git.distorted.org.uk Git - u/mdw/putty/blob - macosx/osxwin.m

   1 /*
   2  * osxwin.m: code to manage a session window in Mac OS X PuTTY.
   3  */
   4
   5 #import <Cocoa/Cocoa.h>
   6 #include "putty.h"
   7 #include "terminal.h"
   8 #include "osxclass.h"
   9
  10 /* Colours come in two flavours: configurable, and xterm-extended. */
  11 #define NCFGCOLOURS (lenof(((Config *)0)->colours))
  12 #define NEXTCOLOURS 240 /* 216 colour-cube plus 24 shades of grey */
  13 #define NALLCOLOURS (NCFGCOLOURS + NEXTCOLOURS)
  14
  15 /*
  16  * The key component of the per-session data is the SessionWindow
  17  * class. A pointer to this is used as the frontend handle, to be
  18  * passed to all the platform-independent subsystems that require
  19  * one.
  20  */
  21
  22 @interface TerminalView : NSImageView
  23 {
  24     NSFont *font;
  25     NSImage *image;
  26     Terminal *term;
  27     Config cfg;
  28     NSColor *colours[NALLCOLOURS];
  29     float fw, fasc, fdesc, fh;
  30 }
  31 - (void)drawStartFinish:(BOOL)start;
  32 - (void)setColour:(int)n r:(float)r g:(float)g b:(float)b;
  33 - (void)doText:(wchar_t *)text len:(int)len x:(int)x y:(int)y
  34     attr:(unsigned long)attr lattr:(int)lattr;
  35 @end
  36
  37 @implementation TerminalView
  38 - (BOOL)isFlipped
  39 {
  40     return YES;
  41 }
  42 - (id)initWithTerminal:(Terminal *)aTerm config:(Config)aCfg
  43 {
  44     float w, h;
  45
  46     self = [self initWithFrame:NSMakeRect(0,0,100,100)];
  47
  48     term = aTerm;
  49     cfg = aCfg;
  50
  51     /*
  52      * Initialise the fonts we're going to use.
  53      *
  54      * FIXME: for the moment I'm sticking with exactly one default font.
  55      */
  56     font = [NSFont userFixedPitchFontOfSize:0];
  57
  58     /*
  59      * Now determine the size of the primary font.
  60      *
  61      * FIXME: If we have multiple fonts, we may need to set fasc
  62      * and fdesc to the _maximum_ asc and desc out of all the
  63      * fonts, _before_ adding them together to get fh.
  64      */
  65     fw = [font widthOfString:@"A"];
  66     fasc = [font ascender];
  67     fdesc = -[font descender];
  68     fh = fasc + fdesc;
  69     fh = (int)fh + (fh > (int)fh);     /* round up, ickily */
  70
  71     /*
  72      * Use this to figure out the size of the terminal view.
  73      */
  74     w = fw * term->cols;
  75     h = fh * term->rows;
  76
  77     /*
  78      * And set our size and subimage.
  79      */
  80     image = [[NSImage alloc] initWithSize:NSMakeSize(w,h)];
  81     [image setFlipped:YES];
  82     [self setImage:image];
  83     [self setFrame:NSMakeRect(0,0,w,h)];
  84
  85     term_invalidate(term);
  86
  87     return self;
  88 }
  89 - (void)drawStartFinish:(BOOL)start
  90 {
  91     if (start)
  92         [image lockFocus];
  93     else
  94         [image unlockFocus];
  95 }
  96 - (void)doText:(wchar_t *)text len:(int)len x:(int)x y:(int)y
  97     attr:(unsigned long)attr lattr:(int)lattr
  98 {
  99     int nfg, nbg, rlen, widefactor;
 100     float ox, oy, tw, th;
 101     NSDictionary *attrdict;
 102
 103     /* FIXME: TATTR_COMBINING */
 104
 105     nfg = ((attr & ATTR_FGMASK) >> ATTR_FGSHIFT);
 106     nbg = ((attr & ATTR_BGMASK) >> ATTR_BGSHIFT);
 107     if (attr & ATTR_REVERSE) {
 108         int t = nfg;
 109         nfg = nbg;
 110         nbg = t;
 111     }
 112     if (cfg.bold_colour && (attr & ATTR_BOLD)) {
 113         if (nfg < 16) nfg |= 8;
 114         else if (nfg >= 256) nfg |= 1;
 115     }
 116     if (cfg.bold_colour && (attr & ATTR_BLINK)) {
 117         if (nbg < 16) nbg |= 8;
 118         else if (nbg >= 256) nbg |= 1;
 119     }
 120     if (attr & TATTR_ACTCURS) {
 121         nfg = 260;
 122         nbg = 261;
 123     }
 124
 125     if (attr & ATTR_WIDE) {
 126         widefactor = 2;
 127         /* FIXME: what do we actually have to do about wide characters? */
 128     } else {
 129         widefactor = 1;
 130     }
 131
 132     /* FIXME: ATTR_BOLD without cfg.bold_colour */
 133
 134     if ((lattr & LATTR_MODE) != LATTR_NORM) {
 135         x *= 2;
 136         if (x >= term->cols)
 137             return;
 138         if (x + len*2*widefactor > term->cols)
 139             len = (term->cols-x)/2/widefactor;/* trim to LH half */
 140         rlen = len * 2;
 141     } else
 142         rlen = len;
 143
 144     /* FIXME: how do we actually implement double-{width,height} lattrs? */
 145
 146     ox = x * fw;
 147     oy = y * fh;
 148     tw = rlen * widefactor * fw;
 149     th = fh;
 150
 151     /*
 152      * Set the clipping rectangle.
