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/* xscreensaver, Copyright (c) 1997 Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* Wendy, let me explain something to you. Whenever you come in here and
* interrupt me, you're BREAKING my CONCENTRATION. You're DISTRACTING me!
* And it will then take me time to get back to where I was. You understand?
* Now, we're going to make a new rule. When you come in here and you hear
* me typing, or whether you DON'T hear me typing, or whatever the FUCK you
* hear me doing; when I'm in here, it means that I am working, THAT means
* don't come in! Now, do you think you can handle that?
*/
#include <ctype.h>
#include "screenhack.h"
char *progclass = "XJack";
char *defaults [] = {
".background: #FFF0B4",
".foreground: #000000",
"XJack.font: -*-courier-medium-r-*-*-*-240-*-*-m-*-*-*",
"*delay: 50000",
0
};
XrmOptionDescRec options [] = {
{ "-delay", ".delay", XrmoptionSepArg, 0 },
{ "-font", ".font", XrmoptionSepArg, 0 },
{ 0, 0, 0, 0 }
};
void
screenhack (Display *dpy, Window window)
{
static const char *source = "All work and no play makes Jack a dull boy. ";
/* If you're here because you're thinking about making the above string be
customizable, then you don't get the joke. You loser. */
const char *s = source;
int columns, rows; /* characters */
int left, right; /* characters */
int char_width, line_height; /* pixels */
int x, y; /* characters */
int mode = 0;
int hspace = 15; /* pixels */
int vspace = 15; /* pixels */
Bool break_para = True;
Bool caps = False;
int sentences = 0;
int paras = 0;
XWindowAttributes xgwa;
XGCValues gcv;
GC gc;
int delay = get_integer_resource ("delay", "Integer");
char *fontname = get_string_resource ("font", "Font");
XFontStruct *font = XLoadQueryFont (dpy, fontname);
if (!font)
font = XLoadQueryFont (dpy, "-*-*-medium-r-*-*-*-240-*-*-m-*-*-*");
if (!font)
font = XLoadQueryFont (dpy, "-*-courier-medium-r-*-*-*-180-*-*-m-*-*-*");
if (!font)
font = XLoadQueryFont (dpy, "-*-*-*-r-*-*-*-240-*-*-m-*-*-*");
if (!font)
{
fprintf(stderr, "no big fixed-width font like \"%s\"\n", fontname);
exit(1);
}
XGetWindowAttributes (dpy, window, &xgwa);
gcv.font = font->fid;
gcv.foreground = get_pixel_resource ("foreground", "Foreground", dpy,
xgwa.colormap);
gcv.background = get_pixel_resource ("background", "Background", dpy,
xgwa.colormap);
gc = XCreateGC (dpy, window, (GCFont | GCForeground | GCBackground), &gcv);
char_width = (font->per_char
? font->per_char['n'-font->min_char_or_byte2].rbearing
: font->min_bounds.rbearing);
line_height = font->ascent + font->descent + 1;
columns = (xgwa.width - hspace - hspace) / char_width;
rows = (xgwa.height - vspace - vspace) / line_height;
left = 0xFF & (random() % ((columns / 2)+1));
right = left + (0xFF & (random() % (columns - left - 10)+10));
x = 0;
y = 0;
while (1)
{
int word_length = 0;
const char *s2;
for (s2 = s; *s2 && *s2 != ' '; s2++)
word_length++;
if (break_para ||
(*s != ' ' &&
(x + word_length) >= right))
{
x = left;
y++;
if (break_para)
y++;
if (mode == 1 || mode == 2)
{
/* 1 = left margin goes southwest; 2 = southeast */
left += (mode == 1 ? 1 : -1);
if (left >= right - 10)
{
if ((right < (columns - 10)) && (random() & 1))
right += (0xFF & (random() % (columns - right)));
else
mode = 2;
}
else if (left <= 0)
{
left = 0;
mode = 1;
}
}
else if (mode == 3 || mode == 4)
{
/* 3 = right margin goes southeast; 4 = southwest */
right += (mode == 3 ? 1 : -1);
if (right >= columns)
{
right = columns;
mode = 4;
}
else if (right <= left + 10)
mode = 3;
}
if (y >= rows) /* bottom of page */
{
/* scroll by 1-5 lines */
int lines = (random() % 5 ? 0 : (0xFF & (random() % 5))) + 1;
if (break_para)
lines++;
/* but sometimes scroll by a whole page */
if (0 == (random() % 100))
lines += rows;
while (lines > 0)
{
int i;
int inc = line_height / 7;
int pix_delay = delay / 1000;
if (inc <= 0) inc = 1;
for (i = 0; i < line_height; i += inc)
{
if (i > line_height)
i = line_height;
XCopyArea (dpy, window, window, gc,
