X-Git-Url: http://git.asbjorn.biz/?p=jquery.git;a=blobdiff_plain;f=src%2Fsupport.js;h=4807ce27eb23c3ca3aca36a9c5612a6f3fbb6c44;hp=20289c99b214b8ac5756b53f298b730947d1e76d;hb=9d306bd73bb47562cd52f0fc4cc158c534cfdfdf;hpb=c9dd5d997229919b8dd4cc402b7b7a465982071a

diff --git a/src/support.js b/src/support.js
index 20289c9..4807ce2 100644
--- a/src/support.js
+++ b/src/support.js
@@ -1,17 +1,18 @@
-(function(){
+(function( jQuery ) {
+
+(function() {
 
 	jQuery.support = {};
 
-	var root = document.documentElement,
-		script = document.createElement("script"),
-		div = document.createElement("div"),
-		id = "script" + (new Date).getTime();
+	var div = document.createElement("div");
 
 	div.style.display = "none";
-	div.innerHTML = '   <link/><table></table><a href="/a" style="color:red;float:left;opacity:.5;">a</a><select><option>text</option></select><object><param></object>';
+	div.innerHTML = "   <link/><table></table><a href='/a' style='color:red;float:left;opacity:.55;'>a</a><input type='checkbox'/>";
 
 	var all = div.getElementsByTagName("*"),
-		a = div.getElementsByTagName("a")[0];
+		a = div.getElementsByTagName("a")[0],
+		select = document.createElement("select"),
+		opt = select.appendChild( document.createElement("option") );
 
 	// Can't get basic test support
 	if ( !all || !all.length || !a ) {
@@ -20,80 +21,201 @@
 
 	jQuery.support = {
 		// IE strips leading whitespace when .innerHTML is used
-		leadingWhitespace: div.firstChild.nodeType == 3,
-		
+		leadingWhitespace: div.firstChild.nodeType === 3,
+
 		// Make sure that tbody elements aren't automatically inserted
 		// IE will insert them into empty tables
 		tbody: !div.getElementsByTagName("tbody").length,
-		
-		// Make sure that you can get all elements in an <object> element
-		// IE 7 always returns no results
-		objectAll: !!div.getElementsByTagName("object")[0]
-			.getElementsByTagName("*").length,
-		
+
 		// Make sure that link elements get serialized correctly by innerHTML
 		// This requires a wrapper element in IE
 		htmlSerialize: !!div.getElementsByTagName("link").length,
-		
+
 		// Get the style information from getAttribute
 		// (IE uses .cssText insted)
 		style: /red/.test( a.getAttribute("style") ),
-		
+
 		// Make sure that URLs aren't manipulated
 		// (IE normalizes it by default)
 		hrefNormalized: a.getAttribute("href") === "/a",
-		
+
 		// Make sure that element opacity exists
 		// (IE uses filter instead)
-		opacity: a.style.opacity === "0.5",
-		
+		// Use a regex to work around a WebKit issue. See #5145
+		opacity: /^0.55$/.test( a.style.opacity ),
+
 		// Verify style float existence
 		// (IE uses styleFloat instead of cssFloat)
 		cssFloat: !!a.style.cssFloat,
 
+		// Make sure that if no value is specified for a checkbox
+		// that it defaults to "on".
+		// (WebKit defaults to "" instead)
+		checkOn: div.getElementsByTagName("input")[0].value === "on",
+
+		// Make sure that a selected-by-default option has a working selected property.
+		// (WebKit defaults to false instead of true, IE too, if it's in an optgroup)
+		optSelected: opt.selected,
+
 		// Will be defined later
-		scriptEval: false,
-		noCloneEvent: true
+		deleteExpando: true,
+		optDisabled: false,
+		checkClone: false,
+		_scriptEval: null,
+		noCloneEvent: true,
+		boxModel: null,
+		inlineBlockNeedsLayout: false,
+		shrinkWrapBlocks: false,
+		reliableHiddenOffsets: true
+	};
+
+	// Make sure that the options inside disabled selects aren't marked as disabled
+	// (WebKit marks them as diabled)
+	select.disabled = true;
+	jQuery.support.optDisabled = !opt.disabled;
+
+	jQuery.support.scriptEval = function() {
+		if ( jQuery.support._scriptEval === null ) {
+			var root = document.documentElement,
+				script = document.createElement("script"),
+				id = "script" + jQuery.now();
+
+			script.type = "text/javascript";
+			try {
+				script.appendChild( document.createTextNode( "window." + id + "=1;" ) );
+			} catch(e) {}
+
+			root.insertBefore( script, root.firstChild );
+
+			// Make sure that the execution of code works by injecting a script
+			// tag with appendChild/createTextNode
+			// (IE doesn't support this, fails, and uses .text instead)
+			if ( window[ id ] ) {
+				jQuery.support._scriptEval = true;
+				delete window[ id ];
+			} else {
+				jQuery.support._scriptEval = false;
+			}
+
+			root.removeChild( script );
+			// release memory in IE
+			root = script = id  = null;
+		}
+
+		return jQuery.support._scriptEval;
 	};
-	
-	script.type = "text/javascript";
+
+	// Test to see if it's possible to delete an expando from an element
+	// Fails in Internet Explorer
 	try {
-		script.appendChild( document.createTextNode( "window." + id + "=1;" ) );
-	} catch(e){}
-
-	root.insertBefore( script, root.firstChild );
-	
-	// Make sure that the execution of code works by injecting a script
-	// tag with appendChild/createTextNode
-	// (IE doesn't support this, fails, and uses .text instead)
-	if ( window[ id ] ) {
-		jQuery.support.scriptEval = true;
-		delete window[ id ];
-	}
+		delete div.test;
 
