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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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6
grid-view.c
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@ -158,6 +158,7 @@ grid_view_delete_lines(struct grid *gd, u_int py, u_int ny)
sy = grid_view_y(gd, gd->sy);
grid_move_lines(gd, py, py + ny, sy - py - ny);
grid_clear(gd, 0, sy - ny, gd->sx, py + ny - (sy - ny));
}
/* Delete lines inside scroll region. */
@ -191,7 +192,7 @@ grid_view_insert_cells(struct grid *gd, u_int px, u_int py, u_int nx)
if (px == sx - 1)
grid_clear(gd, px, py, 1, 1);
else
grid_move_cells(gd, px + nx, px, py, (sx - 1) - (px + nx));
grid_move_cells(gd, px + nx, px, py, sx - px - nx);
}
/* Delete characters. */
@ -207,7 +208,8 @@ grid_view_delete_cells(struct grid *gd, u_int px, u_int py, u_int nx)
sx = grid_view_x(gd, gd->sx);
grid_move_cells(gd, px, px + nx, py, (sx - 1) - (px + nx));
grid_move_cells(gd, px, px + nx, py, sx - px - nx);
grid_clear(gd, sx - nx, py, px + nx - (sx - nx), 1);
}
/* Convert cells into a string. */