[gnome-builder] greeter: propagate selection status to perspective

[Christian Hergert <chergert src gnome org>]

commit d9df81550eaa98c82e71b3827e53630e5228af34
Author: Christian Hergert <chergert redhat com>
Date:   Fri Nov 17 21:23:07 2017 -0800

    greeter: propagate selection status to perspective
    
    This allows the perspective to update the action bar when the
    selection changes in various sections.

 src/libide/greeter/ide-greeter-perspective.c  |   45 +++++++++++++++++
 src/libide/greeter/ide-greeter-section.c      |    7 +++
 src/plugins/newcomers/gbp-newcomers-section.c |   32 ++++++++++++
 src/plugins/recent/gbp-recent-section.c       |   64 +++++++++++++++++++++++++
 4 files changed, 148 insertions(+), 0 deletions(-)
---
diff --git a/src/libide/greeter/ide-greeter-perspective.c b/src/libide/greeter/ide-greeter-perspective.c
index bfa763b..08d0763 100644
--- a/src/libide/greeter/ide-greeter-perspective.c
+++ b/src/libide/greeter/ide-greeter-perspective.c
@@ -901,6 +901,45 @@ ide_greeter_perspective_project_activated (IdeGreeterPerspective *self,
 }
 
 static void
+ide_greeter_perspective_notify_has_selection_cb (PeasExtensionSet *set,
+                                                 PeasPluginInfo   *plugin_info,
+                                                 PeasExtension    *exten,
+                                                 gpointer          user_data)
+{
+  IdeGreeterSection *section = (IdeGreeterSection *)exten;
+  gboolean *has_selection = user_data;
+
+  g_return_if_fail (PEAS_IS_EXTENSION_SET (set));
+  g_return_if_fail (plugin_info != NULL);
+  g_return_if_fail (has_selection != NULL);
+  g_return_if_fail (IDE_IS_GREETER_SECTION (section));
+
+  if (*has_selection)
+    return;
+
+  g_object_get (section, "has-selection", has_selection, NULL);
+}
+
+static void
+ide_greeter_perspective_notify_has_selection (IdeGreeterPerspective *self,
+                                              GParamSpec            *pspec,
+                                              IdeGreeterSection     *section)
+{
+  gboolean has_selection = FALSE;
+
+  g_assert (IDE_IS_GREETER_PERSPECTIVE (self));
+  g_assert (IDE_IS_GREETER_SECTION (section));
+
+  peas_extension_set_foreach (self->sections,
+                              ide_greeter_perspective_notify_has_selection_cb,
+                              &has_selection);
+
+  dzl_gtk_widget_action_set (GTK_WIDGET (self), "greeter", "delete-selected-rows",
+                             "enabled", has_selection,
+                             NULL);
+}
+
+static void
 ide_greeter_perspective_section_added (PeasExtensionSet *set,
                                        PeasPluginInfo   *plugin_info,
                                        PeasExtension    *exten,
@@ -922,6 +961,12 @@ ide_greeter_perspective_section_added (PeasExtensionSet *set,
     g_object_ref_sink (section);
 
   g_signal_connect_object (section,
+                           "notify::has-selection",
+                           G_CALLBACK (ide_greeter_perspective_notify_has_selection),
+                           self,
+                           G_CONNECT_SWAPPED);
+
+  g_signal_connect_object (section,
                            "project-activated",
                            G_CALLBACK (ide_greeter_perspective_project_activated),
                            self,
diff --git a/src/libide/greeter/ide-greeter-section.c b/src/libide/greeter/ide-greeter-section.c
index dcd013e..3168c05 100644
--- a/src/libide/greeter/ide-greeter-section.c
+++ b/src/libide/greeter/ide-greeter-section.c
@@ -32,6 +32,13 @@ static guint signals [N_SIGNALS];
 static void
 ide_greeter_section_default_init (IdeGreeterSectionInterface *iface)
 {
+  g_object_interface_install_property (iface,
+                                       g_param_spec_boolean ("has-selection",
+                                                             "Has Selection",
+                                                             "If the greeter has a selection",
+                                                             FALSE,
+                                                             G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+
   /**
    * IdeGreeterSection::project-activated:
    *
diff --git a/src/plugins/newcomers/gbp-newcomers-section.c b/src/plugins/newcomers/gbp-newcomers-section.c
index d55eb90..ea14089 100644
--- a/src/plugins/newcomers/gbp-newcomers-section.c
+++ b/src/plugins/newcomers/gbp-newcomers-section.c
@@ -29,6 +29,12 @@ struct _GbpNewcomersSection
   GtkFlowBox *flowbox;
 };
 
