[gnome-shell-extensions/wip/rstrode/heads-up-display: 2/62] Add top-icons extension

[Ray Strode <halfline src gnome org>]

commit 66321f53be453c64e06345bdf119115c860cb978
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed May 20 17:44:50 2015 +0200

    Add top-icons extension

 extensions/top-icons/extension.js     | 96 +++++++++++++++++++++++++++++++++++
 extensions/top-icons/meson.build      |  5 ++
 extensions/top-icons/metadata.json.in | 10 ++++
 extensions/top-icons/stylesheet.css   |  1 +
 meson.build                           |  1 +
 5 files changed, 113 insertions(+)
---
diff --git a/extensions/top-icons/extension.js b/extensions/top-icons/extension.js
new file mode 100644
index 0000000..a8eec13
--- /dev/null
+++ b/extensions/top-icons/extension.js
@@ -0,0 +1,96 @@
+// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
+/* exported init */
+
+const { Clutter, Shell, St } = imports.gi;
+const Main = imports.ui.main;
+const PanelMenu = imports.ui.panelMenu;
+const System = imports.system;
+
+const PANEL_ICON_SIZE = 16;
+
+const STANDARD_TRAY_ICON_IMPLEMENTATIONS = [
+    'bluetooth-applet',
+    'gnome-sound-applet',
+    'nm-applet',
+    'gnome-power-manager',
+    'keyboard',
+    'a11y-keyboard',
+    'kbd-scrolllock',
+    'kbd-numlock',
+    'kbd-capslock',
+    'ibus-ui-gtk'
+];
+
+class SysTray {
+    constructor() {
+        this._icons = [];
+        this._tray = null;
+    }
+
+    _onTrayIconAdded(o, icon) {
+        let wmClass = icon.wm_class ? icon.wm_class.toLowerCase() : '';
+        if (STANDARD_TRAY_ICON_IMPLEMENTATIONS.includes(wmClass))
+            return;
+
+        let button = new PanelMenu.Button(0.5, null, true);
+
+        let scaleFactor = St.ThemeContext.get_for_stage(global.stage).scale_factor;
+        let iconSize = PANEL_ICON_SIZE * scaleFactor;
+
+        icon.set({
+            width: iconSize,
+            height: iconSize,
+            x_align: Clutter.ActorAlign.CENTER,
+            y_align: Clutter.ActorAlign.CENTER
+        });
+
+        let iconBin = new St.Widget({
+            layout_manager: new Clutter.BinLayout()
+        });
+        iconBin.add_actor(icon);
+        button.add_actor(iconBin);
+
+        this._icons.push(icon);
+
+        button.connect('button-release-event', (actor, event) => {
+            icon.click(event);
+        });
+        button.connect('key-press-event', (actor, event) => {
+            icon.click(event);
+        });
+
+        icon.connect('destroy', () => {
+            button.destroy();
+        });
+
+        let role = wmClass || `${icon}`;
+        Main.panel.addToStatusArea(role, button);
+    }
+
+    _onTrayIconRemoved(o, icon) {
+        let parent = icon.get_parent();
+        parent.destroy();
+        this._icons.splice(this._icons.indexOf(icon), 1);
+    }
+
+    enable() {
+        this._tray = new Shell.TrayManager();
+        this._tray.connect('tray-icon-added',
+            this._onTrayIconAdded.bind(this));
+        this._tray.connect('tray-icon-removed',
+            this._onTrayIconRemoved.bind(this));
+        this._tray.manage_screen(Main.panel.actor);
+    }
+
+    disable() {
+        this._icons.forEach(icon => icon.get_parent().destroy());
+        this._icons = [];
+
+        this._tray = null;
+        System.gc(); // force finalizing tray to unmanage screen
+    }
+}
+
+function init() {
+    return new SysTray();
+}
diff --git a/extensions/top-icons/meson.build b/extensions/top-icons/meson.build
new file mode 100644
index 0000000..48504f6
--- /dev/null
+++ b/extensions/top-icons/meson.build
@@ -0,0 +1,5 @@
+extension_data += configure_file(
+  input: metadata_name + '.in',
+  output: metadata_name,
+  configuration: metadata_conf
+)
diff --git a/extensions/top-icons/metadata.json.in b/extensions/top-icons/metadata.json.in
new file mode 100644
index 0000000..f1e2436
--- /dev/null
+++ b/extensions/top-icons/metadata.json.in
@@ -0,0 +1,10 @@
+{
+"extension-id": "@extension_id@",
+"uuid": "@uuid@",
+"settings-schema": "@gschemaname@",
+"gettext-domain": "@gettext_domain@",
+"name": "Top Icons",
+"description": "Shows legacy tray icons on top",
+"shell-version": [ "@shell_current@" ],
+"url": "http://94.247.144.115/repo/topicons/";
+}
diff --git a/extensions/top-icons/stylesheet.css b/extensions/top-icons/stylesheet.css
new file mode 100644
index 0000000..25134b6
--- /dev/null
+++ b/extensions/top-icons/stylesheet.css
@@ -0,0 +1 @@
+/* This extensions requires no special styling */
diff --git a/meson.build b/meson.build
index b987f2d..6050c32 100644
--- a/meson.build
+++ b/meson.build
@@ -50,6 +50,7 @@ all_extensions = default_extensions
 all_extensions += [
   'auto-move-windows',
   'native-window-placement',
+  'top-icons',
   'user-theme'
 ]