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     alert_ctx = NULL;
 211
 212     cfg = aCfg;                        /* structure copy */
 213
 214     init_ucs(&ucsdata, cfg.line_codepage, cfg.utf8_override,
 215              CS_UTF8, cfg.vtmode);
 216     term = term_init(&cfg, &ucsdata, self);
 217     logctx = log_init(self, &cfg);
 218     term_provide_logctx(term, logctx);
 219     term_size(term, cfg.height, cfg.width, cfg.savelines);
 220
 221     termview = [[[TerminalView alloc] initWithTerminal:term config:cfg]
 222                 autorelease];
 223
 224     /*
 225      * Now work out the size of the window.
 226      */
 227     rect = [termview frame];
 228     rect.origin = NSMakePoint(0,0);
 229     rect.size.width += 2 * cfg.window_border;
 230     rect.size.height += 2 * cfg.window_border;
 231
 232     /*
 233      * Set up a backend.
 234      */
 235     {
 236         int i;
 237         back = &pty_backend;
 238         for (i = 0; backends[i].backend != NULL; i++)
 239             if (backends[i].protocol == cfg.protocol) {
 240                 back = backends[i].backend;
 241                 break;
 242             }
 243     }
 244
 245     {
 246         const char *error;
 247         char *realhost = NULL;
 248         error = back->init(self, &backhandle, &cfg, cfg.host, cfg.port,
 249                            &realhost, cfg.tcp_nodelay, cfg.tcp_keepalives);
 250         if (error) {
 251             fatalbox("%s\n", error);   /* FIXME: connection_fatal at worst */
 252         }
 253
 254         if (realhost)
 255             sfree(realhost);           /* FIXME: do something with this */
 256     }
 257     back->provide_logctx(backhandle, logctx);
 258
 259     /*
 260      * Create a line discipline. (This must be done after creating
 261      * the terminal _and_ the backend, since it needs to be passed
 262      * pointers to both.)
 263      */
 264     ldisc = ldisc_create(&cfg, term, back, backhandle, self);
 265
 266     /*
 267      * FIXME: Set up a scrollbar.
 268      */
 269
 270     self = [super initWithContentRect:rect
 271             styleMask:(NSTitledWindowMask | NSMiniaturizableWindowMask |
 272                        NSClosableWindowMask)
 273             backing:NSBackingStoreBuffered
 274             defer:YES];
 275     [self setTitle:@"PuTTY"];
 276
 277     [self setIgnoresMouseEvents:NO];
 278
 279     /*
 280      * Put the terminal view in the window.
 281      */
 282     rect = [termview frame];
 283     rect.origin = NSMakePoint(cfg.window_border, cfg.window_border);
 284     [termview setFrame:rect];
 285     [[self contentView] addSubview:termview];
 286
 287     /*
 288      * Set up the colour palette.
 289      */
 290     palette_reset(self);
 291
 292     /*
 293      * FIXME: Only the _first_ document window should be centred.
 294      * The subsequent ones should appear down and to the right of
 295      * it, probably using the cascade function provided by Cocoa.
 296      * Also we're apparently required by the HIG to remember and
 297      * reuse previous positions of windows, although I'm not sure
 298      * how that works if the user opens more than one of the same
 299      * session type.
 300      */
 301     [self center];                     /* :-) */
 302
 303     exited = FALSE;
 304
 305     return self;
 306 }
 307
 308 - (void)dealloc
 309 {
 310     /*
 311      * FIXME: Here we must deallocate all sorts of stuff: the
 312      * terminal, the backend, the ldisc, the logctx, you name it.
 313      * Do so.
