// Simple Set Clipboard System

// Author: Joseph Huckaby

var ZeroClipboard = {

	version: "1.0.7",

	clients: {}, // registered upload clients on page, indexed by id

	moviePath: 'ZeroClipboard.swf', // URL to movie

	nextId: 1, // ID of next movie

	$: function(thingy) {

		// simple DOM lookup utility function

		if (typeof(thingy) == 'string') thingy = document.getElementById(thingy);

		if (!thingy.addClass) {

			// extend element with a few useful methods

			thingy.hide = function() { this.style.display = 'none'; };

			thingy.show = function() { this.style.display = ''; };

			thingy.addClass = function(name) { this.removeClass(name); this.className += ' ' + name; };

			thingy.removeClass = function(name) {

				var classes = this.className.split(/\s+/);

				var idx = -1;

				for (var k = 0; k < classes.length; k++) {

					if (classes[k] == name) { idx = k; k = classes.length; }

				}

				if (idx > -1) {

					classes.splice( idx, 1 );

					this.className = classes.join(' ');

				}

				return this;

			};

			thingy.hasClass = function(name) {

				return !!this.className.match( new RegExp("\\s*" + name + "\\s*") );

			};

		}

		return thingy;

	},

	setMoviePath: function(path) {

		// set path to ZeroClipboard.swf

		this.moviePath = path;

	},

	dispatch: function(id, eventName, args) {

		// receive event from flash movie, send to client		

		var client = this.clients[id];

		if (client) {

			client.receiveEvent(eventName, args);

		}

	},

	register: function(id, client) {

		// register new client to receive events

		this.clients[id] = client;

	},

	getDOMObjectPosition: function(obj, stopObj) {

		// get absolute coordinates for dom element

		var info = {

			left: 0, 

			top: 0, 

			width: obj.width ? obj.width : obj.offsetWidth, 

			height: obj.height ? obj.height : obj.offsetHeight

		};

		while (obj && (obj != stopObj)) {

			info.left += obj.offsetLeft;

			info.top += obj.offsetTop;

			obj = obj.offsetParent;

		}

		return info;

	},

	Client: function(elem) {

		// constructor for new simple upload client

		this.handlers = {};

		// unique ID

		this.id = ZeroClipboard.nextId++;

		this.movieId = 'ZeroClipboardMovie_' + this.id;

		// register client with singleton to receive flash events

		ZeroClipboard.register(this.id, this);

		// create movie

		if (elem) this.glue(elem);

	}

};

ZeroClipboard.Client.prototype = {

	id: 0, // unique ID for us

	ready: false, // whether movie is ready to receive events or not

	movie: null, // reference to movie object

	clipText: '', // text to copy to clipboard

	handCursorEnabled: true, // whether to show hand cursor, or default pointer cursor

	cssEffects: true, // enable CSS mouse effects on dom container

	handlers: null, // user event handlers

	glue: function(elem, appendElem, stylesToAdd) {

		// glue to DOM element

		// elem can be ID or actual DOM element object

		this.domElement = ZeroClipboard.$(elem);

		// float just above object, or zIndex 99 if dom element isn't set

		var zIndex = 99;

		if (this.domElement.style.zIndex) {

			zIndex = parseInt(this.domElement.style.zIndex, 10) + 1;

		}

		if (typeof(appendElem) == 'string') {

			appendElem = ZeroClipboard.$(appendElem);

		}

		else if (typeof(appendElem) == 'undefined') {

			appendElem = document.getElementsByTagName('body')[0];

		}

		// find X/Y position of domElement

		var box = ZeroClipboard.getDOMObjectPosition(this.domElement, appendElem);

		// create floating DIV above element

		this.div = document.createElement('div');

		var style = this.div.style;

		style.position = 'absolute';

		style.left = '' + box.left + 'px';

		style.top = '' + box.top + 'px';

		style.width = '' + box.width + 'px';

		style.height = '' + box.height + 'px';

		style.zIndex = zIndex;

		if (typeof(stylesToAdd) == 'object') {

			for (addedStyle in stylesToAdd) {

				style[addedStyle] = stylesToAdd[addedStyle];

			}

		}

		// style.backgroundColor = '#f00'; // debug

		appendElem.appendChild(this.div);

		this.div.innerHTML = this.getHTML( box.width, box.height );

	},

	getHTML: function(width, height) {

		// return HTML for movie

		var html = '';

		var flashvars = 'id=' + this.id + 

			'&width=' + width + 

			'&height=' + height;

		if (navigator.userAgent.match(/MSIE/)) {

			// IE gets an OBJECT tag

			var protocol = location.href.match(/^https/i) ? 'https://' : 'http://';

			html += '<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="'+protocol+'download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0" width="'+width+'" height="'+height+'" id="'+this.movieId+'" align="middle"><param name="allowScriptAccess" value="always" /><param name="allowFullScreen" value="false" /><param name="movie" value="'+ZeroClipboard.moviePath+'" /><param name="loop" value="false" /><param name="menu" value="false" /><param name="quality" value="best" /><param name="bgcolor" value="#ffffff" /><param name="flashvars" value="'+flashvars+'"/><param name="wmode" value="transparent"/></object>';

