File: | src/lib/libmenu/m_post.c |
Warning: | line 231, column 18 Access to field 'right' results in a dereference of a null pointer (loaded from variable 'hitem') |
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1 | /* $OpenBSD: m_post.c,v 1.7 2010/01/12 23:22:08 nicm Exp $ */ | |||
2 | ||||
3 | /**************************************************************************** | |||
4 | * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc. * | |||
5 | * * | |||
6 | * Permission is hereby granted, free of charge, to any person obtaining a * | |||
7 | * copy of this software and associated documentation files (the * | |||
8 | * "Software"), to deal in the Software without restriction, including * | |||
9 | * without limitation the rights to use, copy, modify, merge, publish, * | |||
10 | * distribute, distribute with modifications, sublicense, and/or sell * | |||
11 | * copies of the Software, and to permit persons to whom the Software is * | |||
12 | * furnished to do so, subject to the following conditions: * | |||
13 | * * | |||
14 | * The above copyright notice and this permission notice shall be included * | |||
15 | * in all copies or substantial portions of the Software. * | |||
16 | * * | |||
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * | |||
18 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * | |||
19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * | |||
20 | * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * | |||
21 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * | |||
22 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * | |||
23 | * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * | |||
24 | * * | |||
25 | * Except as contained in this notice, the name(s) of the above copyright * | |||
26 | * holders shall not be used in advertising or otherwise to promote the * | |||
27 | * sale, use or other dealings in this Software without prior written * | |||
28 | * authorization. * | |||
29 | ****************************************************************************/ | |||
30 | ||||
31 | /**************************************************************************** | |||
32 | * Author: Juergen Pfeifer, 1995,1997 * | |||
33 | ****************************************************************************/ | |||
34 | ||||
35 | /*************************************************************************** | |||
36 | * Module m_post * | |||
37 | * Write or erase menus from associated subwindows * | |||
38 | ***************************************************************************/ | |||
39 | ||||
40 | #include "menu.priv.h" | |||
41 | ||||
42 | MODULE_ID("$Id: m_post.c,v 1.7 2010/01/12 23:22:08 nicm Exp $") | |||
43 | ||||
44 | /*--------------------------------------------------------------------------- | |||
45 | | Facility : libnmenu | |||
46 | | Function : void _nc_Post_Item(MENU *menu, ITEM *item) | |||
47 | | | |||
48 | | Description : Draw the item in the menus window at the current | |||
49 | | window position | |||
50 | | | |||
51 | | Return Values : - | |||
52 | +--------------------------------------------------------------------------*/ | |||
53 | NCURSES_EXPORT(void)void | |||
54 | _nc_Post_Item(const MENU * menu, const ITEM * item) | |||
55 | { | |||
