Add menu patch

README.org

@@ -15,6 +15,7 @@
     - [[#foreign-toplevel-management][Foreign Toplevel Management]]
     - [[#gapless-grid][Gapless Grid]]
     - [[#ipc][IPC]]
+    - [[#menu][Menu]]
     - [[#move-stack][Move Stack]]
     - [[#natural-scroll-trackpad][Natural Scroll Trackpad]]
     - [[#numlock-capslock][Numlock Capslock]]
@@ -28,6 +29,7 @@
     - [[#appearance][Appearance]]
     - [[#tagging][Tagging]]
     - [[#logging][Logging]]
+    - [[#menu-1][Menu]]
     - [[#environment-variables][Environment Variables]]
     - [[#autostart][Autostart]]
     - [[#window-rules][Window Rules]]
@@ -162,6 +164,20 @@ Note to [[https://codeberg.org/dwl/dwl-patches/src/branch/main/patches/pertag][p
 #define IPC_PATCH 1
 #+END_SRC
 
+*** [[https://codeberg.org/dwl/dwl-patches/src/branch/main/patches/menu][Menu]]
+
+This patch adds ~menu~ command, which allows dwl to interface with dmenu-like programs.
+
+By default, two menus are available:
+- focusing a window by its title by pressing ~Alt+o~
+- selecting a layout from a list by pressing ~Alt+Shift+o~
+
+Edit ~menus~ array in ~config.h~ to add/change menus and use a different dmenu program.
+
+#+BEGIN_SRC c :tangle patches.def.h
+#define MENU_PATCH 1
+#+END_SRC
+
 *** [[https://codeberg.org/dwl/dwl-patches/src/branch/main/patches/movestack][Move Stack]]
 
 Allows you to move a window up and down the stack.
@@ -289,6 +305,18 @@ static const float fullscreen_bg[]         = {0.1f, 0.1f, 0.1f, 1.0f}; /* You ca
 static int log_level = WLR_ERROR;
 #+END_SRC
 
+*** Menu
+
+#+BEGIN_SRC c :tangle config.h
+#if MENU_PATCH
+static const Menu menus[] = {
+	/* command          feed function   action function */
+	{ "rofi -dmenu -i", menuwinfeed,    menuwinaction    },
+	{ "rofi -dmenu -i", menulayoutfeed, menulayoutaction },
+};
+#endif // MENU_PATCH
+#+END_SRC
+
 *** Environment Variables
 #+BEGIN_SRC c :tangle config.h
 #if SETUPENV_PATCH
@@ -493,6 +521,10 @@ static const Key keys[] = {
 	{ MODKEY,                    XKB_KEY_g,          setlayout,      {.v = &layouts[3]} },
 #endif // GAPLESSGRID_PATCH
 	{ MODKEY,                    XKB_KEY_space,      setlayout,      {0} },
+#if MENU_PATCH
+	{ MODKEY|WLR_MODIFIER_SHIFT|WLR_MODIFIER_CTRL, XKB_KEY_p, menu,  {.v = &menus[0]} },
+	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_P,          menu,           {.v = &menus[1]} },
+#endif // MENU_PATCH
 	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_space,      togglefloating, {0} },
 	{ MODKEY,                    XKB_KEY_e,         togglefullscreen, {0} },
 #if FAKE_FULLSCREEN_CLIENT_PATCH

config.def.h

@@ -33,6 +33,14 @@ static const float fullscreen_bg[]         = {0.1f, 0.1f, 0.1f, 1.0f}; /* You ca
 /* logging */
 static int log_level = WLR_ERROR;
 
+#if MENU_PATCH
+static const Menu menus[] = {
+	/* command          feed function   action function */
+	{ "rofi -dmenu -i", menuwinfeed,    menuwinaction    },
+	{ "rofi -dmenu -i", menulayoutfeed, menulayoutaction },
+};
+#endif // MENU_PATCH
+
 #if SETUPENV_PATCH
 static const Env envs[] = {
 	/* variable			value */
@@ -208,6 +216,10 @@ static const Key keys[] = {
 	{ MODKEY,                    XKB_KEY_g,          setlayout,      {.v = &layouts[3]} },
 #endif // GAPLESSGRID_PATCH
 	{ MODKEY,                    XKB_KEY_space,      setlayout,      {0} },
+#if MENU_PATCH
+	{ MODKEY|WLR_MODIFIER_SHIFT|WLR_MODIFIER_CTRL, XKB_KEY_p, menu,  {.v = &menus[0]} },
+	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_P,          menu,           {.v = &menus[1]} },
+#endif // MENU_PATCH
 	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_space,      togglefloating, {0} },
 	{ MODKEY,                    XKB_KEY_e,         togglefullscreen, {0} },
 #if FAKE_FULLSCREEN_CLIENT_PATCH

