herbe.c

   1 #include <X11/Xlib.h>
   2 #include <X11/Xft/Xft.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <signal.h>
   6 #include <unistd.h>
   7
   8 #include "config.h"
   9
  10 Display *display;
  11 Window window;
  12
  13 void expire()
  14 {
  15         XEvent event;
  16         event.type = ButtonPress;
  17         XSendEvent(display, window, 0, 0, &event);
  18         XFlush(display);
  19 }
  20
  21 int main(int argc, char *argv[])
  22 {
  23         if (argc != 2) {
  24                 fprintf(stderr, "Usage: herbe message\n");
  25                 exit(EXIT_FAILURE);
  26         }
  27
  28         signal(SIGALRM, expire);
  29         alarm(duration);
  30
  31         display = XOpenDisplay(NULL);
  32
  33         if (display == NULL)
  34         {
  35                 fprintf(stderr, "Cannot open display\n");
  36                 exit(EXIT_FAILURE);
  37         }
  38
  39         int screen = DefaultScreen(display);
  40
  41         int window_width = DisplayWidth(display, screen);
  42         int window_height = DisplayHeight(display, screen);
  43
  44         XftColor color;
  45
  46         Window root = RootWindow(display, screen);
  47         XSetWindowAttributes attributes;
  48         attributes.override_redirect = True;
  49         XftColorAllocName(display, DefaultVisual(display, screen), DefaultColormap(display, screen), background_color, &color);
  50         attributes.background_pixel = color.pixel;
  51         XftColorAllocName(display, DefaultVisual(display, screen), DefaultColormap(display, screen), border_color, &color);
  52         attributes.border_pixel = color.pixel;
  53
  54         XftFont *font = XftFontOpenName(display, screen, font_style);
  55
  56         unsigned short x = pos_x;
  57         unsigned short y = pos_y;
  58         int height = font->ascent - font->descent + text_padding * 2;
  59         switch (corner)
  60         {
  61                 case down_right:
  62                         y = window_height - height - border_size * 2 - pos_y;
  63                 case top_right:
  64                         x = window_width - width - border_size * 2 - pos_x;
  65                         break;
  66                 case down_left:
  67                         y = window_height - height - border_size * 2 - pos_y;
  68         }
  69
  70         window = XCreateWindow(
  71                         display, root, x,
  72                         y, width, height, border_size,
  73                         DefaultDepth(display, screen), CopyFromParent,
  74                         DefaultVisual(display, screen),
  75                         CWOverrideRedirect | CWBackPixel | CWBorderPixel, &attributes);
  76
  77         XftDraw *draw = XftDrawCreate(display, window, DefaultVisual(display, screen), DefaultColormap(display, screen));
  78         XftColorAllocName(display, DefaultVisual(display, screen), DefaultColormap(display, screen), font_color, &color);
  79
  80         XSelectInput(display, window, ExposureMask | ButtonPress);
  81
  82         XMapWindow(display, window);
  83
  84         XEvent event;
  85
  86         while (1)
  87         {
  88                 XNextEvent(display, &event);
  89
  90                 if (event.type == Expose)
  91                 {
  92                         XClearWindow(display, window);
  93                         XftDrawStringUtf8(draw, &color, font, text_padding, height - text_padding, (XftChar8 *)argv[1], strlen(argv[1]));
  94                 }
  95                 if (event.type == ButtonPress)
  96                         break;
  97         }
  98
  99         XftDrawDestroy(draw);
 100         XftColorFree(display, DefaultVisual(display, screen), DefaultColormap(display, screen), &color);
 101         XftFontClose(display, font);
 102
 103         XCloseDisplay(display);
 104         return 0;
 105 }