Start port of swaybar to layer shell

This starts up the event loop and wayland display and shims out the
basic top level rendering concepts. Also includes some changes to
incorporate pango into the 1.x codebase properly.

23 files changed, 342 insertions, 3784 deletions

diff --git a/common/meson.build b/common/meson.build
index 01736ca6..4ad47077 100644
--- a/common/meson.build
+++ b/common/meson.build
@@ -1,5 +1,7 @@
 deps = [
 	cairo,
+	pango,
+	pangocairo,
 	wlroots
 ]
 
@@ -14,6 +16,7 @@ lib_sway_common = static_library(
 		'ipc-client.c',
 		'log.c',
 		'list.c',
+		'pango.c',
 		'readline.c',
 		'stringop.c',
 		'util.c'
diff --git a/common/pango.c b/common/pango.c
new file mode 100644
index 00000000..212d96cf
--- /dev/null
+++ b/common/pango.c
@@ -0,0 +1,67 @@
+#include <cairo/cairo.h>
+#include <pango/pangocairo.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+PangoLayout *get_pango_layout(cairo_t *cairo, const char *font,
+		const char *text, int32_t scale, bool markup) {
+	PangoLayout *layout = pango_cairo_create_layout(cairo);
+	PangoAttrList *attrs;
+	if (markup) {
+		char *buf;
+		pango_parse_markup(text, -1, 0, &attrs, &buf, NULL, NULL);
+		pango_layout_set_markup(layout, buf, -1);
+		free(buf);
+	} else {
+		attrs = pango_attr_list_new();
+		pango_layout_set_text(layout, text, -1);
+	}
+	pango_attr_list_insert(attrs, pango_attr_scale_new(scale));
+	PangoFontDescription *desc = pango_font_description_from_string(font);
+	pango_layout_set_font_description(layout, desc);
+	pango_layout_set_single_paragraph_mode(layout, 1);
+	pango_layout_set_attributes(layout, attrs);
+	pango_attr_list_unref(attrs);
+	pango_font_description_free(desc);
+	return layout;
+}
+
+void get_text_size(cairo_t *cairo, const char *font, int *width, int *height,
+		int32_t scale, bool markup, const char *fmt, ...) {
+	char *buf = malloc(2048);
+
+	va_list args;
+	va_start(args, fmt);
+	if (vsnprintf(buf, 2048, fmt, args) >= 2048) {
+		strcpy(buf, "[buffer overflow]");
+	}
+	va_end(args);
+
+	PangoLayout *layout = get_pango_layout(cairo, font, buf, scale, markup);
+	pango_cairo_update_layout(cairo, layout);
+	pango_layout_get_pixel_size(layout, width, height);
+	g_object_unref(layout);
+	free(buf);
+}
+
+void pango_printf(cairo_t *cairo, const char *font,
+		int32_t scale, bool markup, const char *fmt, ...) {
+	char *buf = malloc(2048);
+
+	va_list args;
+	va_start(args, fmt);
+	if (vsnprintf(buf, 2048, fmt, args) >= 2048) {
+		strcpy(buf, "[buffer overflow]");
+	}
+	va_end(args);
+
+	PangoLayout *layout = get_pango_layout(cairo, font, buf, scale, markup);
+	pango_cairo_update_layout(cairo, layout);
+	pango_cairo_show_layout(cairo, layout);
+	g_object_unref(layout);
+	free(buf);
+}
diff --git a/include/pango.h b/include/pango.h
new file mode 100644
index 00000000..f6325f28
--- /dev/null
+++ b/include/pango.h
@@ -0,0 +1,16 @@
+#ifndef _SWAY_PANGO_H
+#define _SWAY_PANGO_H
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <cairo/cairo.h>
+#include <pango/pangocairo.h>
+
+PangoLayout *get_pango_layout(cairo_t *cairo, const char *font,
+		const char *text, int32_t scale, bool markup);
+void get_text_size(cairo_t *cairo, const char *font, int *width, int *height,
+		int32_t scale, bool markup, const char *fmt, ...);
+void pango_printf(cairo_t *cairo, const char *font,
+		int32_t scale, bool markup, const char *fmt, ...);
+
+#endif
diff --git a/include/sway/config.h b/include/sway/config.h
index 48a8b0ab..8c9e04de 100644
--- a/include/sway/config.h
+++ b/include/sway/config.h
@@ -1,17 +1,16 @@
 #ifndef _SWAY_CONFIG_H
 #define _SWAY_CONFIG_H
-
 #define PID_WORKSPACE_TIMEOUT 60
-
 #include <libinput.h>
 #include <stdint.h>
 #include <string.h>
+#include <time.h>
 #include <wlr/types/wlr_box.h>
 #include <xkbcommon/xkbcommon.h>
-#include <time.h>
 #include "list.h"
 #include "layout.h"
 #include "container.h"
+#include "wlr-layer-shell-unstable-v1-protocol.h"
 
