reactos/lib/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 (can't fall back to text when the RTF isn't really RTF)
 106   + EM_STREAMOUT
 107   + EM_UNDO
 108   + WM_CHAR
 109   + WM_CLEAR
 110   + WM_COPY
 111   + WM_CUT
 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  * - messages/styles/notifications listed above
 170  * - Undo coalescing
 171  * - add remaining CHARFORMAT/PARAFORMAT fields
 172  * - right/center align should strip spaces from the beginning
 173  * - more advanced navigation (Ctrl-arrows)
 174  * - tabs
 175  * - pictures/OLE objects (not just smiling faces that lack API support ;-) )
 176  * - COM interface (looks like a major pain in the TODO list)
 177  * - calculate heights of pictures (half-done)
 178  * - horizontal scrolling (not even started)
 179  * - hysteresis during wrapping (related to scrollbars appearing/disappearing)
 180  * - find/replace
 181  * - how to implement EM_FORMATRANGE and EM_DISPLAYBAND ? (Mission Impossible)
 182  * - italic caret with italic fonts
 183  * - IME
 184  * - most notifications aren't sent at all (the most important ones are)
 185  * - when should EN_SELCHANGE be sent after text change ? (before/after EN_UPDATE?)
 186  * - WM_SETTEXT may use wrong style (but I'm 80% sure it's OK)
 187  * - EM_GETCHARFORMAT with SCF_SELECTION may not behave 100% like in original (but very close)
 188  *
 189  * Bugs that are probably fixed, but not so easy to verify:
 190  * - EN_UPDATE/EN_CHANGE are handled very incorrectly (should be OK now)
 191  * - undo for ME_JoinParagraphs doesn't store paragraph format ? (it does)
 192  * - check/fix artificial EOL logic (bCursorAtEnd, hardly logical)
 193  * - caret shouldn't be displayed when selection isn't empty
 194  * - check refcounting in style management functions (looks perfect now, but no bugs is suspicious)
 195  * - undo for setting default format (done, might be buggy)
 196  * - styles might be not released properly (looks like they work like charm, but who knows?
 197  *
 198  */
 199
 200 #include "editor.h"
 201 #include "ole2.h"
 202 #include "richole.h"
 203 #include "winreg.h"
 204 #define NO_SHLWAPI_STREAM
 205 #include "shlwapi.h"
 206
 207 #include "rtf.h"
 208
 209 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
 210
 211 int me_debug = 0;
 212 HANDLE me_heap = NULL;
 213
 214 ME_TextBuffer *ME_MakeText() {
 215
 216   ME_TextBuffer *buf = ALLOC_OBJ(ME_TextBuffer);
 217
 218   ME_DisplayItem *p1 = ME_MakeDI(diTextStart);
 219   ME_DisplayItem *p2 = ME_MakeDI(diTextEnd);
 220
 221   p1->prev = NULL;
 222   p1->next = p2;
 223   p2->prev = p1;
 224   p2->next = NULL;
 225   p1->member.para.next_para = p2;
 226   p2->member.para.prev_para = p1;
 227   p2->member.para.nCharOfs = 0;
 228
 229   buf->pFirst = p1;
 230   buf->pLast = p2;
 231   buf->pCharStyle = NULL;
 232
 233   return buf;
 234 }
 235
 236
 237 static LRESULT ME_StreamInText(ME_TextEditor *editor, DWORD dwFormat, ME_InStream *stream, ME_Style *style)
 238 {
 239   WCHAR wszText[STREAMIN_BUFFER_SIZE+1];
 240   WCHAR *pText;
 241
 242   TRACE("%08lx %p\n", dwFormat, stream);
 243
 244   do {
 245     long nWideChars = 0;
 246
 247     if (!stream->dwSize)
 248     {
 249       ME_StreamInFill(stream);
 250       if (stream->editstream->dwError)
 251         break;
 252       if (!stream->dwSize)
 253         break;
 254     }
 255
 256     if (!(dwFormat & SF_UNICODE))
 257     {
 258       /* FIXME? this is doomed to fail on true MBCS like UTF-8, luckily they're unlikely to be used as CP_ACP */
 259       nWideChars = MultiByteToWideChar(CP_ACP, 0, stream->buffer, stream->dwSize, wszText, STREAMIN_BUFFER_SIZE);
 260       pText = wszText;
 261     }
 262     else
 263     {
 264       nWideChars = stream->dwSize >> 1;
 265       pText = (WCHAR *)stream->buffer;
 266     }
 267
 268     ME_InsertTextFromCursor(editor, 0, pText, nWideChars, style);
 269     if (stream->dwSize < STREAMIN_BUFFER_SIZE)
 270       break;
 271   } while(1);
 272   ME_CommitUndo(editor);
 273   ME_Repaint(editor);
 274   return 0;
 275 }
 276
 277 void ME_RTFCharAttrHook(RTF_Info *info)
 278 {
 279   CHARFORMAT2W fmt;
 280   fmt.cbSize = sizeof(fmt);
 281   fmt.dwMask = 0;
 282
 283   switch(info->rtfMinor)
 284   {
 285     case rtfPlain:
 286       /* FIXME add more flags once they're implemented */
 287       fmt.dwMask = CFM_BOLD | CFM_ITALIC | CFM_UNDERLINE | CFM_STRIKEOUT | CFM_COLOR | CFM_BACKCOLOR | CFM_SIZE | CFM_WEIGHT;
 288       fmt.dwEffects = CFE_AUTOCOLOR | CFE_AUTOBACKCOLOR;
 289       fmt.yHeight = 12*20; /* 12pt */
 290       fmt.wWeight = 400;
 291       break;
 292     case rtfBold:
