/* keyborad handling for text fields */

#include <SDL.h>
#include "keybinput.h"

static int keybinput_oldkey = 0;

void keybinput_new (_keybinput *ki) {
	int i;
	
	for (i = 0; i < 255; i++)
		ki->text[i] = 0;
	ki->curpos = 0;
	ki->len = 0;
}


int keybinput_loop (_keybinput *ki, SDL_Event *event) {
	int key = 0, keyu = 0;

	ki->changed = 0;

	if (event->type == SDL_KEYUP)
		keybinput_oldkey = 0;
	
	if (event->type == SDL_KEYDOWN && keybinput_oldkey != event->key.keysym.sym) {
		key = keybinput_oldkey = event->key.keysym.sym;
		keyu = event->key.keysym.unicode;
	
		if (key == 8) { // BACKSPACE
			if (ki->curpos > 0) {
				ki->curpos--;
				ki->text[ki->curpos] = 0;
				ki->changed = 1;
			}
		}
		else if ((keyu >= 32 && keyu <= 126) || (keyu >= 128 && keyu <= 255)) { // International keyboard support
			if (ki->curpos < 255) {
				ki->text[ki->curpos++] = event->key.keysym.unicode;
				ki->text[ki->curpos] = 0;
				ki->changed = 1;
			}
		}
		ki->len = strlen (ki->text);
	}
	
	if (key == SDLK_RETURN)
		return 1;
	
	if (key == SDLK_ESCAPE)
		return -1;
	
	return 0;
}