[nautilus/wip/gbsneto/cleanups: 4/5] project: simplify focus chain

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 2a2b09cf9de0256301f5f3a46116c72525413a8a
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Wed Jul 29 18:07:24 2015 -0300

    project: simplify focus chain
    
    Nautilus classes add custom methods to grab the focus
    differently according to the class.
    
    The problem with this approach, however, is that we end
    up with more code coupling, since it's necessary to include
    more headers to use the custom grab methods.
    
    To fix that, make classes override GtkWidget::grab_focus
    method and remove the custom methods, so widgets can simply
    call gtk_widget_grab_focus.

 src/nautilus-query-editor.c |    2 +-
 src/nautilus-toolbar.c      |    8 +-------
 src/nautilus-view.c         |   11 +++++++++--
 src/nautilus-view.h         |    1 -
 src/nautilus-window-slot.c  |   23 ++++++++++++++++++++++-
 src/nautilus-window.c       |   24 ++++++++++--------------
 src/nautilus-window.h       |    1 -
 7 files changed, 43 insertions(+), 27 deletions(-)
---
diff --git a/src/nautilus-query-editor.c b/src/nautilus-query-editor.c
index 0e07bb2..ccdb55b 100644
--- a/src/nautilus-query-editor.c
+++ b/src/nautilus-query-editor.c
@@ -903,7 +903,7 @@ entry_key_press_event_cb (GtkWidget           *widget,
                          NautilusQueryEditor *editor)
 {
        if (event->keyval == GDK_KEY_Down) {
-               nautilus_window_grab_focus (NAUTILUS_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (widget))));
+               gtk_widget_grab_focus (gtk_widget_get_toplevel (GTK_WIDGET (widget)));
        }
        return FALSE;
 }
diff --git a/src/nautilus-toolbar.c b/src/nautilus-toolbar.c
index 5d67c83..3e33d28 100644
--- a/src/nautilus-toolbar.c
+++ b/src/nautilus-toolbar.c
@@ -426,13 +426,7 @@ static void
 view_menu_popover_closed (GtkPopover *popover,
                          NautilusToolbar *self)
 {
-       NautilusWindowSlot *slot;
-       NautilusView *view;
-
-       slot = nautilus_window_get_active_slot (self->priv->window);
-       view = nautilus_window_slot_get_current_view (slot);
-
-       nautilus_view_grab_focus (view);
+        gtk_widget_grab_focus (GTK_WIDGET (self->priv->window));
 }
 
 static gboolean
diff --git a/src/nautilus-view.c b/src/nautilus-view.c
index 964ce15..8f49e5b 100644
--- a/src/nautilus-view.c
+++ b/src/nautilus-view.c
@@ -2697,12 +2697,18 @@ slot_inactive (NautilusWindowSlot *slot,
        remove_update_context_menus_timeout_callback (view);
 }
 
-void
-nautilus_view_grab_focus (NautilusView *view)
+static void
+nautilus_view_grab_focus (GtkWidget *widget)
 {
        /* focus the child of the scrolled window if it exists */
+        NautilusView *view;
        GtkWidget *child;
+
+        view = NAUTILUS_VIEW (widget);
        child = gtk_bin_get_child (GTK_BIN (view->details->scrolled_window));
+
+        GTK_WIDGET_CLASS (nautilus_view_parent_class)->grab_focus (widget);
+
        if (child) {
                gtk_widget_grab_focus (GTK_WIDGET (child));
        }
@@ -7744,6 +7750,7 @@ nautilus_view_class_init (NautilusViewClass *klass)
        widget_class->destroy = nautilus_view_destroy;
        widget_class->scroll_event = nautilus_view_scroll_event;
        widget_class->parent_set = nautilus_view_parent_set;
+        widget_class->grab_focus = nautilus_view_grab_focus;
 
        g_type_class_add_private (klass, sizeof (NautilusViewDetails));
 
diff --git a/src/nautilus-view.h b/src/nautilus-view.h
index e8557a5..c89bec3 100644
--- a/src/nautilus-view.h
+++ b/src/nautilus-view.h
@@ -380,7 +380,6 @@ gboolean          nautilus_view_can_zoom_out               (NautilusView      *v
 void              nautilus_view_pop_up_pathbar_context_menu (NautilusView    *view,
                                                             GdkEventButton  *event,
                                                             const char      *location);
-void              nautilus_view_grab_focus                 (NautilusView      *view);
 void              nautilus_view_update_menus               (NautilusView      *view);
 
 void              nautilus_view_update_context_menus       (NautilusView      *view);
diff --git a/src/nautilus-window-slot.c b/src/nautilus-window-slot.c
index 7f1208e..166fbac 100644
--- a/src/nautilus-window-slot.c
+++ b/src/nautilus-window-slot.c
@@ -385,7 +385,7 @@ nautilus_window_slot_set_search_visible (NautilusWindowSlot *slot,
                }
 
                if (active_slot) {
-                       nautilus_window_grab_focus (slot->details->window);
+                       gtk_widget_grab_focus (GTK_WIDGET (slot->details->window));
                }
 
