1 /**************************************************************************** 2 * Copyright 2020-2021,2022 Thomas E. Dickey * 3 * Copyright 1998-2010,2012 Free Software Foundation, Inc. * 4 * * 5 * Permission is hereby granted, free of charge, to any person obtaining a * 6 * copy of this software and associated documentation files (the * 7 * "Software"), to deal in the Software without restriction, including * 8 * without limitation the rights to use, copy, modify, merge, publish, * 9 * distribute, distribute with modifications, sublicense, and/or sell * 10 * copies of the Software, and to permit persons to whom the Software is * 11 * furnished to do so, subject to the following conditions: * 12 * * 13 * The above copyright notice and this permission notice shall be included * 14 * in all copies or substantial portions of the Software. * 15 * * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 23 * * 24 * Except as contained in this notice, the name(s) of the above copyright * 25 * holders shall not be used in advertising or otherwise to promote the * 26 * sale, use or other dealings in this Software without prior written * 27 * authorization. * 28 ****************************************************************************/ 29 30 /**************************************************************************** 31 * Author: Juergen Pfeifer, 1995,1997 * 32 ****************************************************************************/ 33 34 /*************************************************************************** 35 * Module m_post * 36 * Write or erase menus from associated subwindows * 37 ***************************************************************************/ 38 39 #include "menu.priv.h" 40 41 MODULE_ID("$Id: m_post.c,v 1.38 2022/09/24 09:38:44 tom Exp $") 42 43 /*--------------------------------------------------------------------------- 44 | Facility : libnmenu 45 | Function : void _nc_Post_Item(MENU *menu, ITEM *item) 46 | 47 | Description : Draw the item in the menus window at the current 48 | window position 49 | 50 | Return Values : - 51 +--------------------------------------------------------------------------*/ 52 MENU_EXPORT(void) 53 _nc_Post_Item(const MENU *menu, const ITEM *item) 54 { 55 int i; 56 chtype ch; 57 int item_x, item_y; 58 int count = 0; 59 bool isfore = FALSE, isback = FALSE, isgrey = FALSE; 60 int name_len; 61 62 assert(menu->win); 63 64 getyx(menu->win, item_y, item_x); 65 66 /* We need a marker iff 67 - it is a onevalued menu and it is the current item 68 - or it has a selection value 69 */ 70 wattron(menu->win, (int)menu->back); 71 if (item->value || (item == menu->curitem)) 72 { 73 if (menu->marklen) 74 { 75 /* In a multi selection menu we use the fore attribute 76 for a selected marker that is not the current one. 77 This improves visualization of the menu, because now 78 always the 'normal' marker denotes the current 79 item. */ 80 if (!(menu->opt & O_ONEVALUE) && item->value && item != menu->curitem) 81 { 82 wattron(menu->win, (int)menu->fore); 83 isfore = TRUE; 84 } 85 waddstr(menu->win, menu->mark); 86 if (isfore) 87 { 88 wattron(menu->win, (int)menu->fore); 89 isfore = FALSE; 90 } 91 } 92 } 93 else /* otherwise we have to wipe out the marker area */ 94 for (ch = ' ', i = menu->marklen; i > 0; i--) 95 waddch(menu->win, ch); 96 wattroff(menu->win, (int)menu->back); 97 count += menu->marklen; 98 99 /* First we have to calculate the attribute depending on selectability 100 and selection status 101 */ 102 if (!