source: trunk/ncurses/menu/m_global.c@ 2996

Last change on this file since 2996 was 2621, checked in by bird, 20 years ago

GNU ncurses 5.5
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1/****************************************************************************
2 * Copyright (c) 1998-2004,2005 Free Software Foundation, Inc. *
3 * *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
11 * *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
14 * *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
22 * *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
26 * authorization. *
27 ****************************************************************************/
28
29/****************************************************************************
30 * Author: Juergen Pfeifer, 1995,1997 *
31 ****************************************************************************/
32
33/***************************************************************************
34* Module m_global *
35* Globally used internal routines and the default menu and item structures *
36***************************************************************************/
37
38#include "menu.priv.h"
39
40MODULE_ID("$Id: m_global.c,v 1.20 2005/04/16 17:30:57 tom Exp $")
41
42static char mark[] = "-";
43/* *INDENT-OFF* */
44NCURSES_EXPORT_VAR(MENU) _nc_Default_Menu = {
45 16, /* Nr. of chars high */
46 1, /* Nr. of chars wide */
47 16, /* Nr. of items high */
48 1, /* Nr. of items wide */
49 16, /* Nr. of formatted items high */
50 1, /* Nr. of formatted items wide */
51 16, /* Nr. of items high (actual) */
52 0, /* length of widest name */
53 0, /* length of widest description */
54 1, /* length of mark */
55 1, /* length of one item */
56 1, /* Spacing for descriptor */
57 1, /* Spacing for columns */
58 1, /* Spacing for rows */
59 (char *)0, /* buffer used to store match chars */
60 0, /* Index into pattern buffer */
61 (WINDOW *)0, /* Window containing entire menu */
62 (WINDOW *)0, /* Portion of menu displayed */
63 (WINDOW *)0, /* User's window */
64 (WINDOW *)0, /* User's subwindow */
65 (ITEM **)0, /* List of items */
66 0, /* Total Nr. of items in menu */
67 (ITEM *)0, /* Current item */
68 0, /* Top row of menu */
69 (chtype)A_REVERSE, /* Attribute for selection */
70 (chtype)A_NORMAL, /* Attribute for nonselection */
71 (chtype)A_UNDERLINE, /* Attribute for inactive */
72 ' ', /* Pad character */
73 (Menu_Hook)0, /* Menu init */
74 (Menu_Hook)0, /* Menu term */
75 (Menu_Hook)0, /* Item init */
76 (Menu_Hook)0, /* Item term */
77 (void *)0, /* userptr */
78 mark, /* mark */
79 ALL_MENU_OPTS, /* options */
80 0 /* status */
81};
82
83NCURSES_EXPORT_VAR(ITEM) _nc_Default_Item = {
84 { (char *)0, 0 }, /* name */
85 { (char *)0, 0 }, /* description */
86 (MENU *)0, /* Pointer to parent menu */
87 (char *)0, /* Userpointer */
88 ALL_ITEM_OPTS, /* options */
89 0, /* Item Nr. */
90 0, /* y */
91 0, /* x */
92 FALSE, /* value */
93 (ITEM *)0, /* left */
94 (ITEM *)0, /* right */
95 (ITEM *)0, /* up */
96 (ITEM *)0 /* down */
97 };
98/* *INDENT-ON* */
99
100/*---------------------------------------------------------------------------
101| Facility : libnmenu
102| Function : static void ComputeMaximum_NameDesc_Lenths(MENU *menu)
103|
104| Description : Calculates the maximum name and description lengths
105| of the items connected to the menu
106|
107| Return Values : -
108+--------------------------------------------------------------------------*/
109INLINE static void
110ComputeMaximum_NameDesc_Lengths(MENU * menu)
111{
112 unsigned MaximumNameLength = 0;
113 unsigned MaximumDescriptionLength = 0;
114 ITEM **items;
115
116 assert(menu && menu->items);
117 for (items = menu->items; *items; items++)
118 {
119 if (items[0]->name.length > MaximumNameLength)
120 MaximumNameLength = items[0]->name.length;
121
122 if (items[0]->description.length > MaximumDescriptionLength)
123 MaximumDescriptionLength = items[0]->description.length;
124 }
125
126 menu->namelen = MaximumNameLength;
127 menu->desclen = MaximumDescriptionLength;
128 T(("ComputeMaximum_NameDesc_Lengths %d,%d", menu->namelen, menu->desclen));
129}
130
131/*---------------------------------------------------------------------------
132| Facility : libnmenu
133| Function : static void ResetConnectionInfo(MENU *, ITEM **)
134|
135| Description : Reset all informations in the menu and the items in
136| the item array that indicates a connection
137|
138| Return Values : -
139+--------------------------------------------------------------------------*/
140INLINE static void
141ResetConnectionInfo(MENU * menu, ITEM ** items)
142{
143 ITEM **item;
144
145 assert(menu && items);
146 for (item = items; *item; item++)
147 {
148 (*item)->index = 0;
149 (*item)->imenu = (MENU *) 0;
150 }
151 if (menu->pattern)
152 free(menu->pattern);
153 menu->pattern = (char *)0;
154 menu->pindex = 0;
155 menu->items = (ITEM **) 0;
156 menu->nitems = 0;
157}
158
159/*---------------------------------------------------------------------------
160| Facility : libnmenu
161| Function : bool _nc_Connect_Items(MENU *menu, ITEM **items)
162|
163| Description : Connect the items in the item array to the menu.
