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 "windows.h" /* Win,yx_uint16, get_win_by_id(),get_win_pos_in_order() */
13 #include "world.h" /* global world */
17 /* Get Win before window identified by "c" or NULL if there is none. */
18 static struct Win * get_win_before(char c);
20 /* Make .v_screen just wide enough to contain all visible windows. */
21 static void refit_v_screen();
23 /* Update geometry (sizes, positions) of window "w" and its successors in the
24 * window chain. Use place_win() for the positioning algorithm.
26 static void update_wins(struct Win * w);
27 static void place_win(struct Win * w);
29 /* Write "win"'s size back to .target_(height/width) as per .target_*_type. */
30 static void set_win_target_size(struct Win * win);
32 /* Append/suspend window "w" to/from chain of visible windows. Appended windows
33 * will become active. Suspended active windows will move the active window
34 * selection to their successor in the window chain or, failing that, their
35 * predecessor, or, failing that, to 0 (no window active).
37 static void append_win(struct Win * w);
38 static void suspend_win(struct Win * w);
42 extern struct Win * get_win_before(char c)
44 uint8_t i = get_win_pos_in_order(c);
47 return get_win_by_id(world.winDB.order[i - 1]);
54 static void refit_v_screen()
56 /* Determine rightmost window column. */
57 uint32_t lastwcol = 0;
58 struct Win * wp = get_win_by_id(world.winDB.order[0]);
61 if ((uint32_t) wp->start.x + (uint32_t) wp->frame_size.x > lastwcol + 1)
63 lastwcol = (uint32_t) wp->start.x + (uint32_t) wp->frame_size.x - 1;
65 wp = get_win_after(wp->id);
68 /* Only resize .v_screen if the rightmost window column has changed. */
69 char * err_s = "refit_v_screen() grows virtual screen beyond legal sizes.";
70 char * err_m = "refit_v_screen() triggers memory alloc error in wresize().";
71 if ((uint32_t) getmaxx(world.winDB.v_screen) + 1 != lastwcol)
73 uint8_t t = (lastwcol + 2 > UINT16_MAX);
75 t = wresize(world.winDB.v_screen, getmaxy(world.winDB.v_screen),
83 static void update_wins(struct Win * w)
87 struct Win * next = get_win_after(w->id);
96 static void place_win(struct Win * w)
98 uint8_t sep = 1; /* Width of inter-window borders and title bars. */
100 /* If w is first window, it goes into the top left corner. */
102 w->start.y = 0 + sep;
103 struct Win * w_prev = get_win_before(w->id);
107 /* If not, get w's next predecessor starting a new stack on the screen
108 * top, fit w's top left corner to that predecessor's top right corner.
110 struct Win * w_top = w_prev;
111 for (; w_top->start.y != 0 + sep; w_top = get_win_before(w_top->id));
112 w->start.x = w_top->start.x + w_top->frame_size.x + sep;
114 /* If enough space is found below w's predecessor, fit w's top left
115 * corner to that predecessor's bottom left corner.
117 uint16_t next_free_y = w_prev->start.y + w_prev->frame_size.y + sep;
118 if ( w->frame_size.x <= w_prev->frame_size.x
119 && w->frame_size.y <= world.winDB.v_screen_size.y - next_free_y)
121 w->start.x = w_prev->start.x;
122 w->start.y = next_free_y;
126 /* If that fails, try to fit w's top left corner to the top right corner
127 * of its next predecessor w_test 1) below w_top (w's next predecessor
128 * starting a new stack on the screen top) 2) and the most rightward
129 * lower neighbor of a window w_high, itself throning over enough free
130 * space for w to fit below it, rightwards of its lower neighbor w_test.
