/* http://keith-wood.name/svg.html
   SVG/jQuery DOM compatibility for jQuery v1.4.2.
   Written by Keith Wood (kbwood{at}iinet.com.au) April 2009.
   Dual licensed under the GPL (http://dev.jquery.com/browser/trunk/jquery/GPL-LICENSE.txt) and 
   MIT (http://dev.jquery.com/browser/trunk/jquery/MIT-LICENSE.txt) licenses. 
   Please attribute the author if you use it. */

(function($) { // Hide scope, no $ conflict

/* Support adding class names to SVG nodes. */
var origAddClass = $.fn.addClass;

$.fn.addClass = function(classNames) {
	classNames = classNames || '';
	return this.each(function() {
		if (isSVGElem(this)) {
			var node = this;
			$.each(classNames.split(/\s+/), function(i, className) {
				var classes = (node.className ? node.className.baseVal : node.getAttribute('class'));
				if ($.inArray(className, classes.split(/\s+/)) == -1) {
					classes += (classes ? ' ' : '') + className;
					(node.className ? node.className.baseVal = classes :
						node.setAttribute('class',  classes));
				}
			});
		}
		else {
			origAddClass.apply($(this), [classNames]);
		}
	});
};

/* Support removing class names from SVG nodes. */
var origRemoveClass = $.fn.removeClass;

$.fn.removeClass = function(classNames) {
	classNames = classNames || '';
	return this.each(function() {
		if (isSVGElem(this)) {
			var node = this;
			$.each(classNames.split(/\s+/), function(i, className) {
				var classes = (node.className ? node.className.baseVal : node.getAttribute('class'));
				classes = $.grep(classes.split(/\s+/), function(n, i) { return n != className; }).
					join(' ');
				(node.className ? node.className.baseVal = classes :
					node.setAttribute('class', classes));
			});
		}
		else {
			origRemoveClass.apply($(this), [classNames]);
		}
	});
};

/* Support toggling class names on SVG nodes. */
var origToggleClass = $.fn.toggleClass;

$.fn.toggleClass = function(className, state) {
	return this.each(function() {
		if (isSVGElem(this)) {
			if (typeof state !== 'boolean') {
				state = !$(this).hasClass(className);
			}
			$(this)[(state ? 'add' : 'remove') + 'Class'](className);
		}
		else {
			origToggleClass.apply($(this), [className, state]);
		}
	});
};

/* Support checking class names on SVG nodes. */
var origHasClass = $.fn.hasClass;

$.fn.hasClass = function(className) {
	className = className || '';
	var found = false;
	this.each(function() {
		if (isSVGElem(this)) {
			var classes = (this.className ? this.className.baseVal :
				this.getAttribute('class')).split(/\s+/);
			found = ($.inArray(className, classes) > -1);
		}
		else {
			found = (origHasClass.apply($(this), [className]));
		}
		return !found;
	});
	return found;
};

/* Support attributes on SVG nodes. */
var origAttr = $.fn.attr;

//BWB: is this what i need to do for css?
$.fn.attr = function(name, value, type) {
	if (typeof name === 'string' && value === undefined) {
		var val = origAttr.apply(this, [name, value, type]);
		return (val && val.baseVal ? val.baseVal.valueAsString : val);
	}
	var options = name;
	if (typeof name === 'string') {
		options = {};
		options[name] = value;
	}
	return this.each(function() {
		if (isSVGElem(this)) {
			for (var n in options) {
				this.setAttribute(n,
					(typeof options[n] == 'function' ? options[n]() : options[n]));
			}
		}
		else {
			origAttr.apply($(this), [name, value, type]);
		}
	});
};

// BWB attempting to patch css manipulation of SVG
//support manipulation of css styles
var origCss = $.fn.css;

$.fn.css = function(name, value, type) {
    var revAttrName = function(name){
	for (var jsName in $.svg._attrNames){
	    if ($.svg._attrNames[jsName] === name){
		return jsName;
	    }
	}
	return name;
    };

	if (typeof name === 'string' && value === undefined) {
		var val = origCss.apply(this, [name, value, type]);
		return (val && val.baseVal ? val.baseVal.valueAsString : val);
	}
	var options = name;
	if (typeof name === 'string') {
		options = {};
		options[name] = value;
	}
	return this.each(function() {
	    if (isSVGElem(this)) {
		for (var n in options) {
		    //if Firefox
		    if (this.style.MozBinding === "") {
			var jsName = revAttrName(n);
			this.style[jsName] = options[n]; 
			    (typeof options[n] === 'function' ? options[n]() : options[n]);
		    } else {
			this.style.setProperty(n,
			    typeof options[n] == 'function' ? options[n]() : options[n]);
		    }
		}
	    }
	    else {
		origCss.apply($(this), [name, value, type]);
	    }
	});
};


/* Support removing attributes on SVG nodes. */
var origRemoveAttr = $.fn.removeAttr;

$.fn.removeAttr = function(name) {
	return this.each(function() {
		if (isSVGElem(this)) {
			(this[name] && this[name].baseVal ? this[name].baseVal.value = '' :
				this.setAttribute(name, ''));
		}
		else {
			origRemoveAttr.apply($(this), [name]);
		}
	});
};

/* Update Sizzle selectors. */
var origRelativeNext = $.expr.relative['+'];
var origRelativeChild = $.expr.relative['>'];
var origRelativeDescendant = $.expr.relative[''];
var origRelativeSiblings = $.expr.relative['~'];
var origFindId = $.expr.find.ID;
var origFindTag = $.expr.find.TAG;
var origPreFilterClass = $.expr.preFilter.CLASS;
var origFilterClass = $.expr.filter.CLASS;
var origFilterAttr = $.expr.filter.ATTR;

