Merge pull request #783 from swaywm/layer-input

Add pointer input to layer surfaces

6 files changed, 288 insertions, 77 deletions

diff --git a/examples/layer-shell.c b/examples/layer-shell.c
index 70407888..89fa9ea9 100644
--- a/examples/layer-shell.c
+++ b/examples/layer-shell.c
@@ -7,12 +7,17 @@
 #include <time.h>
 #include <unistd.h>
 #include <wayland-client.h>
+#include <wayland-cursor.h>
 #include <wayland-egl.h>
 #include <wlr/render/egl.h>
 #include <wlr/util/log.h>
 #include "wlr-layer-shell-unstable-v1-client-protocol.h"
 
 static struct wl_compositor *compositor = NULL;
+static struct wl_seat *seat = NULL;
+static struct wl_shm *shm = NULL;
+static struct wl_pointer *pointer = NULL;
+//static struct wl_keyboard *keyboard = NULL;
 static struct zwlr_layer_shell_v1 *layer_shell = NULL;
 struct zwlr_layer_surface_v1 *layer_surface;
 static struct wl_output *wl_output = NULL;
@@ -32,6 +37,12 @@ static double alpha = 1.0;
 static bool run_display = true;
 static bool animate = false;
 static double frame = 0;
+static int cur_x = -1, cur_y = -1;
+static int buttons = 0;
+
+struct wl_cursor_theme *cursor_theme;
+struct wl_cursor_image *cursor_image;
+struct wl_surface *cursor_surface;
 
 static struct {
 	struct timespec last_frame;
@@ -62,13 +73,15 @@ static void draw(void) {
 		(ts.tv_nsec - demo.last_frame.tv_nsec) / 1000000;
 	int inc = (demo.dec + 1) % 3;
 
-	demo.color[inc] += ms / 2000.0f;
-	demo.color[demo.dec] -= ms / 2000.0f;
+	if (!buttons) {
+		demo.color[inc] += ms / 2000.0f;
+		demo.color[demo.dec] -= ms / 2000.0f;
 
-	if (demo.color[demo.dec] < 0.0f) {
-		demo.color[inc] = 1.0f;
-		demo.color[demo.dec] = 0.0f;
-		demo.dec = inc;
+		if (demo.color[demo.dec] < 0.0f) {
+			demo.color[inc] = 1.0f;
+			demo.color[demo.dec] = 0.0f;
+			demo.dec = inc;
+		}
 	}
 
 	if (animate) {
@@ -83,9 +96,21 @@ static void draw(void) {
 	}
 
 	glViewport(0, 0, width, height);
-	glClearColor(demo.color[0], demo.color[1], demo.color[2], alpha);
+	if (buttons) {
+		glClearColor(1, 1, 1, alpha);
+	} else {
+		glClearColor(demo.color[0], demo.color[1], demo.color[2], alpha);
+	}
 	glClear(GL_COLOR_BUFFER_BIT);
 
+	if (cur_x != -1 && cur_y != -1) {
+		glEnable(GL_SCISSOR_TEST);
+		glScissor(cur_x, height - cur_y, 5, 5);
+		glClearColor(0, 0, 0, 1);
+		glClear(GL_COLOR_BUFFER_BIT);
+		glDisable(GL_SCISSOR_TEST);
+	}
+
 	frame_callback = wl_surface_frame(wl_surface);
 	wl_callback_add_listener(frame_callback, &frame_listener, NULL);
 
@@ -119,11 +144,102 @@ struct zwlr_layer_surface_v1_listener layer_surface_listener = {
 	.closed = layer_surface_closed,
 };
 
