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366// Accessibility Image Validator
(function () {
'use strict';
const GITHUB_ISSUE_BASE =
'https://github.com/EqualifyEverything/benchmarks-ai-alt/issues/new';
// State
let sessionId = null;
let sessionActive = false;
let currentIndex = 0;
let results = [];
let corpus = [];
let pendingDecision = null; // 'accepted' or 'rejected'
// DOM refs
const els = {};
function init() {
// Cache elements
els.startBtn = document.getElementById('start-session');
els.endBtn = document.getElementById('end-session');
els.sessionStatus = document.getElementById('session-status');
els.sessionId = document.getElementById('session-id-display');
els.progressCount = document.getElementById('progress-count');
els.totalCount = document.getElementById('total-count');
els.progressBar = document.getElementById('progress-bar');
els.progressFill = document.getElementById('progress-fill');
els.card = document.getElementById('validation-card');
els.image = document.getElementById('current-image');
els.placeholder = document.getElementById('image-placeholder');
els.altText = document.getElementById('current-alt');
els.altSource = document.getElementById('current-alt-source');
els.acceptBtn = document.getElementById('accept-btn');
els.rejectBtn = document.getElementById('reject-btn');
els.reasonGroup = document.getElementById('reason-group');
els.reasonInput = document.getElementById('reason-input');
els.reasonLabel = document.getElementById('reason-label');
els.reasonHint = document.getElementById('reason-hint');
els.submitBtn = document.getElementById('submit-btn');
els.cancelBtn = document.getElementById('cancel-btn');
els.results = document.getElementById('results');
els.resultsSummary = document.getElementById('results-summary');
els.downloadBtn = document.getElementById('download-results');
els.issueLink = document.getElementById('github-issue-link');
els.contextPage = document.getElementById('context-page');
els.contextRole = document.getElementById('context-role');
els.contextAlt = document.getElementById('context-alt');
els.contextSurrounding = document.getElementById('context-surrounding');
// Events
els.startBtn.addEventListener('click', startSession);
els.endBtn.addEventListener('click', endSession);
els.acceptBtn.addEventListener('click', function () { choose('accepted'); });
els.rejectBtn.addEventListener('click', function () { choose('rejected'); });
els.submitBtn.addEventListener('click', submitReason);
els.cancelBtn.addEventListener('click', cancelReason);
els.downloadBtn.addEventListener('click', downloadResults);
// Keyboard: Enter in textarea submits
els.reasonInput.addEventListener('keydown', function (e) {
if (e.key === 'Enter' && e.ctrlKey) {
submitReason();
}
});
loadCorpus();
}
// Data loading
async function loadCorpus() {
try {
let response = await fetch('./functional-images.jsonl');
if (!response.ok) {
response = await fetch(
'../projects/corpus-construction/corpus/functional-images.jsonl'
);
}
const text = await response.text();
corpus = text.trim().split('\n').map(function (line) {
try { return JSON.parse(line); }
catch (e) { return null; }
}).filter(Boolean);
} catch (err) {
console.error('Failed to load corpus:', err);
}
}
// Session management
function startSession() {
if (corpus.length === 0) {
alert('No corpus data loaded. Check the data file.');
return;
}
sessionId = 'v-' + Date.now().toString(36) + '-' +
Math.random().toString(36).substr(2, 5);
sessionActive = true;
currentIndex = 0;
results = [];
pendingDecision = null;
els.sessionId.textContent = sessionId;
els.totalCount.textContent = corpus.length;
updateProgress();
show(els.sessionStatus);
show(els.card);
hide(els.results);
els.startBtn.disabled = true;
els.startBtn.setAttribute('aria-disabled', 'true');
els.endBtn.disabled = false;
els.endBtn.removeAttribute('aria-disabled');
loadItem();
}
function endSession() {
sessionActive = false;
pendingDecision = null;
hide(els.card);
hide(els.sessionStatus);
hide(els.reasonGroup);
show(els.results);
els.startBtn.disabled = false;
els.startBtn.removeAttribute('aria-disabled');
els.endBtn.disabled = true;
els.endBtn.setAttribute('aria-disabled', 'true');
// Summary
var accepted = results.filter(function (r) { return r.status === 'accepted'; }).length;
var rejected = results.filter(function (r) { return r.status === 'rejected'; }).length;
var total = corpus.length;
var reviewed = results.length;
els.resultsSummary.textContent =
'You reviewed ' + reviewed + ' of ' + total + ' items. ' +
accepted + ' accepted, ' + rejected + ' rejected.';
// Update issue link
var params = new URLSearchParams({
template: 'validation-report.md',
labels: 'validation report',
title: '[Validation Report] ' + sessionId
});
els.issueLink.href = GITHUB_ISSUE_BASE + '?' + params.toString();
}
// The text under review, in the order a browser resolves it.
function announcedName(item) {
if (typeof item.accessible_name === 'string'
&& item.accessible_name !== '') {
return item.accessible_name;
}
return item.observed_alt || '';
}
var SOURCE_LABELS = {
'alt': "the image's alt attribute",
'aria-label': 'an aria-label',
'aria-labelledby': 'an aria-labelledby reference',
'title': 'a title attribute',
'svg-title': 'a title inside the SVG',
'control-text': "the link or button's own text"
};
function sourceLabel(item) {
return SOURCE_LABELS[item.accessible_name_source]
|| 'text in the markup';
}
// Whether the image itself carries alt text, separately from whatever the
// surrounding control contributes.