+enum {
+  PROP_0,
+  PROP_HAS_SELECTION,
+  N_PROPS
+};
+
 static void gbp_newcomers_section_child_activated (GbpNewcomersSection *self,
                                                    GbpNewcomersProject *project,
                                                    GtkFlowBox          *flowbox);
@@ -175,9 +181,35 @@ gbp_newcomers_section_child_activated (GbpNewcomersSection *self,
 }
 
 static void
+gbp_newcomers_section_get_property (GObject    *object,
+                                    guint       prop_id,
+                                    GValue     *value,
+                                    GParamSpec *pspec)
+{
+  switch (prop_id)
+    {
+    case PROP_HAS_SELECTION:
+      g_value_set_boolean (value, FALSE);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
 gbp_newcomers_section_class_init (GbpNewcomersSectionClass *klass)
 {
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->get_property = gbp_newcomers_section_get_property;
+
+  g_object_class_install_property (object_class,
+                                   PROP_HAS_SELECTION,
+                                   g_param_spec_boolean ("has-selection", NULL, NULL,
+                                                         FALSE,
+                                                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
 
   gtk_widget_class_set_css_name (widget_class, "newcomers");
   gtk_widget_class_set_template_from_resource (widget_class,
diff --git a/src/plugins/recent/gbp-recent-section.c b/src/plugins/recent/gbp-recent-section.c
index 23f45bd..2d96de9 100644
--- a/src/plugins/recent/gbp-recent-section.c
+++ b/src/plugins/recent/gbp-recent-section.c
@@ -32,6 +32,39 @@ struct _GbpRecentSection
   guint       selection_mode : 1;
 };
 
+enum {
+  PROP_0,
+  PROP_HAS_SELECTION,
+  N_PROPS
+};
+
+static GParamSpec *properties [N_PROPS];
+
+static void
+gbp_recent_section_get_has_selection_cb (GtkWidget *widget,
+                                         gpointer   user_data)
+{
+  gboolean *has_selection = user_data;
+  gboolean selected = FALSE;
+
+  g_object_get (widget, "selected", &selected, NULL);
+  *has_selection |= selected;
+}
+
+static gboolean
+gbp_recent_section_get_has_selection (GbpRecentSection *self)
+{
+  gboolean has_selection = FALSE;
+
+  g_assert (GBP_IS_RECENT_SECTION (self));
+
+  gtk_container_foreach (GTK_CONTAINER (self->listbox),
+                         gbp_recent_section_get_has_selection_cb,
+                         &has_selection);
+
+  return has_selection;
+}
+
 static gint
 gbp_recent_section_get_priority (IdeGreeterSection *section)
 {
@@ -158,6 +191,8 @@ gbp_recent_section_set_selection_mode (IdeGreeterSection *section,
                          &selection_mode);
 
   self->selection_mode = selection_mode;
+
+  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_HAS_SELECTION]);
 }
 
 static void
@@ -188,6 +223,8 @@ gbp_recent_section_row_activated (GbpRecentSection    *self,
 
       g_object_get (row, "selected", &selected, NULL);
       g_object_set (row, "selected", !selected, NULL);
+
+      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_HAS_SELECTION]);
     }
   else
     {
@@ -231,12 +268,39 @@ gbp_recent_section_constructed (GObject *object)
 }
 
 static void
+gbp_recent_section_get_property (GObject    *object,
+                                 guint       prop_id,
+                                 GValue     *value,
+                                 GParamSpec *pspec)
+{
+  GbpRecentSection *self = GBP_RECENT_SECTION (object);
+
+  switch (prop_id)
+    {
+    case PROP_HAS_SELECTION:
+      g_value_set_boolean (value, gbp_recent_section_get_has_selection (self));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
 gbp_recent_section_class_init (GbpRecentSectionClass *klass)
 {
   GObjectClass *object_class = G_OBJECT_CLASS (klass);
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
   object_class->constructed = gbp_recent_section_constructed;
+  object_class->get_property = gbp_recent_section_get_property;
+
+  properties [PROP_HAS_SELECTION] =
+    g_param_spec_boolean ("has-selection", NULL, NULL,
+                          FALSE,
+                          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  g_object_class_install_properties (object_class, N_PROPS, properties);
 
   gtk_widget_class_set_css_name (widget_class, "recent");
   gtk_widget_class_set_template_from_resource (widget_class,