 314      */
 315     sfree(alert_ctx);
 316     if (term)
 317         term_free(term);
 318     if (logctx)
 319         log_free(logctx);
 320     if (back)
 321         back->free(backhandle);
 322     if (ldisc)
 323         ldisc_free(ldisc);
 324     [super dealloc];
 325 }
 326
 327 - (void)drawStartFinish:(BOOL)start
 328 {
 329     [termview drawStartFinish:start];
 330 }
 331
 332 - (void)setColour:(int)n r:(float)r g:(float)g b:(float)b
 333 {
 334     [termview setColour:n r:r g:g b:b];
 335 }
 336
 337 - (void)doText:(wchar_t *)text len:(int)len x:(int)x y:(int)y
 338     attr:(unsigned long)attr lattr:(int)lattr
 339 {
 340     /* Pass this straight on to the TerminalView. */
 341     [termview doText:text len:len x:x y:y attr:attr lattr:lattr];
 342 }
 343
 344 - (Config *)cfg
 345 {
 346     return &cfg;
 347 }
 348
 349 - (void)keyDown:(NSEvent *)ev
 350 {
 351     NSString *s = [ev characters];
 352     int i;
 353     int n = [s length], c = [s characterAtIndex:0], m = [ev modifierFlags];
 354     int cm = [[ev charactersIgnoringModifiers] characterAtIndex:0];
 355     wchar_t output[32];
 356     char coutput[32];
 357     int use_coutput = FALSE, special = FALSE, start, end;
 358
 359 //printf("n=%d c=U+%04x cm=U+%04x m=%08x\n", n, c, cm, m);
 360
 361     /*
 362      * FIXME: Alt+numberpad codes.
 363      */
 364
 365     /*
 366      * Shift and Ctrl with PageUp/PageDown for scrollback.
 367      */
 368     if (n == 1 && c == NSPageUpFunctionKey && (m & NSShiftKeyMask)) {
 369         term_scroll(term, 0, -term->rows/2);
 370         return;
 371     }
 372     if (n == 1 && c == NSPageUpFunctionKey && (m & NSControlKeyMask)) {
 373         term_scroll(term, 0, -1);
 374         return;
 375     }
 376     if (n == 1 && c == NSPageDownFunctionKey && (m & NSShiftKeyMask)) {
 377         term_scroll(term, 0, +term->rows/2);
 378         return;
 379     }
 380     if (n == 1 && c == NSPageDownFunctionKey && (m & NSControlKeyMask)) {
 381         term_scroll(term, 0, +1);
 382         return;
 383     }
 384
 385     /*
 386      * FIXME: Shift-Ins for paste? Or is that not Maccy enough?
 387      */
 388
 389     /*
 390      * FIXME: Alt (Option? Command?) prefix in general.
 391      *
 392      * (Note that Alt-Shift-thing will work just by looking at
 393      * charactersIgnoringModifiers; but Alt-Ctrl-thing will need
 394      * processing properly, and Alt-as-in-Option won't happen at
 395      * all. Hmmm.)
 396      *
 397      * (Note also that we need to be able to override menu key
 398      * equivalents before this is particularly useful.)
 399      */
 400     start = 1;
 401     end = start;
 402
 403     /*
 404      * Ctrl-` is the same as Ctrl-\, unless we already have a
 405      * better idea.
 406      */
 407     if ((m & NSControlKeyMask) && n == 1 && cm == '`' && c == '`') {
 408         output[1] = '\x1c';
 409         end = 2;
 410     }
 411
 412     /* We handle Return ourselves, because it needs to be flagged as
 413      * special to ldisc. */
 414     if (n == 1 && c == '\015') {
 415         coutput[1] = '\015';
 416         use_coutput = TRUE;
 417         end = 2;
 418         special = TRUE;
 419     }
 420
 421     /* Control-Shift-Space is 160 (ISO8859 nonbreaking space) */
 422     if (n == 1 && (m & NSControlKeyMask) && (m & NSShiftKeyMask) &&
 423         cm == ' ') {
 424         output[1] = '\240';
 425         end = 2;
 426     }
 427
 428     /* Control-2, Control-Space and Control-@ are all NUL. */
 429     if ((m & NSControlKeyMask) && n == 1 &&
 430         (cm == '2' || cm == '@' || cm == ' ') && c == cm) {
 431         output[1] = '\0';
 432         end = 2;
 433     }
 434
 435     /* We don't let MacOS tell us what Backspace is! We know better. */
 436     if (cm == 0x7F && !(m & NSShiftKeyMask)) {
 437         coutput[1] = cfg.bksp_is_delete ? '\x7F' : '\x08';
 438         end = 2;
 439         use_coutput = special = TRUE;
 440     }
 441     /* For Shift Backspace, do opposite of what is configured. */
 442     if (cm == 0x7F && (m & NSShiftKeyMask)) {
 443         coutput[1] = cfg.bksp_is_delete ? '\x08' : '\x7F';
 444         end = 2;
 445         use_coutput = special = TRUE;
 446     }
 447
 448     /* Shift-Tab is ESC [ Z. Oddly, this combination generates ^Y by
 449      * default on MacOS! */
 450     if (cm == 0x19 && (m & NSShiftKeyMask) && !(m & NSControlKeyMask)) {
 451         end = 1;
 452         output[end++] = '\033';
 453         output[end++] = '[';
 454         output[end++] = 'Z';
 455     }
 456
 457     /*
 458      * NetHack keypad mode.