config.h

@@ -31,6 +31,14 @@ static const float fullscreen_bg[]         = {0.1f, 0.1f, 0.1f, 1.0f}; /* You ca
 
 static int log_level = WLR_ERROR;
 
+#if MENU_PATCH
+static const Menu menus[] = {
+	/* command          feed function   action function */
+	{ "rofi -dmenu -i", menuwinfeed,    menuwinaction    },
+	{ "rofi -dmenu -i", menulayoutfeed, menulayoutaction },
+};
+#endif // MENU_PATCH
+
 #if SETUPENV_PATCH
 static const Env envs[] = {
 	/* variable			value */
@@ -201,6 +209,10 @@ static const Key keys[] = {
 	{ MODKEY,                    XKB_KEY_g,          setlayout,      {.v = &layouts[3]} },
 #endif // GAPLESSGRID_PATCH
 	{ MODKEY,                    XKB_KEY_space,      setlayout,      {0} },
+#if MENU_PATCH
+	{ MODKEY|WLR_MODIFIER_SHIFT|WLR_MODIFIER_CTRL, XKB_KEY_p, menu,  {.v = &menus[0]} },
+	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_P,          menu,           {.v = &menus[1]} },
+#endif // MENU_PATCH
 	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_space,      togglefloating, {0} },
 	{ MODKEY,                    XKB_KEY_e,         togglefullscreen, {0} },
 #if FAKE_FULLSCREEN_CLIENT_PATCH

dwl.c

@@ -296,6 +296,14 @@ typedef struct {
 	struct wl_listener destroy;
 } SessionLock;
 
+#if MENU_PATCH
+typedef struct {
+	const char *cmd; /* command to run a menu */
+	void (*feed)(FILE *f); /* feed input to menu */
+	void (*action)(char *line); /* do action based on menu output */
+} Menu;
+#endif // MENU_PATCH
+
 /* function declarations */
 static void applybounds(Client *c, struct wlr_box *bbox);
 static void applyrules(Client *c);
@@ -391,6 +399,14 @@ static void killclient(const Arg *arg);
 static void locksession(struct wl_listener *listener, void *data);
 static void mapnotify(struct wl_listener *listener, void *data);
 static void maximizenotify(struct wl_listener *listener, void *data);
+#if MENU_PATCH
+static void menu(const Arg *arg);
+static int menuloop(void *data);
+static void menuwinfeed(FILE *f);
+static void menuwinaction(char *line);
+static void menulayoutfeed(FILE *f);
+static void menulayoutaction(char *line);
+#endif // MENU_PATCH
 static void monocle(Monitor *m);
 #if MOVESTACK_PATCH
 static void movestack(const Arg *arg);
@@ -547,6 +563,13 @@ static struct wlr_box sgeom;
 static struct wl_list mons;
 static Monitor *selmon;
 
+#if MENU_PATCH
+static struct wl_event_source *menu_source;
+static pid_t menu_pid;
+static int menu_fd;
+static const Menu *menu_current;
+#endif // MENU_PATCH
+
 #if IPC_PATCH
 static struct zdwl_ipc_manager_v2_interface dwl_manager_implementation = {.release = dwl_ipc_manager_release, .get_output = dwl_ipc_manager_get_output};
 static struct zdwl_ipc_output_v2_interface dwl_output_implementation = {.release = dwl_ipc_output_release, .set_tags = dwl_ipc_output_set_tags, .set_layout = dwl_ipc_output_set_layout, .set_client_tags = dwl_ipc_output_set_client_tags};
@@ -891,6 +914,9 @@ cleanup(void)
 	wlr_xwayland_destroy(xwayland);
 	xwayland = NULL;
 #endif // XWAYLAND
+#if MENU_PATCH
+	wl_event_source_remove(menu_source);
+#endif // MENU_PATCH
 	wl_display_destroy_clients(dpy);
 
