wmlib/menu.c

   1 /* menu.c - menu interface functions
   2  *
   3  * WMlib - WindowMaker application programming interface
   4  *
   5  * Copyright (C) 1997 Alfredo K. Kojima
   6  *
   7  *  This library is free software; you can redistribute it and/or
   8  *  modify it under the terms of the GNU Library General Public
   9  *  License as published by the Free Software Foundation; either
  10  *  version 2 of the License, or (at your option) any later version.
  11  *
  12  *  This library is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  *  Library General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU Library General Public
  18  *  License along with this library; if not, write to the Free
  19  *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <X11/Xlib.h>
  26 #include <X11/Xutil.h>
  27
  28 #include "WMaker.h"
  29 #include "app.h"
  30 #include "menu.h"
  31
  32
  33 WMMenu*
  34 WMMenuCreate(WMAppContext *app, char *title)
  35 {
  36     wmMenu *menu;
  37
  38     if (strlen(title)>255)
  39       return NULL;
  40
  41     menu = malloc(sizeof(wmMenu));
  42     if (!menu)
  43       return NULL;
  44
  45     menu->appcontext = app;
  46     menu->parent = NULL;
  47     menu->title = title;
  48     menu->entries = NULL;
  49     menu->first = NULL;
  50
  51     menu->realized = False;
  52     menu->code = app->last_menu_tag++;
  53
  54     menu->entryline = malloc(strlen(title)+32);
  55     menu->entryline2 = malloc(32);
  56     if (!menu->entryline || !menu->entryline2) {
  57         if (menu->entryline)
  58           free(menu->entryline);
  59         free(menu);
  60         return NULL;
  61     }
  62     sprintf(menu->entryline, "%i %i %s", wmBeginMenu, menu->code, title);
  63     sprintf(menu->entryline2, "%i %i", wmEndMenu, menu->code);
  64     return menu;
  65 }
  66
  67
  68 int
  69 WMMenuAddItem(WMMenu *menu, char *text, WMMenuAction action,
  70               void *clientData, WMFreeFunction freedata, char *rtext)
  71 {
  72     wmMenuEntry *entry;
  73
  74     /* max size of right side text */
  75     if (rtext && strlen(rtext)>4)
  76       return -1;
  77
  78     /* max size of menu text */
  79     if (strlen(text)>255)
  80       return -1;
  81
  82     entry = malloc(sizeof(wmMenuEntry));
  83     if (!entry)
  84       return -1;
  85
  86     entry->entryline = malloc(strlen(text)+100);
  87     if (!entry->entryline) {
  88         free(menu);
  89         return -1;
  90     }
  91
  92     if (menu->entries)
  93       entry->order = menu->entries->order + 1;
  94     else {
  95         entry->order = 0;
  96         menu->first = entry;
  97     }
  98     entry->next = NULL;
  99     entry->prev = menu->entries;
 100     if (menu->entries)
 101       menu->entries->next = entry;
 102     menu->entries = entry;
 103
 104     entry->menu = menu;
 105     entry->text = text;
 106     entry->shortcut = rtext;
 107     entry->callback = action;
 108     entry->clientData = clientData;
 109     entry->free = freedata;
 110     entry->tag = menu->appcontext->last_menu_tag++;
 111     entry->cascade = NULL;
 112     entry->enabled = True;
 113
 114
 115     if (!rtext)
 116       sprintf(entry->entryline, "%i %i %i %i %s", wmNormalItem,
 117               menu->code, entry->tag, True, text);
 118     else
 119       sprintf(entry->entryline, "%i %i %i %i %s %s", wmDoubleItem,
 120               menu->code, entry->tag, True, rtext, text);
 121     return entry->tag;
 122 }
 123
 124
 125
 126 int
 127 WMMenuAddSubmenu(WMMenu *menu, char *text, WMMenu *submenu)
 128 {
 129     wmMenuEntry *entry;
 130
 131     /* max size of menu text */
 132     if (strlen(text)>255)
 133       return -1;
 134
 135     entry = malloc(sizeof(wmMenuEntry));
 136     if (!entry)
 137       return -1;
 138
 139     entry->entryline = malloc(strlen(text)+100);
 140     if (!entry->entryline) {
 141         free(menu);
 142         return -1;
 143     }
 144
 145     if (menu->entries)
 146       entry->order = menu->entries->order + 1;
 147     else {
 148         entry->order = 0;
 149         menu->first = entry;
 150     }
 151     entry->next = NULL;
 152     entry->prev = menu->entries;
 153     if (menu->entries)
 154       menu->entries->next = entry;
 155     menu->entries = entry;
 156     entry->menu = menu;
 157     entry->text = text;
 158     entry->shortcut = NULL;
 159     entry->callback = NULL;
 160     entry->clientData = NULL;
 161     entry->tag = menu->appcontext->last_menu_tag++;
 162     entry->cascade = submenu;
 163     entry->enabled = True;
 164
 165     sprintf(entry->entryline, "%i %i %i %i %i %s", wmSubmenuItem,
 166             menu->code, entry->tag, True, submenu->code, text);
 167     return entry->tag;
 168 }
 169
 170
 171 static int
 172 countItems(WMMenu *menu)
 173 {
 174     wmMenuEntry *entry = menu->first;
 175     int c;
 176
 177     c = 1;
 178     while (entry) {
 179         c++;
 180         if (entry->cascade) {
 181             c += countItems(entry->cascade);
 182         }
 183         entry = entry->next;
 184     }
 185     c++;
 186     return c;
 187 }
 188
 189
 190 static void
 191 addItems(char **slist, int *index, WMMenu *menu)
 192 {
 193     wmMenuEntry *entry = menu->first;
 194
 195     slist[(*index)++] = menu->entryline;
 196     while (entry) {
 197         slist[(*index)++] = entry->entryline;
 198         if (entry->cascade) {
 199             addItems(slist, index, entry->cascade);
 200         }
 201         entry = entry->next;
 202     }
 203     slist[(*index)++] = menu->entryline2;
 204 }
 205
 206
 207 static Atom
 208 getatom(Display *dpy)
 209 {
 210     static Atom atom=0;
 211
 212     if (atom==0) {
 213         atom = XInternAtom(dpy, WMMENU_PROPNAME, False);
 214     }
 215     return atom;
 216 }
 217
 218 int
 219 WMRealizeMenus(WMAppContext *app)
 220 {
 221     int i, count;
 222     char **slist;
 223     XTextProperty text_prop;
 224
 225     if (!app->main_menu)
 226       return False;
 227
 228     /* first count how many menu items there are */
 229     count = countItems(app->main_menu);
 230     if (count==0)
 231       return True;
 232
 233     count++;
 234     slist = malloc(count*sizeof(char*));
 235     if (!slist) {
 236         return False;
 237     }
 238
 239     slist[0] = "WMMenu 0";
 240     i = 1;
 241     addItems(slist, &i, app->main_menu);
 242
 243     if (!XStringListToTextProperty(slist, i, &text_prop)) {
 244         free(slist);
 245         return False;
 246     }
 247     free(slist);
 248     XSetTextProperty(app->dpy, app->main_window, &text_prop,
 249                      getatom(app->dpy));
 250
 251     XFree(text_prop.value);
 252
 253     return True;
 254 }
 255
 256