config

1 files changed, 248 insertions, 0 deletions

diff --git a/herbe.c b/herbe.c
new file mode 100644
index 0000000..3936f9d
--- /dev/null
+++ b/herbe.c
@@ -0,0 +1,248 @@
+#include <X11/Xlib.h>
+#include <X11/Xft/Xft.h>
+#include <X11/extensions/Xrandr.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdarg.h>
+#include <fcntl.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+
+#include "config.h"
+
+#define EXIT_ACTION 0
+#define EXIT_FAIL 1
+#define EXIT_DISMISS 2
+
+Display *display;
+Window window;
+int exit_code = EXIT_DISMISS;
+
+static void die(const char *format, ...)
+{
+	va_list ap;
+	va_start(ap, format);
+	vfprintf(stderr, format, ap);
+	fprintf(stderr, "\n");
+	va_end(ap);
+	exit(EXIT_FAIL);
+}
+
+int get_max_len(char *string, XftFont *font, int max_text_width)
+{
+	int eol = strlen(string);
+	XGlyphInfo info;
+	XftTextExtentsUtf8(display, font, (FcChar8 *)string, eol, &info);
+
+	if (info.width > max_text_width)
+	{
+		eol = max_text_width / font->max_advance_width;
+		info.width = 0;
+
+		while (info.width < max_text_width)
+		{
+			eol++;
+			XftTextExtentsUtf8(display, font, (FcChar8 *)string, eol, &info);
+		}
+
+		eol--;
+	}
+
+	for (int i = 0; i < eol; i++)
+		if (string[i] == '\n')
+		{
+			string[i] = ' ';
+			return ++i;
+		}
+
+	if (info.width <= max_text_width)
+		return eol;
+
+	int temp = eol;
+
+	while (string[eol] != ' ' && eol)
+		--eol;
+
+	if (eol == 0)
+		return temp;
+	else
+		return ++eol;
+}
+
+void expire(int sig)
+{
+	XEvent event;
+	event.type = ButtonPress;
+	event.xbutton.button = (sig == SIGUSR2) ? (ACTION_BUTTON) : (DISMISS_BUTTON);
+	XSendEvent(display, window, 0, 0, &event);
+	XFlush(display);
+}
+
+void read_y_offset(unsigned int **offset, int *id) {
+    int shm_id = shmget(8432, sizeof(unsigned int), IPC_CREAT | 0660);
+    if (shm_id == -1) die("shmget failed");
+
+    *offset = (unsigned int *)shmat(shm_id, 0, 0);
+    if (*offset == (unsigned int *)-1) die("shmat failed\n");
+    *id = shm_id;
+}
+
+void free_y_offset(int id) {
+    shmctl(id, IPC_RMID, NULL);
+}
+
+int main(int argc, char *argv[])
+{
+	if (argc == 1)
+        die("Usage: %s body", argv[0]);
+
+	struct sigaction act_expire, act_ignore;
+
+	act_expire.sa_handler = expire;
+	act_expire.sa_flags = SA_RESTART;
+	sigemptyset(&act_expire.sa_mask);
+
+	act_ignore.sa_handler = SIG_IGN;
+	act_ignore.sa_flags = 0;
+	sigemptyset(&act_ignore.sa_mask);
+
+	sigaction(SIGALRM, &act_expire, 0);
+	sigaction(SIGTERM, &act_expire, 0);
+	sigaction(SIGINT, &act_expire, 0);
+
+	sigaction(SIGUSR1, &act_ignore, 0);
+	sigaction(SIGUSR2, &act_ignore, 0);
+
+	if (!(display = XOpenDisplay(0)))
+		die("Cannot open display");
+
+	int screen = DefaultScreen(display);
+	Visual *visual = DefaultVisual(display, screen);
+	Colormap colormap = DefaultColormap(display, screen);
+
+	int screen_x = 0;
+	int screen_y = 0;
+	int screen_width = DisplayWidth(display, screen);
+	int screen_height = DisplayHeight(display, screen);
+	if(use_primary_monitor) {
+		int nMonitors;
+		XRRMonitorInfo* info = XRRGetMonitors(display, RootWindow(display, screen), 1, &nMonitors);
+		for(int i = 0; i < nMonitors; i++) {
+			if(info[i].primary) {
+				screen_x = info[i].x;
+				screen_y = info[i].y;
+				screen_width = info[i].width;
+				screen_height = info[i].height;