		}

		else {

			// all other browsers get an EMBED tag

			html += '<embed id="'+this.movieId+'" src="'+ZeroClipboard.moviePath+'" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="'+width+'" height="'+height+'" name="'+this.movieId+'" align="middle" allowScriptAccess="always" allowFullScreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="'+flashvars+'" wmode="transparent" />';

		}

		return html;

	},

	hide: function() {

		// temporarily hide floater offscreen

		if (this.div) {

			this.div.style.left = '-2000px';

		}

	},

	show: function() {

		// show ourselves after a call to hide()

		this.reposition();

	},

	destroy: function() {

		// destroy control and floater

		if (this.domElement && this.div) {

			this.hide();

			this.div.innerHTML = '';

			var body = document.getElementsByTagName('body')[0];

			try { body.removeChild( this.div ); } catch(e) {;}

			this.domElement = null;

			this.div = null;

		}

	},

	reposition: function(elem) {

		// reposition our floating div, optionally to new container

		// warning: container CANNOT change size, only position

		if (elem) {

			this.domElement = ZeroClipboard.$(elem);

			if (!this.domElement) this.hide();

		}

		if (this.domElement && this.div) {

			var box = ZeroClipboard.getDOMObjectPosition(this.domElement);

			var style = this.div.style;

			style.left = '' + box.left + 'px';

			style.top = '' + box.top + 'px';

		}

	},

	setText: function(newText) {

		// set text to be copied to clipboard

		this.clipText = newText;

		if (this.ready) this.movie.setText(newText);

	},

	addEventListener: function(eventName, func) {

		// add user event listener for event

		// event types: load, queueStart, fileStart, fileComplete, queueComplete, progress, error, cancel

		eventName = eventName.toString().toLowerCase().replace(/^on/, '');

		if (!this.handlers[eventName]) this.handlers[eventName] = [];

		this.handlers[eventName].push(func);

	},

	setHandCursor: function(enabled) {

		// enable hand cursor (true), or default arrow cursor (false)

		this.handCursorEnabled = enabled;

		if (this.ready) this.movie.setHandCursor(enabled);

	},

	setCSSEffects: function(enabled) {

		// enable or disable CSS effects on DOM container

		this.cssEffects = !!enabled;

	},

	receiveEvent: function(eventName, args) {

		// receive event from flash

		eventName = eventName.toString().toLowerCase().replace(/^on/, '');

		// special behavior for certain events

		switch (eventName) {

			case 'load':

				// movie claims it is ready, but in IE this isn't always the case...

				// bug fix: Cannot extend EMBED DOM elements in Firefox, must use traditional function

				this.movie = document.getElementById(this.movieId);

				if (!this.movie) {

					var self = this;

					setTimeout( function() { self.receiveEvent('load', null); }, 1 );

					return;

				}

				// firefox on pc needs a "kick" in order to set these in certain cases

				if (!this.ready && navigator.userAgent.match(/Firefox/) && navigator.userAgent.match(/Windows/)) {

					var self = this;

					setTimeout( function() { self.receiveEvent('load', null); }, 100 );

					this.ready = true;

					return;

				}

				this.ready = true;

				this.movie.setText( this.clipText );

				this.movie.setHandCursor( this.handCursorEnabled );

				break;

			case 'mouseover':

				if (this.domElement && this.cssEffects) {

					this.domElement.addClass('hover');

					if (this.recoverActive) this.domElement.addClass('active');

				}

				break;

			case 'mouseout':

				if (this.domElement && this.cssEffects) {

					this.recoverActive = false;

					if (this.domElement.hasClass('active')) {

						this.domElement.removeClass('active');

						this.recoverActive = true;

					}

					this.domElement.removeClass('hover');

				}

				break;

			case 'mousedown':

				if (this.domElement && this.cssEffects) {

					this.domElement.addClass('active');

				}

				break;

			case 'mouseup':

				if (this.domElement && this.cssEffects) {

					this.domElement.removeClass('active');

					this.recoverActive = false;

				}

				break;

		} // switch eventName

		if (this.handlers[eventName]) {

			for (var idx = 0, len = this.handlers[eventName].length; idx < len; idx++) {

				var func = this.handlers[eventName][idx];

				if (typeof(func) == 'function') {

					// actual function reference

					func(this, args);

				}

				else if ((typeof(func) == 'object') && (func.length == 2)) {

					// PHP style object + method, i.e. [myObject, 'myMethod']

					func[0][ func[1] ](this, args);

				}

				else if (typeof(func) == 'string') {

					// name of function

					window[func](this, args);

				}

			} // foreach event handler defined

		} // user defined handler for event

	}

};