 293       fmt.dwMask = CFM_BOLD;
 294       fmt.dwEffects = info->rtfParam ? fmt.dwMask : 0;
 295       break;
 296     case rtfItalic:
 297       fmt.dwMask = CFM_ITALIC;
 298       fmt.dwEffects = info->rtfParam ? fmt.dwMask : 0;
 299       break;
 300     case rtfUnderline:
 301       fmt.dwMask = CFM_UNDERLINE;
 302       fmt.dwEffects = info->rtfParam ? fmt.dwMask : 0;
 303       break;
 304     case rtfStrikeThru:
 305       fmt.dwMask = CFM_STRIKEOUT;
 306       fmt.dwEffects = info->rtfParam ? fmt.dwMask : 0;
 307       break;
 308     case rtfBackColor:
 309       fmt.dwMask = CFM_BACKCOLOR;
 310       fmt.dwEffects = 0;
 311       if (info->rtfParam == 0)
 312         fmt.dwEffects = CFE_AUTOBACKCOLOR;
 313       else if (info->rtfParam != rtfNoParam)
 314       {
 315         RTFColor *c = RTFGetColor(info, info->rtfParam);
 316         fmt.crTextColor = (c->rtfCBlue<<16)|(c->rtfCGreen<<8)|(c->rtfCRed);
 317       }
 318       break;
 319     case rtfForeColor:
 320       fmt.dwMask = CFM_COLOR;
 321       fmt.dwEffects = 0;
 322       if (info->rtfParam == 0)
 323         fmt.dwEffects = CFE_AUTOCOLOR;
 324       else if (info->rtfParam != rtfNoParam)
 325       {
 326         RTFColor *c = RTFGetColor(info, info->rtfParam);
 327         fmt.crTextColor = (c->rtfCBlue<<16)|(c->rtfCGreen<<8)|(c->rtfCRed);
 328       }
 329       break;
 330     case rtfFontNum:
 331       if (info->rtfParam != rtfNoParam)
 332       {
 333         RTFFont *f = RTFGetFont(info, info->rtfParam);
 334         if (f)
 335         {
 336           MultiByteToWideChar(CP_ACP, 0, f->rtfFName, -1, fmt.szFaceName, sizeof(fmt.szFaceName)/sizeof(WCHAR));
 337           fmt.szFaceName[sizeof(fmt.szFaceName)/sizeof(WCHAR)-1] = '\0';
 338           fmt.bCharSet = f->rtfFCharSet;
 339           fmt.dwMask = CFM_FACE | CFM_CHARSET;
 340         }
 341       }
 342       break;
 343     case rtfFontSize:
 344       fmt.dwMask = CFM_SIZE;
 345       if (info->rtfParam != rtfNoParam)
 346         fmt.yHeight = info->rtfParam*10;
 347       break;
 348   }
 349   if (fmt.dwMask) {
 350     ME_Style *style2;
 351     RTFFlushOutputBuffer(info);
 352     /* FIXME too slow ? how come ? */
 353     style2 = ME_ApplyStyle(info->style, &fmt);
 354     ME_ReleaseStyle(info->style);
 355     info->style = style2;
 356   }
 357 }
 358
 359 /* FIXME this function doesn't get any information about context of the RTF tag, which is very bad,
 360    the same tags mean different things in different contexts */
 361 void ME_RTFParAttrHook(RTF_Info *info)
 362 {
 363   PARAFORMAT2 fmt;
 364   fmt.cbSize = sizeof(fmt);
 365   fmt.dwMask = 0;
 366
 367   switch(info->rtfMinor)
 368   {
 369   case rtfParDef: /* I'm not 100% sure what does it do, but I guess it restores default paragraph attributes */
 370     fmt.dwMask = PFM_ALIGNMENT | PFM_TABSTOPS | PFM_OFFSET | PFM_STARTINDENT;
 371     fmt.wAlignment = PFA_LEFT;
 372     fmt.cTabCount = 0;
 373     fmt.dxOffset = fmt.dxStartIndent = 0;
 374     break;
 375   case rtfFirstIndent:
 376     ME_GetSelectionParaFormat(info->editor, &fmt);
 377     fmt.dwMask = PFM_STARTINDENT;
 378     fmt.dxStartIndent = info->rtfParam + fmt.dxOffset;
 379     break;
 380   case rtfLeftIndent:
 381   {
 382     int first, left;
 383     ME_GetSelectionParaFormat(info->editor, &fmt);
 384     first = fmt.dxStartIndent;
 385     left = info->rtfParam;
 386     fmt.dwMask = PFM_STARTINDENT|PFM_OFFSET;
 387     fmt.dxStartIndent = first + left;
 388     fmt.dxOffset = -first;
 389     break;
 390   }
 391   case rtfRightIndent:
 392     fmt.dwMask = PFM_RIGHTINDENT;
 393     fmt.dxRightIndent = info->rtfParam;
 394     break;
 395   case rtfQuadLeft:
 396   case rtfQuadJust:
 397     fmt.dwMask = PFM_ALIGNMENT;
 398     fmt.wAlignment = PFA_LEFT;
 399     break;
 400   case rtfQuadRight:
 401     fmt.dwMask = PFM_ALIGNMENT;
 402     fmt.wAlignment = PFA_RIGHT;
 403     break;
 404   case rtfQuadCenter:
 405     fmt.dwMask = PFM_ALIGNMENT;
 406     fmt.wAlignment = PFA_CENTER;
 407     break;
 408   case rtfTabPos:
 409     ME_GetSelectionParaFormat(info->editor, &fmt);
 410     if (!(fmt.dwMask & PFM_TABSTOPS))
 411     {
 412       fmt.dwMask |= PFM_TABSTOPS;
 413       fmt.cTabCount = 0;
 414     }
 415     if (fmt.cTabCount < MAX_TAB_STOPS)
 416       fmt.rgxTabs[fmt.cTabCount++] = info->rtfParam;
 417     break;
 418   }
 419   if (fmt.dwMask) {
 420     RTFFlushOutputBuffer(info);
 421     /* FIXME too slow ? how come ?*/
 422     ME_SetSelectionParaFormat(info->editor, &fmt);
 423   }
 424 }
 425
 426 void ME_RTFReadHook(RTF_Info *info) {
 427   switch(info->rtfClass)
 428   {