                /* Now hide the editor and clear its state */
@@ -2376,9 +2376,28 @@ nautilus_window_slot_dispose (GObject *object)
 }
 
 static void
+nautilus_window_slot_grab_focus (GtkWidget *widget)
+{
+        NautilusWindowSlot *slot;
+
+        slot = NAUTILUS_WINDOW_SLOT (widget);
+
+        GTK_WIDGET_CLASS (nautilus_window_slot_parent_class)->grab_focus (widget);
+
+        if (slot->details->search_visible) {
+                gtk_widget_grab_focus (GTK_WIDGET (slot->details->query_editor));
+        } else if (slot->details->content_view) {
+                gtk_widget_grab_focus (GTK_WIDGET (slot->details->content_view));
+        } else if (slot->details->new_content_view) {
+                gtk_widget_grab_focus (GTK_WIDGET (slot->details->new_content_view));
+        }
+}
+
+static void
 nautilus_window_slot_class_init (NautilusWindowSlotClass *klass)
 {
        GObjectClass *oclass = G_OBJECT_CLASS (klass);
+        GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 
        klass->active = real_active;
        klass->inactive = real_inactive;
@@ -2388,6 +2407,8 @@ nautilus_window_slot_class_init (NautilusWindowSlotClass *klass)
        oclass->set_property = nautilus_window_slot_set_property;
        oclass->get_property = nautilus_window_slot_get_property;
 
+        widget_class->grab_focus = nautilus_window_slot_grab_focus;
+
        signals[ACTIVE] =
                g_signal_new ("active",
                              G_TYPE_FROM_CLASS (klass),
diff --git a/src/nautilus-window.c b/src/nautilus-window.c
index e3c3f25..1b8d9d0 100644
--- a/src/nautilus-window.c
+++ b/src/nautilus-window.c
@@ -590,17 +590,17 @@ remember_focus_widget (NautilusWindow *window)
        }
 }
 
-void
-nautilus_window_grab_focus (NautilusWindow *window)
+static void
+nautilus_window_grab_focus (GtkWidget *widget)
 {
        NautilusWindowSlot *slot;
-       NautilusView *view;
 
-       slot = nautilus_window_get_active_slot (window);
-       view = nautilus_window_slot_get_view (slot);
+       slot = nautilus_window_get_active_slot (NAUTILUS_WINDOW (widget));
 
-       if (view) {
-               nautilus_view_grab_focus (view);
+        GTK_WIDGET_CLASS (nautilus_window_parent_class)->grab_focus (widget);
+
+       if (slot) {
+               gtk_widget_grab_focus (GTK_WIDGET (slot));
        }
 }
 
@@ -608,12 +608,7 @@ static void
 restore_focus_widget (NautilusWindow *window)
 {
        if (window->priv->last_focus_widget != NULL) {
-               if (NAUTILUS_IS_VIEW (window->priv->last_focus_widget)) {
-                       nautilus_view_grab_focus (NAUTILUS_VIEW (window->priv->last_focus_widget));
-               } else {
-                       gtk_widget_grab_focus (window->priv->last_focus_widget);
-               }
-
+               gtk_widget_grab_focus (window->priv->last_focus_widget);
                unset_focus_widget (window);
        }
 }
@@ -2285,7 +2280,7 @@ nautilus_window_view_visible (NautilusWindow *window,
                nautilus_window_slot_update_title (slot);
        }
 
-       nautilus_window_grab_focus (window);
+       gtk_widget_grab_focus (GTK_WIDGET (window));
 
        /* All slots, show window */
        gtk_widget_show (GTK_WIDGET (window));
@@ -2623,6 +2618,7 @@ nautilus_window_class_init (NautilusWindowClass *class)
        wclass->window_state_event = nautilus_window_state_event;
        wclass->button_press_event = nautilus_window_button_press_event;
        wclass->delete_event = nautilus_window_delete_event;
+        wclass->grab_focus = nautilus_window_grab_focus;
 
        class->close = real_window_close;
 
diff --git a/src/nautilus-window.h b/src/nautilus-window.h
index 4b16bf7..ed102d8 100644
--- a/src/nautilus-window.h
+++ b/src/nautilus-window.h
@@ -122,7 +122,6 @@ void                 nautilus_window_slot_close            (NautilusWindow *wind
                                                             NautilusWindowSlot *slot);
 
 void                 nautilus_window_sync_location_widgets (NautilusWindow *window);
-void                 nautilus_window_grab_focus            (NautilusWindow *window);
 
 void     nautilus_window_hide_sidebar         (NautilusWindow *window);
 void     nautilus_window_show_sidebar         (NautilusWindow *window);