X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=hacks%2Fphosphor.c;h=724bbb5312807fa3c04e196fc367394a95969380;hp=105f9b5bcf7f0146d983c6e26b9d581bc933018f;hb=6b1c86cf395f59389e4ece4ea8f4bea2c332745b;hpb=df7adbee81405e2849728a24b498ad2117784b1f diff --git a/hacks/phosphor.c b/hacks/phosphor.c index 105f9b5b..724bbb53 100644 --- a/hacks/phosphor.c +++ b/hacks/phosphor.c @@ -1,4 +1,4 @@ -/* xscreensaver, Copyright (c) 1999 Jamie Zawinski +/* xscreensaver, Copyright (c) 1999-2008 Jamie Zawinski * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that @@ -9,15 +9,41 @@ * implied warranty. * * Phosphor -- simulate a glass tty with long-sustain phosphor. + * Written by Jamie Zawinski + * Pty and vt100 emulation by Fredrik Tolf */ -#include "screenhack.h" +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif /* HAVE_CONFIG_H */ + #include -#include -#include -#include +#include +#include + +#ifndef HAVE_COCOA +# define XK_MISCELLANY +# include +# include +# include +#endif + +#ifdef HAVE_UNISTD_H +# include +# include /* for O_RDWR */ +#endif -extern XtAppContext app; +#ifdef HAVE_FORKPTY +# include +# ifdef HAVE_PTY_H +# include +# endif +# ifdef HAVE_UTIL_H +# include +# endif +#endif /* HAVE_FORKPTY */ + +#include "screenhack.h" #define FUZZY_BORDER @@ -32,6 +58,14 @@ extern XtAppContext app; #define CURSOR_INDEX 128 +#define NPAR 16 + +#define BUILTIN_FONT + +#ifdef BUILTIN_FONT +# include "images/6x10font.xbm" +#endif /* BUILTIN_FONT */ + typedef struct { unsigned char name; int width, height; @@ -55,8 +89,14 @@ typedef struct { XFontStruct *font; int grid_width, grid_height; int char_width, char_height; + int saved_x, saved_y; int scale; int ticks; + int mode; + pid_t pid; + int escstate; + int csiparam[NPAR]; + int curparam; p_char **chars; p_cell *cells; XGCValues gcv; @@ -70,12 +110,23 @@ typedef struct { int cursor_x, cursor_y; XtIntervalId cursor_timer; + XtIntervalId pipe_timer; Time cursor_blink; FILE *pipe; XtInputId pipe_id; Bool input_available_p; Time subproc_relaunch_delay; + XComposeStatus compose; + Bool meta_sends_esc_p; + Bool swap_bs_del_p; + int delay; + + char last_c; + int bk; + + Bool meta_done_once; + unsigned int meta_mask; } p_state; @@ -116,36 +167,75 @@ static void launch_text_generator (p_state *state); that box (the "charcell" box) then we're going to lose it. Alas. */ -static p_state * -init_phosphor (Display *dpy, Window window) + +static void clear (p_state *); +static void set_cursor (p_state *, Bool on); + +static void * +phosphor_init (Display *dpy, Window window) { int i; unsigned long flags; p_state *state = (p_state *) calloc (sizeof(*state), 1); - char *fontname = get_string_resource ("font", "Font"); + char *fontname = get_string_resource (dpy, "font", "Font"); XFontStruct *font; state->dpy = dpy; state->window = window; XGetWindowAttributes (dpy, window, &state->xgwa); +/* XSelectInput (dpy, window, state->xgwa.your_event_mask | ExposureMask);*/ - state->font = XLoadQueryFont (dpy, fontname); + state->delay = get_integer_resource (dpy, "delay", "Integer"); + state->meta_sends_esc_p = get_boolean_resource (dpy, "metaSendsESC", "Boolean"); + state->swap_bs_del_p = get_boolean_resource (dpy, "swapBSDEL", "Boolean"); - if (!state->font) + if (!strcasecmp (fontname, "builtin") || + !strcasecmp (fontname, "(builtin)")) { - fprintf(stderr, "couldn't load font \"%s\"\n", fontname); +#ifndef BUILTIN_FONT + fprintf (stderr, "%s: no builtin font\n", progname); state->font = XLoadQueryFont (dpy, "fixed"); +#endif /* !BUILTIN_FONT */ } - if (!state->font) + else { - fprintf(stderr, "couldn't load font \"fixed\""); - exit(1); + state->font = XLoadQueryFont (dpy, fontname); + + if (!state->font) + { + fprintf(stderr, "couldn't load font \"%s\"\n", fontname); + state->font = XLoadQueryFont (dpy, "fixed"); + } + if (!state->font) + { + fprintf(stderr, "couldn't load font \"fixed\""); + exit(1); + } } font = state->font; - state->scale = get_integer_resource ("scale", "Integer"); - state->ticks = STATE_MAX + get_integer_resource ("ticks", "Integer"); + state->scale = get_integer_resource (dpy, "scale", "Integer"); + state->ticks = STATE_MAX + get_integer_resource (dpy, "ticks", "Integer"); + state->escstate = 0; + + { + char *s = get_string_resource (dpy, "mode", "Integer"); + state->mode = 0; + if (!s || !