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27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Juergen Pfeifer, 1995,1997 *
31 ****************************************************************************/
33 /***************************************************************************
35 * Globally used internal routines and the default menu and item structures *
36 ***************************************************************************/
38 #include "menu.priv.h"
40 MODULE_ID("$Id: m_global.c,v 1.20 2005/04/16 17:30:57 tom Exp $")
42 static char mark[] = "-";
44 NCURSES_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 */
79 ALL_MENU_OPTS, /* options */
83 NCURSES_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 */
94 (ITEM *)0, /* right */
100 /*---------------------------------------------------------------------------
101 | Facility : libnmenu
102 | Function : static void ComputeMaximum_NameDesc_Lenths(MENU *menu)
104 | Description : Calculates the maximum name and description lengths
105 | of the items connected to the menu
108 +--------------------------------------------------------------------------*/
110 ComputeMaximum_NameDesc_Lengths(MENU * menu)
112 unsigned MaximumNameLength = 0;
113 unsigned MaximumDescriptionLength = 0;
116 assert(menu && menu->items);
117 for (items = menu->items; *items; items++)
119 if (items[0]->name.length > MaximumNameLength)
120 MaximumNameLength = items[0]->name.length;
122 if (items[0]->description.length > MaximumDescriptionLength)
123 MaximumDescriptionLength = items[0]->description.length;
126 menu->namelen = MaximumNameLength;
127 menu->desclen = MaximumDescriptionLength;
128 T(("ComputeMaximum_NameDesc_Lengths %d,%d", menu->namelen, menu->desclen));
131 /*---------------------------------------------------------------------------
132 | Facility : libnmenu
133 | Function : static void ResetConnectionInfo(MENU *, ITEM **)
135 | Description : Reset all informations in the menu and the items in
136 | the item array that indicates a connection
139 +--------------------------------------------------------------------------*/
141 ResetConnectionInfo(MENU * menu, ITEM ** items)
145 assert(menu && items);
146 for (item = items; *item; item++)
149 (*item)->imenu = (MENU *) 0;
153 menu->pattern = (char *)0;
155 menu->items = (ITEM **) 0;
159 /*---------------------------------------------------------------------------
160 | Facility : libnmenu
161 | Function : bool _nc_Connect_Items(MENU *menu, ITEM **items)
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.
167 | Return Values : TRUE - successful connection
168 | FALSE - connection failed
169 +--------------------------------------------------------------------------*/
171 _nc_Connect_Items(MENU * menu, ITEM ** items)
174 unsigned int ItemCount = 0;
178 for (item = items; *item; item++)
182 /* if a item is already connected, reject connection */
187 /* we reached the end, so there was no connected item */
189 for (item = items; *item; item++)
191 if (menu->opt & O_ONEVALUE)
193 (*item)->value = FALSE;
195 (*item)->index = ItemCount++;
196 (*item)->imenu = menu;
206 menu->nitems = ItemCount;
207 ComputeMaximum_NameDesc_Lengths(menu);
208 if ((menu->pattern = typeMalloc(char, (unsigned)(1 + menu->namelen))))
211 set_menu_format(menu, menu->frows, menu->fcols);
212 menu->curitem = *items;
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);
224 /*---------------------------------------------------------------------------
225 | Facility : libnmenu
226 | Function : void _nc_Disconnect_Items(MENU *menu)
228 | Description : Disconnect the menus item array from the menu
231 +--------------------------------------------------------------------------*/
233 _nc_Disconnect_Items(MENU * menu)
235 if (menu && menu->items)
236 ResetConnectionInfo(menu, menu->items);
239 /*---------------------------------------------------------------------------
240 | Facility : libnmenu
241 | Function : int _nc_Calculate_Text_Width(const TEXT * item)
243 | Description : Calculate the number of columns for a TEXT.
245 | Return Values : the width
246 +--------------------------------------------------------------------------*/
248 _nc_Calculate_Text_Width(const TEXT * item /*FIXME: limit length */ )
250 #if USE_WIDEC_SUPPORT
251 int result = item->length;
252 int count = mbstowcs(0, item->str, 0);
255 T((T_CALLED("_nc_menu_text_width(%p)"), item));
257 && (temp = typeMalloc(wchar_t, 2 + count)) != 0)
262 mbstowcs(temp, item->str, (unsigned)count);
263 for (n = 0; n < count; ++n)
265 int test = wcwidth(temp[n]);
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.
282 #if 0 /* USE_WIDEC_SUPPORT */
284 calculate_actual_width(MENU * menu, bool name)
290 assert(menu && menu->items);
291 for (items = menu->items; *items; items++)
295 check = _nc_Calculate_Text_Width(&((*items)->name));
299 check = _nc_Calculate_Text_Width(&((*items)->description));
305 T(("calculate_actual_width %s = %d/%d",
306 name ? "name" : "desc",
308 name ? menu->namelen : menu->desclen));
309 width += 2; /* FIXME - need this? */
313 #define calculate_actual_width(menu, name) (name ? menu->namelen : menu->desclen)
316 /*---------------------------------------------------------------------------
317 | Facility : libnmenu
318 | Function : void _nc_Calculate_Item_Length_and_Width(MENU *menu)
320 | Description : Calculate the length of an item and the width of the
324 +--------------------------------------------------------------------------*/
326 _nc_Calculate_Item_Length_and_Width(MENU * menu)
332 menu->height = 1 + menu->spc_rows * (menu->arows - 1);
334 l = calculate_actual_width(menu, TRUE);
337 if ((menu->opt & O_SHOWDESC) && (menu->desclen > 0))
339 l += calculate_actual_width(menu, FALSE);
345 l += (menu->cols - 1) * menu->spc_cols; /* for the padding between the columns */
348 T(("_nc_CalculateItem_Length_and_Width columns %d, item %d, width %d",
354 /*---------------------------------------------------------------------------
355 | Facility : libnmenu
356 | Function : void _nc_Link_Item(MENU *menu)
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.
