aboutsummaryrefslogtreecommitdiff
path: root/contrib/ncurses/menu/m_post.c
blob: 657d0f18420be2411c77c7f548d6c6d20d278862 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
/****************************************************************************
 * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc.              *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/****************************************************************************
 *   Author:  Juergen Pfeifer, 1995,1997                                    *
 ****************************************************************************/

/***************************************************************************
* Module m_post                                                            *
* Write or erase menus from associated subwindows                          *
***************************************************************************/

#include "menu.priv.h"

MODULE_ID("$Id: m_post.c,v 1.26 2004/12/25 23:57:04 tom Exp $")

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu
|   Function      :  void _nc_Post_Item(MENU *menu, ITEM *item)
|
|   Description   :  Draw the item in the menus window at the current
|                    window position
|
|   Return Values :  -
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(void)
_nc_Post_Item(const MENU * menu, const ITEM * item)
{
  int i;
  chtype ch;
  int item_x, item_y;
  int count = 0;
  bool isfore = FALSE, isback = FALSE, isgrey = FALSE;
  int name_len;
  int desc_len;

  assert(menu->win);

  getyx(menu->win, item_y, item_x);

  /* We need a marker iff
     - it is a onevalued menu and it is the current item
     - or it has a selection value
   */
  wattron(menu->win, menu->back);
  if (item->value || (item == menu->curitem))
    {
      if (menu->marklen)
	{
	  /* In a multi selection menu we use the fore attribute
	     for a selected marker that is not the current one.
	     This improves visualization of the menu, because now
	     always the 'normal' marker denotes the current
	     item. */
	  if (!(menu->opt & O_ONEVALUE) && item->value && item != menu->curitem)
	    {
	      wattron(menu->win, menu->fore);
	      isfore = TRUE;
	    }
	  waddstr(menu->win, menu->mark);
	  if (isfore)
	    {
	      wattron(menu->win, menu->fore);
	      isfore = FALSE;
	    }
	}
    }
  else				/* otherwise we have to wipe out the marker area */
    for (ch = ' ', i = menu->marklen; i > 0; i--)
      waddch(menu->win, ch);
  wattroff(menu->win, menu->back);
  count += menu->marklen;

  /* First we have to calculate the attribute depending on selectability
     and selection status
   */
  if (!(item->opt & O_SELECTABLE))
    {
      wattron(menu->win, menu->grey);
      isgrey = TRUE;
    }
  else
    {
      if (item->value || item == menu->curitem)
	{
	  wattron(menu->win, menu->fore);
	  isfore = TRUE;
	}
      else
	{
	  wattron(menu->win, menu->back);
	  isback = TRUE;
	}
    }

  waddnstr(menu->win, item->name.str, item->name.length);
  name_len = _nc_Calculate_Text_Width(&(item->name));
  for (ch = ' ', i = menu->namelen - name_len; i > 0; i--)
    {
      waddch(menu->win, ch);
    }
  count += menu->namelen;

  /* Show description if required and available */
  if ((menu->opt & O_SHOWDESC) && menu->desclen > 0)
    {
      int m = menu->spc_desc / 2;
      int cy = -1, cx = -1;

      for (ch = ' ', i = 0; i < menu->spc_desc; i++)
	{
	  if (i == m)
	    {
	      waddch(menu->win, menu->pad);
	      getyx(menu->win, cy, cx);
	    }
	  else
	    waddch(menu->win, ch);
	}
      if (item->description.length)
	waddnstr(menu->win, item->description.str, item->description.length);
      desc_len = _nc_Calculate_Text_Width(&(item->description));
      for (ch = ' ', i = menu->desclen - desc_len; i > 0; i--)
	{
	  waddch(menu->win, ch);
	}
      count += menu->desclen + menu->spc_desc;

      if (menu->spc_rows > 1)
	{
	  int j, k, ncy, ncx;

	  assert(cx >= 0 && cy >= 0);
	  getyx(menu->win, ncy, ncx);
	  if (isgrey)
	    wattroff(menu->win, menu->grey);
	  else if (isfore)
	    wattroff(menu->win, menu->fore);
	  wattron(menu->win, menu->back);
	  for (j = 1; j < menu->spc_rows; j++)
	    {
	      if ((item_y + j) < getmaxy(menu->win))
		{
		  wmove(menu->win, item_y + j, item_x);
		  for (k = 0; k < count; k++)
		    waddch(menu->win, ' ');
		}
	      if ((cy + j) < getmaxy(menu->win))
		mvwaddch(menu->win, cy + j, cx - 1, menu->pad);
	    }
	  wmove(menu->win, ncy, ncx);
	  if (!isback)
	    wattroff(menu->win, menu->back);
	}
    }

