nixos-config/home/config-files/dwl/patches/bar.patch

From 45e6f0f6d45342f41344ae035990306785175bed Mon Sep 17 00:00:00 2001
From: sewn <sewn@disroot.org>
Date: Wed, 26 Jun 2024 23:07:14 +0300
Subject: [PATCH] Implement dwm bar clone

---
 LICENSE      |   3 +-
 LICENSE.drwl |  21 +++
 Makefile     |   2 +-
 config.def.h |  31 ++--
 drwl.h       | 284 +++++++++++++++++++++++++++++++++++++
 dwl.c        | 391 ++++++++++++++++++++++++++++++++++++++++-----------
 6 files changed, 641 insertions(+), 91 deletions(-)
 create mode 100644 LICENSE.drwl
 create mode 100644 drwl.h

diff --git a/LICENSE b/LICENSE
index 658085a..2c269b2 100644
--- a/LICENSE
+++ b/LICENSE
@@ -2,7 +2,8 @@ dwl - dwm for Wayland
 
 Copyright © 2020 dwl team
 
-See also the files LICENSE.tinywl, LICENSE.dwm and LICENSE.sway.
+See also the files LICENSE.tinywl, LICENSE.dwm, LICENSE.sway, and
+LICENSE.drwl.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/LICENSE.drwl b/LICENSE.drwl
new file mode 100644
index 0000000..4754b85
--- /dev/null
+++ b/LICENSE.drwl
@@ -0,0 +1,21 @@
+Copyright (c) 2023-2024 sewn <sewn@disroot.org>
+Copyright (c) 2015 Eric Pruitt <eric.pruitt@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/Makefile b/Makefile
index 9308656..eb5c9d8 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@ DWLDEVCFLAGS = -g -pedantic -Wall -Wextra -Wdeclaration-after-statement \
 	-Wfloat-conversion
 
 # CFLAGS / LDFLAGS
-PKGS      = wlroots wayland-server xkbcommon libinput $(XLIBS)
+PKGS      = wlroots wayland-server xkbcommon libinput pixman-1 fcft $(XLIBS)
 DWLCFLAGS = `$(PKG_CONFIG) --cflags $(PKGS)` $(DWLCPPFLAGS) $(DWLDEVCFLAGS) $(CFLAGS)
 LDLIBS    = `$(PKG_CONFIG) --libs $(PKGS)` $(LIBS)
 
diff --git a/config.def.h b/config.def.h
index 646a3d6..6024b7e 100644
--- a/config.def.h
+++ b/config.def.h
@@ -7,15 +7,21 @@
 static const int sloppyfocus               = 1;  /* focus follows mouse */
 static const int bypass_surface_visibility = 0;  /* 1 means idle inhibitors will disable idle tracking even if it's surface isn't visible  */
 static const unsigned int borderpx         = 1;  /* border pixel of windows */
-static const float rootcolor[]             = COLOR(0x222222ff);
-static const float bordercolor[]           = COLOR(0x444444ff);
-static const float focuscolor[]            = COLOR(0x005577ff);
-static const float urgentcolor[]           = COLOR(0xff0000ff);
+static const int showbar                   = 1; /* 0 means no bar */
+static const int topbar                    = 1; /* 0 means bottom bar */
+static const char *fonts[]                 = {"monospace:size=10"};
+static const float rootcolor[]             = COLOR(0x000000ff);
 /* This conforms to the xdg-protocol. Set the alpha to zero to restore the old behavior */
 static const float fullscreen_bg[]         = {0.1f, 0.1f, 0.1f, 1.0f}; /* You can also use glsl colors */
+static uint32_t colors[][3]                = {
+	/*               fg          bg          border    */
+	[SchemeNorm] = { 0xbbbbbbff, 0x222222ff, 0x444444ff },
+	[SchemeSel]  = { 0xeeeeeeff, 0x005577ff, 0x005577ff },
+	[SchemeUrg]  = { 0,          0,          0x770000ff },
+};
 
 /* tagging - TAGCOUNT must be no greater than 31 */
-#define TAGCOUNT (9)
+static char *tags[] = { "1", "2", "3", "4", "5", "6", "7", "8", "9" };
 
 /* logging */
 static int log_level = WLR_ERROR;
@@ -126,6 +132,7 @@ static const Key keys[] = {
 	/* modifier                  key                 function        argument */
 	{ MODKEY,                    XKB_KEY_p,          spawn,          {.v = menucmd} },
 	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_Return,     spawn,          {.v = termcmd} },
+	{ MODKEY,                    XKB_KEY_b,          togglebar,      {0} },
 	{ MODKEY,                    XKB_KEY_j,          focusstack,     {.i = +1} },
 	{ MODKEY,                    XKB_KEY_k,          focusstack,     {.i = -1} },
 	{ MODKEY,                    XKB_KEY_i,          incnmaster,     {.i = +1} },
@@ -169,7 +176,15 @@ static const Key keys[] = {
 };
 