132 struct Win * w_test = w_prev;
134 while (w_test != w_top)
136 for (w_high = get_win_before(w_test->id); /* Walk down chain */
137 w_test->start.y <= w_high->start.y; /* until w_high starts */
138 w_high = get_win_before(w_high->id)); /* higher than w_test. */
139 next_free_y = w_high->start.y + w_high->frame_size.y + sep;
140 uint16_t first_free_x = w_test->start.x + w_test->frame_size.x +sep;
141 uint16_t last_free_x = w_high->start.x + w_high->frame_size.x;
142 if ( w->frame_size.y <= world.winDB.v_screen_size.y - next_free_y
143 && w->frame_size.x <= last_free_x - first_free_x)
145 w->start.x = first_free_x;
146 w->start.y = next_free_y;
156 static void set_win_target_size(struct Win * w)
158 if (0 == w->target_height_type)
160 w->target_height = w->frame_size.y;
162 else if (1 == w->target_height_type)
164 w->target_height = w->frame_size.y - world.winDB.v_screen_size.y +1;
166 if (0 == w->target_width_type)
168 w->target_width = w->frame_size.x;
170 else if (1 == w->target_width_type)
172 w->target_width = w->frame_size.x - world.winDB.v_screen_size.x;
178 static void append_win(struct Win * w)
180 char * f_name = "append_win()";
181 uint8_t old_size = strlen(world.winDB.order) + 1;
182 char * new_order = try_malloc(old_size + 1, f_name);
183 memcpy(new_order, world.winDB.order, old_size - 1);
184 new_order[old_size - 1] = w->id;
185 new_order[old_size] = '\0';
186 free(world.winDB.order);
187 world.winDB.order = new_order;
188 world.winDB.active = w->id;
194 static void suspend_win(struct Win * w)
196 char * f_name = "suspend_win()";
197 uint8_t new_size = strlen(world.winDB.order);
198 char * new_order = try_malloc(new_size, f_name);
199 uint8_t i = get_win_pos_in_order(w->id);
200 char next_char = world.winDB.order[i + 1];
201 world.winDB.order[i] = '\0';
202 char * second_part = &world.winDB.order[i + 1];
203 sprintf(new_order, "%s%s", world.winDB.order, second_part);
204 free(world.winDB.order);
205 world.winDB.order = new_order;
206 world.winDB.active = world.winDB.order[i];
207 if (!world.winDB.order[i] && 0 < i)
209 world.winDB.active = world.winDB.order[i - 1];
211 if (world.winDB.order[i])
213 update_wins(get_win_by_id(next_char)); /* Already calls */
214 return; /* refit_v_screen(), so leave. */
221 extern void toggle_window(char id)
223 struct Win * win = get_win_by_id(id);
224 if (NULL == strchr(world.winDB.order, id))
234 extern void toggle_winconfig()
236 if (!world.winDB.active)
240 struct Win * w = get_win_by_id(world.winDB.active);
244 w->target_center = w->center;
245 memset(&w->center, 0, sizeof(struct yx_uint16));
248 else if (1 == w->view)
255 w->center = w->target_center;
260 extern void toggle_win_size_type(char axis)
262 struct Win * w = get_win_by_id(world.winDB.active);
265 w->target_height_type = (0 == w->target_height_type);
266 set_win_target_size(w);
269 w->target_width_type = ( 0 == w->target_width_type
270 && w->frame_size.x <= world.winDB.v_screen_size.x);
271 set_win_target_size(w);
276 extern void toggle_linebreak_type()
278 struct Win * w = get_win_by_id(world.winDB.active);
279 if (0 == w->linebreak)
283 else if (1 == w->linebreak)
287 else if (2 == w->linebreak)
295 extern void resize_active_win(char change)
297 if (world.winDB.active)
299 struct Win * w = get_win_by_id(world.winDB.active);
300 if (change == '-' && w->frame_size.y > 1)
304 else if (change == '_' && w->frame_size.x > 1)
308 else if ( change == '+'
309 && w->frame_size.y < world.winDB.v_screen_size.y - 1)
313 else if (change == '*' && w->frame_size.y < UINT16_MAX)
317 if ( 1 == w->target_width_type
318 && w->frame_size.x > world.winDB.v_screen_size.x)
320 w->target_width_type = 0;
322 set_win_target_size(w);
329 extern void shift_active_win(char dir)
331 uint8_t len_order = strlen(world.winDB.order);
334 char tmp[len_order + 1];
335 tmp[len_order] = '\0';
336 uint8_t pos = get_win_pos_in_order(world.winDB.active);
339 if (pos == len_order - 1)
341 memcpy(tmp + 1, world.winDB.order, len_order - 1);
342 tmp[0] = world.winDB.active;
343 memcpy(world.winDB.order, tmp, len_order + 1);
347 world.winDB.order[pos] = world.winDB.order[pos + 1];
348 world.winDB.order[pos + 1] = world.winDB.active;
355 memcpy(tmp, world.winDB.order + 1, len_order - 1);
356 tmp[len_order - 1] = world.winDB.active;
357 memcpy(world.winDB.order, tmp, len_order + 1);
361 world.winDB.order[pos] = world.winDB.order[pos - 1];
362 world.winDB.order[pos - 1] = world.winDB.active;
365 update_wins(get_win_by_id(world.winDB.order[0]));
371 extern void scroll_v_screen(char dir)
374 && world.winDB.v_screen_offset + world.winDB.v_screen_size.x + 1
375 < getmaxx(world.winDB.v_screen))
377 world.winDB.v_screen_offset++;
380 && world.winDB.v_screen_offset > 0)
382 world.winDB.v_screen_offset--;
388 extern void cycle_active_win(char dir)
390 uint8_t len_order = strlen(world.winDB.order);
393 uint8_t pos = get_win_pos_in_order(world.winDB.active);
396 world.winDB.active = world.winDB.order[pos + 1];
397 if ('\0' == world.winDB.active)
399 world.winDB.active = world.winDB.order[0];
405 world.winDB.active = world.winDB.order[pos - 1];
408 world.winDB.active = world.winDB.order[len_order - 1];