dlls/kernel32/editline.c

   1 /*
   2  * line edition function for Win32 console
   3  *
   4  * Copyright 2001 Eric Pouech
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <stdarg.h>
  25 #include <string.h>
  26
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "wincon.h"
  30 #include "wine/unicode.h"
  31 #include "winnls.h"
  32 #include "wine/debug.h"
  33 #include "console_private.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(console);
  36
  37 struct WCEL_Context;
  38
  39 typedef struct
  40 {
  41     WCHAR                       val;            /* vk or unicode char */
  42     void                        (*func)(struct WCEL_Context* ctx);
  43 } KeyEntry;
  44
  45 typedef struct
  46 {
  47     DWORD                       keyState;       /* keyState (from INPUT_RECORD) to match */
  48     BOOL                        chkChar;        /* check vk or char */
  49     const KeyEntry*             entries;        /* array of entries */
  50 } KeyMap;
  51
  52 typedef struct WCEL_Context {
  53     WCHAR*                      line;           /* the line being edited */
  54     size_t                      alloc;          /* number of WCHAR in line */
  55     unsigned                    len;            /* number of chars in line */
  56     unsigned                    ofs;            /* offset for cursor in current line */
  57     WCHAR*                      yanked;         /* yanked line */
  58     unsigned                    mark;           /* marked point (emacs mode only) */
  59     CONSOLE_SCREEN_BUFFER_INFO  csbi;           /* current state (initial cursor, window size, attribute) */
  60     HANDLE                      hConIn;
  61     HANDLE                      hConOut;
  62     unsigned                    done : 1,       /* to 1 when we're done with editing */
  63                                 error : 1,      /* to 1 when an error occurred in the editing */
  64                                 can_wrap : 1;   /* to 1 when multi-line edition can take place */
  65     unsigned                    histSize;
  66     unsigned                    histPos;
  67     WCHAR*                      histCurr;
  68 } WCEL_Context;
  69
  70 #if 0
  71 static void WCEL_Dump(WCEL_Context* ctx, const char* pfx)
  72 {
  73     MESSAGE("%s: [line=%s[alloc=%u] ofs=%u len=%u start=(%d,%d) mask=%c%c%c]\n"
  74             "\t\thist=(size=%u pos=%u curr=%s)\n"
  75             "\t\tyanked=%s\n",
  76             pfx, debugstr_w(ctx->line), ctx->alloc, ctx->ofs, ctx->len,
  77             ctx->csbi.dwCursorPosition.X, ctx->csbi.dwCursorPosition.Y,
  78             ctx->done ? 'D' : 'd', ctx->error ? 'E' : 'e', ctx->can_wrap ? 'W' : 'w',
  79             ctx->histSize, ctx->histPos, debugstr_w(ctx->histCurr),
  80             debugstr_w(ctx->yanked));
  81 }
  82 #endif
  83
  84 /* ====================================================================
  85  *
  86  * Console helper functions
  87  *
  88  * ====================================================================*/
  89
  90 static BOOL WCEL_Get(WCEL_Context* ctx, INPUT_RECORD* ir)
  91 {
  92     if (ReadConsoleInputW(ctx->hConIn, ir, 1, NULL)) return TRUE;
  93     ERR("hmm bad situation\n");
  94     ctx->error = 1;
  95     return FALSE;
  96 }
  97
  98 static inline void WCEL_Beep(WCEL_Context* ctx)
  99 {
 100     Beep(400, 300);
 101 }
 102
 103 static inline BOOL WCEL_IsSingleLine(WCEL_Context* ctx, size_t len)
 104 {
 105     return ctx->csbi.dwCursorPosition.X + ctx->len + len <= ctx->csbi.dwSize.X;
 106 }
 107
 108 static inline COORD WCEL_GetCoord(WCEL_Context* ctx, int ofs)
 109 {
 110     COORD       c;
 111     int         len = ctx->csbi.dwSize.X - ctx->csbi.dwCursorPosition.X;