56 | int i; | |||
57 | chtype ch; | |||
58 | int item_x, item_y; | |||
59 | int count = 0; | |||
60 | bool_Bool isfore = FALSE0, isback = FALSE0, isgrey = FALSE0; | |||
61 | int name_len; | |||
62 | int desc_len; | |||
63 | ||||
64 | assert(menu->win)((void)0); | |||
65 | ||||
66 | getyx(menu->win, item_y, item_x)(item_y = ((menu->win) ? (menu->win)->_cury : (-1)), item_x = ((menu->win) ? (menu->win)->_curx : (-1))); | |||
67 | ||||
68 | /* We need a marker iff | |||
69 | - it is a onevalued menu and it is the current item | |||
70 | - or it has a selection value | |||
71 | */ | |||
72 | wattron(menu->win, menu->back)wattr_on(menu->win, (attr_t)(menu->back), ((void*)0)); | |||
73 | if (item->value || (item == menu->curitem)) | |||
74 | { | |||
75 | if (menu->marklen) | |||
76 | { | |||
77 | /* In a multi selection menu we use the fore attribute | |||
78 | for a selected marker that is not the current one. | |||
79 | This improves visualization of the menu, because now | |||
80 | always the 'normal' marker denotes the current | |||
81 | item. */ | |||
82 | if (!(menu->opt & O_ONEVALUE(0x01)) && item->value && item != menu->curitem) | |||
83 | { | |||
84 | wattron(menu->win, menu->fore)wattr_on(menu->win, (attr_t)(menu->fore), ((void*)0)); | |||
85 | isfore = TRUE1; | |||
86 | } | |||
87 | waddstr(menu->win, menu->mark)waddnstr(menu->win,menu->mark,-1); | |||
88 | if (isfore) | |||
89 | { | |||
90 | wattron(menu->win, menu->fore)wattr_on(menu->win, (attr_t)(menu->fore), ((void*)0)); | |||
91 | isfore = FALSE0; | |||
92 | } | |||
93 | } | |||
94 | } | |||
95 | else /* otherwise we have to wipe out the marker area */ | |||
96 | for (ch = ' ', i = menu->marklen; i > 0; i--) | |||
97 | waddch(menu->win, ch); | |||
98 | wattroff(menu->win, menu->back)wattr_off(menu->win, (attr_t)(menu->back), ((void*)0)); | |||
99 | count += menu->marklen; | |||
100 | ||||
101 | /* First we have to calculate the attribute depending on selectability | |||
102 | and selection status | |||
103 | */ | |||
104 | if (!(item->opt & O_SELECTABLE(0x01))) | |||
105 | { | |||
106 | wattron(menu->win, menu->grey)wattr_on(menu->win, (attr_t)(menu->grey), ((void*)0)); | |||
107 | isgrey = TRUE1; | |||
108 | } | |||
109 | else | |||
110 | { | |||
111 | if (item->value || item == menu->curitem) | |||
112 | { | |||
113 | wattron(menu->win, menu->fore)wattr_on(menu->win, (attr_t)(menu->fore), ((void*)0)); | |||
114 | isfore = TRUE1; | |||
115 | } | |||
116 | else | |||
117 | { | |||
118 | wattron(menu->win, menu->back)wattr_on(menu->win, (attr_t)(menu->back), ((void*)0)); | |||
119 | isback = TRUE1; | |||
120 | } | |||
121 | } | |||
122 | ||||
123 | waddnstr(menu->win, item->name.str, item->name.length); | |||
124 | name_len = _nc_Calculate_Text_Width(&(item->name)); | |||
125 | for (ch = ' ', i = menu->namelen - name_len; i > 0; i--) | |||
126 | { | |||
127 | waddch(menu->win, ch); | |||
128 | } | |||
129 | count += menu->namelen; | |||
130 | ||||
131 | /* Show description if required and available */ | |||
132 | if ((menu->opt & O_SHOWDESC(0x02)) && menu->desclen > 0) | |||
133 | { | |||
134 | int m = menu->spc_desc / 2; | |||
135 | int cy = -1, cx = -1; | |||
136 | ||||
137 | for (ch = ' ', i = 0; i < menu->spc_desc; i++) | |||
138 | { | |||