 153      */
 154     [[NSGraphicsContext currentContext] saveGraphicsState];
 155     [NSBezierPath clipRect:NSMakeRect(ox, oy, tw, th)];
 156
 157     attrdict = [NSDictionary dictionaryWithObjectsAndKeys:
 158                 colours[nfg], NSForegroundColorAttributeName,
 159                 colours[nbg], NSBackgroundColorAttributeName,
 160                 font, NSFontAttributeName, nil];
 161
 162     /*
 163      * Create an NSString and draw it.
 164      *
 165      * Annoyingly, although our input is wchar_t which is four
 166      * bytes wide on OS X and terminal.c supports 32-bit Unicode,
 167      * we must convert into the two-byte type `unichar' to store in
 168      * NSString, so we lose display capability for extra-BMP stuff
 169      * at this point.
 170      */
 171     {
 172         NSString *string;
 173         unichar *utext;
 174         int i;
 175
 176         utext = snewn(len, unichar);
 177         for (i = 0; i < len; i++)
 178             utext[i] = (text[i] >= 0x10000 ? 0xFFFD : text[i]);
 179
 180         string = [NSString stringWithCharacters:utext length:len];
 181         [string drawAtPoint:NSMakePoint(ox, oy) withAttributes:attrdict];
 182
 183         sfree(utext);
 184     }
 185
 186     /*
 187      * Restore the graphics state from before the clipRect: call.
 188      */
 189     [[NSGraphicsContext currentContext] restoreGraphicsState];
 190
 191     /*
 192      * And flag this area as needing display.
 193      */
 194     [self setNeedsDisplayInRect:NSMakeRect(ox, oy, tw, th)];
 195 }
 196
 197 - (void)setColour:(int)n r:(float)r g:(float)g b:(float)b
 198 {
 199     assert(n >= 0 && n < lenof(colours));
 200     colours[n] = [[NSColor colorWithDeviceRed:r green:g blue:b alpha:1.0]
 201                   retain];
 202 }
 203 @end
 204
 205 @implementation SessionWindow
 206 - (id)initWithConfig:(Config)aCfg
 207 {
 208     NSRect rect = { {0,0}, {0,0} };
 209
 210     cfg = aCfg;                        /* structure copy */
 211
 212     init_ucs(&ucsdata, cfg.line_codepage, cfg.utf8_override,
 213              CS_UTF8, cfg.vtmode);
 214     term = term_init(&cfg, &ucsdata, self);
 215     logctx = log_init(self, &cfg);
 216     term_provide_logctx(term, logctx);
 217     term_size(term, cfg.height, cfg.width, cfg.savelines);
 218
 219     termview = [[[TerminalView alloc] initWithTerminal:term config:cfg]
 220                 autorelease];
 221
 222     /*
 223      * Now work out the size of the window.
 224      */
 225     rect = [termview frame];
 226     rect.origin = NSMakePoint(0,0);
 227     rect.size.width += 2 * cfg.window_border;
 228     rect.size.height += 2 * cfg.window_border;
 229
 230     /*
 231      * Set up a backend.
 232      */
 233     {
 234         int i;
 235         back = &pty_backend;
 236         for (i = 0; backends[i].backend != NULL; i++)
 237             if (backends[i].protocol == cfg.protocol) {
 238                 back = backends[i].backend;
 239                 break;
 240             }
 241     }
 242
 243     {
 244         const char *error;
 245         char *realhost = NULL;
 246         error = back->init(self, &backhandle, &cfg, cfg.host, cfg.port,
 247                            &realhost, cfg.tcp_nodelay, cfg.tcp_keepalives);
 248         if (error) {
 249             fatalbox("%s\n", error);   /* FIXME: connection_fatal at worst */
 250         }
 251
 252         if (realhost)
 253             sfree(realhost);           /* FIXME: do something with this */
 254     }
 255
 256     /*
 257      * Create a line discipline. (This must be done after creating
 258      * the terminal _and_ the backend, since it needs to be passed
 259      * pointers to both.)
 260      */
 261     ldisc = ldisc_create(&cfg, term, back, backhandle, self);
 262
 263     /*
 264      * FIXME: Set up a scrollbar.