 429     case rtfGroup:
 430       switch(info->rtfMajor)
 431       {
 432         case rtfBeginGroup:
 433           if (info->stackTop < maxStack) {
 434             memcpy(&info->stack[info->stackTop].fmt, &info->style->fmt, sizeof(CHARFORMAT2W));
 435             info->stack[info->stackTop].codePage = info->codePage;
 436             info->stack[info->stackTop].unicodeLength = info->unicodeLength;
 437           }
 438           info->stackTop++;
 439           break;
 440         case rtfEndGroup:
 441         {
 442           ME_Style *s;
 443           RTFFlushOutputBuffer(info);
 444           info->stackTop--;
 445           /* FIXME too slow ? how come ? */
 446           s = ME_ApplyStyle(info->style, &info->stack[info->stackTop].fmt);
 447           ME_ReleaseStyle(info->style);
 448           info->style = s;
 449           info->codePage = info->stack[info->stackTop].codePage;
 450           info->unicodeLength = info->stack[info->stackTop].unicodeLength;
 451           break;
 452         }
 453       }
 454       break;
 455     case rtfControl:
 456       switch(info->rtfMajor)
 457       {
 458         case rtfCharAttr:
 459           ME_RTFCharAttrHook(info);
 460           break;
 461         case rtfParAttr:
 462           ME_RTFParAttrHook(info);
 463           break;
 464       }
 465       break;
 466   }
 467 }
 468
 469 void
 470 ME_StreamInFill(ME_InStream *stream)
 471 {
 472   stream->editstream->dwError = stream->editstream->pfnCallback(stream->editstream->dwCookie,
 473                                                                 stream->buffer,
 474                                                                 sizeof(stream->buffer),
 475                                                                 &stream->dwSize);
 476   stream->dwUsed = 0;
 477 }
 478
 479 static LRESULT ME_StreamIn(ME_TextEditor *editor, DWORD format, EDITSTREAM *stream)
 480 {
 481   RTF_Info parser;
 482   ME_Style *style;
 483   int from, to, to2, nUndoMode;
 484   ME_UndoItem *pUI;
 485   int nEventMask = editor->nEventMask;
 486   ME_InStream inStream;
 487
 488   TRACE("%p %p\n", stream, editor->hWnd);
 489   editor->nEventMask = 0;
 490
 491   ME_GetSelection(editor, &from, &to);
 492   if (format & SFF_SELECTION) {
 493     style = ME_GetSelectionInsertStyle(editor);
 494
 495     ME_InternalDeleteText(editor, from, to-from);
 496   }
 497   else {
 498     style = editor->pBuffer->pDefaultStyle;
 499     ME_AddRefStyle(style);
 500     SendMessageA(editor->hWnd, EM_SETSEL, 0, 0);
 501     ME_InternalDeleteText(editor, 0, ME_GetTextLength(editor));
 502     from = to = 0;
 503     ME_ClearTempStyle(editor);
 504     /* FIXME restore default paragraph formatting ! */
 505   }
 506
 507   nUndoMode = editor->nUndoMode;
 508   editor->nUndoMode = umIgnore;
 509
 510   inStream.editstream = stream;
 511   inStream.editstream->dwError = 0;
 512   inStream.dwSize = 0;
 513   inStream.dwUsed = 0;
 514
 515   if (format & SF_RTF)
 516   {
 517     /* Check if it's really RTF, and if it is not, use plain text */
 518     ME_StreamInFill(&inStream);
 519     if (!inStream.editstream->dwError)
 520     {
 521       if (strncmp(inStream.buffer, "{\\rtf1", 6) && strncmp(inStream.buffer, "{\\urtf", 6))
 522       {
 523         format &= ~SF_RTF;
 524         format |= SF_TEXT;
 525       }
 526     }
 527   }
 528
 529   if (!inStream.editstream->dwError)
 530   {
 531     if (format & SF_RTF) {
 532       /* setup the RTF parser */
 533       memset(&parser, 0, sizeof parser);
 534       RTFSetEditStream(&parser, &inStream);
 535       parser.rtfFormat = format&(SF_TEXT|SF_RTF);
 536       parser.hwndEdit = editor->hWnd;
 537       parser.editor = editor;
 538       parser.style = style;
 539       WriterInit(&parser);
 540       RTFInit(&parser);
 541       RTFSetReadHook(&parser, ME_RTFReadHook);
 542       BeginFile(&parser);
 543
 544       /* do the parsing */
 545       RTFRead(&parser);
 546       RTFFlushOutputBuffer(&parser);
 547       RTFDestroy(&parser);
 548
 549       style = parser.style;
 550     }
 551     else if (format & SF_TEXT)
 552       ME_StreamInText(editor, format, &inStream, style);
 553     else
 554       ERR("EM_STREAMIN without SF_TEXT or SF_RTF\n");
 555     ME_GetSelection(editor, &to, &to2);
 556     /* put the cursor at the top */
 557     if (!(format & SFF_SELECTION))
 558       SendMessageA(editor->hWnd, EM_SETSEL, 0, 0);
 559     else
 560     {
 561       /* FIXME where to put cursor now ? */
 562     }
 563   }
 564
 565   editor->nUndoMode = nUndoMode;
 566   pUI = ME_AddUndoItem(editor, diUndoDeleteRun, NULL);
 567   TRACE("from %d to %d\n", from, to);