 static const Button buttons[] = {
-	{ MODKEY, BTN_LEFT,   moveresize,     {.ui = CurMove} },
-	{ MODKEY, BTN_MIDDLE, togglefloating, {0} },
-	{ MODKEY, BTN_RIGHT,  moveresize,     {.ui = CurResize} },
+	{ ClkLtSymbol, 0,      BTN_LEFT,   setlayout,      {.v = &layouts[0]} },
+	{ ClkLtSymbol, 0,      BTN_RIGHT,  setlayout,      {.v = &layouts[2]} },
+	{ ClkTitle,    0,      BTN_MIDDLE, zoom,           {0} },
+	{ ClkStatus,   0,      BTN_MIDDLE, spawn,          {.v = termcmd} },
+	{ ClkClient,   MODKEY, BTN_LEFT,   moveresize,     {.ui = CurMove} },
+	{ ClkClient,   MODKEY, BTN_MIDDLE, togglefloating, {0} },
+	{ ClkClient,   MODKEY, BTN_RIGHT,  moveresize,     {.ui = CurResize} },
+	{ ClkTagBar,   0,      BTN_LEFT,   view,           {0} },
+	{ ClkTagBar,   0,      BTN_RIGHT,  toggleview,     {0} },
+	{ ClkTagBar,   MODKEY, BTN_LEFT,   tag,            {0} },
+	{ ClkTagBar,   MODKEY, BTN_RIGHT,  toggletag,      {0} },
 };
diff --git a/drwl.h b/drwl.h
new file mode 100644
index 0000000..afcb2bd
--- /dev/null
+++ b/drwl.h
@@ -0,0 +1,284 @@
+/*
+ * drwl - https://codeberg.org/sewn/drwl
+ * See LICENSE.drwl file for copyright and license details.
+ */
+#pragma once
+
+#include <stdlib.h>
+#include <fcft/fcft.h>
+#include <pixman-1/pixman.h>
+
+#define BETWEEN(X, A, B) ((A) <= (X) && (X) <= (B))
+
+enum { ColFg, ColBg, ColBorder }; /* colorscheme index */
+
+typedef struct {
+	pixman_image_t *pix;
+	struct fcft_font *font;
+	uint32_t *scheme;
+} Drwl;
+
+#define UTF_INVALID 0xFFFD
+#define UTF_SIZ     4
+
+static const unsigned char utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
+static const unsigned char utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
+static const uint32_t utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
+static const uint32_t utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
+
+static inline uint32_t
+utf8decodebyte(const char c, size_t *i)
+{
+	for (*i = 0; *i < (UTF_SIZ + 1); ++(*i))
+		if (((unsigned char)c & utfmask[*i]) == utfbyte[*i])
+			return (unsigned char)c & ~utfmask[*i];
+	return 0;
+}
+
+static inline size_t
+utf8decode(const char *c, uint32_t *u)
+{
+	size_t i, j, len, type;
+	uint32_t udecoded;
+
+	*u = UTF_INVALID;
+	udecoded = utf8decodebyte(c[0], &len);
+	if (!BETWEEN(len, 1, UTF_SIZ))
+		return 1;
+	for (i = 1, j = 1; i < UTF_SIZ && j < len; ++i, ++j) {
+		udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
+		if (type)
+			return j;
+	}
+	if (j < len)
+		return 0;
+	*u = udecoded;
+	if (!BETWEEN(*u, utfmin[len], utfmax[len]) || BETWEEN(*u, 0xD800, 0xDFFF))
+		*u = UTF_INVALID;
+	for (i = 1; *u > utfmax[i]; ++i)
+		;
+	return len;
+}
+
+static int
+drwl_init(void)
+{
+	fcft_set_scaling_filter(FCFT_SCALING_FILTER_LANCZOS3);
+	return fcft_init(FCFT_LOG_COLORIZE_AUTO, 0, FCFT_LOG_CLASS_ERROR);
+}
+
+static Drwl *
+drwl_create(void)
+{
+	Drwl *drwl;
+	
+	if (!(drwl = calloc(1, sizeof(Drwl))))
+		return NULL;
+
+	return drwl;
+}
+
+static void
+drwl_setfont(Drwl *drwl, struct fcft_font *font)
+{
+	if (drwl)
+		drwl->font = font;
+}
+
+static struct fcft_font *
+drwl_load_font(Drwl *drwl, size_t fontcount,
+		const char *fonts[static fontcount], const char *attributes)
+{
+	struct fcft_font *font = fcft_from_name(fontcount, fonts, attributes);
+	if (drwl)
+		drwl_setfont(drwl, font);
+	return font;
+}
+
+static void
+drwl_destroy_font(struct fcft_font *font)
+{
+	fcft_destroy(font);
+}
+
+static inline pixman_color_t
+convert_color(uint32_t clr)
+{
+	return (pixman_color_t){
+		((clr >> 24) & 0xFF) * 0x101,
+		((clr >> 16) & 0xFF) * 0x101,
+		((clr >> 8) & 0xFF) * 0x101,
+		(clr & 0xFF) * 0x101
+	};
+}
+
+static void
+drwl_setscheme(Drwl *drwl, uint32_t *scm)
+{
+	if (drwl)
+		drwl->scheme = scm;
+}
+
+static inline int
+drwl_stride(unsigned int width)
+{
+	return (((PIXMAN_FORMAT_BPP(PIXMAN_a8r8g8b8) * width + 7) / 8 + 4 - 1) & -4);
+}
+
+static void
+drwl_prepare_drawing(Drwl *drwl, unsigned int w, unsigned int h,
+		uint32_t *bits, int stride)
+{
+	pixman_region32_t clip;
+
+	if (!drwl)
+		return;
+
+	drwl->pix = pixman_image_create_bits_no_clear(
+		PIXMAN_a8r8g8b8, w, h, bits, stride);
+	pixman_region32_init_rect(&clip, 0, 0, w, h);
+	pixman_image_set_clip_region32(drwl->pix, &clip);
