[seahorse] ItemProperties: Add copy button

[Niels De Graef <nielsdg src gnome org>]

commit 79c452a15a222cfaabdfd332a88ec2b0e522093b
Author: Elias Entrup <elias-git flump de>
Date:   Tue Sep 18 15:54:23 2018 +0200

    ItemProperties: Add copy button
    
    Add a button that copies the password to the clipboard.
    
    https://gitlab.gnome.org/GNOME/seahorse/issues/198

 gkr/gkr-item-properties.vala        | 16 +++++++++++++++-
 gkr/seahorse-gkr-item-properties.ui | 17 ++++++++++++++++-
 2 files changed, 31 insertions(+), 2 deletions(-)
---
diff --git a/gkr/gkr-item-properties.vala b/gkr/gkr-item-properties.vala
index a805edaf..7b14f286 100644
--- a/gkr/gkr-item-properties.vala
+++ b/gkr/gkr-item-properties.vala
@@ -79,7 +79,7 @@ public class Seahorse.Gkr.ItemProperties : Gtk.Dialog {
 
         // Create the password entry
         this.password_entry = new PasswordEntry();
-        this.password_box_area.add(this.password_entry);
+        this.password_box_area.pack_start(this.password_entry, true, true, 0);
         fetch_password();
 
         // Sensitivity of the password entry
@@ -233,4 +233,18 @@ public class Seahorse.Gkr.ItemProperties : Gtk.Dialog {
             Util.show_error (this, _("Couldn’t set description."), err.message);
         }
     }
+
+    [GtkCallback]
+    private void on_copy_button_clicked() {
+        var secret = this.item.get_secret();
+        if (secret == null)
+            return;
+
+        unowned string? password = secret.get_text();
+        if (password == null)
+            return;
+
+        var clipboard = Gtk.Clipboard.get_default(this.get_display());
+        clipboard.set_text(password, -1);
+    }
 }
diff --git a/gkr/seahorse-gkr-item-properties.ui b/gkr/seahorse-gkr-item-properties.ui
index c40f1f78..d847bcc7 100644
--- a/gkr/seahorse-gkr-item-properties.ui
+++ b/gkr/seahorse-gkr-item-properties.ui
@@ -82,8 +82,23 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <child>
-                  <placeholder/>
+                  <object class="GtkButton">
+                    <property name="label" translatable="yes">Copy</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="receives_default">True</property>
+                    <signal name="clicked" handler="on_copy_button_clicked" swapped="no"/>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">True</property>
+                    <property name="pack_type">end</property>
+                    <property name="position">1</property>
+                  </packing>
                 </child>
+                <style>
+                  <class name="linked"/>
+                </style>
               </object>
               <packing>
                 <property name="left_attach">1</property>