Subversion Repositories Applications.papyrus

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);
                }
        }
});

}