164| Decorate all the items with a number and a backward
165| pointer to the menu.
166|
167| Return Values : TRUE - successful connection
168| FALSE - connection failed
169+--------------------------------------------------------------------------*/
170NCURSES_EXPORT(bool)
171_nc_Connect_Items(MENU * menu, ITEM ** items)
172{
173 ITEM **item;
174 unsigned int ItemCount = 0;
175
176 if (menu && items)
177 {
178 for (item = items; *item; item++)
179 {
180 if ((*item)->imenu)
181 {
182 /* if a item is already connected, reject connection */
183 break;
184 }
185 }
186 if (!(*item))
187 /* we reached the end, so there was no connected item */
188 {
189 for (item = items; *item; item++)
190 {
191 if (menu->opt & O_ONEVALUE)
192 {
193 (*item)->value = FALSE;
194 }
195 (*item)->index = ItemCount++;
196 (*item)->imenu = menu;
197 }
198 }
199 }
200 else
201 return (FALSE);
202
203 if (ItemCount != 0)
204 {
205 menu->items = items;
206 menu->nitems = ItemCount;
207 ComputeMaximum_NameDesc_Lengths(menu);
208 if ((menu->pattern = typeMalloc(char, (unsigned)(1 + menu->namelen))))
209 {
210 Reset_Pattern(menu);
211 set_menu_format(menu, menu->frows, menu->fcols);
212 menu->curitem = *items;
213 menu->toprow = 0;
214 return (TRUE);
215 }
216 }
217
218 /* If we fall through to this point, we have to reset all items connection
219 and inform about a reject connection */
220 ResetConnectionInfo(menu, items);
221 return (FALSE);
222}
223
224/*---------------------------------------------------------------------------
225| Facility : libnmenu
226| Function : void _nc_Disconnect_Items(MENU *menu)
227|
228| Description : Disconnect the menus item array from the menu
229|
230| Return Values : -
231+--------------------------------------------------------------------------*/
232NCURSES_EXPORT(void)
233_nc_Disconnect_Items(MENU * menu)
234{
235 if (menu && menu->items)
236 ResetConnectionInfo(menu, menu->items);
237}
238
239/*---------------------------------------------------------------------------
240| Facility : libnmenu
241| Function : int _nc_Calculate_Text_Width(const TEXT * item)
242|
243| Description : Calculate the number of columns for a TEXT.
244|
245| Return Values : the width
246+--------------------------------------------------------------------------*/
247NCURSES_EXPORT(int)
248_nc_Calculate_Text_Width(const TEXT * item /*FIXME: limit length */ )
249{
250#if USE_WIDEC_SUPPORT
251 int result = item->length;
252 int count = mbstowcs(0, item->str, 0);
253 wchar_t *temp = 0;
254
255 T((T_CALLED("_nc_menu_text_width(%p)"), item));
256 if (count > 0
257 && (temp = typeMalloc(wchar_t, 2 + count)) != 0)
258 {
259 int n;
260
261 result = 0;
262 mbstowcs(temp, item->str, (unsigned)count);
263 for (n = 0; n < count; ++n)
264 {
265 int test = wcwidth(temp[n]);
266
267 if (test <= 0)
268 test = 1;
269 result += test;
270 }
271 free(temp);
272 }
273 returnCode(result);
274#else
275 return item->length;
276#endif
277}
278
279/* FIXME: this is experimental, should cache the results but don't want to
280 * modify the MENU struct to do this until it's complete.
