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[mutter/wip/carlosg/input-thread: 40/101] core: Centralize cursor renderer and tracker updates


commit 9fb8d8338721d48a470436370115b35849dbc8d2
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Jul 13 14:09:44 2020 +0200

    core: Centralize cursor renderer and tracker updates
    
    These use now more of a "pull" model, where they receive update
    notifications and the relevant input position is queried, instead
    of the coordinates being passed along.
    
    This allows to treat cursor renderers all the same independently
    of the device they track. This notifying of position changes should
    ideally be more backend-y than core-y, a better location will be
    figured out in future commits.

 src/backends/meta-cursor-renderer.c                | 10 ++---
 src/backends/meta-cursor-renderer.h                |  4 +-
 src/backends/meta-cursor-tracker-private.h         |  4 +-
 src/backends/meta-cursor-tracker.c                 | 48 ++++------------------
 src/backends/meta-screen-cast-area-stream-src.c    | 14 +++----
 src/backends/meta-screen-cast-monitor-stream-src.c | 14 +++----
 src/backends/meta-screen-cast-window-stream-src.c  | 14 +++----
 src/backends/native/meta-seat-native.c             |  5 ++-
 src/backends/x11/meta-cursor-tracker-x11.c         |  4 +-
 src/core/events.c                                  | 19 ++++-----
 src/wayland/meta-wayland-tablet-manager.c          | 27 ------------
 src/wayland/meta-wayland-tablet-manager.h          |  3 --
 src/wayland/meta-wayland-tablet-tool.c             |  9 ----
 src/wayland/meta-wayland-tablet-tool.h             |  4 --
 14 files changed, 51 insertions(+), 128 deletions(-)
---
diff --git a/src/backends/meta-cursor-renderer.c b/src/backends/meta-cursor-renderer.c
index ba27eb848e..b80081774a 100644
--- a/src/backends/meta-cursor-renderer.c
+++ b/src/backends/meta-cursor-renderer.c
@@ -444,14 +444,14 @@ meta_cursor_renderer_force_update (MetaCursorRenderer *renderer)
 }
 
 void
-meta_cursor_renderer_set_position (MetaCursorRenderer *renderer,
-                                   float               x,
-                                   float               y)
+meta_cursor_renderer_update_position (MetaCursorRenderer *renderer)
 {
   MetaCursorRendererPrivate *priv = meta_cursor_renderer_get_instance_private (renderer);
+  graphene_point_t pos;
 
-  priv->current_x = x;
-  priv->current_y = y;
+  clutter_input_device_get_coords (priv->device, NULL, &pos);
+  priv->current_x = pos.x;
+  priv->current_y = pos.y;
 
   meta_cursor_renderer_update_cursor (renderer, priv->displayed_cursor);
 }
diff --git a/src/backends/meta-cursor-renderer.h b/src/backends/meta-cursor-renderer.h
index 2156d91253..37ddb9100d 100644
--- a/src/backends/meta-cursor-renderer.h
+++ b/src/backends/meta-cursor-renderer.h
@@ -60,9 +60,7 @@ MetaCursorRenderer * meta_cursor_renderer_new (MetaBackend        *backend,
 void meta_cursor_renderer_set_cursor (MetaCursorRenderer *renderer,
                                       MetaCursorSprite   *cursor_sprite);
 
-void meta_cursor_renderer_set_position (MetaCursorRenderer *renderer,
-                                        float               x,
-                                        float               y);
+void meta_cursor_renderer_update_position (MetaCursorRenderer *renderer);
 void meta_cursor_renderer_force_update (MetaCursorRenderer *renderer);
 
 MetaCursorSprite * meta_cursor_renderer_get_cursor (MetaCursorRenderer *renderer);
diff --git a/src/backends/meta-cursor-tracker-private.h b/src/backends/meta-cursor-tracker-private.h
index 779c2fe521..6d3c88c355 100644
--- a/src/backends/meta-cursor-tracker-private.h
+++ b/src/backends/meta-cursor-tracker-private.h
@@ -41,9 +41,7 @@ void     meta_cursor_tracker_unset_window_cursor (MetaCursorTracker *tracker);
 void     meta_cursor_tracker_set_root_cursor     (MetaCursorTracker *tracker,
                                                   MetaCursorSprite  *cursor_sprite);
 