+	pixman_region32_fini(&clip);
+}
+
+static void
+drwl_rect(Drwl *drwl,
+		int x, int y, unsigned int w, unsigned int h,
+		int filled, int invert)
+{
+	pixman_color_t clr;
+	if (!drwl || !drwl->scheme || !drwl->pix)
+		return;
+
+	clr = convert_color(drwl->scheme[invert ? ColBg : ColFg]);
+	if (filled)
+		pixman_image_fill_rectangles(PIXMAN_OP_SRC, drwl->pix, &clr, 1,
+			&(pixman_rectangle16_t){x, y, w, h});
+	else
+		pixman_image_fill_rectangles(PIXMAN_OP_SRC, drwl->pix, &clr, 4,
+			(pixman_rectangle16_t[4]){
+				{ x,         y,         w, 1 },
+				{ x,         y + h - 1, w, 1 },
+				{ x,         y,         1, h },
+				{ x + w - 1, y,         1, h }});
+}
+
+static int
+drwl_text(Drwl *drwl,
+		int x, int y, unsigned int w, unsigned int h,
+		unsigned int lpad, const char *text, int invert)
+{
+	int ty;
+	int utf8charlen, render = x || y || w || h;
+	long x_kern;
+	uint32_t cp = 0, last_cp = 0;
+	pixman_color_t clr;
+	pixman_image_t *fg_pix = NULL;
+	int noellipsis = 0;
+	const struct fcft_glyph *glyph, *eg;
+	int fcft_subpixel_mode = FCFT_SUBPIXEL_DEFAULT;
+
+	if (!drwl || (render && (!drwl->scheme || !w || !drwl->pix)) || !text || !drwl->font)
+		return 0;
+
+	if (!render) {
+		w = invert ? invert : ~invert;
+	} else {
+		clr = convert_color(drwl->scheme[invert ? ColBg : ColFg]);
+		fg_pix = pixman_image_create_solid_fill(&clr);
+
+		drwl_rect(drwl, x, y, w, h, 1, !invert);
+
+		x += lpad;
+		w -= lpad;
+	}
+
+	if (render && (drwl->scheme[ColBg] & 0xFF) != 0xFF)
+		fcft_subpixel_mode = FCFT_SUBPIXEL_NONE;
+
+	// U+2026 == …
+	eg = fcft_rasterize_char_utf32(drwl->font, 0x2026, fcft_subpixel_mode);
+
+	while (*text) {
+		utf8charlen = utf8decode(text, &cp);
+
+		glyph = fcft_rasterize_char_utf32(drwl->font, cp, fcft_subpixel_mode);
+		if (!glyph)
+			continue;
+
+		x_kern = 0;
+		if (last_cp)
+			fcft_kerning(drwl->font, last_cp, cp, &x_kern, NULL);
+		last_cp = cp;
+
+		ty = y + (h - drwl->font->height) / 2 + drwl->font->ascent;
+
+		/* draw ellipsis if remaining text doesn't fit */
+		if (!noellipsis && x_kern + glyph->advance.x + eg->advance.x > w && *(text + 1) != '\0') {
+			if (drwl_text(drwl, 0, 0, 0, 0, 0, text, 0)
+					- glyph->advance.x < eg->advance.x) {
+				noellipsis = 1;
+			} else {
+				w -= eg->advance.x;
+				pixman_image_composite32(
+					PIXMAN_OP_OVER, fg_pix, eg->pix, drwl->pix, 0, 0, 0, 0,
+					x + eg->x, ty - eg->y, eg->width, eg->height);
+			}
+		}
+
+		if ((x_kern + glyph->advance.x) > w)
+			break;
+
+		x += x_kern;
+
+		if (render && pixman_image_get_format(glyph->pix) == PIXMAN_a8r8g8b8)
+			// pre-rendered glyphs (eg. emoji)
+			pixman_image_composite32(
+				PIXMAN_OP_OVER, glyph->pix, NULL, drwl->pix, 0, 0, 0, 0,
+				x + glyph->x, ty - glyph->y, glyph->width, glyph->height);
+		else if (render)
+			pixman_image_composite32(
+				PIXMAN_OP_OVER, fg_pix, glyph->pix, drwl->pix, 0, 0, 0, 0,
+				x + glyph->x, ty - glyph->y, glyph->width, glyph->height);
+
+		text += utf8charlen;
+		x += glyph->advance.x;
+		w -= glyph->advance.x;
+	}
+
+	if (render)
+		pixman_image_unref(fg_pix);
+
+	return x + (render ? w : 0);
+}
+
+static unsigned int
+drwl_font_getwidth(Drwl *drwl, const char *text)
+{
+	if (!drwl || !drwl->font || !text)
+		return 0;
+	return drwl_text(drwl, 0, 0, 0, 0, 0, text, 0);
+}
+
+static void
+drwl_finish_drawing(Drwl *drwl)
+{
+	if (drwl && drwl->pix)
+		pixman_image_unref(drwl->pix);
+}
+
+static void
+drwl_destroy(Drwl *drwl)
+{
+	if (drwl->pix)
+		pixman_image_unref(drwl->pix);
+	if (drwl->font)
+		drwl_destroy_font(drwl->font);
+	free(drwl);
+}
+
+static void
+drwl_fini(void)
+{
+	fcft_fini();
+}
diff --git a/dwl.c b/dwl.c
index 9fb50a7..9fdddc7 100644
--- a/dwl.c
+++ b/dwl.c
@@ -4,6 +4,7 @@
 #include <getopt.h>
 #include <libinput.h>
 #include <linux/input-event-codes.h>
+#include <libdrm/drm_fourcc.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -56,6 +57,7 @@
 #include <wlr/types/wlr_xdg_decoration_v1.h>
 #include <wlr/types/wlr_xdg_output_v1.h>
 #include <wlr/types/wlr_xdg_shell.h>
+#include <wlr/interfaces/wlr_buffer.h>
 #include <wlr/util/log.h>
 #include <wlr/util/region.h>
 #include <xkbcommon/xkbcommon.h>
@@ -66,6 +68,7 @@
 #endif
 
