From: Florian Müllner <fmuellner@gnome.org>
Date: Sun, 26 Feb 2017 21:23:11 +0000 (+0100)
Subject: messageList: Make canClear public and notify on changes
X-Git-Tag: archive/raspbian/50.5-1+rpi1~1^2~1013^2^2~502
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/%22/%22http:/www.example.com/cgi/%22?a=commitdiff_plain;h=239b67eff62c46f079502f33523a0eafccd2dfc9;p=gnome-shell.git

messageList: Make canClear public and notify on changes

The latest mockups contain a button to clear all sections at once.
As some elements cannot be cleared, we need to provide that information
to avoid offering an action that has no effect.

https://bugzilla.gnome.org/show_bug.cgi?id=775763
---

diff --git a/js/ui/messageList.js b/js/ui/messageList.js
index 325f5a370..9dde30941 100644
--- a/js/ui/messageList.js
+++ b/js/ui/messageList.js
@@ -563,6 +563,7 @@ const MessageListSection = new Lang.Class({
         this._messages = new Map();
         this._date = new Date();
         this.empty = true;
+        this.canClear = false;
         this._sync();
     },
 
@@ -719,7 +720,14 @@ const MessageListSection = new Lang.Class({
         if (changed)
             this.emit('empty-changed');
 
-        this._closeButton.visible = this._canClear();
+        let canClear = this._canClear();
+        changed = this.canClear !== canClear;
+        this.canClear = canClear;
+
+        if (changed)
+            this.emit('can-clear-changed');
+
+        this._closeButton.visible = this.canClear;
         this.actor.visible = this.allowed && this._shouldShow();
     }
 });