 112
 113     c.Y = ctx->csbi.dwCursorPosition.Y;
 114     if (ofs >= len)
 115     {
 116         ofs -= len;
 117         c.X = ofs % ctx->csbi.dwSize.X;
 118         c.Y += 1 + ofs / ctx->csbi.dwSize.X;
 119     }
 120     else c.X = ctx->csbi.dwCursorPosition.X + ofs;
 121     return c;
 122 }
 123
 124 static inline void WCEL_Update(WCEL_Context* ctx, int beg, int len)
 125 {
 126     WriteConsoleOutputCharacterW(ctx->hConOut, &ctx->line[beg], len,
 127                                  WCEL_GetCoord(ctx, beg), NULL);
 128     FillConsoleOutputAttribute(ctx->hConOut, ctx->csbi.wAttributes, len,
 129                                WCEL_GetCoord(ctx, beg), NULL);
 130 }
 131
 132 /* ====================================================================
 133  *
 134  * context manipulation functions
 135  *
 136  * ====================================================================*/
 137
 138 static BOOL WCEL_Grow(WCEL_Context* ctx, size_t len)
 139 {
 140     if (!WCEL_IsSingleLine(ctx, len) && !ctx->can_wrap)
 141     {
 142         FIXME("Mode doesn't allow to wrap. However, we should allow to overwrite current string\n");
 143         return FALSE;
 144     }
 145
 146     if (ctx->len + len >= ctx->alloc)
 147     {
 148         WCHAR*  newline;
 149         size_t  newsize;
 150
 151         /* round up size to 32 byte-WCHAR boundary */
 152         newsize = (ctx->len + len + 1 + 31) & ~31;
 153
 154         if (ctx->line)
 155             newline = HeapReAlloc(GetProcessHeap(), 0, ctx->line, sizeof(WCHAR) * newsize);
 156         else
 157             newline = HeapAlloc(GetProcessHeap(), 0, sizeof(WCHAR) * newsize);
 158
 159         if (!newline) return FALSE;
 160         ctx->line = newline;
 161         ctx->alloc = newsize;
 162     }
 163     return TRUE;
 164 }
 165
 166 static void WCEL_DeleteString(WCEL_Context* ctx, int beg, int end)
 167 {
 168     unsigned    str_len = end - beg;
 169     COORD       cbeg = WCEL_GetCoord(ctx, ctx->len - str_len);
 170     COORD       cend = WCEL_GetCoord(ctx, ctx->len);
 171     CHAR_INFO   ci;
 172
 173     if (end < ctx->len)
 174         memmove(&ctx->line[beg], &ctx->line[end], (ctx->len - end) * sizeof(WCHAR));
 175     /* we need to clean from ctx->len - str_len to ctx->len */
 176
 177     ci.Char.UnicodeChar = ' ';
 178     ci.Attributes = ctx->csbi.wAttributes;
 179
 180     if (cbeg.Y == cend.Y)
 181     {
 182         /* partial erase of sole line */
 183         CONSOLE_FillLineUniform(ctx->hConOut, cbeg.X, cbeg.Y,
 184                                 cend.X - cbeg.X, &ci);
 185     }
 186     else
 187     {
 188         int         i;
 189         /* erase til eol on first line */
 190         CONSOLE_FillLineUniform(ctx->hConOut, cbeg.X, cbeg.Y,
 191                                 ctx->csbi.dwSize.X - cbeg.X, &ci);
 192         /* completely erase all the others (full lines) */
 193         for (i = cbeg.Y + 1; i < cend.Y; i++)
 194             CONSOLE_FillLineUniform(ctx->hConOut, 0, i, ctx->csbi.dwSize.X, &ci);
 195         /* erase from beginning of line until last pos on last line */
 196         CONSOLE_FillLineUniform(ctx->hConOut, 0, cend.Y, cend.X, &ci);
 197     }
 198     ctx->len -= str_len;
 199     WCEL_Update(ctx, 0, ctx->len);
 200     ctx->line[ctx->len] = 0;
 201 }
 202
 203 static void WCEL_InsertString(WCEL_Context* ctx, const WCHAR* str)
 204 {
 205     size_t      len = lstrlenW(str);
 206
 207     if (!len || !WCEL_Grow(ctx, len)) return;
 208     if (ctx->len > ctx->ofs)
 209         memmove(&ctx->line[ctx->ofs + len], &ctx->line[ctx->ofs], (ctx->len - ctx->ofs) * sizeof(WCHAR));
 210     memcpy(&ctx->line[ctx->ofs], str, len * sizeof(WCHAR));
