dlls/riched20/editor.c

   1 /*
   2  * RichEdit - functions dealing with editor object
   3  *
   4  * Copyright 2004 by Krzysztof Foltman
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 /*
  22   API implementation status:
  23
  24   Messages (ANSI versions not done yet)
  25   - EM_AUTOURLDETECT 2.0
  26   - EM_CANPASTE
  27   + EM_CANREDO 2.0
  28   + EM_CANUNDO
  29   - EM_CHARFROMPOS
  30   - EM_DISPLAYBAND
  31   + EM_EMPTYUNDOBUFFER
  32   + EM_EXGETSEL
  33   - EM_EXLIMITTEXT
  34   - EM_EXLINEFROMCHAR
  35   + EM_EXSETSEL
  36   - EM_FINDTEXT
  37   - EM_FINDTEXTEX
  38   - EM_FINDWORDBREAK
  39   - EM_FMTLINES
  40   - EM_FORMATRANGE
  41   - EM_GETCHARFORMAT (partly done)
  42   + EM_GETEVENTMASK
  43   - EM_GETFIRSTVISIBLELINE
  44   - EM_GETIMECOLOR 1.0asian
  45   - EM_GETIMECOMPMODE 2.0
  46   - EM_GETIMEOPTIONS 1.0asian
  47   - EM_GETIMESTATUS
  48   - EM_GETLANGOPTIONS 2.0
  49   - EM_GETLIMITTEXT
  50   - EM_GETLINE
  51   - EM_GETLINECOUNT   returns number of rows, not of paragraphs
  52   + EM_GETMODIFY
  53   - EM_GETOLEINTERFACE
  54   - EM_GETOPTIONS
  55   + EM_GETPARAFORMAT
  56   - EM_GETPUNCTUATION 1.0asian
  57   - EM_GETRECT
  58   - EM_GETREDONAME 2.0
  59   + EM_GETSEL
  60   + EM_GETSELTEXT (ANSI&Unicode)
  61 ! - EM_GETTHUMB
  62   - EM_GETTEXTMODE 2.0
  63 ? + EM_GETTEXTRANGE (ANSI&Unicode)
  64   - EM_GETUNDONAME
  65   - EM_GETWORDBREAKPROC
  66   - EM_GETWORDBREAKPROCEX
  67   - EM_GETWORDWRAPMODE 1.0asian
  68   - EM_HIDESELECTION
  69   - EM_LIMITTEXT
  70   - EM_LINEFROMCHAR
  71   - EM_LINEINDEX
  72   - EM_LINELENGTH
  73   - EM_LINESCROLL
  74   - EM_PASTESPECIAL
  75   - EM_POSFROMCHARS
  76   - EM_REDO 2.0
  77   - EM_REQUESTRESIZE
  78   + EM_REPLACESEL (proper style?) ANSI&Unicode
  79   - EM_SCROLL
  80   - EM_SCROLLCARET
  81   - EM_SELECTIONTYPE
  82   + EM_SETBKGNDCOLOR
  83   - EM_SETCHARFORMAT (partly done, no ANSI)
  84   + EM_SETEVENTMASK (few notifications supported)
  85   - EM_SETIMECOLOR 1.0asian
  86   - EM_SETIMEOPTIONS 1.0asian
  87   - EM_SETLANGOPTIONS 2.0
  88   - EM_SETLIMITTEXT
  89   + EM_SETMODIFY (not sure if implementation is correct)
  90   - EM_SETOLECALLBACK
  91   - EM_SETOPTIONS
  92   + EM_SETPARAFORMAT
  93   - EM_SETPUNCTUATION 1.0asian
  94   + EM_SETREADONLY no beep on modification attempt
  95   - EM_SETRECT
  96   - EM_SETRECTNP (EM_SETRECT without repainting) - not supported in RICHEDIT
  97   + EM_SETSEL
  98   - EM_SETTARGETDEVICE
  99   - EM_SETTEXTMODE 2.0
 100   - EM_SETUNDOLIMIT 2.0
 101   - EM_SETWORDBREAKPROC
 102   - EM_SETWORDBREAKPROCEX
 103   - EM_SETWORDWRAPMODE 1.0asian
 104   - EM_STOPGROUPTYPING 2.0
 105   - EM_STREAMIN
 106   - EM_STREAMOUT
 107   - EM_UNDO
 108   + WM_CHAR
 109   + WM_CLEAR
 110   - WM_COPY (lame implementation, no RTF support)
 111   - WM_CUT (lame implementation, no RTF support)
 112   + WM_GETDLGCODE (the current implementation is incomplete)
 113   + WM_GETTEXT (ANSI&Unicode)
 114   + WM_GETTEXTLENGTH (ANSI version sucks)
 115   - WM_PASTE
 116   - WM_SETFONT
 117   + WM_SETTEXT (resets undo stack !) (proper style?) ANSI&Unicode
 118   - WM_STYLECHANGING
 119   - WM_STYLECHANGED (things like read-only flag)
 120   - WM_UNICHAR
 121
 122   Notifications
 123
 124   * EN_CHANGE (sent from the wrong place)
 125   - EN_CORRECTTEXT
 126   - EN_DROPFILES
 127   - EN_ERRSPACE
 128   - EN_HSCROLL
 129   - EN_IMECHANGE
 130   + EN_KILLFOCUS
 131   - EN_LINK
 132   - EN_MAXTEXT
 133   - EN_MSGFILTER
 134   - EN_OLEOPFAILED
 135   - EN_PROTECTED
 136   - EN_REQUESTRESIZE
 137   - EN_SAVECLIPBOARD
 138   + EN_SELCHANGE
 139   + EN_SETFOCUS
 140   - EN_STOPNOUNDO
 141   * EN_UPDATE (sent from the wrong place)
 142   - EN_VSCROLL
 143
 144   Styles
 145
 146   - ES_AUTOHSCROLL
 147   - ES_AUTOVSCROLL
 148   - ES_CENTER
 149   - ES_DISABLENOSCROLL (scrollbar is always visible)
 150   - ES_EX_NOCALLOLEINIT
 151   - ES_LEFT
 152   - ES_MULTILINE (currently single line controls aren't supported)
 153   - ES_NOIME
 154   - ES_READONLY (I'm not sure if beeping is the proper behaviour)
 155   - ES_RIGHT
 156   - ES_SAVESEL
 157   - ES_SELFIME
