From b87cd2c058b61968988f0a15d153e6e9cf3b2e08 Mon Sep 17 00:00:00 2001
From: auric <104602845+ihateamongus@users.noreply.github.com>
Date: Sun, 7 Sep 2025 16:33:30 -0500
Subject: Enable dynamic accent color in dmenu

---
 dmenu/dmenu.c | 129 ++++++++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 94 insertions(+), 35 deletions(-)

(limited to 'dmenu/dmenu.c')

diff --git a/dmenu/dmenu.c b/dmenu/dmenu.c
index fd49549..0eb6d45 100644
--- a/dmenu/dmenu.c
+++ b/dmenu/dmenu.c
@@ -7,6 +7,11 @@
 #include <strings.h>
 #include <time.h>
 #include <unistd.h>
+#include <stdint.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/select.h>
 
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>
@@ -52,6 +57,17 @@ static XIC xic;
 static Drw *drw;
 static Clr *scheme[SchemeLast];
 
+#define SHMNAME "/breathing_color_shm"
+typedef struct {
+uint32_t seq;
+char color[8];
+} ColorShm;
+static ColorShm *accentshm;
+static char accentcol[8] = "#005577";
+
+static void initaccent(void);
+static void updateaccent(void);
+
 #include "config.h"
 
 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
@@ -111,6 +127,34 @@ cleanup(void)
 	XCloseDisplay(dpy);
 }
 
+static void
+updateaccent(void)
+{
+uint32_t s1, s2;
+
+if (!accentshm)
+return;
+do {
+s1 = accentshm->seq;
+memcpy(accentcol, accentshm->color, 8);
+s2 = accentshm->seq;
+} while (s1 != s2);
+drw_clr_create(drw, &scheme[SchemeSel][ColBg], accentcol);
+}
+
+static void
+initaccent(void)
+{
+int fd = shm_open(SHMNAME, O_RDONLY, 0);
+if (fd >= 0) {
+accentshm = mmap(NULL, sizeof(ColorShm), PROT_READ,
+ MAP_SHARED, fd, 0);
+if (accentshm == MAP_FAILED)
+accentshm = NULL;
+close(fd);
+}
+updateaccent();
+}
 static char *
 cistrstr(const char *h, const char *n)
 {
@@ -575,39 +619,53 @@ readstdin(void)
 static void
 run(void)
 {
-	XEvent ev;
-
-	while (!XNextEvent(dpy, &ev)) {
-		if (XFilterEvent(&ev, win))
-			continue;
-		switch(ev.type) {
-		case DestroyNotify:
-			if (ev.xdestroywindow.window != win)
-				break;
-			cleanup();
-			exit(1);
-		case Expose:
-			if (ev.xexpose.count == 0)
-				drw_map(drw, win, 0, 0, mw, mh);
-			break;
-		case FocusIn:
-			/* regrab focus from parent window */
-			if (ev.xfocus.window != win)
-				grabfocus();
-			break;
-		case KeyPress:
-			keypress(&ev.xkey);
-			break;
-		case SelectionNotify:
-			if (ev.xselection.property == utf8)
-				paste();
-			break;
-		case VisibilityNotify:
-			if (ev.xvisibility.state != VisibilityUnobscured)
-				XRaiseWindow(dpy, win);
-			break;
-		}
-	}
+        XEvent ev;
+        int xfd;
+        fd_set fds;
+        struct timeval tv;
+
+        xfd = ConnectionNumber(dpy);
+        for (;;) {
+                FD_ZERO(&fds);
+                FD_SET(xfd, &fds);
+                tv.tv_sec = 0;
+                tv.tv_usec = 50000;
+                if (select(xfd + 1, &fds, NULL, NULL, &tv) > 0) {
+                        while (XPending(dpy)) {
+                                XNextEvent(dpy, &ev);
+                                if (XFilterEvent(&ev, win))
+                                        continue;
+                                switch (ev.type) {
+                                case DestroyNotify:
+                                        if (ev.xdestroywindow.window != win)
+                                                break;
+                                        cleanup();
+                                        exit(1);
+                                case Expose:
+                                        if (ev.xexpose.count == 0)
+                                                drw_map(drw, win, 0, 0, mw, mh);
+                                        break;
+                                case FocusIn:
+                                        if (ev.xfocus.window != win)
+                                                grabfocus();
+                                        break;
+                                case KeyPress:
+                                        keypress(&ev.xkey);
+                                        break;
+                                case SelectionNotify:
+                                        if (ev.xselection.property == utf8)
+                                                paste();
+                                        break;
+                                case VisibilityNotify:
+                                        if (ev.xvisibility.state != VisibilityUnobscured)
+                                                XRaiseWindow(dpy, win);
+                                        break;
+                                }
+                        }
+                }
+                updateaccent();
+                drawmenu();
+        }
 }
 
 static void
@@ -707,8 +765,9 @@ setup(void)
 		}
 		grabfocus();
 	}
-	drw_resize(drw, mw, mh);
-	drawmenu();
+    drw_resize(drw, mw, mh);
+    initaccent();
+    drawmenu();
 }
 
 static void
-- 
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