/*
 * Copyright (c) 1997 - 2001 Hansjrg Malthaner
 *
 * This file is part of the Simutrans project under the artistic licence.
 * (see licence.txt)
 */

#include "gui_button.h"

#include "../../simdebug.h"
#include "../../simcolor.h"
#include "../../simgraph.h"
#include "../../simevent.h"
#include "../../simwin.h"

#include "../../besch/reader/obj_reader.h"

#include "../../dataobj/translator.h"

#include "../../simskin.h"
#include "../../besch/skin_besch.h"
#include "../../utils/cstring_t.h"

#define STATE_MASK (127)
static const char *empty="";

/*
 * Hajo: image numbers of button skins
 */
static image_id square_button_pushed = IMG_LEER;
static image_id square_button_normal = IMG_LEER;
static image_id arrow_left_pushed = IMG_LEER;
static image_id arrow_left_normal = IMG_LEER;
static image_id arrow_right_pushed = IMG_LEER;
static image_id arrow_right_normal = IMG_LEER;
static image_id arrow_up_pushed = IMG_LEER;
static image_id arrow_up_normal = IMG_LEER;
static image_id arrow_down_pushed = IMG_LEER;
static image_id arrow_down_normal = IMG_LEER;

// these are optional: buttons made out of graphics
static image_id b_cap_left = IMG_LEER;
static image_id b_body = IMG_LEER;
static image_id b_cap_right = IMG_LEER;

static image_id b_cap_left_p = IMG_LEER;
static image_id b_body_p = IMG_LEER;
static image_id b_cap_right_p = IMG_LEER;


#define RB_LEFT_BUTTON (201)
#define RB_BODY_BUTTON (202)
#define RB_RIGHT_BUTTON (203)

/**
 * Lazy button image number init
 * @author Hj. Malthaner
 */
static void init_button_images()
{
	if(square_button_pushed==IMG_LEER  &&  obj_reader_t::has_been_init) {

		square_button_normal = skinverwaltung_t::window_skin->gib_bild(6)->gib_nummer();
		square_button_pushed = skinverwaltung_t::window_skin->gib_bild(7)->gib_nummer();

		arrow_left_normal = skinverwaltung_t::window_skin->gib_bild(8)->gib_nummer();
		arrow_left_pushed = skinverwaltung_t::window_skin->gib_bild(9)->gib_nummer();

		arrow_right_normal = skinverwaltung_t::window_skin->gib_bild(10)->gib_nummer();
		arrow_right_pushed = skinverwaltung_t::window_skin->gib_bild(11)->gib_nummer();

		b_cap_left = skinverwaltung_t::window_skin->gib_bild(12)->gib_nummer();
		b_cap_right = skinverwaltung_t::window_skin->gib_bild(13)->gib_nummer();
		b_body = skinverwaltung_t::window_skin->gib_bild(14)->gib_nummer();

		b_cap_left_p = skinverwaltung_t::window_skin->gib_bild(15)->gib_nummer();
		b_cap_right_p = skinverwaltung_t::window_skin->gib_bild(16)->gib_nummer();
		b_body_p = skinverwaltung_t::window_skin->gib_bild(17)->gib_nummer();

		arrow_up_normal = skinverwaltung_t::window_skin->gib_bild(18)->gib_nummer();
		arrow_up_pushed = skinverwaltung_t::window_skin->gib_bild(19)->gib_nummer();

		arrow_down_normal = skinverwaltung_t::window_skin->gib_bild(20)->gib_nummer();
		arrow_down_pushed = skinverwaltung_t::window_skin->gib_bild(21)->gib_nummer();
	}
}