+static void wl_pointer_enter(void *data, struct wl_pointer *wl_pointer,
+		uint32_t serial, struct wl_surface *surface,
+		wl_fixed_t surface_x, wl_fixed_t surface_y) {
+	wl_surface_attach(cursor_surface,
+			wl_cursor_image_get_buffer(cursor_image), 0, 0);
+	wl_pointer_set_cursor(wl_pointer, serial, cursor_surface,
+			cursor_image->hotspot_x, cursor_image->hotspot_y);
+	wl_surface_commit(cursor_surface);
+}
+
+static void wl_pointer_leave(void *data, struct wl_pointer *wl_pointer,
+		uint32_t serial, struct wl_surface *surface) {
+	cur_x = cur_y = -1;
+	buttons = 0;
+}
+
+static void wl_pointer_motion(void *data, struct wl_pointer *wl_pointer,
+		uint32_t time, wl_fixed_t surface_x, wl_fixed_t surface_y) {
+	cur_x = wl_fixed_to_int(surface_x);
+	cur_y = wl_fixed_to_int(surface_y);
+}
+
+static void wl_pointer_button(void *data, struct wl_pointer *wl_pointer,
+		uint32_t serial, uint32_t time, uint32_t button, uint32_t state) {
+	if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
+		buttons++;
+	} else {
+		buttons--;
+	}
+}
+
+static void wl_pointer_axis(void *data, struct wl_pointer *wl_pointer,
+		uint32_t time, uint32_t axis, wl_fixed_t value) {
+	// Who cares
+}
+
+static void wl_pointer_frame(void *data, struct wl_pointer *wl_pointer) {
+	// Who cares
+}
+
+static void wl_pointer_axis_source(void *data, struct wl_pointer *wl_pointer,
+		uint32_t axis_source) {
+	// Who cares
+}
+
+static void wl_pointer_axis_stop(void *data, struct wl_pointer *wl_pointer,
+		uint32_t time, uint32_t axis) {
+	// Who cares
+}
+
+static void wl_pointer_axis_discrete(void *data, struct wl_pointer *wl_pointer,
+		uint32_t axis, int32_t discrete) {
+	// Who cares
+}
+
+struct wl_pointer_listener pointer_listener = {
+	.enter = wl_pointer_enter,
+	.leave = wl_pointer_leave,
+	.motion = wl_pointer_motion,
+	.button = wl_pointer_button,
+	.axis = wl_pointer_axis,
+	.frame = wl_pointer_frame,
+	.axis_source = wl_pointer_axis_source,
+	.axis_stop = wl_pointer_axis_stop,
+	.axis_discrete = wl_pointer_axis_discrete,
+};
+
+static void seat_handle_capabilities(void *data, struct wl_seat *wl_seat,
+		enum wl_seat_capability caps) {
+	if ((caps & WL_SEAT_CAPABILITY_POINTER)) {
+		pointer = wl_seat_get_pointer(wl_seat);
+		wl_pointer_add_listener(pointer, &pointer_listener, NULL);
+	}
+	if ((caps & WL_SEAT_CAPABILITY_KEYBOARD)) {
+		// TODO
+	}
+}
+
+static void seat_handle_name(void *data, struct wl_seat *wl_seat,
+		const char *name) {
+	// Who cares
+}
+
+const struct wl_seat_listener seat_listener = {
+	.capabilities = seat_handle_capabilities,
+	.name = seat_handle_name,
+};
+
 static void handle_global(void *data, struct wl_registry *registry,
 		uint32_t name, const char *interface, uint32_t version) {
 	if (strcmp(interface, "wl_compositor") == 0) {
 		compositor = wl_registry_bind(registry, name,
 				&wl_compositor_interface, 1);
+	} else if (strcmp(interface, wl_shm_interface.name) == 0) {
+		shm = wl_registry_bind(registry, name,
+				&wl_shm_interface, 1);
 	} else if (strcmp(interface, "wl_output") == 0) {
 		if (output == 0 && !wl_output) {
 			wl_output = wl_registry_bind(registry, name,
@@ -131,6 +247,10 @@ static void handle_global(void *data, struct wl_registry *registry,
 		} else {
 			output--;
 		}
+	} else if (strcmp(interface, wl_seat_interface.name) == 0) {
+		seat = wl_registry_bind(registry, name,
+				&wl_seat_interface, 1);
+		wl_seat_add_listener(seat, &seat_listener, NULL);
 	} else if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
 		layer_shell = wl_registry_bind(
 				registry, name, &zwlr_layer_shell_v1_interface, 1);
@@ -250,11 +370,15 @@ int main(int argc, char **argv) {
 	wl_display_roundtrip(display);
 
 	if (compositor == NULL) {
-		fprintf(stderr, "wl-compositor not available\n");
+		fprintf(stderr, "wl_compositor not available\n");
+		return 1;
+	}
+	if (shm == NULL) {
+		fprintf(stderr, "wl_shm not available\n");
 		return 1;
 	}
 	if (layer_shell == NULL) {
-		fprintf(stderr, "layer-shell not available\n");
+		fprintf(stderr, "layer_shell not available\n");
 		return 1;
 	}
 	if (wl_output == NULL) {
@@ -262,6 +386,12 @@ int main(int argc, char **argv) {
 		return 1;
 	}
 