139 | if (i == m) | |||
140 | { | |||
141 | waddch(menu->win, menu->pad); | |||
142 | getyx(menu->win, cy, cx)(cy = ((menu->win) ? (menu->win)->_cury : (-1)), cx = ((menu->win) ? (menu->win)->_curx : (-1))); | |||
143 | } | |||
144 | else | |||
145 | waddch(menu->win, ch); | |||
146 | } | |||
147 | if (item->description.length) | |||
148 | waddnstr(menu->win, item->description.str, item->description.length); | |||
149 | desc_len = _nc_Calculate_Text_Width(&(item->description)); | |||
150 | for (ch = ' ', i = menu->desclen - desc_len; i > 0; i--) | |||
151 | { | |||
152 | waddch(menu->win, ch); | |||
153 | } | |||
154 | count += menu->desclen + menu->spc_desc; | |||
155 | ||||
156 | if (menu->spc_rows > 1) | |||
157 | { | |||
158 | int j, k, ncy, ncx; | |||
159 | ||||
160 | assert(cx >= 0 && cy >= 0)((void)0); | |||
161 | getyx(menu->win, ncy, ncx)(ncy = ((menu->win) ? (menu->win)->_cury : (-1)), ncx = ((menu->win) ? (menu->win)->_curx : (-1))); | |||
162 | if (isgrey) | |||
163 | wattroff(menu->win, menu->grey)wattr_off(menu->win, (attr_t)(menu->grey), ((void*)0)); | |||
164 | else if (isfore) | |||
165 | wattroff(menu->win, menu->fore)wattr_off(menu->win, (attr_t)(menu->fore), ((void*)0)); | |||
166 | wattron(menu->win, menu->back)wattr_on(menu->win, (attr_t)(menu->back), ((void*)0)); | |||
167 | for (j = 1; j < menu->spc_rows; j++) | |||
168 | { | |||
169 | if ((item_y + j) < getmaxy(menu->win)((menu->win) ? ((menu->win)->_maxy + 1) : (-1))) | |||
170 | { | |||
171 | wmove(menu->win, item_y + j, item_x); | |||
172 | for (k = 0; k < count; k++) | |||
173 | waddch(menu->win, ' '); | |||
174 | } | |||
175 | if ((cy + j) < getmaxy(menu->win)((menu->win) ? ((menu->win)->_maxy + 1) : (-1))) | |||
176 | mvwaddch(menu->win, cy + j, cx - 1, menu->pad)(wmove(menu->win,cy + j,cx - 1) == (-1) ? (-1) : waddch(menu ->win,menu->pad)); | |||
177 | } | |||
178 | wmove(menu->win, ncy, ncx); | |||
179 | if (!isback) | |||
180 | wattroff(menu->win, menu->back)wattr_off(menu->win, (attr_t)(menu->back), ((void*)0)); | |||
181 | } | |||
182 | } | |||
183 | ||||
184 | /* Remove attributes */ | |||
185 | if (isfore) | |||
186 | wattroff(menu->win, menu->fore)wattr_off(menu->win, (attr_t)(menu->fore), ((void*)0)); | |||
187 | if (isback) | |||
188 | wattroff(menu->win, menu->back)wattr_off(menu->win, (attr_t)(menu->back), ((void*)0)); | |||
189 | if (isgrey) | |||
190 | wattroff(menu->win, menu->grey)wattr_off(menu->win, (attr_t)(menu->grey), ((void*)0)); | |||
191 | } | |||
192 | ||||
193 | /*--------------------------------------------------------------------------- | |||
194 | | Facility : libnmenu | |||
195 | | Function : void _nc_Draw_Menu(const MENU *) | |||
196 | | | |||
197 | | Description : Display the menu in its windows | |||
198 | | | |||
199 | | Return Values : - | |||
200 | +--------------------------------------------------------------------------*/ | |||
201 | NCURSES_EXPORT(void)void | |||
202 | _nc_Draw_Menu(const MENU * menu) | |||
203 | { | |||
204 | ITEM *item = menu->items[0]; | |||
205 | ITEM *lasthor, *lastvert; | |||
206 | ITEM *hitem; | |||
207 | int y = 0; | |||
208 | chtype s_bkgd; | |||
209 | ||||
210 | assert(item && menu->win)((void)0); | |||
211 | ||||
212 | s_bkgd = getbkgd(menu->win)((menu->win)->_bkgd); | |||