 /**
  * Describes a variable created via the `set` command.
@@ -152,7 +151,7 @@ struct bar_config {
 	char *id;
 	uint32_t modifier;
 	list_t *outputs;
-	//enum desktop_shell_panel_position position; // TODO
+	char *position;
 	list_t *bindings;
 	char *status_command;
 	bool pango_markup;
diff --git a/include/swaybar/bar.h b/include/swaybar/bar.h
index 50d36e76..3ae8c0b3 100644
--- a/include/swaybar/bar.h
+++ b/include/swaybar/bar.h
@@ -1,72 +1,45 @@
 #ifndef _SWAYBAR_BAR_H
 #define _SWAYBAR_BAR_H
-
-#include "client/registry.h"
-#include "client/window.h"
+#include <wayland-client.h>
+#include "pool-buffer.h"
 #include "list.h"
 
-struct bar {
-	struct config *config;
-	struct status_line *status;
-	list_t *outputs;
-	struct output *focused_output;
+struct swaybar_config;
+struct swaybar_output;
+struct swaybar_workspace;
+
+struct swaybar {
+	struct wl_display *display;
+	struct wl_compositor *compositor;
+	struct zwlr_layer_shell_v1 *layer_shell;
+	struct wl_shm *shm;
 
-	int ipc_event_socketfd;
-	int ipc_socketfd;
-	int status_read_fd;
-	int status_write_fd;
-	pid_t status_command_pid;
+	struct swaybar_config *config;
+	struct swaybar_output *focused_output;
+
+	struct wl_list outputs;
 };
 
-struct output {
-	struct window *window;
-	struct registry *registry;
-	list_t *workspaces;
-#ifdef ENABLE_TRAY
-	list_t *items;
-#endif
+struct swaybar_output {
+	struct wl_list link;
+	struct swaybar *bar;
+	struct wl_output *output;
+	struct wl_surface *surface;
+	struct zwlr_layer_surface_v1 *layer_surface;
+
 	char *name;
 	int idx;
 	bool focused;
-};
 
-struct workspace {
-	int num;
-	char *name;
-	bool focused;
-	bool visible;
-	bool urgent;
+	uint32_t width, height;
+	struct pool_buffer buffers[2];
+	struct pool_buffer *current_buffer;
 };
 
-/** Global bar state */
-extern struct bar swaybar;
+void bar_setup(struct swaybar *bar,
+		const char *socket_path,
+		const char *bar_id);
+void bar_run(struct swaybar *bar);
+void bar_teardown(struct swaybar *bar);
 