+	assert(cursor_theme = wl_cursor_theme_load(NULL, 16, shm));
+	struct wl_cursor *cursor;
+	assert(cursor = wl_cursor_theme_get_cursor(cursor_theme, "left_ptr"));
+	cursor_image = cursor->images[0];
+	assert(cursor_surface = wl_compositor_create_surface(compositor));
+
 	EGLint attribs[] = { EGL_ALPHA_SIZE, 8, EGL_NONE };
 	wlr_egl_init(&egl, EGL_PLATFORM_WAYLAND_EXT, display,
 			attribs, WL_SHM_FORMAT_ARGB8888);
@@ -294,5 +424,7 @@ int main(int argc, char **argv) {
 	while (wl_display_dispatch(display) != -1 && run_display) {
 		// This space intentionally left blank
 	}
+
+	wl_cursor_theme_destroy(cursor_theme);
 	return 0;
 }
diff --git a/examples/meson.build b/examples/meson.build
index 558af4ac..9e60c37a 100644
--- a/examples/meson.build
+++ b/examples/meson.build
@@ -6,6 +6,7 @@ lib_shared = static_library(
 )
 
 threads = dependency('threads')
+wayland_cursor = dependency('wayland-cursor')
 
 executable('simple', 'simple.c', dependencies: wlroots, link_with: lib_shared)
 executable('pointer', 'pointer.c', dependencies: wlroots, link_with: lib_shared)
@@ -52,5 +53,5 @@ executable(
 executable(
 	'layer-shell',
 	'layer-shell.c',
-	dependencies: [wayland_client, wlr_protos, wlroots]
+	dependencies: [wayland_cursor, wayland_client, wlr_protos, wlroots]
 )
diff --git a/include/rootston/desktop.h b/include/rootston/desktop.h
index 5714aa0a..c1dcad56 100644
--- a/include/rootston/desktop.h
+++ b/include/rootston/desktop.h
@@ -1,6 +1,5 @@
 #ifndef ROOTSTON_DESKTOP_H
 #define ROOTSTON_DESKTOP_H
-
 #include <time.h>
 #include <wayland-server.h>
 #include <wlr/config.h>
@@ -73,8 +72,10 @@ struct roots_desktop *desktop_create(struct roots_server *server,
 void desktop_destroy(struct roots_desktop *desktop);
 struct roots_output *desktop_output_from_wlr_output(
 	struct roots_desktop *desktop, struct wlr_output *output);
-struct roots_view *desktop_view_at(struct roots_desktop *desktop, double lx,
-	double ly, struct wlr_surface **surface, double *sx, double *sy);
+
+struct wlr_surface *desktop_surface_at(struct roots_desktop *desktop,
+		double lx, double ly, double *sx, double *sy,
+		struct roots_view **view);
 
 struct roots_view *view_create(struct roots_desktop *desktop);
 void view_destroy(struct roots_view *view);
diff --git a/include/rootston/output.h b/include/rootston/output.h
index bf152038..f78ee81d 100644
--- a/include/rootston/output.h
+++ b/include/rootston/output.h
@@ -1,6 +1,5 @@
 #ifndef ROOTSTON_OUTPUT_H
 #define ROOTSTON_OUTPUT_H
-
 #include <pixman.h>
 #include <time.h>
 #include <wayland-server.h>
diff --git a/rootston/cursor.c b/rootston/cursor.c
index c794cbce..1ee195c2 100644
--- a/rootston/cursor.c
+++ b/rootston/cursor.c
@@ -10,6 +10,7 @@
 #include <dev/evdev/input-event-codes.h>
 #endif
 #include "rootston/cursor.h"
+#include "rootston/desktop.h"
 #include "rootston/xcursor.h"
 
 struct roots_cursor *roots_cursor_create(struct roots_seat *seat) {
@@ -98,51 +99,59 @@ static void seat_view_deco_button(struct roots_seat_view *view, double sx,
 	}
 }
 
