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//
// "$Id: Fl_Menu_add.cxx,v 1.4 1998/12/02 16:15:12 mike Exp $"
//
// Menu utilities for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to "fltk-bugs@easysw.com".
//
// Methods to alter the menu in an Fl_Menu_ widget.
// This code is seperated so that it is not linked in if not used.
// These functions are for emulation of Forms and for dynamically
// changing the menus. They are in this source file so they are
// not linked in if not used, which is what will happen if the
// the program only uses constant menu tables.
// Not at all guaranteed to be Forms compatable, especially with any
// string with a % sign in it!
#include <FL/Fl_Menu_.H>
#include <string.h>
#include <stdlib.h>
int fl_old_shortcut(const char* s) {
if (!s || !*s) return 0;
int n = 0;
if (*s == '#') {n |= FL_ALT; s++;}
if (*s == '+') {n |= FL_SHIFT; s++;}
if (*s == '^') {n |= FL_CTRL; s++;}
return n | *s;
}
// always allocate this much initially:
#define INITIAL_MENU_SIZE 15
// as menu array size passes through each power of two, the memory
// array allocated is doubled in size:
static Fl_Menu_Item* incr_array(Fl_Menu_Item* array, int size) {
if (size < INITIAL_MENU_SIZE) return array;
if ((size+1) & size) return array; // not a power of 2
Fl_Menu_Item* newarray = new Fl_Menu_Item[size*2+1];
for (int i = 0; i <= size; i++) newarray[i] = array[i];
delete[] array;
return newarray;
}
// if this local pointer is set, array is reallocated and put here:
static Fl_Menu_Item** alloc;
int Fl_Menu_Item::add(
const char *text,
int shortcut,
Fl_Callback *cb,
void *data,
int flags)
{
Fl_Menu_Item *array = this;
Fl_Menu_Item *m = this;
const char *p;
char *q;
char buf[1024];
int size = array->size();
int flags1 = 0;
char* item;
for (;;) { /* do all the supermenus: */
/* fill in the buf with name, changing \x to x: */
q = buf;
for (p=text; *p && *p != '/'; *q++ = *p++) if (*p=='\\') p++;
*q = 0;
item = buf;
if (*item == '_') {item++; flags1 = FL_MENU_DIVIDER;}
if (*p != '/') break; /* not a menu title */
text = p+1; /* point at item title */
/* find a matching menu title: */
for (; m->text; m = m->next())
if (m->flags&FL_SUBMENU && !strcmp(item,m->text)) break;
if (!m->text) { /* create a new menu */
if (alloc) {
int n = m-array;
array = incr_array(array,size);
array = incr_array(array,size+1);
*alloc = array;
m = array+n;
}
memmove(m+2,m,sizeof(Fl_Menu_Item)*(array+size-m));
m->text = strdup(item);
m->shortcut_ = 0;
m->callback_ = 0;
m->user_data_ = 0;
m->flags = FL_SUBMENU|flags1;
m->labeltype_ = m->labelfont_ = m->labelsize_ = m->labelcolor_ = 0;
(m+1)->text = 0;
size += 2;
}
m++; /* go into the menu */
flags1 = 0;
}
/* find a matching menu item: */
for (; m->text; m = m->next())
if (!strcmp(m->text,item)) break;
if (!m->text) { /* add a new menu item */
if (alloc) {
int n = m-array;
*alloc = array = incr_array(array,size);
m = array+n;
}
memmove(m+1,m,sizeof(Fl_Menu_Item)*(array+size-m));
size++;
m->text = strdup(item);
}
/* fill it in */
m->shortcut_ = shortcut;
m->callback_ = cb;
m->user_data_ = data;
m->flags = flags|flags1;
m->labeltype_ = m->labelfont_ = m->labelsize_ = m->labelcolor_ = 0;
return m-array;
}
int Fl_Menu_::add(const char *t, int s, Fl_Callback *c,void *v,int f) {
int n = value_ ? value_ - menu_ : 0;
if (!menu_) {
alloc = 1;
menu_ = new Fl_Menu_Item[INITIAL_MENU_SIZE];
menu_[0].text = 0;
}
if (alloc) ::alloc = &menu_;
int r = menu_->add(t,s,c,v,f);
::alloc = 0;
if (value_) value_ = menu_+n;
return r;
}
int Fl_Menu_::add(const char *str) {
char buf[128];
int r = 0;
while (*str) {
int shortcut = 0;
char *c;
for (c = buf; *str && *str != '|'; str++) {
if (*str == '\t') {*c++ = 0; shortcut = fl_old_shortcut(str);}
else *c++ = *str;
}
*c = 0;
r = add(buf, shortcut, 0, 0, 0);
if (*str) str++;
}
return r;
}
void Fl_Menu_::replace(int i, const char *str) {
if (i<0 || i>=size()) return;
if (alloc) free((void *)menu_[i].text);
menu_[i].text = strdup(str);
}
void Fl_Menu_::remove(int i) {
int n = size();
if (i<0 || i>=n) return;
if (alloc) free((void *)menu_[i].text);
memmove(&menu_[i],&menu_[i+1],(n-i)*sizeof(Fl_Menu_Item));
}
void Fl_Menu_::clear() {
for (int i = size(); i--;)
if (menu_[i].text) free((void*)menu_[i].text);
if (alloc) {
delete[] menu_;
menu_ = 0;
alloc = 0;
} else if (menu_) {
menu_[0].text = 0;
value_ = menu_;
}
}
//
// End of "$Id: Fl_Menu_add.cxx,v 1.4 1998/12/02 16:15:12 mike Exp $".
//
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