-/** True if sway needs to render */
-extern bool dirty;
-
-/**
- * Setup bar.
- */
-void bar_setup(struct bar *bar, const char *socket_path, const char *bar_id);
-
-/**
- * Create new output struct from name.
- */
-struct output *new_output(const char *name);
-
-/**
- * Bar mainloop.
- */
-void bar_run(struct bar *bar);
-
-/**
- * free workspace list.
- */
-void free_workspaces(list_t *workspaces);
-
-/**
- * Teardown bar.
- */
-void bar_teardown(struct bar *bar);
-
-#endif /* _SWAYBAR_BAR_H */
+#endif
diff --git a/include/swaybar/config.h b/include/swaybar/config.h
index 651f0ee3..1bfe4843 100644
--- a/include/swaybar/config.h
+++ b/include/swaybar/config.h
@@ -1,9 +1,7 @@
 #ifndef _SWAYBAR_CONFIG_H
 #define _SWAYBAR_CONFIG_H
-
-#include <stdint.h>
 #include <stdbool.h>
-
+#include <stdint.h>
 #include "list.h"
 #include "util.h"
 
@@ -19,10 +17,10 @@ struct box_colors {
 /**
  * Swaybar config.
  */
-struct config {
+struct swaybar_config {
 	char *status_command;
 	bool pango_markup;
-	uint32_t position;
+	uint32_t position; // zwlr_layer_surface_v1_anchor
 	char *font;
 	char *sep_symbol;
 	char *mode;
@@ -32,18 +30,6 @@ struct config {
 	bool workspace_buttons;
 	bool all_outputs;
 	list_t *outputs;
-
-#ifdef ENABLE_TRAY
-	// Tray
-	char *tray_output;
-	char *icon_theme;
-
-	uint32_t tray_padding;
-	uint32_t activate_button;
-	uint32_t context_button;
-	uint32_t secondary_button;
-#endif
-
 	int height;
 
 	struct {
@@ -63,24 +49,7 @@ struct config {
 	} colors;
 };
 
-/**
- * Parse position top|bottom|left|right.
- */
-uint32_t parse_position(const char *position);
-
-/**
- * Parse font.
- */
-char *parse_font(const char *font);
-
-/**
- * Initialize default sway config.
- */
-struct config *init_config();
-
-/**
- * Free config struct.
- */
-void free_config(struct config *config);
+struct swaybar_config *init_config();
+void free_config(struct swaybar_config *config);
 
-#endif /* _SWAYBAR_CONFIG_H */
+#endif
diff --git a/include/swaybar/event_loop.h b/include/swaybar/event_loop.h
index a0cde07f..99f6ed36 100644
--- a/include/swaybar/event_loop.h
+++ b/include/swaybar/event_loop.h
@@ -1,6 +1,5 @@
 #ifndef _SWAYBAR_EVENT_LOOP_H
 #define _SWAYBAR_EVENT_LOOP_H
-
 #include <stdbool.h>
 #include <time.h>
 
@@ -23,4 +22,5 @@ bool remove_timer(timer_t timer);
 void event_loop_poll();
 
 void init_event_loop();
-#endif /*_SWAYBAR_EVENT_LOOP_H */
+
+#endif
diff --git a/include/swaybar/ipc.h b/include/swaybar/ipc.h
index c11931d0..57a1b925 100644
--- a/include/swaybar/ipc.h
+++ b/include/swaybar/ipc.h
@@ -1,23 +1,9 @@
 #ifndef _SWAYBAR_IPC_H
 #define _SWAYBAR_IPC_H
+#include "swaybar/bar.h"
 
-#include "bar.h"
-
-/**
- * Initialize ipc connection to sway and get sway state, outputs, bar_config.
- */
-void ipc_bar_init(struct bar *bar, const char *bar_id);
-
-/**
- * Handle ipc event from sway.
- */
-bool handle_ipc_event(struct bar *bar);
-
-
-/**
- * Send workspace command to sway
- */
+void ipc_bar_init(struct swaybar *bar, const char *bar_id);
+bool handle_ipc_event(struct swaybar *bar);
 void ipc_send_workspace_command(const char *workspace_name);
 
-#endif /* _SWAYBAR_IPC_H */
-
+#endif
diff --git a/include/swaybar/render.h b/include/swaybar/render.h
index 114f43f4..071e2298 100644
--- a/include/swaybar/render.h
+++ b/include/swaybar/render.h
@@ -1,22 +1,10 @@
 #ifndef _SWAYBAR_RENDER_H
 #define _SWAYBAR_RENDER_H
 
