/*  MikMod example player
	(c) 1999 Miodrag Vallat and others - see file AUTHORS for
	complete list.

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.
 
	This program 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 General Public License for more details.
 
	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
	02111-1307, USA.
*/

/*==============================================================================

  $Id: mmenu.c,v 1.3 1999/07/05 04:00:02 miod Exp $

  Menu functions

==============================================================================*/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include "display.h"
#include <mikmod.h>
#include "player.h"
#include "mmenu.h"
#include "mwindow.h"
#include "mdialog.h"

static BOOL menu_is_sub(MENTRY *entry)
{
	char *pos;
	return((entry->text[strlen(entry->text)-1]=='>')&&
			(!((pos=strchr(entry->text,'%'))&&
			  (*(pos+1)!='%'))));
}

static BOOL menu_is_option(MENTRY *entry)
{
	char *pos;
	return((pos=strchr(entry->text,'%'))&&
			(*(pos+1)=='o'));
}

static BOOL menu_is_toggle(MENTRY *entry)
{
	char *pos;
	return((pos=strchr(entry->text,'%'))&&
			(*(pos+1)=='c'));
}

static BOOL menu_is_int(MENTRY *entry)
{
	char *pos;
	return((pos=strchr(entry->text,'%'))&&
			(*(pos+1)=='d'));
}

static BOOL menu_is_str(MENTRY *entry)
{
	char *pos;
	return((pos=strchr(entry->text,'%'))&&
			(*(pos+1)=='s'));
}

static BOOL menu_has_sub(MENTRY *entry)
{
	return menu_is_str(entry)||menu_is_int(entry)||
		   menu_is_option(entry)||menu_is_sub(entry);
}

static char *get_text(MENTRY *entry,int width)
{
	char help[50],sub[50],*start,*pos;
	int i;

	if (entry) {
		if ((pos=strchr(entry->text,'%'))) {
			if (*(pos+1)=='c')
				sprintf(storage,entry->text,(long)(entry->data)?'x':' ');
			else if ((*(pos+1)=='o')&&(start=strchr(entry->text,'|'))) {
				char *s_pos=NULL;
				int max=0;

				strncpy(help,entry->text,start-entry->text);
				help[start-entry->text]='\0';
				help[1+pos-entry->text]='s';

				start++;
				i=(long)(entry->data);
				pos=start;
				while (start) {
					if (!i) s_pos=pos;
					if ((start=strchr(pos,'|'))) {
						if (start-pos>max) max=start-pos;
						pos=start+1;
					}
					i--;
				}
				if (strlen(pos)>max) max=strlen(pos);
				i=0;
				while (s_pos&&(*s_pos)&&(*s_pos!='|'))
					sub[i++]=*s_pos++;
				while (i<max) sub[i++]=' ';
				sub[i]='\0';
				sprintf(storage,help,sub);
			} else if ((*(pos+1)=='d'||*(pos+1)=='s') &&
					  (start=strchr(entry->text,'|'))) {
				char *right=strrchr(start,'|') + 1;
				strncpy(help,entry->text,pos+1-entry->text);
				help[pos+1-entry->text]='\0';
				if (*(pos+1)=='d') {
					sprintf(sub,"%d",(int)strlen(right));
					strcat(help,sub);
				} else
					strcat(help,right);
				i=strlen(help);
				strncat(help,pos+1,start-pos-1);
				help[i+start-pos-1]='\0';
				if (*(pos+1)=='d')
					sprintf(storage,help,(long)(entry->data));
				else {
					char ch;
					sscanf(right,"%d",&i);
					pos=(char*)(entry->data);
					ch=pos[i];
					pos[i]='\0';
					sprintf(storage,help,pos);
					pos[i]=ch;
				}
			} else if (*(pos+1)=='%') { /* '...%%...' -> '...%...' */
				strncpy(storage,entry->text,pos-entry->text);
				strcpy(&storage[pos-entry->text],&entry->text[pos-entry->text+1]);
			} else
				strcpy(storage,entry->text);
		} else
			strcpy(storage,entry->text);
		i=strlen(storage);
		while (i<width)
			storage[i++]=' ';
		storage[i]='\0';
		return storage;
	}
	return NULL;
}

static void menu_do_repaint(MWINDOW *win,int diff)
{
	MMENU *m=win->data;
	int height,t,hl_pos;
	char *pos,*txt,hl[2];
	