 211     ctx->len += len;
 212     ctx->line[ctx->len] = 0;
 213     WCEL_Update(ctx, ctx->ofs, ctx->len - ctx->ofs);
 214
 215     ctx->ofs += len;
 216 }
 217
 218 static void WCEL_InsertChar(WCEL_Context* ctx, WCHAR c)
 219 {
 220     WCHAR       buffer[2];
 221
 222     /* do not insert 0..31 control characters */
 223     if (c < ' ' && c != '\t') return;
 224
 225     buffer[0] = c;
 226     buffer[1] = 0;
 227     WCEL_InsertString(ctx, buffer);
 228 }
 229
 230 static void WCEL_FreeYank(WCEL_Context* ctx)
 231 {
 232     HeapFree(GetProcessHeap(), 0, ctx->yanked);
 233     ctx->yanked = NULL;
 234 }
 235
 236 static void WCEL_SaveYank(WCEL_Context* ctx, int beg, int end)
 237 {
 238     int len = end - beg;
 239     if (len <= 0) return;
 240
 241     WCEL_FreeYank(ctx);
 242     /* After WCEL_FreeYank ctx->yanked is empty */
 243     ctx->yanked = HeapAlloc(GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR));
 244     if (!ctx->yanked) return;
 245     memcpy(ctx->yanked, &ctx->line[beg], len * sizeof(WCHAR));
 246     ctx->yanked[len] = 0;
 247 }
 248
 249 /* FIXME NTDLL doesn't export iswalnum, and I don't want to link in msvcrt when most
 250  * of the data lay in unicode lib
 251  */
 252 static inline BOOL WCEL_iswalnum(WCHAR wc)
 253 {
 254     return get_char_typeW(wc) & (C1_ALPHA|C1_DIGIT|C1_LOWER|C1_UPPER);
 255 }
 256
 257 static int WCEL_GetLeftWordTransition(WCEL_Context* ctx, int ofs)
 258 {
 259     ofs--;
 260     while (ofs >= 0 && !WCEL_iswalnum(ctx->line[ofs])) ofs--;
 261     while (ofs >= 0 && WCEL_iswalnum(ctx->line[ofs])) ofs--;
 262     if (ofs >= 0) ofs++;
 263     return max(ofs, 0);
 264 }
 265
 266 static int WCEL_GetRightWordTransition(WCEL_Context* ctx, int ofs)
 267 {
 268     ofs++;
 269     while (ofs <= ctx->len && WCEL_iswalnum(ctx->line[ofs])) ofs++;
 270     while (ofs <= ctx->len && !WCEL_iswalnum(ctx->line[ofs])) ofs++;
 271     return min(ofs, ctx->len);
 272 }
 273
 274 static WCHAR* WCEL_GetHistory(WCEL_Context* ctx, int idx)
 275 {
 276     WCHAR*      ptr;
 277
 278     if (idx == ctx->histSize - 1)
 279     {
 280         ptr = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(ctx->histCurr) + 1) * sizeof(WCHAR));
 281         lstrcpyW(ptr, ctx->histCurr);
 282     }
 283     else
 284     {
 285         int     len = CONSOLE_GetHistory(idx, NULL, 0);
 286
 287         if ((ptr = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR))))
 288         {
 289             CONSOLE_GetHistory(idx, ptr, len);
 290         }
 291     }
 292     return ptr;
 293 }
 294
 295 static void     WCEL_HistoryInit(WCEL_Context* ctx)
 296 {
 297     ctx->histPos  = CONSOLE_GetNumHistoryEntries();
 298     ctx->histSize = ctx->histPos + 1;
 299     ctx->histCurr = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WCHAR));
 300 }
 301
 302 static void    WCEL_MoveToHist(WCEL_Context* ctx, int idx)
 303 {
 304     WCHAR*      data = WCEL_GetHistory(ctx, idx);
 305     int         len = lstrlenW(data) + 1;
 306
 307     /* save current line edition for recall when needed (FIXME seems broken to me) */
 308     if (ctx->histPos == ctx->histSize - 1)
 309     {
 310         HeapFree(GetProcessHeap(), 0, ctx->histCurr);
 311         ctx->histCurr = HeapAlloc(GetProcessHeap(), 0, (ctx->len + 1) * sizeof(WCHAR));
 312         memcpy(ctx->histCurr, ctx->line, (ctx->len + 1) * sizeof(WCHAR));
 313     }
 314     /* need to clean also the screen if new string is shorter than old one */
 315     WCEL_DeleteString(ctx, 0, ctx->len);
 316     ctx->ofs = 0;
 317     /* insert new string */
 318     if (WCEL_Grow(ctx, len))
 319     {
 320         WCEL_InsertString(ctx, data);
