[dconf-editor] Add "unavailable" icon for erased keys.

[Arnaud Bonatti <arnaudb src gnome org>]

commit 1edb0dce738528cd129975fd01fb1b222f181407
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Mon Dec 4 17:31:31 2017 +0100

    Add "unavailable" icon for erased keys.

 editor/dconf-editor.css     |   13 ++++++++-----
 editor/registry-search.vala |   10 ++++++++--
 editor/registry-view.vala   |   10 ++++++++--
 3 files changed, 24 insertions(+), 9 deletions(-)
---
diff --git a/editor/dconf-editor.css b/editor/dconf-editor.css
index 62c7ea3..8897f2e 100644
--- a/editor/dconf-editor.css
+++ b/editor/dconf-editor.css
@@ -142,12 +142,15 @@
 
 /* pending change icon */
 
-                                                .keys-list          > row > .key         { 
transition:background-position 0.3s; }
-                                                .keys-list          > row > .key.delayed { 
background-image:-gtk-icontheme("document-open-recent-symbolic"); background-repeat:no-repeat; }
-                                                .keys-list          > row > .key.delayed.erase { 
background-image:-gtk-icontheme("user-trash-symbolic"); }
+                                                .keys-list          > row > .key         { 
transition:background-position 0.3s,
+                                                                                                      
background-size     0.3s;
+                                                                                           
background-repeat:no-repeat;
+                                                                                           
background-size:1.5rem; }
+                          .small-keys-list-rows .keys-list          > row > .key         { 
background-size:1rem; }
 
-                                                .keys-list          > row > .key.delayed { 
background-size:1.5rem; transition:background-size 0.3s; }
-                          .small-keys-list-rows .keys-list          > row > .key.delayed { 
background-size:1rem; }
+                                                .keys-list          > row > .key.delayed       { 
background-image:-gtk-icontheme("document-open-recent-symbolic"); }
+                                                .keys-list          > row > .key.delayed.erase { 
background-image:-gtk-icontheme("user-trash-symbolic"); }
+                                                .keys-list          > row > .key.erase         { 
background-image:-gtk-icontheme("action-unavailable-symbolic"); }
 
                                                 .keys-list:dir(ltr) > row > .key         { 
background-position:            0.75rem  center; }
                                                 .keys-list:dir(rtl) > row > .key         { 
background-position:calc(100% - 0.75rem) center; }
diff --git a/editor/registry-search.vala b/editor/registry-search.vala
index 87ad7db..2a64c1a 100644
--- a/editor/registry-search.vala
+++ b/editor/registry-search.vala
@@ -202,9 +202,9 @@ class RegistrySearch : Grid, PathElement, BrowsableView
 
     private void set_delayed_icon (ClickableListBoxRow row, Key key)
     {
+        StyleContext context = row.get_style_context ();
         if (key.planned_change)
         {
-            StyleContext context = row.get_style_context ();
             context.add_class ("delayed");
             if (key is DConfKey)
             {
@@ -215,7 +215,13 @@ class RegistrySearch : Grid, PathElement, BrowsableView
             }
         }
         else
-            row.get_style_context ().remove_class ("delayed");
+        {
+            context.remove_class ("delayed");
+            if (key is DConfKey && ((DConfKey) key).is_ghost)
+                context.add_class ("erase");
+            else
+                context.remove_class ("erase");
+        }
     }
 
     private bool on_button_pressed (Widget widget, Gdk.EventButton event)
diff --git a/editor/registry-view.vala b/editor/registry-view.vala
index 7496e61..dabb988 100644
--- a/editor/registry-view.vala
+++ b/editor/registry-view.vala
@@ -191,9 +191,9 @@ class RegistryView : Grid, PathElement, BrowsableView
 
     private void set_delayed_icon (ClickableListBoxRow row, Key key)
     {
+        StyleContext context = row.get_style_context ();
         if (key.planned_change)
         {
-            StyleContext context = row.get_style_context ();
             context.add_class ("delayed");
             if (key is DConfKey)
             {
@@ -204,7 +204,13 @@ class RegistryView : Grid, PathElement, BrowsableView
             }
         }
         else
-            row.get_style_context ().remove_class ("delayed");
+        {
+            context.remove_class ("delayed");
+            if (key is DConfKey && ((DConfKey) key).is_ghost)
+                context.add_class ("erase");
+            else
+                context.remove_class ("erase");
+        }
     }
 
     private bool on_button_pressed (Widget widget, Gdk.EventButton event)