 #include "util.h"
+#include "drwl.h"
 
 /* macros */
 #define MAX(A, B)               ((A) > (B) ? (A) : (B))
@@ -76,14 +79,17 @@
 #define VISIBLEON(C, M)         ((M) && (C)->mon == (M) && ((C)->tags & (M)->tagset[(M)->seltags]))
 #define LENGTH(X)               (sizeof X / sizeof X[0])
 #define END(A)                  ((A) + LENGTH(A))
-#define TAGMASK                 ((1u << TAGCOUNT) - 1)
+#define TAGMASK                 ((1u << LENGTH(tags)) - 1)
 #define LISTEN(E, L, H)         wl_signal_add((E), ((L)->notify = (H), (L)))
 #define LISTEN_STATIC(E, H)     do { static struct wl_listener _l = {.notify = (H)}; wl_signal_add((E), &_l); } while (0)
+#define TEXTW(mon, text)        (drwl_font_getwidth(mon->drw, text) + mon->lrpad)
 
 /* enums */
+enum { SchemeNorm, SchemeSel, SchemeUrg }; /* color schemes */
 enum { CurNormal, CurPressed, CurMove, CurResize }; /* cursor */
 enum { XDGShell, LayerShell, X11 }; /* client types */
 enum { LyrBg, LyrBottom, LyrTile, LyrFloat, LyrTop, LyrFS, LyrOverlay, LyrBlock, NUM_LAYERS }; /* scene layers */
+enum { ClkTagBar, ClkLtSymbol, ClkStatus, ClkTitle, ClkClient, ClkRoot }; /* clicks */
 #ifdef XWAYLAND
 enum { NetWMWindowTypeDialog, NetWMWindowTypeSplash, NetWMWindowTypeToolbar,
 	NetWMWindowTypeUtility, NetLast }; /* EWMH atoms */
@@ -97,6 +103,7 @@ typedef union {
 } Arg;
 
 typedef struct {
+	unsigned int click;
 	unsigned int mod;
 	unsigned int button;
 	void (*func)(const Arg *);
@@ -191,6 +198,7 @@ struct Monitor {
 	struct wl_list link;
 	struct wlr_output *wlr_output;
 	struct wlr_scene_output *scene_output;
+	struct wlr_scene_buffer *scene_buffer; /* bar buffer */
 	struct wlr_scene_rect *fullscreen_bg; /* See createmon() for info */
 	struct wl_listener frame;
 	struct wl_listener destroy;
@@ -198,6 +206,11 @@ struct Monitor {
 	struct wl_listener destroy_lock_surface;
 	struct wlr_session_lock_surface_v1 *lock_surface;
 	struct wlr_box m; /* monitor area, layout-relative */
+	struct {
+		int width, height;
+		int real_width, real_height; /* non-scaled */
+		float scale;
+	} b; /* bar area */
 	struct wlr_box w; /* window area, layout-relative */
 	struct wl_list layers[4]; /* LayerSurface.link */
 	const Layout *lt[2];
@@ -207,10 +220,19 @@ struct Monitor {
 	float mfact;
 	int gamma_lut_changed;
 	int nmaster;
+	int showbar;
 	char ltsymbol[16];
 	int asleep;
+	Drwl *drw;
+	int lrpad;
 };
 
+typedef struct {
+    struct wlr_buffer base;
+    size_t stride;
+    uint32_t data[];
+} Buffer;
+
 typedef struct {
 	const char *name;
 	float mfact;
@@ -251,6 +273,10 @@ static void arrangelayer(Monitor *m, struct wl_list *list,
 		struct wlr_box *usable_area, int exclusive);
 static void arrangelayers(Monitor *m);
 static void axisnotify(struct wl_listener *listener, void *data);
+static bool bar_accepts_input(struct wlr_scene_buffer *buffer, double *sx, double *sy);
+static void buffer_destroy(struct wlr_buffer *buffer);
+static bool buffer_begin_data_ptr_access(struct wlr_buffer *buffer, uint32_t flags, void **data, uint32_t *format, size_t *stride);
+static void buffer_end_data_ptr_access(struct wlr_buffer *buffer);
 static void buttonpress(struct wl_listener *listener, void *data);
 static void chvt(const Arg *arg);
 static void checkidleinhibitor(struct wlr_surface *exclude);
@@ -284,6 +310,8 @@ static void destroysessionlock(struct wl_listener *listener, void *data);
 static void destroysessionmgr(struct wl_listener *listener, void *data);
 static void destroykeyboardgroup(struct wl_listener *listener, void *data);
 static Monitor *dirtomon(enum wlr_direction dir);
+static void drawbar(Monitor *m);
+static void drawbars(void);
 static void focusclient(Client *c, int lift);
 static void focusmon(const Arg *arg);
 static void focusstack(const Arg *arg);
@@ -312,7 +340,6 @@ static void outputmgrapplyortest(struct wlr_output_configuration_v1 *config, int
 static void outputmgrtest(struct wl_listener *listener, void *data);
 static void pointerfocus(Client *c, struct wlr_surface *surface,
 		double sx, double sy, uint32_t time);
-static void printstatus(void);
 static void powermgrsetmode(struct wl_listener *listener, void *data);
 static void quit(const Arg *arg);
 static void rendermon(struct wl_listener *listener, void *data);
@@ -334,9 +361,11 @@ static void setsel(struct wl_listener *listener, void *data);
 static void setup(void);
 static void spawn(const Arg *arg);
 static void startdrag(struct wl_listener *listener, void *data);
+static int status_in(int fd, unsigned int mask, void *data);
 static void tag(const Arg *arg);
 static void tagmon(const Arg *arg);
 static void tile(Monitor *m);
+static void togglebar(const Arg *arg);
 static void togglefloating(const Arg *arg);
 static void togglefullscreen(const Arg *arg);
 static void toggletag(const Arg *arg);
@@ -345,6 +374,7 @@ static void unlocksession(struct wl_listener *listener, void *data);
 static void unmaplayersurfacenotify(struct wl_listener *listener, void *data);
 static void unmapnotify(struct wl_listener *listener, void *data);
 static void updatemons(struct wl_listener *listener, void *data);
+static void updatebar(Monitor *m);
 static void updatetitle(struct wl_listener *listener, void *data);
 static void urgent(struct wl_listener *listener, void *data);
 static void view(const Arg *arg);
@@ -411,6 +441,15 @@ static struct wlr_box sgeom;
 static struct wl_list mons;
 static Monitor *selmon;
 
+static char stext[256];
+static struct wl_event_source *status_event_source;
+
+static const struct wlr_buffer_impl buffer_impl = {
+    .destroy = buffer_destroy,
+    .begin_data_ptr_access = buffer_begin_data_ptr_access,
+    .end_data_ptr_access = buffer_end_data_ptr_access
+};
+
 #ifdef XWAYLAND
 static void activatex11(struct wl_listener *listener, void *data);
 static void associatex11(struct wl_listener *listener, void *data);
@@ -551,6 +590,11 @@ arrangelayers(Monitor *m)
 	if (!m->wlr_output->enabled)
 		return;
 