 265      */
 266
 267     self = [super initWithContentRect:rect
 268             styleMask:(NSTitledWindowMask | NSMiniaturizableWindowMask |
 269                        NSClosableWindowMask)
 270             backing:NSBackingStoreBuffered
 271             defer:YES];
 272     [self setTitle:@"PuTTY"];
 273
 274     [self setIgnoresMouseEvents:NO];
 275
 276     /*
 277      * Put the terminal view in the window.
 278      */
 279     rect = [termview frame];
 280     rect.origin = NSMakePoint(cfg.window_border, cfg.window_border);
 281     [termview setFrame:rect];
 282     [[self contentView] addSubview:termview];
 283
 284     /*
 285      * Set up the colour palette.
 286      */
 287     palette_reset(self);
 288
 289     /*
 290      * FIXME: Only the _first_ document window should be centred.
 291      * The subsequent ones should appear down and to the right of
 292      * it, probably using the cascade function provided by Cocoa.
 293      * Also we're apparently required by the HIG to remember and
 294      * reuse previous positions of windows, although I'm not sure
 295      * how that works if the user opens more than one of the same
 296      * session type.
 297      */
 298     [self center];                     /* :-) */
 299
 300     return self;
 301 }
 302
 303 - (void)dealloc
 304 {
 305     /*
 306      * FIXME: Here we must deallocate all sorts of stuff: the
 307      * terminal, the backend, the ldisc, the logctx, you name it.
 308      * Do so.
 309      */
 310     [super dealloc];
 311 }
 312
 313 - (void)drawStartFinish:(BOOL)start
 314 {
 315     [termview drawStartFinish:start];
 316 }
 317
 318 - (void)setColour:(int)n r:(float)r g:(float)g b:(float)b
 319 {
 320     [termview setColour:n r:r g:g b:b];
 321 }
 322
 323 - (void)doText:(wchar_t *)text len:(int)len x:(int)x y:(int)y
 324     attr:(unsigned long)attr lattr:(int)lattr
 325 {
 326     /* Pass this straight on to the TerminalView. */
 327     [termview doText:text len:len x:x y:y attr:attr lattr:lattr];
 328 }
 329
 330 - (Config *)cfg
 331 {
 332     return &cfg;
 333 }
 334
 335 - (void)keyDown:(NSEvent *)ev
 336 {
 337     NSString *s = [ev characters];
 338     int i;
 339     int n = [s length], c = [s characterAtIndex:0], m = [ev modifierFlags];
 340     int cm = [[ev charactersIgnoringModifiers] characterAtIndex:0];
 341     wchar_t output[32];
 342     char coutput[32];
 343     int use_coutput = FALSE, special = FALSE, start, end;
 344
 345 printf("n=%d c=U+%04x cm=U+%04x m=%08x\n", n, c, cm, m);
 346
 347     /*
 348      * FIXME: Alt+numberpad codes.
 349      */
 350
 351     /*
 352      * Shift and Ctrl with PageUp/PageDown for scrollback.
 353      */
 354     if (n == 1 && c == NSPageUpFunctionKey && (m & NSShiftKeyMask)) {
 355         term_scroll(term, 0, -term->rows/2);
 356         return;
 357     }
 358     if (n == 1 && c == NSPageUpFunctionKey && (m & NSControlKeyMask)) {
 359         term_scroll(term, 0, -1);
 360         return;
 361     }
 362     if (n == 1 && c == NSPageDownFunctionKey && (m & NSShiftKeyMask)) {
 363         term_scroll(term, 0, +term->rows/2);
 364         return;
 365     }
 366     if (n == 1 && c == NSPageDownFunctionKey && (m & NSControlKeyMask)) {
 367         term_scroll(term, 0, +1);
 368         return;
 369     }
 370
 371     /*
 372      * FIXME: Shift-Ins for paste? Or is that not Maccy enough?
 373      */
 374
 375     /*
 376      * FIXME: Alt (Option? Command?) prefix in general.
 377      *
 378      * (Note that Alt-Shift-thing will work just by looking at
 379      * charactersIgnoringModifiers; but Alt-Ctrl-thing will need
 380      * processing properly, and Alt-as-in-Option won't happen at
 381      * all. Hmmm.)
 382      *
 383      * (Note also that we need to be able to override menu key
 384      * equivalents before this is particularly useful.)
 385      */
 386     start = 1;
 387     end = start;
 388
 389     /*
 390      * Ctrl-` is the same as Ctrl-\, unless we already have a
 391      * better idea.
