initial commit

.local/share/gnome-shell/extensions/workspaces-bar@fthx/extension.js

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+/* 
+	Workspaces Bar
+	Copyright Francois Thirioux 2021
+	GitHub contributors: @fthx
+	License GPL v3
+*/
+
+
+const { Clutter, Gio, GObject, Shell, St } = imports.gi;
+
+const Main = imports.ui.main;
+const PanelMenu = imports.ui.panelMenu;
+
+var WORKSPACES_SCHEMA = "org.gnome.desktop.wm.preferences";
+var WORKSPACES_KEY = "workspace-names";
+
+
+var WorkspacesBar = GObject.registerClass(
+class WorkspacesBar extends PanelMenu.Button {
+	_init() {
+		super._init(0.0, 'Workspaces bar');
+		
+		// define gsettings schema for workspaces names, get workspaces names, signal for settings key changed
+		this.workspaces_settings = new Gio.Settings({ schema: WORKSPACES_SCHEMA });
+		this.workspaces_names_changed = this.workspaces_settings.connect(`changed::${WORKSPACES_KEY}`, this._update_workspaces_names.bind(this));
+	
+		// hide Activities button
+		this._show_activities(false);
+	
+		// bar creation
+		this.ws_bar = new St.BoxLayout({});
+        this._update_workspaces_names();
+        this.add_child(this.ws_bar);
+        
+        // signals for workspaces state: active workspace, number of workspaces
+		this._ws_active_changed = global.workspace_manager.connect('active-workspace-changed', this._update_ws.bind(this));
+		this._ws_number_changed = global.workspace_manager.connect('notify::n-workspaces', this._update_ws.bind(this));
+		this._restacked = global.display.connect('restacked', this._update_ws.bind(this));
+		this._windows_changed = Shell.WindowTracker.get_default().connect('tracked-windows-changed', this._update_ws.bind(this));
+	}
+
+	// remove signals, restore Activities button, destroy workspaces bar
+	_destroy() {
+		this._show_activities(true);
+		if (this._ws_active_changed) {
+			global.workspace_manager.disconnect(this._ws_active_changed);
+		}
+		if (this._ws_number_changed) {
+			global.workspace_manager.disconnect(this._ws_number_changed);
+		}
+		if (this._restacked) {
+			global.display.disconnect(this._restacked);
+		}
+		if (this._windows_changed) {
+			Shell.WindowTracker.get_default().disconnect(this._windows_changed);
+		}
+		if (this.workspaces_names_changed) {
+			this.workspaces_settings.disconnect(this.workspaces_names_changed);
+		}
+		this.ws_bar.destroy();
+		super.destroy();
+	}
+	
+	// hide Activities button
+	_show_activities(show) {
+		this.activities_button = Main.panel.statusArea['activities'];
+		if (this.activities_button) {
+			if (show && !Main.sessionMode.isLocked) {
+				this.activities_button.container.show();
+			} else {
+				this.activities_button.container.hide();
+			}
+		}
+	}
+	
+	// update workspaces names
+	_update_workspaces_names() {
+		this.workspaces_names = this.workspaces_settings.get_strv(WORKSPACES_KEY);
+		this._update_ws();
+	}
+
+	// update the workspaces bar
+    _update_ws() {
+    	// destroy old workspaces bar buttons
+    	this.ws_bar.destroy_all_children();
+    	
+    	// get number of workspaces
+        this.ws_count = global.workspace_manager.get_n_workspaces();
+        this.active_ws_index = global.workspace_manager.get_active_workspace_index();
+		
+		// display all current workspaces buttons
+        for (let ws_index = 0; ws_index < this.ws_count; ++ws_index) {
+			this.ws_box = new St.Bin({visible: true, reactive: true, can_focus: true, track_hover: true});						
+			this.ws_box.label = new St.Label({y_align: Clutter.ActorAlign.CENTER});
+			if (ws_index == this.active_ws_index) {
+				if (global.workspace_manager.get_workspace_by_index(ws_index).n_windows > 0) {
+					this.ws_box.label.style_class = 'desktop-label-nonempty-active';
+				} else {
+					this.ws_box.label.style_class = 'desktop-label-empty-active';
+				}
+			} else {
+				if (global.workspace_manager.get_workspace_by_index(ws_index).n_windows > 0) {
+					this.ws_box.label.style_class = 'desktop-label-nonempty-inactive';
+				} else {
+					this.ws_box.label.style_class = 'desktop-label-empty-inactive';
+				}
+			}
+			if (this.workspaces_names[ws_index]) {
+				this.ws_box.label.set_text("  " + this.workspaces_names[ws_index] + "  ");
+			} else {
+				this.ws_box.label.set_text("  " + (ws_index + 1) + "  ");
+			}
+			this.ws_box.set_child(this.ws_box.label);
+			this.ws_box.connect('button-release-event', () => this._toggle_ws(ws_index) );
+	        this.ws_bar.add_actor(this.ws_box);
+		}
+    }
+
+    // activate workspace or show overview
+    _toggle_ws(ws_index) {
+		if (global.workspace_manager.get_active_workspace_index() == ws_index) {
+			Main.overview.toggle();
+		} else {
+			global.workspace_manager.get_workspace_by_index(ws_index).activate(global.get_current_time());
+		}
+    }
+});
+
+class Extension {
+    constructor() {
+    }
+
+    enable() {
+    	this.workspaces_bar = new WorkspacesBar();
+    	Main.panel.addToStatusArea('workspaces-bar', this.workspaces_bar, 0, 'left');
+    }
+
+    disable() {
+    	this.workspaces_bar._destroy();
+    }
+}
+
+function init() {
+	return new Extension();
+}
+