Allow brief notifications

This change allows certain notifications to be displayed only briefly. The new DConf key brief-notification-duration is the number of seconds for which brief notifications should be displayed.

At the moment the only brief notifications are "Message sent", "Conversation archived" and "Message archived".

Closes #602

desktop/org.gnome.Geary.gschema.xml

@@ -128,6 +128,13 @@
         email. Set to zero or less to disable.</description>
     </key>
 
+    <key name="brief-notification-duration" type="i">
+        <default>5</default>
+        <summary>Brief notification display time</summary>
+        <description>The length of time in seconds for which brief notifications should
+        be displayed.</description>
+    </key>
+
     <key name="migrated-config" type="b">
         <default>false</default>
         <summary>Whether we migrated the old settings</summary>

src/client/accounts/accounts-editor-list-pane.vala

@@ -243,8 +243,12 @@ internal class Accounts.EditorListPane : Gtk.Grid, EditorPane, CommandPane {
 
     private void on_execute(Application.Command command) {
         if (command.executed_label != null) {
+            int notification_time =
+                command.executed_notification_brief ?
+                    editor.application.config.brief_notification_duration : 0;
             Components.InAppNotification ian =
-                new Components.InAppNotification(command.executed_label);
+                new Components.InAppNotification(
+                    command.executed_label, notification_time);
             ian.set_button(_("Undo"), Action.Edit.prefix(Action.Edit.UNDO));
             this.editor.add_notification(ian);
         }

src/client/application/application-command.vala

@@ -71,6 +71,14 @@ public abstract class Application.Command : GLib.Object {
      */
     public string? executed_label { get; protected set; default = null; }
 
+    /**
+     * True if executed_label should be displayed only briefly to the user.
+     * Set this to true for very frequent notifications.
+     */
+    public bool executed_notification_brief {
+        get; protected set; default = false;
+    }
+
     /**
      * A human-readable label describing the result of calling {@link undo}.
      *

src/client/application/application-configuration.vala

@@ -14,6 +14,7 @@ public class Application.Configuration : Geary.BaseObject {
 
     public const string ASK_OPEN_ATTACHMENT_KEY = "ask-open-attachment";
     public const string AUTOSELECT_KEY = "autoselect";
+    public const string BRIEF_NOTIFICATION_DURATION = "brief-notification-duration";
     public const string COMPOSER_WINDOW_SIZE_KEY = "composer-window-size";
     public const string COMPOSE_AS_HTML_KEY = "compose-as-html";
     public const string CONVERSATION_VIEWER_ZOOM_KEY = "conversation-viewer-zoom";
@@ -154,6 +155,10 @@ public class Application.Configuration : Geary.BaseObject {
         get { return settings.get_int(UNDO_SEND_DELAY); }
     }
 
+    /** The number of seconds for which brief notifications should be displayed. */
+    public int brief_notification_duration {
+        get { return settings.get_int(BRIEF_NOTIFICATION_DURATION); }
+    }
 
     // Creates a configuration object.
     public Configuration(string schema_id) {

src/client/application/application-controller.vala

@@ -1558,7 +1558,9 @@ internal class Application.Controller : Geary.BaseObject {
             "Email sent to %s"
         ).printf(Util.Email.to_short_recipient_display(sent));
         Components.InAppNotification notification =
-            new Components.InAppNotification(message);
+            new Components.InAppNotification(
+                message, application.config.brief_notification_duration
+                );
         foreach (MainWindow window in this.application.get_main_windows()) {
             window.add_notification(notification);
         }
@@ -2324,6 +2326,7 @@ private class Application.ArchiveEmailCommand : RevokableCommand {
         base(source, conversations, messages);
         this.source = source;
         this.executed_label = executed_label;
+        this.executed_notification_brief = true;
         this.undone_label = undone_label;
     }
 

src/client/application/application-main-window.vala

@@ -2032,8 +2032,11 @@ public class Application.MainWindow :
     private void on_command_redo(Command command) {
         update_command_actions();
         if (command.executed_label != null) {
+            int notification_time =
+                command.executed_notification_brief ?
+                    application.config.brief_notification_duration : 0;
             Components.InAppNotification ian =
-                new Components.InAppNotification(command.executed_label);
+                new Components.InAppNotification(command.executed_label, notification_time);
             ian.set_button(_("Undo"), Action.Edit.prefix(Action.Edit.UNDO));
             add_notification(ian);
         }

src/client/components/components-in-app-notification.vala

@@ -26,7 +26,9 @@ public class Components.InAppNotification : Gtk.Revealer {
      * @param message The message that should be displayed.
      * @param keepalive The amount of seconds that the notification should stay visible.
      */
-    public InAppNotification(string message, uint keepalive = DEFAULT_KEEPALIVE) {
+    public InAppNotification(string message, uint keepalive = 0) {
+        if (keepalive == 0)
+            keepalive = DEFAULT_KEEPALIVE;
         this.transition_type = Gtk.RevealerTransitionType.SLIDE_DOWN;
         this.message_label.label = message;