 392      */
 393     if ((m & NSControlKeyMask) && n == 1 && cm == '`' && c == '`') {
 394         output[1] = '\x1c';
 395         end = 2;
 396     }
 397
 398     /* We handle Return ourselves, because it needs to be flagged as
 399      * special to ldisc. */
 400     if (n == 1 && c == '\015') {
 401         coutput[1] = '\015';
 402         use_coutput = TRUE;
 403         end = 2;
 404         special = TRUE;
 405     }
 406
 407     /* Control-Shift-Space is 160 (ISO8859 nonbreaking space) */
 408     if (n == 1 && (m & NSControlKeyMask) && (m & NSShiftKeyMask) &&
 409         cm == ' ') {
 410         output[1] = '\240';
 411         end = 2;
 412     }
 413
 414     /* Control-2, Control-Space and Control-@ are all NUL. */
 415     if ((m & NSControlKeyMask) && n == 1 &&
 416         (cm == '2' || cm == '@' || cm == ' ') && c == cm) {
 417         output[1] = '\0';
 418         end = 2;
 419     }
 420
 421     /* We don't let MacOS tell us what Backspace is! We know better. */
 422     if (cm == 0x7F && !(m & NSShiftKeyMask)) {
 423         coutput[1] = cfg.bksp_is_delete ? '\x7F' : '\x08';
 424         end = 2;
 425         use_coutput = special = TRUE;
 426     }
 427     /* For Shift Backspace, do opposite of what is configured. */
 428     if (cm == 0x7F && (m & NSShiftKeyMask)) {
 429         coutput[1] = cfg.bksp_is_delete ? '\x08' : '\x7F';
 430         end = 2;
 431         use_coutput = special = TRUE;
 432     }
 433
 434     /* Shift-Tab is ESC [ Z. Oddly, this combination generates ^Y by
 435      * default on MacOS! */
 436     if (cm == 0x19 && (m & NSShiftKeyMask) && !(m & NSControlKeyMask)) {
 437         end = 1;
 438         output[end++] = '\033';
 439         output[end++] = '[';
 440         output[end++] = 'Z';
 441     }
 442
 443     /*
 444      * NetHack keypad mode.
 445      */
 446     if (cfg.nethack_keypad && (m & NSNumericPadKeyMask)) {
 447         wchar_t *keys = NULL;
 448         switch (cm) {
 449           case '1': keys = L"bB"; break;
 450           case '2': keys = L"jJ"; break;
 451           case '3': keys = L"nN"; break;
 452           case '4': keys = L"hH"; break;
 453           case '5': keys = L".."; break;
 454           case '6': keys = L"lL"; break;
 455           case '7': keys = L"yY"; break;
 456           case '8': keys = L"kK"; break;
 457           case '9': keys = L"uU"; break;
 458         }
 459         if (keys) {
 460             end = 2;
 461             if (m & NSShiftKeyMask)
 462                 output[1] = keys[1];
 463             else
 464                 output[1] = keys[0];
 465             goto done;
 466         }
 467     }
 468
 469     /*
 470      * Application keypad mode.
 471      */
 472     if (term->app_keypad_keys && !cfg.no_applic_k &&
 473         (m & NSNumericPadKeyMask)) {
 474         int xkey = 0;
 475         switch (cm) {
 476           case NSClearLineFunctionKey: xkey = 'P'; break;
 477           case '=': xkey = 'Q'; break;
 478           case '/': xkey = 'R'; break;
 479           case '*': xkey = 'S'; break;
 480             /*
 481              * FIXME: keypad - and + need to be mapped to ESC O l
 482              * and ESC O k, or ESC O l and ESC O m, depending on
 483              * xterm function key mode, and I can't remember which
 484              * goes where.
 485              */
 486           case '\003': xkey = 'M'; break;
 487           case '0': xkey = 'p'; break;
 488           case '1': xkey = 'q'; break;
 489           case '2': xkey = 'r'; break;
 490           case '3': xkey = 's'; break;
 491           case '4': xkey = 't'; break;
 492           case '5': xkey = 'u'; break;
 493           case '6': xkey = 'v'; break;
 494           case '7': xkey = 'w'; break;
 495           case '8': xkey = 'x'; break;
 496           case '9': xkey = 'y'; break;
 497           case '.': xkey = 'n'; break;
 498         }
 499         if (xkey) {
 500             if (term->vt52_mode) {
 501                 if (xkey >= 'P' && xkey <= 'S') {
 502                     output[end++] = '\033';
 503                     output[end++] = xkey;
 504                 } else {
 505                     output[end++] = '\033';
 506                     output[end++] = '?';
 507                     output[end++] = xkey;
 508                 }
 509             } else {
 510                 output[end++] = '\033';
 511                 output[end++] = 'O';
 512                 output[end++] = xkey;
 513             }
 514             goto done;
 515         }
 516     }
 517
 518     /*
 519      * Next, all the keys that do tilde codes. (ESC '[' nn '~',
 520      * for integer decimal nn.)
 521      *
 522      * We also deal with the weird ones here. Linux VCs replace F1
 523      * to F5 by ESC [ [ A to ESC [ [ E. rxvt doesn't do _that_, but
 524      * does replace Home and End (1~ and 4~) by ESC [ H and ESC O w
 525      * respectively.
