wlr_seat: pointer events

3 files changed, 254 insertions, 6 deletions

diff --git a/examples/compositor.c b/examples/compositor.c
index 63041615..7595c729 100644
--- a/examples/compositor.c
+++ b/examples/compositor.c
@@ -17,6 +17,7 @@
 #include <wlr/types/wlr_wl_shell.h>
 #include <wlr/types/wlr_xdg_shell_v6.h>
 #include <wlr/types/wlr_seat.h>
+#include <wlr/types/wlr_input_device.h>
 #include <wlr/types/wlr_data_device_manager.h>
 #include <wlr/types/wlr_gamma_control.h>
 #include "wlr/types/wlr_compositor.h"
@@ -27,6 +28,7 @@
 #include <wlr/util/log.h>
 #include "config.h"
 #include "shared.h"
+#include <assert.h>
 
 // TODO: move to common header?
 int os_create_anonymous_file(off_t size);
@@ -58,6 +60,8 @@ struct sample_state {
 	struct wl_listener cursor_axis;
 
 	struct wl_listener new_xdg_surface_v6;
+
+	struct wlr_xdg_surface_v6 *focused_surface;
 };
 
 struct example_xdg_surface_v6 {
@@ -76,6 +80,25 @@ struct example_xdg_surface_v6 {
 	struct wl_listener request_show_window_menu_listener;
 };
 
+static void example_set_focused_surface(struct sample_state *sample,
+		struct wlr_xdg_surface_v6 *surface) {
+	if (sample->focused_surface == surface) {
+		return;
+	}
+
+	// set activated state of the xdg surfaces
+	struct wlr_xdg_surface_v6 *xdg_surface;
+	struct wlr_xdg_client_v6 *xdg_client;
+	wl_list_for_each(xdg_client, &sample->xdg_shell->clients, link) {
+		wl_list_for_each(xdg_surface, &xdg_client->surfaces, link) {
+			wlr_xdg_toplevel_v6_set_activated(xdg_surface,
+				xdg_surface == surface);
+		}
+	}
+
+	sample->focused_surface = surface;
+}
+
 /*
  * Convert timespec to milliseconds
  */
@@ -307,12 +330,53 @@ static void handle_keyboard_bound(struct wl_listener *listener, void *data) {
 	}
 }
 
+static struct wlr_xdg_surface_v6 *example_xdg_surface_at(
+		struct sample_state *sample, int lx, int ly) {
+	struct wlr_xdg_surface_v6 *xdg_surface;
+	struct wlr_xdg_client_v6 *xdg_client;
+	wl_list_for_each(xdg_client, &sample->xdg_shell->clients, link) {
+		wl_list_for_each(xdg_surface, &xdg_client->surfaces, link) {
+			struct example_xdg_surface_v6 *esurface = xdg_surface->data;
+
+			if (sample->cursor->x >= esurface->position.lx &&
+					sample->cursor->y >= esurface->position.ly &&
+					sample->cursor->x <= esurface->position.lx +
+						xdg_surface->geometry->width &&
+					sample->cursor->y <= esurface->position.ly +
+						xdg_surface->geometry->height) {
+				return xdg_surface;
+			}
+		}
+	}
+
+	return NULL;
+}
+
 static void handle_cursor_motion(struct wl_listener *listener, void *data) {
 	struct sample_state *sample =
 		wl_container_of(listener, sample, cursor_motion);
 	struct wlr_event_pointer_motion *event = data;
+
 	wlr_cursor_move(sample->cursor, event->device, event->delta_x,
 		event->delta_y);
+
+	struct wlr_xdg_surface_v6 *surface =
+		example_xdg_surface_at(sample, sample->cursor->x, sample->cursor->y);
+
+	if (surface) {
+		struct example_xdg_surface_v6 *esurface = surface->data;
+
+		int32_t sx = sample->cursor->x - esurface->position.lx;
+		int32_t sy = sample->cursor->y - esurface->position.ly;
+
+		// TODO z-order
+		wlr_seat_pointer_enter(sample->wl_seat, surface->surface,
+			sx, sy);
+		wlr_seat_pointer_send_motion(sample->wl_seat, event->time_sec,
+			sx, sy);
+	} else {
+		wlr_seat_pointer_clear_focus(sample->wl_seat);
+	}
 }
 