 321         HeapFree(GetProcessHeap(), 0, data);
 322         ctx->histPos = idx;
 323     }
 324 }
 325
 326 static void    WCEL_FindPrevInHist(WCEL_Context* ctx)
 327 {
 328     int startPos = ctx->histPos;
 329     WCHAR*      data;
 330     unsigned int    len, oldofs;
 331
 332     if (ctx->histPos && ctx->histPos == ctx->histSize) {
 333         startPos--;
 334         ctx->histPos--;
 335     }
 336
 337     do {
 338        data = WCEL_GetHistory(ctx, ctx->histPos);
 339
 340        if (ctx->histPos) ctx->histPos--;
 341        else ctx->histPos = (ctx->histSize-1);
 342
 343        len = lstrlenW(data) + 1;
 344        if ((len >= ctx->ofs) &&
 345            (memcmp(ctx->line, data, ctx->ofs * sizeof(WCHAR)) == 0)) {
 346
 347            /* need to clean also the screen if new string is shorter than old one */
 348            WCEL_DeleteString(ctx, 0, ctx->len);
 349
 350            if (WCEL_Grow(ctx, len))
 351            {
 352               oldofs = ctx->ofs;
 353               ctx->ofs = 0;
 354               WCEL_InsertString(ctx, data);
 355               ctx->ofs = oldofs;
 356               SetConsoleCursorPosition(ctx->hConOut, WCEL_GetCoord(ctx, ctx->ofs));
 357               HeapFree(GetProcessHeap(), 0, data);
 358               return;
 359            }
 360        }
 361     } while (ctx->histPos != startPos);
 362
 363     return;
 364 }
 365
 366 /* ====================================================================
 367  *
 368  * basic edition functions
 369  *
 370  * ====================================================================*/
 371
 372 static void WCEL_Done(WCEL_Context* ctx)
 373 {
 374     WCHAR       nl = '\n';
 375     if (!WCEL_Grow(ctx, 2)) return;
 376     ctx->line[ctx->len++] = '\r';
 377     ctx->line[ctx->len++] = '\n';
 378     ctx->line[ctx->len] = 0;
 379     WriteConsoleW(ctx->hConOut, &nl, 1, NULL, NULL);
 380     ctx->done = 1;
 381 }
 382
 383 static void WCEL_MoveLeft(WCEL_Context* ctx)
 384 {
 385     if (ctx->ofs > 0) ctx->ofs--;
 386 }
 387
 388 static void WCEL_MoveRight(WCEL_Context* ctx)
 389 {
 390     if (ctx->ofs < ctx->len) ctx->ofs++;
 391 }
 392
 393 static void WCEL_MoveToLeftWord(WCEL_Context* ctx)
 394 {
 395     unsigned int        new_ofs = WCEL_GetLeftWordTransition(ctx, ctx->ofs);
 396     if (new_ofs != ctx->ofs) ctx->ofs = new_ofs;
 397 }
 398
 399 static void WCEL_MoveToRightWord(WCEL_Context* ctx)
 400 {
 401     unsigned int        new_ofs = WCEL_GetRightWordTransition(ctx, ctx->ofs);
 402     if (new_ofs != ctx->ofs) ctx->ofs = new_ofs;
 403 }
 404
 405 static void WCEL_MoveToBeg(WCEL_Context* ctx)
 406 {
 407     ctx->ofs = 0;
 408 }
 409
 410 static void WCEL_MoveToEnd(WCEL_Context* ctx)
 411 {
 412     ctx->ofs = ctx->len;
 413 }
 414
 415 static void WCEL_SetMark(WCEL_Context* ctx)
 416 {
 417     ctx->mark = ctx->ofs;
 418 }
 419
 420 static void WCEL_ExchangeMark(WCEL_Context* ctx)
 421 {
 422     unsigned tmp;
 423
 424     if (ctx->mark > ctx->len) return;
 425     tmp = ctx->ofs;
 426     ctx->ofs = ctx->mark;
 427     ctx->mark = tmp;
 428 }
 429
 430 static void WCEL_CopyMarkedZone(WCEL_Context* ctx)
 431 {
 432     unsigned beg, end;
 433
 434     if (ctx->mark > ctx->len || ctx->mark == ctx->ofs) return;
 435     if (ctx->mark > ctx->ofs)
 436     {
 437         beg = ctx->ofs;         end = ctx->mark;
 438     }
 439     else
 440     {
 441         beg = ctx->mark;        end = ctx->ofs;
 442     }
 443     WCEL_SaveYank(ctx, beg, end);
 444 }
 445
 446 static void WCEL_TransposeChar(WCEL_Context* ctx)
 447 {
 448     WCHAR       c;
 449
 450     if (!ctx->ofs || ctx->ofs == ctx->len) return;
 451
 452     c = ctx->line[ctx->ofs];
 453     ctx->line[ctx->ofs] = ctx->line[ctx->ofs - 1];