 526      */
 527     {
 528         int code = 0;
 529         switch (cm) {
 530           case NSF1FunctionKey:
 531             code = (m & NSShiftKeyMask ? 23 : 11);
 532             break;
 533           case NSF2FunctionKey:
 534             code = (m & NSShiftKeyMask ? 24 : 12);
 535             break;
 536           case NSF3FunctionKey:
 537             code = (m & NSShiftKeyMask ? 25 : 13);
 538             break;
 539           case NSF4FunctionKey:
 540             code = (m & NSShiftKeyMask ? 26 : 14);
 541             break;
 542           case NSF5FunctionKey:
 543             code = (m & NSShiftKeyMask ? 28 : 15);
 544             break;
 545           case NSF6FunctionKey:
 546             code = (m & NSShiftKeyMask ? 29 : 17);
 547             break;
 548           case NSF7FunctionKey:
 549             code = (m & NSShiftKeyMask ? 31 : 18);
 550             break;
 551           case NSF8FunctionKey:
 552             code = (m & NSShiftKeyMask ? 32 : 19);
 553             break;
 554           case NSF9FunctionKey:
 555             code = (m & NSShiftKeyMask ? 33 : 20);
 556             break;
 557           case NSF10FunctionKey:
 558             code = (m & NSShiftKeyMask ? 34 : 21);
 559             break;
 560           case NSF11FunctionKey:
 561             code = 23;
 562             break;
 563           case NSF12FunctionKey:
 564             code = 24;
 565             break;
 566           case NSF13FunctionKey:
 567             code = 25;
 568             break;
 569           case NSF14FunctionKey:
 570             code = 26;
 571             break;
 572           case NSF15FunctionKey:
 573             code = 28;
 574             break;
 575           case NSF16FunctionKey:
 576             code = 29;
 577             break;
 578           case NSF17FunctionKey:
 579             code = 31;
 580             break;
 581           case NSF18FunctionKey:
 582             code = 32;
 583             break;
 584           case NSF19FunctionKey:
 585             code = 33;
 586             break;
 587           case NSF20FunctionKey:
 588             code = 34;
 589             break;
 590         }
 591         if (!(m & NSControlKeyMask)) switch (cm) {
 592           case NSHomeFunctionKey:
 593             code = 1;
 594             break;
 595 #ifdef FIXME
 596           case GDK_Insert: case GDK_KP_Insert:
 597             code = 2;
 598             break;
 599 #endif
 600           case NSDeleteFunctionKey:
 601             code = 3;
 602             break;
 603           case NSEndFunctionKey:
 604             code = 4;
 605             break;
 606           case NSPageUpFunctionKey:
 607             code = 5;
 608             break;
 609           case NSPageDownFunctionKey:
 610             code = 6;
 611             break;
 612         }
 613         /* Reorder edit keys to physical order */
 614         if (cfg.funky_type == FUNKY_VT400 && code <= 6)
 615             code = "\0\2\1\4\5\3\6"[code];
 616
 617         if (term->vt52_mode && code > 0 && code <= 6) {
 618             output[end++] = '\033';
 619             output[end++] = " HLMEIG"[code];
 620             goto done;
 621         }
 622
 623         if (cfg.funky_type == FUNKY_SCO &&     /* SCO function keys */
 624             code >= 11 && code <= 34) {
 625             char codes[] = "MNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@[\\]^_`{";
 626             int index = 0;
 627             switch (cm) {
 628               case NSF1FunctionKey: index = 0; break;
 629               case NSF2FunctionKey: index = 1; break;
 630               case NSF3FunctionKey: index = 2; break;
 631               case NSF4FunctionKey: index = 3; break;
 632               case NSF5FunctionKey: index = 4; break;
 633               case NSF6FunctionKey: index = 5; break;
 634               case NSF7FunctionKey: index = 6; break;
 635               case NSF8FunctionKey: index = 7; break;
 636               case NSF9FunctionKey: index = 8; break;
 637               case NSF10FunctionKey: index = 9; break;
 638               case NSF11FunctionKey: index = 10; break;
 639               case NSF12FunctionKey: index = 11; break;
 640             }
 641             if (m & NSShiftKeyMask) index += 12;
 642             if (m & NSControlKeyMask) index += 24;
 643             output[end++] = '\033';
 644             output[end++] = '[';
 645             output[end++] = codes[index];
 646             goto done;
 647         }
 648         if (cfg.funky_type == FUNKY_SCO &&     /* SCO small keypad */
 649             code >= 1 && code <= 6) {
 650             char codes[] = "HL.FIG";
 651             if (code == 3) {
 652                 output[1] = '\x7F';
 653                 end = 2;
 654             } else {
 655                 output[end++] = '\033';
 656                 output[end++] = '[';
 657                 output[end++] = codes[code-1];
 658             }
 659             goto done;
 660         }
 661         if ((term->vt52_mode || cfg.funky_type == FUNKY_VT100P) &&
 662             code >= 11 && code <= 24) {
 663             int offt = 0;