 static void handle_cursor_motion_absolute(struct wl_listener *listener,
@@ -323,6 +387,8 @@ static void handle_cursor_motion_absolute(struct wl_listener *listener,
 
 	wlr_cursor_warp_absolute(sample->cursor, event->device, event->x_mm,
 		event->y_mm);
+
+	// TODO move pointer
 }
 
 static void handle_cursor_axis(struct wl_listener *listener, void *data) {
@@ -333,10 +399,17 @@ static void handle_cursor_axis(struct wl_listener *listener, void *data) {
 }
 
 static void handle_cursor_button(struct wl_listener *listener, void *data) {
-	//struct sample_state *sample =
-	//wl_container_of(listener, sample, cursor_button);
-	//struct wlr_event_pointer_button *event = data;
-	wlr_log(L_DEBUG, "TODO: handle cursor button");
+	struct sample_state *sample =
+	wl_container_of(listener, sample, cursor_button);
+	struct wlr_event_pointer_button *event = data;
+
+	struct wlr_xdg_surface_v6 *surface =
+		example_xdg_surface_at(sample, sample->cursor->x, sample->cursor->y);
+
+	example_set_focused_surface(sample, surface);
+
+	wlr_seat_pointer_send_button(sample->wl_seat, event->time_sec,
+		event->button, event->state);
 }
 
 static void handle_input_add(struct compositor_state *state,
@@ -462,6 +535,7 @@ int main(int argc, char *argv[]) {
 		wlr_gamma_control_manager_create(compositor.display);
 
 	state.wl_seat = wlr_seat_create(compositor.display, "seat0");
+	assert(state.wl_seat);
 	state.keyboard_bound.notify = handle_keyboard_bound;
 	wl_signal_add(&state.wl_seat->events.keyboard_bound, &state.keyboard_bound);
 	wlr_seat_set_capabilities(state.wl_seat, WL_SEAT_CAPABILITY_KEYBOARD
diff --git a/include/wlr/types/wlr_seat.h b/include/wlr/types/wlr_seat.h
index 8459e2bd..2993d693 100644
--- a/include/wlr/types/wlr_seat.h
+++ b/include/wlr/types/wlr_seat.h
@@ -1,5 +1,7 @@
 #ifndef _WLR_TYPES_SEAT_H
 #define _WLR_TYPES_SEAT_H
+#include <wlr/types/wlr_surface.h>
+#include <wlr/types/wlr_input_device.h>
 #include <wayland-server.h>
 
 /**
@@ -19,13 +21,25 @@ struct wlr_seat_handle {
 	struct wl_list link;
 };
 
+struct wlr_seat_pointer_state {
+	struct wlr_seat *wlr_seat;
+	struct wlr_seat_handle *focused_handle;
+	struct wlr_surface *focused_surface;
+
+	struct wl_listener focus_surface_destroy_listener;
+	struct wl_listener focus_resource_destroy_listener;
+};
+
 struct wlr_seat {
 	struct wl_global *wl_global;
+	struct wl_display *display;
 	struct wl_list handles;
 	char *name;
 	uint32_t capabilities;
 	struct wlr_data_device *data_device;
 
+	struct wlr_seat_pointer_state pointer_state;
+
 	struct {
 		struct wl_signal client_bound;
 		struct wl_signal client_unbound;
@@ -62,4 +76,37 @@ void wlr_seat_set_capabilities(struct wlr_seat *wlr_seat,
  */
 void wlr_seat_set_name(struct wlr_seat *wlr_seat, const char *name);
 