  /* Remove attributes */
  if (isfore)
    wattroff(menu->win, menu->fore);
  if (isback)
    wattroff(menu->win, menu->back);
  if (isgrey)
    wattroff(menu->win, menu->grey);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu
|   Function      :  void _nc_Draw_Menu(const MENU *)
|
|   Description   :  Display the menu in its windows
|
|   Return Values :  -
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(void)
_nc_Draw_Menu(const MENU * menu)
{
  ITEM *item = menu->items[0];
  ITEM *lasthor, *lastvert;
  ITEM *hitem;
  int y = 0;
  chtype s_bkgd;

  assert(item && menu->win);

  s_bkgd = getbkgd(menu->win);
  wbkgdset(menu->win, menu->back);
  werase(menu->win);
  wbkgdset(menu->win, s_bkgd);

  lastvert = (menu->opt & O_NONCYCLIC) ? (ITEM *) 0 : item;

  do
    {
      wmove(menu->win, y, 0);

      hitem = item;
      lasthor = (menu->opt & O_NONCYCLIC) ? (ITEM *) 0 : hitem;

      do
	{
	  _nc_Post_Item(menu, hitem);

	  wattron(menu->win, menu->back);
	  if (((hitem = hitem->right) != lasthor) && hitem)
	    {
	      int i, j, cy, cx;
	      chtype ch = ' ';

	      getyx(menu->win, cy, cx);
	      for (j = 0; j < menu->spc_rows; j++)
		{
		  wmove(menu->win, cy + j, cx);
		  for (i = 0; i < menu->spc_cols; i++)
		    {
		      waddch(menu->win, ch);
		    }
		}
	      wmove(menu->win, cy, cx + menu->spc_cols);
	    }
	}
      while (hitem && (hitem != lasthor));
      wattroff(menu->win, menu->back);

      item = item->down;
      y += menu->spc_rows;

    }
  while (item && (item != lastvert));
}

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu
|   Function      :  int post_menu(MENU *)
|
|   Description   :  Post a menu to the screen. This makes it visible.
|
|   Return Values :  E_OK                - success
|                    E_BAD_ARGUMENT      - not a valid menu pointer
|                    E_SYSTEM_ERROR      - error in lower layers
|                    E_NOT_CONNECTED     - No items connected to menu
|                    E_BAD_STATE         - Menu in userexit routine
|                    E_POSTED            - Menu already posted
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
post_menu(MENU * menu)
{
  T((T_CALLED("post_menu(%p)"), menu));

  if (!menu)
    RETURN(E_BAD_ARGUMENT);

  if (menu->status & _IN_DRIVER)
    RETURN(E_BAD_STATE);

  if (menu->status & _POSTED)
    RETURN(E_POSTED);

  if (menu->items && *(menu->items))
    {
      int y;
      int h = 1 + menu->spc_rows * (menu->rows - 1);

      WINDOW *win = Get_Menu_Window(menu);
      int maxy = getmaxy(win);

      if ((menu->win = newpad(h, menu->width)))
	{
	  y = (maxy >= h) ? h : maxy;
	  if (y >= menu->height)
	    y = menu->height;
	  if (!(menu->sub = subpad(menu->win, y, menu->width, 0, 0)))
	    RETURN(E_SYSTEM_ERROR);
	}
      else
	RETURN(E_SYSTEM_ERROR);

      if (menu->status & _LINK_NEEDED)
	_nc_Link_Items(menu);
    }
  else
    RETURN(E_NOT_CONNECTED);

  menu->status |= _POSTED;

  if (!(menu->opt & O_ONEVALUE))
    {
      ITEM **items;

      for (items = menu->items; *items; items++)
	{
	  (*items)->value = FALSE;
	}
    }

  _nc_Draw_Menu(menu);

  Call_Hook(menu, menuinit);
  Call_Hook(menu, iteminit);

  _nc_Show_Menu(menu);

  RETURN(E_OK);
}

/*---------------------------------------------------------------------------
|   Facility      :  libnmenu
|   Function      :  int unpost_menu(MENU *)
|
|   Description   :  Detach menu from screen
|
|   Return Values :  E_OK              - success
|                    E_BAD_ARGUMENT    - not a valid menu pointer
|                    E_BAD_STATE       - menu in userexit routine
|                    E_NOT_POSTED      - menu is not posted
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(int)
unpost_menu(MENU * menu)
{
  WINDOW *win;

  T((T_CALLED("unpost_menu(%p)"), menu));

  if (!menu)
    RETURN(E_BAD_ARGUMENT);

  if (menu->status & _IN_DRIVER)
    RETURN(E_BAD_STATE);

  if (!(menu->status & _POSTED))
    RETURN(E_NOT_POSTED);

  Call_Hook(menu, itemterm);
  Call_Hook(menu, menuterm);

  win = Get_Menu_Window(menu);
  werase(win);
  wsyncup(win);

  assert(menu->sub);
  delwin(menu->sub);
  menu->sub = (WINDOW *)0;

  assert(menu->win);
  delwin(menu->win);
  menu->win = (WINDOW *)0;

  menu->status &= ~_POSTED;

  RETURN(E_OK);
}

/* m_post.c ends here */