+	if (m->showbar) {
+		usable_area.height -= m->b.real_height;
+		usable_area.y += topbar ? m->b.real_height : 0;
+	}
+
 	/* Arrange exclusive surfaces from top->bottom */
 	for (i = 3; i >= 0; i--)
 		arrangelayer(m, &m->layers[i], &usable_area, 1);
@@ -593,17 +637,82 @@ axisnotify(struct wl_listener *listener, void *data)
 			event->delta_discrete, event->source);
 }
 
+bool
+bar_accepts_input(struct wlr_scene_buffer *buffer, double *sx, double *sy)
+{
+	return true;
+}
+
+void
+buffer_destroy(struct wlr_buffer *wlr_buffer)
+{
+	Buffer *buf;
+	buf = wl_container_of(wlr_buffer, buf, base);
+	free(buf);
+}
+
+bool
+buffer_begin_data_ptr_access(struct wlr_buffer *wlr_buffer, uint32_t flags,
+                             void **data, uint32_t *format, size_t *stride)
+{
+	Buffer *buf;
+	buf = wl_container_of(wlr_buffer, buf, base);
+
+	if (flags & WLR_BUFFER_DATA_PTR_ACCESS_WRITE) return false;
+
+	*data   = buf->data;
+	*stride = buf->stride;
+	*format = DRM_FORMAT_ARGB8888;
+
+	return true;
+}
+
+void
+buffer_end_data_ptr_access(struct wlr_buffer *buffer)
+{
+}
+
 void
 buttonpress(struct wl_listener *listener, void *data)
 {
+	unsigned int i = 0, x = 0;
+	unsigned int click;
 	struct wlr_pointer_button_event *event = data;
 	struct wlr_keyboard *keyboard;
+	struct wlr_scene_node *node;
+	struct wlr_scene_buffer *buffer;
 	uint32_t mods;
+	Arg arg = {0};
 	Client *c;
 	const Button *b;
 
 	wlr_idle_notifier_v1_notify_activity(idle_notifier, seat);
 
+	click = ClkRoot;
+	xytonode(cursor->x, cursor->y, NULL, &c, NULL, NULL, NULL);
+	if (c)
+		click = ClkClient;
+
+	if (!c && !exclusive_focus &&
+		(node = wlr_scene_node_at(&layers[LyrBottom]->node, cursor->x, cursor->y, NULL, NULL)) &&
+		(buffer = wlr_scene_buffer_from_node(node)) && buffer == selmon->scene_buffer) {
+		cursor->x *= selmon->wlr_output->scale;
+		cursor->y *= selmon->wlr_output->scale;
+		x = selmon->m.x;
+		do
+			x += TEXTW(selmon, tags[i]);
+		while (cursor->x >= x && ++i < LENGTH(tags));
+		if (i < LENGTH(tags)) {
+			click = ClkTagBar;
+			arg.ui = 1 << i;
+		} else if (cursor->x < x + TEXTW(selmon, selmon->ltsymbol))
+			click = ClkLtSymbol;
+		else if (cursor->x > selmon->w.width - (int)TEXTW(selmon, stext))
+			click = ClkStatus;
+		else
+			click = ClkTitle;
+	}
+
 	switch (event->state) {
 	case WLR_BUTTON_PRESSED:
 		cursor_mode = CurPressed;
@@ -612,15 +721,14 @@ buttonpress(struct wl_listener *listener, void *data)
 
 		/* Change focus if the button was _pressed_ over a client */
 		xytonode(cursor->x, cursor->y, NULL, &c, NULL, NULL, NULL);
-		if (c && (!client_is_unmanaged(c) || client_wants_focus(c)))
+		if (click == ClkClient && (!client_is_unmanaged(c) || client_wants_focus(c)))
 			focusclient(c, 1);
 
 		keyboard = wlr_seat_get_keyboard(seat);
 		mods = keyboard ? wlr_keyboard_get_modifiers(keyboard) : 0;
 		for (b = buttons; b < END(buttons); b++) {
-			if (CLEANMASK(mods) == CLEANMASK(b->mod) &&
-					event->button == b->button && b->func) {
-				b->func(&b->arg);
+			if (CLEANMASK(mods) == CLEANMASK(b->mod) && event->button == b->button && click == b->click && b->func) {
+				b->func(click == ClkTagBar && b->arg.i == 0 ? &arg : &b->arg);
 				return;
 			}
 		}
@@ -691,6 +799,8 @@ cleanup(void)
 	/* Destroy after the wayland display (when the monitors are already destroyed)
 	   to avoid destroying them with an invalid scene output. */
 	wlr_scene_node_destroy(&scene->tree.node);
+
+	drwl_fini();
 }
 
 void
@@ -706,6 +816,8 @@ cleanupmon(struct wl_listener *listener, void *data)
 			wlr_layer_surface_v1_destroy(l->layer_surface);
 	}
 
+	drwl_destroy(m->drw);
+
 	wl_list_remove(&m->destroy.link);
 	wl_list_remove(&m->frame.link);
 	wl_list_remove(&m->link);
@@ -745,7 +857,7 @@ closemon(Monitor *m)
 			setmon(c, selmon, c->tags);
 	}
 	focusclient(focustop(selmon), 1);
-	printstatus();
+	drawbars();
 }
 
 void
@@ -970,8 +1082,16 @@ createmon(struct wl_listener *listener, void *data)
 	wlr_output_commit_state(wlr_output, &state);
 	wlr_output_state_finish(&state);
 
+	if (!(m->drw = drwl_create()))
+		die("failed to create drwl context");
+
+	m->scene_buffer = wlr_scene_buffer_create(layers[LyrBottom], NULL);
+	m->scene_buffer->point_accepts_input = bar_accepts_input;
+	m->showbar = showbar;
+	updatebar(m);
+
 	wl_list_insert(&mons, &m->link);
-	printstatus();
+	drawbars();
 
