-/* xscreensaver, Copyright (c) 1997 Jamie Zawinski <jwz@jwz.org>
+/* xscreensaver, Copyright (c) 1997, 2006 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
#include <ctype.h>
#include "screenhack.h"
-char *progclass = "XJack";
+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. */
-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 }
-};
+struct state {
+ Display *dpy;
+ Window window;
+ XWindowAttributes xgwa;
+ XFontStruct *font;
+ GC gc;
-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;
+ const char *s;
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;
+ int mode;
+ int hspace; /* pixels */
+ int vspace; /* pixels */
+ Bool break_para;
+ Bool caps;
+ int sentences;
+ int paras;
+ int scrolling;
+ int subscrolling;
+ int pining;
+
+ int delay;
+};
- XWindowAttributes xgwa;
+
+static void
+xjack_reshape (Display *dpy, Window window, void *closure,
+ unsigned int w, unsigned int h)
+{
+ struct state *st = (struct state *) closure;
+ XGetWindowAttributes (st->dpy, st->window, &st->xgwa);
+ st->columns = (st->xgwa.width - st->hspace - st->hspace) / st->char_width;
+ st->rows = (st->xgwa.height - st->vspace - st->vspace) / st->line_height;
+ st->rows--;
+ st->columns--;
+
+ if (st->y > st->rows) st->y = st->rows-1;
+ if (st->x > st->columns) st->x = st->columns-2;
+
+ if (st->right > st->columns) st->right = st->columns;
+ if (st->left > st->columns-20) st->left = st->columns-20;
+ if (st->left < 0) st->left = 0;
+}
+
+
+static void *
+xjack_init (Display *dpy, Window window)
+{
+ struct state *st = (struct state *) calloc (1, sizeof(*st));
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)
+ char *fontname;
+
+ st->dpy = dpy;
+ st->window = window;
+ st->s = source;
+ st->delay = get_integer_resource (st->dpy, "delay", "Integer");
+ fontname = get_string_resource (st->dpy, "font", "Font");
+ st->font = XLoadQueryFont (st->dpy, fontname);
+
+ if (!st->font)
+ st->font = XLoadQueryFont (st->dpy, "-*-*-medium-r-*-*-*-240-*-*-m-*-*-*");
+ if (!st->font)
+ st->font = XLoadQueryFont (st->dpy,
+ "-*-courier-medium-r-*-*-*-180-*-*-m-*-*-*");
+ if (!st->font)
+ st->font = XLoadQueryFont (st->dpy, "-*-*-*-r-*-*-*-240-*-*-m-*-*-*");
+ if (!st->font)
{
fprintf(stderr, "no big fixed-width font like \"%s\"\n", fontname);
exit(1);
}
- XGetWindowAttributes (dpy, window, &xgwa);
+ XGetWindowAttributes (st->dpy, st->window, &st->xgwa);
+
+ gcv.font = st->font->fid;
+ gcv.foreground = get_pixel_resource (st->dpy, st->xgwa.colormap,
+ "foreground", "Foreground");
+ gcv.background = get_pixel_resource (st->dpy, st->xgwa.colormap,
+ "background", "Background");
+ st->gc = XCreateGC (st->dpy, st->window,
+ (GCFont | GCForeground | GCBackground), &gcv);
+
+ st->char_width =
+ (st->font->per_char
+ ? st->font->per_char['n'-st->font->min_char_or_byte2].rbearing
+ : st->font->min_bounds.rbearing);
+ st->line_height = st->font->ascent + st->font->descent + 1;
- 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);
+ xjack_reshape (dpy, window, st, st->xgwa.width, st->xgwa.height);
- 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;
+ st->left = 0xFF & (random() % ((st->columns / 2)+1));
+ st->right = st->left + (0xFF & (random() % (st->columns - st->left - 10)
+ + 10));
+ st->x = 0;
+ st->y = 0;
- columns = (xgwa.width - hspace - hspace) / char_width;
- rows = (xgwa.height - vspace - vspace) / line_height;
+ if (st->xgwa.width > 200 && st->xgwa.height > 200)