281 */
282#if 0 /* USE_WIDEC_SUPPORT */
283static int
284calculate_actual_width(MENU * menu, bool name)
285{
286 int width = 0;
287 int check = 0;
288 ITEM **items;
289
290 assert(menu && menu->items);
291 for (items = menu->items; *items; items++)
292 {
293 if (name)
294 {
295 check = _nc_Calculate_Text_Width(&((*items)->name));
296 }
297 else
298 {
299 check = _nc_Calculate_Text_Width(&((*items)->description));
300 }
301 if (check > width)
302 width = check;
303 }
304
305 T(("calculate_actual_width %s = %d/%d",
306 name ? "name" : "desc",
307 width,
308 name ? menu->namelen : menu->desclen));
309 width += 2; /* FIXME - need this? */
310 return width;
311}
312#else
313#define calculate_actual_width(menu, name) (name ? menu->namelen : menu->desclen)
314#endif
315
316/*---------------------------------------------------------------------------
317| Facility : libnmenu
318| Function : void _nc_Calculate_Item_Length_and_Width(MENU *menu)
319|
320| Description : Calculate the length of an item and the width of the
321| whole menu.
322|
323| Return Values : -
324+--------------------------------------------------------------------------*/
325NCURSES_EXPORT(void)
326_nc_Calculate_Item_Length_and_Width(MENU * menu)
327{
328 int l;
329
330 assert(menu);
331
332 menu->height = 1 + menu->spc_rows * (menu->arows - 1);
333
334 l = calculate_actual_width(menu, TRUE);
335 l += menu->marklen;
336
337 if ((menu->opt & O_SHOWDESC) && (menu->desclen > 0))
338 {
339 l += calculate_actual_width(menu, FALSE);
340 l += menu->spc_desc;
341 }
342
343 menu->itemlen = l;
344 l *= menu->cols;
345 l += (menu->cols - 1) * menu->spc_cols; /* for the padding between the columns */
346 menu->width = l;
347
348 T(("_nc_CalculateItem_Length_and_Width columns %d, item %d, width %d",
349 menu->cols,
350 menu->itemlen,
351 menu->width));
352}
353
354/*---------------------------------------------------------------------------
355| Facility : libnmenu
356| Function : void _nc_Link_Item(MENU *menu)
357|
358| Description : Statically calculate for every item its four neighbors.
359| This depends on the orientation of the menu. This
360| static approach simplifies navigation in the menu a lot.
361|
362| Return Values : -
363+--------------------------------------------------------------------------*/
364NCURSES_EXPORT(void)
365_nc_Link_Items(MENU * menu)
366{
367 if (menu && menu->items && *(menu->items))
368 {
369 int i, j;
370 ITEM *item;
371 int Number_Of_Items = menu->nitems;
372 int col = 0, row = 0;
373 int Last_in_Row;
374 int Last_in_Column;
375 bool cycle = (menu->opt & O_NONCYCLIC) ? FALSE : TRUE;
376
377 menu->status &= ~_LINK_NEEDED;
378
379 if (menu->opt & O_ROWMAJOR)
380 {
381 int Number_Of_Columns = menu->cols;
382
383 for (i = 0; i < Number_Of_Items; i++)
384 {
385 item = menu->items[i];
386
387 Last_in_Row = row * Number_Of_Columns + (Number_Of_Columns - 1);
388
389 item->left = (col) ?
390 /* if we are not in the leftmost column, we can use the
391 predecessor in the items array */
392 menu->items[i - 1] :
393 (cycle ? menu->items[(Last_in_Row >= Number_Of_Items) ?
394 Number_Of_Items - 1 :
395 Last_in_Row] :
396 (ITEM *) 0);
397
398 item->right = ((col < (Number_Of_Columns - 1)) &&
399 ((i + 1) < Number_Of_Items)
400 )?
401 menu->items[i + 1] :
402 (cycle ? menu->items[row * Number_Of_Columns] :
403 (ITEM *) 0
404 );
405
406 Last_in_Column = (menu->rows - 1) * Number_Of_Columns + col;
407
408 item->up = (row) ? menu->items[i - Number_Of_Columns] :
409 (cycle ? menu->items[(Last_in_Column >= Number_Of_Items) ?
410 Number_Of_Items - 1 :
411 Last_in_Column] :
412 (ITEM *) 0);
413
414 item->down = ((i + Number_Of_Columns) < Number_Of_Items)
415 ?
416 menu->items[i + Number_Of_Columns] :
417 (cycle ? menu->items[(row + 1) < menu->rows ?
418 Number_Of_Items - 1 : col] :
419 (ITEM *) 0);
420 item->x = col;
421 item->y = row;
422 if (++col == Number_Of_Columns)
423 {
424 row++;
425 col = 0;
426 }
427 }
428 }
429 else
430 {
431 int Number_Of_Rows = menu->rows;
432
433 for (j = 0; j < Number_Of_Items; j++)
434 {
435 item = menu->items[i = (col * Number_Of_Rows + row)];
436
437 Last_in_Column = (menu->cols - 1) * Number_Of_Rows + row;
438
439 item->left = (col) ?