(item->opt & O_SELECTABLE)) 103 { 104 wattron(menu->win, (int)menu->grey); 105 isgrey = TRUE; 106 } 107 else 108 { 109 if (item->value || item == menu->curitem) 110 { 111 wattron(menu->win, (int)menu->fore); 112 isfore = TRUE; 113 } 114 else 115 { 116 wattron(menu->win, (int)menu->back); 117 isback = TRUE; 118 } 119 } 120 121 waddnstr(menu->win, item->name.str, item->name.length); 122 name_len = _nc_Calculate_Text_Width(&(item->name)); 123 for (ch = ' ', i = menu->namelen - name_len; i > 0; i--) 124 { 125 waddch(menu->win, ch); 126 } 127 count += menu->namelen; 128 129 /* Show description if required and available */ 130 if ((menu->opt & O_SHOWDESC) && menu->desclen > 0) 131 { 132 int m = menu->spc_desc / 2; 133 int cy = -1, cx = -1; 134 int desc_len; 135 136 for (ch = ' ', i = 0; i < menu->spc_desc; i++) 137 { 138 if (i == m) 139 { 140 waddch(menu->win, menu->pad); 141 getyx(menu->win, cy, cx); 142 } 143 else 144 waddch(menu->win, ch); 145 } 146 if (item->description.length) 147 waddnstr(menu->win, item->description.str, item->description.length); 148 desc_len = _nc_Calculate_Text_Width(&(item->description)); 149 for (ch = ' ', i = menu->desclen - desc_len; i > 0; i--) 150 { 151 waddch(menu->win, ch); 152 } 153 count += menu->desclen + menu->spc_desc; 154 155 if (menu->spc_rows > 1) 156 { 157 int j, k, ncy, ncx; 158 159 assert(cx >= 0 && cy >= 0); 160 getyx(menu->win, ncy, ncx); 161 if (isgrey) 162 wattroff(menu->win, (int)menu->grey); 163 else if (isfore) 164 wattroff(menu->win, (int)menu->fore); 165 wattron(menu->win, (int)menu->back); 166 for (j = 1; j < menu->spc_rows; j++) 167 { 168 if ((item_y + j) < getmaxy(menu->win)) 169 { 170 wmove(menu->win, item_y + j, item_x); 171 for (k = 0; k < count; k++) 172 waddch(menu->win, ' '); 173 } 174 if ((cy + j) < getmaxy(menu->win)) 175 (void)mvwaddch(menu->win, cy + j, cx - 1, menu->pad); 176 } 177 wmove(menu->win, ncy, ncx); 178 if (!isback) 179 wattroff(menu->win, (int)menu->back); 180 } 181 } 182 183 /* Remove attributes */ 184 if (isfore) 185 wattroff(menu->win, (int)menu->fore); 186 if (isback) 187 wattroff(menu->win, (int)menu->back); 188 if (isgrey) 189 wattroff(menu->win, (int)menu->grey); 190 } 191 192 /*--------------------------------------------------------------------------- 193 | Facility : libnmenu 194 | Function : void _nc_Draw_Menu(const MENU *) 195 | 196 | Description : Display the menu in its windows 197 | 198 | Return Values : - 199 +--------------------------------------------------------------------------*/ 200 MENU_EXPORT(void) 201 _nc_Draw_Menu(const MENU *menu) 202 { 203 ITEM *item = menu->items[0]; 204 ITEM *lastvert; 205 ITEM *hitem; 206 chtype s_bkgd; 207 208 assert(item && menu->win); 209 210 s_bkgd = getbkgd(menu->win); 211 wbkgdset(menu->win, menu->back); 212 werase(menu->win); 213 wbkgdset(menu->win, s_bkgd); 214 215 lastvert = (menu->opt & O_NONCYCLIC) ? (ITEM *)0 : item; 216 217 if (item != NULL) 218 { 219 int y = 0; 220 221 do 222 { 223 ITEM *lasthor; 224 225 wmove(menu->win, y, 0); 226 227 hitem = item; 228 lasthor = (menu->opt & O_NONCYCLIC) ? (ITEM *)0 : hitem; 229 230 do 231 { 232 _nc_Post_Item(menu, hitem); 233 234 wattron(menu->win, (int)menu->back); 235 if (((hitem = hitem->right) != lasthor) && hitem) 236 { 237 int i, j, cy, cx; 238 