 459      */
 460     if (cfg.nethack_keypad && (m & NSNumericPadKeyMask)) {
 461         wchar_t *keys = NULL;
 462         switch (cm) {
 463           case '1': keys = L"bB"; break;
 464           case '2': keys = L"jJ"; break;
 465           case '3': keys = L"nN"; break;
 466           case '4': keys = L"hH"; break;
 467           case '5': keys = L".."; break;
 468           case '6': keys = L"lL"; break;
 469           case '7': keys = L"yY"; break;
 470           case '8': keys = L"kK"; break;
 471           case '9': keys = L"uU"; break;
 472         }
 473         if (keys) {
 474             end = 2;
 475             if (m & NSShiftKeyMask)
 476                 output[1] = keys[1];
 477             else
 478                 output[1] = keys[0];
 479             goto done;
 480         }
 481     }
 482
 483     /*
 484      * Application keypad mode.
 485      */
 486     if (term->app_keypad_keys && !cfg.no_applic_k &&
 487         (m & NSNumericPadKeyMask)) {
 488         int xkey = 0;
 489         switch (cm) {
 490           case NSClearLineFunctionKey: xkey = 'P'; break;
 491           case '=': xkey = 'Q'; break;
 492           case '/': xkey = 'R'; break;
 493           case '*': xkey = 'S'; break;
 494             /*
 495              * FIXME: keypad - and + need to be mapped to ESC O l
 496              * and ESC O k, or ESC O l and ESC O m, depending on
 497              * xterm function key mode, and I can't remember which
 498              * goes where.
 499              */
 500           case '\003': xkey = 'M'; break;
 501           case '0': xkey = 'p'; break;
 502           case '1': xkey = 'q'; break;
 503           case '2': xkey = 'r'; break;
 504           case '3': xkey = 's'; break;
 505           case '4': xkey = 't'; break;
 506           case '5': xkey = 'u'; break;
 507           case '6': xkey = 'v'; break;
 508           case '7': xkey = 'w'; break;
 509           case '8': xkey = 'x'; break;
 510           case '9': xkey = 'y'; break;
 511           case '.': xkey = 'n'; break;
 512         }
 513         if (xkey) {
 514             if (term->vt52_mode) {
 515                 if (xkey >= 'P' && xkey <= 'S') {
 516                     output[end++] = '\033';
 517                     output[end++] = xkey;
 518                 } else {
 519                     output[end++] = '\033';
 520                     output[end++] = '?';
 521                     output[end++] = xkey;
 522                 }
 523             } else {
 524                 output[end++] = '\033';
 525                 output[end++] = 'O';
 526                 output[end++] = xkey;
 527             }
 528             goto done;
 529         }
 530     }
 531
 532     /*
 533      * Next, all the keys that do tilde codes. (ESC '[' nn '~',
 534      * for integer decimal nn.)
 535      *
 536      * We also deal with the weird ones here. Linux VCs replace F1
 537      * to F5 by ESC [ [ A to ESC [ [ E. rxvt doesn't do _that_, but
 538      * does replace Home and End (1~ and 4~) by ESC [ H and ESC O w
 539      * respectively.
