Initial checkin of accessibility extensions.

ui/accessibility/extensions/highcontrast/popup.js

+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+var site;
+var key1;
+var key2;
+
+function setRadio(name, value) {
+  var radios = document.querySelectorAll('input[name="' + name + '"]');
+  for (var i = 0; i < radios.length; i++) {
+    radios[i].checked = (radios[i].value == value);
+    radios[i].disabled = !getEnabled();
+  }
+}
+
+function update() {
+  document.body.className = getEnabled() ? '' : 'disabled';
+
+  if (getEnabled()) {
+    $('title').innerText = 'High Contrast is Enabled';
+    $('toggle').innerHTML = '<b>Disable</b> ' +
+                            '<span class="kb">(' + key1 + ')</span>';
+    $('subcontrols').style.display = 'block';
+  } else {
+    $('title').innerText = 'High Contrast is Disabled';
+    $('toggle').innerHTML = '<b>Enable</b> ' +
+                            '<span class="kb">(' + key1 + ')</span>';
+    $('subcontrols').style.display = 'none';
+  }
+
+  setRadio('keyaction', getKeyAction());
+  if (site) {
+    setRadio('scheme', getSiteScheme(site));
+    $('make_default').disabled = (getSiteScheme(site) == getDefaultScheme());
+  } else {
+    setRadio('scheme', getDefaultScheme());
+  }
+  if (getEnabled()) {
+    document.documentElement.setAttribute(
+        'hc',
+        site ? 'a' + getSiteScheme(site) : 'a' + getDefaultScheme());
+  } else {
+    document.documentElement.setAttribute('hc', 'a0');
+  }
+  chrome.extension.getBackgroundPage().updateTabs();
+}
+
+function onToggle() {
+  setEnabled(!getEnabled());
+  update();
+}
+
+function onForget() {
+  resetSiteSchemes();
+  update();
+}
+
+function onRadioChange(name, value) {
+  switch (name) {
+    case 'keyaction':
+      setKeyAction(value);
+      break;
+    case 'apply':
+      setApply(value);
+      break;
+    case 'scheme':
+      if (site) {
+        setSiteScheme(site, value);
+      } else {
+        setDefaultScheme(value);
+      }
+      break;
+  }
+  update();
+}
+
+function onMakeDefault() {
+  setDefaultScheme(getSiteScheme(site));
+  update();
+}
+
+function addRadioListeners(name) {
+  var radios = document.querySelectorAll('input[name="' + name + '"]');
+  for (var i = 0; i < radios.length; i++) {
+    radios[i].addEventListener('change', function(evt) {
+      onRadioChange(evt.target.name, evt.target.value);
+    }, false);
+    radios[i].addEventListener('click', function(evt) {
+      onRadioChange(evt.target.name, evt.target.value);
+    }, false);
+  }
+}
+
+function init() {
+  addRadioListeners('keyaction');
+  addRadioListeners('apply');
+  addRadioListeners('scheme');
+  $('toggle').addEventListener('click', onToggle, false);
+  $('make_default').addEventListener('click', onMakeDefault, false);
+  $('forget').addEventListener('click', onForget, false);
+  if (navigator.appVersion.indexOf('Mac') != -1) {
+    key1 = '&#x2318;+Shift+F11';
+    key2 = '&#x2318;+Shift+F12';
+  } else {
+    key1 = 'Shift+F11';
+    key2 = 'Shift+F12';
+  }
+
+  chrome.windows.getLastFocused({'populate': true}, function(window) {
+    for (var i = 0; i < window.tabs.length; i++) {
+      var tab = window.tabs[i];
+      if (tab.active) {
+        if (isDisallowedUrl(tab.url)) {
+          $('scheme_title').innerText = 'Default color scheme:';
+          $('make_default').style.display = 'none';
+        } else {
+          site = siteFromUrl(tab.url);
+          $('scheme_title').innerHTML = 'Color scheme for <b>' + site +
+              '</b>:<br><span class="kb">(' + key2 + ')</span>';
+          $('make_default').style.display = 'block';
+        }
+        update();
+        return;
+      }
+    }
+    site = 'unknown site';
+    update();
+  });
+}
+
+window.addEventListener('load', init, false);