1 /**************************************************************************** 2 * Copyright (c) 1998-2005,2006 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 29 /**************************************************************************** 30 * Author: Juergen Pfeifer, 1995,1997 * 31 ****************************************************************************/ 32 33 /*************************************************************************** 34 * Module m_item_new * 35 * Create and destroy menu items * 36 * Set and get marker string for menu * 37 ***************************************************************************/ 38 39 #include "menu.priv.h" 40 41 #if USE_WIDEC_SUPPORT 42 #if HAVE_WCTYPE_H 43 #include <wctype.h> 44 #endif 45 #endif 46 47 MODULE_ID("$Id: m_item_new.c,v 1.27 2006/12/17 19:47:09 tom Exp $") 48 49 /*--------------------------------------------------------------------------- 50 | Facility : libnmenu 51 | Function : bool Is_Printable_String(const char *s) 52 | 53 | Description : Checks whether or not the string contains only printable 54 | characters. 55 | 56 | Return Values : TRUE - if string is printable 57 | FALSE - if string contains non-printable characters 58 +--------------------------------------------------------------------------*/ 59 static bool 60 Is_Printable_String(const char *s) 61 { 62 int result = TRUE; 63 64 #if USE_WIDEC_SUPPORT 65 int count = mbstowcs(0, s, 0); 66 wchar_t *temp = 0; 67 68 assert(s); 69 70 if (count > 0 71 && (temp = typeCalloc(wchar_t, (2 + (unsigned)count))) != 0) 72 { 73 int n; 74 75 mbstowcs(temp, s, (unsigned)count); 76 for (n = 0; n < count; ++n) 77 if (!iswprint((wint_t) temp[n])) 78 { 79 result = FALSE; 80 break; 81 } 82 free(temp); 83 } 84 #else 85 assert(s); 86 while (*s) 87 { 88 if (!isprint(UChar(*s))) 89 { 90 result = FALSE; 91 break; 92 } 93 s++; 94 } 95 #endif 96 return result; 97 } 98 99 /*--------------------------------------------------------------------------- 100 | Facility : libnmenu 101 | Function : ITEM *new_item(char *name, char *description) 102 | 103 | Description : Create a new item with name and description. Return 104 | a pointer to this new item. 105 | N.B.: an item must(!) have a name. 106 | 107 | Return Values : The item pointer or NULL if creation failed. 108 +--------------------------------------------------------------------------*/ 109 NCURSES_EXPORT(ITEM *) 110 new_item(const char *name, const char *description) 111 { 112 ITEM *item; 113 114 T((T_CALLED("new_item(\"%s\", \"%s\")"), 115 name ? name : "", 116 description ? description : "")); 117 118 if (!name || (*name == '\0') || !Is_Printable_String(name)) 119 { 120 item = (ITEM *) 0; 121 SET_ERROR(E_BAD_ARGUMENT); 122 } 123 else 124 { 125 item = (ITEM *) calloc(1, sizeof(ITEM)); 126 if (item) 127 { 128 *item = _nc_Default_Item; /* hope we have struct assignment */ 129 130 item->name.length = strlen(name); 131 item->name.str = name; 132 133 if (description && (*description != '\0') && 134 Is_Printable_String(description)) 135 { 136 item->description.length = strlen(description); 137 item->description.str = description; 138 } 139 else 140 { 141 item->description.length = 0; 142 item->description.str = (char *)0; 143 } 144 } 145 else 146 SET_ERROR(E_SYSTEM_ERROR); 147 } 148 returnItem(item); 149 } 150 151 /*--------------------------------------------------------------------------- 152 | Facility : libnmenu 153 | Function : int free_item(ITEM *item) 154 | 155 | Description : Free the allocated storage for this item. 156 | N.B.: a connected item can't be freed. 157 | 158 | Return Values : E_OK - success 159 | E_BAD_ARGUMENT - invalid value has been passed 160 | E_CONNECTED - item is still connected to a menu 161 +--------------------------------------------------------------------------*/ 162 NCURSES_EXPORT(int) 163 free_item(ITEM * item) 164 { 165 T((T_CALLED("free_item(%p)"), item)); 166 167 if (!item) 168 RETURN(E_BAD_ARGUMENT); 169 170 if (item->imenu) 171 RETURN(E_CONNECTED); 172 173 free(item); 174 175 RETURN(E_OK); 176 } 177 178 /*--------------------------------------------------------------------------- 179 | Facility : libnmenu 180 | Function : int set_menu_mark( MENU *menu, const char *mark ) 181 | 182 | Description : Set the mark string used to indicate the current 183 | item (single-valued menu) or the selected items 184 | (multi-valued menu). 185 | The mark argument may be NULL, in which case no 186 | marker is used. 187 | This might be a little bit tricky, because this may 188 | affect the geometry of the menu, which we don't allow 189 | if it is already posted. 190 | 191 | Return Values : E_OK - success 192 | E_BAD_ARGUMENT - an invalid value has been passed 193 | E_SYSTEM_ERROR - no memory to store mark 194 +--------------------------------------------------------------------------*/ 195 NCURSES_EXPORT(int) 196 set_menu_mark(MENU * menu, const char *mark) 197 { 198 unsigned l; 199 200 T((T_CALLED("set_menu_mark(%p,%s)"), menu, _nc_visbuf(mark))); 201 202 if (mark && (*mark != '\0') && Is_Printable_String(mark)) 203 l = strlen(mark); 204 else 205 l = 0; 206 207 if (menu) 208 { 209 char *old_mark = menu->mark; 210 unsigned short old_status = menu->status; 211 212 if (menu->status & _POSTED) 213 { 214 /* If the menu is already posted, the geometry is fixed. Then 215 we can only accept a mark with exactly the same length */ 216 if (menu->marklen != (int)l) 217 RETURN(E_BAD_ARGUMENT); 218 } 219 menu->marklen = l; 220 if (l) 221 { 222 menu->mark = (char *)malloc(l + 1); 223 if (menu->mark) 224 { 225 strcpy(menu->mark, mark); 226 if (menu != &_nc_Default_Menu) 227 menu->status |= _MARK_ALLOCATED; 228 } 229 else 230 { 231 menu->mark = old_mark; 232 RETURN(E_SYSTEM_ERROR); 233 } 234 } 235 else 236 menu->mark = (char *)0; 237 238 if ((old_status & _MARK_ALLOCATED) && old_mark) 239 free(old_mark); 240 241 if (menu->status & _POSTED) 242 { 243 _nc_Draw_Menu(menu); 244 _nc_Show_Menu(menu); 245 } 246 else 247 { 248 /* Recalculate the geometry */ 249 _nc_Calculate_Item_Length_and_Width(menu); 250 } 251 } 252 else 253 { 254 returnCode(set_menu_mark(&_nc_Default_Menu, mark)); 255 } 256 RETURN(E_OK); 257 } 258 259 /*--------------------------------------------------------------------------- 260 | Facility : libnmenu 261 | Function : char *menu_mark(const MENU *menu) 262 | 263 | Description : Return a pointer to the marker string 264 | 265 | Return Values : The marker string pointer or NULL if no marker defined 266 +--------------------------------------------------------------------------*/ 267 NCURSES_EXPORT(const char *) 268 menu_mark(const MENU * menu) 269 { 270 T((T_CALLED("menu_mark(%p)"), menu)); 271 returnPtr(Normalize_Menu(menu)->mark); 272 } 273 274 /* m_item_new.c */ 275