 540      */
 541     {
 542         int code = 0;
 543         switch (cm) {
 544           case NSF1FunctionKey:
 545             code = (m & NSShiftKeyMask ? 23 : 11);
 546             break;
 547           case NSF2FunctionKey:
 548             code = (m & NSShiftKeyMask ? 24 : 12);
 549             break;
 550           case NSF3FunctionKey:
 551             code = (m & NSShiftKeyMask ? 25 : 13);
 552             break;
 553           case NSF4FunctionKey:
 554             code = (m & NSShiftKeyMask ? 26 : 14);
 555             break;
 556           case NSF5FunctionKey:
 557             code = (m & NSShiftKeyMask ? 28 : 15);
 558             break;
 559           case NSF6FunctionKey:
 560             code = (m & NSShiftKeyMask ? 29 : 17);
 561             break;
 562           case NSF7FunctionKey:
 563             code = (m & NSShiftKeyMask ? 31 : 18);
 564             break;
 565           case NSF8FunctionKey:
 566             code = (m & NSShiftKeyMask ? 32 : 19);
 567             break;
 568           case NSF9FunctionKey:
 569             code = (m & NSShiftKeyMask ? 33 : 20);
 570             break;
 571           case NSF10FunctionKey:
 572             code = (m & NSShiftKeyMask ? 34 : 21);
 573             break;
 574           case NSF11FunctionKey:
 575             code = 23;
 576             break;
 577           case NSF12FunctionKey:
 578             code = 24;
 579             break;
 580           case NSF13FunctionKey:
 581             code = 25;
 582             break;
 583           case NSF14FunctionKey:
 584             code = 26;
 585             break;
 586           case NSF15FunctionKey:
 587             code = 28;
 588             break;
 589           case NSF16FunctionKey:
 590             code = 29;
 591             break;
 592           case NSF17FunctionKey:
 593             code = 31;
 594             break;
 595           case NSF18FunctionKey:
 596             code = 32;
 597             break;
 598           case NSF19FunctionKey:
 599             code = 33;
 600             break;
 601           case NSF20FunctionKey:
 602             code = 34;
 603             break;
 604         }
 605         if (!(m & NSControlKeyMask)) switch (cm) {
 606           case NSHomeFunctionKey:
 607             code = 1;
 608             break;
 609 #ifdef FIXME
 610           case GDK_Insert: case GDK_KP_Insert:
 611             code = 2;
 612             break;
 613 #endif
 614           case NSDeleteFunctionKey:
 615             code = 3;
 616             break;
 617           case NSEndFunctionKey:
 618             code = 4;
 619             break;
 620           case NSPageUpFunctionKey:
 621             code = 5;
 622             break;
 623           case NSPageDownFunctionKey:
 624             code = 6;
 625             break;
 626         }
 627         /* Reorder edit keys to physical order */
 628         if (cfg.funky_type == FUNKY_VT400 && code <= 6)
 629             code = "\0\2\1\4\5\3\6"[code];
 630
 631         if (term->vt52_mode && code > 0 && code <= 6) {
 632             output[end++] = '\033';
 633             output[end++] = " HLMEIG"[code];
 634             goto done;
 635         }
 636
 637         if (cfg.funky_type == FUNKY_SCO &&     /* SCO function keys */
 638             code >= 11 && code <= 34) {
 639             char codes[] = "MNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@[\\]^_`{";
 640             int index = 0;
 641             switch (cm) {
 642               case NSF1FunctionKey: index = 0; break;
 643               case NSF2FunctionKey: index = 1; break;
 644               case NSF3FunctionKey: index = 2; break;
 645               case NSF4FunctionKey: index = 3; break;
 646               case NSF5FunctionKey: index = 4; break;
 647               case NSF6FunctionKey: index = 5; break;
 648               case NSF7FunctionKey: index = 6; break;
 649               case NSF8FunctionKey: index = 7; break;
 650               case NSF9FunctionKey: index = 8; break;
 651               case NSF10FunctionKey: index = 9; break;
 652               case NSF11FunctionKey: index = 10; break;
 653               case NSF12FunctionKey: index = 11; break;
 654             }
 655             if (m & NSShiftKeyMask) index += 12;
 656             if (m & NSControlKeyMask) index += 24;
 657             output[end++] = '\033';
 658             output[end++] = '[';
 659             output[end++] = codes[index];
 660             goto done;
 661         }
 662         if (cfg.funky_type == FUNKY_SCO &&     /* SCO small keypad */
 663             code >= 1 && code <= 6) {
 664             char codes[] = "HL.FIG";
 665             if (code == 3) {
 666                 output[1] = '\x7F';
 667                 end = 2;