 158   - ES_SUNKEN
 159   - ES_VERTICAL
 160   - ES_WANTRETURN (don't know how to do WM_GETDLGCODE part)
 161   - WS_SETFONT
 162   - WS_HSCROLL
 163   - WS_VSCROLL
 164 */
 165
 166 /*
 167  * RICHED20 TODO (incomplete):
 168  *
 169  * - font caching
 170  * - add remaining CHARFORMAT/PARAFORMAT fields
 171  * - right/center align should strip spaces from the beginning
 172  * - more advanced navigation (Ctrl-arrows, PageUp/PageDn)
 173  * - tabs
 174  * - pictures (not just smiling faces that lack API support ;-) )
 175  * - OLE objects
 176  * - calculate heights of pictures (half-done)
 177  * - EM_STREAMIN/EM_STREAMOUT
 178  * - horizontal scrolling (not even started)
 179  * - fix scrollbars and refresh (it sucks bigtime)
 180  * - hysteresis during wrapping (related to scrollbars appearing/disappearing)
 181  * - should remember maximum row width for wrap hysteresis
 182  * - find/replace
 183  * - how to implement EM_FORMATRANGE and EM_DISPLAYBAND ? (Mission Impossible)
 184  * - italic cursor with italic fonts
 185  * - IME
 186  * - most notifications aren't sent at all (the most important ones are)
 187  * - when should EN_SELCHANGE be sent after text change ? (before/after EN_UPDATE?)
 188  * - WM_SETTEXT may use wrong style (but I'm 80% sure it's OK)
 189  * - EM_GETCHARFORMAT with SCF_SELECTION may not behave 100% like in original (but very close)
 190  * - bugs in end-of-text handling (the gray bar) could get me in jail ;-)
 191  * - determination of row size
 192  * - end-of-paragraph marks should be of reasonable size
 193  *
 194  * Bugs that are probably fixed, but not so easy to verify:
 195  * - EN_UPDATE/EN_CHANGE are handled very incorrectly (should be OK now)
 196  * - undo for ME_JoinParagraphs doesn't store paragraph format ? (it does)
 197  * - check/fix artificial EOL logic (bCursorAtEnd, hardly logical)
 198  * - caret shouldn't be displayed when selection isn't empty
 199  * - check refcounting in style management functions (looks perfect now, but no bugs is suspicious)
 200  * - undo for setting default format (done, might be buggy)
 201  * - styles might be not released properly (looks like they work like charm, but who knows?
 202  *
 203  */
 204
 205 #include "editor.h"
 206 #include <ole2.h>
 207 #include <richole.h>
 208 #include <winreg.h>
 209 #define NO_SHLWAPI_STREAM
 210 #include <shlwapi.h>
 211
 212 #include "rtf.h"
 213
 214 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
 215
 216 int me_debug = 0;
 217 HANDLE me_heap = NULL;
 218
 219 ME_TextBuffer *ME_MakeText() {
 220
 221   ME_TextBuffer *buf = ALLOC_OBJ(ME_TextBuffer);
 222
 223   ME_DisplayItem *p1 = ME_MakeDI(diTextStart);
 224   ME_DisplayItem *p2 = ME_MakeDI(diTextEnd);
 225
 226   p1->prev = NULL;
 227   p1->next = p2;
 228   p2->prev = p1;
 229   p2->next = NULL;
 230   p1->member.para.next_para = p2;
 231   p2->member.para.prev_para = p1;
 232   p2->member.para.nCharOfs = 0;
 233
 234   buf->pFirst = p1;
 235   buf->pLast = p2;
 236   buf->pCharStyle = NULL;
 237
 238   return buf;
 239 }
 240
 241 #define STREAMIN_BUFFER_SIZE 4096 /* M$ compatibility */
 242
 243 static LRESULT ME_StreamInText(ME_TextEditor *editor, DWORD dwFormat, EDITSTREAM *stream, ME_Style *style)
 244 {
 245   BYTE buffer[STREAMIN_BUFFER_SIZE+1];
 246   WCHAR wszText[STREAMIN_BUFFER_SIZE+1];
 247
 248   TRACE("%08lx %p\n", dwFormat, stream);
 249   stream->dwError = 0;
 250
 251   do {
 252     long nDataSize = 0, nWideChars = 0;
 253     stream->dwError = stream->pfnCallback(stream->dwCookie,
 254       (dwFormat & SF_UNICODE ? (BYTE *)wszText : buffer),
 255       STREAMIN_BUFFER_SIZE, &nDataSize);
 256
 257     if (stream->dwError)
 258       break;
 259     if (!nDataSize)
 260       break;
 261
 262     if (!(dwFormat & SF_UNICODE))
 263     {
 264       /* FIXME? this is doomed to fail on true MBCS like UTF-8, luckily they're unlikely to be used as CP_ACP */
 265       nWideChars = MultiByteToWideChar(CP_ACP, 0, buffer, nDataSize, wszText, STREAMIN_BUFFER_SIZE);
 266     }
 267     else
 268       nWideChars = nDataSize>>1;
