From 16f60c2b10a168255d8ed2675c4ef7eb092268b3 Mon Sep 17 00:00:00 2001
From: davidpkj <davidpenkow1@gmail.com>
Date: Sun, 27 Aug 2023 20:54:30 +0200
Subject: Updated to currently used version

---
 slock.c | 152 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 148 insertions(+), 4 deletions(-)

(limited to 'slock.c')

diff --git a/slock.c b/slock.c
index 2729bee..a5d915c 100644
--- a/slock.c
+++ b/slock.c
@@ -36,6 +36,9 @@ char *argv0;
 
 static time_t locktime;
 
+/* global count to prevent repeated error messages */
+int count_error = 0;
+
 enum {
 	INIT,
 	INPUT,
@@ -116,6 +119,132 @@ dontkillme(void)
 }
 #endif
 
+static int
+readescapedint(const char *str, int *i) {
+	int n = 0;
+	if (str[*i])
+		++*i;
+	while(str[*i] && str[*i] != ';' && str[*i] != 'm') {
+		n = 10 * n + str[*i] - '0';
+		++*i;
+	}
+	return n;
+}
+
+static void
+writemessage(Display *dpy, Window win, int screen)
+{
+	int len, line_len, width, height, s_width, s_height, i, k, tab_size, r, g, b, escaped_int, curr_line_len;
+	XGCValues gr_values;
+	XFontStruct *fontinfo;
+	XColor color, dummy;
+	XineramaScreenInfo *xsi;
+	GC gc;
+	fontinfo = XLoadQueryFont(dpy, font_name);
+
+	if (fontinfo == NULL) {
+		if (count_error == 0) {
+			fprintf(stderr, "slock: Unable to load font \"%s\"\n", font_name);
+			fprintf(stderr, "slock: Try listing fonts with 'slock -f'\n");
+			count_error++;
+		}
+		return;
+	}
+
+	tab_size = 8 * XTextWidth(fontinfo, " ", 1);
+
+	XAllocNamedColor(dpy, DefaultColormap(dpy, screen),
+		 text_color, &color, &dummy);
+
+	gr_values.font = fontinfo->fid;
+	gr_values.foreground = color.pixel;
+	gc=XCreateGC(dpy,win,GCFont+GCForeground, &gr_values);
+
+	/*  To prevent "Uninitialized" warnings. */
+	xsi = NULL;
+
+	/*
+	 * Start formatting and drawing text
+	 */
+
+	len = strlen(message);
+
+	/* Max max line length (cut at '\n') */
+	line_len = curr_line_len = 0;
+	k = 0;
+	for (i = 0; i < len; i++) {
+		if (message[i] == '\n') {
+			curr_line_len = 0;
+			k++;
+		} else if (message[i] == 0x1b) {
+			while (i < len && message[i] != 'm') {
+				i++;
+			}
+			if (i == len)
+				die("slock: unclosed escape sequence\n");
+		} else {
+			curr_line_len += XTextWidth(fontinfo, message + i, 1);
+			if (curr_line_len > line_len)
+				line_len = curr_line_len;
+		}
+	}
+	/* If there is only one line */
+	if (line_len == 0)
+		line_len = len;
+
+	if (XineramaIsActive(dpy)) {
+		xsi = XineramaQueryScreens(dpy, &i);
+		s_width = xsi[0].width;
+		s_height = xsi[0].height;
+	} else {
+		s_width = DisplayWidth(dpy, screen);
+		s_height = DisplayHeight(dpy, screen);
+	}
+	height = s_height*3/7 - (k*20)/3;
+	width  = (s_width - line_len)/2;
+
+	line_len = 0;
+	/* print the text while parsing 24 bit color ANSI escape codes*/
+	for (i = k = 0; i < len; i++) {
+		switch (message[i]) {
+			case '\n':
+				line_len = 0;
+				while (message[i + 1] == '\t') {
+					line_len += tab_size;
+					i++;
+				}
+				k++;
+				break;
+			case 0x1b:
+				i++;
+				if (message[i] == '[') {
+					escaped_int = readescapedint(message, &i);
+					if (escaped_int == 39)
+						continue;
+					if (escaped_int != 38)
+						die("slock: unknown escape sequence%d\n", escaped_int);
+					if (readescapedint(message, &i) != 2)
+						die("slock: only 24 bit color supported\n");
+					r = readescapedint(message, &i) & 0xff;
+					g = readescapedint(message, &i) & 0xff;
+					b = readescapedint(message, &i) & 0xff;
+					XSetForeground(dpy, gc, r << 16 | g << 8 | b);
+				} else
+					die("slock: unknown escape sequence\n");
+				break;
+			default:
+				XDrawString(dpy, win, gc, width + line_len, height + 20 * k, message + i, 1);
+				line_len += XTextWidth(fontinfo, message + i, 1);
+		}
+	}
+
+	/* xsi should not be NULL anyway if Xinerama is active, but to be safe */
+	if (XineramaIsActive(dpy) && xsi != NULL)
+			XFree(xsi);
+}
+
+
+
 static const char *
 gethash(void)
 {
@@ -463,7 +592,7 @@ config_init(Display *dpy)
 static void
 usage(void)
 {
-	die("usage: slock [-v] [cmd [arg ...]]\n");
+	die("usage: slock [-v] [-f] [-m message] [cmd [arg ...]]\n");
 }
 
 int
@@ -476,12 +605,25 @@ main(int argc, char **argv) {
 	gid_t dgid;
 	const char *hash;
 	Display *dpy;
-	int s, nlocks, nscreens;
+	int i, s, nlocks, nscreens;
+	int count_fonts;
+	char **font_names;
 
 	ARGBEGIN {
 	case 'v':
 		fprintf(stderr, "slock-"VERSION"\n");
 		return 0;
+	case 'm':
+		message = EARGF(usage());
+		break;
+	case 'f':
+		if (!(dpy = XOpenDisplay(NULL)))
+			die("slock: cannot open display\n");
+		font_names = XListFonts(dpy, "*", 10000 /* list 10000 fonts*/, &count_fonts);
+		for (i=0; i<count_fonts; i++) {
+			fprintf(stderr, "%s\n", *(font_names+i));
+		}
+		return 0;
 	default:
 		usage();
 	} ARGEND
@@ -582,10 +724,12 @@ main(int argc, char **argv) {
 	if (!(locks = calloc(nscreens, sizeof(struct lock *))))
 		die("slock: out of memory\n");
 	for (nlocks = 0, s = 0; s < nscreens; s++) {
-		if ((locks[s] = lockscreen(dpy, &rr, s)) != NULL)
+		if ((locks[s] = lockscreen(dpy, &rr, s)) != NULL) {
+			writemessage(dpy, locks[s]->win, s);
 			nlocks++;
-		else
+		} else {
 			break;
+		}
 	}
 	XSync(dpy, 0);
 
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