-void     meta_cursor_tracker_update_position (MetaCursorTracker *tracker,
-                                              float              new_x,
-                                              float              new_y);
+void     meta_cursor_tracker_invalidate_position (MetaCursorTracker *tracker);
 
 void meta_cursor_tracker_track_position (MetaCursorTracker *tracker);
 
diff --git a/src/backends/meta-cursor-tracker.c b/src/backends/meta-cursor-tracker.c
index 3c6f6a0c43..6b3d2289ad 100644
--- a/src/backends/meta-cursor-tracker.c
+++ b/src/backends/meta-cursor-tracker.c
@@ -82,7 +82,7 @@ G_DEFINE_TYPE_WITH_PRIVATE (MetaCursorTracker, meta_cursor_tracker,
 enum
 {
   CURSOR_CHANGED,
-  CURSOR_MOVED,
+  POSITION_INVALIDATED,
   VISIBILITY_CHANGED,
   LAST_SIGNAL
 };
@@ -288,20 +288,12 @@ meta_cursor_tracker_class_init (MetaCursorTrackerClass *klass)
                                           NULL, NULL, NULL,
                                           G_TYPE_NONE, 0);
 
-  /**
-   * MetaCursorTracker::cursor-moved:
-   * @cursor: The #MetaCursorTracker
-   * @x: The new X coordinate of the cursor
-   * @y: The new Y coordinate of the cursor
-   *
-   * Notifies when the cursor has moved to a new location.
-   */
-  signals[CURSOR_MOVED] = g_signal_new ("cursor-moved",
-                                        G_TYPE_FROM_CLASS (klass),
-                                        G_SIGNAL_RUN_LAST,
-                                        0,
-                                        NULL, NULL, NULL,
-                                        G_TYPE_NONE, 0);
+  signals[POSITION_INVALIDATED] = g_signal_new ("position-invalidated",
+                                                G_TYPE_FROM_CLASS (klass),
+                                                G_SIGNAL_RUN_LAST,
+                                                0,
+                                                NULL, NULL, NULL,
+                                                G_TYPE_NONE, 0);
 
   signals[VISIBILITY_CHANGED] = g_signal_new ("visibility-changed",
                                               G_TYPE_FROM_CLASS (klass),
@@ -428,31 +420,9 @@ meta_cursor_tracker_set_root_cursor (MetaCursorTracker *tracker,
 }
 
 void
-meta_cursor_tracker_update_position (MetaCursorTracker *tracker,
-                                     float              new_x,
-                                     float              new_y)
+meta_cursor_tracker_invalidate_position (MetaCursorTracker *tracker)
 {
-  MetaCursorTrackerPrivate *priv =
-    meta_cursor_tracker_get_instance_private (tracker);
-  MetaCursorRenderer *cursor_renderer =
-    meta_backend_get_cursor_renderer (priv->backend);
-  gboolean position_changed;
-
-  if (priv->x != new_x || priv->y != new_y)
-    {
-      position_changed = TRUE;
-      priv->x = new_x;
-      priv->y = new_y;
-    }
-  else
-    {
-      position_changed = FALSE;
-    }
-
-  meta_cursor_renderer_set_position (cursor_renderer, new_x, new_y);
-
-  if (position_changed)
-    g_signal_emit (tracker, signals[CURSOR_MOVED], 0);
+  g_signal_emit (tracker, signals[POSITION_INVALIDATED], 0);
 }
 
 void
diff --git a/src/backends/meta-screen-cast-area-stream-src.c b/src/backends/meta-screen-cast-area-stream-src.c
index b69c26ac44..6a64bcb669 100644
--- a/src/backends/meta-screen-cast-area-stream-src.c
+++ b/src/backends/meta-screen-cast-area-stream-src.c
@@ -42,7 +42,7 @@ struct _MetaScreenCastAreaStreamSrc
 
   GList *watches;
 
-  gulong cursor_moved_handler_id;
+  gulong position_invalidated_handler_id;
   gulong cursor_changed_handler_id;
 
   guint maybe_record_idle_id;
@@ -182,8 +182,8 @@ sync_cursor_state (MetaScreenCastAreaStreamSrc *area_src)
 }
 
 static void
-cursor_moved (MetaCursorTracker           *cursor_tracker,
-              MetaScreenCastAreaStreamSrc *area_src)
+pointer_position_invalidated (MetaCursorTracker           *cursor_tracker,
+                              MetaScreenCastAreaStreamSrc *area_src)
 {
   sync_cursor_state (area_src);
 }
@@ -332,9 +332,9 @@ meta_screen_cast_area_stream_src_enable (MetaScreenCastStreamSrc *src)
   switch (meta_screen_cast_stream_get_cursor_mode (stream))
     {
     case META_SCREEN_CAST_CURSOR_MODE_METADATA:
-      area_src->cursor_moved_handler_id =
-        g_signal_connect_after (cursor_tracker, "cursor-moved",
-                                G_CALLBACK (cursor_moved),
+      area_src->position_invalidated_handler_id =
+        g_signal_connect_after (cursor_tracker, "position-invalidated",
+                                G_CALLBACK (pointer_position_invalidated),
                                 area_src);
       area_src->cursor_changed_handler_id =
         g_signal_connect_after (cursor_tracker, "cursor-changed",
@@ -383,7 +383,7 @@ meta_screen_cast_area_stream_src_disable (MetaScreenCastStreamSrc *src)
   if (area_src->hw_cursor_inhibited)
     uninhibit_hw_cursor (area_src);
 
