#include "text_widget.h"

#include "string.h"
#include <stddef.h>

static text_widget_vtable_t const text_widget_vtable = {
	{
		text_widget_draw,
		widget_get_focus,
		widget_model_to_screen,
		widget_contains_coordinate,
		widget_on_mouse_down,
		widget_on_mouse_up,
		widget_on_mouse_move,
		text_widget_on_key_down,
		widget_on_key_up
	},
	text_widget_set_text
};

void text_widget_init( text_widget_t *widget, widget_t *parent, const int x, const int y, const int w, const int h, const vga_color_t background_color, const char *s )
{
	memset( widget, 0, sizeof( text_widget_t ) );

	widget_init( &widget->base, parent, x, y, w, h, background_color );	

	text_widget_set_text( widget, s );
	
	widget->base.focusable = true;

	((widget_t *)widget)->vtable = (widget_vtable_t *)&text_widget_vtable;
}

void text_widget_draw( void *obj, graphics_context_t *context )
{
	text_widget_t *widget = obj;

	widget_draw( obj, context );

	int x = 0;
	int y = 0;
	int w = 0;
	int h = 0;

	((widget_t *)widget)->vtable->model_to_screen( widget, &x, &y );

	for( const char *p = widget->s; *p != '\0'; p++ ) {
		vga_draw_char( context, *p, x + w, y + h,
			((widget_t *)widget)->background_color,
			VGA_COLOR_WHITE );
		w += 9;
		if( w >= ((widget_t *)widget)->w - 10 ) {
			h += 16;
			w = 0;
		}
	}

}

void text_widget_set_text( void *obj, const char *s )
{
	text_widget_t *widget = obj;

	strlcpy( widget->s, s, TEXT_WIDGET_MAX_TEXT_SIZE );
}

void text_widget_on_key_down( void *obj, char c )
{
	text_widget_t *widget = obj;

	if( strlen( widget->s ) < TEXT_WIDGET_MAX_TEXT_SIZE - 1 ) {
		widget->s[strlen( widget->s )] = c;
		widget->s[strlen( widget->s )+1] = '\0';
	}
}