 	/* The xdg-protocol specifies:
 	 *
@@ -1303,6 +1423,89 @@ dirtomon(enum wlr_direction dir)
 	return selmon;
 }
 
+void
+drawbar(Monitor *m)
+{
+	int x, w, tw = 0;
+	int boxs = m->drw->font->height / 9;
+	int boxw = m->drw->font->height / 6 + 2;
+	uint32_t i, occ = 0, urg = 0;
+	int32_t stride, size;
+	Client *c;
+	Buffer *buf;
+
+	if (!m->showbar)
+		return;
+
+	stride = drwl_stride(m->b.width);
+	size = stride * m->b.height;
+
+	buf = ecalloc(1, sizeof(Buffer) + size);
+	buf->stride = stride;
+	wlr_buffer_init(&buf->base, &buffer_impl, m->b.width, m->b.height);
+
+	drwl_prepare_drawing(m->drw, m->b.width, m->b.height, buf->data, stride);
+
+	/* draw status first so it can be overdrawn by tags later */
+	if (m == selmon) { /* status is only drawn on selected monitor */
+		drwl_setscheme(m->drw, colors[SchemeNorm]);
+		tw = TEXTW(m, stext) - m->lrpad + 2; /* 2px right padding */
+		drwl_text(m->drw, m->b.width - tw, 0, tw, m->b.height, 0, stext, 0);
+	}
+
+	wl_list_for_each(c, &clients, link) {
+		if (c->mon != m)
+			continue;
+		occ |= c->tags;
+		if (c->isurgent)
+			urg |= c->tags;
+	}
+	x = 0;
+	c = focustop(m);
+	for (i = 0; i < LENGTH(tags); i++) {
+		w = TEXTW(m, tags[i]);
+		drwl_setscheme(m->drw, colors[m->tagset[m->seltags] & 1 << i ? SchemeSel : SchemeNorm]);
+		drwl_text(m->drw, x, 0, w, m->b.height, m->lrpad / 2, tags[i], urg & 1 << i);
+		if (occ & 1 << i)
+			drwl_rect(m->drw, x + boxs, boxs, boxw, boxw,
+				m == selmon && c && c->tags & 1 << i,
+				urg & 1 << i);
+		x += w;
+	}
+	w = TEXTW(m, m->ltsymbol);
+	drwl_setscheme(m->drw, colors[SchemeNorm]);
+	x = drwl_text(m->drw, x, 0, w, m->b.height, m->lrpad / 2, m->ltsymbol, 0);
+
+	if ((w = m->b.width - tw - x) > m->b.height) {
+		if (c) {
+			drwl_setscheme(m->drw, colors[m == selmon ? SchemeSel : SchemeNorm]);
+			drwl_text(m->drw, x, 0, w, m->b.height, m->lrpad / 2, client_get_title(c), 0);
+			if (c && c->isfloating)
+				drwl_rect(m->drw, x + boxs, boxs, boxw, boxw, 0, 0);
+		} else {
+			drwl_setscheme(m->drw, colors[SchemeNorm]);
+			drwl_rect(m->drw, x, 0, w, m->b.height, 1, 1);
+		}
+	}
+
+	drwl_finish_drawing(m->drw);
+	wlr_scene_buffer_set_dest_size(m->scene_buffer,
+		m->b.real_width, m->b.real_height);
+	wlr_scene_node_set_position(&m->scene_buffer->node, m->m.x,
+		m->m.y + (topbar ? 0 : m->m.height - m->b.real_height));
+	wlr_scene_buffer_set_buffer(m->scene_buffer, &buf->base);
+	wlr_buffer_drop(&buf->base);
+}
+
+void
+drawbars(void)
+{
+	Monitor *m = NULL;
+
+	wl_list_for_each(m, &mons, link)
+		drawbar(m);
+}
+
 void
 focusclient(Client *c, int lift)
 {
@@ -1338,13 +1541,13 @@ focusclient(Client *c, int lift)
 		/* Don't change border color if there is an exclusive focus or we are
 		 * handling a drag operation */
 		if (!exclusive_focus && !seat->drag)
-			client_set_border_color(c, focuscolor);
+			client_set_border_color(c, (float[])COLOR(colors[SchemeSel][ColBorder]));
 	}
 
 	/* Deactivate old client if focus is changing */
 	if (old && (!c || client_surface(c) != old)) {
 		/* If an overlay is focused, don't focus or activate the client,
-		 * but only update its position in fstack to render its border with focuscolor
+		 * but only update its position in fstack to render its border with its color
 		 * and focus it after the overlay is closed. */
 		if (old_client_type == LayerShell && wlr_scene_node_coords(
 					&old_l->scene->node, &unused_lx, &unused_ly)
@@ -1355,12 +1558,11 @@ focusclient(Client *c, int lift)
 		/* Don't deactivate old client if the new one wants focus, as this causes issues with winecfg
 		 * and probably other clients */
 		} else if (old_c && !client_is_unmanaged(old_c) && (!c || !client_wants_focus(c))) {
-			client_set_border_color(old_c, bordercolor);
-
+			client_set_border_color(old_c, (float[])COLOR(colors[SchemeNorm][ColBorder]));
 			client_activate_surface(old, 0);
 		}
 	}
-	printstatus();
+	drawbars();
 
 	if (!c) {
 		/* With no client, all we have left is to clear focus */
@@ -1664,7 +1866,7 @@ mapnotify(struct wl_listener *listener, void *data)
 
 	for (i = 0; i < 4; i++) {
 		c->border[i] = wlr_scene_rect_create(c->scene, 0, 0,
-				c->isurgent ? urgentcolor : bordercolor);
+			(float[])COLOR(colors[c->isurgent ? SchemeUrg : SchemeNorm][ColBorder]));
 		c->border[i]->node.data = c;
 	}
 