 269     ME_InsertTextFromCursor(editor, 0, wszText, nWideChars, style);
 270     if (nDataSize<STREAMIN_BUFFER_SIZE)
 271       break;
 272   } while(1);
 273   ME_CommitUndo(editor);
 274   return 0;
 275 }
 276
 277 static LRESULT ME_StreamIn(ME_TextEditor *editor, DWORD format, EDITSTREAM *stream)
 278 {
 279   RTF_Info parser;
 280   ME_Style *style;
 281
 282   FIXME("%08lx %p\n", format, stream);
 283   TRACE("%p %p\n", stream, editor->hWnd);
 284
 285   if (format & SFF_SELECTION) {
 286     style = ME_GetSelectionInsertStyle(editor);
 287     SendMessageW(editor->hWnd, WM_CLEAR, 0, 0);
 288   }
 289   else {
 290     style = editor->pBuffer->pDefaultStyle;
 291     ME_AddRefStyle(style);
 292     SendMessageA(editor->hWnd, EM_SETSEL, 0, 0);
 293     SetWindowTextA(editor->hWnd, "");
 294     ME_ClearTempStyle(editor);
 295   }
 296
 297   if (format & SF_RTF) {
 298     /* setup the RTF parser */
 299     memset(&parser, 0, sizeof parser);
 300     RTFSetEditStream(&parser, stream);
 301     parser.rtfFormat = format&(SF_TEXT|SF_RTF);
 302     parser.hwndEdit = editor->hWnd;
 303     WriterInit(&parser);
 304     RTFInit(&parser);
 305     BeginFile(&parser);
 306
 307     /* do the parsing */
 308     RTFRead(&parser);
 309     RTFFlushOutputBuffer(&parser);
 310   }
 311   else if (format & SF_TEXT)
 312     ME_StreamInText(editor, format, stream, style);
 313   else
 314     ERR("EM_STREAMIN without SF_TEXT or SF_RTF\n");
 315   /* put the cursor at the top */
 316   if (!(format & SFF_SELECTION))
 317     SendMessageA(editor->hWnd, EM_SETSEL, 0, 0);
 318   else
 319   {
 320     /* FIXME where to put cursor now ? */
 321   }
 322   ME_ReleaseStyle(style);
 323
 324   return 0;
 325 }
 326
 327 ME_TextEditor *ME_MakeEditor(HWND hWnd) {
 328   ME_TextEditor *ed = ALLOC_OBJ(ME_TextEditor);
 329   HDC hDC;
 330   int i;
 331   ed->hWnd = hWnd;
 332   ed->pBuffer = ME_MakeText();
 333   hDC = GetDC(hWnd);
 334   ME_MakeFirstParagraph(hDC, ed->pBuffer);
 335   ReleaseDC(hWnd, hDC);
 336   ed->bCaretShown = FALSE;
 337   ed->nCursors = 3;
 338   ed->pCursors = ALLOC_N_OBJ(ME_Cursor, ed->nCursors);
 339   ed->pCursors[0].pRun = ME_FindItemFwd(ed->pBuffer->pFirst, diRun);
 340   ed->pCursors[0].nOffset = 0;
 341   ed->pCursors[1].pRun = ME_FindItemFwd(ed->pBuffer->pFirst, diRun);
 342   ed->pCursors[1].nOffset = 0;
 343   ed->nTotalLength = 0;
 344   ed->nScrollPos = 0;
 345   ed->nUDArrowX = -1;
 346   ed->nSequence = 0;
 347   ed->rgbBackColor = -1;
 348   ed->bCaretAtEnd = FALSE;
 349   ed->nEventMask = 0;
 350   ed->nModifyStep = 0;
 351   ed->pUndoStack = ed->pRedoStack = NULL;
 352   ed->nUndoMode = umAddToUndo;
 353   ed->nParagraphs = 1;
 354   ed->nLastSelStart = ed->nLastSelEnd = 0;
 355   for (i=0; i<HFONT_CACHE_SIZE; i++)
 356   {
 357     ed->pFontCache[i].nRefs = 0;
 358     ed->pFontCache[i].nAge = 0;
 359     ed->pFontCache[i].hFont = NULL;
 360   }
 361   ME_CheckCharOffsets(ed);
 362   return ed;
 363 }
 364
 365 void ME_DestroyEditor(ME_TextEditor *editor)
 366 {
 367   ME_DisplayItem *pFirst = editor->pBuffer->pFirst;
 368   ME_DisplayItem *p = pFirst, *pNext = NULL;
 369   int i;
 370
 371   ME_ClearTempStyle(editor);
 372   ME_EmptyUndoStack(editor);
 373   while(p) {
 374     pNext = p->next;
 375     ME_DestroyDisplayItem(p);
 376     p = pNext;
 377   }
 378   ME_ReleaseStyle(editor->pBuffer->pDefaultStyle);
 379   for (i=0; i<HFONT_CACHE_SIZE; i++)
 380   {
 381     if (editor->pFontCache[i].hFont)
 382       DeleteObject(editor->pFontCache[i].hFont);
 383   }
 384
 385   FREE_OBJ(editor);
 386 }
 387
 388 #define UNSUPPORTED_MSG(e) \
 389   case e: \
 390     FIXME(#e ": stub\n"); \
 391     return DefWindowProcW(hWnd, msg, wParam, lParam);
 392
 393 /******************************************************************
 394  *        RichEditANSIWndProc (RICHED20.10)
 395  */
 396 LRESULT WINAPI RichEditANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) {
 397   HDC hDC;
 398   PAINTSTRUCT ps;
 399   SCROLLINFO si;
 400   ME_TextEditor *editor = (ME_TextEditor *)GetWindowLongW(hWnd, 0);
 401   switch(msg) {
 402