chtype ch = ' '; 239 240 getyx(menu->win, cy, cx); 241 for (j = 0; j < menu->spc_rows; j++) 242 { 243 wmove(menu->win, cy + j, cx); 244 for (i = 0; i < menu->spc_cols; i++) 245 { 246 waddch(menu->win, ch); 247 } 248 } 249 wmove(menu->win, cy, cx + menu->spc_cols); 250 } 251 } 252 while (hitem && (hitem != lasthor)); 253 wattroff(menu->win, (int)menu->back); 254 255 item = item->down; 256 y += menu->spc_rows; 257 258 } 259 while (item && (item != lastvert)); 260 } 261 } 262 263 /*--------------------------------------------------------------------------- 264 | Facility : libnmenu 265 | Function : int post_menu(MENU* menu) 266 | 267 | Description : Post a menu to the screen. This makes it visible. 268 | 269 | Return Values : E_OK - success 270 | E_BAD_ARGUMENT - not a valid menu pointer 271 | E_SYSTEM_ERROR - error in lower layers 272 | E_NOT_CONNECTED - No items connected to menu 273 | E_BAD_STATE - Menu in userexit routine 274 | E_POSTED - Menu already posted 275 +--------------------------------------------------------------------------*/ 276 MENU_EXPORT(int) 277 post_menu(MENU *menu) 278 { 279 T((T_CALLED("post_menu(%p)"), (void *)menu)); 280 281 if (!menu) 282 RETURN(E_BAD_ARGUMENT); 283 284 if (menu->status & _IN_DRIVER) 285 RETURN(E_BAD_STATE); 286 287 if (menu->status & _POSTED) 288 RETURN(E_POSTED); 289 290 if (menu->items && *(menu->items)) 291 { 292 int h = 1 + menu->spc_rows * (menu->rows - 1); 293 294 WINDOW *win = Get_Menu_Window(menu); 295 int maxy = getmaxy(win); 296 297 if ((menu->win = newpad(h, menu->width))) 298 { 299 int y = (maxy >= h) ? h : maxy; 300 301 if (y >= menu->height) 302 y = menu->height; 303 if (!(menu->sub = subpad(menu->win, y, menu->width, 0, 0))) 304 RETURN(E_SYSTEM_ERROR); 305 } 306 else 307 RETURN(E_SYSTEM_ERROR); 308 309 if (menu->status & _LINK_NEEDED) 310 _nc_Link_Items(menu); 311 } 312 else 313 RETURN(E_NOT_CONNECTED); 314 315 SetStatus(menu, _POSTED); 316 317 if (!(menu->opt & O_ONEVALUE)) 318 { 319 ITEM **items; 320 321 for (items = menu->items; *items; items++) 322 { 323 (*items)->value = FALSE; 324 } 325 } 326 327 _nc_Draw_Menu(menu); 328 329 Call_Hook(menu, menuinit); 330 Call_Hook(menu, iteminit); 331 332 _nc_Show_Menu(menu); 333 334 RETURN(E_OK); 335 } 336 337 /*--------------------------------------------------------------------------- 338 | Facility : libnmenu 339 | Function : int unpost_menu(MENU*) 340 | 341 | Description : Detach menu from screen 342 | 343 | Return Values : E_OK - success 344 | E_BAD_ARGUMENT - not a valid menu pointer 345 | E_BAD_STATE - menu in userexit routine 346 | E_NOT_POSTED - menu is not posted 347 +--------------------------------------------------------------------------*/ 348 MENU_EXPORT(int) 349 unpost_menu(MENU *menu) 350 { 351 WINDOW *win; 352 353 T((T_CALLED("unpost_menu(%p)"), (void *)menu)); 354 355 if (!menu) 356 RETURN(E_BAD_ARGUMENT); 357 358 if (menu->status & _IN_DRIVER) 359 RETURN(E_BAD_STATE); 360 361 if (!(menu->status & _POSTED)) 362 RETURN(E_NOT_POSTED); 363 364 Call_Hook(menu, itemterm); 365 Call_Hook(menu, menuterm); 366 367 win = Get_Menu_Window(menu); 368 werase(win); 369 wsyncup(win); 370 371 assert(menu->sub); 372 delwin(menu->sub); 373 menu->sub = (WINDOW *)0; 374 375 assert(menu->win); 376 delwin(menu->win); 377 menu->win = (WINDOW *)0; 378 379 ClrStatus(menu, _POSTED); 380 381 RETURN(E_OK); 382 } 383 384 /* m_post.c ends here */ 385