+			}
+		}
+	}
+
+	XSetWindowAttributes attributes;
+	attributes.override_redirect = True;
+	XftColor color;
+	XftColorAllocName(display, visual, colormap, background_color, &color);
+	attributes.background_pixel = color.pixel;
+	XftColorAllocName(display, visual, colormap, border_color, &color);
+	attributes.border_pixel = color.pixel;
+
+	int num_of_lines = 0;
+	int max_text_width = width - 2 * padding;
+	int lines_size = 5;
+	char **lines = malloc(lines_size * sizeof(char *));
+	if (!lines)
+		die("malloc failed");
+
+	XftFont *font = XftFontOpenName(display, screen, font_pattern);
+
+	for (int i = 1; i < argc; i++)
+	{
+		for (unsigned int eol = get_max_len(argv[i], font, max_text_width); eol; argv[i] += eol, num_of_lines++, eol = get_max_len(argv[i], font, max_text_width))
+		{
+			if (lines_size <= num_of_lines)
+			{
+				lines = realloc(lines, (lines_size += 5) * sizeof(char *));
+				if (!lines)
+					die("realloc failed");
+			}
+
+			lines[num_of_lines] = malloc((eol + 1) * sizeof(char));
+			if (!lines[num_of_lines])
+				die("malloc failed");
+
+			strncpy(lines[num_of_lines], argv[i], eol);
+			lines[num_of_lines][eol] = '\0';
+		}
+	}
+
+    int y_offset_id;
+    unsigned int *y_offset;
+    read_y_offset(&y_offset, &y_offset_id);
+
+	unsigned int text_height = font->ascent - font->descent;
+	unsigned int height = (num_of_lines - 1) * line_spacing + num_of_lines * text_height + 2 * padding;
+	unsigned int x = screen_x + pos_x;
+	unsigned int y = screen_y + pos_y + *y_offset;
+
+    unsigned int used_y_offset = (*y_offset) += height + padding;
+
+	if (corner == TOP_RIGHT || corner == BOTTOM_RIGHT)
+		x = screen_x + screen_width - width - border_size * 2 - pos_x;
+
+	if (corner == BOTTOM_LEFT || corner == BOTTOM_RIGHT)
+		y = screen_y + screen_height - height - border_size * 2 - pos_y;
+
+	window = XCreateWindow(display, RootWindow(display, screen), x, y, width, height, border_size, DefaultDepth(display, screen),
+						   CopyFromParent, visual, CWOverrideRedirect | CWBackPixel | CWBorderPixel, &attributes);
+
+	XftDraw *draw = XftDrawCreate(display, window, visual, colormap);
+	XftColorAllocName(display, visual, colormap, font_color, &color);
+
+	XSelectInput(display, window, ExposureMask | ButtonPress);
+	XMapWindow(display, window);
+
+	sigaction(SIGUSR1, &act_expire, 0);
+	sigaction(SIGUSR2, &act_expire, 0);
+
+	if (duration != 0)
+		alarm(duration);
+
+	for (;;)
+	{
+		XEvent event;
+		XNextEvent(display, &event);
+
+		if (event.type == Expose)
+		{
+			XClearWindow(display, window);
+			for (int i = 0; i < num_of_lines; i++)
+				XftDrawStringUtf8(draw, &color, font, padding, line_spacing * i + text_height * (i + 1) + padding,
+								  (FcChar8 *)lines[i], strlen(lines[i]));
+		}
+		else if (event.type == ButtonPress)
+		{
+			if (event.xbutton.button == DISMISS_BUTTON)
+				break;
+			else if (event.xbutton.button == ACTION_BUTTON)
+			{
+				exit_code = EXIT_ACTION;
+				break;
+			}
+		}
+	}
+
+
+	for (int i = 0; i < num_of_lines; i++)
+		free(lines[i]);
+
+    if (used_y_offset == *y_offset) free_y_offset(y_offset_id);
+	free(lines);
+	XftDrawDestroy(draw);
+	XftColorFree(display, visual, colormap, &color);
+	XftFontClose(display, font);
+	XCloseDisplay(display);
+
+	return exit_code;
+}