 403   UNSUPPORTED_MSG(EM_AUTOURLDETECT)
 404   UNSUPPORTED_MSG(EM_CANPASTE)
 405   UNSUPPORTED_MSG(EM_CHARFROMPOS)
 406   UNSUPPORTED_MSG(EM_DISPLAYBAND)
 407   UNSUPPORTED_MSG(EM_EXLIMITTEXT)
 408   UNSUPPORTED_MSG(EM_EXLINEFROMCHAR)
 409   UNSUPPORTED_MSG(EM_FINDTEXT)
 410   UNSUPPORTED_MSG(EM_FINDTEXTEX)
 411   UNSUPPORTED_MSG(EM_FINDWORDBREAK)
 412   UNSUPPORTED_MSG(EM_FMTLINES)
 413   UNSUPPORTED_MSG(EM_FORMATRANGE)
 414   UNSUPPORTED_MSG(EM_GETFIRSTVISIBLELINE)
 415   UNSUPPORTED_MSG(EM_GETIMECOMPMODE)
 416   /* UNSUPPORTED_MSG(EM_GETIMESTATUS) missing in Wine headers */
 417   UNSUPPORTED_MSG(EM_GETLANGOPTIONS)
 418   UNSUPPORTED_MSG(EM_GETLIMITTEXT)
 419   UNSUPPORTED_MSG(EM_GETLINE)
 420   UNSUPPORTED_MSG(EM_GETLINECOUNT)
 421   /* UNSUPPORTED_MSG(EM_GETOLEINTERFACE) separate stub */
 422   UNSUPPORTED_MSG(EM_GETOPTIONS)
 423   UNSUPPORTED_MSG(EM_GETRECT)
 424   UNSUPPORTED_MSG(EM_GETREDONAME)
 425   UNSUPPORTED_MSG(EM_GETTEXTMODE)
 426   UNSUPPORTED_MSG(EM_GETUNDONAME)
 427   UNSUPPORTED_MSG(EM_GETWORDBREAKPROC)
 428   UNSUPPORTED_MSG(EM_GETWORDBREAKPROCEX)
 429   UNSUPPORTED_MSG(EM_HIDESELECTION)
 430   UNSUPPORTED_MSG(EM_LIMITTEXT) /* also known as EM_SETLIMITTEXT */
 431   UNSUPPORTED_MSG(EM_LINEFROMCHAR)
 432   UNSUPPORTED_MSG(EM_LINEINDEX)
 433   UNSUPPORTED_MSG(EM_LINELENGTH)
 434   UNSUPPORTED_MSG(EM_LINESCROLL)
 435   UNSUPPORTED_MSG(EM_PASTESPECIAL)
 436 /*  UNSUPPORTED_MSG(EM_POSFROMCHARS) missing in Wine headers */
 437   UNSUPPORTED_MSG(EM_REQUESTRESIZE)
 438   UNSUPPORTED_MSG(EM_SCROLL)
 439   UNSUPPORTED_MSG(EM_SCROLLCARET)
 440   UNSUPPORTED_MSG(EM_SELECTIONTYPE)
 441   UNSUPPORTED_MSG(EM_SETLANGOPTIONS)
 442   UNSUPPORTED_MSG(EM_SETOLECALLBACK)
 443   UNSUPPORTED_MSG(EM_SETOPTIONS)
 444   UNSUPPORTED_MSG(EM_SETRECT)
 445   UNSUPPORTED_MSG(EM_SETRECTNP)
 446   UNSUPPORTED_MSG(EM_SETTARGETDEVICE)
 447   UNSUPPORTED_MSG(EM_SETTEXTMODE)
 448   UNSUPPORTED_MSG(EM_SETUNDOLIMIT)
 449   UNSUPPORTED_MSG(EM_SETWORDBREAKPROC)
 450   UNSUPPORTED_MSG(EM_SETWORDBREAKPROCEX)
 451   UNSUPPORTED_MSG(EM_STREAMOUT)
 452   UNSUPPORTED_MSG(WM_SETFONT)
 453   UNSUPPORTED_MSG(WM_PASTE)
 454   UNSUPPORTED_MSG(WM_STYLECHANGING)
 455   UNSUPPORTED_MSG(WM_STYLECHANGED)
 456 /*  UNSUPPORTED_MSG(WM_UNICHAR) FIXME missing in Wine headers */
 457
 458 /* Messages specific to Richedit controls */
 459
 460   case EM_STREAMIN:
 461    return ME_StreamIn(editor, wParam, (EDITSTREAM*)lParam);
 462   case WM_GETDLGCODE:
 463   {
 464     UINT code = DLGC_WANTCHARS|DLGC_WANTARROWS;
 465     if (GetWindowLongW(hWnd, GWL_STYLE)&ES_WANTRETURN)
 466       code |= 0; /* FIXME what can we do here ? ask for messages and censor them ? */
 467     return code;
 468   }
 469   case WM_NCCREATE:
 470   {
 471     CREATESTRUCTW *pcs = (CREATESTRUCTW *)lParam;
 472     editor = ME_MakeEditor(hWnd);
 473     SetWindowLongW(hWnd, 0, (long)editor);
 474     pcs = 0; /* ignore */
 475     return TRUE;
 476   }
 477   case EM_EMPTYUNDOBUFFER:
 478     ME_EmptyUndoStack(editor);
 479     return 0;
 480   case EM_GETSEL:
 481   {
 482     ME_GetSelection(editor, (int *)wParam, (int *)lParam);
 483     if (!((wParam|lParam) & 0xFFFF0000))
 484       return (lParam<<16)|wParam;
 485     return -1;
 486   }
 487   case EM_EXGETSEL:
 488   {
 489     CHARRANGE *pRange = (CHARRANGE *)lParam;
 490     ME_GetSelection(editor, (int *)&pRange->cpMin, (int *)&pRange->cpMax);
 491     return 0;
 492   }
 493   case EM_CANUNDO:
 494     return editor->pUndoStack != NULL;
 495   case EM_CANREDO:
 496     return editor->pRedoStack != NULL;
 497   case EM_UNDO:
 498     ME_Undo(editor);
 499     return 0;
 500   case EM_REDO:
 501     ME_Redo(editor);
 502     return 0;
 503   case EM_SETSEL:
 504   {
 505     ME_SetSelection(editor, wParam, lParam);
 506     ME_Repaint(editor);
 507     ME_SendSelChange(editor);
 508     return 0;
 509   }
 510   case EM_EXSETSEL:
 511   {
 512     CHARRANGE *pRange = (CHARRANGE *)lParam;
 513     ME_SetSelection(editor, pRange->cpMin, pRange->cpMax);
 514     /* FIXME optimize */
 515     ME_Repaint(editor);
 516     ME_SendSelChange(editor);
 517     return 0;
 518   }
