view: make view_move_resize always work

It was not working before because in the case of wayland
we are only dealing with sizes as wayland has no notion
of a global position. A wayland client would thus not
necessarily respond to a configure request which sets
the same size again. This causes us to also not apply
a new position set in view->pending because there may
be no commit from the client in those cases.

We previously worked around this issue in some parts
of the code to check our new sizes against the pending
ones and if they were the same we would call view_move
instead. That had two issues:

- Not all parts of the code did that which could end up
  delaying the positioning either to the next completely
  unrelated xdg commit event or to the next view_move call

- The code started to repeat itself, e.g. the same condition
  with calls to either view_move or view_move_resize based
  on the result

This patch fixes it by doing the check in the xdg configure
handler instead. Xwayland is unaffected by this issue as we
are always configuring a xwayland client with both, position
and size.

src/view.c

@@ -162,7 +162,6 @@ view_moved(struct view *view)
 	}
 }
 
-/* N.B. Use view_move() if not resizing. */
 void
 view_move_resize(struct view *view, struct wlr_box geo)
 {
@@ -417,13 +416,7 @@ view_apply_region_geometry(struct view *view)
 	geo.width -= margin.left + margin.right;
 	geo.height -= margin.top + margin.bottom;
 
-	if (view->pending.width == geo.width
-			&& view->pending.height == geo.height) {
-		/* move horizontally/vertically without changing size */
-		view_move(view, geo.x, geo.y);
-	} else {
 	view_move_resize(view, geo);
-	}
 }
 
 static void
@@ -439,13 +432,7 @@ view_apply_tiled_geometry(struct view *view, struct output *output)
 	}
 
 	struct wlr_box dst = view_get_edge_snap_box(view, output, view->tiled);
-	if (view->pending.width == dst.width
-			&& view->pending.height == dst.height) {
-		/* move horizontally/vertically without changing size */
-		view_move(view, dst.x, dst.y);
-	} else {
 	view_move_resize(view, dst);
-	}
 }
 
 static void

src/xdg.c

@@ -200,24 +200,6 @@ handle_set_app_id(struct wl_listener *listener, void *data)
 	view_update_app_id(view);
 }
 
-static void
-xdg_toplevel_view_configure(struct view *view, struct wlr_box geo)
-{
-	view_adjust_size(view, &geo.width, &geo.height);
-	view->pending = geo;
-
-	struct wlr_xdg_toplevel *xdg_toplevel = xdg_toplevel_from_view(view);
-	uint32_t serial = wlr_xdg_toplevel_set_size(xdg_toplevel,
-		(uint32_t)geo.width, (uint32_t)geo.height);
-	if (serial > 0) {
-		view->pending_configure_serial = serial;
-	} else if (view->pending_configure_serial == 0) {
-		view->current.x = geo.x;
-		view->current.y = geo.y;
-		view_moved(view);
-	}
-}
-
 static void
 xdg_toplevel_view_move(struct view *view, int x, int y)
 {
@@ -231,6 +213,38 @@ xdg_toplevel_view_move(struct view *view, int x, int y)
 	view_moved(view);
 }
 
+static void
+xdg_toplevel_view_configure(struct view *view, struct wlr_box geo)
+{
+	view_adjust_size(view, &geo.width, &geo.height);
+
+	if (view->pending.width == geo.width && view->pending.height == geo.height) {
+		/*
+		 * As wayland has no notion of a global position
+		 * we are only updating the size. If a wayland
+		 * client receives the same size it already has
+		 * it might not respond to the configure request
+		 * and thus we will never actually set the new
+		 * position. To handle this case just call move
+		 * directly.
+		 */
+		xdg_toplevel_view_move(view, geo.x, geo.y);
+		return;
+	}
+
+	view->pending = geo;
+	struct wlr_xdg_toplevel *xdg_toplevel = xdg_toplevel_from_view(view);
+	uint32_t serial = wlr_xdg_toplevel_set_size(xdg_toplevel,
+		(uint32_t)geo.width, (uint32_t)geo.height);
+	if (serial > 0) {
+		view->pending_configure_serial = serial;
+	} else if (view->pending_configure_serial == 0) {
+		view->current.x = geo.x;
+		view->current.y = geo.y;
+		view_moved(view);
+	}
+}
+
 static void
 xdg_toplevel_view_close(struct view *view)
 {