/* cbe_event.js $Revision: 0.15 $
 * CBE v4.19, Cross-Browser DHTML API from Cross-Browser.com
 * Copyright (c) 2002 Michael Foster (mike@cross-browser.com)
 * Distributed under the terms of the GNU LGPL from gnu.org
*/

function cbeELReg(eventType, eventListener, eventCapture, listenerObject) { // event listener registration object constructor
	this.type = eventType; this.listener = eventListener; this.capture = eventCapture; this.obj = listenerObject;
}

function CrossBrowserEvent(e) { // Object constructor

	// from DOM2 Interface Event
	this.type = "";
	this.target = null;
	this.currentTarget = null;
	this.eventPhase = 0;
	this.bubbles = true;
	this.cancelable = true;
	this.timeStamp = 0;
	this.AT_TARGET = 1;
	this.BUBBLING_PHASE = 2;
	this.CAPTURING_PHASE = 3; // eventPhase masks

	// from DOM2 Interface MouseEvent : UIEvent
	this.screenX = 0;
	this.screenY = 0;
	this.clientX = 0;
	this.clientY = 0;
	this.ctrlKey = false;
	this.shiftKey = false;
	this.altKey = false;
	this.metaKey = false;
	this.button = 3; // 3 == undefined
	this.relatedTarget = null;
	this.LEFT = 0; this.MIDDLE = 1; this.RIGHT = 2; // button masks

	// from IE4 Object Model
	this.keyCode = 0;
	this.offsetX = 0;
	this.offsetY = 0;

	// from NN4 Object Model
	this.pageX = 0;
	this.pageY = 0;

	// CBE
	this.stopPropagationFlag = false;
	this.preventDefaultFlag = false;
	this.cbeTarget = window.cbe;
	this.cbeCurrentTarget = window.cbe;

	if (!e) return;
  	if (e.type) { this.type = e.type; }

	if (e.target) { this.target = e.target; }
	else if (e.srcElement) { this.target = e.srcElement; }

	if (e.currentTarget) { this.currentTarget = e.currentTarget; }
	else if (e.toElement) { this.currentTarget = e.toElement; }

	if (e.eventPhase) { this.eventPhase = e.eventPhase; }
	if (e.bubbles) { this.bubbles = e.bubbles; }
	if (e.cancelable) { this.cancelable = e.cancelable; }
	if (e.timeStamp) { this.timeStamp = e.timeStamp; }
	if (e.screenX) { this.screenX = e.screenX; }
	if (e.screenY) { this.screenY = e.screenY; }

	if (is.opera5or6) { this.clientX = e.clientX - document.cbe.scrollLeft(); }
	else if (e.clientX) { this.clientX = e.clientX; }
	else if (e.pageX) { this.clientX = e.pageX - document.cbe.scrollLeft(); }

	if (is.opera5or6) { this.clientY = e.clientY - document.cbe.scrollLeft(); }
	else if (e.clientY) { this.clientY = e.clientY; }
	else if (e.pageY) { this.clientY = e.pageY - document.cbe.scrollLeft(); }

	if (is.opera5or6) { this.ctrlKey = e.type=='mousemove' ? e.shiftKey : e.ctrlKey; }
	else if (_def(e.ctrlKey)) { this.ctrlKey = e.ctrlKey; }
	else if (_def(e.modifiers) && window.Event) { this.ctrlKey = (e.modifiers & window.Event.CONTROL_MASK) != 0; }

	if (is.opera5or6) { this.shiftKey = e.type=='mousemove' ? e.ctrlKey : e.shiftKey; }
	else if (_def(e.shiftKey)) { this.shiftKey = e.shiftKey; }
	else if (_def(e.modifiers) && window.Event) { this.shiftKey = (e.modifiers & Event.SHIFT_MASK) != 0; }

	if (e.altKey) { this.altKey = e.altKey; }
	else if (_def(e.modifiers) && window.Event) { this.altKey = (e.modifiers & Event.ALT_MASK) != 0; }

	if (e.metaKey) { this.metaKey = e.metaKey; }

	// button (?)
	if (is.ie) { 
		if (this.type.indexOf('mouse') != -1) {
		      if (e.button == 1) this.button = this.LEFT;
		      else if (e.button == 4) this.button = this.MIDDLE;
			else if (e.button == 2) this.button = this.RIGHT;
		}
		else if (this.type == 'click') this.button = this.LEFT;
		else this.button = 4; // non-mouse event
	}
	else if (_def(e.button)) { // standard
		if (this.type.indexOf('mouse') != -1) { this.button = e.button; if (this.button < 0 || this.button > 2) {this.button = 3;} }
		else if (this.type == 'click') this.button = this.LEFT;
		else this.button = 4; // non-mouse event
	}  
	else if (_def(e.which)) {
		if (document.layers) { // nn4
			if (this.type.indexOf('mouse') != -1) { this.button = e.which - 1; if (this.button < 0 || this.button > 2) {this.button = 3;} }
			else if (this.type == 'click') this.button = this.LEFT;
			else this.button = 4; // non-mouse event
		}
		else { // opera5or6
			if ((e.type == 'click' && e.which == 0) || ((e.type == 'mousedown' || e.type == 'mouseup') && e.which == 1)) {this.button = this.LEFT;}
		}
	}