 668             } else {
 669                 output[end++] = '\033';
 670                 output[end++] = '[';
 671                 output[end++] = codes[code-1];
 672             }
 673             goto done;
 674         }
 675         if ((term->vt52_mode || cfg.funky_type == FUNKY_VT100P) &&
 676             code >= 11 && code <= 24) {
 677             int offt = 0;
 678             if (code > 15)
 679                 offt++;
 680             if (code > 21)
 681                 offt++;
 682             if (term->vt52_mode) {
 683                 output[end++] = '\033';
 684                 output[end++] = code + 'P' - 11 - offt;
 685             } else {
 686                 output[end++] = '\033';
 687                 output[end++] = 'O';
 688                 output[end++] = code + 'P' - 11 - offt;
 689             }
 690             goto done;
 691         }
 692         if (cfg.funky_type == FUNKY_LINUX && code >= 11 && code <= 15) {
 693             output[end++] = '\033';
 694             output[end++] = '[';
 695             output[end++] = '[';
 696             output[end++] = code + 'A' - 11;
 697             goto done;
 698         }
 699         if (cfg.funky_type == FUNKY_XTERM && code >= 11 && code <= 14) {
 700             if (term->vt52_mode) {
 701                 output[end++] = '\033';
 702                 output[end++] = code + 'P' - 11;
 703             } else {
 704                 output[end++] = '\033';
 705                 output[end++] = 'O';
 706                 output[end++] = code + 'P' - 11;
 707             }
 708             goto done;
 709         }
 710         if (cfg.rxvt_homeend && (code == 1 || code == 4)) {
 711             if (code == 1) {
 712                 output[end++] = '\033';
 713                 output[end++] = '[';
 714                 output[end++] = 'H';
 715             } else {
 716                 output[end++] = '\033';
 717                 output[end++] = 'O';
 718                 output[end++] = 'w';
 719             }
 720             goto done;
 721         }
 722         if (code) {
 723             char buf[20];
 724             sprintf(buf, "\x1B[%d~", code);
 725             for (i = 0; buf[i]; i++)
 726                 output[end++] = buf[i];
 727             goto done;
 728         }
 729     }
 730
 731     /*
 732      * Cursor keys. (This includes the numberpad cursor keys,
 733      * if we haven't already done them due to app keypad mode.)
 734      */
 735     {
 736         int xkey = 0;
 737         switch (cm) {
 738           case NSUpArrowFunctionKey: xkey = 'A'; break;
 739           case NSDownArrowFunctionKey: xkey = 'B'; break;
 740           case NSRightArrowFunctionKey: xkey = 'C'; break;
 741           case NSLeftArrowFunctionKey: xkey = 'D'; break;
 742         }
 743         if (xkey) {
 744             /*
 745              * The arrow keys normally do ESC [ A and so on. In
 746              * app cursor keys mode they do ESC O A instead.
 747              * Ctrl toggles the two modes.
 748              */
 749             if (term->vt52_mode) {
 750                 output[end++] = '\033';
 751                 output[end++] = xkey;
 752             } else if (!term->app_cursor_keys ^ !(m & NSControlKeyMask)) {
 753                 output[end++] = '\033';
 754                 output[end++] = 'O';
 755                 output[end++] = xkey;
 756             } else {
 757                 output[end++] = '\033';
 758                 output[end++] = '[';
 759                 output[end++] = xkey;
 760             }
 761             goto done;
 762         }
 763     }
 764
 765     done:
 766
 767     /*
 768      * Failing everything else, send the exact Unicode we got from
 769      * OS X.
 770      */
 771     if (end == start) {
 772         if (n > lenof(output)-start)
 773             n = lenof(output)-start;   /* _shouldn't_ happen! */
 774         for (i = 0; i < n; i++) {
 775             output[i+start] = [s characterAtIndex:i];
 776         }
 777         end = n+start;
 778     }
 779
 780     if (use_coutput) {
 781         assert(special);
 782         assert(end < lenof(coutput));
 783         coutput[end] = '\0';
 784         ldisc_send(ldisc, coutput+start, -2, TRUE);
 785     } else {
 786         luni_send(ldisc, output+start, end-start, TRUE);
 787     }
 788 }
 789
 790 - (int)fromBackend:(const char *)data len:(int)len isStderr:(int)is_stderr
 791 {
 792     return term_data(term, is_stderr, data, len);
 793 }
 794
 795 - (void)startAlert:(NSAlert *)alert
 796     withCallback:(void (*)(void *, int))callback andCtx:(void *)ctx
 797 {
 798     if (alert_ctx || alert_qhead) {
 799         /*
 800          * Queue this alert to be shown later.
