1 /* src/client/wincontrol.c */
3 #include "wincontrol.h"
4 #include <ncurses.h> /* getmaxx(), getmaxy(), wresize() */
5 #include <stddef.h> /* NULL */
6 #include <stdint.h> /* uint8_t, uint32_t, UINT16_MAX */
7 #include <stdio.h> /* sprintf() */
8 #include <stdlib.h> /* free() */
9 #include <string.h> /* memcpy(), memset(), strchr(), strlen() */
10 #include "../common/rexit.h" /* exit_err() */
11 #include "../common/try_malloc.h" /* try_malloc() */
12 #include "../common/yx_uint16.h" /* struct yx_uint16 */
13 #include "windows.h" /* struct Win, get_win_by_id(), get_win_pos_in_order() */
14 #include "world.h" /* global world */
18 /* Get Win before window identified by "c" or NULL if there is none. */
19 static struct Win * get_win_before(char c);
21 /* Make .v_screen just wide enough to contain all visible windows. */
22 static void refit_v_screen();
24 /* Update geometry (sizes, positions) of window "w" and its successors in the
25 * window chain. Use place_win() for the positioning algorithm.
27 static void update_wins(struct Win * w);
28 static void place_win(struct Win * w);
30 /* Write "win"'s size back to .target_(height/width) as per .target_*_type. */
31 static void set_win_target_size(struct Win * win);
33 /* Append/suspend window "w" to/from chain of visible windows. Appended windows
34 * will become active. Suspended active windows will move the active window
35 * selection to their successor in the window chain or, failing that, their
36 * predecessor, or, failing that, to 0 (no window active).
38 static void append_win(struct Win * w);
39 static void suspend_win(struct Win * w);
43 extern struct Win * get_win_before(char c)
45 uint8_t i = get_win_pos_in_order(c);
48 return get_win_by_id(world.winDB.order[i - 1]);
55 static void refit_v_screen()
57 /* Determine rightmost window column. */
58 uint32_t lastwcol = 0;
59 struct Win * wp = get_win_by_id(world.winDB.order[0]);
62 if ((uint32_t) wp->start.x + (uint32_t) wp->frame_size.x > lastwcol + 1)
64 lastwcol = (uint32_t) wp->start.x + (uint32_t) wp->frame_size.x - 1;
66 wp = get_win_after(wp->id);
69 /* Only resize .v_screen if the rightmost window column has changed. */
70 char * err_s = "refit_v_screen() grows virtual screen beyond legal sizes.";
71 char * err_m = "refit_v_screen() triggers memory alloc error in wresize().";
72 if ((uint32_t) getmaxx(world.winDB.v_screen) + 1 != lastwcol)
74 uint8_t t = (lastwcol + 2 > UINT16_MAX);
76 t = wresize(world.winDB.v_screen, getmaxy(world.winDB.v_screen),
84 static void update_wins(struct Win * w)
88 struct Win * next = get_win_after(w->id);
97 static void place_win(struct Win * w)
99 uint8_t sep = 1; /* Width of inter-window borders and title bars. */
101 /* If w is first window, it goes into the top left corner. */
103 w->start.y = 0 + sep;
104 struct Win * w_prev = get_win_before(w->id);
108 /* If not, get w's next predecessor starting a new stack on the screen
109 * top, fit w's top left corner to that predecessor's top right corner.
111 struct Win * w_top = w_prev;
113 w_top->start.y != 0 + sep;
114 w_top = get_win_before(w_top->id));
115 w->start.x = w_top->start.x + w_top->frame_size.x + sep;
117 /* If enough space is found below w's predecessor, fit w's top left
118 * corner to that predecessor's bottom left corner.
120 uint16_t next_free_y = w_prev->start.y + w_prev->frame_size.y + sep;
121 if ( w->frame_size.x <= w_prev->frame_size.x
122 && w->frame_size.y <= world.winDB.v_screen_size.y - next_free_y)
124 w->start.x = w_prev->start.x;
125 w->start.y = next_free_y;
129 /* If that fails, try to fit w's top left corner to the top right corner
130 * of its next predecessor w_test 1) below w_top (w's next predecessor
131 * starting a new stack on the screen top) 2) and the most rightward
132 * lower neighbor of a window w_high, itself throning over enough free
133 * space for w to fit below it, rightwards of its lower neighbor w_test.