 664             if (code > 15)
 665                 offt++;
 666             if (code > 21)
 667                 offt++;
 668             if (term->vt52_mode) {
 669                 output[end++] = '\033';
 670                 output[end++] = code + 'P' - 11 - offt;
 671             } else {
 672                 output[end++] = '\033';
 673                 output[end++] = 'O';
 674                 output[end++] = code + 'P' - 11 - offt;
 675             }
 676             goto done;
 677         }
 678         if (cfg.funky_type == FUNKY_LINUX && code >= 11 && code <= 15) {
 679             output[end++] = '\033';
 680             output[end++] = '[';
 681             output[end++] = '[';
 682             output[end++] = code + 'A' - 11;
 683             goto done;
 684         }
 685         if (cfg.funky_type == FUNKY_XTERM && code >= 11 && code <= 14) {
 686             if (term->vt52_mode) {
 687                 output[end++] = '\033';
 688                 output[end++] = code + 'P' - 11;
 689             } else {
 690                 output[end++] = '\033';
 691                 output[end++] = 'O';
 692                 output[end++] = code + 'P' - 11;
 693             }
 694             goto done;
 695         }
 696         if (cfg.rxvt_homeend && (code == 1 || code == 4)) {
 697             if (code == 1) {
 698                 output[end++] = '\033';
 699                 output[end++] = '[';
 700                 output[end++] = 'H';
 701             } else {
 702                 output[end++] = '\033';
 703                 output[end++] = 'O';
 704                 output[end++] = 'w';
 705             }
 706             goto done;
 707         }
 708         if (code) {
 709             char buf[20];
 710             sprintf(buf, "\x1B[%d~", code);
 711             for (i = 0; buf[i]; i++)
 712                 output[end++] = buf[i];
 713             goto done;
 714         }
 715     }
 716
 717     /*
 718      * Cursor keys. (This includes the numberpad cursor keys,
 719      * if we haven't already done them due to app keypad mode.)
 720      */
 721     {
 722         int xkey = 0;
 723         switch (cm) {
 724           case NSUpArrowFunctionKey: xkey = 'A'; break;
 725           case NSDownArrowFunctionKey: xkey = 'B'; break;
 726           case NSRightArrowFunctionKey: xkey = 'C'; break;
 727           case NSLeftArrowFunctionKey: xkey = 'D'; break;
 728         }
 729         if (xkey) {
 730             /*
 731              * The arrow keys normally do ESC [ A and so on. In
 732              * app cursor keys mode they do ESC O A instead.
 733              * Ctrl toggles the two modes.
 734              */
 735             if (term->vt52_mode) {
 736                 output[end++] = '\033';
 737                 output[end++] = xkey;
 738             } else if (!term->app_cursor_keys ^ !(m & NSControlKeyMask)) {
 739                 output[end++] = '\033';
 740                 output[end++] = 'O';
 741                 output[end++] = xkey;
 742             } else {
 743                 output[end++] = '\033';
 744                 output[end++] = '[';
 745                 output[end++] = xkey;
 746             }
 747             goto done;
 748         }
 749     }
 750
 751     done:
 752
 753     /*
 754      * Failing everything else, send the exact Unicode we got from
 755      * OS X.
 756      */
 757     if (end == start) {
 758         if (n > lenof(output)-start)
 759             n = lenof(output)-start;   /* _shouldn't_ happen! */
 760         for (i = 0; i < n; i++) {
 761             output[i+start] = [s characterAtIndex:i];
 762         }
 763         end = n+start;
 764     }
 765
 766     if (use_coutput) {
 767         assert(special);
 768         assert(end < lenof(coutput));
 769         coutput[end] = '\0';
 770         ldisc_send(ldisc, coutput+start, -2, TRUE);
 771     } else {
 772         luni_send(ldisc, output+start, end-start, TRUE);
 773     }
 774 }
 775
 776 - (int)fromBackend:(const char *)data len:(int)len isStderr:(int)is_stderr
 777 {
 778     return term_data(term, is_stderr, data, len);
 779 }
 780
 781 @end
 782
 783 int from_backend(void *frontend, int is_stderr, const char *data, int len)
 784 {
 785     SessionWindow *win = (SessionWindow *)frontend;
 786     return [win fromBackend:data len:len isStderr:is_stderr];
 787 }
 788
 789 void frontend_keypress(void *handle)
 790 {
 791     /* FIXME */
 792 }
 793
 794 void connection_fatal(void *frontend, char *p, ...)
 795 {
 796     //SessionWindow *win = (SessionWindow *)frontend;
 797     /* FIXME: proper OS X GUI stuff */
 798     va_list ap;
 799     fprintf(stderr, "FATAL ERROR: ");
 800     va_start(ap, p);
 801     vfprintf(stderr, p, ap);
 802     va_end(ap);
 803     fputc('\n', stderr);
 804     exit(1);
 805 }
 806
 807 void notify_remote_exit(void *frontend)
 808 {
 809     //SessionWindow *win = (SessionWindow *)frontend;
 810     /* FIXME */
 811 }
 812
 813 void ldisc_update(void *frontend, int echo, int edit)
 814 {
 815     //SessionWindow *win = (SessionWindow *)frontend;
 816     /*
 817      * In a GUI front end, this need do nothing.