-#include "config.h"
-#include "bar.h"
+struct swaybar;
+struct swaybar_output;
+struct swaybar_config;
 
-/**
- * Render swaybar.
- */
-void render(struct output *output, struct config *config, struct status_line *line);
+void render_frame(struct swaybar *bar, struct swaybar_output *output);
 
-/**
- * Set window height and modify internal spacing accordingly.
- */
-void set_window_height(struct window *window, int height);
-
-/**
- * Compute the size of a workspace name
- */
-void workspace_button_size(struct window *window, const char *workspace_name, int *width, int *height);
-
-#endif /* _SWAYBAR_RENDER_H */
+#endif
diff --git a/meson.build b/meson.build
index b681f43a..49824b30 100644
--- a/meson.build
+++ b/meson.build
@@ -35,6 +35,7 @@ pixman         = dependency('pixman-1')
 libcap         = dependency('libcap')
 libinput       = dependency('libinput')
 math           = cc.find_library('m')
+rt             = cc.find_library('rt')
 git = find_program('git', required: false)
 a2x = find_program('a2x', required: false)
 
@@ -99,8 +100,10 @@ subdir('protocols')
 subdir('common')
 subdir('sway')
 subdir('swaymsg')
+
 subdir('client')
 subdir('swaybg')
+subdir('swaybar')
 
 config = configuration_data()
 config.set('sysconfdir', join_paths(prefix, sysconfdir))
diff --git a/swaybar/bar.c b/swaybar/bar.c
index f12923a8..e1d594b4 100644
--- a/swaybar/bar.c
+++ b/swaybar/bar.c
@@ -1,390 +1,146 @@
 #define _XOPEN_SOURCE 500
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <signal.h>
 #include <stdlib.h>
-#include <unistd.h>
 #include <string.h>
-#include <fcntl.h>
-#include <errno.h>
 #include <sys/wait.h>
-#include <signal.h>
-#include <poll.h>
-#ifdef __FreeBSD__
-#include <dev/evdev/input-event-codes.h>
-#else
-#include <linux/input-event-codes.h>
-#endif
-#ifdef ENABLE_TRAY
-#include <dbus/dbus.h>
-#include "swaybar/tray/sni_watcher.h"
-#include "swaybar/tray/tray.h"
-#include "swaybar/tray/sni.h"
-#endif
-#include "swaybar/ipc.h"
+#include <unistd.h>
+#include <wayland-client.h>
+#include <wlr/util/log.h>
 #include "swaybar/render.h"
 #include "swaybar/config.h"
-#include "swaybar/status_line.h"
 #include "swaybar/event_loop.h"
 #include "swaybar/bar.h"
-#include "ipc-client.h"
 #include "list.h"
-#include "log.h"
+#include "pango.h"
+#include "pool-buffer.h"
+#include "wlr-layer-shell-unstable-v1-client-protocol.h"
 
-static void bar_init(struct bar *bar) {
+static void bar_init(struct swaybar *bar) {
 	bar->config = init_config();
-	bar->status = init_status_line();
-	bar->outputs = create_list();
+	wl_list_init(&bar->outputs);
 }
 
