Implement damage tracking

README.md

@@ -35,7 +35,7 @@ The following were considered before choosing wlroots: [qtwayland](https://githu
 Dependencies include:
 
 - meson, ninja
-- wlroots (>=0.11.0)
+- wlroots (0.11.0 - 0.12.0)
 - wayland (>=1.16)
 - wayland-protocols
 - xwayland, xcb (optional)
@@ -95,8 +95,8 @@ No acceptance criteria exists, but the following list indicates the inteded high
 - [x] Show maximize, iconify, close buttons
 - [x] Catch SIGHUP to re-load config file and theme
 - [x] Support layer-shell protocol ('exclusive' not yet implemented)
-- [ ] Support root-menu and parse menu.xml (very simple implementation, not submenus yet)
-- [ ] Support damage tracking to reduce CPU usage
+- [x] Support damage tracking to reduce CPU usage
+- [ ] Support root-menu and parse menu.xml (very simple implementation, no submenus yet)
 - [ ] Support 'maximize'
 - [ ] Support wlr-output-management protocol and [kanshi](https://github.com/emersion/kanshi.git)
 - [ ] Support foreign-toplevel protocol (e.g. to integrate with wlroots panels/bars)

include/labwc.h

@@ -19,6 +19,7 @@
 #include <wlr/types/wlr_layer_shell_v1.h>
 #include <wlr/types/wlr_matrix.h>
 #include <wlr/types/wlr_output.h>
+#include <wlr/types/wlr_output_damage.h>
 #include <wlr/types/wlr_output_layout.h>
 #include <wlr/types/wlr_pointer.h>
 #include <wlr/types/wlr_seat.h>
@@ -123,9 +124,11 @@ struct output {
 	struct wl_list link;
 	struct server *server;
 	struct wlr_output *wlr_output;
+	struct wlr_output_damage *damage;
 	struct wl_list layers[4];
-	struct wl_listener frame;
 	struct wl_listener destroy;
+	struct wl_listener damage_frame;
+	struct wl_listener damage_destroy;
 };
 
 enum view_type {
@@ -151,6 +154,8 @@ enum deco_part {
 struct view_impl {
 	void (*configure)(struct view *view, struct wlr_box geo);
 	void (*close)(struct view *view);
+	void (*for_each_popup)(struct view *view,
+		wlr_surface_iterator_func_t iterator, void *data);
 	void (*for_each_surface)(struct view *view,
 		wlr_surface_iterator_func_t iterator, void *data);
 	void (*map)(struct view *view);
@@ -211,6 +216,7 @@ struct view {
 	struct wl_listener request_move;
 	struct wl_listener request_resize;
 	struct wl_listener request_configure;
+	struct wl_listener new_popup; /* xdg-shell only */
 };
 
 #if HAVE_XWAYLAND
@@ -228,6 +234,17 @@ struct xwayland_unmanaged {
 };
 #endif
 
+struct xdg_popup {
+	struct wlr_xdg_popup *wlr_popup;
+	struct view *view;
+
+	struct wl_listener destroy;
+	struct wl_listener commit;
+	struct wl_listener map;
+	struct wl_listener unmap;
+	struct wl_listener new_popup;
+};
+
 void xdg_toplevel_decoration(struct wl_listener *listener, void *data);
 void xdg_surface_new(struct wl_listener *listener, void *data);
 
@@ -243,6 +260,8 @@ void view_minimize(struct view *view);
 void view_unminimize(struct view *view);
 void view_for_each_surface(struct view *view,
 	wlr_surface_iterator_func_t iterator, void *user_data);
+void view_for_each_popup(struct view *view,
+	wlr_surface_iterator_func_t iterator, void *data);
 
 void desktop_focus_view(struct seat *seat, struct view *view);
 
