1 | #include "owl.h" |
---|
2 | |
---|
3 | #include <assert.h> |
---|
4 | |
---|
5 | struct _owl_window { /*noproto*/ |
---|
6 | /* hierarchy information */ |
---|
7 | owl_window *parent; |
---|
8 | owl_window *child; |
---|
9 | owl_window *next, *prev; |
---|
10 | /* flags */ |
---|
11 | int dirty : 1; |
---|
12 | int dirty_subtree : 1; |
---|
13 | int mapped : 1; |
---|
14 | int is_screen : 1; |
---|
15 | /* window information */ |
---|
16 | WINDOW *win; |
---|
17 | PANEL *pan; |
---|
18 | int nlines, ncols; |
---|
19 | int begin_y, begin_x; |
---|
20 | /* hooks */ |
---|
21 | void (*redraw_cb)(owl_window *, WINDOW *, void *); |
---|
22 | void *redraw_cbdata; |
---|
23 | void (*redraw_cbdata_destroy)(void *); |
---|
24 | |
---|
25 | void (*size_cb)(owl_window *, void *); |
---|
26 | void *size_cbdata; |
---|
27 | void (*size_cbdata_destroy)(void *); |
---|
28 | |
---|
29 | void (*destroy_cb)(owl_window *, void *); |
---|
30 | void *destroy_cbdata; |
---|
31 | void (*destroy_cbdata_destroy)(void *); |
---|
32 | }; |
---|
33 | |
---|
34 | static owl_window *_owl_window_new(owl_window *parent, int nlines, int ncols, int begin_y, int begin_x); |
---|
35 | |
---|
36 | static void _owl_window_unlink(owl_window *w); |
---|
37 | static void _owl_window_link(owl_window *w, owl_window *parent); |
---|
38 | |
---|
39 | static void _owl_window_create_curses(owl_window *w); |
---|
40 | static void _owl_window_destroy_curses(owl_window *w); |
---|
41 | |
---|
42 | static void _owl_window_map_internal(owl_window *w); |
---|
43 | static void _owl_window_unmap_internal(owl_window *w); |
---|
44 | |
---|
45 | /** singletons **/ |
---|
46 | |
---|
47 | static WINDOW *_dummy_window(void) |
---|
48 | { |
---|
49 | static WINDOW *dummy = NULL; |
---|
50 | if (!dummy) { |
---|
51 | dummy = newwin(1, 1, 0, 0); |
---|
52 | } |
---|
53 | return dummy; |
---|
54 | } |
---|
55 | |
---|
56 | static void _screen_calculate_size(owl_window *screen, void *user_data) |
---|
57 | { |
---|
58 | owl_global *g = user_data; |
---|
59 | int lines, cols; |
---|
60 | owl_global_get_terminal_size(&lines, &cols); |
---|
61 | if (!g->lines) g->lines = lines; |
---|
62 | if (!g->cols) g->cols = cols; |
---|
63 | owl_window_resize(screen, g->lines, g->cols); |
---|
64 | } |
---|
65 | |
---|
66 | owl_window *owl_window_get_screen(void) |
---|
67 | { |
---|
68 | static owl_window *screen = NULL; |
---|
69 | if (!screen) { |
---|
70 | /* The screen is magical. It's 'mapped', but the only mean of it going |
---|
71 | * invisible is if we're tore down curses (i.e. screen resize) */ |
---|
72 | screen = _owl_window_new(NULL, g.lines, g.cols, 0, 0); |
---|
73 | screen->is_screen = 1; |
---|
74 | owl_window_set_size_cb(screen, _screen_calculate_size, &g, 0); |
---|
75 | owl_window_map(screen, 0); |
---|
76 | } |
---|
77 | return screen; |
---|
78 | } |
---|
79 | |
---|
80 | /** Creation and Destruction **/ |
---|
81 | |
---|
82 | owl_window *owl_window_new(owl_window *parent) |
---|
83 | { |
---|
84 | if (!parent) |
---|
85 | parent = owl_window_get_screen(); |
---|
86 | return _owl_window_new(parent, 0, 0, 0, 0); |
---|
87 | } |
---|
88 | |
---|
89 | static owl_window *_owl_window_new(owl_window *parent, int nlines, int ncols, int begin_y, int begin_x) |
---|
90 | { |
---|
91 | owl_window *w; |
---|
92 | |
---|
93 | w = owl_malloc(sizeof(owl_window)); |
---|
94 | memset(w, 0, sizeof(*w)); |
---|
95 | |
---|
96 | w->nlines = nlines; |
---|
97 | w->ncols = ncols; |
---|
98 | w->begin_y = begin_y; |
---|