-static void spawn_status_cmd_proc(struct bar *bar) {
-	if (bar->config->status_command) {
-		int pipe_read_fd[2];
-		int pipe_write_fd[2];
-
-		if (pipe(pipe_read_fd) != 0) {
-			sway_log(L_ERROR, "Unable to create pipes for status_command fork");
-			return;
-		}
-		if (pipe(pipe_write_fd) != 0) {
-			sway_log(L_ERROR, "Unable to create pipe for status_command fork (write)");
-			close(pipe_read_fd[0]);
-			close(pipe_read_fd[1]);
-			return;
-		}
-
-		bar->status_command_pid = fork();
-		if (bar->status_command_pid == 0) {
-			close(pipe_read_fd[0]);
-			dup2(pipe_read_fd[1], STDOUT_FILENO);
-			close(pipe_read_fd[1]);
-			
-			dup2(pipe_write_fd[0], STDIN_FILENO);
-			close(pipe_write_fd[0]);
-			close(pipe_write_fd[1]);
-			
-			char *const cmd[] = {
-				"sh",
-				"-c",
-				bar->config->status_command,
-				NULL,
-			};
-			execvp(cmd[0], cmd);
-			return;
-		}
-
-		close(pipe_read_fd[1]);
-		bar->status_read_fd = pipe_read_fd[0];
-		fcntl(bar->status_read_fd, F_SETFL, O_NONBLOCK);
-		
-		close(pipe_write_fd[0]);
-		bar->status_write_fd = pipe_write_fd[1];
-		fcntl(bar->status_write_fd, F_SETFL, O_NONBLOCK);
-	}
-}
-
-struct output *new_output(const char *name) {
-	struct output *output = malloc(sizeof(struct output));
+struct swaybar_output *new_output(const char *name) {
+	struct swaybar_output *output = malloc(sizeof(struct swaybar_output));
 	output->name = strdup(name);
-	output->window = NULL;
-	output->registry = NULL;
-	output->workspaces = create_list();
-#ifdef ENABLE_TRAY
-	output->items = create_list();
-#endif
 	return output;
 }
 
-static void mouse_button_notify(struct window *window, int x, int y,
-		uint32_t button, uint32_t state_w) {
-	sway_log(L_DEBUG, "Mouse button %d clicked at %d %d %d", button, x, y, state_w);
-	if (!state_w) {
-		return;
-	}
-
-	struct output *clicked_output = NULL;
-	for (int i = 0; i < swaybar.outputs->length; i++) {
-		struct output *output = swaybar.outputs->items[i];
-		if (window == output->window) {
-			clicked_output = output;
-			break;
-		}
-	}
-
-	if (!sway_assert(clicked_output != NULL, "Got pointer event for non-existing output")) {
-		return;
-	}
-
-	double button_x = 0.5;
-	for (int i = 0; i < clicked_output->workspaces->length; i++) {
-		struct workspace *workspace = clicked_output->workspaces->items[i];
-		int button_width, button_height;
-
-		workspace_button_size(window, workspace->name, &button_width, &button_height);
-
-		button_x += button_width;
-		if (x <= button_x) {
-			ipc_send_workspace_command(workspace->name);
-			break;
-		}
-	}
-
-	switch (button) {
-	case BTN_LEFT:
-		status_line_mouse_event(&swaybar, x, y, 1);
-		break;
-	case BTN_MIDDLE:
-		status_line_mouse_event(&swaybar, x, y, 2);
-		break;
-	case BTN_RIGHT:
-		status_line_mouse_event(&swaybar, x, y, 3);
-		break;
-	}
-
-#ifdef ENABLE_TRAY
-	tray_mouse_event(clicked_output, x, y, button, state_w);
-#endif
-
+static void layer_surface_configure(void *data,
+		struct zwlr_layer_surface_v1 *surface,
+		uint32_t serial, uint32_t width, uint32_t height) {
+	struct swaybar_output *output = data;
+	output->width = width;
+	output->height = height;
+	zwlr_layer_surface_v1_ack_configure(surface, serial);
+	render_frame(output->bar, output);
 }
 