@@ -270,6 +289,12 @@ void interactive_begin(struct view *view, enum input_mode mode,
 		       uint32_t edges);
 
 void output_init(struct server *server);
+void output_damage_surface(struct output *output, struct wlr_surface *surface,
+	double lx, double ly, bool whole);
+
+void damage_all_outputs(struct server *server);
+void damage_view_whole(struct view *view);
+void damage_view_part(struct view *view);
 
 void server_init(struct server *server);
 void server_start(struct server *server);

meson.build

@@ -49,6 +49,7 @@ glib            = dependency('glib-2.0')
 cairo           = dependency('cairo')
 pangocairo      = dependency('pangocairo')
 input           = dependency('libinput', version: '>=1.14')
+pixman          = dependency('pixman-1')
 
 if get_option('xwayland').enabled() and not wlroots_has_xwayland
 	error('no wlroots Xwayland support')
@@ -63,7 +64,7 @@ subdir('protocols')
 
 labwc_deps      = [
   server_protos, wayland_server, wlroots, xkbcommon, xml2, glib,
-  cairo, pangocairo, input
+  cairo, pangocairo, input, pixman
 ]
 
 subdir('include')

src/action.c

@@ -15,6 +15,7 @@ show_menu(struct server *server, const char *menu)
 		menu_move(server->rootmenu, server->seat.cursor->x,
 			server->seat.cursor->y);
 	}
+	damage_all_outputs(server);
 }
 
 void
@@ -29,6 +30,7 @@ action(struct server *server, const char *action, const char *command)
 	} else if (!strcasecmp(action, "Exit")) {
 		wl_display_terminate(server->wl_display);
 	} else if (!strcasecmp(action, "NextWindow")) {
+		dbg_show_views(server);
 		server->cycle_view =
 			desktop_cycle_view(server, server->cycle_view);
 	} else if (!strcasecmp(action, "Reconfigure")) {

src/cursor.c

@@ -66,6 +66,7 @@ request_set_selection_notify(struct wl_listener *listener, void *data)
 static void
 process_cursor_move(struct server *server, uint32_t time)
 {
+	damage_all_outputs(server);
 	/* Move the grabbed view to the new position. */
 	double dx = server->seat.cursor->x - server->grab_x;
 	double dy = server->seat.cursor->y - server->grab_y;
@@ -81,10 +82,7 @@ process_cursor_move(struct server *server, uint32_t time)
 static void
 process_cursor_resize(struct server *server, uint32_t time)
 {
-	/*
-	 * TODO: Wait for the client to prepare a buffer at the new size, then
-	 * commit any movement that was prepared.
-	 */
+	damage_all_outputs(server);
 	double dx = server->seat.cursor->x - server->grab_x;
 	double dy = server->seat.cursor->y - server->grab_y;
 
@@ -128,6 +126,7 @@ process_cursor_motion(struct server *server, uint32_t time)
 	} else if (server->input_mode == LAB_INPUT_STATE_MENU) {
 		menu_set_selected(server->rootmenu,
 			server->seat.cursor->x, server->seat.cursor->y);
+		damage_all_outputs(server);
 		return;
 	}
 
@@ -285,6 +284,7 @@ cursor_button(struct wl_listener *listener, void *data)
 		}
 		/* Exit interactive move/resize/menu mode. */
 		server->input_mode = LAB_INPUT_STATE_PASSTHROUGH;
+		damage_all_outputs(server);
 		return;
 	}
 

src/damage.c

@@ -0,0 +1,32 @@
+#include "labwc.h"
+
+void
+damage_all_outputs(struct server *server)
+{
+	struct output *output;
+	wl_list_for_each(output, &server->outputs, link) {
+		if (output && output->wlr_output && output->damage) {
+			wlr_output_damage_add_whole(output->damage);
+		}
+	}
+}
+
+void
+damage_view_part(struct view *view)
+{
+	struct output *output;
+	wl_list_for_each (output, &view->server->outputs, link) {
+		output_damage_surface(output, view->surface, view->x, view->y,
+			false);
+	}
+}
+
+void
+damage_view_whole(struct view *view)
+{
+	struct output *output;
+	wl_list_for_each (output, &view->server->outputs, link) {
+		output_damage_surface(output, view->surface, view->x, view->y,
+			true);
+	}
+}