@@ -1687,7 +1889,7 @@ mapnotify(struct wl_listener *listener, void *data)
 	} else {
 		applyrules(c);
 	}
-	printstatus();
+	drawbars();
 
 unset_fullscreen:
 	m = c->mon ? c->mon : xytomon(c->geom.x, c->geom.y);
@@ -1980,46 +2182,6 @@ pointerfocus(Client *c, struct wlr_surface *surface, double sx, double sy,
 	wlr_seat_pointer_notify_motion(seat, time, sx, sy);
 }
 
-void
-printstatus(void)
-{
-	Monitor *m = NULL;
-	Client *c;
-	uint32_t occ, urg, sel;
-	const char *appid, *title;
-
-	wl_list_for_each(m, &mons, link) {
-		occ = urg = 0;
-		wl_list_for_each(c, &clients, link) {
-			if (c->mon != m)
-				continue;
-			occ |= c->tags;
-			if (c->isurgent)
-				urg |= c->tags;
-		}
-		if ((c = focustop(m))) {
-			title = client_get_title(c);
-			appid = client_get_appid(c);
-			printf("%s title %s\n", m->wlr_output->name, title ? title : broken);
-			printf("%s appid %s\n", m->wlr_output->name, appid ? appid : broken);
-			printf("%s fullscreen %d\n", m->wlr_output->name, c->isfullscreen);
-			printf("%s floating %d\n", m->wlr_output->name, c->isfloating);
-			sel = c->tags;
-		} else {
-			printf("%s title \n", m->wlr_output->name);
-			printf("%s appid \n", m->wlr_output->name);
-			printf("%s fullscreen \n", m->wlr_output->name);
-			printf("%s floating \n", m->wlr_output->name);
-			sel = 0;
-		}
-
-		printf("%s selmon %u\n", m->wlr_output->name, m == selmon);
-		printf("%s tags %"PRIu32" %"PRIu32" %"PRIu32" %"PRIu32"\n",
-			m->wlr_output->name, occ, m->tagset[m->seltags], sel, urg);
-		printf("%s layout %s\n", m->wlr_output->name, m->ltsymbol);
-	}
-	fflush(stdout);
-}
 
 void
 powermgrsetmode(struct wl_listener *listener, void *data)
@@ -2173,24 +2335,16 @@ run(char *startup_cmd)
 
 	/* Now that the socket exists and the backend is started, run the startup command */
 	if (startup_cmd) {
-		int piperw[2];
-		if (pipe(piperw) < 0)
-			die("startup: pipe:");
 		if ((child_pid = fork()) < 0)
 			die("startup: fork:");
 		if (child_pid == 0) {
+			close(STDIN_FILENO);
 			setsid();
-			dup2(piperw[0], STDIN_FILENO);
-			close(piperw[0]);
-			close(piperw[1]);
 			execl("/bin/sh", "/bin/sh", "-c", startup_cmd, NULL);
 			die("startup: execl:");
 		}
-		dup2(piperw[1], STDOUT_FILENO);
-		close(piperw[1]);
-		close(piperw[0]);
 	}
-	printstatus();
+	drawbars();
 
 	/* At this point the outputs are initialized, choose initial selmon based on
 	 * cursor position, and set default cursor image */
@@ -2256,7 +2410,7 @@ setfloating(Client *c, int floating)
 			(p && p->isfullscreen) ? LyrFS
 			: c->isfloating ? LyrFloat : LyrTile]);
 	arrange(c->mon);
-	printstatus();
+	drawbars();
 }
 
 void
@@ -2279,7 +2433,7 @@ setfullscreen(Client *c, int fullscreen)
 		resize(c, c->prev, 0);
 	}
 	arrange(c->mon);
-	printstatus();
+	drawbars();
 }
 
 void
@@ -2304,7 +2458,7 @@ setlayout(const Arg *arg)
 		selmon->lt[selmon->sellt] = (Layout *)arg->v;
 	strncpy(selmon->ltsymbol, selmon->lt[selmon->sellt]->symbol, LENGTH(selmon->ltsymbol));
 	arrange(selmon);
-	printstatus();
+	drawbar(selmon);
 }
 
 /* arg > 1.0 will set mfact absolutely */
@@ -2377,6 +2531,7 @@ setup(void)
 	for (i = 0; i < (int)LENGTH(sig); i++)
 		sigaction(sig[i], &sa, NULL);
 
+
 	wlr_log_init(log_level, NULL);
 
 	/* The Wayland display is managed by libwayland. It handles accepting
@@ -2563,6 +2718,11 @@ setup(void)
 
 	wlr_scene_set_presentation(scene, wlr_presentation_create(dpy, backend));
 
+	drwl_init();
+
+	status_event_source = wl_event_loop_add_fd(wl_display_get_event_loop(dpy),
+		STDIN_FILENO, WL_EVENT_READABLE, status_in, NULL);
+
 	/* Make sure XWayland clients don't connect to the parent X server,
 	 * e.g when running in the x11 backend or the wayland backend and the
 	 * compositor has Xwayland support */
@@ -2587,6 +2747,7 @@ void
 spawn(const Arg *arg)
 {
 	if (fork() == 0) {
+		close(STDIN_FILENO);
 		dup2(STDERR_FILENO, STDOUT_FILENO);
 		setsid();
 		execvp(((char **)arg->v)[0], (char **)arg->v);
@@ -2605,6 +2766,30 @@ startdrag(struct wl_listener *listener, void *data)
 	LISTEN_STATIC(&drag->icon->events.destroy, destroydragicon);
 }
 
