[gtk+] mir: Remove child window rendering hack

[William Hua <williamhua src gnome org>]

commit d43f5258ffc4fc0ef22e47eb00b5a3742e3716da
Author: William Hua <william hua canonical com>
Date:   Tue May 19 17:58:38 2015 -0500

    mir: Remove child window rendering hack

 gdk/mir/gdkmir-private.h    |   12 ----
 gdk/mir/gdkmireventsource.c |   88 +------------------------
 gdk/mir/gdkmirwindowimpl.c  |  147 +------------------------------------------
 3 files changed, 7 insertions(+), 240 deletions(-)
---
diff --git a/gdk/mir/gdkmir-private.h b/gdk/mir/gdkmir-private.h
index 847720b..2464434 100644
--- a/gdk/mir/gdkmir-private.h
+++ b/gdk/mir/gdkmir-private.h
@@ -133,16 +133,4 @@ void _gdk_mir_print_resize_event (const MirResizeEvent *event);
 
 void _gdk_mir_print_event (const MirEvent *event);
 
-/* TODO: Remove once we have proper transient window support. */
-GdkWindow * _gdk_mir_window_get_visible_transient_child (GdkWindow *window,
-                                                         gdouble    x,
-                                                         gdouble    y,
-                                                         gdouble   *out_x,
-                                                         gdouble   *out_y);
-
-/* TODO: Remove once we have proper transient window support. */
-void _gdk_mir_window_transient_children_foreach (GdkWindow  *window,
-                                                 void      (*func) (GdkWindow *, gpointer),
-                                                 gpointer    user_data);
-
 #endif /* __GDK_PRIVATE_MIR_H__ */
diff --git a/gdk/mir/gdkmireventsource.c b/gdk/mir/gdkmireventsource.c
index aed881c..a598fe5 100644
--- a/gdk/mir/gdkmireventsource.c
+++ b/gdk/mir/gdkmireventsource.c
@@ -148,6 +148,8 @@ generate_button_event (GdkWindow *window, GdkEventType type, gdouble x, gdouble
 {
   GdkEvent *event;
 
+  g_print ("%s %lf %lf\n", G_STRFUNC, x, y);
+
   event = gdk_event_new (type);
   event->button.x = x;
   event->button.y = y;
@@ -308,47 +310,6 @@ handle_key_event (GdkWindow *window, const MirInputEvent *event)
     }
 }
 
-/* TODO: Remove once we have proper transient window support. */
-typedef struct
-{
-  GdkWindow *except;
-  gdouble    x;
-  gdouble    y;
-  guint32    time;
-} LeaveInfo;
-
-/* TODO: Remove once we have proper transient window support. */
-/*
- * leave_windows_except:
- *
- * Generate a leave event for every window except the one the cursor is in.
- */
-static void
-leave_windows_except (GdkWindow *window,
-                      gpointer   user_data)
-{
-  LeaveInfo info = *((LeaveInfo *) user_data);
-
-  info.x -= window->x;
-  info.y -= window->y;
-
-  _gdk_mir_window_transient_children_foreach (window, leave_windows_except, &info);
-
-  if (window != info.except)
-    {
-      GdkMirWindowImpl *impl = GDK_MIR_WINDOW_IMPL (window->impl);
-      gboolean cursor_inside;
-      guint button_state;
-
-      _gdk_mir_window_impl_get_cursor_state (impl, NULL, NULL, &cursor_inside, &button_state);
-
-      if (cursor_inside)
-        generate_crossing_event (window, GDK_LEAVE_NOTIFY, info.x, info.y, info.time);
-
-      _gdk_mir_window_impl_set_cursor_state (impl, info.x, info.y, FALSE, button_state);
-    }
-}
-
 static guint
 mir_pointer_event_get_button_state (const MirPointerEvent *event)
 {
@@ -388,49 +349,6 @@ handle_motion_event (GdkWindow *window, const MirInputEvent *event)
   modifier_state = get_modifier_state (mir_pointer_event_modifiers (pointer_event), 
mir_pointer_event_get_button_state (pointer_event));
   event_time = NANO_TO_MILLI (mir_input_event_get_event_time (event));
 
