4 * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 #include <sys/types.h>
26 * Grid view functions. These work using coordinates relative to the visible
30 #define grid_view_x(gd, x) (x)
31 #define grid_view_y(gd, y) ((gd)->hsize + (y))
33 /* Get cell for reading. */
34 const struct grid_cell
*
35 grid_view_peek_cell(struct grid
*gd
, u_int px
, u_int py
)
37 return (grid_peek_cell(gd
, grid_view_x(gd
, px
), grid_view_y(gd
, py
)));
40 /* Get cell for writing. */
42 grid_view_get_cell(struct grid
*gd
, u_int px
, u_int py
)
44 return (grid_get_cell(gd
, grid_view_x(gd
, px
), grid_view_y(gd
, py
)));
50 struct grid
*gd
, u_int px
, u_int py
, const struct grid_cell
*gc
)
52 grid_set_cell(gd
, grid_view_x(gd
, px
), grid_view_y(gd
, py
), gc
);
55 /* Get UTF-8 for reading. */
56 const struct grid_utf8
*
57 grid_view_peek_utf8(struct grid
*gd
, u_int px
, u_int py
)
59 return (grid_peek_utf8(gd
, grid_view_x(gd
, px
), grid_view_y(gd
, py
)));
62 /* Get UTF-8 for writing. */
64 grid_view_get_utf8(struct grid
*gd
, u_int px
, u_int py
)
66 return (grid_get_utf8(gd
, grid_view_x(gd
, px
), grid_view_y(gd
, py
)));
72 struct grid
*gd
, u_int px
, u_int py
, const struct grid_utf8
*gu
)
74 grid_set_utf8(gd
, grid_view_x(gd
, px
), grid_view_y(gd
, py
), gu
);
79 grid_view_clear(struct grid
*gd
, u_int px
, u_int py
, u_int nx
, u_int ny
)
81 GRID_DEBUG(gd
, "px=%u, py=%u, nx=%u, ny=%u", px
, py
, nx
, ny
);
83 px
= grid_view_x(gd
, px
);
84 py
= grid_view_y(gd
, py
);
86 grid_clear(gd
, px
, py
, nx
, ny
);
89 /* Scroll region up. */
91 grid_view_scroll_region_up(struct grid
*gd
, u_int rupper
, u_int rlower
)
93 GRID_DEBUG(gd
, "rupper=%u, rlower=%u", rupper
, rlower
);
95 if (gd
->flags
& GRID_HISTORY
) {
96 grid_collect_history(gd
);
97 if (rupper
== 0 && rlower
== gd
->sy
- 1)
98 grid_scroll_history(gd
);
100 rupper
= grid_view_y(gd
, rupper
);
101 rlower
= grid_view_y(gd
, rlower
);
102 grid_scroll_history_region(gd
, rupper
, rlower
);
105 rupper
= grid_view_y(gd
, rupper
);
106 rlower
= grid_view_y(gd
, rlower
);
107 grid_move_lines(gd
, rupper
, rupper
+ 1, rlower
- rupper
);
111 /* Scroll region down. */
113 grid_view_scroll_region_down(struct grid
*gd
, u_int rupper
, u_int rlower
)
115 GRID_DEBUG(gd
, "rupper=%u, rlower=%u", rupper
, rlower
);
117 rupper
= grid_view_y(gd
, rupper
);
118 rlower
= grid_view_y(gd
, rlower
);
120 grid_move_lines(gd
, rupper
+ 1, rupper
, rlower
- rupper
);
125 grid_view_insert_lines(struct grid
*gd
, u_int py
, u_int ny
)
129 GRID_DEBUG(gd
, "py=%u, ny=%u", py
, ny
);
131 py
= grid_view_y(gd
, py
);
133 sy
= grid_view_y(gd
, gd
->sy
);
135 grid_move_lines(gd
, py
+ ny
, py
, sy
- py
- ny
);
138 /* Insert lines in region. */
140 grid_view_insert_lines_region(struct grid
*gd
, u_int rlower
, u_int py
, u_int ny
)
144 GRID_DEBUG(gd
, "rlower=%u, py=%u, ny=%u", rlower
, py
, ny
);
146 rlower
= grid_view_y(gd
, rlower
);
148 py
= grid_view_y(gd
, py
);
150 ny2
= rlower
+ 1 - py
- ny
;
151 grid_move_lines(gd
, rlower
+ 1 - ny2
, py
, ny2
);
152 grid_clear(gd
, 0, py
+ ny2
, gd
->sx
, ny
- ny2
);
157 grid_view_delete_lines(struct grid
*gd
, u_int py
, u_int ny
)
161 GRID_DEBUG(gd
, "py=%u, ny=%u", py
, ny
);
163 py
= grid_view_y(gd
, py
);
165 sy
= grid_view_y(gd
, gd
->sy
);
167 grid_move_lines(gd
, py
, py
+ ny
, sy
- py
- ny
);
168 grid_clear(gd
, 0, sy
- ny
, gd
->sx
, py
+ ny
- (sy
- ny
));
171 /* Delete lines inside scroll region. */
173 grid_view_delete_lines_region(struct grid
*gd
, u_int rlower
, u_int py
, u_int ny
)
177 GRID_DEBUG(gd
, "rlower=%u, py=%u, ny=%u", rlower
, py
, ny
);
179 rlower
= grid_view_y(gd
, rlower
);
181 py
= grid_view_y(gd
, py
);
183 ny2
= rlower
+ 1 - py
- ny
;
184 grid_move_lines(gd
, py
, py
+ ny
, ny2
);
185 grid_clear(gd
, 0, py
+ ny2
, gd
->sx
, ny
- ny2
);
188 /* Insert characters. */
190 grid_view_insert_cells(struct grid
*gd
, u_int px
, u_int py
, u_int nx
)
194 GRID_DEBUG(gd
, "px=%u, py=%u, nx=%u", px
, py
, nx
);
196 px
= grid_view_x(gd
, px
);
197 py
= grid_view_y(gd
, py
);
199 sx
= grid_view_x(gd
, gd
->sx
);
202 grid_clear(gd
, px
, py
, 1, 1);
204 grid_move_cells(gd
, px
+ nx
, px
, py
, sx
- px
- nx
);
207 /* Delete characters. */
209 grid_view_delete_cells(struct grid
*gd
, u_int px
, u_int py
, u_int nx
)
213 GRID_DEBUG(gd
, "px=%u, py=%u, nx=%u", px
, py
, nx
);
215 px
= grid_view_x(gd
, px
);
216 py
= grid_view_y(gd
, py
);
218 sx
= grid_view_x(gd
, gd
->sx
);
220 grid_move_cells(gd
, px
, px
+ nx
, py
, sx
- px
- nx
);
221 grid_clear(gd
, sx
- nx
, py
, px
+ nx
- (sx
- nx
), 1);
224 /* Convert cells into a string. */
226 grid_view_string_cells(struct grid
*gd
, u_int px
, u_int py
, u_int nx
)
228 GRID_DEBUG(gd
, "px=%u, py=%u, nx=%u", px
, py
, nx
);
230 px
= grid_view_x(gd
, px
);
231 py
= grid_view_y(gd
, py
);
233 return (grid_string_cells(gd
, px
, py
, nx
));