GZ/nwyj/WebContent/admin/scripts/dojo/dijit/_base/wai.js

if (!dojo._hasResource["dijit._base.wai"]) { // _hasResource checks added by
												// build. Do not use
												// _hasResource directly in your
												// code.
	dojo._hasResource["dijit._base.wai"] = true;
	dojo.provide("dijit._base.wai");

	dijit.wai = {
		onload : function() {
			// summary:
			// Function that detects if we are in high-contrast mode or not,
			// and sets up a timer to periodically confirm the value.
			// figure out the background-image style property
			// and apply that to the image.src property.
			// description:
			// This must be a named function and not an anonymous
			// function, so that the widget parsing code can make sure it
			// registers its onload function after this function.
			// DO NOT USE "this" within this function.

			// create div for testing if high contrast mode is on or images are
			// turned off
			var div = document.createElement("div");
			div.id = "a11yTestNode";
			div.style.cssText = 'border: 1px solid;'
					+ 'border-color:red green;' + 'position: absolute;'
					+ 'height: 5px;' + 'top: -999px;'
					+ 'background-image: url("'
					+ dojo.moduleUrl("dijit", "form/templates/blank.gif")
					+ '");';
			dojo.body().appendChild(div);

			// test it
			function check() {
				var cs = dojo.getComputedStyle(div);
				if (cs) {
					var bkImg = cs.backgroundImage;
					var needsA11y = (cs.borderTopColor == cs.borderRightColor)
							|| (bkImg != null && (bkImg == "none" || bkImg == "url(invalid-url:)"));
					dojo[needsA11y ? "addClass" : "removeClass"](dojo.body(),
							"dijit_a11y");
				}
			}
			check();
			if (dojo.isIE) {
				setInterval(check, 4000);
			}
		}
	};

	// Test if computer is in high contrast mode.
	// Make sure the a11y test runs first, before widgets are instantiated.
	if (dojo.isIE || dojo.isMoz) { // NOTE: checking in Safari messes things up
		dojo._loaders.unshift(dijit.wai.onload);
	}

	dojo.mixin(dijit, {
		hasWaiRole : function(/* Element */elem) {
			// Summary: Return true if elem has a role attribute and false if
			// not.
			if (elem.hasAttribute) {
				return elem.hasAttribute("role");
			} else {
				return elem.getAttribute("role") ? true : false;
			}
		},

		getWaiRole : function(/* Element */elem) {
			// Summary: Return the role of elem or an empty string if
			// elem does not have a role.
			var value = elem.getAttribute("role");
			if (value) {
				var prefixEnd = value.indexOf(":");
				return prefixEnd == -1 ? value : value.substring(prefixEnd + 1);
			} else {
				return "";
			}
		},

		setWaiRole : function(/* Element */elem, /* String */role) {
			// Summary: Set the role on elem. On Firefox 2 and below, "wairole:"
			// is
			// prepended to the provided role value.
			if (dojo.isFF && dojo.isFF < 3) {
				elem.setAttribute("role", "wairole:" + role);
			} else {
				elem.setAttribute("role", role);
			}
		},

		removeWaiRole : function(/* Element */elem) {
			// Summary: Removes the role attribute from elem.
			elem.removeAttribute("role");
		},

		hasWaiState : function(/* Element */elem, /* String */state) {
			// Summary: Return true if elem has a value for the given state and
			// false if it does not.
			// On Firefox 2 and below, we check for an attribute in namespace
			// "http://www.w3.org/2005/07/aaa" with a name of the given state.
			// On all other browsers, we check for an attribute called
			// "aria-"+state.
			if (dojo.isFF && dojo.isFF < 3) {
				return elem.hasAttributeNS("http://www.w3.org/2005/07/aaa",
						state);
			} else {
				if (elem.hasAttribute) {
					return elem.hasAttribute("aria-" + state);
				} else {
					return elem.getAttribute("aria-" + state) ? true : false;
				}
			}
		},

		getWaiState : function(/* Element */elem, /* String */state) {
			// Summary: Return the value of the requested state on elem
			// or an empty string if elem has no value for state.
			// On Firefox 2 and below, we check for an attribute in namespace
			// "http://www.w3.org/2005/07/aaa" with a name of the given state.
			// On all other browsers, we check for an attribute called
			// "aria-"+state.
			if (dojo.isFF && dojo.isFF < 3) {
				return elem.getAttributeNS("http://www.w3.org/2005/07/aaa",
						state);
			} else {
				var value = elem.getAttribute("aria-" + state);
				return value ? value : "";
			}
		},

		setWaiState : function(/* Element */elem, /* String */state, /* String */
				value) {
			// Summary: Set state on elem to value.
			// On Firefox 2 and below, we set an attribute in namespace
			// "http://www.w3.org/2005/07/aaa" with a name of the given state.
			// On all other browsers, we set an attribute called
			// "aria-"+state.
			if (dojo.isFF && dojo.isFF < 3) {
				elem.setAttributeNS("http://www.w3.org/2005/07/aaa", "aaa:"
								+ state, value);
			} else {
				elem.setAttribute("aria-" + state, value);
			}
		},

		removeWaiState : function(/* Element */elem, /* String */state) {
			// Summary: Removes the given state from elem.
			// On Firefox 2 and below, we remove the attribute in namespace
			// "http://www.w3.org/2005/07/aaa" with a name of the given state.
			// On all other browsers, we remove the attribute called
			// "aria-"+state.
			if (dojo.isFF && dojo.isFF < 3) {
				elem.removeAttributeNS("http://www.w3.org/2005/07/aaa", state);
			} else {
				elem.removeAttribute("aria-" + state);
			}
		}
	});

}