-static void mouse_scroll_notify(struct window *window, enum scroll_direction direction) {
-	sway_log(L_DEBUG, "Mouse wheel scrolled %s", direction == SCROLL_UP ? "up" : "down");
-
-	// If there are status blocks and click_events are enabled
-	// check if the position is within the status area and if so
-	// tell the status line to output the event and skip workspace
-	// switching below.
-	int num_blocks = swaybar.status->block_line->length;
-	if (swaybar.status->click_events && num_blocks > 0) {
-		struct status_block *first_block = swaybar.status->block_line->items[0];
-		int x = window->pointer_input.last_x;
-		int y = window->pointer_input.last_y;
-		if (x > first_block->x) {
-			if (direction == SCROLL_UP) {
-				status_line_mouse_event(&swaybar, x, y, 4);
-			} else {
-				status_line_mouse_event(&swaybar, x, y, 5);
-			}
-			return;
-		}
-	}
+static void layer_surface_closed(void *_output,
+		struct zwlr_layer_surface_v1 *surface) {
+	// TODO: Deal with hotplugging
+	struct swaybar_output *output = output;
+	zwlr_layer_surface_v1_destroy(output->layer_surface);
+	wl_surface_destroy(output->surface);
+}
 
-	if (!swaybar.config->wrap_scroll) {
-		// Find output this window lives on
-		int i;
-		struct output *output = NULL;
-		for (i = 0; i < swaybar.outputs->length; ++i) {
-			output = swaybar.outputs->items[i];
-			if (output->window == window) {
-				break;
-			}
-		}
-		if (!sway_assert(i != swaybar.outputs->length, "Unknown window in scroll event")) {
-			return;
-		}
-		int focused = -1;
-		for (i = 0; i < output->workspaces->length; ++i) {
-			struct workspace *ws = output->workspaces->items[i];
-			if (ws->focused) {
-				focused = i;
-				break;
-			}
-		}
-		if (!sway_assert(focused != -1, "Scroll wheel event received on inactive output")) {
-			return;
-		}
-		if ((focused == 0 && direction == SCROLL_UP) ||
-				(focused == output->workspaces->length - 1 && direction == SCROLL_DOWN)) {
-			// Do not wrap
-			return;
-		}
+struct zwlr_layer_surface_v1_listener layer_surface_listener = {
+	.configure = layer_surface_configure,
+	.closed = layer_surface_closed,
+};
+
+static void handle_global(void *data, struct wl_registry *registry,
+		uint32_t name, const char *interface, uint32_t version) {
+	struct swaybar *bar = data;
+	if (strcmp(interface, wl_compositor_interface.name) == 0) {
+		bar->compositor = wl_registry_bind(registry, name,
+				&wl_compositor_interface, 1);
+	} else if (strcmp(interface, wl_shm_interface.name) == 0) {
+		bar->shm = wl_registry_bind(registry, name,
+				&wl_shm_interface, 1);
+	} else if (strcmp(interface, wl_output_interface.name) == 0) {
+		static int idx = 0;
+		struct swaybar_output *output =
+			calloc(1, sizeof(struct swaybar_output));
+		output->bar = bar;
+		output->output = wl_registry_bind(registry, name,
+				&wl_output_interface, 1);
+		output->idx = idx++;
+		wl_list_insert(&bar->outputs, &output->link);
+	} else if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
+		bar->layer_shell = wl_registry_bind(
+				registry, name, &zwlr_layer_shell_v1_interface, 1);
 	}
+}
 
-	const char *workspace_name = direction == SCROLL_UP ? "prev_on_output" : "next_on_output";
-	ipc_send_workspace_command(workspace_name);
+static void handle_global_remove(void *data, struct wl_registry *registry,
+		uint32_t name) {
+	// who cares
 }
 
-void bar_setup(struct bar *bar, const char *socket_path, const char *bar_id) {
-	/* initialize bar with default values */
-	bar_init(bar);
+static const struct wl_registry_listener registry_listener = {
+	.global = handle_global,
+	.global_remove = handle_global_remove,
+};
 
-	/* Initialize event loop lists */
+void bar_setup(struct swaybar *bar,
+		const char *socket_path, const char *bar_id) {
+	bar_init(bar);
 	init_event_loop();
 