 818      */
 819 }
 820
 821 void update_specials_menu(void *frontend)
 822 {
 823     //SessionWindow *win = (SessionWindow *)frontend;
 824     /* FIXME */
 825 }
 826
 827 /*
 828  * This is still called when mode==BELL_VISUAL, even though the
 829  * visual bell is handled entirely within terminal.c, because we
 830  * may want to perform additional actions on any kind of bell (for
 831  * example, taskbar flashing in Windows).
 832  */
 833 void beep(void *frontend, int mode)
 834 {
 835     //SessionWindow *win = (SessionWindow *)frontend;
 836     if (mode != BELL_VISUAL)
 837         NSBeep();
 838 }
 839
 840 int char_width(Context ctx, int uc)
 841 {
 842     /*
 843      * Under X, any fixed-width font really _is_ fixed-width.
 844      * Double-width characters will be dealt with using a separate
 845      * font. For the moment we can simply return 1.
 846      */
 847     return 1;
 848 }
 849
 850 void palette_set(void *frontend, int n, int r, int g, int b)
 851 {
 852     SessionWindow *win = (SessionWindow *)frontend;
 853
 854     if (n >= 16)
 855         n += 256 - 16;
 856     if (n > NALLCOLOURS)
 857         return;
 858     [win setColour:n r:r/255.0 g:g/255.0 b:b/255.0];
 859
 860     /*
 861      * FIXME: do we need an OS X equivalent of set_window_background?
 862      */
 863 }
 864
 865 void palette_reset(void *frontend)
 866 {
 867     SessionWindow *win = (SessionWindow *)frontend;
 868     Config *cfg = [win cfg];
 869
 870     /* This maps colour indices in cfg to those used in colours[]. */
 871     static const int ww[] = {
 872         256, 257, 258, 259, 260, 261,
 873         0, 8, 1, 9, 2, 10, 3, 11,
 874         4, 12, 5, 13, 6, 14, 7, 15
 875     };
 876
 877     int i;
 878
 879     for (i = 0; i < NCFGCOLOURS; i++) {
 880         [win setColour:ww[i] r:cfg->colours[i][0]/255.0
 881          g:cfg->colours[i][1]/255.0 b:cfg->colours[i][2]/255.0];
 882     }
 883
 884     for (i = 0; i < NEXTCOLOURS; i++) {
 885         if (i < 216) {
 886             int r = i / 36, g = (i / 6) % 6, b = i % 6;
 887             [win setColour:i+16 r:r/5.0 g:g/5.0 b:b/5.0];
 888         } else {
 889             int shade = i - 216;
 890             float fshade = (shade + 1) / (float)(NEXTCOLOURS - 216 + 1);
 891             [win setColour:i+16 r:fshade g:fshade b:fshade];
 892         }
 893     }
 894
 895     /*
 896      * FIXME: do we need an OS X equivalent of set_window_background?
 897      */
 898 }
 899
 900 Context get_ctx(void *frontend)
 901 {
 902     SessionWindow *win = (SessionWindow *)frontend;
 903
 904     /*
 905      * Lock the drawing focus on the image inside the TerminalView.
 906      */
 907     [win drawStartFinish:YES];
 908
 909     [[NSGraphicsContext currentContext] setShouldAntialias:YES];
 910
 911     /*
 912      * Cocoa drawing functions don't take a graphics context: that
 913      * parameter is implicit. Therefore, we'll use the frontend
 914      * handle itself as the context, on the grounds that it's as
 915      * good a thing to use as any.
 916      */
 917     return frontend;
 918 }
 919
 920 void free_ctx(Context ctx)
 921 {
 922     SessionWindow *win = (SessionWindow *)ctx;
 923
 924     [win drawStartFinish:NO];
 925 }
 926
 927 void do_text(Context ctx, int x, int y, wchar_t *text, int len,
 928              unsigned long attr, int lattr)
 929 {
 930     SessionWindow *win = (SessionWindow *)ctx;
 931
 932     [win doText:text len:len x:x y:y attr:attr lattr:lattr];
 933 }
 934
 935 void do_cursor(Context ctx, int x, int y, wchar_t *text, int len,
 936                unsigned long attr, int lattr)
 937 {
 938     SessionWindow *win = (SessionWindow *)ctx;
 939     Config *cfg = [win cfg];
 940     int active, passive;
 941
 942     if (attr & TATTR_PASCURS) {
 943         attr &= ~TATTR_PASCURS;
 944         passive = 1;
 945     } else
 946         passive = 0;
 947     if ((attr & TATTR_ACTCURS) && cfg->cursor_type != 0) {
 948         attr &= ~TATTR_ACTCURS;
 949         active = 1;
 950     } else
 951         active = 0;
 952
 953     [win doText:text len:len x:x y:y attr:attr lattr:lattr];
 954
 955     /*
 956      * FIXME: now draw the various cursor types (both passive and
 957      * active underlines and vertical lines, plus passive blocks).