 568   if (pUI && from < to)
 569   {
 570     pUI->nStart = from;
 571     pUI->nLen = to-from;
 572   }
 573   ME_CommitUndo(editor);
 574   ME_ReleaseStyle(style);
 575   editor->nEventMask = nEventMask;
 576   InvalidateRect(editor->hWnd, NULL, TRUE);
 577   ME_UpdateRepaint(editor);
 578   if (!(format & SFF_SELECTION)) {
 579     ME_ClearTempStyle(editor);
 580   }
 581   ME_MoveCaret(editor);
 582   ME_SendSelChange(editor);
 583
 584   return 0;
 585 }
 586
 587
 588 ME_DisplayItem *
 589 ME_FindItemAtOffset(ME_TextEditor *editor, ME_DIType nItemType, int nOffset, int *nItemOffset)
 590 {
 591   ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
 592
 593   while (item && item->member.para.next_para->member.para.nCharOfs <= nOffset)
 594     item = ME_FindItemFwd(item, diParagraph);
 595
 596   if (!item)
 597     return item;
 598
 599   nOffset -= item->member.para.nCharOfs;
 600   if (nItemType == diParagraph) {
 601     if (nItemOffset)
 602       *nItemOffset = nOffset;
 603     return item;
 604   }
 605
 606   do {
 607     item = ME_FindItemFwd(item, diRun);
 608   } while (item && (item->member.run.nCharOfs + ME_StrLen(item->member.run.strText) <= nOffset));
 609   if (item) {
 610     nOffset -= item->member.run.nCharOfs;
 611     if (nItemOffset)
 612       *nItemOffset = nOffset;
 613   }
 614   return item;
 615 }
 616
 617
 618 ME_TextEditor *ME_MakeEditor(HWND hWnd) {
 619   ME_TextEditor *ed = ALLOC_OBJ(ME_TextEditor);
 620   HDC hDC;
 621   int i;
 622   ed->hWnd = hWnd;
 623   ed->pBuffer = ME_MakeText();
 624   hDC = GetDC(hWnd);
 625   ME_MakeFirstParagraph(hDC, ed->pBuffer);
 626   ReleaseDC(hWnd, hDC);
 627   ed->bCaretShown = FALSE;
 628   ed->nCursors = 3;
 629   ed->pCursors = ALLOC_N_OBJ(ME_Cursor, ed->nCursors);
 630   ed->pCursors[0].pRun = ME_FindItemFwd(ed->pBuffer->pFirst, diRun);
 631   ed->pCursors[0].nOffset = 0;
 632   ed->pCursors[1].pRun = ME_FindItemFwd(ed->pBuffer->pFirst, diRun);
 633   ed->pCursors[1].nOffset = 0;
 634   ed->nLastTotalLength = ed->nTotalLength = 0;
 635   ed->nUDArrowX = -1;
 636   ed->nSequence = 0;
 637   ed->rgbBackColor = -1;
 638   ed->bCaretAtEnd = FALSE;
 639   ed->nEventMask = 0;
 640   ed->nModifyStep = 0;
 641   ed->pUndoStack = ed->pRedoStack = NULL;
 642   ed->nUndoMode = umAddToUndo;
 643   ed->nParagraphs = 1;
 644   ed->nLastSelStart = ed->nLastSelEnd = 0;
 645   ed->nScrollPosY = 0;
 646   for (i=0; i<HFONT_CACHE_SIZE; i++)
 647   {
 648     ed->pFontCache[i].nRefs = 0;
 649     ed->pFontCache[i].nAge = 0;
 650     ed->pFontCache[i].hFont = NULL;
 651   }
 652   ME_CheckCharOffsets(ed);
 653   return ed;
 654 }
 655
 656 typedef struct tagME_GlobalDestStruct
 657 {
 658   HGLOBAL hData;
 659   int nLength;
 660 } ME_GlobalDestStruct;
 661
 662 static DWORD CALLBACK ME_AppendToHGLOBAL(DWORD_PTR dwCookie, LPBYTE lpBuff, LONG cb, LONG *pcb)
 663 {
 664   ME_GlobalDestStruct *pData = (ME_GlobalDestStruct *)dwCookie;
 665   int nMaxSize;
 666   BYTE *pDest;
 667
 668   nMaxSize = GlobalSize(pData->hData);
 669   if (pData->nLength+cb+1 >= cb)
 670   {
 671     /* round up to 2^17 */
 672     int nNewSize = (((nMaxSize+cb+1)|0x1FFFF)+1) & 0xFFFE0000;
 673     pData->hData = GlobalReAlloc(pData->hData, nNewSize, 0);
 674   }
 675   pDest = (BYTE *)GlobalLock(pData->hData);
 676   memcpy(pDest + pData->nLength, lpBuff, cb);
 677   pData->nLength += cb;
 678   pDest[pData->nLength] = '\0';
 679   GlobalUnlock(pData->hData);
 680   *pcb = cb;
 681
 682   return 0;
 683 }
 684
 685 static DWORD CALLBACK ME_ReadFromHGLOBALUnicode(DWORD_PTR dwCookie, LPBYTE lpBuff, LONG cb, LONG *pcb)
 686 {
 687   ME_GlobalDestStruct *pData = (ME_GlobalDestStruct *)dwCookie;
 688   int i;
 689   WORD *pSrc, *pDest;
 690
 691   cb = cb >> 1;
 692   pDest = (WORD *)lpBuff;
 693   pSrc = (WORD *)GlobalLock(pData->hData);
 694   for (i = 0; i<cb && pSrc[pData->nLength+i]; i++) {
 695     pDest[i] = pSrc[pData->nLength+i];
 696   }
 697   pData->nLength += i;
 698   *pcb = 2*i;
 699   GlobalUnlock(pData->hData);
 700   return 0;
 701 }
 702
 703 static DWORD CALLBACK ME_ReadFromHGLOBALRTF(DWORD_PTR dwCookie, LPBYTE lpBuff, LONG cb, LONG *pcb)
 704 {
 705   ME_GlobalDestStruct *pData = (ME_GlobalDestStruct *)dwCookie;
 706   int i;
 707   BYTE *pSrc, *pDest;
 708
 709   pDest = lpBuff;
 710   pSrc = (BYTE *)GlobalLock(pData->hData);
 711   for (i = 0; i<cb && pSrc[pData->nLength+i]; i++) {
 712     pDest[i] = pSrc[pData->nLength+i];
 713   }
 714   pData->nLength += i;
 715   *pcb = i;
 716   GlobalUnlock(pData->hData);
 717   return 0;
 718 }
 719
 720 void ME_DestroyEditor(ME_TextEditor *editor)
 721 {