 454     ctx->line[ctx->ofs - 1] = c;
 455
 456     WCEL_Update(ctx, ctx->ofs - 1, 2);
 457     ctx->ofs++;
 458 }
 459
 460 static void WCEL_TransposeWords(WCEL_Context* ctx)
 461 {
 462     unsigned int        left_ofs = WCEL_GetLeftWordTransition(ctx, ctx->ofs),
 463         right_ofs = WCEL_GetRightWordTransition(ctx, ctx->ofs);
 464     if (left_ofs < ctx->ofs && right_ofs > ctx->ofs)
 465     {
 466         unsigned len_r = right_ofs - ctx->ofs;
 467         unsigned len_l = ctx->ofs - left_ofs;
 468
 469         char*   tmp = HeapAlloc(GetProcessHeap(), 0, len_r * sizeof(WCHAR));
 470         if (!tmp) return;
 471
 472         memcpy(tmp, &ctx->line[ctx->ofs], len_r * sizeof(WCHAR));
 473         memmove(&ctx->line[left_ofs + len_r], &ctx->line[left_ofs], len_l * sizeof(WCHAR));
 474         memcpy(&ctx->line[left_ofs], tmp, len_r * sizeof(WCHAR));
 475
 476         HeapFree(GetProcessHeap(), 0, tmp);
 477         WCEL_Update(ctx, left_ofs, len_l + len_r);
 478         ctx->ofs = right_ofs;
 479     }
 480 }
 481
 482 static void WCEL_LowerCaseWord(WCEL_Context* ctx)
 483 {
 484     unsigned int        new_ofs = WCEL_GetRightWordTransition(ctx, ctx->ofs);
 485     if (new_ofs != ctx->ofs)
 486     {
 487         unsigned int    i;
 488         for (i = ctx->ofs; i <= new_ofs; i++)
 489             ctx->line[i] = tolowerW(ctx->line[i]);
 490         WCEL_Update(ctx, ctx->ofs, new_ofs - ctx->ofs + 1);
 491         ctx->ofs = new_ofs;
 492     }
 493 }
 494
 495 static void WCEL_UpperCaseWord(WCEL_Context* ctx)
 496 {
 497     unsigned int        new_ofs = WCEL_GetRightWordTransition(ctx, ctx->ofs);
 498     if (new_ofs != ctx->ofs)
 499     {
 500         unsigned int    i;
 501         for (i = ctx->ofs; i <= new_ofs; i++)
 502             ctx->line[i] = toupperW(ctx->line[i]);
 503         WCEL_Update(ctx, ctx->ofs, new_ofs - ctx->ofs + 1);
 504         ctx->ofs = new_ofs;
 505     }
 506 }
 507
 508 static void WCEL_CapitalizeWord(WCEL_Context* ctx)
 509 {
 510     unsigned int        new_ofs = WCEL_GetRightWordTransition(ctx, ctx->ofs);
 511     if (new_ofs != ctx->ofs)
 512     {
 513         unsigned int    i;
 514
 515         ctx->line[ctx->ofs] = toupperW(ctx->line[ctx->ofs]);
 516         for (i = ctx->ofs + 1; i <= new_ofs; i++)
 517             ctx->line[i] = tolowerW(ctx->line[i]);
 518         WCEL_Update(ctx, ctx->ofs, new_ofs - ctx->ofs + 1);
 519         ctx->ofs = new_ofs;
 520     }
 521 }
 522
 523 static void WCEL_Yank(WCEL_Context* ctx)
 524 {
 525     WCEL_InsertString(ctx, ctx->yanked);
 526 }
 527
 528 static void WCEL_KillToEndOfLine(WCEL_Context* ctx)
 529 {
 530     WCEL_SaveYank(ctx, ctx->ofs, ctx->len);
 531     WCEL_DeleteString(ctx, ctx->ofs, ctx->len);
 532 }
 533
 534 static void WCEL_KillMarkedZone(WCEL_Context* ctx)
 535 {
 536     unsigned beg, end;
 537
 538     if (ctx->mark > ctx->len || ctx->mark == ctx->ofs) return;
 539     if (ctx->mark > ctx->ofs)
 540     {
 541         beg = ctx->ofs;         end = ctx->mark;
 542     }
 543     else
 544     {
 545         beg = ctx->mark;        end = ctx->ofs;
 546     }
 547     WCEL_SaveYank(ctx, beg, end);
 548     WCEL_DeleteString(ctx, beg, end);
 549     ctx->ofs = beg;
 550 }
 551
 552 static void WCEL_DeletePrevChar(WCEL_Context* ctx)
 553 {
 554     if (ctx->ofs)
 555     {
 556         WCEL_DeleteString(ctx, ctx->ofs - 1, ctx->ofs);
 557         ctx->ofs--;
 558     }
 559 }
 560
 561 static void WCEL_DeleteCurrChar(WCEL_Context* ctx)
 562 {
 563     if (ctx->ofs < ctx->len)
 564         WCEL_DeleteString(ctx, ctx->ofs, ctx->ofs + 1);
 565 }
 566
 567 static void WCEL_DeleteLeftWord(WCEL_Context* ctx)
 568 {
