/*
 * Ext JS Library 2.0 Copyright(c) 2006-2007, Ext JS, LLC. licensing@extjs.com
 * 
 * http://extjs.com/license
 */

if (typeof YAHOO == "undefined") {
	throw "Unable to load Ext, core YUI utilities (yahoo, dom, event) not found.";
}

(function() {
	var E = YAHOO.util.Event;
	var D = YAHOO.util.Dom;
	var CN = YAHOO.util.Connect;

	var ES = YAHOO.util.Easing;
	var A = YAHOO.util.Anim;
	var libFlyweight;

	Ext.lib.Dom = {
		getViewWidth : function(full) {
			return full ? D.getDocumentWidth() : D.getViewportWidth();
		},

		getViewHeight : function(full) {
			return full ? D.getDocumentHeight() : D.getViewportHeight();
		},

		isAncestor : function(haystack, needle) {
			return D.isAncestor(haystack, needle);
		},

		getRegion : function(el) {
			return D.getRegion(el);
		},

		getY : function(el) {
			return this.getXY(el)[1];
		},

		getX : function(el) {
			return this.getXY(el)[0];
		},

		// original version based on YahooUI getXY
		// this version fixes several issues in Safari and FF
		// and boosts performance by removing the batch overhead, repetitive dom
		// lookups and array index calls
		getXY : function(el) {
			var p, pe, b, scroll, bd = (document.body || document.documentElement);
			el = Ext.getDom(el);

			if (el == bd) {
				return [0, 0];
			}

			if (el.getBoundingClientRect) {
				b = el.getBoundingClientRect();
				scroll = fly(document).getScroll();
				return [b.left + scroll.left, b.top + scroll.top];
			}
			var x = 0, y = 0;

			p = el;

			var hasAbsolute = fly(el).getStyle("position") == "absolute";

			while (p) {

				x += p.offsetLeft;
				y += p.offsetTop;

				if (!hasAbsolute && fly(p).getStyle("position") == "absolute") {
					hasAbsolute = true;
				}

				if (Ext.isGecko) {
					pe = fly(p);

					var bt = parseInt(pe.getStyle("borderTopWidth"), 10) || 0;
					var bl = parseInt(pe.getStyle("borderLeftWidth"), 10) || 0;

					x += bl;
					y += bt;

					if (p != el && pe.getStyle('overflow') != 'visible') {
						x += bl;
						y += bt;
					}
				}
				p = p.offsetParent;
			}

			if (Ext.isSafari && hasAbsolute) {
				x -= bd.offsetLeft;
				y -= bd.offsetTop;
			}

			if (Ext.isGecko && !hasAbsolute) {
				var dbd = fly(bd);
				x += parseInt(dbd.getStyle("borderLeftWidth"), 10) || 0;
				y += parseInt(dbd.getStyle("borderTopWidth"), 10) || 0;
			}

			p = el.parentNode;
			while (p && p != bd) {
				if (!Ext.isOpera
						|| (p.tagName != 'TR' && fly(p).getStyle("display") != "inline")) {
					x -= p.scrollLeft;
					y -= p.scrollTop;
				}
				p = p.parentNode;
			}
			return [x, y];
		},

		setXY : function(el, xy) {
			el = Ext.fly(el, '_setXY');
			el.position();
			var pts = el.translatePoints(xy);
			if (xy[0] !== false) {
				el.dom.style.left = pts.left + "px";
			}
			if (xy[1] !== false) {
				el.dom.style.top = pts.top + "px";
			}
		},

		setX : function(el, x) {
			this.setXY(el, [x, false]);
		},

		setY : function(el, y) {
			this.setXY(el, [false, y]);
		}
	};

	Ext.lib.Event = {
		getPageX : function(e) {
			return E.getPageX(e.browserEvent || e);
		},

		getPageY : function(e) {
			return E.getPageY(e.browserEvent || e);
		},

		getXY : function(e) {
			return E.getXY(e.browserEvent || e);
		},

		getTarget : function(e) {
			return E.getTarget(e.browserEvent || e);
		},

		getRelatedTarget : function(e) {
			return E.getRelatedTarget(e.browserEvent || e);
		},

		on : function(el, eventName, fn, scope, override) {
			E.on(el, eventName, fn, scope, override);
		},

		un : function(el, eventName, fn) {
			E.removeListener(el, eventName, fn);
		},

		purgeElement : function(el) {
			E.purgeElement(el);
		},

		preventDefault : function(e) {
			E.preventDefault(e.browserEvent || e);
		},

		stopPropagation : function(e) {
			E.stopPropagation(e.browserEvent || e);
		},

		stopEvent : function(e) {
			E.stopEvent(e.browserEvent || e);
		},

		onAvailable : function(el, fn, scope, override) {
			return E.onAvailable(el, fn, scope, override);
		}
	};

