adds the client example for idle-inhibit

Adds a client example for the idle-inhibit-unsable-v1 protocol.
The client creates a surface and requests an idle inhibitor.
On pointer BTN_LEFT the inhibitor is destroyed if it exists, or
recreated if it was destroyed before.
The surfaces colour is based on the idle-inhibit state.
Green if an inhibitor exists, yellow if it does not.

examples/idle-inhibit.c

@@ -0,0 +1,203 @@
+#include <GLES2/gl2.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wayland-client.h>
+#include <wayland-egl.h>
+#include <wlr/render/egl.h>
+#include "xdg-shell-client-protocol.h"
+#include "idle-inhibit-unstable-v1-client-protocol.h"
+
+#include <linux/input-event-codes.h>
+
+/**
+ * Usage: toplevel-decoration [mode]
+ * Creates a xdg-toplevel supporting decoration negotiation. If `mode` is
+ * specified, the client will prefer this decoration mode.
+ */
+
+static int width = 500, height = 300;
+
+static struct wl_compositor *compositor = NULL;
+static struct wl_seat *seat = NULL;
+static struct xdg_wm_base *wm_base = NULL;
+static struct zwp_idle_inhibit_manager_v1 *idle_inhibit_manager = NULL;
+static struct zwp_idle_inhibitor_v1 *idle_inhibitor = NULL;
+
+struct wlr_egl egl;
+struct wl_egl_window *egl_window;
+struct wlr_egl_surface *egl_surface;
+
+static void draw(void);
+
+static void pointer_handle_button(void *data, struct wl_pointer *pointer, uint32_t serial,
+		uint32_t time, uint32_t button, uint32_t state_w) {
+	struct wl_surface *surface = data;
+
+	if (button == BTN_LEFT && state_w == WL_POINTER_BUTTON_STATE_PRESSED) {
+		if (idle_inhibitor) {
+			zwp_idle_inhibitor_v1_destroy(idle_inhibitor);
+			idle_inhibitor = NULL;
+		} else {
+			idle_inhibitor =
+				zwp_idle_inhibit_manager_v1_create_inhibitor(
+					idle_inhibit_manager,
+					surface);
+		}
+	}
+
+	draw();
+}
+
+static void noop () {}
+
+static const struct wl_pointer_listener pointer_listener = {
+	.enter = noop,
+	.leave = noop,
+	.motion = noop,
+	.button = pointer_handle_button,
+	.axis = noop,
+	.frame = noop,
+	.axis_source = noop,
+	.axis_stop = noop,
+	.axis_discrete = noop,
+};
+
+static void draw(void) {
+	eglMakeCurrent(egl.display, egl_surface, egl_surface, egl.context);
+
+	float color[] = {1.0, 1.0, 0.0, 1.0};
+	if (idle_inhibitor) {
+		color[0] = 0.0;
+	}
+
+	glViewport(0, 0, width, height);
+	glClearColor(color[0], color[1], color[2], 1.0);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	eglSwapBuffers(egl.display, egl_surface);
+}
+
+static void xdg_surface_handle_configure(void *data,
+		struct xdg_surface *xdg_surface, uint32_t serial) {
+	xdg_surface_ack_configure(xdg_surface, serial);
+	wl_egl_window_resize(egl_window, width, height, 0, 0);
+	draw();
+}
+
+static const struct xdg_surface_listener xdg_surface_listener = {
+	.configure = xdg_surface_handle_configure,
+};
+
+static void xdg_toplevel_handle_configure(void *data,
+		struct xdg_toplevel *xdg_toplevel, int32_t w, int32_t h,
+		struct wl_array *states) {
+	width = w;
+	height = h;
+}
+
+static const struct xdg_toplevel_listener xdg_toplevel_listener = {
+	.configure = xdg_toplevel_handle_configure,
+};
+
+// static const struct zxdg_toplevel_decoration_v1_listener decoration_listener = {
+// 	.preferred_mode = decoration_handle_preferred_mode,
+// 	.configure = decoration_handle_configure,
+// };
+
+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, xdg_wm_base_interface.name) == 0) {