213 | wbkgdset(menu->win, menu->back); | |||
214 | werase(menu->win); | |||
215 | wbkgdset(menu->win, s_bkgd); | |||
216 | ||||
217 | lastvert = (menu->opt & O_NONCYCLIC(0x20)) ? (ITEM *) 0 : item; | |||
218 | ||||
219 | do | |||
220 | { | |||
221 | wmove(menu->win, y, 0); | |||
222 | ||||
223 | hitem = item; | |||
224 | lasthor = (menu->opt & O_NONCYCLIC(0x20)) ? (ITEM *) 0 : hitem; | |||
225 | ||||
226 | do | |||
227 | { | |||
228 | _nc_Post_Item(menu, hitem); | |||
229 | ||||
230 | wattron(menu->win, menu->back)wattr_on(menu->win, (attr_t)(menu->back), ((void*)0)); | |||
231 | if (((hitem = hitem->right) != lasthor) && hitem) | |||
| ||||
232 | { | |||
233 | int i, j, cy, cx; | |||
234 | chtype ch = ' '; | |||
235 | ||||
236 | getyx(menu->win, cy, cx)(cy = ((menu->win) ? (menu->win)->_cury : (-1)), cx = ((menu->win) ? (menu->win)->_curx : (-1))); | |||
237 | for (j = 0; j < menu->spc_rows; j++) | |||
238 | { | |||
239 | wmove(menu->win, cy + j, cx); | |||
240 | for (i = 0; i < menu->spc_cols; i++) | |||
241 | { | |||
242 | waddch(menu->win, ch); | |||
243 | } | |||
244 | } | |||
245 | wmove(menu->win, cy, cx + menu->spc_cols); | |||
246 | } | |||
247 | } | |||
248 | while (hitem && (hitem != lasthor)); | |||
249 | wattroff(menu->win, menu->back)wattr_off(menu->win, (attr_t)(menu->back), ((void*)0)); | |||
250 | ||||
251 | item = item->down; | |||
252 | y += menu->spc_rows; | |||
253 | ||||
254 | } | |||
255 | while (item && (item != lastvert)); | |||
256 | } | |||
257 | ||||
258 | /*--------------------------------------------------------------------------- | |||
259 | | Facility : libnmenu | |||
260 | | Function : int post_menu(MENU *) | |||
261 | | | |||
262 | | Description : Post a menu to the screen. This makes it visible. | |||
263 | | | |||
264 | | Return Values : E_OK - success | |||
265 | | E_BAD_ARGUMENT - not a valid menu pointer | |||
266 | | E_SYSTEM_ERROR - error in lower layers | |||
267 | | E_NOT_CONNECTED - No items connected to menu | |||
268 | | E_BAD_STATE - Menu in userexit routine | |||
269 | | E_POSTED - Menu already posted | |||
270 | +--------------------------------------------------------------------------*/ | |||
271 | NCURSES_EXPORT(int)int | |||
272 | post_menu(MENU * menu) | |||
273 | { | |||
274 | T((T_CALLED("post_menu(%p)"), menu)); | |||
275 | ||||
276 | if (!menu) | |||
| ||||
277 | RETURN(E_BAD_ARGUMENT)return( ((*__errno())=((-2))) ); | |||
278 | ||||
279 | if (menu->status & _IN_DRIVER(0x02U)) | |||
280 | RETURN(E_BAD_STATE)return( ((*__errno())=((-5))) ); | |||
281 | ||||
282 | if (menu->status & _POSTED(0x01U)) | |||
283 | RETURN(E_POSTED)return( ((*__errno())=((-3))) ); | |||
284 | ||||
285 | if (menu->items && *(menu->items)) | |||
286 | { | |||
287 | int y; | |||
288 | int h = 1 + menu->spc_rows * (menu->rows - 1); | |||
289 | ||||
290 | WINDOW *win = Get_Menu_Window(menu)((menu)->usersub ? (menu)->usersub : ((menu)->userwin ? (menu)->userwin : stdscr)); | |||
291 | int maxy = getmaxy(win)((win) ? ((win)->_maxy + 1) : (-1)); | |||
292 | ||||
293 | if ((menu->win = newpad(h, menu->width))) | |||
294 | { | |||
295 | y = (maxy >= h) ? h : maxy; | |||
296 | if (y >= menu->height) | |||
297 | y = menu->height; | |||
298 | if (!(menu->sub = subpad(menu->win, y, menu->width, 0, 0))) | |||
