1 /**************************************************************************** 2 * Copyright 2020 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 1.32 2020/02/02 23:34:34 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 NCURSES_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 int desc_len; 62 63 assert(menu->win); 64 65 getyx(menu->win, item_y, item_x); 66 67 /* We need a marker iff 68 - it is a onevalued menu and it is the current item 69 - or it has a selection value 70 */ 71 wattron(menu->win, (int)menu->back); 72 if (item->value || (item == menu->curitem)) 73 { 74 if (menu->marklen) 75 { 76 /* In a multi selection menu we use the fore attribute 77 for a selected marker that is not the current one. 78 This improves visualization of the menu, because now 79 always the 'normal' marker denotes the current 80 item. */ 81 if (!(menu->opt & O_ONEVALUE) && item->value && item != menu->curitem) 82 { 83 wattron(menu->win, (int)menu->fore); 84 isfore = TRUE; 85 } 86 waddstr(menu->win, menu->mark); 87 if (isfore) 88 { 89 wattron(menu->win, (int)menu->fore); 90 isfore = FALSE; 91 } 92 } 93 } 94 else /* otherwise we have to wipe out the marker area */ 95 for (ch = ' ', i = menu->marklen; i > 0; i--) 96 waddch(menu->win, ch); 97 wattroff(menu->win, (int)menu->back); 98 count += menu->marklen; 99 100 /* First we have to calculate the attribute depending on selectability 101 and selection status 102 */ 103 if (!(item->opt & O_SELECTABLE)) 104 { 105 wattron(menu->win, (int)menu->grey); 106 isgrey = TRUE; 107 } 108 else 109 { 110 if (item->value || item == menu->curitem) 111 { 112 wattron(menu->win, (int)menu->fore); 113 isfore = TRUE; 114 } 115 else 116 { 117 wattron(menu->win, (int)menu->back); 118 isback = TRUE; 119 } 120 } 121 122 waddnstr(menu->win, item->name.str, item->name.length); 123 name_len = _nc_Calculate_Text_Width(&(item->name)); 124 for (ch = ' ', i = menu->namelen - name_len; i > 0; i--) 125 { 126 waddch(menu->win, ch); 127 } 128 count += menu->namelen; 129 130 /* Show description if required and available */ 131 if ((menu->opt & O_SHOWDESC) && menu->desclen > 0) 132 { 133 int m = menu->spc_desc / 2; 134 int cy = -1, cx = -1; 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 NCURSES_EXPORT(void) 201 _nc_Draw_Menu(const MENU * menu) 202 { 203 ITEM *item = menu->items[0]; 204 ITEM *lasthor, *lastvert; 205 ITEM *hitem; 206 int y = 0; 207 chtype s_bkgd; 208 209 assert(item && menu->win); 210 211 s_bkgd = getbkgd(menu->win); 212 wbkgdset(menu->win, menu->back); 213 werase(menu->win); 214 wbkgdset(menu->win, s_bkgd); 215 216 lastvert = (menu->opt & O_NONCYCLIC) ? (ITEM *) 0 : item; 217 218 do 219 { 220 wmove(menu->win, y, 0); 221 222 hitem = item; 223 lasthor = (menu->opt & O_NONCYCLIC) ? (ITEM *) 0 : hitem; 224 225 do 226 { 227 _nc_Post_Item(menu, hitem); 228 229 wattron(menu->win, (int)menu->back); 230 if (((hitem = hitem->right) != lasthor) && hitem) 231 { 232 int i, j, cy, cx; 233 chtype ch = ' '; 234 235 getyx(menu->win, cy, cx); 236 for (j = 0; j < menu->spc_rows; j++) 237 { 238 wmove(menu->win, cy + j, cx); 239 for (i = 0; i < menu->spc_cols; i++) 240 { 241 waddch(menu->win, ch); 242 } 243 } 244 wmove(menu->win, cy, cx + menu->spc_cols); 245 } 246 } 247 while (hitem && (hitem != lasthor)); 248 wattroff(menu->win, (int)menu->back); 249 250 item = item->down; 251 y += menu->spc_rows; 252 253 } 254 while (item && (item != lastvert)); 255 } 256 257 /*--------------------------------------------------------------------------- 258 | Facility : libnmenu 259 | Function : int post_menu(MENU* menu) 260 | 261 | Description : Post a menu to the screen. This makes it visible. 