[mutter] core: Add meta_close_dialog_focus() vmethod

[Carlos Garnacho <carlosg src gnome org>]

commit 408292959e0b59d5be257a4a6f8e726dcf9e60b6
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Jul 14 23:34:05 2017 +0200

    core: Add meta_close_dialog_focus() vmethod
    
    This is used to request key focus on the close dialog whenever
    a window that is frozen would receive key focus. Also, ensure
    that the dialog gets focus when first shown if the window was
    meant to receive input.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=762083

 src/core/delete.c            |    5 +++++
 src/core/meta-close-dialog.c |   19 +++++++++++++++++++
 src/core/window.c            |    4 ++++
 src/meta/meta-close-dialog.h |    2 ++
 4 files changed, 30 insertions(+), 0 deletions(-)
---
diff --git a/src/core/delete.c b/src/core/delete.c
index 3727bd2..af7cffe 100644
--- a/src/core/delete.c
+++ b/src/core/delete.c
@@ -66,6 +66,11 @@ meta_window_set_alive (MetaWindow *window,
     {
       meta_window_ensure_close_dialog (window);
       meta_close_dialog_show (window->close_dialog);
+
+      if (window->display &&
+          window->display->event_route == META_EVENT_ROUTE_NORMAL &&
+          window == window->display->focus_window)
+        meta_close_dialog_focus (window->close_dialog);
     }
 }
 
diff --git a/src/core/meta-close-dialog.c b/src/core/meta-close-dialog.c
index bdec804..b105602 100644
--- a/src/core/meta-close-dialog.c
+++ b/src/core/meta-close-dialog.c
@@ -121,3 +121,22 @@ meta_close_dialog_is_visible (MetaCloseDialog *dialog)
 {
   return GPOINTER_TO_INT (g_object_get_qdata (G_OBJECT (dialog), quark_visible));
 }
+
+/**
+ * meta_close_dialog_focus:
+ * @dialog: a #MetaCloseDialog
+ *
+ * Call whenever @dialog should receive keyboard focus,
+ * usually when the window would.
+ **/
+void
+meta_close_dialog_focus (MetaCloseDialog *dialog)
+{
+  MetaCloseDialogInterface *iface;
+
+  g_return_if_fail (META_IS_CLOSE_DIALOG (dialog));
+
+  iface = META_CLOSE_DIALOG_GET_IFACE (dialog);
+  if (iface->focus)
+    iface->focus (dialog);
+}
diff --git a/src/core/window.c b/src/core/window.c
index 9a607c8..68d5bcb 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -4369,6 +4369,10 @@ meta_window_focus (MetaWindow  *window,
       clutter_stage_set_key_focus (stage, NULL);
     }
 
+  if (window->close_dialog &&
+      meta_close_dialog_is_visible (window->close_dialog))
+    meta_close_dialog_focus (window->close_dialog);
+
   if (window->wm_state_demands_attention)
     meta_window_unset_demands_attention(window);
 
diff --git a/src/meta/meta-close-dialog.h b/src/meta/meta-close-dialog.h
index 77d2252..0b4ac22 100644
--- a/src/meta/meta-close-dialog.h
+++ b/src/meta/meta-close-dialog.h
@@ -42,10 +42,12 @@ struct _MetaCloseDialogInterface
 
   void (* show) (MetaCloseDialog *dialog);
   void (* hide) (MetaCloseDialog *dialog);
+  void (* focus) (MetaCloseDialog *dialog);
 };
 
 void              meta_close_dialog_show (MetaCloseDialog *dialog);
 void              meta_close_dialog_hide (MetaCloseDialog *dialog);
+void              meta_close_dialog_focus (MetaCloseDialog *dialog);
 gboolean          meta_close_dialog_is_visible (MetaCloseDialog *dialog);
 
 void              meta_close_dialog_response (MetaCloseDialog         *dialog,