363 +--------------------------------------------------------------------------*/
365 _nc_Link_Items(MENU * menu)
367 if (menu && menu->items && *(menu->items))
371 int Number_Of_Items = menu->nitems;
372 int col = 0, row = 0;
375 bool cycle = (menu->opt & O_NONCYCLIC) ? FALSE : TRUE;
377 menu->status &= ~_LINK_NEEDED;
379 if (menu->opt & O_ROWMAJOR)
381 int Number_Of_Columns = menu->cols;
383 for (i = 0; i < Number_Of_Items; i++)
385 item = menu->items[i];
387 Last_in_Row = row * Number_Of_Columns + (Number_Of_Columns - 1);
390 /* if we are not in the leftmost column, we can use the
391 predecessor in the items array */
393 (cycle ? menu->items[(Last_in_Row >= Number_Of_Items) ?
394 Number_Of_Items - 1 :
398 item->right = ((col < (Number_Of_Columns - 1)) &&
399 ((i + 1) < Number_Of_Items)
402 (cycle ? menu->items[row * Number_Of_Columns] :
406 Last_in_Column = (menu->rows - 1) * Number_Of_Columns + col;
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 :
414 item->down = ((i + Number_Of_Columns) < Number_Of_Items)
416 menu->items[i + Number_Of_Columns] :
417 (cycle ? menu->items[(row + 1) < menu->rows ?
418 Number_Of_Items - 1 : col] :
422 if (++col == Number_Of_Columns)
431 int Number_Of_Rows = menu->rows;
433 for (j = 0; j < Number_Of_Items; j++)
435 item = menu->items[i = (col * Number_Of_Rows + row)];
437 Last_in_Column = (menu->cols - 1) * Number_Of_Rows + row;
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] :
446 item->right = ((i + Number_Of_Rows) < Number_Of_Items)
448 menu->items[i + Number_Of_Rows] :
449 (cycle ? menu->items[row] : (ITEM *) 0);
451 Last_in_Row = col * Number_Of_Rows + (Number_Of_Rows - 1);
456 menu->items[(Last_in_Row >= Number_Of_Items) ?
457 Number_Of_Items - 1 :
461 item->down = (row < (Number_Of_Rows - 1))
463 (menu->items[((i + 1) < Number_Of_Items) ?
465 (col - 1) * Number_Of_Rows + row + 1]) :
467 menu->items[col * Number_Of_Rows] :
473 if ((++row) == Number_Of_Rows)
483 /*---------------------------------------------------------------------------
484 | Facility : libnmenu
485 | Function : void _nc_Show_Menu(const MENU *menu)
487 | Description : Update the window that is associated with the menu
490 +--------------------------------------------------------------------------*/
492 _nc_Show_Menu(const MENU * menu)
498 if ((menu->status & _POSTED) && !(menu->status & _IN_DRIVER))
500 /* adjust the internal subwindow to start on the current top */
502 mvderwin(menu->sub, menu->spc_rows * menu->toprow, 0);
503 win = Get_Menu_Window(menu);
508 if (menu->height < maxy)
510 if (menu->width < maxx)
513 copywin(menu->sub, win, 0, 0, 0, 0, maxy - 1, maxx - 1, 0);
514 pos_menu_cursor(menu);
518 /*---------------------------------------------------------------------------
519 | Facility : libnmenu
520 | Function : void _nc_New_TopRow_and_CurrentItem(
523 | ITEM *new_current_item)
525 | Description : Redisplay the menu so that the given row becomes the
526 | top row and the given item becomes the new current
530 +--------------------------------------------------------------------------*/
532 _nc_New_TopRow_and_CurrentItem
533 (MENU * menu, int new_toprow, ITEM * new_current_item)
536 bool mterm_called = FALSE;
537 bool iterm_called = FALSE;
540 if (menu->status & _POSTED)
542 if (new_current_item != menu->curitem)
544 Call_Hook(menu, itemterm);
547 if (new_toprow != menu->toprow)
549 Call_Hook(menu, menuterm);
553 cur_item = menu->curitem;
555 menu->toprow = new_toprow;
556 menu->curitem = new_current_item;
560 Call_Hook(menu, menuinit);
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);
568 if (mterm_called || iterm_called)
573 pos_menu_cursor(menu);
576 { /* if we are not posted, this is quite simple */
577 menu->toprow = new_toprow;
578 menu->curitem = new_current_item;
582 /* m_global.c ends here */