//
// pprompt.js - simple window library.
//
// Copyright (C) 2005 Masaki Komagata <komagata@gmail.com>
//     All rights reserved.
//     This is free software with ABSOLUTELY NO WARRANTY.
//
// You can redistribute it and/or modify it under the terms of
// the GNU General Public License version 2.
//
var PPrompt = {
alert: function(msg, options) {
	var options = this._extend(this.getOptions(), options || {});
	this.addOverlay();

	var pwindow = this.getWindow(options.height, options.width);

	// msg
	var pmsg = document.createElement('div');
	pmsg.className = 'pmsg';
	pmsg.style.padding = '6px';
	pmsg.appendChild(document.createTextNode(msg));

	pwindow.appendChild(pmsg);

	// buttons
	var pbuttons = document.createElement('div');
	pbuttons.id = 'pbuttons';
	pbuttons.style.padding = '6px';

	// ok
	var pbuttonOk = document.createElement('button');
	pbuttonOk.className = 'pbutton';
	pbuttonOk.appendChild(document.createTextNode(options.labelOk));
	pbuttonOk.onclick = options.onOk;
	pbuttons.appendChild(pbuttonOk);

	pwindow.appendChild(pbuttons);
	document.body.appendChild(pwindow);
},
confirm: function(msg, options) {
	var options = this._extend(this.getOptions(), options || {});
	this.addOverlay();

	var pwindow = this.getWindow(options.height, options.width);

	// msg
	var pmsg = document.createElement('div');
	pmsg.className = 'pmsg';
	pmsg.style.padding = '6px';
	pmsg.appendChild(document.createTextNode(msg));
	pwindow.appendChild(pmsg);

	// buttons
	var pbuttons = document.createElement('div');
	pbuttons.id = 'pbuttons';
	pbuttons.style.padding = '6px';

	// ok
	var pbuttonOk = document.createElement('button');
	pbuttonOk.className = 'pbutton';
	pbuttonOk.appendChild(document.createTextNode(options.labelOk));
	pbuttonOk.onclick = options.onOk;
	pbuttons.appendChild(pbuttonOk);

	// cancel
	var pbuttonCancel = document.createElement('button');
	pbuttonCancel.className = 'pbutton';
	pbuttonCancel.appendChild(document.createTextNode(options.labelCancel));
	pbuttonCancel.onclick = options.onCancel;
	pbuttons.appendChild(pbuttonCancel);

	pwindow.appendChild(pbuttons);
	document.body.appendChild(pwindow);
},
prompt: function(msg, options) {
	var opt = this.getOptions();
	opt.height = 100;
	var options = this._extend(opt, options || {});
	this.addOverlay();

	var pwindow = this.getWindow(options.height, options.width);

	// msg
	var pmsg = document.createElement('div');
	pmsg.className = 'pmsg';
	pmsg.style.padding = '6px';
	pmsg.appendChild(document.createTextNode(msg));
	pwindow.appendChild(pmsg);

	// buttons
	var pbuttons = document.createElement('div');
	pbuttons.id = 'pbuttons';
	pbuttons.style.padding = '6px';

	// input
	var pinput = document.createElement('input');
	pinput.id = 'pinput';
	pinput.style.width = '260px';
	pinput.setAttribute('type', 'text');
	pwindow.appendChild(pinput);

	// ok
	var pbuttonOk = document.createElement('button');
	pbuttonOk.className = 'pbutton';
	pbuttonOk.appendChild(document.createTextNode(options.labelOk));
	pbuttonOk.onclick = options.onOk;
	pbuttons.appendChild(pbuttonOk);

	// cancel
	var pbuttonCancel = document.createElement('button');
	pbuttonCancel.className = 'pbutton';
	pbuttonCancel.appendChild(document.createTextNode(options.labelCancel));
	pbuttonCancel.onclick = options.onCancel;
	pbuttons.appendChild(pbuttonCancel);

	pwindow.appendChild(pbuttons);

	document.body.appendChild(pwindow);
},
addOverlay: function() {
	var poverlay = document.createElement('div');
	poverlay.id = 'poverlay';
	poverlay.style.top = '0px';
	poverlay.style.left = '0px';
	poverlay.style.position = 'absolute';
	poverlay.style.background = '#fff';

	this._setOpacity(poverlay, 0.5);
	var pageSize = this._getPageSize();
	poverlay.style.height = pageSize.pageHeight+'px';
	poverlay.style.width = '100%';
	document.body.appendChild(poverlay);
},
removeOverlay: function() {
	document.body.removeChild(document.getElementById('poverlay'));
},
getWindow: function(height, width) {
	document.body.style.padding = '0';
	var pwindow = document.createElement('div');
	pwindow.id = 'pwindow';
	var pageSize = this._getPageSize();
	var pos = this._realOffset(document.body);
	pwindow.style.top = (pageSize.windowHeight/2 - height/2 + pos[1])+'px';
	pwindow.style.left = (pageSize.windowWidth/2 - width/2 + pos[0])+'px';
	pwindow.style.height = height+'px';
	pwindow.style.width = width+'px';
	pwindow.style.position = 'absolute';
	pwindow.style.background = '#fff';
	pwindow.style.border = '6px solid #e9e9f3';
	pwindow.style.padding = '6px';
	pwindow.style.textAlign = 'center';
	return pwindow;
},
close: function() {
	this.removeOverlay();
	document.body.removeChild(document.getElementById('pwindow'));
},
getOptions: function() {
	return {
		'height'      : 70,
		'width'       : 300,
		'labelOk'     : 'OK',
		'labelCancel' : 'Cancel',
		'onOk'        : function() {
			PPrompt.close();
		},
		'onCancel'    : function() {
			PPrompt.close();
		}
	};
},
_extend: function(destination, source) {
	for (var property in source) {
		destination[property] = source[property];
	}
	return destination;
},
_realOffset: function(element) {
	var valueT = 0, valueL = 0;
	do {
		valueT += element.scrollTop  || 0;
		valueL += element.scrollLeft || 0;
		element = element.parentNode;
	} while (element);
	return [valueL, valueT];
},
_setOpacity: function(element, value){
	if (typeof element == 'string')
		element= $(element);
	if (value == 1){
		element.style.opacity = (/Gecko/.test(navigator.userAgent) && !/Konqueror|Safari|KHTML/.test(navigator.userAgent)) ? 0.999999 : 1.0 ;
		if(/MSIE/.test(navigator.userAgent) && !window.opera)
			element.style.filter = element.style.filter.replace(/alpha\([^\)]*\)/gi,'');
	} else {
		if(value < 0.00001) value = 0;
		element.style.opacity = value;
		if(/MSIE/.test(navigator.userAgent) && !window.opera)
			element.style.filter = element.style.filter.replace(/alpha\([^\)]*\)/gi,'') + 'alpha(opacity='+value*100+')';
	}
	return element;
},
_getPageSize: function() {
	var xScroll, yScroll;
	if (window.innerHeight && window.scrollMaxY) {
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){
		// all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else {
		// Explorer Mac...would also work in Explorer 6 Strict,
		// Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}

	var windowWidth, windowHeight;
	if (self.innerHeight) {      // all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement
			   && document.documentElement.clientHeight) {
		// Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}

	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else {
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}

	return {
		'pageWidth':pageWidth,
		'pageHeight':pageHeight,
		'windowWidth':windowWidth,
		'windowHeight':windowHeight,
		'yScroll':yScroll,
		'xScroll':xScroll
		};
}
};