262 | 263 | Return Values : E_OK - success 264 | E_BAD_ARGUMENT - not a valid menu pointer 265 | E_SYSTEM_ERROR - error in lower layers 266 | E_NOT_CONNECTED - No items connected to menu 267 | E_BAD_STATE - Menu in userexit routine 268 | E_POSTED - Menu already posted 269 +--------------------------------------------------------------------------*/ 270 NCURSES_EXPORT(int) 271 post_menu(MENU * menu) 272 { 273 T((T_CALLED("post_menu(%p)"), (void *)menu)); 274 275 if (!menu) 276 RETURN(E_BAD_ARGUMENT); 277 278 if (menu->status & _IN_DRIVER) 279 RETURN(E_BAD_STATE); 280 281 if (menu->status & _POSTED) 282 RETURN(E_POSTED); 283 284 if (menu->items && *(menu->items)) 285 { 286 int y; 287 int h = 1 + menu->spc_rows * (menu->rows - 1); 288 289 WINDOW *win = Get_Menu_Window(menu); 290 int maxy = getmaxy(win); 291 292 if ((menu->win = newpad(h, menu->width))) 293 { 294 y = (maxy >= h) ? h : maxy; 295 if (y >= menu->height) 296 y = menu->height; 297 if (!(menu->sub = subpad(menu->win, y, menu->width, 0, 0))) 298 RETURN(E_SYSTEM_ERROR); 299 } 300 else 301 RETURN(E_SYSTEM_ERROR); 302 303 if (menu->status & _LINK_NEEDED) 304 _nc_Link_Items(menu); 305 } 306 else 307 RETURN(E_NOT_CONNECTED); 308 309 SetStatus(menu, _POSTED); 310 311 if (!(menu->opt & O_ONEVALUE)) 312 { 313 ITEM **items; 314 315 for (items = menu->items; *items; items++) 316 { 317 (*items)->value = FALSE; 318 } 319 } 320 321 _nc_Draw_Menu(menu); 322 323 Call_Hook(menu, menuinit); 324 Call_Hook(menu, iteminit); 325 326 _nc_Show_Menu(menu); 327 328 RETURN(E_OK); 329 } 330 331 /*--------------------------------------------------------------------------- 332 | Facility : libnmenu 333 | Function : int unpost_menu(MENU*) 334 | 335 | Description : Detach menu from screen 336 | 337 | Return Values : E_OK - success 338 | E_BAD_ARGUMENT - not a valid menu pointer 339 | E_BAD_STATE - menu in userexit routine 340 | E_NOT_POSTED - menu is not posted 341 +--------------------------------------------------------------------------*/ 342 NCURSES_EXPORT(int) 343 unpost_menu(MENU * menu) 344 { 345 WINDOW *win; 346 347 T((T_CALLED("unpost_menu(%p)"), (void *)menu)); 348 349 if (!menu) 350 RETURN(E_BAD_ARGUMENT); 351 352 if (menu->status & _IN_DRIVER) 353 RETURN(E_BAD_STATE); 354 355 if (!(menu->status & _POSTED)) 356 RETURN(E_NOT_POSTED); 357 358 Call_Hook(menu, itemterm); 359 Call_Hook(menu, menuterm); 360 361 win = Get_Menu_Window(menu); 362 werase(win); 363 wsyncup(win); 364 365 assert(menu->sub); 366 delwin(menu->sub); 367 menu->sub = (WINDOW *)0; 368 369 assert(menu->win); 370 delwin(menu->win); 371 menu->win = (WINDOW *)0; 372 373 ClrStatus(menu, _POSTED); 374 375 RETURN(E_OK); 376 } 377 378 /* m_post.c ends here */ 379