299 | RETURN(E_SYSTEM_ERROR)return( ((*__errno())=((-1))) ); | |||
300 | } | |||
301 | else | |||
302 | RETURN(E_SYSTEM_ERROR)return( ((*__errno())=((-1))) ); | |||
303 | ||||
304 | if (menu->status & _LINK_NEEDED(0x04)) | |||
305 | _nc_Link_Items(menu); | |||
306 | } | |||
307 | else | |||
308 | RETURN(E_NOT_CONNECTED)return( ((*__errno())=((-11))) ); | |||
309 | ||||
310 | menu->status |= _POSTED(0x01U); | |||
311 | ||||
312 | if (!(menu->opt & O_ONEVALUE(0x01))) | |||
313 | { | |||
314 | ITEM **items; | |||
315 | ||||
316 | for (items = menu->items; *items; items++) | |||
317 | { | |||
318 | (*items)->value = FALSE0; | |||
319 | } | |||
320 | } | |||
321 | ||||
322 | _nc_Draw_Menu(menu); | |||
323 | ||||
324 | Call_Hook(menu, menuinit)if ( (menu) != 0 && ((menu)->menuinit) != (void *) 0 ) { (menu)->status |= (0x02U); (menu)->menuinit(menu ); (menu)->status &= ~(0x02U); }; | |||
325 | Call_Hook(menu, iteminit)if ( (menu) != 0 && ((menu)->iteminit) != (void *) 0 ) { (menu)->status |= (0x02U); (menu)->iteminit(menu ); (menu)->status &= ~(0x02U); }; | |||
326 | ||||
327 | _nc_Show_Menu(menu); | |||
328 | ||||
329 | RETURN(E_OK)return( ((*__errno())=((0))) ); | |||
330 | } | |||
331 | ||||
332 | /*--------------------------------------------------------------------------- | |||
333 | | Facility : libnmenu | |||
334 | | Function : int unpost_menu(MENU *) | |||
335 | | | |||
336 | | Description : Detach menu from screen | |||
337 | | | |||
338 | | Return Values : E_OK - success | |||
339 | | E_BAD_ARGUMENT - not a valid menu pointer | |||
340 | | E_BAD_STATE - menu in userexit routine | |||
341 | | E_NOT_POSTED - menu is not posted | |||
342 | +--------------------------------------------------------------------------*/ | |||
343 | NCURSES_EXPORT(int)int | |||
344 | unpost_menu(MENU * menu) | |||
345 | { | |||
346 | WINDOW *win; | |||
347 | ||||
348 | T((T_CALLED("unpost_menu(%p)"), menu)); | |||
349 | ||||
350 | if (!menu) | |||
351 | RETURN(E_BAD_ARGUMENT)return( ((*__errno())=((-2))) ); | |||
352 | ||||
353 | if (menu->status & _IN_DRIVER(0x02U)) | |||
354 | RETURN(E_BAD_STATE)return( ((*__errno())=((-5))) ); | |||
355 | ||||
356 | if (!(menu->status & _POSTED(0x01U))) | |||
357 | RETURN(E_NOT_POSTED)return( ((*__errno())=((-7))) ); | |||
358 | ||||
359 | Call_Hook(menu, itemterm)if ( (menu) != 0 && ((menu)->itemterm) != (void *) 0 ) { (menu)->status |= (0x02U); (menu)->itemterm(menu ); (menu)->status &= ~(0x02U); }; | |||
360 | Call_Hook(menu, menuterm)if ( (menu) != 0 && ((menu)->menuterm) != (void *) 0 ) { (menu)->status |= (0x02U); (menu)->menuterm(menu ); (menu)->status &= ~(0x02U); }; | |||
361 | ||||
362 | win = Get_Menu_Window(menu)((menu)->usersub ? (menu)->usersub : ((menu)->userwin ? (menu)->userwin : stdscr)); | |||
363 | werase(win); | |||
364 | wsyncup(win); | |||
365 | ||||
366 | assert(menu->sub)((void)0); | |||
367 | delwin(menu->sub); | |||
368 | menu->sub = (WINDOW *)0; | |||
369 | ||||
370 | assert(menu->win)((void)0); | |||
371 | delwin(menu->win); | |||
372 | menu->win = (WINDOW *)0; | |||
373 | ||||
374 | menu->status &= ~_POSTED(0x01U); | |||
375 | ||||
376 | RETURN(E_OK)return( ((*__errno())=((0))) ); | |||
377 | } | |||
378 | ||||
379 | /* m_post.c ends here */ |