 569     unsigned int        new_ofs = WCEL_GetLeftWordTransition(ctx, ctx->ofs);
 570     if (new_ofs != ctx->ofs)
 571     {
 572         WCEL_DeleteString(ctx, new_ofs, ctx->ofs);
 573         ctx->ofs = new_ofs;
 574     }
 575 }
 576
 577 static void WCEL_DeleteRightWord(WCEL_Context* ctx)
 578 {
 579     unsigned int        new_ofs = WCEL_GetRightWordTransition(ctx, ctx->ofs);
 580     if (new_ofs != ctx->ofs)
 581     {
 582         WCEL_DeleteString(ctx, ctx->ofs, new_ofs);
 583     }
 584 }
 585
 586 static void WCEL_MoveToPrevHist(WCEL_Context* ctx)
 587 {
 588     if (ctx->histPos) WCEL_MoveToHist(ctx, ctx->histPos - 1);
 589 }
 590
 591 static void WCEL_MoveToNextHist(WCEL_Context* ctx)
 592 {
 593     if (ctx->histPos < ctx->histSize - 1) WCEL_MoveToHist(ctx, ctx->histPos + 1);
 594 }
 595
 596 static void WCEL_MoveToFirstHist(WCEL_Context* ctx)
 597 {
 598     if (ctx->histPos != 0) WCEL_MoveToHist(ctx, 0);
 599 }
 600
 601 static void WCEL_MoveToLastHist(WCEL_Context* ctx)
 602 {
 603     if (ctx->histPos != ctx->histSize - 1) WCEL_MoveToHist(ctx, ctx->histSize - 1);
 604 }
 605
 606 static void WCEL_Redraw(WCEL_Context* ctx)
 607 {
 608     COORD       c = WCEL_GetCoord(ctx, ctx->len);
 609     CHAR_INFO   ci;
 610
 611     WCEL_Update(ctx, 0, ctx->len);
 612
 613     ci.Char.UnicodeChar = ' ';
 614     ci.Attributes = ctx->csbi.wAttributes;
 615
 616     CONSOLE_FillLineUniform(ctx->hConOut, c.X, c.Y, ctx->csbi.dwSize.X - c.X, &ci);
 617 }
 618
 619 static void WCEL_RepeatCount(WCEL_Context* ctx)
 620 {
 621 #if 0
 622 /* FIXME: wait until all console code is in kernel32 */
 623     INPUT_RECORD        ir;
 624     unsigned            repeat = 0;
 625
 626     while (WCEL_Get(ctx, &ir, FALSE))
 627     {
 628         if (ir.EventType != KEY_EVENT) break;
 629         if (ir.Event.KeyEvent.bKeyDown)
 630         {
 631             if ((ir.Event.KeyEvent.dwControlKeyState & ~(NUMLOCK_ON|SCROLLLOCK_ON|CAPSLOCK_ON)) != 0)
 632                 break;
 633             if (ir.Event.KeyEvent.uChar.UnicodeChar < '0' ||
 634                 ir.Event.KeyEvent.uChar.UnicodeChar > '9')
 635                 break;
 636             repeat = repeat * 10 + ir.Event.KeyEvent.uChar.UnicodeChar - '0';
 637         }
 638         WCEL_Get(ctx, &ir, TRUE);
 639     }
 640     FIXME("=> %u\n", repeat);
 641 #endif
 642 }
 643
 644 /* ====================================================================
 645  *
 646  *              Key Maps
 647  *
 648  * ====================================================================*/
 649
 650 #define CTRL(x) ((x) - '@')
 651 static const KeyEntry StdKeyMap[] =
 652 {
 653     {/*BACK*/0x08,      WCEL_DeletePrevChar     },
 654     {/*RETURN*/0x0d,    WCEL_Done               },
 655     {/*DEL*/127,        WCEL_DeleteCurrChar     },
 656     {   0,              NULL                    }
 657 };
 658
 659 static const KeyEntry EmacsKeyMapCtrl[] =
 660 {
 661     {   CTRL('@'),      WCEL_SetMark            },
 662     {   CTRL('A'),      WCEL_MoveToBeg          },
 663     {   CTRL('B'),      WCEL_MoveLeft           },
 664     /* C: done in server */
 665     {   CTRL('D'),      WCEL_DeleteCurrChar     },
 666     {   CTRL('E'),      WCEL_MoveToEnd          },
 667     {   CTRL('F'),      WCEL_MoveRight          },
 668     {   CTRL('G'),      WCEL_Beep               },
 669     {   CTRL('H'),      WCEL_DeletePrevChar     },
 670     /* I: meaningless (or tab ???) */
 671     {   CTRL('J'),      WCEL_Done               },
 672     {   CTRL('K'),      WCEL_KillToEndOfLine    },
 673     {   CTRL('L'),      WCEL_Redraw             },
 674     {   CTRL('M'),      WCEL_Done               },
 675     {   CTRL('N'),      WCEL_MoveToNextHist     },