src/desktop.c

@@ -148,6 +148,7 @@ desktop_cycle_view(struct server *server, struct view *current)
 	do {
 		view = wl_container_of(view->link.next, view, link);
 	} while (&view->link == &server->views || !isfocusable(view));
+	damage_all_outputs(server);
 	return view;
 }
 

src/keyboard.c

@@ -49,6 +49,7 @@ keyboard_key_notify(struct wl_listener *listener, void *data)
 		wlr_keyboard_get_modifiers(device->keyboard);
 
 	if (server->cycle_view) {
+		damage_all_outputs(server);
 		if ((syms[0] == XKB_KEY_Alt_L) &&
 		    event->state == WL_KEYBOARD_KEY_STATE_RELEASED) {
 			/* end cycle */

src/layers.c

@@ -258,6 +258,7 @@ surface_commit_notify(struct wl_listener *listener, void *data)
 		wl_container_of(listener, layer, surface_commit);
 	struct wlr_output *wlr_output = layer->layer_surface->output;
 	arrange_layers(output_from_wlr_output(layer->server, wlr_output));
+	damage_all_outputs(layer->server);
 }
 
 static void
@@ -267,6 +268,7 @@ unmap(struct lab_layer_surface *layer)
 	if (seat->focused_layer == layer->layer_surface) {
 		seat_set_focus_layer(seat, NULL);
 	}
+	damage_all_outputs(layer->server);
 }
 
 static void

src/meson.build

@@ -1,6 +1,7 @@
 labwc_sources = files(
   'action.c',
   'cursor.c',
+  'damage.c',
   'deco.c',
   'desktop.c',
   'interactive.c',

src/view.c

@@ -39,3 +39,13 @@ view_for_each_surface(struct view *view, wlr_surface_iterator_func_t iterator,
 	view->impl->for_each_surface(view, iterator, user_data);
 }
 
+void
+view_for_each_popup(struct view *view, wlr_surface_iterator_func_t iterator,
+		void *data)
+{
+	if (!view->impl->for_each_popup) {
+		return;
+	}
+	view->impl->for_each_popup(view, iterator, data);
+}
+

src/xdg.c

@@ -52,6 +52,86 @@ xdg_toplevel_decoration(struct wl_listener *listener, void *data)
 	xdg_deco_request_mode(&xdg_deco->request_mode, wlr_decoration);
 }
 