+ st->hspace = st->vspace = 40;
- left = 0xFF & (random() % ((columns / 2)+1));
- right = left + (0xFF & (random() % (columns - left - 10)+10));
- x = 0;
- y = 0;
+ return st;
+}
- while (1)
+static unsigned long
+xjack_scroll (struct state *st)
+{
+ st->break_para = 0;
+ if (st->subscrolling)
{
- 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);
+ int inc = st->line_height / 7;
+ XCopyArea (st->dpy, st->window, st->window, st->gc,
+ 0, inc,
+ st->xgwa.width, st->xgwa.height - inc,
+ 0, 0);
+
+ /* See? It's OK. He saw it on the television. */
+ XClearArea (st->dpy, st->window,
+ 0, st->xgwa.height - inc, st->xgwa.width, inc,
+ False);
+
+ st->subscrolling -= inc;
+ if (st->subscrolling <= 0)
+ st->subscrolling = 0;
+ if (st->subscrolling == 0)
+ {
+ if (st->scrolling > 0)
+ st->scrolling--;
+ st->y--;
+ }
+ return st->delay / 1000;
}
+ else if (st->scrolling)
+ st->subscrolling = st->line_height;
+
+ if (st->y < 0)
+ st->y = 0;
+ else if (st->y >= st->rows-1)
+ st->y = st->rows-1;
+
+ return st->delay;
}
+
+static unsigned long
+xjack_pine (struct state *st)
+{
+ /* 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.";
+ int prev = st->pining;
+
+ if (!st->pining)
+ st->pining = 1 + (random() % 3);
+
+ if (prev)
+ while (*n2)
+ {
+ XDrawString (st->dpy, st->window, st->gc,
+ (st->x * st->char_width) + st->hspace,
+ ((st->y * st->line_height) + st->vspace
+ + st->font->ascent),
+ (char *) n2, 1);
+ st->x++;
+ if (st->x >= st->columns) st->x = 0, st->y++;
+ n2++;
+ }
+ st->y++;
+ st->x = 0;
+ st->pining--;
+
+ if (st->pining)
+ while (*n1)
+ {
+ XDrawString (st->dpy, st->window, st->gc,
+ (st->x * st->char_width) + st->hspace,
+ ((st->y * st->line_height) + st->vspace
+ + st->font->ascent),
+ (char *) n1, 1);
+ st->x++;
+ if (st->x >= st->columns) st->x = 0, st->y++;
+ n1++;
+ }
+
+ return 5000000;
+}
+
+
+static unsigned long
+xjack_draw (Display *dpy, Window window, void *closure)
+{
+ struct state *st = (struct state *) closure;
+ int this_delay = st->delay;
+ int word_length = 0;
+ const char *s2;
+
+ if (st->scrolling)
+ return xjack_scroll (st);
+ if (st->pining)
+ return xjack_pine (st);
+
+ for (s2 = st->s; *s2 && *s2 != ' '; s2++)
+ word_length++;
+
+ if (st->break_para ||
+ (*st->s != ' ' &&
+ (st->x + word_length) >= st->right))
+ {
+ st->x = st->left;
+ st->y++;
+
+ if (st->break_para)
+ st->y++;
+
+ if (st->mode == 1 || st->mode == 2)
+ {
+ /* 1 = left margin goes southwest; 2 = southeast */
+ st->left += (st->mode == 1 ? 1 : -1);
+ if (st->left >= st->right - 10)
+ {
+ if ((st->right < (st->columns - 10)) && (random() & 1))
+ st->right += (0xFF & (random() % (st->columns - st->right)));
+ else
+ st->mode = 2;
+ }
+ else if (st->left <= 0)
+ {
+ st->left = 0;
+ st->mode = 1;
+ }
+ }
+ else if (st->mode == 3 || st->mode == 4)
+ {
+ /* 3 = right margin goes southeast; 4 = southwest */
+ st->right += (st->mode == 3 ? 1 : -1);
+ if (st->right >= st->columns)
+ {
+ st->right = st->columns;
+ st->mode = 4;
+ }
+ else if (st->right <= st->left + 10)
+ st->mode = 3;
+ }
+
+ if (st->y >= st->rows-1) /* bottom of page */
+ {
+ /* scroll by 1-5 lines */
+ st->scrolling = (random() % 5 ? 0 : (0xFF & (random() % 5))) + 1;
+ if (st->break_para)
+ st->scrolling++;
+
+ /* but sometimes scroll by a whole page */
+ if (0 == (random() % 100))
+ st->scrolling += st->rows;
+
+ return xjack_scroll (st);
+ }
+ }
+
+ if (*st->s != ' ')
