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 /* If w is first window, it goes into the top left corner. */
101 w->start.y = 1; /* Leave space for title bar. */
102 struct Win * w_prev = get_win_before(w->id);
106 /* If not, fit w's top left to top right of last top predecessor. */
107 struct Win * w_top = w_prev;
110 w_top = get_win_before(w_top->id));
111 w->start.x = w_top->start.x + w_top->frame_size.x + 1;
113 /* Fit w's top left to bottom left of its ->prev if enough space. */
114 uint16_t w_prev_maxy = w_prev->start.y + w_prev->frame_size.y;
115 if ( w->frame_size.x <= w_prev->frame_size.x
116 && w->frame_size.y < world.winDB.v_screen_size.y - w_prev_maxy)
118 w->start.x = w_prev->start.x;
119 w->start.y = w_prev_maxy + 1;
123 /* Failing that, try to fit w' top left to the top right of the last
124 * predecessor w_test 1) not followed by windows with a left corner
125 * further rightwards than its own 2) with enough space rightwards for w
126 * until the bottom right of w_thr directly throning over it 3) and with
127 * this same space extending far enough to the bottom for fitting in w.
129 struct Win * w_test = w_prev;
131 while (w_test != w_top)
133 for (w_thr = get_win_before(w_test->id);
134 w_test->start.y <= w_thr->start.y;
135 w_thr = get_win_before(w_thr->id));
136 uint16_t w_thr_bottom = w_thr->start.y + w_thr->frame_size.y;
137 uint16_t free_width = (w_thr->start.x + w_thr->frame_size.x)
138 - (w_test->start.x + w_test->frame_size.x);
139 if ( w->frame_size.y < world.winDB.v_screen_size.y - w_thr_bottom
140 && w->frame_size.x < free_width)
142 w->start.x = w_test->start.x + w_test->frame_size.x + 1;
143 w->start.y = w_thr_bottom + 1;
153 static void set_win_target_size(struct Win * w)
155 if (0 == w->target_height_type)
157 w->target_height = w->frame_size.y;
159 else if (1 == w->target_height_type)
161 w->target_height = w->frame_size.y - world.winDB.v_screen_size.y +1;
163 if (0 == w->target_width_type)
165 w->target_width = w->frame_size.x;
167 else if (1 == w->target_width_type)
169 w->target_width = w->frame_size.x - world.winDB.v_screen_size.x;
175 static void append_win(struct Win * w)
177 char * f_name = "append_win()";
178 uint8_t old_size = strlen(world.winDB.order) + 1;
179 char * new_order = try_malloc(old_size + 1, f_name);
180 memcpy(new_order, world.winDB.order, old_size - 1);
181 new_order[old_size - 1] = w->id;
182 new_order[old_size] = '\0';
183 free(world.winDB.order);
184 world.winDB.order = new_order;
185 world.winDB.active = w->id;
191 static void suspend_win(struct Win * w)
193 char * f_name = "suspend_win()";
194 uint8_t new_size = strlen(world.winDB.order);
195 char * new_order = try_malloc(new_size, f_name);
196 uint8_t i = get_win_pos_in_order(w->id);
197 char next_char = world.winDB.order[i + 1];
198 world.winDB.order[i] = '\0';
199 char * second_part = &world.winDB.order[i + 1];
200 sprintf(new_order, "%s%s", world.winDB.order, second_part);
201 free(world.winDB.order);
202 world.winDB.order = new_order;
203 world.winDB.active = world.winDB.order[i];
204 if (!world.winDB.order[i] && 0 < i)
206 world.winDB.active = world.winDB.order[i - 1];
208 if (world.winDB.order[i])
210 update_wins(get_win_by_id(next_char)); /* Already calls */
211 return; /* refit_v_screen(), so leave. */
218 extern void toggle_window(char id)
220 struct Win * win = get_win_by_id(id);
221 if (NULL == strchr(world.winDB.order, id))
231 extern void toggle_winconfig()
233 if (!world.winDB.active)
237 struct Win * w = get_win_by_id(world.winDB.active);
241 w->target_center = w->center;
242 memset(&w->center, 0, sizeof(struct yx_uint16));
245 else if (1 == w->view)
252 w->center = w->target_center;
257 extern void toggle_win_size_type(char axis)
259 struct Win * w = get_win_by_id(world.winDB.active);
262 w->target_height_type = (0 == w->target_height_type);
263 set_win_target_size(w);
266 w->target_width_type = ( 0 == w->target_width_type
267 && w->frame_size.x <= world.winDB.v_screen_size.x);
268 set_win_target_size(w);
273 extern void toggle_linebreak_type()
275 struct Win * w = get_win_by_id(world.winDB.active);
276 if (0 == w->linebreak)
280 else if (1 == w->linebreak)
284 else if (2 == w->linebreak)
292 extern void resize_active_win(char change)
294 if (world.winDB.active)
296 struct Win * w = get_win_by_id(world.winDB.active);
297 if (change == '-' && w->frame_size.y > 1)
301 else if (change == '_' && w->frame_size.x > 1)
305 else if ( change == '+'
306 && w->frame_size.y < world.winDB.v_screen_size.y - 1)
310 else if (change == '*' && w->frame_size.y < UINT16_MAX)
314 if ( 1 == w->target_width_type
315 && w->frame_size.x > world.winDB.v_screen_size.x)
317 w->target_width_type = 0;
319 set_win_target_size(w);
326 extern void shift_active_win(char dir)
328 uint8_t len_order = strlen(world.winDB.order);
331 char tmp[len_order + 1];
332 tmp[len_order] = '\0';
333 uint8_t pos = get_win_pos_in_order(world.winDB.active);
336 if (pos == len_order - 1)
338 memcpy(tmp + 1, world.winDB.order, len_order - 1);
339 tmp[0] = world.winDB.active;
340 memcpy(world.winDB.order, tmp, len_order + 1);
344 world.winDB.order[pos] = world.winDB.order[pos + 1];
345 world.winDB.order[pos + 1] = world.winDB.active;
352 memcpy(tmp, world.winDB.order + 1, len_order - 1);
353 tmp[len_order - 1] = world.winDB.active;
354 memcpy(world.winDB.order, tmp, len_order + 1);
358 world.winDB.order[pos] = world.winDB.order[pos - 1];
359 world.winDB.order[pos - 1] = world.winDB.active;
362 update_wins(get_win_by_id(world.winDB.order[0]));
368 extern void scroll_v_screen(char dir)
371 && world.winDB.v_screen_offset + world.winDB.v_screen_size.x + 1
372 < getmaxx(world.winDB.v_screen))
374 world.winDB.v_screen_offset++;
377 && world.winDB.v_screen_offset > 0)
379 world.winDB.v_screen_offset--;
385 extern void cycle_active_win(char dir)
387 uint8_t len_order = strlen(world.winDB.order);
390 uint8_t pos = get_win_pos_in_order(world.winDB.active);
393 world.winDB.active = world.winDB.order[pos + 1];
394 if ('\0' == world.winDB.active)
396 world.winDB.active = world.winDB.order[0];
402 world.winDB.active = world.winDB.order[pos - 1];
405 world.winDB.active = world.winDB.order[len_order - 1];