Page MenuHomeCode
Files F947376

wai.js
No OneTemporary
Actions

wai.js
View Options

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);
}
}
});
}

File Metadata

Mime Type
text/plain
Expires
Sat, Apr 26, 11:35 (1 d, 17 h)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
25608
Default Alt Text
wai.js (4 KB)

Event Timeline