+static void
+handle_xdg_popup_commit(struct wl_listener *listener, void *data)
+{
+	struct xdg_popup *popup = wl_container_of(listener, popup, map);
+	/* TODO */
+}
+
+static void
+handle_xdg_popup_map(struct wl_listener *listener, void *data)
+{
+	struct xdg_popup *popup = wl_container_of(listener, popup, map);
+	damage_view_whole(popup->view);
+}
+
+static void
+handle_xdg_popup_unmap(struct wl_listener *listener, void *data)
+{
+	struct xdg_popup *popup = wl_container_of(listener, popup, unmap);
+	damage_view_whole(popup->view);
+}
+
+static void
+handle_xdg_popup_destroy(struct wl_listener *listener, void *data)
+{
+	struct xdg_popup *popup = wl_container_of(listener, popup, destroy);
+	wl_list_remove(&popup->destroy.link);
+	wl_list_remove(&popup->commit.link);
+	wl_list_remove(&popup->map.link);
+	wl_list_remove(&popup->unmap.link);
+	wl_list_remove(&popup->new_popup.link);
+	free(popup);
+}
+
+static void xdg_popup_create(struct view *view, struct wlr_xdg_popup *wlr_popup);
+
+static void
+popup_handle_new_xdg_popup(struct wl_listener *listener, void *data)
+{
+	struct xdg_popup *popup = wl_container_of(listener, popup, new_popup);
+	struct wlr_xdg_popup *wlr_popup = data;
+	xdg_popup_create(popup->view, wlr_popup);
+}
+
+/*
+ * We need to pass view to this function for damage tracking.
+ * TODO: Could we just damage surface or whole output?
+ *       That would allow us to only have one 'handle_new_*'
+ */
+static void
+xdg_popup_create(struct view *view, struct wlr_xdg_popup *wlr_popup)
+{
+	struct xdg_popup *popup = calloc(1, sizeof(struct xdg_popup));
+	if (!popup) {
+		return;
+	}
+
+	popup->wlr_popup = wlr_popup;
+	popup->view = view;
+
+	popup->destroy.notify = handle_xdg_popup_destroy;
+	wl_signal_add(&wlr_popup->base->events.destroy, &popup->destroy);
+	popup->commit.notify = handle_xdg_popup_commit;
+	wl_signal_add(&wlr_popup->base->surface->events.commit, &popup->commit);
+	popup->map.notify = handle_xdg_popup_map;
+	wl_signal_add(&wlr_popup->base->events.map, &popup->map);
+	popup->unmap.notify = handle_xdg_popup_unmap;
+	wl_signal_add(&wlr_popup->base->events.unmap, &popup->unmap);
+	popup->new_popup.notify = popup_handle_new_xdg_popup;
+	wl_signal_add(&wlr_popup->base->events.new_popup, &popup->new_popup);
+}
+
+/* This is merely needed to track damage */
+static void
+handle_new_xdg_popup(struct wl_listener *listener, void *data)
+{
+	struct view *view = wl_container_of(listener, view, new_popup);
+	struct wlr_xdg_popup *wlr_popup = data;
+	xdg_popup_create(view, wlr_popup);
+}
+
 static bool
 has_ssd(struct view *view)
 {
@@ -95,6 +175,7 @@ handle_commit(struct wl_listener *listener, void *data)
 			view->pending_move_resize.configure_serial = 0;
 		}
 	}
+	damage_view_part(view);
 }
 
 static void
@@ -165,6 +246,7 @@ xdg_toplevel_view_configure(struct view *view, struct wlr_box geo)
 	} else if (view->pending_move_resize.configure_serial == 0) {
 		view->x = geo.x;
 		view->y = geo.y;
+		damage_all_outputs(view->server);
 	}
 }
 
@@ -173,6 +255,7 @@ xdg_toplevel_view_move(struct view *view, double x, double y)
 {
 	view->x = x;
 	view->y = y;
+	damage_all_outputs(view->server);
 }
 
 static void
@@ -181,6 +264,13 @@ xdg_toplevel_view_close(struct view *view)
 	wlr_xdg_toplevel_send_close(view->xdg_surface);
 }
 
+static void
+xdg_toplevel_view_for_each_popup(struct view *view,
+		wlr_surface_iterator_func_t iterator, void *data)
+{
+	wlr_xdg_surface_for_each_popup(view->xdg_surface, iterator, data);
+}
+
 static void
 xdg_toplevel_view_for_each_surface(struct view *view,
 		wlr_surface_iterator_func_t iterator, void *data)
@@ -234,12 +324,14 @@ xdg_toplevel_view_map(struct view *view)
 	view->commit.notify = handle_commit;
 
 	desktop_focus_view(&view->server->seat, view);
+	damage_all_outputs(view->server);
 }
 
 static void
 xdg_toplevel_view_unmap(struct view *view)
 {
 	view->mapped = false;
+	damage_all_outputs(view->server);
 	wl_list_remove(&view->commit.link);
 	desktop_focus_topmost_mapped_view(view->server);
 }
@@ -247,6 +339,7 @@ xdg_toplevel_view_unmap(struct view *view)
 static const struct view_impl xdg_toplevel_view_impl = {
 	.configure = xdg_toplevel_view_configure,
 	.close = xdg_toplevel_view_close,
+	.for_each_popup = xdg_toplevel_view_for_each_popup,
 	.for_each_surface = xdg_toplevel_view_for_each_surface,
 	.map = xdg_toplevel_view_map,
 	.move = xdg_toplevel_view_move,
@@ -277,6 +370,9 @@ xdg_surface_new(struct wl_listener *listener, void *data)
 	view->destroy.notify = handle_destroy;
 	wl_signal_add(&xdg_surface->events.destroy, &view->destroy);
 