99 | w->begin_x = begin_x; |
---|
100 | |
---|
101 | _owl_window_link(w, parent); |
---|
102 | if (parent && parent->is_screen) { |
---|
103 | w->pan = new_panel(_dummy_window()); |
---|
104 | set_panel_userptr(w->pan, w); |
---|
105 | } |
---|
106 | |
---|
107 | return w; |
---|
108 | } |
---|
109 | |
---|
110 | void owl_window_delete(owl_window *w) |
---|
111 | { |
---|
112 | /* destroy all children */ |
---|
113 | owl_window_children_foreach_onearg(w, owl_window_delete); |
---|
114 | |
---|
115 | /* notify everyone of your imminent demise */ |
---|
116 | if (w->destroy_cb) |
---|
117 | w->destroy_cb(w, w->destroy_cbdata); |
---|
118 | |
---|
119 | /* clear all cbs */ |
---|
120 | owl_window_set_redraw_cb(w, 0, 0, 0); |
---|
121 | owl_window_set_size_cb(w, 0, 0, 0); |
---|
122 | owl_window_set_destroy_cb(w, 0, 0, 0); |
---|
123 | |
---|
124 | /* destroy curses structures */ |
---|
125 | owl_window_unmap(w); |
---|
126 | if (w->pan) { |
---|
127 | del_panel(w->pan); |
---|
128 | } |
---|
129 | |
---|
130 | /* remove from hierarchy */ |
---|
131 | _owl_window_unlink(w); |
---|
132 | owl_free(w); |
---|
133 | } |
---|
134 | |
---|
135 | /** Callbacks **/ |
---|
136 | |
---|
137 | void owl_window_set_redraw_cb(owl_window *w, void (*cb)(owl_window*, WINDOW*, void*), void *cbdata, void (*cbdata_destroy)(void*)) |
---|
138 | { |
---|
139 | if (w->redraw_cbdata_destroy) { |
---|
140 | w->redraw_cbdata_destroy(w->redraw_cbdata); |
---|
141 | w->redraw_cbdata = 0; |
---|
142 | w->redraw_cbdata_destroy = 0; |
---|
143 | } |
---|
144 | |
---|
145 | w->redraw_cb = cb; |
---|
146 | w->redraw_cbdata = cbdata; |
---|
147 | w->redraw_cbdata_destroy = cbdata_destroy; |
---|
148 | |
---|
149 | /* mark the window as dirty, to take new cb in account */ |
---|
150 | owl_window_dirty(w); |
---|
151 | } |
---|
152 | |
---|
153 | void owl_window_set_size_cb(owl_window *w, void (*cb)(owl_window*, void*), void *cbdata, void (*cbdata_destroy)(void*)) |
---|
154 | { |
---|
155 | if (w->size_cbdata_destroy) { |
---|
156 | w->size_cbdata_destroy(w->size_cbdata); |
---|
157 | w->size_cbdata = 0; |
---|
158 | w->size_cbdata_destroy = 0; |
---|
159 | } |
---|
160 | |
---|
161 | w->size_cb = cb; |
---|
162 | w->size_cbdata = cbdata; |
---|
163 | w->size_cbdata_destroy = cbdata_destroy; |
---|
164 | |
---|
165 | owl_window_recompute_position(w); |
---|
166 | } |
---|
167 | |
---|
168 | void owl_window_set_destroy_cb(owl_window *w, void (*cb)(owl_window*, void*), void *cbdata, void (*cbdata_destroy)(void*)) |
---|
169 | { |
---|
170 | if (w->destroy_cbdata_destroy) { |
---|
171 | w->destroy_cbdata_destroy(w->destroy_cbdata); |
---|
172 | w->destroy_cbdata = 0; |
---|
173 | w->destroy_cbdata_destroy = 0; |
---|
174 | } |
---|
175 | |
---|
176 | w->destroy_cb = cb; |
---|
177 | w->destroy_cbdata = cbdata; |
---|
178 | w->destroy_cbdata_destroy = cbdata_destroy; |
---|
179 | } |
---|
180 | |
---|
181 | /** Hierarchy **/ |
---|
182 | |
---|
183 | static void _owl_window_unlink(owl_window *w) |
---|
184 | { |
---|
185 | /* unlink parent/child information */ |
---|
186 | if (w->parent) { |
---|
187 | if (w->prev) |
---|
188 | w->prev->next = w->next; |
---|
189 | if (w->next) |
---|
190 | w->next->prev = w->prev; |
---|
191 | if (w->parent->child == w) |
---|
192 | w->parent->child = w->next; |
---|
193 | } |
---|
194 | w->parent = NULL; |
---|
195 | } |
---|
196 | |
---|
197 | static void _owl_window_link(owl_window *w, owl_window *parent) |
---|
198 | { |
---|
199 | if (w->parent == parent) |
---|
200 | return; |