+		wm_base = wl_registry_bind(registry, name, &xdg_wm_base_interface, 1);
+	} else if (strcmp(interface, zwp_idle_inhibit_manager_v1_interface.name) == 0) {
+		idle_inhibit_manager = wl_registry_bind(registry, name,
+			&zwp_idle_inhibit_manager_v1_interface, 1);
+	} else if (strcmp(interface, wl_seat_interface.name) == 0) {
+		seat = wl_registry_bind(registry, name, &wl_seat_interface, version);
+	}
+}
+
+static void handle_global_remove(void *data, struct wl_registry *registry,
+		uint32_t name) {
+	// TODO
+}
+
+static const struct wl_registry_listener registry_listener = {
+	.global = handle_global,
+	.global_remove = handle_global_remove,
+};
+
+int main(int argc, char **argv) {
+//	if (argc == 2) {
+//		char *mode = argv[1];
+//		if (strcmp(mode, "client") == 0) {
+//			decoration_mode = ZXDG_TOPLEVEL_DECORATION_V1_MODE_CLIENT;
+//		} else if (strcmp(mode, "server") == 0) {
+//			decoration_mode = ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER;
+//		} else {
+//			fprintf(stderr, "Invalid decoration mode\n");
+//			return EXIT_FAILURE;
+//		}
+//	}
+
+	struct wl_display *display = wl_display_connect(NULL);
+	if (display == NULL) {
+		fprintf(stderr, "Failed to create display\n");
+		return EXIT_FAILURE;
+	}
+
+	struct wl_registry *registry = wl_display_get_registry(display);
+	wl_registry_add_listener(registry, &registry_listener, NULL);
+	wl_display_dispatch(display);
+	wl_display_roundtrip(display);
+
+	if (compositor == NULL) {
+		fprintf(stderr, "wl-compositor not available\n");
+		return EXIT_FAILURE;
+	}
+	if (wm_base == NULL) {
+		fprintf(stderr, "xdg-shell not available\n");
+		return EXIT_FAILURE;
+	}
+	if (idle_inhibit_manager == NULL) {
+		fprintf(stderr, "idle-inhibit not available\n");
+		return EXIT_FAILURE;
+	}
+
+	wlr_egl_init(&egl, EGL_PLATFORM_WAYLAND_EXT, display, NULL,
+		WL_SHM_FORMAT_ARGB8888);
+
+	struct wl_surface *surface = wl_compositor_create_surface(compositor);
+	struct xdg_surface *xdg_surface =
+		xdg_wm_base_get_xdg_surface(wm_base, surface);
+	struct xdg_toplevel *xdg_toplevel = xdg_surface_get_toplevel(xdg_surface);
+
+	idle_inhibitor =
+		zwp_idle_inhibit_manager_v1_create_inhibitor(idle_inhibit_manager,
+		surface);
+
+	struct wl_pointer *pointer = wl_seat_get_pointer(seat);
+	wl_pointer_add_listener(pointer, &pointer_listener, surface);
+
+
+	xdg_surface_add_listener(xdg_surface, &xdg_surface_listener, NULL);
+	xdg_toplevel_add_listener(xdg_toplevel, &xdg_toplevel_listener, NULL);
+
+	wl_surface_commit(surface);
+
+	egl_window = wl_egl_window_create(surface, width, height);
+	egl_surface = wlr_egl_create_surface(&egl, egl_window);
+
+	wl_display_roundtrip(display);
+
+	draw();
+
+	while (wl_display_dispatch(display) != -1) {
+		// No-op
+	}
+
+	return EXIT_SUCCESS;
+}

examples/meson.build

@@ -41,3 +41,10 @@ executable(
 	dependencies: [wayland_client, wlr_protos, wlroots, threads],
 	link_with: lib_shared,
 )
+
+executable(
+	'idle-inhibit',
+	'idle-inhibit.c',
+	dependencies: [wayland_client, wlr_protos, wlroots, threads],
+	link_with: lib_shared,
+)

protocol/meson.build

@@ -33,6 +33,7 @@ protocols = [
 
 client_protocols = [
 	[wl_protocol_dir, 'unstable/xdg-shell/xdg-shell-unstable-v6.xml'],
+	[wl_protocol_dir, 'stable/xdg-shell/xdg-shell.xml'],
 	[wl_protocol_dir, 'unstable/idle-inhibit/idle-inhibit-unstable-v1.xml'],
 	'gamma-control.xml',
 	'gtk-primary-selection.xml',