+ {
+ char c = *st->s;
+ int xshift = 0, yshift = 0;
+ if (0 == random() % 50)
+ {
+ xshift = random() % ((st->char_width / 3) + 1); /* mis-strike */
+ yshift = random() % ((st->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' && (st->caps || 0 == (random() % 350)))
+ {
+ c -= ('a'-'A');
+ if (c == 'O' && random() & 1)
+ c = '0';
+ }
+
+ OVERSTRIKE:
+ XDrawString (st->dpy, st->window, st->gc,
+ (st->x * st->char_width) + st->hspace + xshift,
+ ((st->y * st->line_height) + st->vspace + st->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(*st->s))
+ ? (0 == (random() % 10)) /* backup to correct */
+ : (0 == (random() % 400))) /* fail to advance */
+ {
+ st->x--;
+ st->s--;
+ if (st->delay)
+ st->delay += (0xFFFF & (st->delay +
+ (random() % (st->delay * 10))));
+ }
+ }
+
+ st->x++;
+ st->s++;
+
+ if (0 == random() % 200)
+ {
+ if (random() & 1 && st->s != source)
+ st->s--; /* duplicate character */
+ else if (*st->s)
+ st->s++; /* skip character */
+ }
+
+ if (*st->s == 0)
+ {
+ st->sentences++;
+ st->caps = (0 == random() % 40); /* capitalize sentence */
+
+ if (0 == (random() % 10) || /* randomly break paragraph */
+ (st->mode == 0 &&
+ ((0 == (random() % 10)) || st->sentences > 20)))
+ {
+ st->break_para = True;
+ st->sentences = 0;
+ st->paras++;
+
+ if (random() & 1) /* mode=0 50% of the time */
+ st->mode = 0;
+ else
+ st->mode = (0xFF & (random() % 5));
+
+ if (0 == (random() % 2)) /* re-pick margins */
+ {
+ st->left = 0xFF & (random() % (st->columns / 3));
+ st->right = (st->columns -
+ (0xFF & (random() % (st->columns / 3))));
+
+ if (0 == random() % 3) /* sometimes be wide */
+ st->right = st->left + ((st->right - st->left) / 2);
+ }
+
+ if (st->right - st->left <= 10) /* introduce sanity */
+ {
+ st->left = 0;
+ st->right = st->columns;
+ }
+
+ if (st->right - st->left > 50) /* if wide, shrink and move */
+ {
+ st->left += (0xFF & (random() % ((st->columns - 50) + 1)));
+ st->right = st->left + (0xFF & ((random() % 40) + 10));
+ }
+
+ /* oh, gag. */
+ if (st->mode == 0 &&
+ st->right - st->left < 25 &&
+ st->columns > 40)
+ {
+ st->right += 20;
+ if (st->right > st->columns)
+ st->left -= (st->right - st->columns);
+ }
+ }
+ st->s = source;
+ }
+
+ if (st->delay)
+ {
+ if (0 == random() % 3)
+ this_delay += (0xFFFFFF & ((random() % (st->delay * 5)) + 1));
+
+ if (st->break_para)
+ this_delay += (0xFFFFFF & ((random() % (st->delay * 15)) + 1));
+ }
+
+ if (st->paras > 5 &&
+ (0 == (random() % 1000)) &&
+ st->y < st->rows-2)
+ return xjack_pine (st);
+
+ return this_delay;
+}
+
+static Bool
+xjack_event (Display *dpy, Window window, void *closure, XEvent *event)
+{
+ struct state *st = (struct state *) closure;
+ if (event->xany.type == ButtonPress)
+ {
+ st->scrolling++;
+ return True;
+ }
+
+ return False;
+}
+
+static void
+xjack_free (Display *dpy, Window window, void *closure)
+{
+ struct state *st = (struct state *) closure;
+ free (st);
+}
+
+
+static const char *xjack_defaults [] = {
+ ".background: #FFF0B4",
+ ".foreground: #000000",
+#ifdef HAVE_COCOA
+ ".font: American Typewriter 24",
+#else
+ ".font: -*-courier-medium-r-*-*-*-240-*-*-m-*-*-*",
+#endif
+ "*delay: 50000",
+ 0
+};
+
+static XrmOptionDescRec xjack_options [] = {
+ { "-delay", ".delay", XrmoptionSepArg, 0 },
+ { "-font", ".font", XrmoptionSepArg, 0 },
+ { 0, 0, 0, 0 }
+};
+
+XSCREENSAVER_MODULE ("XJack", xjack)
projects / xscreensaver / blobdiff