commit caf58caa5da948e97030121d3c4c24b95c338c48
Author: Matthew Carlson <matt@mcarlson.xyz>
Date: Sat, 3 Jul 2021 01:42:15 +0000
herbe
Diffstat:
| A | Makefile | | | 21 | +++++++++++++++++++++ |
| A | config.h | | | 19 | +++++++++++++++++++ |
| A | herbe.c | | | 221 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
3 files changed, 261 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile
@@ -0,0 +1,21 @@
+CFLAGS = -Wall -Wextra -pedantic -lX11 -lXft -I/usr/include/freetype2 -pthread
+
+PREFIX ?= /usr/local
+CC ?= cc
+
+all: herbe
+
+herbe: herbe.c config.h
+ $(CC) herbe.c $(CFLAGS) -o herbe
+
+install: herbe
+ mkdir -p ${DESTDIR}${PREFIX}/bin
+ cp -f herbe ${DESTDIR}${PREFIX}/bin
+
+uninstall:
+ rm -f ${DESTDIR}${PREFIX}/bin/herbe
+
+clean:
+ rm -f herbe
+
+.PHONY: all install uninstall clean
diff --git a/config.h b/config.h
@@ -0,0 +1,19 @@
+static const char *background_color = "#3e3e3e";
+static const char *border_color = "#ececec";
+static const char *font_color = "#ececec";
+static const char *font_pattern = "monospace:size=10";
+static const unsigned line_spacing = 5;
+static const unsigned int padding = 15;
+
+static const unsigned int width = 450;
+static const unsigned int border_size = 2;
+static const unsigned int pos_x = 30;
+static const unsigned int pos_y = 60;
+
+enum corners { TOP_LEFT, TOP_RIGHT, BOTTOM_LEFT, BOTTOM_RIGHT };
+enum corners corner = TOP_RIGHT;
+
+static const unsigned int duration = 5; /* in seconds */
+
+#define DISMISS_BUTTON Button1
+#define ACTION_BUTTON Button3
diff --git a/herbe.c b/herbe.c
@@ -0,0 +1,220 @@
+#include <X11/Xlib.h>
+#include <X11/Xft/Xft.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdarg.h>
+#include <fcntl.h>
+#include <semaphore.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);
+}
+
+int main(int argc, char *argv[])
+{
+ if (argc == 1)
+ {
+ sem_unlink("/herbe");
+ 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_width = DisplayWidth(display, screen);
+ int screen_height = DisplayHeight(display, screen);
+
+ 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';
+ }
+ }
+
+ unsigned int x = pos_x;
+ unsigned int y = pos_y;
+ unsigned int text_height = font->ascent - font->descent;
+ unsigned int height = (num_of_lines - 1) * line_spacing + num_of_lines * text_height + 2 * padding;
+
+ if (corner == TOP_RIGHT || corner == BOTTOM_RIGHT)
+ x = screen_width - width - border_size * 2 - pos_x;
+
+ if (corner == BOTTOM_LEFT || corner == BOTTOM_RIGHT)
+ 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);
+
+ sem_t *mutex = sem_open("/herbe", O_CREAT, 0644, 1);
+ sem_wait(mutex);
+
+ 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;
+ }
+ }
+ }
+
+ sem_post(mutex);
+ sem_close(mutex);
+
+ for (int i = 0; i < num_of_lines; i++)
+ free(lines[i]);
+
+ free(lines);
+ XftDrawDestroy(draw);
+ XftColorFree(display, visual, colormap, &color);
+ XftFontClose(display, font);
+ XCloseDisplay(display);
+
+ return exit_code;
+}
+\ No newline at end of file