 519   case EM_SETBKGNDCOLOR:
 520   {
 521     LRESULT lColor = ME_GetBackColor(editor);
 522     if (wParam)
 523       editor->rgbBackColor = -1;
 524     else
 525       editor->rgbBackColor = lParam;
 526     InvalidateRect(hWnd, NULL, TRUE);
 527     UpdateWindow(hWnd);
 528     return lColor;
 529   }
 530   case EM_GETMODIFY:
 531     return editor->nModifyStep == 0 ? 0 : 1;
 532   case EM_SETMODIFY:
 533   {
 534     if (wParam)
 535       editor->nModifyStep = 0x80000000;
 536     else
 537       editor->nModifyStep = 0;
 538
 539     return 0;
 540   }
 541   case EM_SETREADONLY:
 542   {
 543     long nStyle = GetWindowLongW(hWnd, GWL_STYLE);
 544     if (wParam)
 545       nStyle |= ES_READONLY;
 546     else
 547       nStyle &= ~ES_READONLY;
 548     SetWindowLongW(hWnd, GWL_STYLE, nStyle);
 549     ME_Repaint(editor);
 550     return 0;
 551   }
 552   case EM_SETEVENTMASK:
 553     editor->nEventMask = lParam;
 554     return 0;
 555   case EM_GETEVENTMASK:
 556     return editor->nEventMask;
 557   case EM_SETCHARFORMAT:
 558   {
 559     CHARFORMAT2W buf, *p;
 560     p = ME_ToCF2W(&buf, (CHARFORMAT2W *)lParam);
 561     if (!wParam)
 562       ME_SetDefaultCharFormat(editor, p);
 563     else if (wParam == (SCF_WORD | SCF_SELECTION))
 564       FIXME("word selection not supported\n");
 565     else if (wParam == SCF_ALL)
 566       ME_SetCharFormat(editor, 0, ME_GetTextLength(editor), p);
 567     else
 568       ME_SetSelectionCharFormat(editor, p);
 569     ME_CommitUndo(editor);
 570     ME_UpdateRepaint(editor);
 571     return 0;
 572   }
 573   case EM_GETCHARFORMAT:
 574   {
 575     CHARFORMAT2W tmp;
 576     tmp.cbSize = sizeof(tmp);
 577     if (!wParam)
 578       ME_GetDefaultCharFormat(editor, &tmp);
 579     else
 580       ME_GetSelectionCharFormat(editor, &tmp);
 581     ME_CopyToCFAny((CHARFORMAT2W *)lParam, &tmp);
 582     return 0;
 583   }
 584   case EM_SETPARAFORMAT:
 585     ME_SetSelectionParaFormat(editor, (PARAFORMAT2 *)lParam);
 586     ME_CommitUndo(editor);
 587     return 0;
 588   case EM_GETPARAFORMAT:
 589     ME_GetSelectionParaFormat(editor, (PARAFORMAT2 *)lParam);
 590     return 0;
 591   case WM_CLEAR:
 592   {
 593     int from, to;
 594     ME_GetSelection(editor, &from, &to);
 595     ME_InternalDeleteText(editor, from, to-from);
 596     ME_CommitUndo(editor);
 597     ME_UpdateRepaint(editor);
 598     return 0;
 599   }
 600   case EM_REPLACESEL:
 601   {
 602     int from, to;
 603     ME_Style *style;
 604     LPWSTR wszText = ME_ToUnicode(hWnd, (void *)lParam);
 605     size_t len = lstrlenW(wszText);
 606     TRACE("EM_REPLACESEL - %s\n", debugstr_w(wszText));
 607
 608     ME_GetSelection(editor, &from, &to);
 609     style = ME_GetSelectionInsertStyle(editor);
 610     ME_InternalDeleteText(editor, from, to-from);
 611     ME_InsertTextFromCursor(editor, 0, wszText, len, style);
 612     ME_ReleaseStyle(style);
 613     ME_EndToUnicode(hWnd, wszText);
 614     /* drop temporary style if line end */
 615     /* FIXME question: does abc\n mean: put abc, clear temp style, put \n? (would require a change) */
 616     if (len>0 && wszText[len-1] == '\n')
 617       ME_ClearTempStyle(editor);
 618
 619     ME_CommitUndo(editor);
 620     if (!wParam)
 621       ME_EmptyUndoStack(editor);
 622     ME_UpdateRepaint(editor);
 623     return 0;
 624   }
 625   case WM_SETTEXT:
 626   {
 627     LPWSTR wszText = ME_ToUnicode(hWnd, (void *)lParam);
 628     TRACE("WM_SETTEXT - %s\n", (char *)(wszText)); /* debugstr_w() */
 629     ME_InternalDeleteText(editor, 0, ME_GetTextLength(editor));
 630     /* uses default style! */
 631     ME_InsertTextFromCursor(editor, 0, wszText, -1, editor->pBuffer->pDefaultStyle);
 632     ME_EndToUnicode(hWnd, wszText);
 633     ME_CommitUndo(editor);
 634     ME_EmptyUndoStack(editor);
 635     ME_UpdateRepaint(editor);
 636     return 0;
 637   }
 638   case WM_CUT:
 639   case WM_COPY:
 640   {
 641     int from, to, pars;
 642     WCHAR *data;
 643     HANDLE hData;
 644
 645     if (!OpenClipboard(hWnd))
 646       return 0;
 647
 648     EmptyClipboard();