 #if AUTOSTART_PATCH
@@ -2558,6 +2584,138 @@ maximizenotify(struct wl_listener *listener, void *data)
 		wlr_xdg_surface_schedule_configure(c->surface.xdg);
 }
 
+#if MENU_PATCH
+void
+menu(const Arg *arg)
+{
+	FILE *f;
+	pid_t pid;
+	int fd_right[2], fd_left[2];
+
+	if (!selmon || menu_pid != 0)
+		return;
+
+	menu_current = arg->v;
+
+	if (pipe(fd_right) == -1 || pipe(fd_left) == -1)
+		return;
+	if ((pid = fork()) == -1)
+		return;
+	if (pid == 0) {
+		close(fd_right[1]);
+		close(fd_left[0]);
+		dup2(fd_right[0], STDIN_FILENO);
+		close(fd_right[0]);
+		dup2(fd_left[1], STDOUT_FILENO);
+		close(fd_left[1]);
+
+		execl("/bin/sh", "/bin/sh", "-c", menu_current->cmd, NULL);
+		die("dwl: execl %s failed:", "/bin/sh");
+	}
+
+	close(fd_right[0]);
+	close(fd_left[1]);
+
+	if (!(f = fdopen(fd_right[1], "w")))
+		return;
+	menu_current->feed(f);
+	fclose(f);
+
+	menu_pid = pid;
+	menu_fd = fd_left[0];
+	wl_event_source_timer_update(menu_source, 10);
+}
+
+int
+menuloop(void *data)
+{
+	FILE *f;
+	pid_t pid;
+	char line[256], *s;
+
+	/* If process is still running, wait for another 50 ms */
+	if ((pid = waitpid(menu_pid, NULL, WNOHANG)) == 0) {
+		wl_event_source_timer_update(menu_source, 10);
+		return 0;
+	}
+
+	menu_pid = 0;
+
+	if (!(f = fdopen(menu_fd, "r")))
+		return 0;
+	if (fgets(line, sizeof(line), f)) {
+		if ((s = strchr(line, '\n')))
+			*s = '\0';
+		menu_current->action(line);
+	}
+	fclose(f);
+	return 0;
+}
+
+void
+menuwinfeed(FILE *f)
+{
+	Client *c;
+	const char *title;
+
+	wl_list_for_each(c, &fstack, flink) {
+		if (!(title = client_get_title(c)))
+			continue;
+		fprintf(f, "%s\n", title);
+	}
+}
+
+void
+menuwinaction(char *line)
+{
+	Client *c;
+	Monitor *prevm = selmon;
+	const char *title;
+
+	if (!selmon)
+		return;
+
+	wl_list_for_each(c, &fstack, flink) {
+		if (!(title = client_get_title(c)))
+			continue;
+		if (strcmp(line, title) == 0)
+			goto found;
+	}
+	return;
+
+found:
+	focusclient(c, 1);
+	wlr_cursor_move(cursor, NULL, selmon->m.x - prevm->m.x , 0);
+	selmon->seltags ^= 1; /* toggle sel tagset */
+	selmon->tagset[selmon->seltags] = c->tags;
+	arrange(selmon);
+	printstatus();
+}
+
+void
+menulayoutfeed(FILE *f)
+{
+	unsigned int i;
+	for (i = 0; i < LENGTH(layouts); i++)
+		fprintf(f, "%s\n", layouts[i].symbol);
+}
+
+void
+menulayoutaction(char *line)
+{
+	unsigned int i;
+	Arg a;
+	for (i = 0; i < LENGTH(layouts); i++)
+		if (strcmp(line, layouts[i].symbol) == 0)
+			goto found;
+	return;
+
+found:
+	a.v = &layouts[i];
+	setlayout(&a);
+}
+#endif // MENU_PATCH
+
 void
 monocle(Monitor *m)
 {
@@ -3582,6 +3740,12 @@ setup(void)
 	 * e.g when running in the x11 backend or the wayland backend and the
 	 * compositor has Xwayland support */
 	unsetenv("DISPLAY");
+
+#if MENU_PATCH
+	menu_source = wl_event_loop_add_timer(
+			wl_display_get_event_loop(dpy), menuloop, NULL);
+#endif // MENU_PATCH
+
 #ifdef XWAYLAND
 	/*
 	 * Initialise the XWayland X server.

