sxalert

commit 92220f3e67c2a19d8f8fd39b9d890a7d91f3c4e1
Author: Michael Constantine Dimopoulos <mk@mcdim.xyz>
Date:   Fri,  3 Nov 2023 23:20:52 +0000

Initial working code

Diffstat:
A
Makefile
 | 
2
++
A
config.h
 | 
13
+++++++++++++
A
sxalert.c
 | 
145
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

3 files changed, 160 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile
@@ -0,0 +1,2 @@
+sxalert:
+	gcc sxalert.c -I/usr/include/freetype2/ -lXft -lX11 -lfreetype
diff --git a/config.h b/config.h
@@ -0,0 +1,13 @@
+/* simpleXalert Configuration */
+
+#define BUFFER 2054
+
+/* default appearance */
+
+static char text_color[7]	= "A0A0A0";
+static char bg_color[7]		= "300000";
+static char border_color[7]	= "530000";
+
+static int border_width	= 5;
+
+const char *fontname = "DejaVu Sans Mono:size=12:antialias=true";
diff --git a/sxalert.c b/sxalert.c
@@ -0,0 +1,145 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/Xft/Xft.h>
+
+#define VERSION "v0.1"
+
+#include "config.h"
+
+static void
+die(const char *msg, int code)
+{
+	fprintf(stderr, "%s\n", msg);
+	exit(code);
+}
+
+static void
+usage(const char *bin)
+{
+	printf("Usage: %s [arguments] \"title\" \"text\" \"text\"\n", bin);
+	exit(0);
+}
+
+static void
+help(void)
+{
+	printf("sXalert %s\n", VERSION);
+	printf("Alert utility for X\n\n");
+	printf("	-c color in hex:hex:hex format\n");
+	printf("	-s time in seconds\n");
+	printf("	-b border width in pixels\n");
+	printf("	-h print help panel & exit\n\n");
+}
+
+static int
+hex2int(char *str)
+{
+	int num;
+	sscanf(str, "%x", &num);
+	return num;
+}
+
+static void
+draw(int border, char **lines, int linecount, int linestart)
+{
+	//const char *fontname = "DejaVu Sans Mono:size=12:antialias=true";
+
+	Display *dpy = XOpenDisplay(NULL);
+	if (!dpy)
+		die("cannot open X11 display\n", EXIT_FAILURE);
+	int scr = DefaultScreen(dpy);
+	Visual *visual = DefaultVisual(dpy, scr);
+	Colormap cmap = DefaultColormap(dpy, scr);
+
+	XftColor color;
+	XGlyphInfo extents;
+	XftFont *font = XftFontOpenName(dpy, scr, fontname);
+	if (!font)
+		die("cannot load font\n", EXIT_FAILURE);
+	if (!XftColorAllocName(dpy, visual, cmap, "#ffffff", &color))
+	//if (!XftColorAllocName(dpy, visual, cmap, "#0dff00", &color))
+		die("cannot allocate xft color\n", EXIT_FAILURE);
+	XftTextExtentsUtf8(dpy, font, (XftChar8*)lines[0], strlen(lines[0]), &extents);
+    	int text_height = extents.height;
+    	int text_width = extents.width; /* for some reason this is always 61 */
+	printf("text_width: %d\n", text_width);
+
+	int height = (linecount - linestart) * (text_height * 2) + text_height;
+	printf("height:%d\n", (linecount-linestart));
+
+	Window win = XCreateSimpleWindow(dpy, RootWindow(dpy, scr), 1500, 50, 400, height, border, hex2int(border_color), hex2int(bg_color));
+	/* make window fixed */
+	XSetWindowAttributes attributes;
+	attributes.override_redirect = True;
+	XChangeWindowAttributes(dpy, win, CWOverrideRedirect, &attributes);
+
+	XSelectInput(dpy, win, ExposureMask | KeyPressMask);
+	XMapWindow(dpy, win);
+
+	XftDraw *draw = XftDrawCreate(dpy, win, visual, cmap);
+
+	while(1) {
+		XEvent ev;
+
+		XNextEvent(dpy, &ev);
+		if (ev.type == Expose) {
+			int spacing = text_height * 2;
+			for (int i=linestart; i<linecount; i++) {
+				XftDrawStringUtf8(draw, &color, font, 10, spacing, (XftChar8 *)lines[i], strlen(lines[i]));
+				spacing += text_height * 2;
+			}
+		} else if (ev.type == KeyPress) {
+			break;
+		}
+	}
+
+	/* cleanup */
+	XftColorFree(dpy, visual, cmap, &color);
+	XftDrawDestroy(draw);
+	XDestroyWindow(dpy, win);
+	XCloseDisplay(dpy);
+}
+
+int
+main(int argc, char **argv)
+{
+	int s = 3;
+	int c;
+	char text[BUFFER];
+	extern char *optarg;
+
+	printf("text_color: %s\n", text_color);
+
+	while ((c = getopt(argc, argv, "s:b:vh")) != -1 ) {
+		switch (c) {
+		case 'v':
+			die(VERSION, EXIT_SUCCESS);
+		case 'h':
+			help();
+			usage(argv[0]);
+		case 's':
+			s=atoi(optarg);
+			break;
+		case 'b':
+			border_width=atoi(optarg); /* overwrite default in config.h */
+			break;
+		}
+	}
+
+	/* can be removed */
+	/*printf("b=%d\n", border_width);
+	if (optind < argc) {
+		printf("argc=%d\n", argc);
+		printf("optind=%d\n", optind);
+		printf("optind=%s\n", argv[optind]);
+	}*/
+
+	draw(border_width, argv, argc, optind);
+
+	return 0;
+}