	Ext.lib.Ajax = {
		request : function(method, uri, cb, data, options) {
			if (options) {
				var hs = options.headers;
				if (hs) {
					for (var h in hs) {
						if (hs.hasOwnProperty(h)) {
							CN.initHeader(h, hs[h], false);
						}
					}
				}
				if (options.xmlData) {
					CN.initHeader('Content-Type', 'text/xml', false);
					method = 'POST';
					data = options.xmlData;
				} else if (options.jsonData) {
					CN.initHeader('Content-Type', 'text/javascript', false);
					method = 'POST';
					data = typeof options.jsonData == 'object' ? Ext
							.encode(options.jsonData) : options.jsonData;
				}
			}
			return CN.asyncRequest(method, uri, cb, data);
		},

		formRequest : function(form, uri, cb, data, isUpload, sslUri) {
			CN.setForm(form, isUpload, sslUri);
			return CN.asyncRequest(Ext.getDom(form).method || 'POST', uri, cb,
					data);
		},

		isCallInProgress : function(trans) {
			return CN.isCallInProgress(trans);
		},

		abort : function(trans) {
			return CN.abort(trans);
		},

		serializeForm : function(form) {
			var d = CN.setForm(form.dom || form);
			CN.resetFormState();
			return d;
		}
	};

	Ext.lib.Region = YAHOO.util.Region;
	Ext.lib.Point = YAHOO.util.Point;

	Ext.lib.Anim = {
		scroll : function(el, args, duration, easing, cb, scope) {
			this.run(el, args, duration, easing, cb, scope, YAHOO.util.Scroll);
		},

		motion : function(el, args, duration, easing, cb, scope) {
			this.run(el, args, duration, easing, cb, scope, YAHOO.util.Motion);
		},

		color : function(el, args, duration, easing, cb, scope) {
			this.run(el, args, duration, easing, cb, scope,
					YAHOO.util.ColorAnim);
		},

		run : function(el, args, duration, easing, cb, scope, type) {
			type = type || YAHOO.util.Anim;
			if (typeof easing == "string") {
				easing = YAHOO.util.Easing[easing];
			}
			var anim = new type(el, args, duration, easing);
			anim.animateX(function() {
						Ext.callback(cb, scope);
					});
			return anim;
		}
	};

	// all lib flyweight calls use their own flyweight to prevent collisions
	// with developer flyweights
	function fly(el) {
		if (!libFlyweight) {
			libFlyweight = new Ext.Element.Flyweight();
		}
		libFlyweight.dom = el;
		return libFlyweight;
	}

	// prevent IE leaks
	if (Ext.isIE) {
		function fnCleanUp() {
			var p = Function.prototype;
			delete p.createSequence;
			delete p.defer;
			delete p.createDelegate;
			delete p.createCallback;
			delete p.createInterceptor;

			window.detachEvent("onunload", fnCleanUp);
		}
		window.attachEvent("onunload", fnCleanUp);
	}
	// various overrides

	// add ability for callbacks with animations
	if (YAHOO.util.Anim) {
		YAHOO.util.Anim.prototype.animateX = function(callback, scope) {
			var f = function() {
				this.onComplete.unsubscribe(f);
				if (typeof callback == "function") {
					callback.call(scope || this, this);
				}
			};
			this.onComplete.subscribe(f, this, true);
			this.animate();
		};
	}

	if (YAHOO.util.DragDrop && Ext.dd.DragDrop) {
		YAHOO.util.DragDrop.defaultPadding = Ext.dd.DragDrop.defaultPadding;
		YAHOO.util.DragDrop.constrainTo = Ext.dd.DragDrop.constrainTo;
	}

	YAHOO.util.Dom.getXY = function(el) {
		var f = function(el) {
			return Ext.lib.Dom.getXY(el);
		};
		return YAHOO.util.Dom.batch(el, f, YAHOO.util.Dom, true);
	};

	// workaround for Safari anim duration speed problems
	if (YAHOO.util.AnimMgr) {
		YAHOO.util.AnimMgr.fps = 1000;
	}

	YAHOO.util.Region.prototype.adjust = function(t, l, b, r) {
		this.top += t;
		this.left += l;
		this.right += r;
		this.bottom += b;
		return this;
	};

	YAHOO.util.Region.prototype.constrainTo = function(r) {
		this.top = this.top.constrain(r.top, r.bottom);
		this.bottom = this.bottom.constrain(r.top, r.bottom);
		this.left = this.left.constrain(r.left, r.right);
		this.right = this.right.constrain(r.left, r.right);
		return this;
	};

})();