X-Git-Url: http://git.asbjorn.it/?a=blobdiff_plain;f=src%2Fsupport.js;h=939ad4fcb55a457fe926552232ba2201b6dbf97b;hb=9523bb5ef02d4a106c7a6be540aa222a0d0bb01d;hp=c334e78d600cd113609cc32da7e06e2f2bdc4fc2;hpb=122b672f704cca094de50dfef05e88faa84cb51d;p=jquery.git
diff --git a/src/support.js b/src/support.js
index c334e78..939ad4f 100644
--- a/src/support.js
+++ b/src/support.js
@@ -1,17 +1,19 @@
-(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 = '
a text ';
+ div.innerHTML = " a ";
var all = div.getElementsByTagName("*"),
- a = div.getElementsByTagName("a")[0];
+ a = div.getElementsByTagName("a")[0],
+ select = document.createElement("select"),
+ opt = select.appendChild( document.createElement("option") ),
+ input = div.getElementsByTagName("input")[0];
// Can't get basic test support
if ( !all || !all.length || !a ) {
@@ -20,86 +22,216 @@
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 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,
- // Verify tabindex attribute existence
- // (IE uses tabIndex instead of tabindex)
- tabindex: !a.getAttributeNode('tabindex'),
+ // Make sure that if no value is specified for a checkbox
+ // that it defaults to "on".
+ // (WebKit defaults to "" instead)
+ checkOn: input.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,
+ noCloneEvent: true,
+ noCloneChecked: true,
+ boxModel: null,
+ inlineBlockNeedsLayout: false,
+ shrinkWrapBlocks: false,
+ reliableHiddenOffsets: true,
+ reliableMarginRight: true
};
-
- script.type = "text/javascript";
+
+ input.checked = true;
+ jQuery.support.noCloneChecked = input.cloneNode( true ).checked;
+
+ // 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;
+
+ var _scriptEval = null;
+ jQuery.support.scriptEval = function() {
+ if ( _scriptEval === null ) {
+ var root = document.documentElement,
+ script = document.createElement("script"),
+ id = "script" + jQuery.now();
+
+ 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 ] ) {
+ _scriptEval = true;
+ delete window[ id ];
+ } else {
+ _scriptEval = false;
+ }
+
+ root.removeChild( script );
+ // release memory in IE
+ root = script = id = null;
+ }
+
+ return _scriptEval;
+ };
+
+ // 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(){
+ if ( !div.addEventListener && div.attachEvent && div.fireEvent ) {
+ 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", arguments.callee);
+ div.detachEvent("onclick", click);
});
div.cloneNode(true).fireEvent("onclick");
}
-})();
+ div = document.createElement("div");
+ div.innerHTML = " ";
-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",
- tabindex: jQuery.support.tabindex ? "tabindex" : "tabIndex"
-};
+ 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 = "
";
+ jQuery.support.shrinkWrapBlocks = div.offsetWidth !== 2;
+ }
+
+ div.innerHTML = "";
+ 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;
+
+ 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 = "";
+
+ // Check if div with explicit width and no margin-right incorrectly
+ // gets computed margin-right based on width of container. For more
+ // info see bug #3333
+ // Fails in WebKit before Feb 2011 nightlies
+ // WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
+ if ( document.defaultView && document.defaultView.getComputedStyle ) {
+ div.style.width = "1px";
+ div.style.marginRight = "0";
+ jQuery.support.reliableMarginRight = ( parseInt(document.defaultView.getComputedStyle(div).marginRight, 10) || 0 ) === 0;
+ }
+
+ 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 );