-  g_clear_signal_handler (&area_src->cursor_moved_handler_id,
+  g_clear_signal_handler (&area_src->position_invalidated_handler_id,
                           cursor_tracker);
   g_clear_signal_handler (&area_src->cursor_changed_handler_id,
                           cursor_tracker);
diff --git a/src/backends/meta-screen-cast-monitor-stream-src.c 
b/src/backends/meta-screen-cast-monitor-stream-src.c
index 2986c0af3e..79e8dd231d 100644
--- a/src/backends/meta-screen-cast-monitor-stream-src.c
+++ b/src/backends/meta-screen-cast-monitor-stream-src.c
@@ -46,7 +46,7 @@ struct _MetaScreenCastMonitorStreamSrc
 
   GList *watches;
 
-  gulong cursor_moved_handler_id;
+  gulong position_invalidated_handler_id;
   gulong cursor_changed_handler_id;
 };
 
@@ -238,8 +238,8 @@ sync_cursor_state (MetaScreenCastMonitorStreamSrc *monitor_src)
 }
 
 static void
-cursor_moved (MetaCursorTracker              *cursor_tracker,
-              MetaScreenCastMonitorStreamSrc *monitor_src)
+pointer_position_invalidated (MetaCursorTracker              *cursor_tracker,
+                              MetaScreenCastMonitorStreamSrc *monitor_src)
 {
   sync_cursor_state (monitor_src);
 }
@@ -352,9 +352,9 @@ meta_screen_cast_monitor_stream_src_enable (MetaScreenCastStreamSrc *src)
   switch (meta_screen_cast_stream_get_cursor_mode (stream))
     {
     case META_SCREEN_CAST_CURSOR_MODE_METADATA:
-      monitor_src->cursor_moved_handler_id =
-        g_signal_connect_after (cursor_tracker, "cursor-moved",
-                                G_CALLBACK (cursor_moved),
+      monitor_src->position_invalidated_handler_id =
+        g_signal_connect_after (cursor_tracker, "position-invalidated",
+                                G_CALLBACK (pointer_position_invalidated),
                                 monitor_src);
       monitor_src->cursor_changed_handler_id =
         g_signal_connect_after (cursor_tracker, "cursor-changed",
@@ -408,7 +408,7 @@ meta_screen_cast_monitor_stream_src_disable (MetaScreenCastStreamSrc *src)
   if (monitor_src->hw_cursor_inhibited)
     uninhibit_hw_cursor (monitor_src);
 
-  g_clear_signal_handler (&monitor_src->cursor_moved_handler_id,
+  g_clear_signal_handler (&monitor_src->position_invalidated_handler_id,
                           cursor_tracker);
   g_clear_signal_handler (&monitor_src->cursor_changed_handler_id,
                           cursor_tracker);
diff --git a/src/backends/meta-screen-cast-window-stream-src.c 
b/src/backends/meta-screen-cast-window-stream-src.c
index e881d80f45..76f53d1600 100644
--- a/src/backends/meta-screen-cast-window-stream-src.c
+++ b/src/backends/meta-screen-cast-window-stream-src.c
@@ -37,7 +37,7 @@ struct _MetaScreenCastWindowStreamSrc
 
   unsigned long screen_cast_window_damaged_handler_id;
   unsigned long screen_cast_window_destroyed_handler_id;
-  unsigned long cursor_moved_handler_id;
+  unsigned long position_invalidated_handler_id;
   unsigned long cursor_changed_handler_id;
 
   gboolean cursor_bitmap_invalid;
@@ -323,7 +323,7 @@ meta_screen_cast_window_stream_src_stop (MetaScreenCastWindowStreamSrc *window_s
                           window_src->screen_cast_window);
   g_clear_signal_handler (&window_src->screen_cast_window_destroyed_handler_id,
                           window_src->screen_cast_window);
-  g_clear_signal_handler (&window_src->cursor_moved_handler_id,
+  g_clear_signal_handler (&window_src->position_invalidated_handler_id,
                           cursor_tracker);
   g_clear_signal_handler (&window_src->cursor_changed_handler_id,
                           cursor_tracker);
@@ -372,8 +372,8 @@ sync_cursor_state (MetaScreenCastWindowStreamSrc *window_src)
 }
 