 649     ME_GetSelection(editor, &from, &to);
 650     pars = ME_CountParagraphsBetween(editor, from, to);
 651     hData = GlobalAlloc(GMEM_MOVEABLE, sizeof(WCHAR)*(to-from+pars+1));
 652     data = (WCHAR *)GlobalLock(hData);
 653     ME_GetTextW(editor, data, from, to-from, TRUE);
 654     GlobalUnlock(hData);
 655     SetClipboardData(CF_UNICODETEXT, hData);
 656     CloseClipboard();
 657     if (msg == WM_CUT)
 658     {
 659       ME_InternalDeleteText(editor, from, to-from);
 660       ME_CommitUndo(editor);
 661       ME_UpdateRepaint(editor);
 662     }
 663     return 0;
 664   }
 665   case WM_GETTEXTLENGTH:
 666     return ME_GetTextLength(editor);
 667   case WM_GETTEXT:
 668   {
 669     TEXTRANGEW tr; /* W and A differ only by rng->lpstrText */
 670     tr.chrg.cpMin = 0;
 671     tr.chrg.cpMax = wParam-1;
 672     tr.lpstrText = (WCHAR *)lParam;
 673     return RichEditANSIWndProc(hWnd, EM_GETTEXTRANGE, 0, (LPARAM)&tr);
 674   }
 675   case EM_GETSELTEXT:
 676   {
 677     int from, to;
 678     TEXTRANGEW tr; /* W and A differ only by rng->lpstrText */
 679     ME_GetSelection(editor, &from, &to);
 680     tr.chrg.cpMin = from;
 681     tr.chrg.cpMax = to;
 682     tr.lpstrText = (WCHAR *)lParam;
 683     return RichEditANSIWndProc(hWnd, EM_GETTEXTRANGE, 0, (LPARAM)&tr);
 684   }
 685   case EM_GETTEXTRANGE:
 686   {
 687     TEXTRANGEW *rng = (TEXTRANGEW *)lParam;
 688     if (IsWindowUnicode(hWnd))
 689       return ME_GetTextW(editor, rng->lpstrText, rng->chrg.cpMin, rng->chrg.cpMax-rng->chrg.cpMin, FALSE);
 690     else
 691     {
 692       int nLen = rng->chrg.cpMax-rng->chrg.cpMin;
 693       WCHAR *p = ALLOC_N_OBJ(WCHAR, nLen+1);
 694       int nChars = ME_GetTextW(editor, p, rng->chrg.cpMin, nLen, FALSE);
 695       /* FIXME this is a potential security hole (buffer overrun)
 696          if you know more about wchar->mbyte conversion please explain
 697       */
 698       WideCharToMultiByte(CP_ACP, 0, p, nChars+1, (char *)rng->lpstrText, nLen+1, NULL, NULL);
 699       FREE_OBJ(p);
 700       return nChars;
 701     }
 702     return ME_GetTextW(editor, rng->lpstrText, rng->chrg.cpMin, rng->chrg.cpMax-rng->chrg.cpMin, FALSE);
 703   }
 704   case WM_CREATE:
 705     ME_CommitUndo(editor);
 706 /*    ME_InsertTextFromCursor(editor, 0, (WCHAR *)L"x", 1, editor->pBuffer->pDefaultStyle); */
 707     ME_WrapMarkedParagraphs(editor);
 708     ME_MoveCaret(editor);
 709     return 0;
 710   case WM_DESTROY:
 711     ME_DestroyEditor(editor);
 712     SetWindowLongW(hWnd, 0, 0);
 713     PostQuitMessage(0);
 714     break;
 715   case WM_LBUTTONDOWN:
 716     SetFocus(hWnd);
 717     ME_LButtonDown(editor, (short)LOWORD(lParam), (short)HIWORD(lParam));
 718     SetCapture(hWnd);
 719     break;
 720   case WM_MOUSEMOVE:
 721     if (GetCapture() == hWnd)
 722       ME_MouseMove(editor, (short)LOWORD(lParam), (short)HIWORD(lParam));
 723     break;
 724   case WM_LBUTTONUP:
 725     if (GetCapture() == hWnd)
 726       ReleaseCapture();
 727     break;
 728   case WM_PAINT:
 729     hDC = BeginPaint(hWnd, &ps);
 730     ME_PaintContent(editor, hDC, FALSE);
 731     EndPaint(hWnd, &ps);
 732     break;
 733   case WM_SETFOCUS:
 734     ME_ShowCaret(editor);
 735     ME_SendOldNotify(editor, EN_SETFOCUS);
 736     return 0;
 737   case WM_KILLFOCUS:
 738     ME_HideCaret(editor);
 739     ME_SendOldNotify(editor, EN_KILLFOCUS);
 740     return 0;
 741   case WM_ERASEBKGND:
 742   {
 743     HDC hDC = (HDC)wParam;
 744     RECT rc;
 745     COLORREF rgbBG = ME_GetBackColor(editor);
 746     if (GetUpdateRect(hWnd,&rc,TRUE))
 747     {
 748       HBRUSH hbr = CreateSolidBrush(rgbBG);
 749       FillRect(hDC, &rc, hbr);
 750       DeleteObject(hbr);
 751     }
 752     return 1;
 753   }
 754   case WM_COMMAND:
 755     TRACE("editor wnd command = %d\n", LOWORD(wParam));
 756     return 0;
 757   case WM_KEYDOWN:
 758     if (ME_ArrowKey(editor, LOWORD(wParam), GetKeyState(VK_CONTROL)<0)) {
 759       ME_CommitUndo(editor);
 760       ME_EnsureVisible(editor, editor->pCursors[0].pRun);
 761       HideCaret(hWnd);