-	/* connect to sway ipc */
-	bar->ipc_socketfd = ipc_open_socket(socket_path);
-	bar->ipc_event_socketfd = ipc_open_socket(socket_path);
-
-	ipc_bar_init(bar, bar_id);
-
-	int i;
-	for (i = 0; i < bar->outputs->length; ++i) {
-		struct output *bar_output = bar->outputs->items[i];
-
-		bar_output->registry = registry_poll();
-
-		if (!bar_output->registry->desktop_shell) {
-			sway_abort("swaybar requires the compositor to support the desktop-shell extension.");
-		}
-
-		struct output_state *output = bar_output->registry->outputs->items[bar_output->idx];
-
-		bar_output->window = window_setup(bar_output->registry,
-				output->width / output->scale, 30, output->scale, false);
-		if (!bar_output->window) {
-			sway_abort("Failed to create window.");
-		}
-		desktop_shell_set_panel(bar_output->registry->desktop_shell,
-				output->output, bar_output->window->surface);
-		desktop_shell_set_panel_position(bar_output->registry->desktop_shell,
+	assert(bar->display = wl_display_connect(NULL));
+
+	struct wl_registry *registry = wl_display_get_registry(bar->display);
+	wl_registry_add_listener(registry, &registry_listener, bar);
+	wl_display_roundtrip(bar->display);
+	assert(bar->compositor && bar->layer_shell && bar->shm);
+
+	// TODO: we might not necessarily be meant to do all of the outputs
+	struct swaybar_output *output;
+	wl_list_for_each(output, &bar->outputs, link) {
+		assert(output->surface = wl_compositor_create_surface(bar->compositor));
+		output->layer_surface = zwlr_layer_shell_v1_get_layer_surface(
+				bar->layer_shell, output->surface, output->output,
+				ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM, "panel");
+		assert(output->layer_surface);
+		zwlr_layer_surface_v1_add_listener(output->layer_surface,
+				&layer_surface_listener, output);
+		zwlr_layer_surface_v1_set_anchor(output->layer_surface,
 				bar->config->position);
-
-		window_make_shell(bar_output->window);
-
-		/* set font */
-		bar_output->window->font = bar->config->font;
-
-		/* set mouse event callbacks */
-		bar_output->window->pointer_input.notify_button = mouse_button_notify;
-		bar_output->window->pointer_input.notify_scroll = mouse_scroll_notify;
-
-		/* set window height */
-		set_window_height(bar_output->window, bar->config->height);
+		render_frame(bar, output);
 	}
-	/* spawn status command */
-	spawn_status_cmd_proc(bar);
-
-#ifdef ENABLE_TRAY
-	init_tray(bar);
-#endif
 }
 
-bool dirty = true;
-
-static void respond_ipc(int fd, short mask, void *_bar) {
-	struct bar *bar = (struct bar *)_bar;
-	sway_log(L_DEBUG, "Got IPC event.");
-	dirty = handle_ipc_event(bar);
-}
-
-static void respond_command(int fd, short mask, void *_bar) {
-	struct bar *bar = (struct bar *)_bar;
-	dirty = handle_status_line(bar);
-}
-
-static void respond_output(int fd, short mask, void *_output) {
-	struct output *output = (struct output *)_output;
-	if (wl_display_dispatch(output->registry->display) == -1) {
-		sway_log(L_ERROR, "failed to dispatch wl: %d", errno);
+static void display_in(int fd, short mask, void *_bar) {
+	struct swaybar *bar = (struct swaybar *)_bar;
+	if (wl_display_dispatch(bar->display) == -1) {
+		wlr_log(L_ERROR, "failed to dispatch wl: %d", errno);
 	}
 }
 