+/**
+ * Whether or not the surface has pointer focus
+ */
+bool wlr_seat_pointer_surface_has_focus(struct wlr_seat *wlr_seat,
+		struct wlr_surface *surface);
+
+/**
+ * Send a pointer enter event to the given surface and consider it to be the
+ * focused surface for the pointer. This will send a leave event to the last
+ * surface that was entered. Coordinates for the enter event are surface-local.
+ */
+void wlr_seat_pointer_enter(struct wlr_seat *wlr_seat,
+		struct wlr_surface *surface, int32_t sx, int32_t sy);
+
+/**
+ * Clear the focused surface for the pointer and leave all entered surfaces.
+ */
+void wlr_seat_pointer_clear_focus(struct wlr_seat *wlr_seat);
+
+/**
+ * Send a motion event to the surface with pointer focus. Coordinates for the
+ * motion event are surface-local.
+ */
+void wlr_seat_pointer_send_motion(struct wlr_seat *wlr_seat, uint32_t time,
+		int32_t sx, int32_t sy);
+
+/**
+ * Send a button event to the surface with pointer focus. Coordinates for the
+ * button event are surface-local.
+ */
+void wlr_seat_pointer_send_button(struct wlr_seat *wlr_seat, uint32_t time,
+		uint32_t button, enum wlr_button_state state);
+
 #endif
diff --git a/types/wlr_seat.c b/types/wlr_seat.c
index 2ca287ac..2a0a1dcd 100644
--- a/types/wlr_seat.c
+++ b/types/wlr_seat.c
@@ -4,6 +4,7 @@
 #include <string.h>
 #include <wayland-server.h>
 #include <wlr/types/wlr_seat.h>
+#include <wlr/types/wlr_input_device.h>
 #include <wlr/util/log.h>
 
 static void resource_destroy(struct wl_client *client,
@@ -109,8 +110,12 @@ static void wl_seat_get_touch(struct wl_client *client,
 		handle, &wl_touch_destroy);
 }
 
-static void wl_seat_destroy(struct wl_resource *resource) {
+static void wlr_seat_handle_resource_destroy(struct wl_resource *resource) {
 	struct wlr_seat_handle *handle = wl_resource_get_user_data(resource);
+	if (handle == handle->wlr_seat->pointer_state.focused_handle) {
+		handle->wlr_seat->pointer_state.focused_handle = NULL;
+	}
+
 	if (handle->pointer) {
 		wl_resource_destroy(handle->pointer);
 	}
@@ -150,7 +155,7 @@ static void wl_seat_bind(struct wl_client *wl_client, void *_wlr_seat,
 			wl_client, &wl_seat_interface, version, id);
 	handle->wlr_seat = wlr_seat;
 	wl_resource_set_implementation(handle->wl_resource, &wl_seat_impl,
-		handle, wl_seat_destroy);
+		handle, wlr_seat_handle_resource_destroy);
 	wl_list_insert(&wlr_seat->handles, &handle->link);
 	wl_seat_send_capabilities(handle->wl_resource, wlr_seat->capabilities);
 	wl_signal_emit(&wlr_seat->events.client_bound, handle);
@@ -161,6 +166,9 @@ struct wlr_seat *wlr_seat_create(struct wl_display *display, const char *name) {
 	if (!wlr_seat) {
 		return NULL;
 	}
+
+	wlr_seat->pointer_state.wlr_seat = wlr_seat;
+
 	struct wl_global *wl_global = wl_global_create(display,
 		&wl_seat_interface, 6, wlr_seat, wl_seat_bind);
 	if (!wl_global) {
@@ -168,11 +176,17 @@ struct wlr_seat *wlr_seat_create(struct wl_display *display, const char *name) {
 		return NULL;
 	}
 	wlr_seat->wl_global = wl_global;
+	wlr_seat->display = display;
 	wlr_seat->name = strdup(name);
 	wl_list_init(&wlr_seat->handles);
+
 	wl_signal_init(&wlr_seat->events.client_bound);
 	wl_signal_init(&wlr_seat->events.client_unbound);
 	wl_signal_init(&wlr_seat->events.keyboard_bound);
+
+	wl_list_init(&wlr_seat->pointer_state.focus_resource_destroy_listener.link);
+	wl_list_init(&wlr_seat->pointer_state.focus_surface_destroy_listener.link);
+
 	return wlr_seat;
 }
 