/* Determine if any nodes are SVG nodes. */
function anySVG(checkSet) {
	for (var i = 0; i < checkSet.length; i++) {
		if (checkSet[i].nodeType == 1 && checkSet[i].namespaceURI == $.svg.svgNS) {
			return true;
		}
	}
	return false;
}

$.expr.relative['+'] = function(checkSet, part, isXML) {
	origRelativeNext(checkSet, part, isXML || anySVG(checkSet));
};

$.expr.relative['>'] = function(checkSet, part, isXML) {
	origRelativeChild(checkSet, part, isXML || anySVG(checkSet));
};

$.expr.relative[''] = function(checkSet, part, isXML) {
	origRelativeDescendant(checkSet, part, isXML || anySVG(checkSet));
};

$.expr.relative['~'] = function(checkSet, part, isXML) {
	origRelativeSiblings(checkSet, part, isXML || anySVG(checkSet));
};

$.expr.find.ID = function(match, context, isXML) {
	return (isSVGElem(context) ?
		[context.ownerDocument.getElementById(match[1])] :
		origFindId(match, context, isXML));
};

var div = document.createElement('div');
div.appendChild(document.createComment(''));
if (div.getElementsByTagName('*').length > 0) { // Make sure no comments are found
	$.expr.find.TAG = function(match, context) {
		var results = context.getElementsByTagName(match[1]);
		if (match[1] === '*') { // Filter out possible comments
			var tmp = [];
			for (var i = 0; results[i] || results.item(i); i++) {
				if ((results[i] || results.item(i)).nodeType === 1) {
					tmp.push(results[i] || results.item(i));
				}
			}
			results = tmp;
		}
		return results;
	};
}

$.expr.preFilter.CLASS = function(match, curLoop, inplace, result, not, isXML) {
	match = ' ' + match[1].replace(/\\/g, '') + ' ';
	if (isXML) {
		return match;
	}
	for (var i = 0, elem = {}; elem != null; i++) {
		elem = curLoop[i];
		if (!elem) {
			try {
				elem = curLoop.item(i);
			}
			catch (e) {
				// Ignore
			}
		}
		if (elem) {
			var className = (!isSVGElem(elem) ? elem.className :
				(elem.className ? elem.className.baseVal : '') || elem.getAttribute('class'));
			if (not ^ (className && (' ' + className + ' ').indexOf(match) > -1)) {
				if (!inplace)
					result.push(elem);
			}
			else if (inplace) {
				curLoop[i] = false;
			}
		}
	}
	return false;
};

$.expr.filter.CLASS = function(elem, match) {
	var className = (!isSVGElem(elem) ? elem.className :
		(elem.className ? elem.className.baseVal : elem.getAttribute('class')));
	return (' ' + className + ' ').indexOf(match) > -1;
};

$.expr.filter.ATTR = function(elem, match) {
	var handler = null;
	if (isSVGElem(elem)) {
		handler = match[1];
		$.expr.attrHandle[handler] = function(elem){
			var attr = elem.getAttribute(handler);
			return attr && attr.baseVal || attr;
		};
	}
	var filter = origFilterAttr(elem, match);
	if (handler) {
		$.expr.attrHandle[handler] = null;
	}
	return filter;
};

/*
	Change Sizzle initialisation (line 1425) in jQuery v1.3.2 base code...
	
	if ( toString.call(checkSet) === "[object Array]" ) {
		if ( !prune ) {
			results.push.apply( results, checkSet );
		} else if ( context.nodeType === 1 ) {
			for ( var i = 0; checkSet[i] != null; i++ ) {
				if ( checkSet[i] && (checkSet[i] === true || checkSet[i].nodeType === 1 && contains(context, checkSet[i])) ) {
					results.push( set[i] || set.item(i) ); // Here
				}
			}
		} else {
			for ( var i = 0; checkSet[i] != null; i++ ) {
				if ( checkSet[i] && checkSet[i].nodeType === 1 ) {
					results.push( set[i] || set.item(i) ); // Here
				}
			}
		}
	}
	
	Change fallback makeArray (line 2076) implementation in jQuery Sizzle...
	
			if ( typeof array.length === "number" ) {
				for ( var i = 0, l = array.length; i < l; i++ ) {
					ret.push( array[i] || array.item(i) ); // Here
				}
			}
*/

/*
	Events management requires changes to jQuery v1.3.2 base code...

	In $.event.add (line 2437)...
	
				if ( !jQuery.event.special[type] || jQuery.event.special[type].setup.call(elem, data, namespaces) === false ) {
					// Bind the global event handler to the element
					try { // Here
						elem.addEventListener(type, handle, false);
					}
					catch(e) {
						if (elem.attachEvent)
							elem.attachEvent("on" + type, handle);
					}
				}

	In $.event.remove (line 2521)...
	
							if ( !jQuery.event.special[type] || jQuery.event.special[type].teardown.call(elem, namespaces) === false ) {
								try { // Here
									elem.removeEventListener(type, jQuery.data(elem, "handle"), false);
								}
								catch (e) {
									if (elem.detachEvent)
										elem.detachEvent("on" + type, jQuery.data(elem, "handle"));
								}
							}
*/

/* Does this node belong to SVG? */
function isSVGElem(node) {
	return (node.nodeType == 1 && node.namespaceURI == $.svg.svgNS);
}

})(jQuery);