keyboard: Add languages selection popup

Currently the language options displayed pretty much mirror those of the
top bar keyboard layout selection popup. It may make sense in the future
to only list languages, and automatically switch to the enabled IMs that
the OSK can benefit from (eg. by filling in suggestions).

js/ui/keyboard.js

@@ -16,7 +16,9 @@ const InputSourceManager = imports.ui.status.keyboard;
 const BoxPointer = imports.ui.boxpointer;
 const Layout = imports.ui.layout;
 const Main = imports.ui.main;
+const PopupMenu = imports.ui.popupMenu;
 const Tweener = imports.ui.tweener;
+const Util = imports.misc.util;
 
 var KEYBOARD_REST_TIME = Layout.KEYBOARD_ANIMATION_TIME * 2 * 1000;
 var KEY_LONG_PRESS_TIME = 250;
@@ -38,19 +40,19 @@ const defaultKeysPost = [
     [ [{ label: '⌫', width: 1.5, keyval: Clutter.KEY_BackSpace }],
       [{ label: '⏎', width: 2, keyval: Clutter.KEY_Return, extraClassName: 'enter-key' }],
       [{ label: '⇧', width: 3, level: 1, right: true }],
-      [{ label: '🌐', width: 1.5 }, { label: '⌨', width: 1.5, action: 'hide' }] ],
+      [{ label: '🌐', width: 1.5, action: 'languageMenu' }, { label: '⌨', width: 1.5, action: 'hide' }] ],
     [ [{ label: '⌫', width: 1.5, keyval: Clutter.KEY_BackSpace }],
       [{ label: '⏎', width: 2, keyval: Clutter.KEY_Return, extraClassName: 'enter-key' }],
       [{ label: '⇪', width: 3, level: 0, right: true }],
-      [{ label: '🌐', width: 1.5 }, { label: '⌨', width: 1.5, action: 'hide' }] ],
+      [{ label: '🌐', width: 1.5, action: 'languageMenu' }, { label: '⌨', width: 1.5, action: 'hide' }] ],
     [ [{ label: '⌫', width: 1.5, keyval: Clutter.KEY_BackSpace }],
       [{ label: '⏎', width: 2, keyval: Clutter.KEY_Return, extraClassName: 'enter-key' }],
       [{ label: '=/<', width: 3, level: 3, right: true }],
-      [{ label: '🌐', width: 1.5 }, { label: '⌨', width: 1.5, action: 'hide' }] ],
+      [{ label: '🌐', width: 1.5, action: 'languageMenu' }, { label: '⌨', width: 1.5, action: 'hide' }] ],
     [ [{ label: '⌫', width: 1.5, keyval: Clutter.KEY_BackSpace }],
       [{ label: '⏎', width: 2, keyval: Clutter.KEY_Return, extraClassName: 'enter-key' }],
       [{ label: '?123', width: 3, level: 2, right: true }],
-      [{ label: '🌐', width: 1.5 }, { label: '⌨', width: 1.5, action: 'hide' }] ],
+      [{ label: '🌐', width: 1.5, action: 'languageMenu' }, { label: '⌨', width: 1.5, action: 'hide' }] ],
 ];
 
 var KeyContainer = new Lang.Class({
@@ -174,6 +176,73 @@ var Suggestions = new Lang.Class({
 });
 Signals.addSignalMethods(Suggestions.prototype);
 