440 menu->items[i - Number_Of_Rows] :
441 (cycle ? (Last_in_Column >= Number_Of_Items) ?
442 menu->items[Last_in_Column - Number_Of_Rows] :
443 menu->items[Last_in_Column] :
444 (ITEM *) 0);
445
446 item->right = ((i + Number_Of_Rows) < Number_Of_Items)
447 ?
448 menu->items[i + Number_Of_Rows] :
449 (cycle ? menu->items[row] : (ITEM *) 0);
450
451 Last_in_Row = col * Number_Of_Rows + (Number_Of_Rows - 1);
452
453 item->up = (row) ?
454 menu->items[i - 1] :
455 (cycle ?
456 menu->items[(Last_in_Row >= Number_Of_Items) ?
457 Number_Of_Items - 1 :
458 Last_in_Row] :
459 (ITEM *) 0);
460
461 item->down = (row < (Number_Of_Rows - 1))
462 ?
463 (menu->items[((i + 1) < Number_Of_Items) ?
464 i + 1 :
465 (col - 1) * Number_Of_Rows + row + 1]) :
466 (cycle ?
467 menu->items[col * Number_Of_Rows] :
468 (ITEM *) 0
469 );
470
471 item->x = col;
472 item->y = row;
473 if ((++row) == Number_Of_Rows)
474 {
475 col++;
476 row = 0;
477 }
478 }
479 }
480 }
481}
482
483/*---------------------------------------------------------------------------
484| Facility : libnmenu
485| Function : void _nc_Show_Menu(const MENU *menu)
486|
487| Description : Update the window that is associated with the menu
488|
489| Return Values : -
490+--------------------------------------------------------------------------*/
491NCURSES_EXPORT(void)
492_nc_Show_Menu(const MENU * menu)
493{
494 WINDOW *win;
495 int maxy, maxx;
496
497 assert(menu);
498 if ((menu->status & _POSTED) && !(menu->status & _IN_DRIVER))
499 {
500 /* adjust the internal subwindow to start on the current top */
501 assert(menu->sub);
502 mvderwin(menu->sub, menu->spc_rows * menu->toprow, 0);
503 win = Get_Menu_Window(menu);
504
505 maxy = getmaxy(win);
506 maxx = getmaxx(win);
507
508 if (menu->height < maxy)
509 maxy = menu->height;
510 if (menu->width < maxx)
511 maxx = menu->width;
512
513 copywin(menu->sub, win, 0, 0, 0, 0, maxy - 1, maxx - 1, 0);
514 pos_menu_cursor(menu);
515 }
516}
517
518/*---------------------------------------------------------------------------
519| Facility : libnmenu
520| Function : void _nc_New_TopRow_and_CurrentItem(
521| MENU *menu,
522| int new_toprow,
523| ITEM *new_current_item)
524|
525| Description : Redisplay the menu so that the given row becomes the
526| top row and the given item becomes the new current
527| item.
528|
529| Return Values : -
530+--------------------------------------------------------------------------*/
531NCURSES_EXPORT(void)
532 _nc_New_TopRow_and_CurrentItem
533 (MENU * menu, int new_toprow, ITEM * new_current_item)
534{
535 ITEM *cur_item;
536 bool mterm_called = FALSE;
537 bool iterm_called = FALSE;
538
539 assert(menu);
540 if (menu->status & _POSTED)
541 {
542 if (new_current_item != menu->curitem)
543 {
544 Call_Hook(menu, itemterm);
545 iterm_called = TRUE;
546 }
547 if (new_toprow != menu->toprow)
548 {
549 Call_Hook(menu, menuterm);
550 mterm_called = TRUE;
551 }
552
553 cur_item = menu->curitem;
554 assert(cur_item);
555 menu->toprow = new_toprow;
556 menu->curitem = new_current_item;
557
558 if (mterm_called)
559 {
560 Call_Hook(menu, menuinit);
561 }
562 if (iterm_called)
563 {
564 /* this means, move from the old current_item to the new one... */
565 Move_To_Current_Item(menu, cur_item);
566 Call_Hook(menu, iteminit);
567 }
568 if (mterm_called || iterm_called)
569 {
570 _nc_Show_Menu(menu);
571 }
572 else
573 pos_menu_cursor(menu);
574 }
575 else
576 { /* if we are not posted, this is quite simple */
577 menu->toprow = new_toprow;
578 menu->curitem = new_current_item;
579 }
580}
581
582/* m_global.c ends here */
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