axSGrease/GreenhouseA11yFixes.user.js at master · jcsteh/axSGrease · GitHub

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// ==UserScript==
// @name Greenhouse Accessibility Fixes
// @namespace http://axSgrease.nvaccess.org/
// @description Improves the accessibility of Greenhouse.
// @author James Teh <jteh@mozilla.com>
// @copyright 2019 Mozilla Corporation
// @license Mozilla Public License version 2.0
// @version 2019.1
// @grant GM_log
// @include https://*.greenhouse.io/*
// ==/UserScript==

/*** Functions for common tweaks. ***/

functionmakeHeading(el,level){
el.setAttribute("role","heading");
el.setAttribute("aria-level",level);
}

functionmakeRegion(el,label){
el.setAttribute("role","region");
el.setAttribute("aria-label",label);
}

functionmakeButton(el,label){
el.setAttribute("role","button");
el.setAttribute("aria-label",label);
}

functionmakePresentational(el){
el.setAttribute("role","presentation");
}

functionsetLabel(el,label){
el.setAttribute("aria-label",label);
}

functionmakeHidden(el){
el.setAttribute("aria-hidden","true");
}

functionsetExpanded(el,expanded){
el.setAttribute("aria-expanded",expanded ? "true" : "false");
}

/*** Code to apply the tweaks when appropriate. ***/

functionapplyTweak(el,tweak){
if(Array.isArray(tweak.tweak)){
let[func, ...args]=tweak.tweak;
func(el, ...args);
}else{
tweak.tweak(el);
}
}

functionapplyTweaks(root,tweaks,checkRoot){
for(lettweakoftweaks){
for(letelofroot.querySelectorAll(tweak.selector)){
applyTweak(el,tweak);
}
if(checkRoot&&root.matches(tweak.selector)){
applyTweak(root,tweak);
}
}
}

letobserver=newMutationObserver(function(mutations){
for(letmutationofmutations){
try{
if(mutation.type==="childList"){
for(letnodeofmutation.addedNodes){
if(node.nodeType!=Node.ELEMENT_NODE){
continue;
}
applyTweaks(node,DYNAMIC_TWEAKS,true);
}
}elseif(mutation.type==="attributes"){
applyTweaks(mutation.target,DYNAMIC_TWEAKS,true);
}
}catch(e){
// Catch exceptions for individual mutations so other mutations are still handled.
GM_log("Exception while handling mutation: "+e);
}
}
});

functioninit(){
applyTweaks(document,LOAD_TWEAKS,false);
applyTweaks(document,DYNAMIC_TWEAKS,false);
observer.observe(document,{childList: true,attributes: DYNAMIC_TWEAK_ATTRIBS.length>0,
subtree: true,attributeFilter: DYNAMIC_TWEAK_ATTRIBS});
}

/*** Define the actual tweaks. ***/

functionlabelRating(el,ratingText){
letname=el.getAttribute("title");
setLabel(el,name+": "+ratingText);
}

// Tweaks that only need to be applied on load.
constLOAD_TWEAKS=[
{selector: '.tabs-nav',
tweak: el=>el.setAttribute("role","tablist")},
{selector: '.tabs-nav > li',
tweak: makePresentational},
];

// Attributes that should be watched for changes and cause dynamic tweaks to be
// applied. For example, if there is a dynamic tweak which handles the state of
// a check box and that state is determined using an attribute, that attribute
// should be included here.
constDYNAMIC_TWEAK_ATTRIBS=["class"];

// Tweaks that must be applied whenever a node is added/changed.
constDYNAMIC_TWEAKS=[
{selector: '.thumbs-up:not(.rating-with-name)',
tweak: [labelRating,"thumbs up"]},
{selector: '.two-thumbs-up:not(.rating-with-name)',
tweak: [labelRating,"two thumbs up"]},
{selector: '.mixed-rating:not(.rating-with-name)',
tweak: [labelRating,"mixed"]},
{selector: '.tabs-nav a',
tweak: el=>{
el.setAttribute("role","tab");
letselected=el.parentElement.classList.contains("selected");
el.setAttribute("aria-selected",selected ? "true" : "false");
}},
{selector: '.closed',
tweak: [setExpanded,false]},
{selector: '.open',
tweak: [setExpanded,true]},
{selector: '.scorecard-attributes-table .name.focus',
tweak: el=>{
// Importance is only indicated through colour.
// We can't just set aria-label here because it doesn't replace the content
// for table cells.
// Therefore, create a visually hidden indicator.
letimportant=document.createElement("span");
important.style="position: absolute; left: -1000px; width: 1px; height: 1px;";
important.setAttribute("aria-label","important");
el.insertBefore(important,el.firstChild);
}},
{selector: '.selectable',
tweak: el=>{
el.setAttribute("role","radio");
letchecked=el.classList.contains("selected");
el.setAttribute("aria-checked",checked ? "true" : "false");
}},
];

/*** Lights, camera, action! ***/
init();