@@ -222,3 +236,116 @@ void wlr_seat_set_name(struct wlr_seat *wlr_seat, const char *name) {
 		wl_seat_send_name(handle->wl_resource, name);
 	}
 }
+
+bool wlr_seat_pointer_surface_has_focus(struct wlr_seat *wlr_seat,
+		struct wlr_surface *surface) {
+	return surface == wlr_seat->pointer_state.focused_surface;
+}
+
+static void handle_pointer_focus_surface_destroyed(
+		struct wl_listener *listener, void *data) {
+	struct wlr_seat_pointer_state *state =
+		wl_container_of(listener, state, focus_surface_destroy_listener);
+
+	state->focused_surface = NULL;
+	wlr_seat_pointer_clear_focus(state->wlr_seat);
+}
+
+static void handle_pointer_focus_resource_destroyed(
+		struct wl_listener *listener, void *data) {
+	struct wlr_seat_pointer_state *state =
+		wl_container_of(listener, state, focus_resource_destroy_listener);
+
+	state->focused_surface = NULL;
+	wlr_seat_pointer_clear_focus(state->wlr_seat);
+}
+
+void wlr_seat_pointer_enter(struct wlr_seat *wlr_seat,
+		struct wlr_surface *surface, int32_t sx, int32_t sy) {
+	assert(wlr_seat);
+
+	if (wlr_seat->pointer_state.focused_surface == surface) {
+		// this surface already got an enter notify
+		return;
+	}
+
+	struct wlr_seat_handle *handle = NULL;
+
+	if (surface) {
+		struct wl_client *client = wl_resource_get_client(surface->resource);
+		handle = wlr_seat_handle_for_client(wlr_seat, client);
+	}
+
+	struct wlr_seat_handle *focused_handle =
+		wlr_seat->pointer_state.focused_handle;
+	struct wlr_surface *focused_surface =
+		wlr_seat->pointer_state.focused_surface;
+
+	// leave the previously entered surface
+	if (focused_handle && focused_surface) {
+		uint32_t serial = wl_display_next_serial(wlr_seat->display);
+		wl_pointer_send_leave(focused_handle->pointer, serial,
+			focused_surface->resource);
+		wl_pointer_send_frame(focused_handle->pointer);
+	}
+
+	// enter the current surface
+	if (handle) {
+		uint32_t serial = wl_display_next_serial(wlr_seat->display);
+		wl_pointer_send_enter(handle->pointer, serial, surface->resource,
+			wl_fixed_from_int(sx), wl_fixed_from_int(sy));
+		wl_pointer_send_frame(handle->pointer);
+	}
+
+	// reinitialize the focus destroy events
+	wl_list_remove(
+		&wlr_seat->pointer_state.focus_surface_destroy_listener.link);
+	wl_list_init(&wlr_seat->pointer_state.focus_surface_destroy_listener.link);
+	wl_list_remove(
+		&wlr_seat->pointer_state.focus_resource_destroy_listener.link);
+	wl_list_init(&wlr_seat->pointer_state.focus_resource_destroy_listener.link);
+	if (surface) {
+		wl_signal_add(&surface->signals.destroy,
+			&wlr_seat->pointer_state.focus_surface_destroy_listener);
+		wl_resource_add_destroy_listener(surface->resource,
+			&wlr_seat->pointer_state.focus_resource_destroy_listener);
+		wlr_seat->pointer_state.focus_resource_destroy_listener.notify =
+			handle_pointer_focus_resource_destroyed;
+		wlr_seat->pointer_state.focus_surface_destroy_listener.notify =
+			handle_pointer_focus_surface_destroyed;
+	}
+
+	wlr_seat->pointer_state.focused_handle = handle;
+	wlr_seat->pointer_state.focused_surface = surface;
+
+	// TODO: send focus change event
+}
+
+void wlr_seat_pointer_clear_focus(struct wlr_seat *wlr_seat) {
+	wlr_seat_pointer_enter(wlr_seat, NULL, 0, 0);
+}
+
+void wlr_seat_pointer_send_motion(struct wlr_seat *wlr_seat, uint32_t time,
+		int32_t sx, int32_t sy) {
+	if (!wlr_seat->pointer_state.focused_handle) {
+		// nobody to send the event to
+		return;
+	}
+
+	wl_pointer_send_motion(wlr_seat->pointer_state.focused_handle->pointer,
+		time, wl_fixed_from_int(sx), wl_fixed_from_int(sy));
+	wl_pointer_send_frame(wlr_seat->pointer_state.focused_handle->pointer);
+}
+
+void wlr_seat_pointer_send_button(struct wlr_seat *wlr_seat, uint32_t time,
+		uint32_t button, enum wlr_button_state state) {
+	if (!wlr_seat->pointer_state.focused_handle) {
+		// nobody to send the event to
+		return;
+	}
+
+	uint32_t serial = wl_display_next_serial(wlr_seat->display);
+	wl_pointer_send_button(wlr_seat->pointer_state.focused_handle->pointer,
+		serial, time, button, state);
+	wl_pointer_send_frame(wlr_seat->pointer_state.focused_handle->pointer);
+}