/**
 * Displays the different button types
 * @author Hj. Malthaner
 */
static void display_button_image(sint16 x, sint16 y, int number, bool pushed)
{
	image_id button = IMG_LEER;

	switch (number) {
		case SQUARE_BUTTON:
			button = pushed ? square_button_pushed : square_button_normal;
			break;
		case ARROW_LEFT:
			button = pushed ? arrow_left_pushed : arrow_left_normal;
			break;
		case ARROW_RIGHT:
			button = pushed ? arrow_right_pushed : arrow_right_normal;
			break;
		case ARROW_UP:
			button = pushed ? arrow_up_pushed : arrow_up_normal;
			break;
		case ARROW_DOWN:
			button = pushed ? arrow_down_pushed : arrow_down_normal;
			break;
		case RB_LEFT_BUTTON:
			button = pushed ? b_cap_left_p : b_cap_left;
			break;
		case RB_BODY_BUTTON:
			button = pushed ? b_body_p : b_body;
			break;
		case RB_RIGHT_BUTTON:
			button = pushed ? b_cap_right_p : b_cap_right;
			break;
	}

	display_color_img(button, x, y, 0, false, true);
}



// draw a rectangular button
static void draw_roundbutton(sint16 x, sint16 y, sint16 w, sint16 h, bool pressed)
{
	if(b_cap_left!=IMG_LEER  &&  h==14) {
		const sint16 lw = skinverwaltung_t::window_skin->gib_bild(12)->get_pic()->w;
		const sint16 rw = skinverwaltung_t::window_skin->gib_bild(13)->get_pic()->w;
		// first the center (may need extra clipping)
		if(w-lw-rw<64) {
			struct clip_dimension cl=display_gib_clip_wh();
			display_setze_clip_wh(cl.x, cl.y, max(0,min(x+w-rw-cl.x,cl.w)), cl.h );
			display_button_image(x+lw, y, RB_BODY_BUTTON, pressed);
			display_setze_clip_wh(cl.x, cl.y, cl.w, cl.h );
		}
		else {
			// wider buttons
			for( sint16 j=0;  j+64<w-rw-lw;  j+=64) {
				display_button_image(x+j+lw, y, RB_BODY_BUTTON, pressed);
			}
			display_button_image(x+w-rw-64, y, RB_BODY_BUTTON, pressed);
		}
		// now the begin and end ...
		display_button_image(x, y, RB_LEFT_BUTTON, pressed);
		display_button_image(x+w-rw, y, RB_RIGHT_BUTTON, pressed);
	}
	else {
		// draw the button conventionally from boxes
		// fallback, if nothing defined
		if (pressed) {
			display_fillbox_wh_clip(x, y, w, 1, MN_GREY1, true);
			display_fillbox_wh_clip(x+1, y+1, w-2, 1, COL_BLACK, true);
			display_fillbox_wh_clip(x+2, y+2, w-2, h-4, MN_GREY1, true);
			display_fillbox_wh_clip(x, y+h-2, w, 1, MN_GREY3, true);
			display_fillbox_wh_clip(x, y+h-1, w, 1, COL_WHITE, true);
			display_vline_wh_clip(x+w-2, y+1, h-2, MN_GREY4, true);
			display_vline_wh_clip(x+w-1, y+1, h-1, COL_WHITE, true);
			display_vline_wh_clip(x, y, h, MN_GREY1, true);
			display_vline_wh_clip(x+1, y+1, h-2, COL_BLACK, true);
		}
		else {
			display_fillbox_wh_clip(x, y, w, 1, COL_WHITE, true);
			display_fillbox_wh_clip(x+1, y+1, w-2, 1, MN_GREY4, true);
			display_fillbox_wh_clip(x+2, y+2, w-2, h-4, MN_GREY3, true);
			display_fillbox_wh_clip(x, y+h-2, w, 1, MN_GREY1, true);
			display_fillbox_wh_clip(x, y+h-1, w, 1, COL_BLACK, true);
			display_vline_wh_clip(x+w-2, y+1, h-2, MN_GREY1, true);
			display_vline_wh_clip(x+w-1, y+1, h-1, COL_BLACK, true);
			display_vline_wh_clip(x, y, h, COL_WHITE, true);
			display_vline_wh_clip(x+1, y+1, h-2, MN_GREY4, true);
		}
	}
}



