/*
 * 6502 Based Virtual Computer
 *	Copyright © 2011  Scott C. Duensing <scott@jaegertech.com>
 *
 *	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.,
 *	51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */


// Pretend we're a singleton.
var util = new utils();


function utils() {

	GLOBAL_DATA = {};

	// --- Public methods.

	this.hexToRgb = function(hex) {
	    // Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
	    var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
	    hex = hex.replace(shorthandRegex, function(m, r, g, b) {
	        return r + r + g + g + b + b;
	    });
	    var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
	    return result ? {
	        r: parseInt(result[1], 16),
	        g: parseInt(result[2], 16),
	        b: parseInt(result[3], 16)
	    } : null;
		// alert( hexToRgb("#0033ff").g ); // "51";
	};

	this.loadPasteBox = function(controlId) {
		var t = document.getElementById(controlId).value;
		GLOBAL_DATA.pasteData = t;
		GLOBAL_DATA.pastePos = 0;
		GLOBAL_DATA.pasteTimer = window.setInterval(function() {
			if (computer.memory.readByte(MM_KEYBOARD_CHARACTER) === 0) {
				var char = GLOBAL_DATA.pasteData.charCodeAt(GLOBAL_DATA.pastePos++);
				if (char == 10) char = 13;
				computer.memory.writeByte(MM_KEYBOARD_CHARACTER, char);
			}
			if (GLOBAL_DATA.pastePos == GLOBAL_DATA.pasteData.length) {
				window.clearInterval(GLOBAL_DATA.pasteTimer);
			}
		}, 3);
	};

}