 676     /* O; insert line... meaningless */
 677     {   CTRL('P'),      WCEL_MoveToPrevHist     },
 678     /* Q: [NIY] quoting... */
 679     /* R: [NIY] search backwards... */
 680     /* S: [NIY] search forwards... */
 681     {   CTRL('T'),      WCEL_TransposeChar      },
 682     {   CTRL('U'),      WCEL_RepeatCount        },
 683     /* V: paragraph down... meaningless */
 684     {   CTRL('W'),      WCEL_KillMarkedZone     },
 685     {   CTRL('X'),      WCEL_ExchangeMark       },
 686     {   CTRL('Y'),      WCEL_Yank               },
 687     /* Z: meaningless */
 688     {   0,              NULL                    }
 689 };
 690
 691 static const KeyEntry EmacsKeyMapAlt[] =
 692 {
 693     {/*DEL*/127,        WCEL_DeleteLeftWord     },
 694     {   '<',            WCEL_MoveToFirstHist    },
 695     {   '>',            WCEL_MoveToLastHist     },
 696     {   '?',            WCEL_Beep               },
 697     {   'b',            WCEL_MoveToLeftWord     },
 698     {   'c',            WCEL_CapitalizeWord     },
 699     {   'd',            WCEL_DeleteRightWord    },
 700     {   'f',            WCEL_MoveToRightWord    },
 701     {   'l',            WCEL_LowerCaseWord      },
 702     {   't',            WCEL_TransposeWords     },
 703     {   'u',            WCEL_UpperCaseWord      },
 704     {   'w',            WCEL_CopyMarkedZone     },
 705     {   0,              NULL                    }
 706 };
 707
 708 static const KeyEntry EmacsStdKeyMap[] =
 709 {
 710     {/*VK_PRIOR*/0x21,  WCEL_MoveToPrevHist     },
 711     {/*VK_NEXT*/ 0x22,  WCEL_MoveToNextHist     },
 712     {/*VK_END*/  0x23,  WCEL_MoveToEnd          },
 713     {/*VK_HOME*/ 0x24,  WCEL_MoveToBeg          },
 714     {/*VK_RIGHT*/0x27,  WCEL_MoveRight          },
 715     {/*VK_LEFT*/ 0x25,  WCEL_MoveLeft           },
 716     {/*VK_DEL*/  0x2e,  WCEL_DeleteCurrChar     },
 717     {   0,              NULL                    }
 718 };
 719
 720 static const KeyMap EmacsKeyMap[] =
 721 {
 722     {0,                  1, StdKeyMap},
 723     {0,                  0, EmacsStdKeyMap},
 724     {RIGHT_ALT_PRESSED,  1, EmacsKeyMapAlt},    /* right alt  */
 725     {LEFT_ALT_PRESSED,   1, EmacsKeyMapAlt},    /* left  alt  */
 726     {RIGHT_CTRL_PRESSED, 1, EmacsKeyMapCtrl},   /* right ctrl */
 727     {LEFT_CTRL_PRESSED,  1, EmacsKeyMapCtrl},   /* left  ctrl */
 728     {0,                  0, NULL}
 729 };
 730
 731 static const KeyEntry Win32StdKeyMap[] =
 732 {
 733     {/*VK_LEFT*/ 0x25,  WCEL_MoveLeft           },
 734     {/*VK_RIGHT*/0x27,  WCEL_MoveRight          },
 735     {/*VK_HOME*/ 0x24,  WCEL_MoveToBeg          },
 736     {/*VK_END*/  0x23,  WCEL_MoveToEnd          },
 737     {/*VK_UP*/   0x26,  WCEL_MoveToPrevHist     },
 738     {/*VK_DOWN*/ 0x28,  WCEL_MoveToNextHist     },
 739     {/*VK_DEL*/  0x2e,  WCEL_DeleteCurrChar     },
 740     {/*VK_F8*/   0x77,  WCEL_FindPrevInHist     },
 741     {   0,              NULL                    }
 742 };
 743
 744 static const KeyEntry Win32KeyMapCtrl[] =
 745 {
 746     {/*VK_LEFT*/ 0x25,  WCEL_MoveToLeftWord     },
 747     {/*VK_RIGHT*/0x27,  WCEL_MoveToRightWord    },
 748     {/*VK_END*/  0x23,  WCEL_KillToEndOfLine    },
 749     {   0,              NULL                    }
 750 };
 751
 752 static const KeyMap Win32KeyMap[] =
 753 {
 754     {0,                  1, StdKeyMap},
 755     {0,                  0, Win32StdKeyMap},
 756     {RIGHT_CTRL_PRESSED, 0, Win32KeyMapCtrl},
 757     {LEFT_CTRL_PRESSED,  0, Win32KeyMapCtrl},
 758     {0,                  0, NULL}
 759 };
 760 #undef CTRL
 761
 762 /* ====================================================================
 763  *