function altAttributeLabel(item) {
if (item.observed_alt === null || item.observed_alt === undefined) {
return '(no alt attribute on the image)';
}
if (item.observed_alt === '') {
return '(alt="", deliberately empty)';
}
return item.observed_alt;
}
// Validation flow
function loadItem() {
if (currentIndex >= corpus.length) {
endSession();
return;
}
var item = corpus[currentIndex];
// Image
var imageSrc = null;
if (item.image_file) {
// Prefer local downloaded image
imageSrc = '../corpus-construction/' + item.image_file;
} else if (item.image_url) {
imageSrc = item.image_url;
}
// What a screen reader actually announces. For many items the text
// lives on the link or button rather than on the image itself, so
// observed_alt alone would show nothing to judge.
var announced = announcedName(item);
if (imageSrc) {
els.image.src = imageSrc;
els.image.alt = announced;
els.image.style.display = '';
hide(els.placeholder);
// Remove any previously rendered inline SVG
var oldSvg = document.querySelector('.card-image .inline-svg');
if (oldSvg) oldSvg.remove();
} else if (item.element_html && item.element_html.indexOf('<svg') !== -1) {
// Render the inline SVG from element_html
els.image.style.display = 'none';
hide(els.placeholder);
var oldSvg = document.querySelector('.card-image .inline-svg');
if (oldSvg) oldSvg.remove();
var svgMatch = item.element_html.match(/<svg[\s\S]*<\/svg>/);
if (svgMatch) {
var wrapper = document.createElement('div');
wrapper.className = 'inline-svg';
wrapper.setAttribute('role', 'img');
wrapper.setAttribute('aria-label', announced);
wrapper.innerHTML = svgMatch[0];
document.querySelector('.card-image').appendChild(wrapper);
}
} else {
els.image.src = '';
els.image.alt = '';
els.image.style.display = 'none';
hide(els.placeholder);
var oldSvg = document.querySelector('.card-image .inline-svg');
if (oldSvg) oldSvg.remove();
show(els.placeholder);
}
// Alt text display
els.altText.textContent = announced || '(no text at all)';
if (els.altSource) {
els.altSource.textContent = announced
? 'Written in the page as ' + sourceLabel(item) + '.'
: '';
}
// Context
els.contextPage.textContent = item.page_url || 'Unknown';
els.contextRole.textContent = item.element_role || 'Unknown';
if (els.contextAlt) {
els.contextAlt.textContent = altAttributeLabel(item);
}
els.contextSurrounding.textContent =
item.surrounding_text || '(none)';
// Reset decision UI
resetDecisionUI();
updateProgress();
}
function choose(decision) {
pendingDecision = decision;
// Update label based on decision
if (decision === 'accepted') {
els.reasonLabel.textContent = 'Reason for accepting';
} else {
els.reasonLabel.textContent = 'Reason for rejecting';
}
els.reasonHint.textContent = 'Optional.';
// Show reason group
show(els.reasonGroup);
// Disable decision buttons while entering reason
els.acceptBtn.disabled = true;
els.rejectBtn.disabled = true;
// Focus the textarea
els.reasonInput.focus();
}
function submitReason() {
var reason = els.reasonInput.value.trim();
results.push({
id: corpus[currentIndex].id,
status: pendingDecision,
reason: reason || null,
timestamp: new Date().toISOString()
});
// Advance
pendingDecision = null;
els.reasonInput.value = '';
currentIndex++;
loadItem();
}
function cancelReason() {
pendingDecision = null;
els.reasonInput.value = '';
els.reasonInput.removeAttribute('aria-invalid');
resetDecisionUI();
els.acceptBtn.focus();
}
function resetDecisionUI() {
hide(els.reasonGroup);
els.acceptBtn.disabled = false;
els.rejectBtn.disabled = false;
}
// Progress
function updateProgress() {
var reviewed = Math.min(currentIndex, corpus.length);
els.progressCount.textContent = reviewed;
var pct = corpus.length > 0
? Math.round((reviewed / corpus.length) * 100)
: 0;
els.progressFill.style.width = pct + '%';
els.progressBar.setAttribute('aria-valuenow', pct);
}
// Results export
function downloadResults() {
var data = {
session_id: sessionId,
timestamp: new Date().toISOString(),
corpus_size: corpus.length,
reviewed: results.length,
accepted: results.filter(function (r) { return r.status === 'accepted'; }).length,
rejected: results.filter(function (r) { return r.status === 'rejected'; }).length,
results: results
};
var json = JSON.stringify(data, null, 2);
var blob = new Blob([json], { type: 'application/json' });
var url = URL.createObjectURL(blob);
var a = document.createElement('a');
a.href = url;
a.download = 'validation-' + sessionId + '.json';
a.click();
URL.revokeObjectURL(url);
}
// Helpers
function show(el) {
if (typeof el === 'string') el = document.getElementById(el);
el.classList.remove('hidden');
}
function hide(el) {
if (typeof el === 'string') el = document.getElementById(el);
el.classList.add('hidden');
}
// Boot
document.addEventListener('DOMContentLoaded', init);
})();