	height=win->height;
	if (height>m->count) height=m->count;
	m->cur+=diff;
	if (m->cur<0) m->cur=m->count-1;
	else if (m->cur>=m->count) m->cur=0;

	while (m->entries[m->cur].text[0]=='-') m->cur+=diff>0?1:-1;

	if (m->cur<m->first) m->first=m->cur;
	else if (m->cur>=m->first+height) m->first=m->cur-height+1;

	hl[1]='\0';
	win_attrset(A_REVERSE);
	for (t=m->first;t<m->count && t<(height+m->first);t++) {
		txt=get_text(&m->entries[t],win->width);
		hl_pos=-1;
		if ((pos=strchr(txt,'&'))) {
			if ((*(pos+1)!='&')) {
				hl_pos=pos-txt;
				hl[0]=*(pos+1);
			}
			for (++pos;*pos;pos++) *(pos-1)=*pos;
			*(pos-1)=' ';
			if (hl_pos>=0) txt[hl_pos]='\0';
		}
		if (t==m->cur) {
			win_attrset(A_NORMAL);
			win_print(0,t-m->first,txt);
			if (hl_pos>=0) {
				win_attrset(A_REVERSE);
				win_print(hl_pos,t-m->first,hl);
				win_attrset(A_NORMAL);
				win_print(hl_pos+1,t-m->first,&txt[hl_pos+1]);
			}
			win_status(m->entries[t].help);
			win_attrset(A_REVERSE);
		} else if (m->entries[t].text[0]=='-')
			win_line(0,win->width-1,t-m->first);
		else {
			if (hl_pos>=0) {
				win_print(0,t-m->first,txt);
				win_attrset(A_NORMAL);
				win_print(hl_pos,t-m->first,hl);
				win_attrset(A_REVERSE);
				win_print(hl_pos+1,t-m->first,&txt[hl_pos+1]);
			} else
				win_print(0,t-m->first,txt);
		}
	}
	win_attrset(A_NORMAL);
}

static BOOL menu_repaint(MWINDOW *win)
{
	menu_do_repaint(win,0);
	return 1;
}

static void handle_opt_menu(MMENU *menu)
{
	int i;
	MENTRY *entry=menu->data;
	
	entry->data=(void*)(long)menu->cur;
	menu_close(menu);
	for (i=0;i<menu->count;i++)
		free(menu->entries[i].text);
	free(menu->entries);
	free(menu);
}

static void handle_input_str(int button,void *input,void *data)
{
	if (!button) strcpy(*((char**)data),input);
}

static void handle_input_int(int button,void *input,void *data)
{
	if (!button) *((int*)data)=atoi(input);
}

static BOOL menu_do_select(MWINDOW *win)
{
	MMENU *m=win->data;
	MENTRY *entry=&m->entries[m->cur];

	if (menu_is_toggle(entry)) {
		entry->data=(void*)(long)(!((long)(entry->data)));
		menu_do_repaint(win,0);
		return 1;
	} else if (menu_is_option(entry)) {
		char *pos,*start;
		MENTRY *sub;
		MMENU *new=malloc(sizeof(MMENU));
		int cnt=1,i;

		start=strchr(entry->text,'|');
		pos=++start;
		while ((pos=strchr(pos,'|'))) {
			pos++;
			cnt++;
		}
		new->cur=(long)(entry->data);
		new->first=0;
		new->count=cnt;
		new->key_left=1;
		new->entries=malloc(sizeof(MENTRY)*cnt);
		new->handle_select=handle_opt_menu;
		new->win=NULL;
		new->data=entry;
		sub=new->entries;
		for (i=0;i<cnt;i++) {
			if (!(pos=strchr(start,'|')))
				pos=&start[strlen(start)];
			sub->text=malloc(sizeof(char)*(pos-start+1));
			strncpy(sub->text,start,pos-start);
			sub->text[pos-start]='\0';
			sub->data=NULL;
			sub->help=entry->help;
			start=pos+1;
			sub++;
		}
		menu_open(new,win->x+win->width+1,win->y+m->cur-m->first);
		return 1;
	} else if (menu_is_str(entry)) {
		char *msg=NULL,*start,*pos;
		int length=0;

		start=strchr(entry->text,'|') + 1;
		pos=strchr(start,'|');

		msg=malloc(sizeof(char)*(pos-start+1));
		strncpy(msg,start,pos-start);
		msg[pos-start]='\0';
		sscanf(pos+1,"%d",&length);