 722   ME_DisplayItem *pFirst = editor->pBuffer->pFirst;
 723   ME_DisplayItem *p = pFirst, *pNext = NULL;
 724   int i;
 725
 726   ME_ClearTempStyle(editor);
 727   ME_EmptyUndoStack(editor);
 728   while(p) {
 729     pNext = p->next;
 730     ME_DestroyDisplayItem(p);
 731     p = pNext;
 732   }
 733   ME_ReleaseStyle(editor->pBuffer->pDefaultStyle);
 734   for (i=0; i<HFONT_CACHE_SIZE; i++)
 735   {
 736     if (editor->pFontCache[i].hFont)
 737       DeleteObject(editor->pFontCache[i].hFont);
 738   }
 739
 740   FREE_OBJ(editor);
 741 }
 742
 743 #define UNSUPPORTED_MSG(e) \
 744   case e: \
 745     FIXME(#e ": stub\n"); \
 746     return DefWindowProcW(hWnd, msg, wParam, lParam);
 747
 748 /******************************************************************
 749  *        RichEditANSIWndProc (RICHED20.10)
 750  */
 751 LRESULT WINAPI RichEditANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) {
 752   HDC hDC;
 753   PAINTSTRUCT ps;
 754   SCROLLINFO si;
 755   ME_TextEditor *editor = (ME_TextEditor *)GetWindowLongW(hWnd, 0);
 756   TRACE("msg %d %08x %08lx\n", msg, wParam, lParam);
 757   switch(msg) {
 758
 759   UNSUPPORTED_MSG(EM_AUTOURLDETECT)
 760   UNSUPPORTED_MSG(EM_CHARFROMPOS)
 761   UNSUPPORTED_MSG(EM_DISPLAYBAND)
 762   UNSUPPORTED_MSG(EM_EXLIMITTEXT)
 763   UNSUPPORTED_MSG(EM_EXLINEFROMCHAR)
 764   UNSUPPORTED_MSG(EM_FINDTEXT)
 765   UNSUPPORTED_MSG(EM_FINDTEXTEX)
 766   UNSUPPORTED_MSG(EM_FINDWORDBREAK)
 767   UNSUPPORTED_MSG(EM_FMTLINES)
 768   UNSUPPORTED_MSG(EM_FORMATRANGE)
 769   UNSUPPORTED_MSG(EM_GETFIRSTVISIBLELINE)
 770   UNSUPPORTED_MSG(EM_GETIMECOMPMODE)
 771   /* UNSUPPORTED_MSG(EM_GETIMESTATUS) missing in Wine headers */
 772   UNSUPPORTED_MSG(EM_GETLANGOPTIONS)
 773   UNSUPPORTED_MSG(EM_GETLIMITTEXT)
 774   UNSUPPORTED_MSG(EM_GETLINE)
 775   UNSUPPORTED_MSG(EM_GETLINECOUNT)
 776   /* UNSUPPORTED_MSG(EM_GETOLEINTERFACE) separate stub */
 777   UNSUPPORTED_MSG(EM_GETOPTIONS)
 778   UNSUPPORTED_MSG(EM_GETRECT)
 779   UNSUPPORTED_MSG(EM_GETREDONAME)
 780   UNSUPPORTED_MSG(EM_GETTEXTMODE)
 781   UNSUPPORTED_MSG(EM_GETUNDONAME)
 782   UNSUPPORTED_MSG(EM_GETWORDBREAKPROC)
 783   UNSUPPORTED_MSG(EM_GETWORDBREAKPROCEX)
 784   UNSUPPORTED_MSG(EM_HIDESELECTION)
 785   UNSUPPORTED_MSG(EM_LIMITTEXT) /* also known as EM_SETLIMITTEXT */
 786   UNSUPPORTED_MSG(EM_LINEFROMCHAR)
 787   UNSUPPORTED_MSG(EM_LINEINDEX)
 788   UNSUPPORTED_MSG(EM_LINELENGTH)
 789   UNSUPPORTED_MSG(EM_LINESCROLL)
 790   UNSUPPORTED_MSG(EM_PASTESPECIAL)
 791 /*  UNSUPPORTED_MSG(EM_POSFROMCHARS) missing in Wine headers */
 792   UNSUPPORTED_MSG(EM_REQUESTRESIZE)
 793   UNSUPPORTED_MSG(EM_SCROLL)
 794   UNSUPPORTED_MSG(EM_SCROLLCARET)
 795   UNSUPPORTED_MSG(EM_SELECTIONTYPE)
 796   UNSUPPORTED_MSG(EM_SETLANGOPTIONS)
 797   UNSUPPORTED_MSG(EM_SETOLECALLBACK)
 798   UNSUPPORTED_MSG(EM_SETOPTIONS)
 799   UNSUPPORTED_MSG(EM_SETRECT)
 800   UNSUPPORTED_MSG(EM_SETRECTNP)
 801   UNSUPPORTED_MSG(EM_SETTARGETDEVICE)
 802   UNSUPPORTED_MSG(EM_SETTEXTMODE)
 803   UNSUPPORTED_MSG(EM_SETUNDOLIMIT)
 804   UNSUPPORTED_MSG(EM_SETWORDBREAKPROC)
 805   UNSUPPORTED_MSG(EM_SETWORDBREAKPROCEX)
 806   UNSUPPORTED_MSG(WM_SETFONT)
 807   UNSUPPORTED_MSG(WM_STYLECHANGING)
 808   UNSUPPORTED_MSG(WM_STYLECHANGED)
 809 /*  UNSUPPORTED_MSG(WM_UNICHAR) FIXME missing in Wine headers */
 810
 811 /* Messages specific to Richedit controls */
 812
 813   case EM_STREAMIN:
 814    return ME_StreamIn(editor, wParam, (EDITSTREAM*)lParam);
 815   case EM_STREAMOUT:
 816    return ME_StreamOut(editor, wParam, (EDITSTREAM *)lParam);
 817   case WM_GETDLGCODE:
 818   {
 819     UINT code = DLGC_WANTCHARS|DLGC_WANTARROWS;
 820     if (GetWindowLongW(hWnd, GWL_STYLE)&ES_WANTRETURN)
 821       code |= 0; /* FIXME what can we do here ? ask for messages and censor them ? */
 822     return code;
 823   }
 824   case WM_NCCREATE:
 825   {
 826     CREATESTRUCTW *pcs = (CREATESTRUCTW *)lParam;
 827     editor = ME_MakeEditor(hWnd);
 828     SetWindowLongW(hWnd, 0, (long)editor);
 829     pcs = 0; /* ignore */
 830     return TRUE;
 831   }
 832   case EM_EMPTYUNDOBUFFER:
 833     ME_EmptyUndoStack(editor);
 834     return 0;
 835   case EM_GETSEL:
 836   {
 837     ME_GetSelection(editor, (int *)wParam, (int *)lParam);
 838     if (!((wParam|lParam) & 0xFFFF0000))
 839       return (lParam<<16)|wParam;
 840     return -1;
 841   }
 842   case EM_EXGETSEL:
 843   {
 844     CHARRANGE *pRange = (CHARRANGE *)lParam;
 845     ME_GetSelection(editor, (int *)&pRange->cpMin, (int *)&pRange->cpMax);
 846     return 0;
 847   }
 848   case EM_CANUNDO:
 849     return editor->pUndoStack != NULL;
 850   case EM_CANREDO:
 851     return editor->pRedoStack != NULL;