 958      */
 959 }
 960
 961 /*
 962  * Minimise or restore the window in response to a server-side
 963  * request.
 964  */
 965 void set_iconic(void *frontend, int iconic)
 966 {
 967     //SessionWindow *win = (SessionWindow *)frontend;
 968     /* FIXME */
 969 }
 970
 971 /*
 972  * Move the window in response to a server-side request.
 973  */
 974 void move_window(void *frontend, int x, int y)
 975 {
 976     //SessionWindow *win = (SessionWindow *)frontend;
 977     /* FIXME */
 978 }
 979
 980 /*
 981  * Move the window to the top or bottom of the z-order in response
 982  * to a server-side request.
 983  */
 984 void set_zorder(void *frontend, int top)
 985 {
 986     //SessionWindow *win = (SessionWindow *)frontend;
 987     /* FIXME */
 988 }
 989
 990 /*
 991  * Refresh the window in response to a server-side request.
 992  */
 993 void refresh_window(void *frontend)
 994 {
 995     //SessionWindow *win = (SessionWindow *)frontend;
 996     /* FIXME */
 997 }
 998
 999 /*
1000  * Maximise or restore the window in response to a server-side
1001  * request.
1002  */
1003 void set_zoomed(void *frontend, int zoomed)
1004 {
1005     //SessionWindow *win = (SessionWindow *)frontend;
1006     /* FIXME */
1007 }
1008
1009 /*
1010  * Report whether the window is iconic, for terminal reports.
1011  */
1012 int is_iconic(void *frontend)
1013 {
1014     //SessionWindow *win = (SessionWindow *)frontend;
1015     return NO;                         /* FIXME */
1016 }
1017
1018 /*
1019  * Report the window's position, for terminal reports.
1020  */
1021 void get_window_pos(void *frontend, int *x, int *y)
1022 {
1023     //SessionWindow *win = (SessionWindow *)frontend;
1024     /* FIXME */
1025 }
1026
1027 /*
1028  * Report the window's pixel size, for terminal reports.
1029  */
1030 void get_window_pixels(void *frontend, int *x, int *y)
1031 {
1032     //SessionWindow *win = (SessionWindow *)frontend;
1033     /* FIXME */
1034 }
1035
1036 /*
1037  * Return the window or icon title.
1038  */
1039 char *get_window_title(void *frontend, int icon)
1040 {
1041     //SessionWindow *win = (SessionWindow *)frontend;
1042     return NULL; /* FIXME */
1043 }
1044
1045 void set_title(void *frontend, char *title)
1046 {
1047     //SessionWindow *win = (SessionWindow *)frontend;
1048     /* FIXME */
1049 }
1050
1051 void set_icon(void *frontend, char *title)
1052 {
1053     //SessionWindow *win = (SessionWindow *)frontend;
1054     /* FIXME */
1055 }
1056
1057 void set_sbar(void *frontend, int total, int start, int page)
1058 {
1059     //SessionWindow *win = (SessionWindow *)frontend;
1060     /* FIXME */
1061 }
1062
1063 void get_clip(void *frontend, wchar_t ** p, int *len)
1064 {
1065     //SessionWindow *win = (SessionWindow *)frontend;
1066     /* FIXME */
1067 }
1068
1069 void write_clip(void *frontend, wchar_t * data, int len, int must_deselect)
1070 {
1071     //SessionWindow *win = (SessionWindow *)frontend;
1072     /* FIXME */
1073 }
1074
1075 void request_paste(void *frontend)
1076 {
1077     //SessionWindow *win = (SessionWindow *)frontend;
1078     /* FIXME */
1079 }
1080
1081 void set_raw_mouse_mode(void *frontend, int activate)
1082 {
1083     //SessionWindow *win = (SessionWindow *)frontend;
1084     /* FIXME */
1085 }
1086
1087 void request_resize(void *frontend, int w, int h)
1088 {
1089     //SessionWindow *win = (SessionWindow *)frontend;
1090     /* FIXME */
1091 }
1092
1093 void sys_cursor(void *frontend, int x, int y)
1094 {
1095     //SessionWindow *win = (SessionWindow *)frontend;
1096     /*
1097      * This is probably meaningless under OS X. FIXME: find out for
1098      * sure.
1099      */
1100 }
1101
1102 void logevent(void *frontend, const char *string)
1103 {
1104     //SessionWindow *win = (SessionWindow *)frontend;
1105     /* FIXME */
1106 printf("logevent: %s\n", string);
1107 }
1108
1109 int font_dimension(void *frontend, int which)/* 0 for width, 1 for height */
1110 {
1111     //SessionWindow *win = (SessionWindow *)frontend;
1112     return 1; /* FIXME */
1113 }
1114
1115 void set_busy_status(void *frontend, int status)
1116 {
1117     /*
1118      * We need do nothing here: the OS X `application is busy'
1119      * beachball pointer appears _automatically_ when the
1120      * application isn't responding to GUI messages.
1121      */
1122 }