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         {
  25                 fprintf(stderr, "Usage: herbe message\n");
  26                 exit(EXIT_FAILURE);
  27         }
  28
  29         signal(SIGALRM, expire);
  30         alarm(duration);
  31
  32         display = XOpenDisplay(NULL);
  33
  34         if (display == NULL)
  35         {
  36                 fprintf(stderr, "Cannot open display\n");
  37                 exit(EXIT_FAILURE);
  38         }
  39
  40         int screen = DefaultScreen(display);
  41         Visual *visual = DefaultVisual(display, screen);
  42         Colormap colormap = DefaultColormap(display, screen);
  43
  44         int window_width = DisplayWidth(display, screen);
  45         int window_height = DisplayHeight(display, screen);
  46
  47         XftColor color;
  48
  49         XSetWindowAttributes attributes;
  50         attributes.override_redirect = True;
  51         XftColorAllocName(display, visual, colormap, background_color, &color);
  52         attributes.background_pixel = color.pixel;
  53         XftColorAllocName(display, visual, colormap, border_color, &color);
  54         attributes.border_pixel = color.pixel;
  55
  56         XftFont *font = XftFontOpenName(display, screen, font_pattern);
  57
  58         unsigned short x = pos_x;
  59         unsigned short y = pos_y;
  60         unsigned short height = font->ascent - font->descent + padding * 2;
  61
  62         switch (corner)
  63         {
  64         case BOTTOM_RIGHT:
  65                 y = window_height - height - border_size * 2 - pos_y;
  66         case TOP_RIGHT:
  67                 x = window_width - width - border_size * 2 - pos_x;
  68                 break;
  69         case BOTTOM_LEFT:
  70                 y = window_height - height - border_size * 2 - pos_y;
  71         }
  72
  73         window = XCreateWindow(
  74                 display, RootWindow(display, screen), x,
  75                 y, width, height, border_size,
  76                 DefaultDepth(display, screen), CopyFromParent,
  77                 visual,
  78                 CWOverrideRedirect | CWBackPixel | CWBorderPixel, &attributes);
  79
  80         XftDraw *draw = XftDrawCreate(display, window, visual, colormap);
  81         XftColorAllocName(display, visual, colormap, font_color, &color);
  82
  83         XSelectInput(display, window, ExposureMask | ButtonPress);
  84
  85         XMapWindow(display, window);
  86
  87         XEvent event;
  88
  89         while (1)
  90         {
  91                 XNextEvent(display, &event);
  92
  93                 if (event.type == Expose)
  94                 {
  95                         XClearWindow(display, window);
  96                         XftDrawStringUtf8(draw, &color, font, padding, height - padding, (XftChar8 *)argv[1], strlen(argv[1]));
  97                 }
  98                 if (event.type == ButtonPress)
  99                         break;
 100         }
 101
 102         XftDrawDestroy(draw);
 103         XftColorFree(display, visual, colormap, &color);
 104         XftFontClose(display, font);
 105
 106         XCloseDisplay(display);
 107         return EXIT_SUCCESS;
 108 }