	if (e.relatedTarget) { this.relatedTarget = e.relatedTarget; }
	else if (e.fromElement) { this.relatedTarget = e.fromElement; } // ? may need to be toElement in some cases ?

	if (_def(e.which)) { this.keyCode = e.which; }
	else if (_def(e.keyCode)) { this.keyCode = e.keyCode; }

	var calcOfs = false;
	if (_def(e.layerX,e.layerY)) { this.offsetX = e.layerX; this.offsetY = e.layerY; }
	else calcOfs = true; // calculate it below

	if (is.opera5or6) { this.pageX = e.clientX; this.pageY = e.clientY; }
	else if (_def(e.pageX,e.pageY)) { this.pageX = e.pageX; this.pageY = e.pageY; }
	else {
		this.pageX = this.clientX + document.cbe.scrollLeft();
		this.pageY = this.clientY + document.cbe.scrollTop();
	}
  
	// Find the CBE event target
	if (document.layers) {
		this.cbeTarget = cbeGetNodeFromPoint(this.pageX, this.pageY);

		// NN4 note: mouseout works only if mouseover and mouseout are both added to the same object
		if (this.type == 'mouseover') cbeMOT = this.cbeTarget;
		else if (this.type == 'mouseout') this.cbeTarget = cbeMOT || document.cbe;
	}
	else { var target = this.target; while (!target.cbe) {target = cbeGetParentElement(target);} this.cbeTarget = target.cbe; }
	this.cbeCurrentTarget = this.cbeTarget;
	if (calcOfs) { this.offsetX = this.pageX - this.cbeTarget.pageX(); this.offsetY = this.pageY - this.cbeTarget.pageY(); }
}

CrossBrowserElement.prototype.addEventListener = function(eventType, eventListener, useCapture, listenerObject) {
	if (!useCapture) useCapture = false;
	eventType = eventType.toLowerCase();
	if ((eventType.indexOf('mouse') != -1)
		|| eventType == 'click'
		|| (eventType.indexOf('key') != -1)
/*		|| (eventType.indexOf('resize') != -1 && !is.nav4 && !is.opera)
		|| (eventType.indexOf('scroll') != -1 && !is.nav && !is.opera) */
	) {
		var add=true;
		for (var i=0; i < this.listeners.length; ++i) { if (eventType == this.listeners[i].type) {add=false; break;} }
		if (add) {
			cbeNativeAddEventListener(this.ele, eventType, cbePropagateEvent, false);
		}
		this.listeners[this.listeners.length] = new cbeELReg(eventType, eventListener, useCapture, listenerObject);
		return;
	}

	switch(eventType) {
		case 'slidestart': this.onslidestart = eventListener; return;
		case 'slide': this.onslide = eventListener; return;
		case 'slideend': this.onslideend = eventListener; return;
		case 'dragstart': this.ondragstart = eventListener; return;
		case 'drag':
			this.ondragCapture = useCapture;
			this.ondrag = eventListener;
			this.addEventListener('mousedown', cbeDragStartEvent, useCapture);
			return;
		case 'dragend': this.ondragend = eventListener; return;
		case 'dragresize': if (window.cbeUtilJsLoaded) cbeAddDragResizeListener(this); return;
		case 'scroll':
			if (is.nav || is.opera) {
				window.cbeOldScrollTop = cbePageYOffset();
				window.cbeOnScrollListener = eventListener;
				cbeScrollEvent();
				return;
			}
		      break;
		case 'resize':
			if (is.nav4 || is.opera) {
				window.cbeOldWidth = cbeInnerWidth();
				window.cbeOldHeight = cbeInnerHeight();
				window.cbeOnResizeListener = eventListener;
				cbeResizeEvent();
				return;
			}
			break;
	} // end switch

	cbeNativeAddEventListener(this.ele, eventType, eventListener, useCapture);
}

function cbeNativeAddEventListener(ele, eventType, eventListener, useCapture) {
	if (!useCapture) useCapture = false;
	eventType = eventType.toLowerCase();
	var eh = "ele.on" + eventType + "=eventListener";
	if (ele.addEventListener) {
		ele.addEventListener(eventType, eventListener, useCapture);
	}
	else if (ele.captureEvents) {
//		if (useCapture || (eventType.indexOf('mousemove')!=-1))  // ???
		ele.captureEvents(eval("Event." + eventType.toUpperCase()));
		eval(eh);
	}
	else { eval(eh); }
}