+var LanguageSelectionPopup = new Lang.Class({
+    Name: 'LanguageSelectionPopup',
+    Extends: PopupMenu.PopupMenu,
+
+    _init: function(actor) {
+        this.parent(actor, 0.5, St.Side.BOTTOM);
+
+        let inputSourceManager = InputSourceManager.getInputSourceManager();
+        let inputSources = inputSourceManager.inputSources;
+
+        for (let i in inputSources) {
+            let is = inputSources[i];
+
+            this.addAction(is.displayName, Lang.bind(this, () => {
+                inputSourceManager.activateInputSource(is, true);
+            }));
+        }
+
+        this.addMenuItem(new PopupMenu.PopupSeparatorMenuItem());
+        this.addAction(_("Region & Language Settings"), Lang.bind(this, this._launchSettings));
+        this._capturedEventId = 0;
+
+        this._unmapId = actor.connect('notify::mapped', Lang.bind(this, function() {
+            if (!actor.is_mapped())
+                this.close(true);
+        }));
+    },
+
+    _launchSettings: function() {
+        Util.spawn(['gnome-control-center', 'region']);
+        this.close(true);
+    },
+
+    _onCapturedEvent: function(actor, event) {
+        if (event.get_source() == this.actor ||
+            this.actor.contains(event.get_source()))
+            return Clutter.EVENT_PROPAGATE;
+
+        if (event.type() == Clutter.EventType.BUTTON_RELEASE || event.type() == Clutter.EventType.TOUCH_END)
+            this.close(true);
+
+        return Clutter.EVENT_STOP;
+    },
+
+    open: function(animate) {
+        this.parent(animate);
+        this._capturedEventId = global.stage.connect('captured-event',
+                                                     Lang.bind(this, this._onCapturedEvent));
+    },
+
+    close: function(animate) {
+        this.parent(animate);
+        if (this._capturedEventId != 0) {
+            global.stage.disconnect(this._capturedEventId);
+            this._capturedEventId = 0;
+        }
+    },
+
+    destroy: function() {
+        if (this._capturedEventId != 0)
+            global.stage.disconnect(this._capturedEventId);
+        if (this._unmapId != 0)
+            this.sourceActor.disconnect(this._unmapId);
+        this.parent();
+    },
+});
+
 var Key = new Lang.Class({
     Name: 'Key',
 
@@ -408,6 +477,7 @@ var Keyboard = new Lang.Class({
         this._focusCaretTracker = new FocusCaretTracker.FocusCaretTracker();
         this._focusCaretTracker.connect('focus-changed', Lang.bind(this, this._onFocusChanged));
         this._focusCaretTracker.connect('caret-moved', Lang.bind(this, this._onCaretMoved));
+        this._languagePopup = null;
         this._currentAccessible = null;
         this._caretTrackingEnabled = false;
         this._updateCaretPositionId = 0;
@@ -585,6 +655,11 @@ var Keyboard = new Lang.Class({
         this._keyboard = null;
         this.actor.destroy();
         this.actor = null;
+
+        if (this._languagePopup) {
+            this._languagePopup.destroy();
+            this._languagePopup = null;
+        }
     },
 
     _setupKeyboard: function() {
@@ -709,6 +784,15 @@ var Keyboard = new Lang.Class({
         }
     },
 
+    _popupLanguageMenu: function(keyActor) {
+        if (this._languagePopup)
+            this._languagePopup.destroy();
+
+        this._languagePopup = new LanguageSelectionPopup(keyActor);
+        Main.layoutManager.addChrome(this._languagePopup.actor);
+        this._languagePopup.open(true);
+    },
+
     _loadDefaultKeys: function(keys, layout, numLevels, numKeys) {
         let extraButton;
         for (let i = 0; i < keys.length; i++) {
@@ -725,6 +809,8 @@ var Keyboard = new Lang.Class({
             if (key.width != null)
                 extraButton.setWidth(key.width);
 
+            let actor = extraButton.actor;
+
             extraButton.connect('released', Lang.bind(this, function() {
                 if (switchToLevel != null)
                     this._onLevelChanged(switchToLevel);
@@ -736,6 +822,8 @@ var Keyboard = new Lang.Class({
                     this._keyboardController.keyvalRelease(keyval);
                 else if (action == 'hide')
                     this.hide();
+                else if (action == 'languageMenu')
+                    this._popupLanguageMenu(actor);
             }));
 
             /* Fixup default keys based on the number of levels/keys */

js/ui/status/keyboard.js

@@ -457,7 +457,7 @@ var InputSourceManager = new Lang.Class({
         this._changePerWindowSource();
     },
 
-    _activateInputSource: function(is, interactive) {
+    activateInputSource: function(is, interactive) {
         KeyboardManager.holdKeyboard();
         this._keyboardManager.apply(is.xkbId);
 
@@ -578,7 +578,7 @@ var InputSourceManager = new Lang.Class({
                                      infosList[i].displayName,
                                      infosList[i].shortName,
                                      i);
-            is.connect('activate', Lang.bind(this, this._activateInputSource));
+            is.connect('activate', Lang.bind(this, this.activateInputSource));
 
             if (!(is.shortName in inputSourcesByShortName))
                 inputSourcesByShortName[is.shortName] = [];