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dwl-patches/patches/menu/menu.patch
Nikita Ivanov ca28e6d2d8
menu: fix pointer reset on error
2025-03-26 01:11:20 +01:00

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From da9861cf0448ca94011470634fd61c3ef2129a25 Mon Sep 17 00:00:00 2001
From: Nikita Ivanov <nikita.vyach.ivanov@gmail.com>
Date: Fri, 21 Mar 2025 21:48:42 +0100
Subject: [PATCH] Add menu command
---
config.def.h | 8 +++
dwl.c | 156 +++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 164 insertions(+)
diff --git a/config.def.h b/config.def.h
index 22d2171..a5914ca 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 10 -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 def2562..b0e8310 100644
--- a/dwl.c
+++ b/dwl.c
@@ -242,6 +242,12 @@ 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);
@@ -302,6 +308,12 @@ 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 menuread(int fd, uint32_t mask, 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,
@@ -413,6 +425,11 @@ static struct wlr_box sgeom;
static struct wl_list mons;
static Monitor *selmon;
+static const Menu *menu_current;
+static int menu_fd;
+static pid_t menu_pid;
+static struct wl_event_source *menu_source;
+
#ifdef XWAYLAND
static void activatex11(struct wl_listener *listener, void *data);
static void associatex11(struct wl_listener *listener, void *data);
@@ -1768,6 +1785,145 @@ maximizenotify(struct wl_listener *listener, void *data)
wlr_xdg_surface_schedule_configure(c->surface.xdg);
}
+void
+menu(const Arg *arg)
+{
+ FILE *f;
+ int fd_right[2], fd_left[2];
+
+ if (menu_current != NULL) {
+ wl_event_source_remove(menu_source);
+ close(menu_fd);
+ kill(menu_pid, SIGTERM);
+ menu_current = NULL;
+ if (!arg->v)
+ return;
+ }
+
+ if (pipe(fd_right) == -1 || pipe(fd_left) == -1)
+ return;
+ if ((menu_pid = fork()) == -1)
+ return;
+ if (menu_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 *)(arg->v))->cmd, NULL);
+ die("dwl: execl %s failed:", "/bin/sh");
+ }
+
+ close(fd_right[0]);
+ close(fd_left[1]);
+ menu_fd = fd_left[0];
+ if (fd_set_nonblock(menu_fd) == -1)
+ return;
+ if (!(f = fdopen(fd_right[1], "w")))
+ return;
+ menu_current = arg->v;
+ menu_current->feed(f);
+ fclose(f);
+ menu_source = wl_event_loop_add_fd(event_loop,
+ menu_fd, WL_EVENT_READABLE, menuread, NULL);
+}
+
+int
+menuread(int fd, uint32_t mask, void *data)
+{
+ char *s;
+ int n;
+ static char line[512];
+ static int i = 0;
+
+ if (mask & (WL_EVENT_HANGUP | WL_EVENT_ERROR)) {
+ i = 0;
+ menu(&(const Arg){ .v = NULL });
+ return 0;
+ }
+ if ((n = read(menu_fd, line + i, LENGTH(line) - 1 - i)) == -1) {
+ if (errno != EAGAIN) {
+ i = 0;
+ menu(&(const Arg){ .v = NULL });
+ }
+ return 0;
+ }
+ line[i + n] = '\0';
+ if (!(s = strchr(line + i, '\n'))) {
+ i += n;
+ return 0;
+ }
+ i = 0;
+ *s = '\0';
+ menu_current->action(line);
+ return 0;
+}
+
+void
+menuwinfeed(FILE *f)
+{
+ Client *c;
+ const char *title, *appid;
+
+ wl_list_for_each(c, &fstack, flink) {
+ if (!(title = client_get_title(c)))
+ continue;
+ fprintf(f, "%s", title);
+ if ((appid = client_get_appid(c)))
+ fprintf(f, " | %s", appid);
+ fputc('\n', f);
+ }
+}
+
+void
+menuwinaction(char *line)
+{
+ Client *c;
+ const char *appid, *title;
+ static char buf[512];
+
+ wl_list_for_each(c, &fstack, flink) {
+ if (!(title = client_get_title(c)))
+ continue;
+ appid = client_get_appid(c);
+ snprintf(buf, LENGTH(buf) - 1, "%s%s%s",
+ title, appid ? " | " : "", appid ? appid : "");
+ if (strcmp(line, buf) == 0)
+ goto found;
+ }
+ return;
+
+found:
+ if (!c->mon)
+ return;
+ wl_list_remove(&c->flink);
+ wl_list_insert(&fstack, &c->flink);
+ selmon = c->mon;
+ view(&(const Arg){ .ui = c->tags });
+}
+
+void
+menulayoutfeed(FILE *f)
+{
+ const Layout *l;
+ for (l = layouts; l < END(layouts); l++)
+ fprintf(f, "%s\n", l->symbol);
+}
+
+void
+menulayoutaction(char *line)
+{
+ const Layout *l;
+ for (l = layouts; l < END(layouts); l++)
+ if (strcmp(line, l->symbol) == 0)
+ goto found;
+ return;
+
+found:
+ setlayout(&(const Arg){ .v = l });
+}
+
void
monocle(Monitor *m)
{
--
2.49.0
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