libsysprof-ui: wire up can-save propagation

src/libsysprof-ui/sysprof-display.c

@@ -52,6 +52,7 @@ G_DEFINE_TYPE_WITH_PRIVATE (SysprofDisplay, sysprof_display, GTK_TYPE_BIN)
 
 enum {
   PROP_0,
+  PROP_CAN_SAVE,
   PROP_RECORDING,
   PROP_TITLE,
   N_PROPS
@@ -124,6 +125,7 @@ sysprof_display_profiler_stopped_cb (SysprofDisplay  *self,
     }
 
 notify:
+  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_CAN_SAVE]);
   g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_RECORDING]);
   g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_TITLE]);
 }
@@ -274,6 +276,10 @@ sysprof_display_get_property (GObject    *object,
 
   switch (prop_id)
     {
+    case PROP_CAN_SAVE:
+      g_value_set_boolean (value, sysprof_display_get_can_save (self));
+      break;
+
     case PROP_RECORDING:
       g_value_set_boolean (value, sysprof_display_get_is_recording (self));
       break;
@@ -312,6 +318,13 @@ sysprof_display_class_init (SysprofDisplayClass *klass)
 
   widget_class->parent_set = sysprof_display_parent_set;
 
+  properties [PROP_CAN_SAVE] =
+    g_param_spec_boolean ("can-save",
+                          "Can Save",
+                          "If the display can save a recording",
+                          FALSE,
+                          (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+
   properties [PROP_RECORDING] =
     g_param_spec_boolean ("recording",
                           "Recording",
@@ -536,3 +549,13 @@ sysprof_display_save (SysprofDisplay *self)
 
   gtk_native_dialog_destroy (GTK_NATIVE_DIALOG (native));
 }
+
+gboolean
+sysprof_display_get_can_save (SysprofDisplay *self)
+{
+  SysprofDisplayPrivate *priv = sysprof_display_get_instance_private (self);
+
+  g_return_val_if_fail (SYSPROF_IS_DISPLAY (self), FALSE);
+
+  return sysprof_capture_view_get_reader (priv->capture_view) != NULL;
+}

src/libsysprof-ui/sysprof-display.h

@@ -53,5 +53,7 @@ void             sysprof_display_open         (SysprofDisplay *self,
                                                GFile          *file);
 SYSPROF_AVAILABLE_IN_ALL
 void             sysprof_display_save         (SysprofDisplay *self);
+SYSPROF_AVAILABLE_IN_ALL
+gboolean         sysprof_display_get_can_save (SysprofDisplay *self);
 
 G_END_DECLS

src/sysprof/sysprof-window.c

@@ -22,6 +22,7 @@
 
 #include "config.h"
 
+#include <dazzle.h>
 #include <glib/gi18n.h>
 #include <sysprof-ui.h>
 
@@ -30,6 +31,9 @@
 struct _SysprofWindow
 {
   GtkApplicationWindow  parent_instance;
+
+  DzlBindingGroup      *display_bindings;
+
   SysprofNotebook      *notebook;
   GtkMenuButton        *menu_button;
 };
@@ -117,11 +121,40 @@ save_capture_cb (GSimpleAction *action,
   sysprof_notebook_save (self->notebook);
 }
 
+static void
+sysprof_window_switch_page_cb (SysprofWindow   *self,
+                               GtkWidget       *widget,
+                               guint            page_num,
+                               SysprofNotebook *notebook)
+{
+  SysprofDisplay *current;
+
+  g_assert (SYSPROF_IS_WINDOW (self));
+  g_assert (SYSPROF_IS_NOTEBOOK (notebook));
+
+  current = sysprof_notebook_get_current (notebook);
+  dzl_binding_group_set_source (self->display_bindings, current);
+}
+
+static void
+sysprof_window_finalize (GObject *object)
+{
+  SysprofWindow *self = SYSPROF_WINDOW (object);
+
+  dzl_binding_group_set_source (self->display_bindings, NULL);
+  g_clear_object (&self->display_bindings);
+
+  G_OBJECT_CLASS (sysprof_window_parent_class)->finalize (object);
+}
+
 static void
 sysprof_window_class_init (SysprofWindowClass *klass)
 {
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
+  object_class->finalize = sysprof_window_finalize;
+
   gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/sysprof/ui/sysprof-window.ui");
   gtk_widget_class_bind_template_child (widget_class, SysprofWindow, menu_button);
   gtk_widget_class_bind_template_child (widget_class, SysprofWindow, notebook);
@@ -134,6 +167,7 @@ sysprof_window_class_init (SysprofWindowClass *klass)
 static void
 sysprof_window_init (SysprofWindow *self)
 {
+  GAction *action;
   static GActionEntry actions[] = {
     { "close-tab", close_tab_cb },
     { "new-tab", new_tab_cb },
@@ -147,6 +181,20 @@ sysprof_window_init (SysprofWindow *self)
                                    actions,
                                    G_N_ELEMENTS (actions),
                                    self);
+  action = g_action_map_lookup_action (G_ACTION_MAP (self), "save-capture");
+
+  self->display_bindings = dzl_binding_group_new ();
+  dzl_binding_group_bind (self->display_bindings, "can-save", action, "enabled", G_BINDING_SYNC_CREATE);
+
+  g_signal_connect_object (self->notebook,
+                           "switch-page",
+                           G_CALLBACK (sysprof_window_switch_page_cb),
+                           self,
+                           G_CONNECT_SWAPPED | G_CONNECT_AFTER);
+
+  dzl_gtk_widget_action_set (GTK_WIDGET (self), "win", "save-capture",
+                             "enabled", FALSE,
+                             NULL);
 }
 
 void