ny = screen_size_y(s) - s->cy;
if (ny == 0)
return;