+	view->new_popup.notify = handle_new_xdg_popup;
+	wl_signal_add(&xdg_surface->events.new_popup, &view->new_popup);
+
 	struct wlr_xdg_toplevel *toplevel = xdg_surface->toplevel;
 	view->request_move.notify = handle_request_move;
 	wl_signal_add(&toplevel->events.request_move, &view->request_move);

src/xwayland-unmanaged.c

@@ -19,6 +19,7 @@ unmanaged_handle_commit(struct wl_listener *listener, void *data)
 	struct wlr_xwayland_surface *xsurface = unmanaged->xwayland_surface;
 	unmanaged->lx = xsurface->x;
 	unmanaged->ly = xsurface->y;
+	damage_all_outputs(unmanaged->server);
 }
 
 static void
@@ -36,7 +37,7 @@ unmanaged_handle_map(struct wl_listener *listener, void *data)
 
 	unmanaged->lx = xsurface->x;
 	unmanaged->ly = xsurface->y;
-
+	damage_all_outputs(unmanaged->server);
 	if (wlr_xwayland_or_surface_wants_focus(xsurface)) {
 		seat_focus_surface(&unmanaged->server->seat, xsurface->surface);
 	}
@@ -48,6 +49,7 @@ unmanaged_handle_unmap(struct wl_listener *listener, void *data)
 	struct xwayland_unmanaged *unmanaged =
 		wl_container_of(listener, unmanaged, unmap);
 	struct wlr_xwayland_surface *xsurface = unmanaged->xwayland_surface;
+	damage_all_outputs(unmanaged->server);
 	wl_list_remove(&unmanaged->link);
 	wl_list_remove(&unmanaged->commit.link);
 

src/xwayland.c

@@ -21,6 +21,7 @@ handle_commit(struct wl_listener *listener, void *data)
 			view->pending_move_resize.height - view->h;
 		view->pending_move_resize.update_y = false;
 	}
+	damage_view_whole(view);
 }
 
 static void
@@ -56,6 +57,7 @@ handle_request_configure(struct wl_listener *listener, void *data)
 	struct wlr_xwayland_surface_configure_event *event = data;
 	wlr_xwayland_surface_configure(view->xwayland_surface, event->x,
 				       event->y, event->width, event->height);
+	damage_all_outputs(view->server);
 }
 
 static void
@@ -70,6 +72,7 @@ configure(struct view *view, struct wlr_box geo)
 	wlr_xwayland_surface_configure(view->xwayland_surface, (int16_t)geo.x,
 				       (int16_t)geo.y, (uint16_t)geo.width,
 				       (uint16_t)geo.height);
+	damage_all_outputs(view->server);
 }
 
 static void
@@ -80,18 +83,23 @@ move(struct view *view, double x, double y)
 	struct wlr_xwayland_surface *s = view->xwayland_surface;
 	wlr_xwayland_surface_configure(s, (int16_t)x, (int16_t)y,
 		(uint16_t)s->width, (uint16_t)s->height);
+	damage_all_outputs(view->server);
 }
 
 static void
 _close(struct view *view)
 {
 	wlr_xwayland_surface_close(view->xwayland_surface);
+	damage_all_outputs(view->server);
 }
 
 static void
 for_each_surface(struct view *view, wlr_surface_iterator_func_t iterator,
 		void *data)
 {
+	if (!view->surface) {
+		return;
+	}
         wlr_surface_for_each_surface(view->surface, iterator, data);
 }
 
@@ -139,12 +147,14 @@ map(struct view *view)
 	view->commit.notify = handle_commit;
 
 	desktop_focus_view(&view->server->seat, view);
+	damage_all_outputs(view->server);
 }
 
 static void
 unmap(struct view *view)
 {
 	view->mapped = false;
+	damage_all_outputs(view->server);
 	wl_list_remove(&view->commit.link);
 	desktop_focus_topmost_mapped_view(view->server);
 }