 static void
-cursor_moved (MetaCursorTracker             *cursor_tracker,
-              MetaScreenCastWindowStreamSrc *window_src)
+pointer_position_invalidated (MetaCursorTracker             *cursor_tracker,
+                              MetaScreenCastWindowStreamSrc *window_src)
 {
   sync_cursor_state (window_src);
 }
@@ -420,9 +420,9 @@ meta_screen_cast_window_stream_src_enable (MetaScreenCastStreamSrc *src)
     {
     case META_SCREEN_CAST_CURSOR_MODE_METADATA:
     case META_SCREEN_CAST_CURSOR_MODE_EMBEDDED:
-      window_src->cursor_moved_handler_id =
-        g_signal_connect_after (cursor_tracker, "cursor-moved",
-                                G_CALLBACK (cursor_moved),
+      window_src->position_invalidated_handler_id =
+        g_signal_connect_after (cursor_tracker, "position-invalidated",
+                                G_CALLBACK (pointer_position_invalidated),
                                 window_src);
       window_src->cursor_changed_handler_id =
         g_signal_connect_after (cursor_tracker, "cursor-changed",
diff --git a/src/backends/native/meta-seat-native.c b/src/backends/native/meta-seat-native.c
index a5a83148e1..f5c7ecc8ef 100644
--- a/src/backends/native/meta-seat-native.c
+++ b/src/backends/native/meta-seat-native.c
@@ -2840,11 +2840,14 @@ meta_seat_native_warp_pointer (ClutterSeat *seat,
 {
   MetaSeatNative *seat_native = META_SEAT_NATIVE (seat);
   MetaBackend *backend = meta_get_backend ();
+  MetaCursorRenderer *cursor_renderer =
+    meta_backend_get_cursor_renderer (backend);
   MetaCursorTracker *cursor_tracker = meta_backend_get_cursor_tracker (backend);
 
   notify_absolute_motion (seat_native->core_pointer, 0, x, y, NULL);
 
-  meta_cursor_tracker_update_position (cursor_tracker, x, y);
+  meta_cursor_renderer_update_position (cursor_renderer);
+  meta_cursor_tracker_invalidate_position (cursor_tracker);
 }
 
 static gboolean
diff --git a/src/backends/x11/meta-cursor-tracker-x11.c b/src/backends/x11/meta-cursor-tracker-x11.c
index 1e6c39e71d..7355f828ea 100644
--- a/src/backends/x11/meta-cursor-tracker-x11.c
+++ b/src/backends/x11/meta-cursor-tracker-x11.c
@@ -69,10 +69,8 @@ static void
 update_position (MetaCursorTrackerX11 *tracker_x11)
 {
   MetaCursorTracker *tracker = META_CURSOR_TRACKER (tracker_x11);
-  graphene_point_t point;
 
-  meta_cursor_tracker_get_pointer (tracker, &point, NULL);
-  meta_cursor_tracker_update_position (tracker, point.x, point.y);
+  meta_cursor_tracker_invalidate_position (tracker);
 }
 
 static gboolean
diff --git a/src/core/events.c b/src/core/events.c
index 17dcaa0fe6..52828bdc93 100644
--- a/src/core/events.c
+++ b/src/core/events.c
@@ -288,22 +288,21 @@ meta_display_handle_event (MetaDisplay        *display,
 #ifdef HAVE_WAYLAND
   if (meta_is_wayland_compositor () && event->type == CLUTTER_MOTION)
     {
-      MetaWaylandCompositor *compositor;
+      MetaCursorRenderer *cursor_renderer;
+      ClutterInputDevice *device;
 
-      compositor = meta_wayland_compositor_get_default ();
+      device = clutter_event_get_device (event);
+      cursor_renderer = meta_backend_get_cursor_renderer_for_device (backend,
+                                                                     device);
+      if (cursor_renderer)
+        meta_cursor_renderer_update_position (cursor_renderer);
 
-      if (meta_wayland_tablet_manager_consumes_event (compositor->tablet_manager, event))
-        {
-          meta_wayland_tablet_manager_update_cursor_position (compositor->tablet_manager, event);
-        }
-      else
+      if (device == clutter_seat_get_pointer (clutter_input_device_get_seat (device)))
         {
           MetaCursorTracker *cursor_tracker =
             meta_backend_get_cursor_tracker (backend);
 