 801          */
 802         struct alert_queue *qitem = snew(struct alert_queue);
 803         qitem->next = NULL;
 804         qitem->alert = alert;
 805         qitem->callback = callback;
 806         qitem->ctx = ctx;
 807         if (alert_qtail)
 808             alert_qtail->next = qitem;
 809         else
 810             alert_qhead = qitem;
 811         alert_qtail = qitem;
 812     } else {
 813         alert_callback = callback;
 814         alert_ctx = ctx;               /* NB this is assumed to need freeing! */
 815         [alert beginSheetModalForWindow:self modalDelegate:self
 816          didEndSelector:@selector(alertSheetDidEnd:returnCode:contextInfo:)
 817          contextInfo:NULL];
 818     }
 819 }
 820
 821 - (void)alertSheetDidEnd:(NSAlert *)alert returnCode:(int)returnCode
 822     contextInfo:(void *)contextInfo
 823 {
 824     [self performSelectorOnMainThread:
 825      @selector(alertSheetDidFinishEnding:)
 826      withObject:[NSNumber numberWithInt:returnCode]
 827      waitUntilDone:NO];
 828 }
 829
 830 - (void)alertSheetDidFinishEnding:(id)object
 831 {
 832     int returnCode = [object intValue];
 833
 834     alert_callback(alert_ctx, returnCode);   /* transfers ownership of ctx */
 835
 836     /*
 837      * If there's an alert in our queue (either already or because
 838      * the callback just queued it), start it.
 839      */
 840     if (alert_qhead) {
 841         struct alert_queue *qnext;
 842
 843         alert_callback = alert_qhead->callback;
 844         alert_ctx = alert_qhead->ctx;
 845         [alert_qhead->alert beginSheetModalForWindow:self modalDelegate:self
 846          didEndSelector:@selector(alertSheetDidEnd:returnCode:contextInfo:)
 847          contextInfo:NULL];
 848
 849         qnext = alert_qhead->next;
 850         sfree(alert_qhead);
 851         alert_qhead = qnext;
 852         if (!qnext)
 853             alert_qtail = NULL;
 854     } else {
 855         alert_ctx = NULL;
 856     }
 857 }
 858
 859 - (void)notifyRemoteExit
 860 {
 861     int exitcode;
 862
 863     if (!exited && (exitcode = back->exitcode(backhandle)) >= 0)
 864         [self endSession:(exitcode == 0)];
 865 }
 866
 867 - (void)endSession:(int)clean
 868 {
 869     exited = TRUE;
 870     if (ldisc) {
 871         ldisc_free(ldisc);
 872         ldisc = NULL;
 873     }
 874     if (back) {
 875         back->free(backhandle);
 876         backhandle = NULL;
 877         back = NULL;
 878         //FIXME: update specials menu;
 879     }
 880     if (cfg.close_on_exit == FORCE_ON ||
 881         (cfg.close_on_exit == AUTO && clean))
 882         [self close];
 883     // FIXME: else show restart menu item
 884 }
 885
 886 @end
 887
 888 int from_backend(void *frontend, int is_stderr, const char *data, int len)
 889 {
 890     SessionWindow *win = (SessionWindow *)frontend;
 891     return [win fromBackend:data len:len isStderr:is_stderr];
 892 }
 893
 894 void frontend_keypress(void *handle)
 895 {
 896     /* FIXME */
 897 }
 898
 899 void notify_remote_exit(void *frontend)
 900 {
 901     SessionWindow *win = (SessionWindow *)frontend;
 902
 903     [win notifyRemoteExit];
 904 }
 905
 906 void ldisc_update(void *frontend, int echo, int edit)
 907 {
 908     //SessionWindow *win = (SessionWindow *)frontend;
 909     /*
 910      * In a GUI front end, this need do nothing.
 911      */
 912 }
 913
 914 void update_specials_menu(void *frontend)
 915 {
 916     //SessionWindow *win = (SessionWindow *)frontend;
 917     /* FIXME */
 918 }
 919
 920 /*
 921  * This is still called when mode==BELL_VISUAL, even though the
 922  * visual bell is handled entirely within terminal.c, because we
 923  * may want to perform additional actions on any kind of bell (for
 924  * example, taskbar flashing in Windows).
 925  */
 926 void beep(void *frontend, int mode)
 927 {
 928     //SessionWindow *win = (SessionWindow *)frontend;
 929     if (mode != BELL_VISUAL)
 930         NSBeep();
 931 }
 932
 933 int char_width(Context ctx, int uc)
 934 {
 935     /*
 936      * Under X, any fixed-width font really _is_ fixed-width.
 937      * Double-width characters will be dealt with using a separate
 938      * font. For the moment we can simply return 1.