patches.def.h

@@ -14,6 +14,8 @@
 
 #define IPC_PATCH 1
 
+#define MENU_PATCH 1
+
 #define MOVESTACK_PATCH 1
 
 #define NATURALSCROLLTRACKPAD_PATCH 1

patches/menu-20240713.patch

@@ -0,0 +1,230 @@
+commit 2d7e19dc948aec61746fd858394a9c80d34a3216
+Author: Nikita Ivanov <nikita.vyach.ivanov@gmail.com>
+Date:   Sat Jul 13 01:05:20 2024 +0200
+
+    Add menu command
+
+diff --git a/config.def.h b/config.def.h
+index 22d2171..ecd2c67 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -20,6 +20,12 @@ static const float fullscreen_bg[]         = {0.1f, 0.1f, 0.1f, 1.0f}; /* You ca
+ /* logging */
+ static int log_level = WLR_ERROR;
+ 
++static const Menu menus[] = {
++	/* command                            feed function        action function */
++	{ "wmenu -i -l 5 -p Windows",         menuwinfeed,         menuwinaction    },
++	{ "wmenu -i -p Layouts",              menulayoutfeed,      menulayoutaction },
++};
++
+ /* NOTE: ALWAYS keep a rule declared even if you don't use rules (e.g leave at least one example) */
+ static const Rule rules[] = {
+ 	/* app_id             title       tags mask     isfloating   monitor */
+@@ -140,6 +146,8 @@ static const Key keys[] = {
+ 	{ MODKEY,                    XKB_KEY_f,          setlayout,      {.v = &layouts[1]} },
+ 	{ MODKEY,                    XKB_KEY_m,          setlayout,      {.v = &layouts[2]} },
+ 	{ MODKEY,                    XKB_KEY_space,      setlayout,      {0} },
++	{ MODKEY,                    XKB_KEY_o,          menu,           {.v = &menus[0]} },
++	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_O,          menu,           {.v = &menus[1]} },
+ 	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_space,      togglefloating, {0} },
+ 	{ MODKEY,                    XKB_KEY_e,         togglefullscreen, {0} },
+ 	{ MODKEY,                    XKB_KEY_0,          view,           {.ui = ~0} },
+diff --git a/dwl.c b/dwl.c
+index dc0437e..90bb09a 100644
+--- a/dwl.c
++++ b/dwl.c
+@@ -241,6 +241,12 @@ typedef struct {
+ 	struct wl_listener destroy;
+ } SessionLock;
+ 
++typedef struct {
++	const char *cmd; /* command to run a menu */
++	void (*feed)(FILE *f); /* feed input to menu */
++	void (*action)(char *line); /* do action based on menu output */
++} Menu;
++
+ /* function declarations */
+ static void applybounds(Client *c, struct wlr_box *bbox);
+ static void applyrules(Client *c);
+@@ -298,6 +304,12 @@ static void killclient(const Arg *arg);
+ static void locksession(struct wl_listener *listener, void *data);
+ static void mapnotify(struct wl_listener *listener, void *data);
+ static void maximizenotify(struct wl_listener *listener, void *data);
++static void menu(const Arg *arg);
++static int menuloop(void *data);
++static void menuwinfeed(FILE *f);
++static void menuwinaction(char *line);
++static void menulayoutfeed(FILE *f);
++static void menulayoutaction(char *line);
+ static void monocle(Monitor *m);
+ static void motionabsolute(struct wl_listener *listener, void *data);
+ static void motionnotify(uint32_t time, struct wlr_input_device *device, double sx,
+@@ -408,6 +420,11 @@ static struct wlr_box sgeom;
+ static struct wl_list mons;
+ static Monitor *selmon;
+ 
++static struct wl_event_source *menu_source;
++static pid_t menu_pid;
++static int menu_fd;
++static const Menu *menu_current;
++
+ #ifdef XWAYLAND