function cbeNativeRemoveEventListener(ele, eventType, eventListener, useCapture) {
	if (!useCapture) useCapture = false;
	eventType = eventType.toLowerCase();
	var eh = "ele.on" + eventType + "=null";
	if (ele.removeEventListener) {
		ele.removeEventListener(eventType, eventListener, useCapture);
	}
	else if (ele.releaseEvents) {
//		if (useCapture || (eventType.indexOf('mousemove')!=-1))  // ???
		ele.releaseEvents(eval("Event." + eventType.toUpperCase()));
		eval(eh);
	}
	else { eval(eh); }
}

CrossBrowserElement.prototype.removeEventListener = function(eventType, eventListener, useCapture) {
	eventType = eventType.toLowerCase();
	if (!useCapture) useCapture = false;
	if ((eventType.indexOf('mouse') != -1) || eventType == 'click' || (eventType.indexOf('key') != -1)) {
		var i;
		for (i = 0; i < this.listeners.length; ++i) {
			if (this.listeners[i].type == eventType && this.listeners[i].listener == eventListener && this.listeners[i].capture == useCapture) {
				if (this.listeners.splice) this.listeners.splice(i, 1);
				else this.listeners[i].type = "*";
				break;
			}
		}
		var remove=true;
		for (i = 0; i < this.listeners.length; ++i) { if (eventType == this.listeners[i].type) { remove = false; break; } }
		if (remove) cbeNativeRemoveEventListener(this.ele, eventType, cbePropagateEvent, false);
		return;
	}

	switch(eventType) {
		case 'slidestart': this.onslidestart = null; return;
		case 'slide': this.onslide = null; return;
		case 'slideend': this.onslideend = null; return;
		case 'dragstart': this.ondragstart = null; return;
		case 'drag':
			this.removeEventListener('mousedown', cbeDragStartEvent, this.ondragCapture);
			this.ondrag = null;
			return;
		case 'dragend': this.ondragend = null; return;
		case 'dragresize': if (window.cbeUtilJsLoaded) cbeRemoveDragResizeListener(this); return;
		case 'scroll':
			if (is.nav || is.opera) {
				window.cbeOnScrollListener = null;
				return;
			}
			break;
		case 'resize':
			if (is.nav4 || is.opera) {
				window.cbeOnResizeListener = null;
				return;
			}
			break;
	} // end switch

	cbeNativeRemoveEventListener(this.ele, eventType, eventListener, useCapture);
}

CrossBrowserEvent.prototype.stopPropagation = function() { this.stopPropagationFlag = true; }

CrossBrowserEvent.prototype.preventDefault = function() { this.preventDefaultFlag = true; }

CrossBrowserElement.prototype.dispatchEvent= function(e) {
	var dispatch;
	e.cbeCurrentTarget = this;
	for (var i=0; i < this.listeners.length; ++i) {
		dispatch = false;
		if (e.type == this.listeners[i].type) {
			if (e.eventPhase == e.CAPTURING_PHASE) {
				if (this.listeners[i].capture) dispatch = true;
			}
			else if (!this.listeners[i].capture) dispatch = true;
		}
		if (dispatch) {
			if (this.listeners[i].obj) cbeEval(this.listeners[i].obj, this.listeners[i].listener, e);
			else cbeEval(this.listeners[i].listener, e);
		}
	}
}

function cbePropagateEvent(evt) {
	var i=0, e=null, a=new Array();
	if (evt) e = new CrossBrowserEvent(evt);
	else if (window.event) e = new CrossBrowserEvent(window.event);
	else return;

	// Create an array of EventTargets, following the parent chain up (does not include cbeTarget)
	var node = e.cbeTarget.parentNode;
	while(node) {
		a[i++] = node;
		node = node.parentNode;
	}

	// The capturing phase
	e.eventPhase = e.CAPTURING_PHASE;
	for (i = a.length-1; i>=0; --i) {
		a[i].dispatchEvent(e);
		if (e.stopPropagationFlag) break;
	}

	// The at-target phase
	if (!e.stopPropagationFlag) {
		e.eventPhase = e.AT_TARGET;
		e.cbeTarget.dispatchEvent(e);

		// The bubbling phase
		if (!e.stopPropagationFlag && e.bubbles) {
			e.eventPhase = e.BUBBLING_PHASE;
			for (i = 0; i < a.length; ++i) {
				a[i].dispatchEvent(e);
				if (e.stopPropagationFlag) break;
			}
		}
	}

	//  Don't allow native bubbling
	if (is.ie) window.event.cancelBubble = true;
	else if (is.gecko) evt.stopPropagation();