*s || !strcasecmp (s, "pipe")) + state->mode = 0; + else if (!strcasecmp (s, "pty")) + state->mode = 1; + else + fprintf (stderr, "%s: mode must be either `pipe' or `pty', not `%s'\n", + progname, s); + +#ifndef HAVE_FORKPTY + fprintf (stderr, "%s: no pty support on this system; using -pipe mode.\n", + progname); + state->mode = 0; +#endif /* HAVE_FORKPTY */ + } #if 0 for (i = 0; i < font->n_properties; i++) @@ -153,12 +243,22 @@ init_phosphor (Display *dpy, Window window) printf ("font: %s\n", XGetAtomName(dpy, font->properties[i].card32)); #endif /* 0 */ - state->cursor_blink = get_integer_resource ("cursor", "Time"); + state->cursor_blink = get_integer_resource (dpy, "cursor", "Time"); state->subproc_relaunch_delay = - (1000 * get_integer_resource ("relaunch", "Time")); + (1000 * get_integer_resource (dpy, "relaunch", "Time")); - state->char_width = font->max_bounds.width; - state->char_height = font->max_bounds.ascent + font->max_bounds.descent; +# ifdef BUILTIN_FONT + if (! font) + { + state->char_width = (font6x10_width / 256) - 1; + state->char_height = font6x10_height; + } + else +# endif /* BUILTIN_FONT */ + { + state->char_width = font->max_bounds.width; + state->char_height = font->max_bounds.ascent + font->max_bounds.descent; + } state->grid_width = state->xgwa.width / (state->char_width * state->scale); state->grid_height = state->xgwa.height /(state->char_height * state->scale); @@ -174,14 +274,14 @@ init_phosphor (Display *dpy, Window window) int h1, h2; double s1, s2, v1, v2; - unsigned long fg = get_pixel_resource ("foreground", "Foreground", - state->dpy, state->xgwa.colormap); - unsigned long bg = get_pixel_resource ("background", "Background", - state->dpy, state->xgwa.colormap); - unsigned long flare = get_pixel_resource ("flareForeground", "Foreground", - state->dpy,state->xgwa.colormap); - unsigned long fade = get_pixel_resource ("fadeForeground", "Foreground", - state->dpy,state->xgwa.colormap); + unsigned long fg = get_pixel_resource (state->dpy, state->xgwa.colormap, + "foreground", "Foreground"); + unsigned long bg = get_pixel_resource (state->dpy, state->xgwa.colormap, + "background", "Background"); + unsigned long flare = get_pixel_resource (state->dpy,state->xgwa.colormap, + "flareForeground", "Foreground"); + unsigned long fade = get_pixel_resource (state->dpy,state->xgwa.colormap, + "fadeForeground", "Foreground"); XColor start, end; @@ -205,7 +305,7 @@ init_phosphor (Display *dpy, Window window) /* Now, GCs all around. */ - state->gcv.font = font->fid; + state->gcv.font = (font ? font->fid : 0); state->gcv.cap_style = CapRound; #ifdef FUZZY_BORDER state->gcv.line_width = (int) (((long) state->scale) * 1.3); @@ -244,22 +344,88 @@ init_phosphor (Display *dpy, Window window) capture_font_bits (state); + set_cursor (state, True); + launch_text_generator (state); +/* clear (state);*/ return state; } +/* Re-query the window size and update the internal character grid if changed. + */ +static void +resize_grid (p_state *state) +{ + int ow = state->grid_width; + int oh = state->grid_height; + p_cell *ocells = state->cells; + int x, y; + + XGetWindowAttributes (state->dpy, state->window, &state->xgwa); + + state->grid_width = state->xgwa.width /(state->char_width * state->scale); + state->grid_height = state->xgwa.height /(state->char_height * state->scale); + + if (ow == state->grid_width && + oh == state->grid_height) + return; + + state->cells = (p_cell *) calloc (sizeof(p_cell), + state->grid_width * state->grid_height); + + for (y = 0; y < state->grid_height; y++) + { + for (x = 0; x < state->grid_width; x++) + { + p_cell *ncell = &state->cells [state->grid_width * y + x]; + if (x < ow && y < oh) + *ncell = ocells [ow * y + x]; + ncell->changed = True; + } + } + + if (state->cursor_x >= state->grid_width) + state->cursor_x = state->grid_width-1; + if (state->cursor_y >= state->grid_height) + state->cursor_y = state->grid_height-1; + + free (ocells); +} + + static void capture_font_bits (p_state *state) { XFontStruct *font = state->font; - int safe_width = font->max_bounds.rbearing - font->min_bounds.lbearing; - int height = state->char_height; + int safe_width, height; unsigned char string[257]; int i; - Pixmap p = XCreatePixmap (state->dpy, state->window, - (safe_width * 256), height, 1); + Pixmap p; + +# ifdef BUILTIN_FONT + Pixmap p2 = 0; + + if (!font) + { + safe_width = state->char_width + 1; + height = state->char_height; + p2 = XCreatePixmapFromBitmapData (state->dpy, state->window, + (char *) font6x10_bits, + font6x10_width, + font6x10_height, + 1, 0, 1); + } + else +# endif /* BUILTIN_FONT */ + { + safe_width = font->max_bounds.rbearing - font->min_bounds.lbearing; + height = state->char_height; + } + + p = XCreatePixmap (state->dpy, state->window, + (safe_width * 256), height, 1); for (i = 0; i < 256; i++) string[i] = (unsigned char) i; @@ -273,10 +439,16 @@ capture_font_bits (p_state *state) state->gcv.foreground = 1; state->gc1 = XCreateGC (state->dpy, p, - (GCFont | GCForeground | GCBackground | + ((font ? GCFont : 0) | + GCForeground | GCBackground | GCCapStyle | GCLineWidth), &state->gcv); +#ifdef HAVE_COCOA + jwxyz_XSetAntiAliasing (state->dpy, state->gc0, False); + jwxyz_XSetAntiAliasing (state->dpy, state->gc1, False); +#endif + #ifdef FUZZY_BORDER { state->gcv.line_width = (int) (((long) state->scale) * 0.8); @@ -285,7 +457,8 @@ capture_font_bits (p_state *state) if (state->gcv.line_width < 1) state->gcv.line_width = 1; state->gc2 = XCreateGC (state->dpy, p, - (GCFont | GCForeground | GCBackground | + ((font ? GCFont : 0) | + GCForeground | GCBackground | GCCapStyle | GCLineWidth), &state->gcv); } @@ -293,31 +466,40 @@ capture_font_bits (p_state *state) XFillRectangle (state->dpy, p, state->gc0, 0, 0, (safe_width * 256), height); - for (i = 0; i < 256; i++) +# ifdef BUILTIN_FONT + if (p2) { - if (string[i] < font->min_char_or_byte2 || - string[i] > font->max_char_or_byte2) - continue; - XDrawString (state->dpy, p, state->gc1, - i * safe_width, font->ascent, - string + i, 1); + XCopyPlane (state->dpy, p2, p, state->gc1, + 0, 0, font6x10_width, font6x10_height, + 0, 0, 1); + XFreePixmap (state->dpy, p2); + } + else +# endif /* BUILTIN_FONT */ + { + for (i = 0; i < 256; i++) + { + if (string[i] < font->min_char_or_byte2 || + string[i] > font->max_char_or_byte2) + continue; + XDrawString (state->dpy, p, state->gc1, + i * safe_width, font->ascent, + (char *) (string + i), 1); + } } /* Draw the cursor. */ XFillRectangle (state->dpy, p, state->gc1, (CURSOR_INDEX * safe_width), 1, - (font->per_char - ? font->per_char['n'-font->min_char_or_byte2].width - : font->max_bounds.width), - font->ascent - 1); + (font + ? (font->per_char + ? font->per_char['n'-font->min_char_or_byte2].width + : font->max_bounds.width) + : state->char_width), + (font + ? font->ascent - 1 + : state->char_height)); -#if 0 - XCopyPlane (state->dpy, p, state->window, state->gcs[FLARE], - 0, 0, (safe_width * 256), height, 0, 0, 1L); - XSync(state->dpy, False); -#endif - - XSync (state->dpy, False); state->font_bits = XGetImage (state->dpy, p, 0, 0, (safe_width * 256), height, ~0L, XYPixmap); XFreePixmap (state->dpy, p); @@ -353,13 +535,15 @@ char_to_pixmap (p_state *state, p_char *pc, int c) int x1, y; XFontStruct *font = state->font; - int safe_width = font->max_bounds.rbearing - font->min_bounds.lbearing; + int safe_width = (font + ? font->max_bounds.rbearing - font->min_bounds.lbearing + : state->char_width + 1); int width = state->scale * state->char_width; int height = state->scale * state->char_height; - if (c < font->min_char_or_byte2 || - c > font->max_char_or_byte2) + if (font && (c < font->min_char_or_byte2 || + c > font->max_char_or_byte2)) goto DONE; gc = state->gc1; @@ -450,7 +634,6 @@ static void set_cursor (p_state *state, Bool on) { if (set_cursor_1 (state, on)) -; { if (state->cursor_timer) XtRemoveTimeOut (state->cursor_timer); @@ -466,6 +649,7 @@ static void cursor_off_timer (XtPointer closure, XtIntervalId *id) { p_state *state = (p_state *) closure; + XtAppContext