-	root.removeChild( script );
+	} catch(e) {
+		jQuery.support.deleteExpando = false;
+	}
 
 	if ( div.attachEvent && div.fireEvent ) {
-		div.attachEvent("onclick", function(){
+		div.attachEvent("onclick", function click() {
 			// Cloning a node shouldn't copy over any
 			// bound event handlers (IE does this)
 			jQuery.support.noCloneEvent = false;
+			div.detachEvent("onclick", click);
 		});
 		div.cloneNode(true).fireEvent("onclick");
 	}
 
-})();
+	div = document.createElement("div");
+	div.innerHTML = "<input type='radio' name='radiotest' checked='checked'/>";
+
+	var fragment = document.createDocumentFragment();
+	fragment.appendChild( div.firstChild );
+
+	// WebKit doesn't clone checked state correctly in fragments
+	jQuery.support.checkClone = fragment.cloneNode(true).cloneNode(true).lastChild.checked;
+
+	// Figure out if the W3C box model works as expected
+	// document.body must exist before we can do this
+	jQuery(function() {
+		var div = document.createElement("div"),
+			body = document.getElementsByTagName("body")[0];
+
+		// Frameset documents with no body should not run this code
+		if ( !body ) {
+			return;
+		}
+
+		div.style.width = div.style.paddingLeft = "1px";
+		body.appendChild( div );
+		jQuery.boxModel = jQuery.support.boxModel = div.offsetWidth === 2;
+
+		if ( "zoom" in div.style ) {
+			// Check if natively block-level elements act like inline-block
+			// elements when setting their display to 'inline' and giving
+			// them layout
+			// (IE < 8 does this)
+			div.style.display = "inline";
+			div.style.zoom = 1;
+			jQuery.support.inlineBlockNeedsLayout = div.offsetWidth === 2;
+
+			// Check if elements with layout shrink-wrap their children
+			// (IE 6 does this)
+			div.style.display = "";
+			div.innerHTML = "<div style='width:4px;'></div>";
+			jQuery.support.shrinkWrapBlocks = div.offsetWidth !== 2;
+		}
+
+		div.innerHTML = "<table><tr><td style='padding:0;border:0;display:none'></td><td>t</td></tr></table>";
+		var tds = div.getElementsByTagName("td");
+
+		// Check if table cells still have offsetWidth/Height when they are set
+		// to display:none and there are still other visible table cells in a
+		// table row; if so, offsetWidth/Height are not reliable for use when
+		// determining if an element has been hidden directly using
+		// display:none (it is still safe to use offsets if a parent element is
+		// hidden; don safety goggles and see bug #4512 for more information).
+		// (only IE 8 fails this test)
+		jQuery.support.reliableHiddenOffsets = tds[0].offsetHeight === 0;
 
-var styleFloat = jQuery.support.cssFloat ? "cssFloat" : "styleFloat";
-
-jQuery.props = {
-	"for": "htmlFor",
-	"class": "className",
-	"float": styleFloat,
-	cssFloat: styleFloat,
-	styleFloat: styleFloat,
-	readonly: "readOnly",
-	maxlength: "maxLength",
-	cellspacing: "cellSpacing",
-	rowspan: "rowSpan"
-};
\ No newline at end of file
+		tds[0].style.display = "";
+		tds[1].style.display = "none";
+
+		// Check if empty table cells still have offsetWidth/Height
+		// (IE < 8 fail this test)
+		jQuery.support.reliableHiddenOffsets = jQuery.support.reliableHiddenOffsets && tds[0].offsetHeight === 0;
+		div.innerHTML = "";
+
+		body.removeChild( div ).style.display = "none";
+		div = tds = null;
+	});
+
+	// Technique from Juriy Zaytsev
+	// http://thinkweb2.com/projects/prototype/detecting-event-support-without-browser-sniffing/
+	var eventSupported = function( eventName ) {
+		var el = document.createElement("div");
+		eventName = "on" + eventName;
+
+		// We only care about the case where non-standard event systems
+		// are used, namely in IE. Short-circuiting here helps us to
+		// avoid an eval call (in setAttribute) which can cause CSP
+		// to go haywire. See: https://developer.mozilla.org/en/Security/CSP
+		if ( !el.attachEvent ) {
+			return true;
+		}
+
+		var isSupported = (eventName in el);
+		if ( !isSupported ) {
+			el.setAttribute(eventName, "return;");
+			isSupported = typeof el[eventName] === "function";
+		}
+		el = null;
+
+		return isSupported;
+	};
+
+	jQuery.support.submitBubbles = eventSupported("submit");
+	jQuery.support.changeBubbles = eventSupported("change");
+
+	// release memory in IE
+	div = all = a = null;
+})();
+})( jQuery );