-  /* TODO: Remove once we have proper transient window support. */
-  if (mir_pointer_event_action (pointer_event) == mir_pointer_action_leave)
-    {
-      LeaveInfo info;
-
-      info.x = x;
-      info.y = y;
-      info.time = event_time;
-      info.except = window;
-
-      /* Leave all transient children from leaf to root, except the root since we do it later. */
-      _gdk_mir_window_transient_children_foreach (window, leave_windows_except, &info);
-    }
-  else
-    {
-      LeaveInfo info;
-
-      info.x = x;
-      info.y = y;
-      info.time = event_time;
-      info.except = _gdk_mir_window_get_visible_transient_child (window, x, y, &x, &y);
-
-      /* Leave all transient children from leaf to root, except the pointer window since we enter it. */
-      _gdk_mir_window_transient_children_foreach (window, leave_windows_except, &info);
-
-      window = info.except;
-
-      if (window)
-        {
-          /* Enter the pointer window. */
-          gboolean cursor_inside_pointer_window;
-
-          impl = GDK_MIR_WINDOW_IMPL (window->impl);
-          _gdk_mir_window_impl_get_cursor_state (impl, NULL, NULL, &cursor_inside_pointer_window, NULL);
-
-          if (!cursor_inside_pointer_window)
-            {
-              generate_crossing_event (window, GDK_ENTER_NOTIFY, x, y, event_time);
-              _gdk_mir_window_impl_set_cursor_state (impl, x, y, TRUE, mir_pointer_event_get_button_state 
(pointer_event));
-            }
-        }
-    }
-
   if (window)
     {
       gdouble new_x;
@@ -444,6 +362,8 @@ handle_motion_event (GdkWindow *window, const MirInputEvent *event)
         {
         case mir_pointer_action_button_up:
         case mir_pointer_action_button_down:
+          g_print ("%s button up/down\n", G_STRFUNC);
+
           event_type = mir_pointer_event_action (pointer_event) == mir_pointer_action_button_down ? 
GDK_BUTTON_PRESS : GDK_BUTTON_RELEASE;
           changed_button_state = button_state ^ mir_pointer_event_get_button_state (pointer_event);
           if (changed_button_state == 0 || (changed_button_state & mir_pointer_button_primary) != 0)
diff --git a/gdk/mir/gdkmirwindowimpl.c b/gdk/mir/gdkmirwindowimpl.c
index 9cafcc9..c556d1f 100644
--- a/gdk/mir/gdkmirwindowimpl.c
+++ b/gdk/mir/gdkmirwindowimpl.c
@@ -46,9 +46,6 @@ struct _GdkMirWindowImpl
   gint transient_x;
   gint transient_y;
 
-  /* Child windows (e.g. tooltips) */
-  GList *transient_children;
-
   /* Desired surface attributes */
   MirSurfaceType surface_type;
   MirSurfaceState surface_state;
@@ -199,15 +196,6 @@ create_mir_surface (GdkDisplay *display,
   return surface;
 }
 
-/* TODO: Remove once we have proper transient window support. */
-static gboolean
-should_render_in_parent (GdkWindow *window)
-{
-  GdkMirWindowImpl *impl = GDK_MIR_WINDOW_IMPL (window->impl);
-
-  return impl->transient_for && gdk_window_get_window_type (window) != GDK_WINDOW_TOPLEVEL;
-}
-
 static void
 ensure_surface_full (GdkWindow *window,
                      MirBufferUsage buffer_usage)
@@ -215,7 +203,7 @@ ensure_surface_full (GdkWindow *window,
   GdkMirWindowImpl *impl = GDK_MIR_WINDOW_IMPL (window->impl);
   GdkMirWindowReference *window_ref;
 
-  if (impl->surface || should_render_in_parent (window))
+  if (impl->surface)
     return;
 
   /* no destroy notify -- we must leak for now
@@ -304,41 +292,6 @@ send_buffer (GdkWindow *window)
 {
   GdkMirWindowImpl *impl = GDK_MIR_WINDOW_IMPL (window->impl);
 
-  /* Transient windows draw onto parent instead */
-  if (should_render_in_parent (window))
-    {
-      redraw_transient (window);
-      return;
-    }
-
-  /* Composite transient windows over this one */
-  if (impl->transient_children)
-    {
-      cairo_surface_t *surface;
-      cairo_t *c;
-      GList *link;
-
-      surface = gdk_mir_window_impl_ref_cairo_surface (window);
-      c = cairo_create (surface);
-
-      for (link = impl->transient_children; link; link = link->next)
-        {
-          GdkWindow *child_window = link->data;
-          GdkMirWindowImpl *child_impl = GDK_MIR_WINDOW_IMPL (child_window->impl);
-
-          /* Skip children not yet drawn to */
-          if (!child_impl->cairo_surface)
-            continue;
-
-          cairo_set_source_surface (c, child_impl->cairo_surface, child_window->x, child_window->y);
-          cairo_rectangle (c, child_window->x, child_window->y, child_window->width, child_window->height);
-          cairo_fill (c);
-        }
-
-      cairo_destroy (c);
-      cairo_surface_destroy (surface);
-    }
-
   /* Send the completed buffer to Mir */
   mir_surface_swap_buffers_sync (impl->surface);
 
@@ -363,7 +316,7 @@ gdk_mir_window_impl_ref_cairo_surface (GdkWindow *window)
     }
 
   /* Transient windows get rendered into a buffer and copied onto their parent */
-  if (should_render_in_parent (window) || window->gl_paint_context)
+  if (window->gl_paint_context)
     {
       cairo_surface = cairo_image_surface_create (pixel_format, window->width, window->height);
     }
@@ -411,19 +364,12 @@ gdk_mir_window_impl_finalize (GObject *object)
   GdkMirWindowImpl *impl = GDK_MIR_WINDOW_IMPL (object);
   GList *link;
 