 764  *              Read line master function
 765  *
 766  * ====================================================================*/
 767
 768 WCHAR* CONSOLE_Readline(HANDLE hConsoleIn)
 769 {
 770     WCEL_Context        ctx;
 771     INPUT_RECORD        ir;
 772     const KeyMap*       km;
 773     const KeyEntry*     ke;
 774     unsigned            ofs;
 775     void                (*func)(struct WCEL_Context* ctx);
 776     DWORD               ks;
 777     int                 use_emacs;
 778
 779     memset(&ctx, 0, sizeof(ctx));
 780     ctx.hConIn = hConsoleIn;
 781     WCEL_HistoryInit(&ctx);
 782
 783     if (!CONSOLE_GetEditionMode(hConsoleIn, &use_emacs))
 784         use_emacs = 0;
 785
 786     if ((ctx.hConOut = CreateFileA("CONOUT$", GENERIC_READ|GENERIC_WRITE, 0, NULL,
 787                                     OPEN_EXISTING, 0, 0 )) == INVALID_HANDLE_VALUE ||
 788         !GetConsoleScreenBufferInfo(ctx.hConOut, &ctx.csbi))
 789         return NULL;
 790     ctx.can_wrap = (GetConsoleMode(ctx.hConOut, &ks) && (ks & ENABLE_WRAP_AT_EOL_OUTPUT)) ? 1 : 0;
 791
 792     if (!WCEL_Grow(&ctx, 1))
 793     {
 794         CloseHandle(ctx.hConOut);
 795         return NULL;
 796     }
 797     ctx.line[0] = 0;
 798
 799 /* EPP     WCEL_Dump(&ctx, "init"); */
 800
 801     while (!ctx.done && !ctx.error && WCEL_Get(&ctx, &ir))
 802     {
 803         if (ir.EventType != KEY_EVENT) continue;
 804         TRACE("key%s repeatCount=%u, keyCode=%02x scanCode=%02x char=%02x keyState=%08x\n",
 805               ir.Event.KeyEvent.bKeyDown ? "Down" : "Up  ", ir.Event.KeyEvent.wRepeatCount,
 806               ir.Event.KeyEvent.wVirtualKeyCode, ir.Event.KeyEvent.wVirtualScanCode,
 807               ir.Event.KeyEvent.uChar.UnicodeChar, ir.Event.KeyEvent.dwControlKeyState);
 808         if (!ir.Event.KeyEvent.bKeyDown) continue;
 809
 810 /* EPP          WCEL_Dump(&ctx, "before func"); */
 811         ofs = ctx.ofs;
 812         /* mask out some bits which don't interest us */
 813         ks = ir.Event.KeyEvent.dwControlKeyState & ~(NUMLOCK_ON|SCROLLLOCK_ON|CAPSLOCK_ON|ENHANCED_KEY);
 814
 815         func = NULL;
 816         for (km = (use_emacs) ? EmacsKeyMap : Win32KeyMap; km->entries != NULL; km++)
 817         {
 818             if (km->keyState != ks)
 819                 continue;
 820             if (km->chkChar)
 821             {
 822                 for (ke = &km->entries[0]; ke->func != 0; ke++)
 823                     if (ke->val == ir.Event.KeyEvent.uChar.UnicodeChar) break;
 824             }
 825             else
 826             {
 827                 for (ke = &km->entries[0]; ke->func != 0; ke++)
 828                     if (ke->val == ir.Event.KeyEvent.wVirtualKeyCode) break;
 829
 830             }
 831             if (ke->func)
 832             {
 833                 func = ke->func;
 834                 break;
 835             }
 836         }
 837
 838         if (func)
 839             (func)(&ctx);
 840         else if (!(ir.Event.KeyEvent.dwControlKeyState & LEFT_ALT_PRESSED))
 841             WCEL_InsertChar(&ctx, ir.Event.KeyEvent.uChar.UnicodeChar);
 842         else TRACE("Dropped event\n");
 843
 844 /* EPP         WCEL_Dump(&ctx, "after func"); */
 845         if (ctx.ofs != ofs)
 846             SetConsoleCursorPosition(ctx.hConOut, WCEL_GetCoord(&ctx, ctx.ofs));
 847     }
 848     if (ctx.error)
 849     {
 850         HeapFree(GetProcessHeap(), 0, ctx.line);
 851         ctx.line = NULL;
 852     }
 853     WCEL_FreeYank(&ctx);
 854     if (ctx.line)
 855         CONSOLE_AppendHistory(ctx.line);
 856
 857     CloseHandle(ctx.hConOut);
 858     HeapFree(GetProcessHeap(), 0, ctx.histCurr);
 859     return ctx.line;
 860 }