0, inc,
xgwa.width, xgwa.height - inc,
0, 0);
XSync (dpy, False);
if (pix_delay) usleep (pix_delay);
}
y--;
lines--;
/* See? It's OK. He saw it on the television. */
XClearArea (dpy, window,
0, xgwa.height - vspace - line_height,
xgwa.width, line_height + vspace + vspace,
False);
XSync (dpy, False);
XGetWindowAttributes (dpy, window, &xgwa);
columns = (xgwa.width - hspace - hspace) / char_width;
rows = (xgwa.height - vspace - vspace) / line_height;
if (y > rows) y = rows-1;
if (x > columns) x = columns-2;
if (delay) usleep (delay);
}
if (y < 0) y = 0;
}
break_para = False;
}
if (*s != ' ')
{
char c = *s;
int xshift = 0, yshift = 0;
if (0 == random() % 50)
{
xshift = random() % ((char_width / 3) + 1); /* mis-strike */
yshift = random() % ((line_height / 6) + 1);
if (0 == (random() % 3))
yshift *= 2;
if (random() & 1)
xshift = -xshift;
if (random() & 1)
yshift = -yshift;
}
if (0 == (random() % 250)) /* introduce adjascent-key typo */
{
static const char * const typo[] = {
"asqw", "ASQW", "bgvhn", "cxdfv", "dserfcx", "ewsdrf",
"Jhuikmn", "kjiol,m", "lkop;.,", "mnjk,", "nbhjm", "oiklp09",
"pol;(-0", "redft54", "sawedxz", "uyhji87", "wqase32",
"yuhgt67", ".,l;/", 0 };
int i = 0;
while (typo[i] && typo[i][0] != c)
i++;
if (typo[i])
c = typo[i][0xFF & ((random() % strlen(typo[i]+1)) + 1)];
}
/* caps typo */
if (c >= 'a' && c <= 'z' && (caps || 0 == (random() % 350)))
{
c -= ('a'-'A');
if (c == 'O' && random() & 1)
c = '0';
}
OVERSTRIKE:
XDrawString (dpy, window, gc,
(x * char_width) + hspace + xshift,
(y * line_height) + vspace + font->ascent + yshift,
&c, 1);
if (xshift == 0 && yshift == 0 && (0 == (random() & 3000)))
{
if (random() & 1)
xshift--;
else
yshift--;
goto OVERSTRIKE;
}
if ((tolower(c) != tolower(*s))
? (0 == (random() % 10)) /* backup to correct */
: (0 == (random() % 400))) /* fail to advance */
{
x--;
s--;
XSync (dpy, False);
if (delay) usleep (0xFFFF & (delay + (random() % (delay * 10))));
}
}
x++;
s++;
if (0 == random() % 200)
{
if (random() & 1 && s != source)
s--; /* duplicate character */
else if (*s)
s++; /* skip character */
}
if (*s == 0)
{
sentences++;
caps = (0 == random() % 40); /* capitalize sentence */
if (0 == (random() % 10) || /* randomly break paragraph */
(mode == 0 &&
((0 == (random() % 10)) || sentences > 20)))
{
break_para = True;
sentences = 0;
paras++;
if (random() & 1) /* mode=0 50% of the time */
mode = 0;
else
mode = (0xFF & (random() % 5));
if (0 == (random() % 2)) /* re-pick margins */
{
left = 0xFF & (random() % (columns / 3));
right = columns - (0xFF & (random() % (columns / 3)));
if (0 == random() % 3) /* sometimes be wide */
right = left + ((right - left) / 2);
}
if (right - left <= 10) /* introduce sanity */
{
left = 0;
right = columns;
}
if (right - left > 50) /* if wide, shrink and move */
{
left += (0xFF & (random() % ((columns - 50) + 1)));
right = left + (0xFF & ((random() % 40) + 10));
}
/* oh, gag. */
if (mode == 0 &&
right - left < 25 &&
columns > 40)
{
right += 20;
if (right > columns)
left -= (right - columns);
}
}
s = source;
}
XSync (dpy, False);
if (delay)
{
usleep (delay);
if (0 == random() % 3)
usleep(0xFFFFFF & ((random() % (delay * 5)) + 1));
if (break_para)
usleep(0xFFFFFF & ((random() % (delay * 15)) + 1));
}
if (paras > 5 &&
(0 == (random() % 1000)) &&
y < rows-5)
{
int i;
int n = random() & 3;
y++;
for (i = 0; i < n; i++)
{
/* See also http://catalog.com/hopkins/unix-haters/login.html */
const char *n1 =
"NFS server overlook not responding, still trying...";
const char *n2 = "NFS server overlook ok.";
while (*n1)
{
XDrawString (dpy, window, gc,
(x * char_width) + hspace,
(y * line_height) + vspace + font->ascent,
n1, 1);
x++;
if (x >= columns) x = 0, y++;
n1++;
}
XSync (dpy, False);
usleep (5000000);
while (*n2)
{
XDrawString (dpy, window, gc,
(x * char_width) + hspace,
(y * line_height) + vspace + font->ascent,
n2, 1);
x++;
if (x >= columns) x = 0, y++;
n2++;
}
y++;
XSync (dpy, False);
usleep (500000);
}
}
screenhack_handle_events (dpy);
}
}
|