 762       ME_MoveCaret(editor);
 763       ShowCaret(hWnd);
 764       return 0;
 765     }
 766     if (GetKeyState(VK_CONTROL)<0)
 767     {
 768       if (LOWORD(wParam)=='W')
 769       {
 770         CHARFORMAT2W chf;
 771         char buf[2048];
 772         ME_GetSelectionCharFormat(editor, &chf);
 773         ME_DumpStyleToBuf(&chf, buf);
 774         MessageBoxA(NULL, buf, "Style dump", MB_OK);
 775       }
 776       if (LOWORD(wParam)=='Q')
 777       {
 778         ME_CheckCharOffsets(editor);
 779       }
 780     }
 781     goto do_default;
 782   case WM_CHAR:
 783   {
 784     WCHAR wstr;
 785     if (GetWindowLongW(editor->hWnd, GWL_STYLE) & ES_READONLY) {
 786       MessageBeep(MB_ICONERROR);
 787       return 0; /* FIXME really 0 ? */
 788     }
 789     wstr = LOWORD(wParam);
 790     if (((unsigned)wstr)>=' ' || wstr=='\r') {
 791       /* FIXME maybe it would make sense to call EM_REPLACESEL instead ? */
 792       ME_Style *style = ME_GetInsertStyle(editor, 0);
 793       ME_SaveTempStyle(editor);
 794       ME_InsertTextFromCursor(editor, 0, &wstr, 1, style);
 795       ME_ReleaseStyle(style);
 796       ME_CommitUndo(editor);
 797       ME_UpdateRepaint(editor);
 798     }
 799     return 0;
 800   }
 801   case WM_VSCROLL:
 802   {
 803     si.cbSize = sizeof(SCROLLINFO);
 804     si.fMask = SIF_PAGE|SIF_POS|SIF_RANGE|SIF_TRACKPOS;
 805     GetScrollInfo(hWnd, SB_VERT, &si);
 806     switch(LOWORD(wParam)) {
 807     case SB_THUMBTRACK:
 808       SetScrollPos(hWnd, SB_VERT, si.nTrackPos, FALSE);
 809       ScrollWindow(hWnd, 0, si.nPos-si.nTrackPos, NULL, NULL);
 810       /* InvalidateRect(hWnd, NULL, TRUE); */
 811       UpdateWindow(hWnd);
 812       break;
 813     }
 814     break;
 815   }
 816   case WM_SIZE:
 817   {
 818     ME_MarkAllForWrapping(editor);
 819     ME_Repaint(editor);
 820     return DefWindowProcW(hWnd, msg, wParam, lParam);
 821   }
 822   case EM_GETOLEINTERFACE:
 823   {
 824     LPVOID *ppvObj = (LPVOID*) lParam;
 825     TRACE("EM_GETOLEINTERFACE %p\n", ppvObj);
 826     return CreateIRichEditOle(ppvObj);
 827   }
 828   default:
 829   do_default:
 830     return DefWindowProcW(hWnd, msg, wParam, lParam);
 831   }
 832   return 0L;
 833 }
 834
 835 /******************************************************************
 836  *        RichEdit10ANSIWndProc (RICHED20.9)
 837  */
 838 LRESULT WINAPI RichEdit10ANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
 839 {
 840   /* FIXME: this is NOT the same as 2.0 version */
 841   return RichEditANSIWndProc(hWnd, msg, wParam, lParam);
 842 }
 843
 844 void ME_SendOldNotify(ME_TextEditor *editor, int nCode)
 845 {
 846   HWND hWnd = editor->hWnd;
 847   SendMessageA(GetParent(hWnd), WM_COMMAND, (nCode<<16)|GetWindowLongW(hWnd, GWLP_ID), (LPARAM)hWnd);
 848 }
 849
 850 int ME_CountParagraphsBetween(ME_TextEditor *editor, int from, int to)
 851 {
 852   ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
 853   int i = 0;
 854
 855   while(item && item->member.para.next_para->member.para.nCharOfs <= from)
 856     item = item->member.para.next_para;
 857   if (!item)
 858     return 0;
 859   while(item && item->member.para.next_para->member.para.nCharOfs <= to) {
 860     item = item->member.para.next_para;
 861     i++;
 862   }
 863   return i;
 864 }
 865
 866 int ME_GetTextW(ME_TextEditor *editor, WCHAR *buffer, int nStart, int nChars, int bCRLF)
 867 {
 868   ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
 869   int nWritten = 0;
 870
 871   while(item && item->member.para.next_para->member.para.nCharOfs <= nStart)
 872     item = ME_FindItemFwd(item, diParagraph);
 873   if (!item) {
 874     *buffer = L'\0';
 875     return 0;
 876   }
 877   nStart -= item->member.para.nCharOfs;
 878
 879   do {
 880     item = ME_FindItemFwd(item, diRun);
 881   } while(item && (item->member.run.nCharOfs + ME_StrLen(item->member.run.strText) <= nStart));
 882   assert(item);
 883
 884   nStart -= item->member.run.nCharOfs;
 885
 886   if (nStart)
 887   {
 888     int nLen = ME_StrLen(item->member.run.strText) - nStart;
 889     if (nLen > nChars)