-static void roots_cursor_update_position(struct roots_cursor *cursor,
+static void roots_passthrough_cursor(struct roots_cursor *cursor,
 		uint32_t time) {
-	struct roots_desktop *desktop = cursor->seat->input->server->desktop;
-	struct roots_seat *seat = cursor->seat;
-	struct roots_view *view;
-	struct wlr_surface *surface = NULL;
 	double sx, sy;
-	switch (cursor->mode) {
-	case ROOTS_CURSOR_PASSTHROUGH:
-		view = desktop_view_at(desktop, cursor->cursor->x, cursor->cursor->y,
-			&surface, &sx, &sy);
+	struct roots_view *view = NULL;
+	struct roots_seat *seat = cursor->seat;
+	struct roots_desktop *desktop = seat->input->server->desktop;
+	struct wlr_surface *surface = desktop_surface_at(desktop,
+			cursor->cursor->x, cursor->cursor->y, &sx, &sy, &view);
+	struct wl_client *client = NULL;
+	if (surface) {
+		client = wl_resource_get_client(surface->resource);
+	}
+
+	if (cursor->cursor_client != client) {
+		wlr_xcursor_manager_set_cursor_image(cursor->xcursor_manager,
+			cursor->default_xcursor, cursor->cursor);
+		cursor->cursor_client = client;
+	}
+
+	if (view) {
 		struct roots_seat_view *seat_view =
 			roots_seat_view_from_view(seat, view);
-		if (cursor->pointer_view && (surface || seat_view != cursor->pointer_view)) {
+		if (cursor->pointer_view && (surface ||
+					seat_view != cursor->pointer_view)) {
 			seat_view_deco_leave(cursor->pointer_view);
 			cursor->pointer_view = NULL;
 		}
-		bool set_compositor_cursor = !view && !surface && cursor->cursor_client;
-		if (view && surface) {
-			struct wl_client *view_client =
-				wl_resource_get_client(view->wlr_surface->resource);
-			set_compositor_cursor = view_client != cursor->cursor_client;
-		}
-		if (set_compositor_cursor) {
-			wlr_xcursor_manager_set_cursor_image(cursor->xcursor_manager,
-				cursor->default_xcursor, cursor->cursor);
-			cursor->cursor_client = NULL;
-		}
-		if (view && !surface) {
-			if (seat_view) {
-				cursor->pointer_view = seat_view;
-				seat_view_deco_motion(seat_view, sx, sy);
-			}
-		} if (view && surface) {
-			// motion over a view surface
-			wlr_seat_pointer_notify_enter(seat->seat, surface, sx, sy);
-			wlr_seat_pointer_notify_motion(seat->seat, time, sx, sy);
-		} else {
-			wlr_seat_pointer_clear_focus(seat->seat);
+		if (!surface) {
+			cursor->pointer_view = seat_view;
+			seat_view_deco_motion(seat_view, sx, sy);
 		}
+	}
 