---|
201 | if (w->parent) |
---|
202 | _owl_window_unlink(w); |
---|
203 | |
---|
204 | w->parent = parent; |
---|
205 | if (parent) { |
---|
206 | w->next = parent->child; |
---|
207 | parent->child = w; |
---|
208 | } |
---|
209 | } |
---|
210 | |
---|
211 | /* mimic g_list_foreach for consistency */ |
---|
212 | void owl_window_children_foreach(owl_window *parent, GFunc func, gpointer user_data) |
---|
213 | { |
---|
214 | owl_window *w; |
---|
215 | for (w = parent->child; |
---|
216 | w != NULL; |
---|
217 | w = w->next) { |
---|
218 | func(w, user_data); |
---|
219 | } |
---|
220 | } |
---|
221 | |
---|
222 | void owl_window_children_foreach_onearg(owl_window *parent, void (*func)(owl_window*)) |
---|
223 | { |
---|
224 | owl_window *w; |
---|
225 | for (w = parent->child; |
---|
226 | w != NULL; |
---|
227 | w = w->next) { |
---|
228 | func(w); |
---|
229 | } |
---|
230 | } |
---|
231 | |
---|
232 | owl_window *owl_window_get_parent(owl_window *w) |
---|
233 | { |
---|
234 | return w->parent; |
---|
235 | } |
---|
236 | |
---|
237 | /** Internal window management **/ |
---|
238 | |
---|
239 | static void _owl_window_create_curses(owl_window *w) |
---|
240 | { |
---|
241 | if (w->is_screen) { |
---|
242 | resizeterm(w->nlines, w->ncols); |
---|
243 | w->win = stdscr; |
---|
244 | } else if (w->pan) { |
---|
245 | w->win = newwin(w->nlines, w->ncols, w->begin_y, w->begin_x); |
---|
246 | replace_panel(w->pan, w->win); |
---|
247 | } else { |
---|
248 | w->win = derwin(w->parent->win, w->nlines, w->ncols, w->begin_y, w->begin_x); |
---|
249 | } |
---|
250 | } |
---|
251 | |
---|
252 | static void _owl_window_destroy_curses(owl_window *w) |
---|
253 | { |
---|
254 | if (w->is_screen) { |
---|
255 | /* don't deallocate the dummy */ |
---|
256 | w->win = NULL; |
---|
257 | } else { |
---|
258 | if (w->pan) { |
---|
259 | /* panels assume their windows always exist, so we put in a fake one */ |
---|
260 | replace_panel(w->pan, _dummy_window()); |
---|
261 | } |
---|
262 | if (w->win) { |
---|
263 | /* and destroy our own window */ |
---|
264 | delwin(w->win); |
---|
265 | w->win = NULL; |
---|
266 | } |
---|
267 | } |
---|
268 | } |
---|
269 | |
---|
270 | static void _map_recurse_curry(owl_window *w) |
---|
271 | { |
---|
272 | owl_window_map(w, 1); |
---|
273 | } |
---|
274 | |
---|
275 | void owl_window_map(owl_window *w, int recurse) |
---|
276 | { |
---|
277 | w->mapped = 1; |
---|
278 | _owl_window_map_internal(w); |
---|
279 | if (w->pan) |
---|
280 | show_panel(w->pan); |
---|
281 | if (recurse) |
---|
282 | owl_window_children_foreach_onearg(w, _map_recurse_curry); |
---|
283 | } |
---|
284 | |
---|
285 | void owl_window_unmap(owl_window *w) |
---|
286 | { |
---|
287 | /* you can't unmap the screen */ |
---|
288 | if (w->is_screen) |
---|
289 | return; |
---|
290 | w->mapped = 0; |
---|
291 | if (w->pan) |
---|
292 | hide_panel(w->pan); |
---|
293 | _owl_window_unmap_internal(w); |
---|
294 | } |
---|
295 | |
---|
296 | int owl_window_is_mapped(owl_window *w) |
---|
297 | { |
---|
298 | return w->mapped; |
---|
299 | } |
---|
300 | |
---|
301 | int owl_window_is_visible(owl_window *w) |
---|
302 | { |
---|
303 | return w->win != NULL; |
---|
304 | } |
---|
305 | |
---|
306 | int owl_window_is_toplevel(owl_window *w) |
---|
307 | { |
---|
308 | return w->pan != NULL; |
---|
309 | } |
---|
310 | |
---|
311 | static void _owl_window_map_internal(owl_window *w) |
---|
312 | { |
---|
313 | /* check if we can create a window */ |
---|