 939      */
 940     return 1;
 941 }
 942
 943 void palette_set(void *frontend, int n, int r, int g, int b)
 944 {
 945     SessionWindow *win = (SessionWindow *)frontend;
 946
 947     if (n >= 16)
 948         n += 256 - 16;
 949     if (n > NALLCOLOURS)
 950         return;
 951     [win setColour:n r:r/255.0 g:g/255.0 b:b/255.0];
 952
 953     /*
 954      * FIXME: do we need an OS X equivalent of set_window_background?
 955      */
 956 }
 957
 958 void palette_reset(void *frontend)
 959 {
 960     SessionWindow *win = (SessionWindow *)frontend;
 961     Config *cfg = [win cfg];
 962
 963     /* This maps colour indices in cfg to those used in colours[]. */
 964     static const int ww[] = {
 965         256, 257, 258, 259, 260, 261,
 966         0, 8, 1, 9, 2, 10, 3, 11,
 967         4, 12, 5, 13, 6, 14, 7, 15
 968     };
 969
 970     int i;
 971
 972     for (i = 0; i < NCFGCOLOURS; i++) {
 973         [win setColour:ww[i] r:cfg->colours[i][0]/255.0
 974          g:cfg->colours[i][1]/255.0 b:cfg->colours[i][2]/255.0];
 975     }
 976
 977     for (i = 0; i < NEXTCOLOURS; i++) {
 978         if (i < 216) {
 979             int r = i / 36, g = (i / 6) % 6, b = i % 6;
 980             [win setColour:i+16 r:r/5.0 g:g/5.0 b:b/5.0];
 981         } else {
 982             int shade = i - 216;
 983             float fshade = (shade + 1) / (float)(NEXTCOLOURS - 216 + 1);
 984             [win setColour:i+16 r:fshade g:fshade b:fshade];
 985         }
 986     }
 987
 988     /*
 989      * FIXME: do we need an OS X equivalent of set_window_background?
 990      */
 991 }
 992
 993 Context get_ctx(void *frontend)
 994 {
 995     SessionWindow *win = (SessionWindow *)frontend;
 996
 997     /*
 998      * Lock the drawing focus on the image inside the TerminalView.
 999      */
1000     [win drawStartFinish:YES];
1001
1002     [[NSGraphicsContext currentContext] setShouldAntialias:YES];
1003
1004     /*
1005      * Cocoa drawing functions don't take a graphics context: that
1006      * parameter is implicit. Therefore, we'll use the frontend
1007      * handle itself as the context, on the grounds that it's as
1008      * good a thing to use as any.
1009      */
1010     return frontend;
1011 }
1012
1013 void free_ctx(Context ctx)
1014 {
1015     SessionWindow *win = (SessionWindow *)ctx;
1016
1017     [win drawStartFinish:NO];
1018 }
1019
1020 void do_text(Context ctx, int x, int y, wchar_t *text, int len,
1021              unsigned long attr, int lattr)
1022 {
1023     SessionWindow *win = (SessionWindow *)ctx;
1024
1025     [win doText:text len:len x:x y:y attr:attr lattr:lattr];
1026 }
1027
1028 void do_cursor(Context ctx, int x, int y, wchar_t *text, int len,
1029                unsigned long attr, int lattr)
1030 {
1031     SessionWindow *win = (SessionWindow *)ctx;
1032     Config *cfg = [win cfg];
1033     int active, passive;
1034
1035     if (attr & TATTR_PASCURS) {
1036         attr &= ~TATTR_PASCURS;
1037         passive = 1;
1038     } else
1039         passive = 0;
1040     if ((attr & TATTR_ACTCURS) && cfg->cursor_type != 0) {
1041         attr &= ~TATTR_ACTCURS;
1042         active = 1;
1043     } else
1044         active = 0;
1045
1046     [win doText:text len:len x:x y:y attr:attr lattr:lattr];
1047
1048     /*
1049      * FIXME: now draw the various cursor types (both passive and
1050      * active underlines and vertical lines, plus passive blocks).
1051      */
1052 }
1053
1054 /*
1055  * Minimise or restore the window in response to a server-side
1056  * request.
1057  */
1058 void set_iconic(void *frontend, int iconic)
1059 {
1060     //SessionWindow *win = (SessionWindow *)frontend;
1061     /* FIXME */
1062 }
1063
1064 /*
1065  * Move the window in response to a server-side request.
1066  */
1067 void move_window(void *frontend, int x, int y)
1068 {
1069     //SessionWindow *win = (SessionWindow *)frontend;
1070     /* FIXME */
1071 }
1072
1073 /*
1074  * Move the window to the top or bottom of the z-order in response
1075  * to a server-side request.