-		struct roots_drag_icon *drag_icon;
-		wl_list_for_each(drag_icon, &seat->drag_icons, link) {
-			roots_drag_icon_update_position(drag_icon);
-		}
+	if (surface) {
+		wlr_seat_pointer_notify_enter(seat->seat, surface, sx, sy);
+		wlr_seat_pointer_notify_motion(seat->seat, time, sx, sy);
+	} else {
+		wlr_seat_pointer_clear_focus(seat->seat);
+	}
+
+	struct roots_drag_icon *drag_icon;
+	wl_list_for_each(drag_icon, &seat->drag_icons, link) {
+		roots_drag_icon_update_position(drag_icon);
+	}
+}
+
+static void roots_cursor_update_position(
+		struct roots_cursor *cursor, uint32_t time) {
+	struct roots_seat *seat = cursor->seat;
+	struct roots_view *view;
+	switch (cursor->mode) {
+	case ROOTS_CURSOR_PASSTHROUGH:
+		roots_passthrough_cursor(cursor, time);
 		break;
 	case ROOTS_CURSOR_MOVE:
 		view = roots_seat_get_focus(seat);
@@ -180,15 +189,9 @@ static void roots_cursor_update_position(struct roots_cursor *cursor,
 			} else if (cursor->resize_edges & WLR_EDGE_RIGHT) {
 				width += dx;
 			}
-
-			if (width < 1) {
-				width = 1;
-			}
-			if (height < 1) {
-				height = 1;
-			}
-
-			view_move_resize(view, x, y, width, height);
+			view_move_resize(view, x, y,
+					width < 1 ? 1 : width,
+					height < 1 ? 1 : height);
 		}
 		break;
 	case ROOTS_CURSOR_ROTATE:
@@ -214,15 +217,15 @@ static void roots_cursor_press_button(struct roots_cursor *cursor,
 		uint32_t state, double lx, double ly) {
 	struct roots_seat *seat = cursor->seat;
 	struct roots_desktop *desktop = seat->input->server->desktop;
+
 	bool is_touch = device->type == WLR_INPUT_DEVICE_TOUCH;
 
-	struct wlr_surface *surface = NULL;
 	double sx, sy;
-	struct roots_view *view =
-		desktop_view_at(desktop, lx, ly, &surface, &sx, &sy);
+	struct roots_view *view;
+	struct wlr_surface *surface = desktop_surface_at(desktop,
+			lx, ly, &sx, &sy, &view);
 
-	if (state == WLR_BUTTON_PRESSED &&
-			view &&
+	if (state == WLR_BUTTON_PRESSED && view &&
 			roots_seat_has_meta_pressed(seat)) {
 		roots_seat_set_focus(seat, view);
 
@@ -250,11 +253,9 @@ static void roots_cursor_press_button(struct roots_cursor *cursor,
 			break;
 		}
 	} else {
-
-		if (view && !surface) {
-			if (cursor->pointer_view) {
-				seat_view_deco_button(cursor->pointer_view, sx, sy, button, state);
-			}
+		if (view && !surface && cursor->pointer_view) {
+			seat_view_deco_button(cursor->pointer_view,
+					sx, sy, button, state);
 		}
 
 		if (state == WLR_BUTTON_RELEASED &&
@@ -308,7 +309,6 @@ void roots_cursor_handle_axis(struct roots_cursor *cursor,
 void roots_cursor_handle_touch_down(struct roots_cursor *cursor,
 		struct wlr_event_touch_down *event) {
 	struct roots_desktop *desktop = cursor->seat->input->server->desktop;
-	struct wlr_surface *surface = NULL;
 	double lx, ly;
 	bool result = wlr_cursor_absolute_to_layout_coords(cursor->cursor,
 			event->device, event->x, event->y, &lx, &ly);
@@ -316,7 +316,8 @@ void roots_cursor_handle_touch_down(struct roots_cursor *cursor,
 		return;
 	}
 	double sx, sy;
-	desktop_view_at(desktop, lx, ly, &surface, &sx, &sy);
+	struct wlr_surface *surface = desktop_surface_at(
+			desktop, lx, ly, &sx, &sy, NULL);
 
 	uint32_t serial = 0;
 	if (surface) {
@@ -359,17 +360,16 @@ void roots_cursor_handle_touch_motion(struct roots_cursor *cursor,
 		return;
 	}
 
-	struct wlr_surface *surface = NULL;
 	double lx, ly;
-	bool result =
-		wlr_cursor_absolute_to_layout_coords(cursor->cursor,
+	bool result = wlr_cursor_absolute_to_layout_coords(cursor->cursor,
 			event->device, event->x, event->y, &lx, &ly);
 	if (!result) {
 		return;
 	}
 
 	double sx, sy;
-	desktop_view_at(desktop, lx, ly, &surface, &sx, &sy);
+	struct wlr_surface *surface = desktop_surface_at(
+			desktop, lx, ly, &sx, &sy, NULL);
 