314 | if ((w->parent && w->parent->win == NULL) |
---|
315 | || !w->mapped |
---|
316 | || w->win != NULL) |
---|
317 | return; |
---|
318 | _owl_window_create_curses(w); |
---|
319 | /* schedule a repaint */ |
---|
320 | owl_window_dirty(w); |
---|
321 | /* map the children, unless we failed */ |
---|
322 | if (w->win) |
---|
323 | owl_window_children_foreach_onearg(w, _owl_window_map_internal); |
---|
324 | } |
---|
325 | |
---|
326 | static void _owl_window_unmap_internal(owl_window *w) |
---|
327 | { |
---|
328 | if (w->win == NULL) |
---|
329 | return; |
---|
330 | /* unmap all the children */ |
---|
331 | owl_window_children_foreach_onearg(w, _owl_window_unmap_internal); |
---|
332 | _owl_window_destroy_curses(w); |
---|
333 | /* subwins leave a mess in the parent; dirty it */ |
---|
334 | if (w->parent) |
---|
335 | owl_window_dirty(w->parent); |
---|
336 | } |
---|
337 | |
---|
338 | /** Painting and book-keeping **/ |
---|
339 | |
---|
340 | void owl_window_dirty(owl_window *w) |
---|
341 | { |
---|
342 | /* don't put the screen on this list; pointless */ |
---|
343 | if (w->is_screen) |
---|
344 | return; |
---|
345 | if (!w->dirty) { |
---|
346 | w->dirty = 1; |
---|
347 | while (w && !w->dirty_subtree) { |
---|
348 | w->dirty_subtree = 1; |
---|
349 | w = w->parent; |
---|
350 | } |
---|
351 | owl_global_set_needrefresh(&g); |
---|
352 | } |
---|
353 | } |
---|
354 | |
---|
355 | void owl_window_dirty_children(owl_window *w) |
---|
356 | { |
---|
357 | owl_window_children_foreach_onearg(w, owl_window_dirty); |
---|
358 | } |
---|
359 | |
---|
360 | static void _owl_window_redraw(owl_window *w) |
---|
361 | { |
---|
362 | if (!w->dirty) return; |
---|
363 | if (w->win && w->redraw_cb) { |
---|
364 | w->redraw_cb(w, w->win, w->redraw_cbdata); |
---|
365 | wsyncup(w->win); |
---|
366 | } |
---|
367 | w->dirty = 0; |
---|
368 | } |
---|
369 | |
---|
370 | static void _owl_window_redraw_subtree(owl_window *w) |
---|
371 | { |
---|
372 | if (!w->dirty_subtree) |
---|
373 | return; |
---|
374 | _owl_window_redraw(w); |
---|
375 | owl_window_children_foreach_onearg(w, _owl_window_redraw_subtree); |
---|
376 | } |
---|
377 | |
---|
378 | /* |
---|
379 | Redraw all the windows with scheduled redraws. |
---|
380 | NOTE: This function shouldn't be called outside the event loop |
---|
381 | */ |
---|
382 | void owl_window_redraw_scheduled(void) |
---|
383 | { |
---|
384 | _owl_window_redraw_subtree(owl_window_get_screen()); |
---|
385 | } |
---|
386 | |
---|
387 | void owl_window_erase_cb(owl_window *w, WINDOW *win, void *user_data) |
---|
388 | { |
---|
389 | werase(win); |
---|
390 | owl_window_dirty_children(w); |
---|
391 | } |
---|
392 | |
---|
393 | /** Window position **/ |
---|
394 | |
---|
395 | void owl_window_get_position(owl_window *w, int *nlines, int *ncols, int *begin_y, int *begin_x) |
---|
396 | { |
---|
397 | if (nlines) *nlines = w->nlines; |
---|
398 | if (ncols) *ncols = w->ncols; |
---|
399 | if (begin_y) *begin_y = w->begin_y; |
---|
400 | if (begin_x) *begin_x = w->begin_x; |
---|
401 | } |
---|
402 | |
---|
403 | void owl_window_move(owl_window *w, int begin_y, int begin_x) |
---|
404 | { |
---|
405 | if (w->is_screen) return; /* can't move the screen */ |
---|
406 | if (w->begin_y == begin_y && w->begin_x == begin_x) return; |
---|
407 | |
---|
408 | w->begin_y = begin_y; |
---|
409 | w->begin_x = begin_x; |
---|
410 | if (w->mapped) { |
---|
411 | /* Window is mapped, we must try to have a window at the end */ |
---|
412 | if (w->win) { |
---|