+int
+status_in(int fd, unsigned int mask, void *data)
+{
+	char status[1024];
+	ssize_t n;
+
+	if (mask & WL_EVENT_ERROR)
+		die("status in event error");
+	if (mask & WL_EVENT_HANGUP)
+		wl_event_source_remove(status_event_source);
+
+	n = read(fd, status, sizeof(status) - 1);
+	if (n < 0 && errno != EWOULDBLOCK)
+		die("read:");
+
+	status[n] = '\0';
+	status[strcspn(status, "\n")] = '\0';
+
+	strncpy(stext, status, sizeof(stext));
+	drawbars();
+
+	return 0;
+}
+
 void
 tag(const Arg *arg)
 {
@@ -2615,7 +2800,7 @@ tag(const Arg *arg)
 	sel->tags = arg->ui & TAGMASK;
 	focusclient(focustop(selmon), 1);
 	arrange(selmon);
-	printstatus();
+	drawbars();
 }
 
 void
@@ -2660,6 +2845,14 @@ tile(Monitor *m)
 	}
 }
 
+void
+togglebar(const Arg *arg)
+{
+	selmon->showbar = !selmon->showbar;
+	wlr_scene_node_set_enabled(&selmon->scene_buffer->node, selmon->showbar);
+	arrangelayers(selmon);
+}
+
 void
 togglefloating(const Arg *arg)
 {
@@ -2688,7 +2881,7 @@ toggletag(const Arg *arg)
 	sel->tags = newtags;
 	focusclient(focustop(selmon), 1);
 	arrange(selmon);
-	printstatus();
+	drawbars();
 }
 
 void
@@ -2701,7 +2894,7 @@ toggleview(const Arg *arg)
 	selmon->tagset[selmon->seltags] = newtagset;
 	focusclient(focustop(selmon), 1);
 	arrange(selmon);
-	printstatus();
+	drawbars();
 }
 
 void
@@ -2749,7 +2942,7 @@ unmapnotify(struct wl_listener *listener, void *data)
 	}
 
 	wlr_scene_node_destroy(&c->scene->node);
-	printstatus();
+	drawbars();
 	motionnotify(0, NULL, 0, 0, 0, 0);
 }
 
@@ -2849,6 +3042,14 @@ updatemons(struct wl_listener *listener, void *data)
 		}
 	}
 
+	/* Update bar */
+	if (stext[0] == '\0')
+		strncpy(stext, "dwl-"VERSION, sizeof(stext));
+	wl_list_for_each(m, &mons, link) {
+		updatebar(m);
+		drawbar(m);
+	}
+
 	/* FIXME: figure out why the cursor image is at 0,0 after turning all
 	 * the monitors on.
 	 * Move the cursor image where it used to be. It does not generate a
@@ -2859,12 +3060,36 @@ updatemons(struct wl_listener *listener, void *data)
 	wlr_output_manager_v1_set_configuration(output_mgr, config);
 }
 
+void
+updatebar(Monitor *m)
+{
+	int rw, rh;
+	char fontattrs[12];
+
+	wlr_output_transformed_resolution(m->wlr_output, &rw, &rh);
+	m->b.width = rw;
+	m->b.real_width = (int)((float)m->b.width / m->wlr_output->scale);
+
+	if (m->b.scale == m->wlr_output->scale && m->drw)
+		return;
+
+	drwl_destroy_font(m->drw->font);
+	snprintf(fontattrs, sizeof(fontattrs), "dpi=%.2f", 96. * m->wlr_output->scale);
+	if (!(drwl_load_font(m->drw, LENGTH(fonts), fonts, fontattrs)))
+		die("Could not load font");
+
+	m->b.scale = m->wlr_output->scale;
+	m->lrpad = m->drw->font->height;
+	m->b.height = m->drw->font->height + 2;
+	m->b.real_height = (int)((float)m->b.height / m->wlr_output->scale);
+}
+
 void
 updatetitle(struct wl_listener *listener, void *data)
 {
 	Client *c = wl_container_of(listener, c, set_title);
 	if (c == focustop(c->mon))
-		printstatus();
+		drawbars();
 }
 
 void
@@ -2877,10 +3102,10 @@ urgent(struct wl_listener *listener, void *data)
 		return;
 
 	c->isurgent = 1;
-	printstatus();
+	drawbars();
 
 	if (client_surface(c)->mapped)
-		client_set_border_color(c, urgentcolor);
+		client_set_border_color(c, (float[])COLOR(colors[SchemeUrg][ColBorder]));
 }
 
 void
@@ -2893,7 +3118,7 @@ view(const Arg *arg)
 		selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
 	focusclient(focustop(selmon), 1);
 	arrange(selmon);
-	printstatus();
+	drawbars();
 }
 
 void
@@ -2934,6 +3159,7 @@ xytonode(double x, double y, struct wlr_surface **psurface,
 {
 	struct wlr_scene_node *node, *pnode;
 	struct wlr_surface *surface = NULL;
+	struct wlr_scene_surface *scene_surface = NULL;
 	Client *c = NULL;
 	LayerSurface *l = NULL;
 	int layer;
@@ -2942,9 +3168,12 @@ xytonode(double x, double y, struct wlr_surface **psurface,
 		if (!(node = wlr_scene_node_at(&layers[layer]->node, x, y, nx, ny)))
 			continue;
 
-		if (node->type == WLR_SCENE_NODE_BUFFER)
-			surface = wlr_scene_surface_try_from_buffer(
-					wlr_scene_buffer_from_node(node))->surface;
+		if (node->type == WLR_SCENE_NODE_BUFFER) {
+			scene_surface = wlr_scene_surface_try_from_buffer(
+					wlr_scene_buffer_from_node(node));
+			if (!scene_surface) continue;
+			surface = scene_surface->surface;
+		}
 		/* Walk the tree to find a node that knows the client */
 		for (pnode = node; pnode && !c; pnode = &pnode->parent->node)
 			c = pnode->data;
@@ -3083,10 +3312,10 @@ sethints(struct wl_listener *listener, void *data)
 		return;
 
 	c->isurgent = xcb_icccm_wm_hints_get_urgency(c->surface.xwayland->hints);
-	printstatus();
+	drawbars();
 
 	if (c->isurgent && surface && surface->mapped)
-		client_set_border_color(c, urgentcolor);
+		client_set_border_color(c, (float[])COLOR(colors[SchemeUrg][ColBorder]));
 }
 
 void
-- 
2.45.2