1076  */
1077 void set_zorder(void *frontend, int top)
1078 {
1079     //SessionWindow *win = (SessionWindow *)frontend;
1080     /* FIXME */
1081 }
1082
1083 /*
1084  * Refresh the window in response to a server-side request.
1085  */
1086 void refresh_window(void *frontend)
1087 {
1088     //SessionWindow *win = (SessionWindow *)frontend;
1089     /* FIXME */
1090 }
1091
1092 /*
1093  * Maximise or restore the window in response to a server-side
1094  * request.
1095  */
1096 void set_zoomed(void *frontend, int zoomed)
1097 {
1098     //SessionWindow *win = (SessionWindow *)frontend;
1099     /* FIXME */
1100 }
1101
1102 /*
1103  * Report whether the window is iconic, for terminal reports.
1104  */
1105 int is_iconic(void *frontend)
1106 {
1107     //SessionWindow *win = (SessionWindow *)frontend;
1108     return NO;                         /* FIXME */
1109 }
1110
1111 /*
1112  * Report the window's position, for terminal reports.
1113  */
1114 void get_window_pos(void *frontend, int *x, int *y)
1115 {
1116     //SessionWindow *win = (SessionWindow *)frontend;
1117     /* FIXME */
1118 }
1119
1120 /*
1121  * Report the window's pixel size, for terminal reports.
1122  */
1123 void get_window_pixels(void *frontend, int *x, int *y)
1124 {
1125     //SessionWindow *win = (SessionWindow *)frontend;
1126     /* FIXME */
1127 }
1128
1129 /*
1130  * Return the window or icon title.
1131  */
1132 char *get_window_title(void *frontend, int icon)
1133 {
1134     //SessionWindow *win = (SessionWindow *)frontend;
1135     return NULL; /* FIXME */
1136 }
1137
1138 void set_title(void *frontend, char *title)
1139 {
1140     //SessionWindow *win = (SessionWindow *)frontend;
1141     /* FIXME */
1142 }
1143
1144 void set_icon(void *frontend, char *title)
1145 {
1146     //SessionWindow *win = (SessionWindow *)frontend;
1147     /* FIXME */
1148 }
1149
1150 void set_sbar(void *frontend, int total, int start, int page)
1151 {
1152     //SessionWindow *win = (SessionWindow *)frontend;
1153     /* FIXME */
1154 }
1155
1156 void get_clip(void *frontend, wchar_t ** p, int *len)
1157 {
1158     //SessionWindow *win = (SessionWindow *)frontend;
1159     /* FIXME */
1160 }
1161
1162 void write_clip(void *frontend, wchar_t * data, int len, int must_deselect)
1163 {
1164     //SessionWindow *win = (SessionWindow *)frontend;
1165     /* FIXME */
1166 }
1167
1168 void request_paste(void *frontend)
1169 {
1170     //SessionWindow *win = (SessionWindow *)frontend;
1171     /* FIXME */
1172 }
1173
1174 void set_raw_mouse_mode(void *frontend, int activate)
1175 {
1176     //SessionWindow *win = (SessionWindow *)frontend;
1177     /* FIXME */
1178 }
1179
1180 void request_resize(void *frontend, int w, int h)
1181 {
1182     //SessionWindow *win = (SessionWindow *)frontend;
1183     /* FIXME */
1184 }
1185
1186 void sys_cursor(void *frontend, int x, int y)
1187 {
1188     //SessionWindow *win = (SessionWindow *)frontend;
1189     /*
1190      * This is probably meaningless under OS X. FIXME: find out for
1191      * sure.
1192      */
1193 }
1194
1195 void logevent(void *frontend, const char *string)
1196 {
1197     //SessionWindow *win = (SessionWindow *)frontend;
1198     /* FIXME */
1199 printf("logevent: %s\n", string);
1200 }
1201
1202 int font_dimension(void *frontend, int which)/* 0 for width, 1 for height */
1203 {
1204     //SessionWindow *win = (SessionWindow *)frontend;
1205     return 1; /* FIXME */
1206 }
1207
1208 void set_busy_status(void *frontend, int status)
1209 {
1210     /*
1211      * We need do nothing here: the OS X `application is busy'
1212      * beachball pointer appears _automatically_ when the
1213      * application isn't responding to GUI messages.
1214      */
1215 }