1 files changed, 153 insertions, 0 deletions
diff --git a/js/ui/status/accessibility.js b/js/ui/status/accessibility.js
new file mode 100644
index 0000000..a4bad14
--- /dev/null
+++ b/js/ui/status/accessibility.js
@@ -0,0 +1,153 @@
+// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
+/* exported ATIndicator */
+
+const { Gio, GLib, GObject, St } = imports.gi;
+
+const PanelMenu = imports.ui.panelMenu;
+const PopupMenu = imports.ui.popupMenu;
+
+const A11Y_SCHEMA                   = 'org.gnome.desktop.a11y';
+const KEY_ALWAYS_SHOW               = 'always-show-universal-access-status';
+
+const A11Y_KEYBOARD_SCHEMA          = 'org.gnome.desktop.a11y.keyboard';
+const KEY_STICKY_KEYS_ENABLED       = 'stickykeys-enable';
+const KEY_BOUNCE_KEYS_ENABLED       = 'bouncekeys-enable';
+const KEY_SLOW_KEYS_ENABLED         = 'slowkeys-enable';
+const KEY_MOUSE_KEYS_ENABLED        = 'mousekeys-enable';
+
+const APPLICATIONS_SCHEMA           = 'org.gnome.desktop.a11y.applications';
+
+var DPI_FACTOR_LARGE              = 1.25;
+
+const WM_SCHEMA                     = 'org.gnome.desktop.wm.preferences';
+const KEY_VISUAL_BELL               = 'visual-bell';
+
+const DESKTOP_INTERFACE_SCHEMA      = 'org.gnome.desktop.interface';
+const KEY_TEXT_SCALING_FACTOR       = 'text-scaling-factor';
+
+const A11Y_INTERFACE_SCHEMA         = 'org.gnome.desktop.a11y.interface';
+const KEY_HIGH_CONTRAST             = 'high-contrast';
+
+var ATIndicator = GObject.registerClass(
+class ATIndicator extends PanelMenu.Button {
+    _init() {
+        super._init(0.5, _("Accessibility"));
+
+        this.add_child(new St.Icon({
+            style_class: 'system-status-icon',
+            icon_name: 'org.gnome.Settings-accessibility-symbolic',
+        }));
+
+        this._a11ySettings = new Gio.Settings({ schema_id: A11Y_SCHEMA });
+        this._a11ySettings.connect(`changed::${KEY_ALWAYS_SHOW}`, this._queueSyncMenuVisibility.bind(this));
+
+        let highContrast = this._buildItem(_('High Contrast'), A11Y_INTERFACE_SCHEMA, KEY_HIGH_CONTRAST);
+        this.menu.addMenuItem(highContrast);
+
+        let magnifier = this._buildItem(_("Zoom"), APPLICATIONS_SCHEMA,
+                                        'screen-magnifier-enabled');
+        this.menu.addMenuItem(magnifier);
+
+        let textZoom = this._buildFontItem();
+        this.menu.addMenuItem(textZoom);
+
+        let screenReader = this._buildItem(_("Screen Reader"), APPLICATIONS_SCHEMA,
+                                           'screen-reader-enabled');
+        this.menu.addMenuItem(screenReader);
+
+        let screenKeyboard = this._buildItem(_("Screen Keyboard"), APPLICATIONS_SCHEMA,
+                                             'screen-keyboard-enabled');
+        this.menu.addMenuItem(screenKeyboard);
+
+        let visualBell = this._buildItem(_("Visual Alerts"), WM_SCHEMA, KEY_VISUAL_BELL);
+        this.menu.addMenuItem(visualBell);
+
+        let stickyKeys = this._buildItem(_("Sticky Keys"), A11Y_KEYBOARD_SCHEMA, KEY_STICKY_KEYS_ENABLED);
+        this.menu.addMenuItem(stickyKeys);
+
+        let slowKeys = this._buildItem(_("Slow Keys"), A11Y_KEYBOARD_SCHEMA, KEY_SLOW_KEYS_ENABLED);
+        this.menu.addMenuItem(slowKeys);
+
+        let bounceKeys = this._buildItem(_("Bounce Keys"), A11Y_KEYBOARD_SCHEMA, KEY_BOUNCE_KEYS_ENABLED);
+        this.menu.addMenuItem(bounceKeys);
+
+        let mouseKeys = this._buildItem(_("Mouse Keys"), A11Y_KEYBOARD_SCHEMA, KEY_MOUSE_KEYS_ENABLED);
+        this.menu.addMenuItem(mouseKeys);
+
+        this._syncMenuVisibility();
+    }
+
+    _syncMenuVisibility() {
+        this._syncMenuVisibilityIdle = 0;
+
+        let alwaysShow = this._a11ySettings.get_boolean(KEY_ALWAYS_SHOW);
+        let items = this.menu._getMenuItems();
+
+        this.visible = alwaysShow || items.some(f => !!f.state);
+
+        return GLib.SOURCE_REMOVE;
+    }
+
+    _queueSyncMenuVisibility() {
+        if (this._syncMenuVisibilityIdle)
+            return;
+
+        this._syncMenuVisibilityIdle = GLib.idle_add(GLib.PRIORITY_DEFAULT, this._syncMenuVisibility.bind(this));
+        GLib.Source.set_name_by_id(this._syncMenuVisibilityIdle, '[gnome-shell] this._syncMenuVisibility');
+    }
+
+    _buildItemExtended(string, initialValue, writable, onSet) {
+        let widget = new PopupMenu.PopupSwitchMenuItem(string, initialValue);
+        if (!writable) {
+            widget.reactive = false;
+        } else {
+            widget.connect('toggled', item => {
+                onSet(item.state);
+            });
+        }
+        return widget;
+    }
+
+    _buildItem(string, schema, key) {
+        let settings = new Gio.Settings({ schema_id: schema });
+        let widget = this._buildItemExtended(string,
+            settings.get_boolean(key),
+            settings.is_writable(key),
+            enabled => settings.set_boolean(key, enabled));
+
+        settings.connect(`changed::${key}`, () => {
+            widget.setToggleState(settings.get_boolean(key));
+
+            this._queueSyncMenuVisibility();
+        });
+
+        return widget;
+    }
+
+    _buildFontItem() {
+        let settings = new Gio.Settings({ schema_id: DESKTOP_INTERFACE_SCHEMA });
+        let factor = settings.get_double(KEY_TEXT_SCALING_FACTOR);
+        let initialSetting = factor > 1.0;
+        let widget = this._buildItemExtended(_("Large Text"),
+            initialSetting,
+            settings.is_writable(KEY_TEXT_SCALING_FACTOR),
+            enabled => {
+                if (enabled) {
+                    settings.set_double(
+                        KEY_TEXT_SCALING_FACTOR, DPI_FACTOR_LARGE);
+                } else {
+                    settings.reset(KEY_TEXT_SCALING_FACTOR);
+                }
+            });
+
+        settings.connect(`changed::${KEY_TEXT_SCALING_FACTOR}`, () => {
+            factor = settings.get_double(KEY_TEXT_SCALING_FACTOR);
+            let active = factor > 1.0;
+            widget.setToggleState(active);
+
+            this._queueSyncMenuVisibility();
+        });
+
+        return widget;
+    }
+});