1 /**************************************************************************** 2 * Copyright 2020-2021 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_item_new * 36 * Create and destroy menu items * 37 * Set and get marker string for menu * 38 ***************************************************************************/ 39 40 #include "menu.priv.h" 41 42 #if USE_WIDEC_SUPPORT 43 #if HAVE_WCTYPE_H 44 #include <wctype.h> 45 #endif 46 #endif 47 48 MODULE_ID("$Id: m_item_new.c,v 1.38 2021/06/17 21:26:02 tom Exp $") 49 50 /*--------------------------------------------------------------------------- 51 | Facility : libnmenu 52 | Function : bool Is_Printable_String(const char *s) 53 | 54 | Description : Checks whether or not the string contains only printable 55 | characters. 56 | 57 | Return Values : TRUE - if string is printable 58 | FALSE - if string contains non-printable characters 59 +--------------------------------------------------------------------------*/ 60 static bool 61 Is_Printable_String(const char *s) 62 { 63 int result = TRUE; 64 65 #if USE_WIDEC_SUPPORT 66 int count = (int)mbstowcs(0, s, 0); 67 wchar_t *temp = 0; 68 69 assert(s); 70 71 if (count > 0 72 && (temp = typeCalloc(wchar_t, (2 + (unsigned)count))) != 0) 73 { 74 int n; 75 76 mbstowcs(temp, s, (unsigned)count); 77 for (n = 0; n < count; ++n) 78 if (!iswprint((wint_t)temp[n])) 79 { 80 result = FALSE; 81 break; 82 } 83 free(temp); 84 } 85 #else 86 assert(s); 87 while (*s) 88 { 89 if (!isprint(UChar(*s))) 90 { 91 result = FALSE; 92 break; 93 } 94 s++; 95 } 96 #endif 97 return result; 98 } 99 100 /*--------------------------------------------------------------------------- 101 | Facility : libnmenu 102 | Function : ITEM *new_item(char *name, char *description) 103 | 104 | Description : Create a new item with name and description. Return 105 | a pointer to this new item. 106 | N.B.: an item must(!) have a name. 107 | 108 | Return Values : The item pointer or NULL if creation failed. 109 +--------------------------------------------------------------------------*/ 110 MENU_EXPORT(ITEM *) 111 new_item(const char *name, const char *description) 112 { 113 ITEM *item; 114 115 T((T_CALLED("new_item(\"%s\", \"%s\")"), 116 name ? name : "", 117 description ? description : "")); 118 119 if (!name || (*name == '\0') || !Is_Printable_String(name)) 120 { 121 item = (ITEM *)0; 122 SET_ERROR(E_BAD_ARGUMENT); 123 } 124 else 125 { 126 item = typeCalloc(ITEM, 1); 127 128 if (item) 129 { 130 T((T_CREATE("item %p"), (void *)item)); 131 *item = _nc_Default_Item; /* hope we have struct assignment */ 132 133 item->name.length = (unsigned short)strlen(name); 134 item->name.str = name; 135 136 if (description && (*description != '\0') && 137 Is_Printable_String(description)) 138 { 139 item->description.length = (unsigned short)strlen(description); 140 item->description.str = description; 141 } 142 else 143 { 144 item->description.length = 0; 145 item->description.str = (char *)0; 146 } 147 } 148 else 149 SET_ERROR(E_SYSTEM_ERROR); 150 } 151 returnItem(item); 152 } 153 154 /*--------------------------------------------------------------------------- 155 | Facility : libnmenu 156 | Function : int free_item(ITEM *item) 157 | 158 | Description : Free the allocated storage for this item. 159 | N.B.: a connected item can't be freed. 160 | 161 | Return Values : E_OK - success 162 | E_BAD_ARGUMENT - invalid value has been passed 163 | E_CONNECTED - item is still connected to a menu 164 +--------------------------------------------------------------------------*/ 165 MENU_EXPORT(int) 166 free_item(ITEM *item) 167 { 168 T((T_CALLED("free_item(%p)"), (void *)item)); 169 170 if (!item) 171 RETURN(E_BAD_ARGUMENT); 172 173 if (item->imenu) 174 RETURN(E_CONNECTED); 175 176 free(item); 177 178 RETURN(E_OK); 179 } 180 181 /*--------------------------------------------------------------------------- 182 | Facility : libnmenu 183 | Function : int set_menu_mark( MENU *menu, const char *mark ) 184 | 185 | Description : Set the mark string used to indicate the current 186 | item (single-valued menu) or the selected items 187 | (multi-valued menu). 188 | The mark argument may be NULL, in which case no 189 | marker is used. 190 | This might be a little bit tricky, because this may 191 | affect the geometry of the menu, which we don't allow 192 | if it is already posted. 193 | 194 | Return Values : E_OK - success 195 | E_BAD_ARGUMENT - an invalid value has been passed 196 | E_SYSTEM_ERROR - no memory to store mark 197 +--------------------------------------------------------------------------*/ 198 MENU_EXPORT(int) 199 set_menu_mark(MENU *menu, const char *mark) 200 { 201 short l; 202 203 T((T_CALLED("set_menu_mark(%p,%s)"), (void *)menu, _nc_visbuf(mark))); 204 205 if (mark && (*mark != '\0') && Is_Printable_String(mark)) 206 l = (short)strlen(mark); 207 else 208 l = 0; 209 210 if (menu) 211 { 212 char *old_mark = menu->mark; 213 unsigned short old_status = menu->status; 214 215 if (menu->status & _POSTED) 216 { 217 /* If the menu is already posted, the geometry is fixed. Then 218 we can only accept a mark with exactly the same length */ 219 if (menu->marklen != l) 220 RETURN(E_BAD_ARGUMENT); 221 } 222 menu->marklen = l; 223 if (l) 224 { 225 menu->mark = strdup(mark); 226 if (menu->mark) 227 { 228 if (menu != &_nc_Default_Menu) 229 SetStatus(menu, _MARK_ALLOCATED); 230 } 231 else 232 { 233 menu->mark = old_mark; 234 menu->marklen = (short)((old_mark != 0) ? strlen(old_mark) : 0); 235 RETURN(E_SYSTEM_ERROR); 236 } 237 } 238 else 239 menu->mark = (char *)0; 240 241 if ((old_status & _MARK_ALLOCATED) && old_mark) 242 free(old_mark); 243 244 if (menu->status & _POSTED) 245 { 246 _nc_Draw_Menu(menu); 247 _nc_Show_Menu(menu); 248 } 249 else 250 { 251 /* Recalculate the geometry */ 252 _nc_Calculate_Item_Length_and_Width(menu); 253 } 254 } 255 else 256 { 257 returnCode(set_menu_mark(&_nc_Default_Menu, mark)); 258 } 259 RETURN(E_OK); 260 } 261 262 /*--------------------------------------------------------------------------- 263 | Facility : libnmenu 264 | Function : char *menu_mark(const MENU *menu) 265 | 266 | Description : Return a pointer to the marker string 267 | 268 | Return Values : The marker string pointer or NULL if no marker defined 269 +--------------------------------------------------------------------------*/ 270 MENU_EXPORT(const char *) 271 menu_mark(const MENU *menu) 272 { 273 T((T_CALLED("menu_mark(%p)"), (const void *)menu)); 274 returnPtr(Normalize_Menu(menu)->mark); 275 } 276 277 /* m_item_new.c */ 278