 890       nLen = nChars;
 891     CopyMemory(buffer, item->member.run.strText->szData + nStart, sizeof(WCHAR)*nLen);
 892     nChars -= nLen;
 893     nWritten += nLen;
 894     if (!nChars)
 895       return nWritten;
 896     buffer += nLen;
 897     nStart = 0;
 898     item = ME_FindItemFwd(item, diRun);
 899   }
 900
 901   while(nChars && item)
 902   {
 903     int nLen = ME_StrLen(item->member.run.strText);
 904     if (nLen > nChars)
 905       nLen = nChars;
 906
 907     if (item->member.run.nFlags & MERF_ENDPARA)
 908     {
 909       if (bCRLF) {
 910         *buffer++ = '\r';
 911         nWritten++;
 912       }
 913       *buffer = '\n';
 914       assert(nLen == 1);
 915     }
 916     else
 917       CopyMemory(buffer, item->member.run.strText->szData, sizeof(WCHAR)*nLen);
 918     nChars -= nLen;
 919     nWritten += nLen;
 920     buffer += nLen;
 921
 922     if (!nChars)
 923     {
 924       *buffer = L'\0';
 925       return nWritten;
 926     }
 927     item = ME_FindItemFwd(item, diRun);
 928   }
 929   *buffer = L'\0';
 930   return nWritten;
 931 }
 932
 933 static WCHAR wszClassName[] = {'R', 'i', 'c', 'h', 'E', 'd', 'i', 't', '2', '0', 'W', 0};
 934 static WCHAR wszClassName50[] = {'R', 'i', 'c', 'h', 'E', 'd', 'i', 't', '5', '0', 'W', 0};
 935
 936 void ME_RegisterEditorClass(HINSTANCE hInstance)
 937 {
 938   BOOL bResult;
 939   WNDCLASSW wcW;
 940   WNDCLASSA wcA;
 941
 942   wcW.style = CS_HREDRAW | CS_VREDRAW;
 943   wcW.lpfnWndProc = RichEditANSIWndProc;
 944   wcW.cbClsExtra = 0;
 945   wcW.cbWndExtra = 4;
 946   wcW.hInstance = NULL; /* hInstance would register DLL-local class */
 947   wcW.hIcon = NULL;
 948   wcW.hCursor = LoadCursorW(NULL, MAKEINTRESOURCEW(IDC_IBEAM));
 949   wcW.hbrBackground = (HBRUSH)GetStockObject(NULL_BRUSH);
 950   wcW.lpszMenuName = NULL;
 951   wcW.lpszClassName = wszClassName;
 952   bResult = RegisterClassW(&wcW);
 953   assert(bResult);
 954   wcW.lpszClassName = wszClassName50;
 955   bResult = RegisterClassW(&wcW);
 956   assert(bResult);
 957
 958   wcA.style = CS_HREDRAW | CS_VREDRAW;
 959   wcA.lpfnWndProc = RichEditANSIWndProc;
 960   wcA.cbClsExtra = 0;
 961   wcA.cbWndExtra = 4;
 962   wcA.hInstance = NULL; /* hInstance would register DLL-local class */
 963   wcA.hIcon = NULL;
 964   wcA.hCursor = LoadCursorW(NULL, MAKEINTRESOURCEW(IDC_IBEAM));
 965   wcA.hbrBackground = (HBRUSH)GetStockObject(NULL_BRUSH);
 966   wcA.lpszMenuName = NULL;
 967   wcA.lpszClassName = "RichEdit20A";
 968   bResult = RegisterClassA(&wcA);
 969   assert(bResult);
 970   wcA.lpszClassName = "RichEdit50A";
 971   bResult = RegisterClassA(&wcA);
 972   assert(bResult);
 973 }
 974
 975 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 976 {
 977     TRACE("\n");
 978     switch (fdwReason)
 979     {
 980     case DLL_PROCESS_ATTACH:
 981       DisableThreadLibraryCalls(hinstDLL);
 982       me_heap = HeapCreate (0, 0x10000, 0);
 983       ME_RegisterEditorClass(hinstDLL);
 984       break;
 985
 986     case DLL_PROCESS_DETACH:
 987       UnregisterClassW(wszClassName, 0);
 988       UnregisterClassW(wszClassName50, 0);
 989       UnregisterClassA("RichEdit20A", 0);
 990       UnregisterClassA("RichEdit50A", 0);
 991       HeapDestroy (me_heap);
 992       me_heap = NULL;
 993       break;
 994     }
 995     return TRUE;
 996 }
 997
 998 /******************************************************************
 999  *        CreateTextServices (RICHED20.4)
1000  *
1001  * FIXME should be ITextHost instead of void*
1002  */
1003 HRESULT WINAPI CreateTextServices(IUnknown *punkOuter, void *pITextHost,
1004     IUnknown **ppUnk)
1005 {
1006   FIXME("stub\n");
1007   /* FIXME should support aggregation */
1008   if (punkOuter)
1009     return CLASS_E_NOAGGREGATION;
1010
1011   return E_FAIL; /* E_NOTIMPL isn't allowed by MSDN */
1012 }
1013
1014 /******************************************************************
1015  *        REExtendedRegisterClass (RICHED20.8)
1016  *
1017  * FIXME undocumented
1018  */
1019 void WINAPI REExtendedRegisterClass(void)
1020 {
1021   FIXME("stub\n");
1022 }