135 struct Win * w_test = w_prev;
137 while (w_test != w_top)
139 for (w_high = get_win_before(w_test->id); /* Walk down chain */
140 w_test->start.y <= w_high->start.y; /* until w_high starts */
141 w_high = get_win_before(w_high->id)); /* higher than w_test. */
142 next_free_y = w_high->start.y + w_high->frame_size.y + sep;
143 uint16_t first_free_x = w_test->start.x + w_test->frame_size.x +sep;
144 uint16_t last_free_x = w_high->start.x + w_high->frame_size.x;
145 if ( w->frame_size.y <= world.winDB.v_screen_size.y - next_free_y
146 && w->frame_size.x <= last_free_x - first_free_x)
148 w->start.x = first_free_x;
149 w->start.y = next_free_y;
159 static void set_win_target_size(struct Win * w)
161 if (0 == w->target_height_type)
163 w->target_height = w->frame_size.y;
165 else if (1 == w->target_height_type)
167 w->target_height = w->frame_size.y - world.winDB.v_screen_size.y +1;
169 if (0 == w->target_width_type)
171 w->target_width = w->frame_size.x;
173 else if (1 == w->target_width_type)
175 w->target_width = w->frame_size.x - world.winDB.v_screen_size.x;
181 static void append_win(struct Win * w)
183 char * f_name = "append_win()";
184 uint8_t old_size = strlen(world.winDB.order) + 1;
185 char * new_order = try_malloc(old_size + 1, f_name);
186 memcpy(new_order, world.winDB.order, old_size - 1);
187 new_order[old_size - 1] = w->id;
188 new_order[old_size] = '\0';
189 free(world.winDB.order);
190 world.winDB.order = new_order;
191 world.winDB.active = w->id;
197 static void suspend_win(struct Win * w)
199 char * f_name = "suspend_win()";
200 uint8_t new_size = strlen(world.winDB.order);
201 char * new_order = try_malloc(new_size, f_name);
202 uint8_t i = get_win_pos_in_order(w->id);
203 char next_char = world.winDB.order[i + 1];
204 world.winDB.order[i] = '\0';
205 char * second_part = &world.winDB.order[i + 1];
206 sprintf(new_order, "%s%s", world.winDB.order, second_part);
207 free(world.winDB.order);
208 world.winDB.order = new_order;
209 world.winDB.active = world.winDB.order[i];
210 if (!world.winDB.order[i] && 0 < i)
212 world.winDB.active = world.winDB.order[i - 1];
214 if (world.winDB.order[i])
216 update_wins(get_win_by_id(next_char)); /* Already calls */
217 return; /* refit_v_screen(), so leave. */
224 extern void toggle_window(char id)
226 struct Win * win = get_win_by_id(id);
227 if (NULL == strchr(world.winDB.order, id))
237 extern void toggle_winconfig()
239 if (!world.winDB.active)
243 struct Win * w = get_win_by_id(world.winDB.active);
247 w->target_center = w->center;
248 memset(&w->center, 0, sizeof(struct yx_uint16));
251 else if (1 == w->view)
258 w->center = w->target_center;
263 extern void toggle_win_size_type(char axis)
265 struct Win * w = get_win_by_id(world.winDB.active);
268 w->target_height_type = (0 == w->target_height_type);
269 set_win_target_size(w);
272 w->target_width_type = ( 0 == w->target_width_type
273 && w->frame_size.x <= world.winDB.v_screen_size.x);
274 set_win_target_size(w);
279 extern void toggle_linebreak_type()
281 struct Win * w = get_win_by_id(world.winDB.active);
282 if (0 == w->linebreak)
286 else if (1 == w->linebreak)
290 else if (2 == w->linebreak)
298 extern void resize_active_win(char change)
300 if (world.winDB.active)
302 struct Win * w = get_win_by_id(world.winDB.active);
303 if (change == '-' && w->frame_size.y > 1)
307 else if (change == '_' && w->frame_size.x > 1)
311 else if ( change == '+'
312 && w->frame_size.y < world.winDB.v_screen_size.y - 1)
316 else if (change == '*' && w->frame_size.y < UINT16_MAX)
320 if ( 1 == w->target_width_type
321 && w->frame_size.x > world.winDB.v_screen_size.x)
323 w->target_width_type = 0;
325 set_win_target_size(w);
332 extern void shift_active_win(char dir)
334 uint8_t len_order = strlen(world.winDB.order);
337 char tmp[len_order + 1];
338 tmp[len_order] = '\0';
339 uint8_t pos = get_win_pos_in_order(world.winDB.active);
342 if (pos == len_order - 1)
344 memcpy(tmp + 1, world.winDB.order, len_order - 1);
345 tmp[0] = world.winDB.active;
346 memcpy(world.winDB.order, tmp, len_order + 1);
350 world.winDB.order[pos] = world.winDB.order[pos + 1];
351 world.winDB.order[pos + 1] = world.winDB.active;
358 memcpy(tmp, world.winDB.order + 1, len_order - 1);
359 tmp[len_order - 1] = world.winDB.active;
360 memcpy(world.winDB.order, tmp, len_order + 1);
364 world.winDB.order[pos] = world.winDB.order[pos - 1];
365 world.winDB.order[pos - 1] = world.winDB.active;
368 update_wins(get_win_by_id(world.winDB.order[0]));
374 extern void scroll_v_screen(char dir)
377 && world.winDB.v_screen_offset + world.winDB.v_screen_size.x + 1
378 < getmaxx(world.winDB.v_screen))
380 world.winDB.v_screen_offset++;
383 && world.winDB.v_screen_offset > 0)
385 world.winDB.v_screen_offset--;
391 extern void cycle_active_win(char dir)
393 uint8_t len_order = strlen(world.winDB.order);
396 uint8_t pos = get_win_pos_in_order(world.winDB.active);
399 world.winDB.active = world.winDB.order[pos + 1];
400 if ('\0' == world.winDB.active)
402 world.winDB.active = world.winDB.order[0];
408 world.winDB.active = world.winDB.order[pos - 1];
411 world.winDB.active = world.winDB.order[len_order - 1];