 852   case EM_UNDO:
 853     ME_Undo(editor);
 854     return 0;
 855   case EM_REDO:
 856     ME_Redo(editor);
 857     return 0;
 858   case EM_SETSEL:
 859   {
 860     ME_SetSelection(editor, wParam, lParam);
 861     ME_Repaint(editor);
 862     ME_SendSelChange(editor);
 863     return 0;
 864   }
 865   case EM_EXSETSEL:
 866   {
 867     CHARRANGE *pRange = (CHARRANGE *)lParam;
 868     ME_SetSelection(editor, pRange->cpMin, pRange->cpMax);
 869     /* FIXME optimize */
 870     ME_Repaint(editor);
 871     ME_SendSelChange(editor);
 872     return 0;
 873   }
 874   case EM_SETBKGNDCOLOR:
 875   {
 876     LRESULT lColor = ME_GetBackColor(editor);
 877     if (wParam)
 878       editor->rgbBackColor = -1;
 879     else
 880       editor->rgbBackColor = lParam;
 881     InvalidateRect(hWnd, NULL, TRUE);
 882     UpdateWindow(hWnd);
 883     return lColor;
 884   }
 885   case EM_GETMODIFY:
 886     return editor->nModifyStep == 0 ? 0 : 1;
 887   case EM_SETMODIFY:
 888   {
 889     if (wParam)
 890       editor->nModifyStep = 0x80000000;
 891     else
 892       editor->nModifyStep = 0;
 893
 894     return 0;
 895   }
 896   case EM_SETREADONLY:
 897   {
 898     long nStyle = GetWindowLongW(hWnd, GWL_STYLE);
 899     if (wParam)
 900       nStyle |= ES_READONLY;
 901     else
 902       nStyle &= ~ES_READONLY;
 903     SetWindowLongW(hWnd, GWL_STYLE, nStyle);
 904     ME_Repaint(editor);
 905     return 0;
 906   }
 907   case EM_SETEVENTMASK:
 908     editor->nEventMask = lParam;
 909     return 0;
 910   case EM_GETEVENTMASK:
 911     return editor->nEventMask;
 912   case EM_SETCHARFORMAT:
 913   {
 914     CHARFORMAT2W buf, *p;
 915     BOOL bRepaint = TRUE;
 916     p = ME_ToCF2W(&buf, (CHARFORMAT2W *)lParam);
 917     if (!wParam)
 918       ME_SetDefaultCharFormat(editor, p);
 919     else if (wParam == (SCF_WORD | SCF_SELECTION))
 920       FIXME("word selection not supported\n");
 921     else if (wParam == SCF_ALL)
 922       ME_SetCharFormat(editor, 0, ME_GetTextLength(editor), p);
 923     else {
 924       int from, to;
 925       ME_GetSelection(editor, &from, &to);
 926       bRepaint = (from != to);
 927       ME_SetSelectionCharFormat(editor, p);
 928     }
 929     ME_CommitUndo(editor);
 930     if (bRepaint)
 931       ME_UpdateRepaint(editor);
 932     return 0;
 933   }
 934   case EM_GETCHARFORMAT:
 935   {
 936     CHARFORMAT2W tmp;
 937     tmp.cbSize = sizeof(tmp);
 938     if (!wParam)
 939       ME_GetDefaultCharFormat(editor, &tmp);
 940     else
 941       ME_GetSelectionCharFormat(editor, &tmp);
 942     ME_CopyToCFAny((CHARFORMAT2W *)lParam, &tmp);
 943     return 0;
 944   }
 945   case EM_SETPARAFORMAT:
 946     ME_SetSelectionParaFormat(editor, (PARAFORMAT2 *)lParam);
 947     ME_UpdateRepaint(editor);
 948     ME_CommitUndo(editor);
 949     return 0;
 950   case EM_GETPARAFORMAT:
 951     ME_GetSelectionParaFormat(editor, (PARAFORMAT2 *)lParam);
 952     return 0;
 953   case WM_CLEAR:
 954   {
 955     int from, to;
 956     ME_GetSelection(editor, &from, &to);
 957     ME_InternalDeleteText(editor, from, to-from);
 958     ME_CommitUndo(editor);
 959     ME_UpdateRepaint(editor);
 960     return 0;
 961   }
 962   case EM_REPLACESEL:
 963   {
 964     int from, to;
 965     ME_Style *style;
 966     LPWSTR wszText = ME_ToUnicode(hWnd, (void *)lParam);
 967     size_t len = lstrlenW(wszText);
 968     TRACE("EM_REPLACESEL - %s\n", debugstr_w(wszText));
 969
 970     ME_GetSelection(editor, &from, &to);
 971     style = ME_GetSelectionInsertStyle(editor);
 972     ME_InternalDeleteText(editor, from, to-from);
 973     ME_InsertTextFromCursor(editor, 0, wszText, len, style);
 974     ME_ReleaseStyle(style);
 975     ME_EndToUnicode(hWnd, wszText);
 976     /* drop temporary style if line end */
 977     /* FIXME question: does abc\n mean: put abc, clear temp style, put \n? (would require a change) */
 978     if (len>0 && wszText[len-1] == '\n')
 979       ME_ClearTempStyle(editor);
 980
 981     ME_CommitUndo(editor);
 982     if (!wParam)
 983       ME_EmptyUndoStack(editor);
 984     ME_UpdateRepaint(editor);
 985     return 0;
 986   }
 987   case WM_SETTEXT:
 988   {
 989     LPWSTR wszText = ME_ToUnicode(hWnd, (void *)lParam);
 990     TRACE("WM_SETTEXT - %s\n", (char *)(wszText)); /* debugstr_w() */
 991     ME_InternalDeleteText(editor, 0, ME_GetTextLength(editor));
 992     /* uses default style! */
 993     ME_InsertTextFromCursor(editor, 0, wszText, -1, editor->pBuffer->pDefaultStyle);
 994     ME_EndToUnicode(hWnd, wszText);
 995     ME_CommitUndo(editor);
 996     ME_EmptyUndoStack(editor);