	// Allow listener to cancel default action
	if (e.cancelable && e.preventDefaultFlag) {
		if (is.gecko || is.opera) evt.preventDefault();
		return false;
	}
	else return true;
}

function cbeGetNodeFromPoint(x, y) {
	var hn /* highNode */, hz=0 /* highZ */, cn /* currentNode */, cz /* currentZ */;
	hn = document.cbe;
	while (hn.firstChild && hz >= 0) {
		hz = -1;
		cn = hn.firstChild;
		while (cn) {
			if (cn.contains(x, y)) {
				cz = cn.zIndex();
				if (cz >= hz) {
					hn = cn;
					hz = cz;
				}
			}
			cn = cn.nextSibling;
		}
	}
	return hn;
}

function cbeScrollEvent() {
	if (!window.cbeOnScrollListener) { return; }
	if (cbePageYOffset() != window.cbeOldScrollTop) {
		cbeEval(window.cbeOnScrollListener);
		window.cbeOldScrollTop = cbePageYOffset();
	}
	setTimeout("cbeScrollEvent()", 250);
}

function cbeResizeEvent() {
	if (!window.cbeOnResizeListener) { return; }
	var dw = window.cbeOldWidth - cbeInnerWidth();
	var dh = window.cbeOldHeight - cbeInnerHeight();
	if (dw != 0 || dh != 0) {
		if (window.cbeOnResizeListener) cbeEval(window.cbeOnResizeListener, dw, dh);
		window.cbeOldWidth = cbeInnerWidth();
		window.cbeOldHeight = cbeInnerHeight();
	}
	setTimeout("cbeResizeEvent()", 250);
}

function cbeDefaultResizeListener() {
	if (is.opera) location.replace(location.href);
	else history.go(0);
}

var cbeDragObj, cbeDragTarget, cbeDragPhase;

function cbeDragStartEvent(e) {
	if (is.opera) { var tn = e.target.tagName.toLowerCase(); if (tn == 'a') return; }
	else if (is.nav4) { if (e.target.href) return; }

	cbeDragObj = e.cbeCurrentTarget;
	cbeDragTarget = e.cbeTarget;

	if (cbeDragTarget.id == cbeDragObj.id) cbeDragPhase = e.AT_TARGET;
	else if (cbeDragObj.ondragCapture) cbeDragPhase = e.CAPTURING_PHASE;
	else cbeDragPhase = e.BUBBLING_PHASE;

	if (cbeDragObj) {
		if (cbeDragObj.ondragstart) { e.type = 'dragstart'; cbeEval(cbeDragObj.ondragstart, e); e.type = 'mousedown'; }
		cbeDragObj.x = e.pageX;
		cbeDragObj.y = e.pageY;
		document.cbe.addEventListener('mousemove', cbeDragEvent, cbeDragObj.ondragCapture);
		document.cbe.addEventListener('mouseup', cbeDragEndEvent, false);
	}
	e.stopPropagation();
	e.preventDefault();
}

function cbeDragEndEvent(e) {
	document.cbe.removeEventListener('mousemove', cbeDragEvent, cbeDragObj.ondragCapture);
	document.cbe.removeEventListener('mouseup', cbeDragEndEvent, false);
	if (cbeDragObj.ondragend) {
		e.type = 'dragend';
		e.cbeCurrentTarget = cbeDragObj;
		e.cbeTarget = cbeDragTarget;
		cbeEval(cbeDragObj.ondragend, e);
		e.type = 'mouseup';
	}

	//e.stopPropagation();
	e.preventDefault();
}

function cbeDragEvent(e) {
	if (cbeDragObj) {
		e.dx = e.pageX - cbeDragObj.x;
		e.dy = e.pageY - cbeDragObj.y;
		cbeDragObj.x = e.pageX;
		cbeDragObj.y = e.pageY;
		e.type = 'drag';
		e.cbeTarget = cbeDragTarget;
		e.cbeCurrentTarget = cbeDragObj;
		e.eventPhase = cbeDragPhase;

		if (cbeDragObj.ondrag) cbeEval(cbeDragObj.ondrag, e);
		else cbeDragObj.moveBy(e.dx,e.dy);
		e.type = 'mousemove';
	}

	//e.stopPropagation();
	e.preventDefault();
}

var cbeEventPhase = new Array('', 'AT_TARGET', 'BUBBLING_PHASE', 'CAPTURING_PHASE');
var cbeButton = new Array('LEFT', 'MIDDLE', 'RIGHT', 'undefined', 'non-mouse event');
CrossBrowserElement.prototype.ondragstart = null;
CrossBrowserElement.prototype.ondrag = null;
CrossBrowserElement.prototype.ondragend = null;
var cbeEventJsLoaded = true;
// End cbe_event.js