button_t::button_t()
{
	b_no_translate = false;
	translated_text = text = empty;
	pressed = false;
	type = box;
	foreground = COL_BLACK;
	translated_tooltip = tooltip = NULL;
	background = MN_GREY3;
	b_enabled = true;
	init_button_images();
}


void button_t::init(enum type typ, const char *text, koord pos, koord size)
{
	b_no_translate = false;
	setze_typ(typ);
	setze_text(text);
	setze_pos(pos);
	translated_tooltip = tooltip = NULL;
	if(size != koord::invalid) {
		setze_groesse(size);
	}
}


// set type. this includes size for specified buttons.
void button_t::setze_typ(enum type t)
{
	type = t;
	switch (type&STATE_MASK) {
		case square:
		case arrowleft:
		case repeatarrowleft:
		case arrowright:
		case repeatarrowright:
		case arrowup:
		case arrowdown:
			groesse.x = 10;
			groesse.y = 10;
			break;
		case roundbox:
			groesse.y = 14;
		break;
			default:
			break;
	}
}


/**
 * Setzt den im Button angezeigten Text
 * @author Hj. Malthaner
 */
void
button_t::setze_text(const char * text)
{
	this->text = text;
	translated_text = b_no_translate ? text : translator::translate(text);
}



/**
 * Sets the tooltip of this button
 * @author Hj. Malthaner
 */
void button_t::set_tooltip(const char * t)
{
	if(t==NULL) {
		translated_tooltip = tooltip = NULL;
	}
	else {
		tooltip = t;
		translated_tooltip = b_no_translate ? tooltip : translator::translate(tooltip);
	}
}



bool
button_t::getroffen(int x,int y) {
	bool hit=gui_komponente_t::getroffen(x, y);
	if(pressed  &&  !hit  &&  type<=STATE_MASK) {
		// moved away
		pressed = 0;
	}
	return hit;
}



/**
 * Events werden hiermit an die GUI-Komponenten
 * gemeldet
 * @author Hj. Malthaner
 */
void button_t::infowin_event(const event_t *ev)
{
	if(ev->ev_class==INFOWIN  &&  ev->ev_code==WIN_OPEN) {
		if(text) {
			translated_text = b_no_translate ? text : translator::translate(text);
		}
		if(tooltip) {
			translated_tooltip = b_no_translate ? tooltip : translator::translate(tooltip);
		}
	}

	// Hajo: we ignore resize events, they shouldn't make us
	// pressed or upressed
	if(!b_enabled  ||  IS_WINDOW_RESIZE(ev)) {
		return;
	}

	if(type<=STATE_MASK) {
		// Hajo: check button state, if we should look depressed
		pressed  =  (ev->button_state==1)  &&  b_enabled;
	}

	if(IS_LEFTRELEASE(ev)) {
		call_listeners( (long)0 );
	}
	else if(IS_LEFTREPEAT(ev)) {
		if((type&STATE_MASK)>=repeatarrowleft) {
			call_listeners( (long)1 );
		}
	}
}



// draw button. x,y is top left of window.
void button_t::zeichnen(koord offset)
{
	int bx = offset.x + pos.x;
	int by = offset.y + pos.y;

	int bw = groesse.x;
	int bh = groesse.y;

	switch (type&STATE_MASK) {

		case box: // old, 4-line box
		{
			if (pressed) {
				display_ddd_box_clip(bx, by, bw, bh, MN_GREY0, MN_GREY4);
				display_fillbox_wh_clip(bx+1, by+1, bw-2, bh-2, background, false);
			}
			else {
				display_ddd_box_clip(bx, by, bw, bh, COL_GREY6, COL_GREY3);
				display_fillbox_wh_clip(bx+1, by+1, bw-2, bh-2, background, false);
			}
			int len = proportional_string_width(translated_text);
			display_proportional_clip(bx+max((bw-len)/2,0),by+(bh-large_font_height)/2, translated_text, ALIGN_LEFT, b_enabled ? foreground : COL_GREY4, true);
		}
		break;