-  for (link = impl->transient_children; link; link = link->next)
-    {
-      GdkWindow *window = link->data;
-      gdk_window_destroy (window);
-    }
-
   if (impl->background)
     cairo_pattern_destroy (impl->background);
   if (impl->surface)
     mir_surface_release_sync (impl->surface);
   if (impl->cairo_surface)
     cairo_surface_destroy (impl->cairo_surface);
-  g_list_free (impl->transient_children);
 
   G_OBJECT_CLASS (gdk_mir_window_impl_parent_class)->finalize (object);
 }
@@ -460,9 +406,6 @@ gdk_mir_window_impl_hide (GdkWindow *window)
   impl->cursor_inside = FALSE;
   impl->visible = FALSE;
   ensure_no_surface (window);
-
-  if (should_render_in_parent (window))
-    redraw_transient (window);
 }
 
 static void
@@ -474,9 +417,6 @@ gdk_mir_window_impl_withdraw (GdkWindow *window)
   impl->cursor_inside = FALSE;
   impl->visible = FALSE;
   ensure_no_surface (window);
-
-  if (should_render_in_parent (window))
-    redraw_transient (window);
 }
 
 static void
@@ -530,19 +470,10 @@ gdk_mir_window_impl_move_resize (GdkWindow *window,
   GdkMirWindowImpl *impl = GDK_MIR_WINDOW_IMPL (window->impl);
   gboolean recreate_surface = FALSE;
 
-  /* Redraw parent where we moved from */
-  if (should_render_in_parent (window))
-    redraw_transient (window);
-
   /* Transient windows can move wherever they want */
   if (with_move)
     {
-      if (should_render_in_parent (window))
-        {
-          window->x = x;
-          window->y = y;
-        }
-      else if (x != impl->transient_x || y != impl->transient_y)
+      if (x != impl->transient_x || y != impl->transient_y)
         {
           impl->transient_x = x;
           impl->transient_y = y;
@@ -564,10 +495,6 @@ gdk_mir_window_impl_move_resize (GdkWindow *window,
       ensure_no_surface (window);
       ensure_surface (window);
     }
-
-  /* Redraw parent where we moved to */
-  if (should_render_in_parent (window))
-    redraw_transient (window);
 }
 
 static void
@@ -742,16 +669,6 @@ gdk_mir_window_impl_destroy (GdkWindow *window,
 
   impl->visible = FALSE;
   ensure_no_surface (window);
-
-  if (should_render_in_parent (window))
-    {
-      /* Redraw parent */
-      redraw_transient (window);
-
-      /* Remove from transient list */
-      GdkMirWindowImpl *parent_impl = GDK_MIR_WINDOW_IMPL (impl->transient_for->impl);
-      parent_impl->transient_children = g_list_remove (parent_impl->transient_children, window);
-    }
 }
 
 static void
@@ -911,64 +828,6 @@ gdk_mir_window_impl_set_transient_for (GdkWindow *window,
 
   /* Link this window to the parent */
   impl->transient_for = parent;
-  if (should_render_in_parent (window))
-    {
-      GdkMirWindowImpl *parent_impl = GDK_MIR_WINDOW_IMPL (parent->impl);
-      parent_impl->transient_children = g_list_append (parent_impl->transient_children, window);
-
-      /* Move to where the client requested */
-      window->x = impl->transient_x;
-      window->y = impl->transient_y;
-
-      /* Remove surface if we had made one before this was set */
-      ensure_no_surface (window);
-
-      /* Redraw onto parent */
-      redraw_transient (window);
-    }
-}
-
-/* TODO: Remove once we have proper transient window support. */
-GdkWindow *
-_gdk_mir_window_get_visible_transient_child (GdkWindow *window,
-                                             gdouble    x,
-                                             gdouble    y,
-                                             gdouble   *out_x,
-                                             gdouble   *out_y)
-{
-  GdkMirWindowImpl *impl = GDK_MIR_WINDOW_IMPL (window->impl);
-  GdkWindow *child = NULL;
-  GList *i;
-
-  x -= window->x;
-  y -= window->y;
-
-  if (x < 0 || x >= window->width || y < 0 || y >= window->height)
-    return NULL;
-
-  for (i = impl->transient_children; i && !child; i = i->next)
-    {
-      if (GDK_MIR_WINDOW_IMPL (GDK_WINDOW (i->data)->impl)->visible)
-        child = _gdk_mir_window_get_visible_transient_child (i->data, x, y, out_x, out_y);
-    }
-
-  if (child)
-    return child;
-
-  *out_x = x;
-  *out_y = y;
-
-  return window;
-}
-
-/* TODO: Remove once we have proper transient window support. */
-void
-_gdk_mir_window_transient_children_foreach (GdkWindow  *window,
-                                            void      (*func) (GdkWindow *, gpointer),
-                                            gpointer    user_data)
-{
-  GdkMirWindowImpl *impl = GDK_MIR_WINDOW_IMPL (window->impl);
-  g_list_foreach (impl->transient_children, (GFunc) func, user_data);
 }
 
 static void