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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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