[gnome-builder] glade: add undo/redo support

[Christian Hergert <chergert src gnome org>]

commit 28fececffc0a68a0011e07fbaacaf1353464743c
Author: Christian Hergert <chergert redhat com>
Date:   Sun Oct 21 22:37:21 2018 -0700

    glade: add undo/redo support
    
    This adds actions for undo/redo and wires up shortcuts to them. It also
    adds menu entries for the document menu.

 src/plugins/glade/gbp-glade-view-actions.c   | 59 ++++++++++++++++++++++++++++
 src/plugins/glade/gbp-glade-view-shortcuts.c | 24 +++++++++++
 src/plugins/glade/gtk/menus.ui               | 12 ++++++
 3 files changed, 95 insertions(+)
---
diff --git a/src/plugins/glade/gbp-glade-view-actions.c b/src/plugins/glade/gbp-glade-view-actions.c
index 42170e368..33fbb725a 100644
--- a/src/plugins/glade/gbp-glade-view-actions.c
+++ b/src/plugins/glade/gbp-glade-view-actions.c
@@ -109,12 +109,64 @@ gbp_glade_view_action_pointer_mode (GSimpleAction *action,
     glade_project_set_pointer_mode (project, value->value);
 }
 
+static void
+gbp_glade_view_action_undo (GSimpleAction *action,
+                            GVariant      *param,
+                            gpointer       user_data)
+{
+  GbpGladeView *self = user_data;
+
+  g_assert (G_IS_SIMPLE_ACTION (action));
+  g_assert (GBP_IS_GLADE_VIEW (self));
+
+  glade_project_undo (self->project);
+}
+
+static void
+gbp_glade_view_action_redo (GSimpleAction *action,
+                            GVariant      *param,
+                            gpointer       user_data)
+{
+  GbpGladeView *self = user_data;
+
+  g_assert (G_IS_SIMPLE_ACTION (action));
+  g_assert (GBP_IS_GLADE_VIEW (self));
+
+  glade_project_redo (self->project);
+}
+
 static GActionEntry actions[] = {
+  { "redo", gbp_glade_view_action_redo },
+  { "undo", gbp_glade_view_action_undo },
   { "save", gbp_glade_view_action_save },
   { "preview", gbp_glade_view_action_preview },
   { "pointer-mode", gbp_glade_view_action_pointer_mode, "s" },
 };
 
+static void
+gbp_glade_view_update_actions_cb (GbpGladeView *self,
+                                  GladeCommand *command,
+                                  gboolean      execute,
+                                  GladeProject *project)
+{
+  GladeCommand *redo;
+  GladeCommand *undo;
+
+  g_assert (GBP_IS_GLADE_VIEW (self));
+  g_assert (!command || GLADE_IS_COMMAND (command));
+  g_assert (GLADE_IS_PROJECT (project));
+
+  redo = glade_project_next_redo_item (project);
+  undo = glade_project_next_undo_item (project);
+
+  dzl_gtk_widget_action_set (GTK_WIDGET (self), "glade-view", "undo",
+                             "enabled", undo != NULL,
+                             NULL);
+  dzl_gtk_widget_action_set (GTK_WIDGET (self), "glade-view", "redo",
+                             "enabled", redo != NULL,
+                             NULL);
+}
+
 void
 _gbp_glade_view_init_actions (GbpGladeView *self)
 {
@@ -130,4 +182,11 @@ _gbp_glade_view_init_actions (GbpGladeView *self)
   gtk_widget_insert_action_group (GTK_WIDGET (self),
                                   "glade-view",
                                   G_ACTION_GROUP (group));
+
+  g_signal_connect_object (self->project,
+                           "changed",
+                           G_CALLBACK (gbp_glade_view_update_actions_cb),
+                           self,
+                           G_CONNECT_SWAPPED);
+  gbp_glade_view_update_actions_cb (self, NULL, FALSE, self->project);
 }
diff --git a/src/plugins/glade/gbp-glade-view-shortcuts.c b/src/plugins/glade/gbp-glade-view-shortcuts.c
index 19489c4be..a383282fc 100644
--- a/src/plugins/glade/gbp-glade-view-shortcuts.c
+++ b/src/plugins/glade/gbp-glade-view-shortcuts.c
@@ -42,6 +42,18 @@ static DzlShortcutEntry glade_view_shortcuts[] = {
     NC_("shortcut window", "Glade shortcuts"),
     NC_("shortcut window", "Designer"),
     NC_("shortcut window", "Preview the interface design") },
+
+  { "org.gnome.builder.glade-view.undo",
+    0, NULL,
+    NC_("shortcut window", "Glade shortcuts"),
+    NC_("shortcut window", "Designer"),
+    NC_("shortcut window", "Undo the last command") },
+
+  { "org.gnome.builder.glade-view.redo",
+    0, NULL,
+    NC_("shortcut window", "Glade shortcuts"),
+    NC_("shortcut window", "Designer"),
+    NC_("shortcut window", "Redo the next command") },
 };
 
 void
@@ -65,6 +77,18 @@ _gbp_glade_view_init_shortcuts (GtkWidget *widget)
                                               DZL_SHORTCUT_PHASE_BUBBLE,
                                               I_("glade-view.preview"));
 
+  dzl_shortcut_controller_add_command_action (controller,
+                                              I_("org.gnome.builder.glade-view.undo"),
+                                              "<Control>z",
+                                              DZL_SHORTCUT_PHASE_BUBBLE,
+                                              I_("glade-view.undo"));
+
+  dzl_shortcut_controller_add_command_action (controller,
+                                              I_("org.gnome.builder.glade-view.redo"),
+                                              "<Control><Shift>z",
+                                              DZL_SHORTCUT_PHASE_BUBBLE,
+                                              I_("glade-view.redo"));
+
   dzl_shortcut_manager_add_shortcut_entries (NULL,
                                              glade_view_shortcuts,
                                              G_N_ELEMENTS (glade_view_shortcuts),
diff --git a/src/plugins/glade/gtk/menus.ui b/src/plugins/glade/gtk/menus.ui
index 9fbac118d..29a5f0587 100644
--- a/src/plugins/glade/gtk/menus.ui
+++ b/src/plugins/glade/gtk/menus.ui
@@ -16,6 +16,18 @@
         <attribute name="accel">&lt;control&gt;&lt;alt&gt;p</attribute>
       </item>
     </section>
+    <section id="glade-undo-section">
+      <item>
+        <attribute name="action">glade-view.undo</attribute>
+        <attribute name="label" translatable="yes">Undo</attribute>
+        <attribute name="accel">&lt;control&gt;z</attribute>
+      </item>
+      <item>
+        <attribute name="action">glade-view.redo</attribute>
+        <attribute name="label" translatable="yes">Redo</attribute>
+        <attribute name="accel">&lt;control&gt;&lt;shift&gt;z</attribute>
+      </item>
+    </section>
   </menu>
   <menu id="gb-project-tree-popup-menu">
     <section id="gb-project-tree-open-section">