From e44a7e37b6c7b5961adaffc62b9042b8d442938e Mon Sep 17 00:00:00 2001
From: mensonge
Date: Thu, 13 Nov 2008 09:49:11 +0000
Subject: New feature: basic Ajax suggestion for tags and implementation of
 Dojo toolkit

git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f
---
 includes/js/dijit/_base/wai.js | 143 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 includes/js/dijit/_base/wai.js

(limited to 'includes/js/dijit/_base/wai.js')

diff --git a/includes/js/dijit/_base/wai.js b/includes/js/dijit/_base/wai.js
new file mode 100644
index 0000000..a9d47a2
--- /dev/null
+++ b/includes/js/dijit/_base/wai.js
@@ -0,0 +1,143 @@
+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:
+		//		Detects if we are in high-contrast mode or not
+
+		// 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 = dojo.doc.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("dojo", "resources/blank.gif") + '");';
+		dojo.body().appendChild(div);
+
+		// test it
+		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");
+			dojo.body().removeChild(div);
+		}
+	}
+};
+
+// 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: Determines if an element has a role.
+		// returns: true if elem has a role attribute and false if not.
+		return elem.hasAttribute ? elem.hasAttribute("role") : !!elem.getAttribute("role");
+	},
+
+	getWaiRole: function(/*Element*/ elem){
+		// summary: Gets the role for an element.
+		// returns:
+		//		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: Sets the role on an element.
+		// description:
+		//		On Firefox 2 and below, "wairole:" is
+		//		prepended to the provided role value.
+		elem.setAttribute("role", (dojo.isFF && dojo.isFF < 3) ? "wairole:" + role : role);
+	},
+
+	removeWaiRole: function(/*Element*/ elem){
+		// summary: Removes the role from an element.
+		elem.removeAttribute("role");
+	},
+
+	hasWaiState: function(/*Element*/ elem, /*String*/ state){
+		// summary: Determines if an element has a given state.
+		// description:
+		//		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.
+		// returns:
+		//		true if elem has a value for the given state and
+		//		false if it does not.
+		if(dojo.isFF && dojo.isFF < 3){
+			return elem.hasAttributeNS("http://www.w3.org/2005/07/aaa", state);
+		}else{
+			return elem.hasAttribute ? elem.hasAttribute("aria-"+state) : !!elem.getAttribute("aria-"+state);
+		}
+	},
+
+	getWaiState: function(/*Element*/ elem, /*String*/ state){
+		// summary: Gets the value of a state on an element.
+		// description:
+		//		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.
+		// returns:
+		//		The value of the requested state on elem
+		//		or an empty string if elem has no value for 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: Sets a state on an element.
+		// description:
+		//		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 a state from an element.
+		// description:
+		//		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);
+		}
+	}
+});
+
+}
-- 
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