From b7bea171b53c4a1daed3c387c4b37b605cb1f2a6 Mon Sep 17 00:00:00 2001
From: Shuming Chan <shuming0207@gmail.com>
Date: Sat, 17 Jun 2017 21:40:40 -0400
Subject: [PATCH] Focuses on default mail client when it is already open.
 closes #8

---
 GmailMessageTray.js  | 27 +++++--------------
 MailClientFocuser.js | 64 ++++++++++++++++++++++++++++++++++++++++++++
 extension.js         |  2 +-
 metadata.json        |  2 +-
 4 files changed, 72 insertions(+), 23 deletions(-)
 create mode 100644 MailClientFocuser.js

diff --git a/GmailMessageTray.js b/GmailMessageTray.js
index 6be22fe..9208ae3 100644
--- a/GmailMessageTray.js
+++ b/GmailMessageTray.js
@@ -26,11 +26,13 @@ const Main = imports.ui.main;
 const Util = imports.misc.util;
 const Lang = imports.lang;
 const GmailNotification = Me.imports.GmailNotification.GmailNotification;
+const MailClientFocuser = new Me.imports.MailClientFocuser.MailClientFocuser();
 const Source = imports.ui.messageTray.Source;
 const console = Me.imports.console.console;
 const Gettext = imports.gettext.domain('gmail_notify');
 const _ = Gettext.gettext;
 const GmailConf = Me.imports.GmailConf;
+const Gio = imports.gi.Gio;
 
 const EXTENSION_NAME = "Gmail Message Tray";
 const DIALOG_ERROR = 'dialog-error';
@@ -157,7 +159,7 @@ const GmailMessageTray = new Lang.Class({
     },
     _displayUnreadMessages: function (content) {
         let newMessages = 0;
-        const messagesShown = Array.from(this.config.getMessagesShown());
+        const messagesShown = this.config.getMessagesShown();
         for (let msg of content) {
             const msgHash = this._simplehash(msg.link);
             const unseen = messagesShown.filter(h => h === msgHash).length === 0;
@@ -194,32 +196,15 @@ const GmailMessageTray = new Lang.Class({
         if (link === '' || link === undefined) {
             link = 'https://www.gmail.com';
         }
-        try {
-            Util.trySpawnCommandLine("xdg-open " + link);
-        } catch (err) {
-            this._showXdgError(err);
-        }
+        const defaultBrowser = Gio.app_info_get_default_for_uri_scheme("http").get_executable();
+        Util.trySpawnCommandLine(defaultBrowser + " " + link);
     },
     _openEmail: function (link) {
         if (this.config.getReader() === 0) {
             this._openBrowser(link);
         } else {
-            try {
-                Util.trySpawnCommandLine("xdg-email");
-            } catch (err) {
-                this._showXdgError(err);
-            }
+            MailClientFocuser.open();
         }
-    },
-    _showXdgError: function (err) {
-        console.error(err);
-        const content = {
-            from: _('Please install xdg-utils'),
-            date: new Date(),
-            subject: EXTENSION_NAME
-        };
-        this._createNotification(content, DIALOG_ERROR, true, true, () => {
-        });
     }
 });
 
diff --git a/MailClientFocuser.js b/MailClientFocuser.js
new file mode 100644
index 0000000..7e00540
--- /dev/null
+++ b/MailClientFocuser.js
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2017 Gmail Message Tray contributors
+ *
+ * Gmail Message Tray Extension is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * Gmail Message Tray Extension is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with Gnome Documents; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Authors:
+ * Shuming Chan <shuming0207@gmail.com>
+ *
+ */
+"use strict";
+const Lang = imports.lang;
+const screen = global.screen;
+const Meta = imports.gi.Meta;
+const Main = imports.ui.main;
+const Gio = imports.gi.Gio;
+const Util = imports.misc.util;
+
+const MailClientFocuser = new Lang.Class({
+    Name: 'MailClientFocuser',
+    _init: function () {
+    },
+    open: function () {
+        const defaultMailClient = Gio.app_info_get_default_for_uri_scheme("mailto").get_executable();
+        if(!this._trySwitchToExistingMailClient(defaultMailClient)){
+            this._openNewMailClient(defaultMailClient);
+        }
+    },
+    _openNewMailClient: function (mailClient) {
+        Util.trySpawnCommandLine(mailClient);
+    },
+    _trySwitchToExistingMailClient: function (mailClient) {
+        for (let i = 0; i < screen.n_workspaces; i++) {
+            const workspace = screen.get_workspace_by_index(i);
+            if (this._trySwitchToProgram(workspace, mailClient)) {
+                return true;
+            }
+        }
+        return false;
+    },
+    _trySwitchToProgram: function(workspace, program){
+        const display = screen.get_display();
+        const windows = display.get_tab_list(Meta.TabList.NORMAL, workspace);
+        for (let i = 0; i < windows.length; i++) {
+            const class_instance = windows[i].get_wm_class_instance();
+            if (class_instance === program) {
+                Main.activateWindow(windows[i]);
+                return true;
+            }
+        }
+        return false;
+    }
+});
diff --git a/extension.js b/extension.js
index 28737e1..f06b13c 100644
--- a/extension.js
+++ b/extension.js
@@ -31,7 +31,7 @@ const GmailMessageTray = Me.imports.GmailMessageTray.GmailMessageTray;
 const Mainloop = imports.mainloop;
 const console = Me.imports.console.console;
 
-const _version = "5";
+const _version = Me.metadata['version'];
 
 let extension;
 let Soup, sSes, Gio, Goa;
diff --git a/metadata.json b/metadata.json
index 43e367f..71edf66 100644
--- a/metadata.json
+++ b/metadata.json
@@ -7,5 +7,5 @@
   ],
   "url": "https://github.com/shumingch/GmailMessageTray",
   "uuid": "GmailMessageTray@shuming0207.gmail.com",
-  "version": 5
+  "version": 6
 }
\ No newline at end of file