app = XtDisplayToApplicationContext (state->dpy); set_cursor_1 (state, False); state->cursor_timer = XtAppAddTimeOut (app, state->cursor_blink, cursor_on_timer, closure); @@ -475,6 +659,7 @@ static void cursor_on_timer (XtPointer closure, XtIntervalId *id) { p_state *state = (p_state *) closure; + XtAppContext app = XtDisplayToApplicationContext (state->dpy); set_cursor_1 (state, True); state->cursor_timer = XtAppAddTimeOut (app, 2 * state->cursor_blink, cursor_off_timer, closure); @@ -529,6 +714,7 @@ static void scroll (p_state *state) { int x, y; + for (x = 0; x < state->grid_width; x++) { p_cell *from = 0, *to = 0; @@ -553,7 +739,7 @@ scroll (p_state *state) } to = from; - if (to->state == FLARE || to->state == NORMAL) + if (to && (to->state == FLARE || to->state == NORMAL)) { to->state = FADE; to->changed = True; @@ -567,7 +753,8 @@ static void print_char (p_state *state, int c) { p_cell *cell = &state->cells[state->grid_width * state->cursor_y - + state->cursor_x]; + + state->cursor_x]; + int i, start, end; /* Start the cursor fading (in case we don't end up overwriting it.) */ if (cell->state == FLARE || cell->state == NORMAL) @@ -575,41 +762,388 @@ print_char (p_state *state, int c) cell->state = FADE; cell->changed = True; } - - if (c == '\t') c = ' '; /* blah. */ - - if (c == '\r' || c == '\n') + + if (state->pid) /* Only interpret VT100 sequences if running in pty-mode. + It would be nice if we could just interpret them all + the time, but that would require subprocesses to send + CRLF line endings instead of bare LF, so that's no good. + */ { - state->cursor_x = 0; - if (state->cursor_y == state->grid_height - 1) - scroll (state); - else - state->cursor_y++; - } - else if (c == '\014') - { - clear (state); + switch (state->escstate) + { + case 0: + switch (c) + { + case 7: /* BEL */ + /* Dummy case - we don't want the screensaver to beep */ + /* #### But maybe this should flash the screen? */ + break; + case 8: /* BS */ + if (state->cursor_x > 0) + state->cursor_x--; + break; + case 9: /* HT */ + if (state->cursor_x < state->grid_width - 8) + { + state->cursor_x = (state->cursor_x & ~7) + 8; + } + else + { + state->cursor_x = 0; + if (state->cursor_y < state->grid_height - 1) + state->cursor_y++; + else + scroll (state); + } + break; + case 10: /* LF */ + case 11: /* VT */ + case 12: /* FF */ + if(state->last_c == 13) + { + cell->state = NORMAL; + cell->p_char = state->chars[state->bk]; + cell->changed = True; + } + if (state->cursor_y < state->grid_height - 1) + state->cursor_y++; + else + scroll (state); + break; + case 13: /* CR */ + state->cursor_x = 0; + cell = &state->cells[state->grid_width * state->cursor_y]; + if((cell->p_char == NULL) || (cell->p_char->name == CURSOR_INDEX)) + state->bk = ' '; + else + state->bk = cell->p_char->name; + break; + case 14: /* SO */ + case 15: /* SI */ + /* Dummy case - I don't want to load several fonts for + the maybe two programs world-wide that use that */ + break; + case 24: /* CAN */ + case 26: /* SUB */ + /* Dummy case - these interrupt escape sequences, so + they don't do anything in this state */ + break; + case 27: /* ESC */ + state->escstate = 1; + break; + case 127: /* DEL */ + /* Dummy case - this is supposed to be ignored */ + break; + case 155: /* CSI */ + state->escstate = 2; + for(i = 0; i < NPAR; i++) + state->csiparam[i] = 0; + state->curparam = 0; + break; + default: + cell->state = FLARE; + cell->p_char = state->chars[c]; + cell->changed = True; + state->cursor_x++; + + if (c != ' ' && cell->p_char->blank_p) + cell->p_char = state->chars[CURSOR_INDEX]; + + if (state->cursor_x >= state->grid_width - 1) + { + state->cursor_x = 0; + if (state->cursor_y >= state->grid_height - 1) + scroll (state); + else + state->cursor_y++; + } + break; + } + break; + case 1: + switch (c) + { + case 24: /* CAN */ + case 26: /* SUB */ + state->escstate = 0; + break; + case 'c': /* Reset */ + clear (state); + state->escstate = 0; + break; + case 'D': /* Linefeed */ + if (state->cursor_y < state->grid_height - 1) + state->cursor_y++; + else + scroll (state); + state->escstate = 0; + break; + case 