 997     ME_UpdateRepaint(editor);
 998     return 0;
 999   }
1000   case EM_CANPASTE:
1001   {
1002     UINT nRTFFormat = RegisterClipboardFormatA("Rich Text Format");
1003     if (IsClipboardFormatAvailable(nRTFFormat))
1004       return TRUE;
1005     if (IsClipboardFormatAvailable(CF_UNICODETEXT))
1006       return TRUE;
1007     return FALSE;
1008   }
1009   case WM_PASTE:
1010   {
1011     DWORD dwFormat = 0;
1012     EDITSTREAM es;
1013     ME_GlobalDestStruct gds;
1014     UINT nRTFFormat = RegisterClipboardFormatA("Rich Text Format");
1015     UINT cf = 0;
1016
1017     if (IsClipboardFormatAvailable(nRTFFormat))
1018       cf = nRTFFormat, dwFormat = SF_RTF;
1019     else if (IsClipboardFormatAvailable(CF_UNICODETEXT))
1020       cf = CF_UNICODETEXT, dwFormat = SF_TEXT|SF_UNICODE;
1021     else
1022       return 0;
1023
1024     if (!OpenClipboard(hWnd))
1025       return 0;
1026     gds.hData = GetClipboardData(cf);
1027     gds.nLength = 0;
1028     es.dwCookie = (DWORD)&gds;
1029     es.pfnCallback = dwFormat == SF_RTF ? ME_ReadFromHGLOBALRTF : ME_ReadFromHGLOBALUnicode;
1030     SendMessageW(hWnd, EM_STREAMIN, dwFormat|SFF_SELECTION, (LPARAM)&es);
1031
1032     CloseClipboard();
1033     return 0;
1034   }
1035   case WM_CUT:
1036   case WM_COPY:
1037   {
1038     int from, to, pars;
1039     WCHAR *data;
1040     HANDLE hData;
1041     EDITSTREAM es;
1042     ME_GlobalDestStruct gds;
1043
1044     if (!OpenClipboard(hWnd))
1045       return 0;
1046
1047     EmptyClipboard();
1048     ME_GetSelection(editor, &from, &to);
1049     pars = ME_CountParagraphsBetween(editor, from, to);
1050     hData = GlobalAlloc(GMEM_MOVEABLE, sizeof(WCHAR)*(to-from+pars+1));
1051     data = (WCHAR *)GlobalLock(hData);
1052     ME_GetTextW(editor, data, from, to-from, TRUE);
1053     GlobalUnlock(hData);
1054
1055     gds.hData = GlobalAlloc(GMEM_MOVEABLE, 0);
1056     gds.nLength = 0;
1057     es.dwCookie = (DWORD)&gds;
1058     es.pfnCallback = ME_AppendToHGLOBAL;
1059     SendMessageW(hWnd, EM_STREAMOUT, SFF_SELECTION|SF_RTF, (LPARAM)&es);
1060     GlobalReAlloc(gds.hData, gds.nLength+1, 0);
1061
1062     SetClipboardData(CF_UNICODETEXT, hData);
1063     SetClipboardData(RegisterClipboardFormatA("Rich Text Format"), gds.hData);
1064
1065     CloseClipboard();
1066     if (msg == WM_CUT)
1067     {
1068       ME_InternalDeleteText(editor, from, to-from);
1069       ME_CommitUndo(editor);
1070       ME_UpdateRepaint(editor);
1071     }
1072     return 0;
1073   }
1074   case WM_GETTEXTLENGTH:
1075     return ME_GetTextLength(editor);
1076   case WM_GETTEXT:
1077   {
1078     TEXTRANGEW tr; /* W and A differ only by rng->lpstrText */
1079     tr.chrg.cpMin = 0;
1080     tr.chrg.cpMax = wParam-1;
1081     tr.lpstrText = (WCHAR *)lParam;
1082     return RichEditANSIWndProc(hWnd, EM_GETTEXTRANGE, 0, (LPARAM)&tr);
1083   }
1084   case EM_GETSELTEXT:
1085   {
1086     int from, to;
1087     TEXTRANGEW tr; /* W and A differ only by rng->lpstrText */
1088     ME_GetSelection(editor, &from, &to);
1089     tr.chrg.cpMin = from;
1090     tr.chrg.cpMax = to;
1091     tr.lpstrText = (WCHAR *)lParam;
1092     return RichEditANSIWndProc(hWnd, EM_GETTEXTRANGE, 0, (LPARAM)&tr);
1093   }
1094   case EM_GETTEXTRANGE:
1095   {
1096     TEXTRANGEW *rng = (TEXTRANGEW *)lParam;
1097     if (IsWindowUnicode(hWnd))
1098       return ME_GetTextW(editor, rng->lpstrText, rng->chrg.cpMin, rng->chrg.cpMax-rng->chrg.cpMin, FALSE);
1099     else
1100     {
1101       int nLen = rng->chrg.cpMax-rng->chrg.cpMin;
1102       WCHAR *p = ALLOC_N_OBJ(WCHAR, nLen+1);
1103       int nChars = ME_GetTextW(editor, p, rng->chrg.cpMin, nLen, FALSE);
1104       /* FIXME this is a potential security hole (buffer overrun)
1105          if you know more about wchar->mbyte conversion please explain
1106       */
1107       WideCharToMultiByte(CP_ACP, 0, p, nChars+1, (char *)rng->lpstrText, nLen+1, NULL, NULL);
1108       FREE_OBJ(p);
1109       return nChars;
1110     }
1111     return ME_GetTextW(editor, rng->lpstrText, rng->chrg.cpMin, rng->chrg.cpMax-rng->chrg.cpMin, FALSE);
1112   }
1113   case WM_CREATE:
1114     ME_CommitUndo(editor);
1115     ME_WrapMarkedParagraphs(editor);
1116     ME_MoveCaret(editor);
1117     return 0;
1118   case WM_DESTROY:
1119     ME_DestroyEditor(editor);
1120     SetWindowLongW(hWnd, 0, 0);
1121     return 0;
1122   case WM_LBUTTONDOWN:
1123     SetFocus(hWnd);
1124     ME_LButtonDown(editor, (short)LOWORD(lParam), (short)HIWORD(lParam));
1125     SetCapture(hWnd);
1126     break;
1127   case WM_MOUSEMOVE:
1128     if (GetCapture() == hWnd)
1129       ME_MouseMove(editor, (short)LOWORD(lParam), (short)HIWORD(lParam));