-void bar_run(struct bar *bar) {
-	add_event(bar->ipc_event_socketfd, POLLIN, respond_ipc, bar);
-	add_event(bar->status_read_fd, POLLIN, respond_command, bar);
-
-	int i;
-	for (i = 0; i < bar->outputs->length; ++i) {
-		struct output *output = bar->outputs->items[i];
-		add_event(wl_display_get_fd(output->registry->display),
-				POLLIN, respond_output, output);
-	}
-
+void bar_run(struct swaybar *bar) {
+	add_event(wl_display_get_fd(bar->display), POLLIN, display_in, bar);
 	while (1) {
-		if (dirty) {
-			int i;
-			for (i = 0; i < bar->outputs->length; ++i) {
-				struct output *output = bar->outputs->items[i];
-				if (window_prerender(output->window) && output->window->cairo) {
-					render(output, bar->config, bar->status);
-					window_render(output->window);
-					wl_display_flush(output->registry->display);
-				}
-			}
-		}
-
-		dirty = false;
-
 		event_loop_poll();
-#ifdef ENABLE_TRAY
-		dispatch_dbus();
-#endif
 	}
 }
 
-void free_workspaces(list_t *workspaces) {
-	int i;
-	for (i = 0; i < workspaces->length; ++i) {
-		struct workspace *ws = workspaces->items[i];
-		free(ws->name);
-		free(ws);
+static void free_outputs(struct wl_list *list) {
+	struct swaybar_output *output, *tmp;
+	wl_list_for_each_safe(output, tmp, list, link) {
+		wl_list_remove(&output->link);
+		free(output->name);
+		free(output);
 	}
-	list_free(workspaces);
 }
 
-static void free_output(struct output *output) {
-	window_teardown(output->window);
-	if (output->registry) {
-		registry_teardown(output->registry);
-	}
-
-	free(output->name);
-
-	if (output->workspaces) {
-		free_workspaces(output->workspaces);
-	}
-
-	free(output);
-}
-
-static void free_outputs(list_t *outputs) {
-	int i;
-	for (i = 0; i < outputs->length; ++i) {
-		free_output(outputs->items[i]);
-	}
-	list_free(outputs);
-}
-
-static void terminate_status_command(pid_t pid) {
-	if (pid) {
-		// terminate status_command process
-		int ret = kill(pid, SIGTERM);
-		if (ret != 0) {
-			sway_log(L_ERROR, "Unable to terminate status_command [pid: %d]", pid);
-		} else {
-			int status;
-			waitpid(pid, &status, 0);
-		}
-	}
-}
-
-void bar_teardown(struct bar *bar) {
+void bar_teardown(struct swaybar *bar) {
+	free_outputs(&bar->outputs);
 	if (bar->config) {
 		free_config(bar->config);
 	}
-
-	if (bar->outputs) {
-		free_outputs(bar->outputs);
-	}
-
-	if (bar->status) {
-		free_status_line(bar->status);
-	}
-
-	/* close sockets/pipes */
-	if (bar->status_read_fd) {
-		close(bar->status_read_fd);
-	}
-
-	if (bar->status_write_fd) {
-		close(bar->status_write_fd);
-	}
-
-	if (bar->ipc_socketfd) {
-		close(bar->ipc_socketfd);
-	}
-
-	if (bar->ipc_event_socketfd) {
-		close(bar->ipc_event_socketfd);
-	}
-
-	/* terminate status command process */
-	terminate_status_command(bar->status_command_pid);
 }
diff --git a/swaybar/config.c b/swaybar/config.c
index 8fe552f2..0c2b57e0 100644
--- a/swaybar/config.c
+++ b/swaybar/config.c
@@ -1,21 +1,24 @@
 #define _XOPEN_SOURCE 500
 #include <stdlib.h>
 #include <string.h>
-#include "wayland-desktop-shell-client-protocol.h"
-#include "log.h"
 #include "swaybar/config.h"
+#include "wlr-layer-shell-unstable-v1-client-protocol.h"
 
 uint32_t parse_position(const char *position) {
+	uint32_t horiz = ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT |
+		ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
+	uint32_t vert = ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP |
+		ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM;
 	if (strcmp("top", position) == 0) {
-		return DESKTOP_SHELL_PANEL_POSITION_TOP;
+		return ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP | horiz;
 	} else if (strcmp("bottom", position) == 0) {
-		return DESKTOP_SHELL_PANEL_POSITION_BO