413 | /* We actually do have a window; let's move it */ |
---|
414 | if (w->pan) { |
---|
415 | if (move_panel(w->pan, begin_y, begin_x) == OK) |
---|
416 | return; |
---|
417 | } else { |
---|
418 | if (mvderwin(w->win, begin_y, begin_x) == OK) { |
---|
419 | /* now both we and the parent are dirty */ |
---|
420 | owl_window_dirty(w->parent); |
---|
421 | owl_window_dirty(w); |
---|
422 | return; |
---|
423 | } |
---|
424 | } |
---|
425 | } |
---|
426 | /* We don't have a window or failed to move it. Fine. Brute force. */ |
---|
427 | _owl_window_unmap_internal(w); |
---|
428 | _owl_window_map_internal(w); |
---|
429 | } |
---|
430 | } |
---|
431 | |
---|
432 | void owl_window_set_position(owl_window *w, int nlines, int ncols, int begin_y, int begin_x) |
---|
433 | { |
---|
434 | /* can't move the screen */ |
---|
435 | if (w->is_screen) { |
---|
436 | begin_y = begin_x = 0; |
---|
437 | } |
---|
438 | |
---|
439 | if (w->nlines == nlines && w->ncols == ncols) { |
---|
440 | /* moving is easier */ |
---|
441 | owl_window_move(w, begin_y, begin_x); |
---|
442 | return; |
---|
443 | } |
---|
444 | |
---|
445 | w->begin_y = begin_y; |
---|
446 | w->begin_x = begin_x; |
---|
447 | w->nlines = nlines; |
---|
448 | w->ncols = ncols; |
---|
449 | /* window is mapped, we must try to have a window at the end */ |
---|
450 | if (w->mapped) { |
---|
451 | /* resizing in ncurses is hard: give up do a unmap/map */ |
---|
452 | _owl_window_unmap_internal(w); |
---|
453 | } |
---|
454 | /* recalculate children sizes BEFORE remapping, so that everything can resize */ |
---|
455 | owl_window_children_foreach_onearg(w, owl_window_recompute_position); |
---|
456 | if (w->mapped) { |
---|
457 | _owl_window_map_internal(w); |
---|
458 | } |
---|
459 | } |
---|
460 | |
---|
461 | void owl_window_resize(owl_window *w, int nlines, int ncols) |
---|
462 | { |
---|
463 | owl_window_set_position(w, nlines, ncols, w->begin_y, w->begin_x); |
---|
464 | } |
---|
465 | |
---|
466 | void owl_window_recompute_position(owl_window *w) |
---|
467 | { |
---|
468 | if (w->size_cb) { |
---|
469 | /* TODO: size_cb probably wants to actually take four int*s */ |
---|
470 | w->size_cb(w, w->size_cbdata); |
---|
471 | } |
---|
472 | } |
---|
473 | |
---|
474 | |
---|
475 | /** Stacking order **/ |
---|
476 | |
---|
477 | void owl_window_top(owl_window *w) { |
---|
478 | if (!w->pan) { |
---|
479 | owl_function_debugmsg("Warning: owl_window_top only makes sense on top-level window"); |
---|
480 | return; |
---|
481 | } |
---|
482 | top_panel(w->pan); |
---|
483 | } |
---|
484 | |
---|
485 | owl_window *owl_window_above(owl_window *w) { |
---|
486 | PANEL *pan; |
---|
487 | |
---|
488 | if (!w->pan) { |
---|
489 | owl_function_debugmsg("Warning: owl_window_above only makes sense on top-level window"); |
---|
490 | return NULL; |
---|
491 | } |
---|
492 | pan = panel_above(w->pan); |
---|
493 | /* cast because panel_userptr pointlessly returns a const void * */ |
---|
494 | return pan ? (void*) panel_userptr(pan) : NULL; |
---|
495 | } |
---|
496 | |
---|
497 | owl_window *owl_window_below(owl_window *w) { |
---|
498 | PANEL *pan; |
---|
499 | |
---|
500 | if (!w->pan) { |
---|
501 | owl_function_debugmsg("Warning: owl_window_above only makes sense on top-level window"); |
---|
502 | return NULL; |
---|
503 | } |
---|
504 | pan = panel_below(w->pan); |
---|
505 | /* cast because panel_userptr pointlessly returns a const void * */ |
---|
506 | return pan ? (void*) panel_userptr(pan) : NULL; |
---|
507 | } |
---|