		dlg_input_str(msg,(char*)(entry->data),length,
		              handle_input_str,&entry->data);
		free(msg);
	} else if (menu_is_int(entry)) {
		char *msg=NULL,*start,*pos;
		int min=0,max=0;

		start=strchr(entry->text,'|') + 1;
		pos=strchr(start,'|');

		msg=malloc(sizeof(char)*(pos-start+1));
		strncpy(msg,start,pos-start);
		msg[pos-start]='\0';
		sscanf(pos+1,"%d|%d",&min,&max);

		dlg_input_int(msg,(long)(entry->data),min,max,
		              handle_input_int,&entry->data);
		free(msg);
	} else if (menu_is_sub(entry)) {
		MMENU *sub=entry->data;
		
		sub->cur=sub->first=0;
		menu_open(sub,win->x+win->width+1,win->y+m->cur-m->first);
		return 1;
	}
	return 0;
}

void menu_close(MMENU *menu)
{
	int i;
	
	for (i=0;i<menu->count;i++)
		if (menu_is_sub(&menu->entries[i]))
			menu_close(menu->entries[i].data);
	if (menu->win) {
		win_status(NULL);
		win_close_win(menu->win);
		menu->win=NULL;
	}
}

static BOOL menu_handle_key(MWINDOW *win,int ch)
{
	MMENU *menu=win->data;
	char *pos;
	int i,key;
	
	if ((ch<256) &&(isalpha(ch))) ch=toupper(ch);
	switch (ch) {
		case KEY_DOWN:
			menu_do_repaint(win,1);
			break;
		case KEY_UP:
			menu_do_repaint(win,-1);
			break;
		case KEY_LEFT:
			if (menu->key_left) menu_close(menu);
			break;
		case KEY_RIGHT:
			if (menu_has_sub(&menu->entries[menu->cur]))
				menu_do_select(win);
			break;
		case KEY_ENTER:
		case '\r':
			if (!menu_do_select(win))
				if (menu->handle_select)
					menu->handle_select(menu);
			break;
		default:
			for (i=0;i<menu->count;i++) {
				key=0;
				if ((pos=strchr(menu->entries[i].text,'&')))
					key=toupper((int)(*(pos+1)));
				if (key==ch) {
					menu_do_repaint(win,i-menu->cur);
					if (!menu_do_select(win))
						if (menu->handle_select)
							menu->handle_select(menu);
					return 1;
				}
			}
			return 0;
		}
	return 1;
}

static void menu_handle_resize(MWINDOW *win,int dx,int dy)
{
	int m_y,m_width,m_height;
	MMENU *menu=win->data;

	win_get_size_max(&m_y,&m_width,&m_height);
	m_width-=2;m_height-=2;

	if (win->x+win->width>m_width) {
		win->x=m_width-win->width+1;
		if (win->x<1) win->x=1;
	}
	if (win->y+win->height-m_y>m_height ||
		win->y+menu->count-m_y>m_height) {
		win->y=m_height-menu->count+m_y+1;
		if (win->y <= m_y) win->y=m_y+1;
	}
	if (win->height<menu->count) win->height=menu->count;
	if (win->height>m_height) win->height=m_height;
	if (menu->first+win->height>menu->count)
		menu->first=menu->count-win->height;
	if (menu->first<0) menu->first=0;
}

void menu_open(MMENU *menu,int x,int y)
{
	MWINDOW *win;
	char *entry;
	int m_y,m_width,m_height,width=0;

	/* get max. width of entries */
	for (m_y=0;m_y<menu->count;m_y++) {
		entry=get_text(&menu->entries[m_y],0);
		m_width=strlen(entry);
		if (strchr(entry,'&')) m_width--;
		if (m_width>width) width=m_width;
	}

	win_get_size_max(&m_y,&m_width,&m_height);
	m_width-=2;m_height-=2;

	if (x+width-1>m_width) x=m_width-width+1;
	if (x<1) x=1;
	if (y+menu->count-m_y-1>m_height) y=m_height-menu->count+m_y+1;
	if (y<m_y) y=m_y+1;

	menu->win=win_open(x,y,width,menu->count,1,NULL);
	win_set_repaint(menu_repaint);
	win_set_handle_key(menu_handle_key);
	win_set_resize(0,menu_handle_resize);
	win_set_data((void*)menu);

	win=win_get_window();
	if (menu->first+win->height>menu->count)
		menu->first=menu->count-win->height;
	if (menu->first<0) menu->first=0;
	menu_repaint(win);
}

/* ex:set ts=4: */