		case roundbox: // new box with round corners
			draw_roundbutton( bx, by, bw, bh, pressed );
			display_proportional_clip(bx+(bw>>1),by+(bh-large_font_height)/2, translated_text, ALIGN_MIDDLE, b_enabled ? foreground : COL_GREY4, true);
			break;

		case square: // little square in front of text
			display_button_image(bx, by, SQUARE_BUTTON, pressed);
			display_proportional_clip(bx+16,by+(12-large_font_height)/2, translated_text, ALIGN_LEFT, b_enabled ? foreground : COL_GREY4, true);
			break;

		case arrowleft:
		case repeatarrowleft:
			display_button_image(bx, by, ARROW_LEFT, pressed);
			break;

		case arrowright:
		case repeatarrowright:
			display_button_image(bx, by, ARROW_RIGHT, pressed);
			break;

		case arrowup:
			display_button_image(bx, by, ARROW_UP, pressed);
			break;

		case arrowdown:
			display_button_image(bx, by, ARROW_DOWN, pressed);
			break;

		case scrollbar:
			// new 3d-look scrollbar knob
			mark_rect_dirty_wc(bx, by, bx+bw-1, by+bh-1);
#if 1
			// use own 3D like routines
			if (pressed) {
				display_fillbox_wh_clip(bx+2, by+2, bw-3, bh-3, MN_GREY1, false);
				display_vline_wh_clip  (bx+2, by+3, 2,   MN_GREY0, false);
				display_fillbox_wh_clip(bx+2, by+2, 3,1, MN_GREY0, false);
				display_vline_wh_clip  (bx+1, by+2, bh-3,   COL_BLACK, false);
				display_fillbox_wh_clip(bx+1, by+1, bw-2,1, COL_BLACK, false);
				display_vline_wh_clip  (bx+bw-2, by+3, bh-5,   MN_GREY2, false);
				display_fillbox_wh_clip(bx+3, by+bh-2, bw-4,1, MN_GREY2, false);
				display_vline_wh_clip  (bx, by+1, bh-2, MN_GREY0, false);
				display_fillbox_wh_clip(bx, by, bw-1,1, MN_GREY0, false);
				display_vline_wh_clip  (bx+bw-1, by, bh,   COL_WHITE, false);
				display_fillbox_wh_clip(bx, by+bh-1, bw,1, COL_WHITE, false);
			}
			else {
				display_fillbox_wh_clip(bx+1, by+1, bw-3, bh-3, MN_GREY3, false);
				display_vline_wh_clip  (bx+bw-3, by+bh-5, 2,   MN_GREY1, false);
				display_fillbox_wh_clip(bx+bw-5, by+bh-3, 3,1, MN_GREY1, false);
				display_vline_wh_clip  (bx+1, by+2, bh-5,   MN_GREY4, false);
				display_fillbox_wh_clip(bx+1, by+1, bw-4,1, MN_GREY4, false);
				display_vline_wh_clip  (bx+bw-2, by+1, bh-3,   MN_GREY0, false);
				display_fillbox_wh_clip(bx+1, by+bh-2, bw-2,1, MN_GREY0, false);
				display_vline_wh_clip  (bx, by+1, bh-2, COL_WHITE, false);
				display_fillbox_wh_clip(bx, by, bw-1,1, COL_WHITE, false);
				display_vline_wh_clip  (bx+bw-1, by, bh,   COL_BLACK, false);
				display_fillbox_wh_clip(bx, by+bh-1, bw,1, COL_BLACK, false);
			}
#else
			draw_roundbutton( bx, by, bw, bh, pressed );
#endif
		break;
	}

	if(translated_tooltip &&  getroffen( gib_maus_x()-offset.x, gib_maus_y()-offset.y )) {
		win_set_tooltip(gib_maus_x() + 16, gib_maus_y() - 16, translated_tooltip );
	}
}