'E': /* Newline */ + state->cursor_x = 0; + state->escstate = 0; + break; + case 'M': /* Reverse newline */ + if (state->cursor_y > 0) + state->cursor_y--; + state->escstate = 0; + break; + case '7': /* Save state */ + state->saved_x = state->cursor_x; + state->saved_y = state->cursor_y; + state->escstate = 0; + break; + case '8': /* Restore state */ + state->cursor_x = state->saved_x; + state->cursor_y = state->saved_y; + state->escstate = 0; + break; + case '[': /* CSI */ + state->escstate = 2; + for(i = 0; i < NPAR; i++) + state->csiparam[i] = 0; + state->curparam = 0; + break; + case '%': /* Select charset */ + /* No, I don't support UTF-8, since the phosphor font + isn't even Unicode anyway. We must still catch the + last byte, though. */ + case '(': + case ')': + /* I don't support different fonts either - see above + for SO and SI */ + state->escstate = 3; + break; + default: + /* Escape sequences not supported: + * + * H - Set tab stop + * Z - Terminal identification + * > - Keypad change + * = - Other keypad change + * ] - OS command + */ + state->escstate = 0; + break; + } + break; + case 2: + switch (c) + { + case 24: /* CAN */ + case 26: /* SUB */ + state->escstate = 0; + break; + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + if (state->curparam < NPAR) + state->csiparam[state->curparam] = (state->csiparam[state->curparam] * 10) + (c - '0'); + break; + case ';': + state->csiparam[++state->curparam] = 0; + break; + case '[': + state->escstate = 3; + break; + case '@': + for (i = 0; i < state->csiparam[0]; i++) + { + if(++state->cursor_x > state->grid_width) + { + state->cursor_x = 0; + if (state->cursor_y < state->grid_height - 1) + state->cursor_y++; + else + scroll (state); + } + cell = &state->cells[state->grid_width * state->cursor_y + state->cursor_x]; + if (cell->state == FLARE || cell->state == NORMAL) + { + cell->state = FADE; + cell->changed = True; + } + } + state->escstate = 0; + break; + case 'F': + state->cursor_x = 0; + case 'A': + if (state->csiparam[0] == 0) + state->csiparam[0] = 1; + if ((state->cursor_y -= state->csiparam[0]) < 0) + state->cursor_y = 0; + state->escstate = 0; + break; + case 'E': + state->cursor_x = 0; + case 'e': + case 'B': + if (state->csiparam[0] == 0) + state->csiparam[0] = 1; + if ((state->cursor_y += state->csiparam[0]) >= state->grid_height - 1) + state->cursor_y = state->grid_height - 1; + state->escstate = 0; + break; + case 'a': + case 'C': + if (state->csiparam[0] == 0) + state->csiparam[0] = 1; + if ((state->cursor_x += state->csiparam[0]) >= state->grid_width - 1) + state->cursor_x = state->grid_width - 1; + state->escstate = 0; + break; + case 'D': + if (state->csiparam[0] == 0) + state->csiparam[0] = 1; + if ((state->cursor_x -= state->csiparam[0]) < 0) + state->cursor_x = 0; + state->escstate = 0; + break; + case 'd': + if ((state->cursor_y = (state->csiparam[0] - 1)) >= state->grid_height - 1) + state->cursor_y = state->grid_height - 1; + state->escstate = 0; + break; + case '`': + case 'G': + if ((state->cursor_x = (state->csiparam[0] - 1)) >= state->grid_width - 1) + state->cursor_x = state->grid_width - 1; + state->escstate = 0; + break; + case 'f': + case 'H': + if ((state->cursor_y = (state->csiparam[0] - 1)) >= state->grid_height - 1) + state->cursor_y = state->grid_height - 1; + if ((state->cursor_x = (state->csiparam[1] - 1)) >= state->grid_width - 1) + state->cursor_x = state->grid_width - 1; + if(state->cursor_y < 0) + state->cursor_y = 0; + if(state->cursor_x < 0) + state->cursor_x = 0; + state->escstate = 0; + break; + case 'J': + start = 0; + end = state->grid_height * state->grid_width; + if (state->csiparam[0] == 0) + start = state->grid_width * state->cursor_y + state->cursor_x; + if (state->csiparam[0] == 1) + end = state->grid_width * state->cursor_y + state->cursor_x; + for (i = start; i < end; i++) + { + cell = &state->cells[i]; + if (cell->state == FLARE || cell->state == NORMAL) + { + cell->state = FADE; + cell->changed = True; + } + } + set_cursor (state, True); + state->escstate = 0; + break; + case 'K': + start = 0; + end = state->grid_width; + if (state->csiparam[0] == 0) + start = state->cursor_x; + if (state->csiparam[1] == 1) + end = state->cursor_x; + for (i = start; i < end; i++) + { + if (cell->state == FLARE || cell->state == NORMAL) + { + cell->state = FADE; + cell->changed = True; + } + cell++; + } + state->escstate = 0; + break; + case 's': /* Save position */ + state->saved_x = state->cursor_x; + state->saved_y = state->cursor_y; + state->escstate = 0; + break; + case 'u': /* Restore position */ + state->cursor_x = state->saved_x; + state->cursor_y = state->saved_y; + state->escstate = 0; + break; + case '?': /* DEC Private modes */ + if ((state->curparam != 0) || (state->csiparam[0] != 0)) + state->escstate = 0; + break; + default: + /* Known unsupported CSIs: + * + * L - Insert blank lines + * M - Delete lines (I don't know what this means...) + * P - Delete characters + * X - Erase characters (difference with P being...?) + * c - Terminal identification + * g - Clear tab stop(s) + * h - Set mode (Mainly due to its complexity and lack of good + docs) + * l - Clear mode + * m - Set mode (Phosphor is, per defenition, green on black) + * n - Status report + * q - Set keyboard LEDs + * r - Set scrolling region (too exhausting - noone uses this, + right?) + */ + state->escstate = 0; + break; + } + break; + case 3: + state->escstate = 0; + break; + } + set_cursor (state, True); } else { - cell->state = FLARE; - cell->p_char = state->chars[c]; - cell->changed = True; - state->cursor_x++; - - if (c != ' ' && cell->p_char->blank_p) - cell->p_char = state->chars[CURSOR_INDEX]; - - if (state->cursor_x >= state->grid_width - 1) - { - state->cursor_x = 0; - if (state->cursor_y >= state->grid_height - 1) - scroll (state); - else - state->cursor_y++; - } + if (c == '\t') c = ' '; /* blah. */ + + if (c == '\r' || c == '\n') /* handle CR, LF, or CRLF as "new line". */ + { + if (c == '\n' && state->last_c == '\r') + ; /* CRLF -- do nothing */ + else + { + state->cursor_x = 0; + if (state->cursor_y == state->grid_height - 1) + scroll (state); + else + state->cursor_y++; + } + } + else if (c == '\014') + { + clear (state); + } + else + { + cell->state = FLARE; + cell->p_char = state->chars[c]; + cell->changed = True; + state->cursor_x++; + + if (c != ' ' && cell->p_char->blank_p) + cell->p_char = state->chars[CURSOR_INDEX]; + + if (state->cursor_x >= state->grid_width - 1) + { + state->cursor_x = 0; + if (state->cursor_y >= state->grid_height - 1) + scroll (state); + else + state->cursor_y++; + } + } + set_cursor (state, True); } - set_cursor (state, True); + + state->last_c = c; } @@ -671,12 +1205,14 @@ update_display (p_state *state, Bool changed_only) } -static void -run_phosphor (p_state *state) +static unsigned long +phosphor_draw (Display *dpy, Window window, void *closure) { + p_state *state = (p_state *) closure; update_display (state, True); decay (state); drain_input (state); + return state->delay; } @@ -694,24 +1230,97 @@ subproc_cb (XtPointer closure, int *source, XtInputId *id) static void launch_text_generator (p_state *state) { - char *oprogram = get_string_resource ("program", "Program"); - char *program = (char *) malloc (strlen (oprogram) + 10); + XtAppContext app = XtDisplayToApplicationContext (state->dpy); + Display *dpy = state->dpy; + char buf[255]; + char *oprogram = get_string_resource (dpy, "program", "Program"); + char *program = (char *) malloc (strlen (oprogram) + 50); strcpy (program, "( "); strcat (program, oprogram); + + /* Kludge! Special-case "xscreensaver-text" to tell it how wide + the screen is. We used to do this by just always feeding + `program' through sprintf() and setting the default value to + "xscreensaver-text --cols %d", but that makes things blow up + if someone ever uses a --program that includes a % anywhere. + */ + if (!strcmp (oprogram, "xscreensaver-text")) + sprintf (program + strlen(program), " --cols %d", state->grid_width-1); + strcat (program, " ) 2>&1"); - if ((state->pipe = popen (program, "r"))) +#ifdef HAVE_FORKPTY + if(state->mode == 1) { - state->pipe_id = - XtAppAddInput (app, fileno (state->pipe), - (XtPointer) (XtInputReadMask | XtInputExceptMask), - subproc_cb, (XtPointer) state); + int fd; + struct winsize ws; + + ws.ws_row = state->grid_height - 1; + ws.ws_col = state->grid_width - 2; + ws.ws_xpixel = state->xgwa.width; + ws.ws_ypixel = state->xgwa.height; + + state->pipe = NULL; + if((state->pid = forkpty(&fd, NULL, NULL, &ws)) < 0) + { + /* Unable to fork */ + sprintf (buf, "%.100s: forkpty", progname); + perror(buf); + } + else if(!state->pid) + { + /* This is the child fork. */ + char *av[10]; + int i = 0; + if (putenv("TERM=vt100")) + abort(); + av[i++] = "/bin/sh"; + av[i++] = "-c"; + av[i++] = program; + av[i] = 0; + execvp (av[0], av); + sprintf (buf, "%.100s: %.100s", progname, oprogram); + perror(buf); + exit(1); + } + else + { + /* This is the parent fork. */ + state->pipe = fdopen(fd, "r+"); + state->pipe_id = + XtAppAddInput (app, fileno (state->pipe), + (XtPointer) (XtInputReadMask | XtInputExceptMask), + subproc_cb, (XtPointer) state); + } } else +#endif /* HAVE_FORKPTY */ { - perror (program); + /* don't mess up controlling terminal if someone dumbly does + "-pipe -program tcsh". */ + static int protected_stdin_p = 0; + if (! protected_stdin_p) { + fclose (stdin); + open ("/dev/null", O_RDWR); /* re-allocate fd 0 */ + protected_stdin_p = 1; + } + + if ((state->pipe = popen (program, "r"))) + { + state->pipe_id = + XtAppAddInput (app, fileno (state->pipe), + (XtPointer) (XtInputReadMask | XtInputExceptMask), + subproc_cb, (XtPointer) state); + } + else + { + sprintf (buf, "%.100s: %.100s", progname, program); + perror (buf); + } } + + free (program); } @@ -719,6 +1328,8 @@ static void relaunch_generator_timer (XtPointer closure, XtIntervalId *id) { p_state *state = (p_state *) closure; + if (!state->pipe_timer) abort(); + state->pipe_timer = 0; launch_text_generator (state); } @@ -726,7 +1337,8 @@ relaunch_generator_timer (XtPointer closure, XtIntervalId *id) static void drain_input (p_state *state) { - if (state->input_available_p) + XtAppContext app = XtDisplayToApplicationContext (state->dpy); + if (state->input_available_p && state->pipe) { unsigned char s[2]; int n = read (fileno (state->pipe), (void *) s, 1); @@ -738,17 +1350,29 @@ drain_input (p_state *state) { XtRemoveInput (state->pipe_id); state->pipe_id = 0; - pclose (state->pipe); + if (state->pid) + { + waitpid(state->pid, NULL, 0); + fclose (state->pipe); + } + else + { + pclose (state->pipe); + } state->pipe = 0; - if (state->cursor_x != 0) /* break line if unbroken */ - print_char (state, '\n'); /* blank line */ + if (state->cursor_x != 0) { /* break line if unbroken */ + print_char (state, '\r'); + print_char (state, '\n'); + } + print_char (state, '\r'); /* blank line */ print_char (state, '\n'); /* Set up a timer to re-launch the subproc in a bit. */ - XtAppAddTimeOut (app, state->subproc_relaunch_delay, - relaunch_generator_timer, - (XtPointer) state); + state->pipe_timer = + XtAppAddTimeOut (app, state->subproc_relaunch_delay, + relaunch_generator_timer, + (XtPointer) state); } state->input_available_p = False; @@ -756,51 +1380,177 @@ drain_input (p_state *state) } - -char *progclass = "Phosphor"; +/* The interpretation of the ModN modifiers is dependent on what keys + are bound to them: Mod1 does not necessarily mean "meta". It only + means "meta" if Meta_L or Meta_R are bound to it. If Meta_L is on + Mod5, then Mod5 is the one that means Meta. Oh, and Meta and Alt + aren't necessarily the same thing. Icepicks in my forehead! + */ +static unsigned int +do_icccm_meta_key_stupidity (Display *dpy) +{ + unsigned int modbits = 0; +# ifndef HAVE_COCOA + int i, j, k; + XModifierKeymap *modmap = XGetModifierMapping (dpy); + for (i = 3; i < 8; i++) + for (j = 0; j < modmap->max_keypermod; j++) + { + int code = modmap->modifiermap[i * modmap->max_keypermod + j]; + KeySym *syms; + int nsyms = 0; + if (code == 0) continue; + syms = XGetKeyboardMapping (dpy, code, 1, &nsyms); + for (k = 0; k < nsyms; k++) + if (syms[k] == XK_Meta_L || syms[k] == XK_Meta_R || + syms[k] == XK_Alt_L || syms[k] == XK_Alt_R) + modbits |= (1 << i); + XFree (syms); + } + XFreeModifiermap (modmap); +# endif /* HAVE_COCOA */ + return modbits; +} + +/* Returns a mask of the bit or bits of a KeyPress event that mean "meta". + */ +static unsigned int +meta_modifier (p_state *state) +{ + if (!state->meta_done_once) + { + /* Really, we are supposed to recompute this if a KeymapNotify + event comes in, but fuck it. */ + state->meta_done_once = True; + state->meta_mask = do_icccm_meta_key_stupidity (state->dpy); + } + return state->meta_mask; +} + + +static void +phosphor_reshape (Display *dpy, Window window, void *closure, + unsigned int w, unsigned int h) +{ + p_state *state = (p_state *) closure; + resize_grid (state); -char *defaults [] = { +# if defined(HAVE_FORKPTY) && defined(TIOCSWINSZ) + if (state->pid) + { + /* Tell the sub-process that the screen size has changed. */ + struct winsize ws; + ws.ws_row = state->grid_height - 1; + ws.ws_col = state->grid_width - 2; + ws.ws_xpixel = state->xgwa.width; + ws.ws_ypixel = state->xgwa.height; + ioctl (fileno (state->pipe), TIOCSWINSZ, &ws); + kill (state->pid, SIGWINCH); + } +# endif /* HAVE_FORKPTY && TIOCSWINSZ */ +} + +static Bool +phosphor_event (Display *dpy, Window window, void *closure, XEvent *event) +{ + p_state *state = (p_state *) closure; + + if (event->xany.type == Expose) + update_display (state, False); + else if (event->xany.type == KeyPress) + { + KeySym keysym; + unsigned char c = 0; + XLookupString (&event->xkey, (char *) &c, 1, &keysym, + &state->compose); + if (c != 0 && state->pipe) + { + if (!state->swap_bs_del_p) ; + else if (c == 127) c = 8; + else if (c == 8) c = 127; + + /* If meta was held down, send ESC, or turn on the high bit. */ + if (event->xkey.state & meta_modifier (state)) + { + if (state->meta_sends_esc_p) + fputc ('\033', state->pipe); + else + c |= 0x80; + } + + fputc (c, state->pipe); + fflush (state->pipe); + event->xany.type = 0; /* don't interpret this event defaultly. */ + } + return True; + } + + return False; +} + +static void +phosphor_free (Display *dpy, Window window, void *closure) +{ + p_state *state = (p_state *) closure; + + if (state->pipe_id) + XtRemoveInput (state->pipe_id); + if (state->pipe) + pclose (state->pipe); + if (state->cursor_timer) + XtRemoveTimeOut (state->cursor_timer); + if (state->pipe_timer) + XtRemoveTimeOut (state->pipe_timer); + + /* #### there's more to free here */ + + free (state); +} + + + +static const char *phosphor_defaults [] = { ".background: Black", - ".foreground: Green", - "*fadeForeground: DarkGreen", - "*flareForeground: White", + ".foreground: #00FF00", + "*fadeForeground: #006400", + "*flareForeground: #FFFFFF", +#if defined(BUILTIN_FONT) + "*font: (builtin)", +#elif defined(HAVE_COCOA) + "*font: Monaco 15", +#else "*font: fixed", +#endif "*scale: 6", "*ticks: 20", "*delay: 50000", "*cursor: 333", - "*program: " ZIPPY_PROGRAM, + "*program: xscreensaver-text", "*relaunch: 5", + "*metaSendsESC: True", + "*swapBSDEL: True", +#ifdef HAVE_FORKPTY + "*mode: pty", +#else /* !HAVE_FORKPTY */ + "*mode: pipe", +#endif /* !HAVE_FORKPTY */ 0 }; -XrmOptionDescRec options [] = { +static XrmOptionDescRec phosphor_options [] = { { "-font", ".font", XrmoptionSepArg, 0 }, { "-scale", ".scale", XrmoptionSepArg, 0 }, { "-ticks", ".ticks", XrmoptionSepArg, 0 }, { "-delay", ".delay", XrmoptionSepArg, 0 }, { "-program", ".program", XrmoptionSepArg, 0 }, + { "-pty", ".mode", XrmoptionNoArg, "pty" }, + { "-pipe", ".mode", XrmoptionNoArg, "pipe" }, + { "-meta", ".metaSendsESC", XrmoptionNoArg, "False" }, + { "-esc", ".metaSendsESC", XrmoptionNoArg, "True" }, + { "-bs", ".swapBSDEL", XrmoptionNoArg, "False" }, + { "-del", ".swapBSDEL", XrmoptionNoArg, "True" }, { 0, 0, 0, 0 } }; -void -screenhack (Display *dpy, Window window) -{ - int delay = get_integer_resource ("delay", "Integer"); - p_state *state = init_phosphor (dpy, window); - - clear (state); - - while (1) - { - run_phosphor (state); - XSync (dpy, False); - screenhack_handle_events (dpy); - - if (XtAppPending (app) & (XtIMTimer|XtIMAlternateInput)) - XtAppProcessEvent (app, XtIMTimer|XtIMAlternateInput); - - if (delay) usleep (delay); - } -} +XSCREENSAVER_MODULE ("Phosphor", phosphor)