-          meta_cursor_tracker_update_position (cursor_tracker,
-                                               event->motion.x,
-                                               event->motion.y);
+          meta_cursor_tracker_invalidate_position (cursor_tracker);
         }
     }
 #endif
diff --git a/src/wayland/meta-wayland-tablet-manager.c b/src/wayland/meta-wayland-tablet-manager.c
index 38cec064e9..9c81d5afc2 100644
--- a/src/wayland/meta-wayland-tablet-manager.c
+++ b/src/wayland/meta-wayland-tablet-manager.c
@@ -242,30 +242,3 @@ meta_wayland_tablet_manager_ensure_seat (MetaWaylandTabletManager *manager,
 
   return tablet_seat;
 }
-
-void
-meta_wayland_tablet_manager_update_cursor_position (MetaWaylandTabletManager *manager,
-                                                    const ClutterEvent       *event)
-{
-  MetaWaylandTabletSeat *tablet_seat = NULL;
-  MetaWaylandTabletTool *tool = NULL;
-  ClutterInputDeviceTool *device_tool;
-  ClutterInputDevice *device;
-
-  device = clutter_event_get_source_device (event);
-  device_tool = clutter_event_get_device_tool (event);
-
-  if (device)
-    tablet_seat = meta_wayland_tablet_manager_lookup_seat (manager, device);
-
-  if (tablet_seat && device_tool)
-    tool = meta_wayland_tablet_seat_lookup_tool (tablet_seat, device_tool);
-
-  if (tool)
-    {
-      gfloat new_x, new_y;
-
-      clutter_event_get_coords (event, &new_x, &new_y);
-      meta_wayland_tablet_tool_set_cursor_position (tool, new_x, new_y);
-    }
-}
diff --git a/src/wayland/meta-wayland-tablet-manager.h b/src/wayland/meta-wayland-tablet-manager.h
index 5d4b28c2d6..83f9d3d0f4 100644
--- a/src/wayland/meta-wayland-tablet-manager.h
+++ b/src/wayland/meta-wayland-tablet-manager.h
@@ -50,7 +50,4 @@ MetaWaylandTabletSeat *
          meta_wayland_tablet_manager_ensure_seat    (MetaWaylandTabletManager *manager,
                                                      MetaWaylandSeat          *seat);
 
-void     meta_wayland_tablet_manager_update_cursor_position (MetaWaylandTabletManager *manager,
-                                                             const ClutterEvent       *event);
-
 #endif /* META_WAYLAND_TABLET_MANAGER_H */
diff --git a/src/wayland/meta-wayland-tablet-tool.c b/src/wayland/meta-wayland-tablet-tool.c
index 589e92ddd4..8ff2accb21 100644
--- a/src/wayland/meta-wayland-tablet-tool.c
+++ b/src/wayland/meta-wayland-tablet-tool.c
@@ -965,15 +965,6 @@ meta_wayland_tablet_tool_handle_event (MetaWaylandTabletTool *tool,
   return CLUTTER_EVENT_STOP;
 }
 
-void
-meta_wayland_tablet_tool_set_cursor_position (MetaWaylandTabletTool *tool,
-                                              float                  new_x,
-                                              float                  new_y)
-{
-  if (tool->cursor_renderer)
-    meta_cursor_renderer_set_position (tool->cursor_renderer, new_x, new_y);
-}
-
 static gboolean
 tablet_tool_can_grab_surface (MetaWaylandTabletTool *tool,
                               MetaWaylandSurface    *surface)
diff --git a/src/wayland/meta-wayland-tablet-tool.h b/src/wayland/meta-wayland-tablet-tool.h
index 7cf1d90770..e9ad7db40c 100644
--- a/src/wayland/meta-wayland-tablet-tool.h
+++ b/src/wayland/meta-wayland-tablet-tool.h
@@ -78,10 +78,6 @@ void     meta_wayland_tablet_tool_update              (MetaWaylandTabletTool  *t
 gboolean meta_wayland_tablet_tool_handle_event        (MetaWaylandTabletTool  *tool,
                                                        const ClutterEvent     *event);
 
-void     meta_wayland_tablet_tool_set_cursor_position (MetaWaylandTabletTool  *tool,
-                                                       float                   new_x,
-                                                       float                   new_y);
-
 gboolean meta_wayland_tablet_tool_can_grab_surface (MetaWaylandTabletTool *tool,
                                                     MetaWaylandSurface    *surface,
                                                     uint32_t               serial);
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