 	if (surface) {
 		wlr_seat_touch_point_focus(cursor->seat->seat, surface,
diff --git a/rootston/desktop.c b/rootston/desktop.c
index 15e0e336..7ee2c69a 100644
--- a/rootston/desktop.c
+++ b/rootston/desktop.c
@@ -20,10 +20,12 @@
 #include <wlr/types/wlr_xdg_shell_v6.h>
 #include <wlr/types/wlr_xdg_shell.h>
 #include <wlr/util/log.h>
+#include "rootston/layers.h"
 #include "rootston/seat.h"
 #include "rootston/server.h"
 #include "rootston/view.h"
 #include "rootston/xcursor.h"
+#include "wlr-layer-shell-unstable-v1-protocol.h"
 
 struct roots_view *view_create(struct roots_desktop *desktop) {
 	struct roots_view *view = calloc(1, sizeof(struct roots_view));
@@ -632,8 +634,9 @@ static bool view_at(struct roots_view *view, double lx, double ly,
 	return false;
 }
 
-struct roots_view *desktop_view_at(struct roots_desktop *desktop, double lx,
-		double ly, struct wlr_surface **surface, double *sx, double *sy) {
+static struct roots_view *desktop_view_at(struct roots_desktop *desktop,
+		double lx, double ly, struct wlr_surface **surface,
+		double *sx, double *sy) {
 	struct wlr_output *wlr_output =
 		wlr_output_layout_output_at(desktop->layout, lx, ly);
 	if (wlr_output != NULL) {
@@ -657,6 +660,81 @@ struct roots_view *desktop_view_at(struct roots_desktop *desktop, double lx,
 	return NULL;
 }
 
+static struct wlr_surface *layer_surface_at(struct roots_output *output,
+		struct wl_list *layer, double ox, double oy, double *sx, double *sy) {
+	struct roots_layer_surface *roots_surface;
+	wl_list_for_each_reverse(roots_surface, layer, link) {
+		struct wlr_surface *wlr_surface =
+			roots_surface->layer_surface->surface;
+		double _sx = ox - roots_surface->geo.x;
+		double _sy = oy - roots_surface->geo.y;
+		struct wlr_box box = {
+			.x = roots_surface->geo.x,
+			.y = roots_surface->geo.y,
+			.width = wlr_surface->current->width,
+			.height = wlr_surface->current->height,
+		};
+		// TODO: Test popups/subsurfaces
+		if (wlr_box_contains_point(&box, ox, oy) &&
+				pixman_region32_contains_point(&wlr_surface->current->input,
+					_sx, _sy, NULL)) {
+			*sx = _sx;
+			*sy = _sy;
+			return wlr_surface;
+		}
+	}
+	return NULL;
+}
+
+struct wlr_surface *desktop_surface_at(struct roots_desktop *desktop,
+		double lx, double ly, double *sx, double *sy,
+		struct roots_view **view) {
+	struct wlr_surface *surface = NULL;
+	struct wlr_output *wlr_output =
+		wlr_output_layout_output_at(desktop->layout, lx, ly);
+	struct roots_output *roots_output;
+	double ox = lx, oy = ly;
+	*view = NULL;
+
+	if (wlr_output) {
+		roots_output = wlr_output->data;
+		wlr_output_layout_output_coords(desktop->layout, wlr_output, &ox, &oy);
+
+		if ((surface = layer_surface_at(roots_output,
+					&roots_output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY],
+					ox, oy, sx, sy))) {
+			return surface;
+		}
+		if ((surface = layer_surface_at(roots_output,
+					&roots_output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP],
+					ox, oy, sx, sy))) {
+			return surface;
+		}
+	}
+
+	struct roots_view *_view;
+	if ((_view = desktop_view_at(desktop, lx, ly, &surface, sx, sy))) {
+		if (view) {
+			*view = _view;
+		}
+		return surface;
+	}
+
+	if (wlr_output) {
+		if ((surface = layer_surface_at(roots_output,
+					&roots_output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM],
+					ox, oy, sx, sy))) {
+			return surface;
+		}
+		if ((surface = layer_surface_at(roots_output,
+					&roots_output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND],
+					ox, oy, sx, sy))) {
+			return surface;
+		}
+	}
+	return NULL;
+}
+
 static void handle_layout_change(struct wl_listener *listener, void *data) {
 	struct roots_desktop *desktop =
 		wl_container_of(listener, desktop, layout_change);