[gtksourceview/wip/chergert/snippets: 79/119] completion: use gdk_surface_move_to_rect()

[Christian Hergert <chergert src gnome org>]

commit 5fe20db9defc0b8b64bc219a9b9fa4eab0101723
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jan 15 14:11:55 2020 -0800

    completion: use gdk_surface_move_to_rect()
    
    This avoids manual control over placement and instead relies on the
    window manager (or GDK on X11) to place the window in an appropriate
    place using relative gravity of windows.

 gtksourceview/gtksourcecompletion.c | 56 ++++++++++++++-----------------------
 1 file changed, 21 insertions(+), 35 deletions(-)
---
diff --git a/gtksourceview/gtksourcecompletion.c b/gtksourceview/gtksourcecompletion.c
index cef4aa90..3c8f2ddc 100644
--- a/gtksourceview/gtksourcecompletion.c
+++ b/gtksourceview/gtksourcecompletion.c
@@ -738,34 +738,34 @@ gtk_source_completion_activate_proposal (GtkSourceCompletion *completion)
 static void
 update_info_position (GtkSourceCompletion *completion)
 {
-       GdkDisplay *display;
-       GdkMonitor *monitor;
-       GdkWindow *window;
+       GdkSurface *main_surface;
+       GdkSurface *info_surface;
        GdkRectangle geom;
-       gint x, y;
-       gint width, height;
-       gint info_width;
 
-       gtk_window_get_position (GTK_WINDOW (completion->main_window), &x, &y);
-       gtk_window_get_size (GTK_WINDOW (completion->main_window), &width, &height);
-       gtk_window_get_size (GTK_WINDOW (completion->info_window), &info_width, NULL);
-
-       display = gtk_widget_get_display (GTK_WIDGET (completion->main_window));
-       window = gtk_widget_get_window (GTK_WIDGET (completion->main_window));
-       monitor = gdk_display_get_monitor_at_window (display, window);
-       gdk_monitor_get_geometry (monitor, &geom);
-
-       /* Determine on which side to place it */
-       if (x + width + info_width >= geom.width)
+       if (!GTK_IS_NATIVE (completion->main_window) ||
+           !GTK_IS_NATIVE (completion->info_window))
        {
-               x -= info_width;
+               return;
        }
-       else
+
+       main_surface = gtk_native_get_surface (GTK_NATIVE (completion->main_window));
+       info_surface = gtk_native_get_surface (GTK_NATIVE (completion->info_window));
+
+       if (main_surface == NULL || info_surface == NULL)
        {
-               x += width;
+               return;
        }
 
-       gtk_window_move (GTK_WINDOW (completion->info_window), x, y);
+       gdk_surface_get_position (main_surface, &geom.x, &geom.y);
+       geom.width = gdk_surface_get_width (main_surface);
+       geom.height = gdk_surface_get_height (main_surface);
+
+       gdk_surface_move_to_rect (info_surface,
+                                 &geom,
+                                 GDK_GRAVITY_NORTH_EAST,
+                                 GDK_GRAVITY_NORTH_WEST,
+                                 GDK_ANCHOR_FLIP_X,
+                                 0, 0);
 }
 
 static GtkSourceCompletionProvider *
@@ -1261,15 +1261,6 @@ selection_changed_cb (GtkTreeSelection    *selection,
        }
 }
 
-static gboolean
-gtk_source_completion_configure_event (GtkWidget           *widget,
-                                       GdkEventConfigure   *event,
-                                       GtkSourceCompletion *completion)
-{
-       update_info_position (completion);
-       return FALSE;
-}
-
 static gboolean
 hide_completion_cb (GtkSourceCompletion *completion)
 {
@@ -2182,11 +2173,6 @@ init_main_window (GtkSourceCompletion *completion,
        gtk_window_set_attached_to (GTK_WINDOW (completion->main_window),
                                    GTK_WIDGET (completion->view));
 
-       g_signal_connect (completion->main_window,
-                         "configure-event",
-                         G_CALLBACK (gtk_source_completion_configure_event),
-                         completion);
-
        g_signal_connect_swapped (completion->main_window,
                                  "size-allocate",
                                  G_CALLBACK (update_window_position),