+ static void activatex11(struct wl_listener *listener, void *data);
+ static void associatex11(struct wl_listener *listener, void *data);
+@@ -675,6 +692,7 @@ cleanup(void)
+ 	wlr_xwayland_destroy(xwayland);
+ 	xwayland = NULL;
+ #endif
++	wl_event_source_remove(menu_source);
+ 	wl_display_destroy_clients(dpy);
+ 	if (child_pid > 0) {
+ 		kill(-child_pid, SIGTERM);
+@@ -1717,6 +1735,136 @@ maximizenotify(struct wl_listener *listener, void *data)
+ 		wlr_xdg_surface_schedule_configure(c->surface.xdg);
+ }
+ 
++void
++menu(const Arg *arg)
++{
++	FILE *f;
++	pid_t pid;
++	int fd_right[2], fd_left[2];
++
++	if (!selmon || menu_pid != 0)
++		return;
++
++	menu_current = arg->v;
++
++	if (pipe(fd_right) == -1 || pipe(fd_left) == -1)
++		return;
++	if ((pid = fork()) == -1)
++		return;
++	if (pid == 0) {
++		close(fd_right[1]);
++		close(fd_left[0]);
++		dup2(fd_right[0], STDIN_FILENO);
++		close(fd_right[0]);
++		dup2(fd_left[1], STDOUT_FILENO);
++		close(fd_left[1]);
++
++		execl("/bin/sh", "/bin/sh", "-c", menu_current->cmd, NULL);
++		die("dwl: execl %s failed:", "/bin/sh");
++	}
++
++	close(fd_right[0]);
++	close(fd_left[1]);
++
++	if (!(f = fdopen(fd_right[1], "w")))
++		return;
++	menu_current->feed(f);
++	fclose(f);
++
++	menu_pid = pid;
++	menu_fd = fd_left[0];
++	wl_event_source_timer_update(menu_source, 10);
++}
++
++int
++menuloop(void *data)
++{
++	FILE *f;
++	pid_t pid;
++	char line[256], *s;
++
++	/* If process is still running, wait for another 50 ms */
++	if ((pid = waitpid(menu_pid, NULL, WNOHANG)) == 0) {
++		wl_event_source_timer_update(menu_source, 10);
++		return 0;
++	}
++
++	menu_pid = 0;
++
++	if (!(f = fdopen(menu_fd, "r")))
++		return 0;
++	if (fgets(line, sizeof(line), f)) {
++		if ((s = strchr(line, '\n')))
++			*s = '\0';
++		menu_current->action(line);
++	}
++	fclose(f);
++	return 0;
++}
++
++void
++menuwinfeed(FILE *f)
++{
++	Client *c;
++	const char *title;
++
++	wl_list_for_each(c, &fstack, flink) {
++		if (!(title = client_get_title(c)))
++			continue;
++		fprintf(f, "%s\n", title);
++	}
++}
++
++void
++menuwinaction(char *line)
++{
++	Client *c;
++	Monitor *prevm = selmon;
++	const char *title;
++
++	if (!selmon)
++		return;
++
++	wl_list_for_each(c, &fstack, flink) {
++		if (!(title = client_get_title(c)))
++			continue;
++		if (strcmp(line, title) == 0)
++			goto found;
++	}
++	return;
++
++found:
++	focusclient(c, 1);
++	wlr_cursor_move(cursor, NULL, selmon->m.x - prevm->m.x , 0);
++	selmon->seltags ^= 1; /* toggle sel tagset */
++	selmon->tagset[selmon->seltags] = c->tags;
++	arrange(selmon);
++	printstatus();
++}
++
++void
++menulayoutfeed(FILE *f)
++{
++	unsigned int i;
++	for (i = 0; i < LENGTH(layouts); i++)
++		fprintf(f, "%s\n", layouts[i].symbol);
++}
++
++void
++menulayoutaction(char *line)
++{
++	unsigned int i;
++	Arg a;
++	for (i = 0; i < LENGTH(layouts); i++)
++		if (strcmp(line, layouts[i].symbol) == 0)
++			goto found;
++	return;
++
++found:
++	a.v = &layouts[i];
++	setlayout(&a);
++}
++
+ void
+ monocle(Monitor *m)
+ {
+@@ -2576,6 +2724,10 @@ setup(void)
+ 	 * e.g when running in the x11 backend or the wayland backend and the
+ 	 * compositor has Xwayland support */
+ 	unsetenv("DISPLAY");
++
++	menu_source = wl_event_loop_add_timer(
++			wl_display_get_event_loop(dpy), menuloop, NULL);
++
+ #ifdef XWAYLAND
+ 	/*
+ 	 * Initialise the XWayland X server.