1130     break;
1131   case WM_LBUTTONUP:
1132     if (GetCapture() == hWnd)
1133       ReleaseCapture();
1134     break;
1135   case WM_PAINT:
1136     hDC = BeginPaint(hWnd, &ps);
1137     ME_PaintContent(editor, hDC, FALSE, &ps.rcPaint);
1138     EndPaint(hWnd, &ps);
1139     break;
1140   case WM_SETFOCUS:
1141     ME_ShowCaret(editor);
1142     ME_SendOldNotify(editor, EN_SETFOCUS);
1143     return 0;
1144   case WM_KILLFOCUS:
1145     ME_HideCaret(editor);
1146     ME_SendOldNotify(editor, EN_KILLFOCUS);
1147     return 0;
1148   case WM_ERASEBKGND:
1149   {
1150     HDC hDC = (HDC)wParam;
1151     RECT rc;
1152     COLORREF rgbBG = ME_GetBackColor(editor);
1153     if (GetUpdateRect(hWnd,&rc,TRUE))
1154     {
1155       HBRUSH hbr = CreateSolidBrush(rgbBG);
1156       FillRect(hDC, &rc, hbr);
1157       DeleteObject(hbr);
1158     }
1159     return 1;
1160   }
1161   case WM_COMMAND:
1162     TRACE("editor wnd command = %d\n", LOWORD(wParam));
1163     return 0;
1164   case WM_KEYDOWN:
1165     if (ME_ArrowKey(editor, LOWORD(wParam), GetKeyState(VK_CONTROL)<0)) {
1166       ME_CommitUndo(editor);
1167       ME_EnsureVisible(editor, editor->pCursors[0].pRun);
1168       HideCaret(hWnd);
1169       ME_MoveCaret(editor);
1170       ShowCaret(hWnd);
1171       return 0;
1172     }
1173     if (GetKeyState(VK_CONTROL)<0)
1174     {
1175       if (LOWORD(wParam)=='W')
1176       {
1177         CHARFORMAT2W chf;
1178         char buf[2048];
1179         ME_GetSelectionCharFormat(editor, &chf);
1180         ME_DumpStyleToBuf(&chf, buf);
1181         MessageBoxA(NULL, buf, "Style dump", MB_OK);
1182       }
1183       if (LOWORD(wParam)=='Q')
1184       {
1185         ME_CheckCharOffsets(editor);
1186       }
1187     }
1188     goto do_default;
1189   case WM_CHAR:
1190   {
1191     WCHAR wstr;
1192     if (GetWindowLongW(editor->hWnd, GWL_STYLE) & ES_READONLY) {
1193       MessageBeep(MB_ICONERROR);
1194       return 0; /* FIXME really 0 ? */
1195     }
1196     wstr = LOWORD(wParam);
1197     if (((unsigned)wstr)>=' ' || wstr=='\r' || wstr=='\t') {
1198       /* FIXME maybe it would make sense to call EM_REPLACESEL instead ? */
1199       ME_Style *style = ME_GetInsertStyle(editor, 0);
1200       ME_SaveTempStyle(editor);
1201       ME_InsertTextFromCursor(editor, 0, &wstr, 1, style);
1202       ME_ReleaseStyle(style);
1203       ME_CommitUndo(editor);
1204       ME_UpdateRepaint(editor);
1205     }
1206     return 0;
1207   }
1208   case WM_VSCROLL:
1209   {
1210     int nPos = editor->nScrollPosY;
1211     si.cbSize = sizeof(SCROLLINFO);
1212     si.fMask = SIF_PAGE|SIF_POS|SIF_RANGE|SIF_TRACKPOS;
1213     GetScrollInfo(hWnd, SB_VERT, &si);
1214     switch(LOWORD(wParam)) {
1215     case SB_LINEUP:
1216       nPos -= 24; /* FIXME follow the original */
1217       if (nPos<0) nPos = 0;
1218       break;
1219     case SB_LINEDOWN:
1220     {
1221       int nEnd = editor->nTotalLength - editor->sizeWindow.cy;
1222       nPos += 24; /* FIXME follow the original */
1223       if (nPos>=nEnd) nPos = nEnd;
1224       break;
1225     }
1226     case SB_PAGEUP:
1227       nPos -= editor->sizeWindow.cy;
1228       if (nPos<0) nPos = 0;
1229       break;
1230     case SB_PAGEDOWN:
1231       nPos += editor->sizeWindow.cy;
1232       if (nPos>=editor->nTotalLength) nPos = editor->nTotalLength-1;
1233       break;
1234     case SB_THUMBTRACK:
1235     case SB_THUMBPOSITION:
1236       nPos = si.nTrackPos;
1237       break;
1238     }
1239     if (nPos != editor->nScrollPosY) {
1240       ScrollWindow(hWnd, 0, editor->nScrollPosY-nPos, NULL, NULL);
1241       editor->nScrollPosY = nPos;
1242       SetScrollPos(hWnd, SB_VERT, nPos, TRUE);
1243       UpdateWindow(hWnd);
1244     }
1245     break;
1246   }
1247   case WM_MOUSEWHEEL:
1248   {
1249     int gcWheelDelta = 0, nPos = editor->nScrollPosY;
1250     UINT pulScrollLines;
1251
1252     SystemParametersInfoW(SPI_GETWHEELSCROLLLINES,0, &pulScrollLines, 0);
1253     gcWheelDelta -= GET_WHEEL_DELTA_WPARAM(wParam);
1254     if (abs(gcWheelDelta) >= WHEEL_DELTA && pulScrollLines)
1255       nPos += pulScrollLines * (gcWheelDelta / WHEEL_DELTA) * 8;
1256     if(nPos>=editor->nTotalLength)
1257       nPos = editor->nTotalLength - 1;
1258     if (nPos<0)
1259       nPos = 0;
1260     if (nPos != editor->nScrollPosY) {
1261       ScrollWindow(hWnd, 0, editor->nScrollPosY-nPos, NULL, NULL);
1262       editor->nScrollPosY = nPos;
1263       SetScrollPos(hWnd, SB_VERT, nPos, TRUE);
1264       UpdateWindow(hWnd);
1265     }
1266     break;
1267   }
1268   case WM_SIZE:
1269   {
1270     ME_MarkAllForWrapping(editor);
1271     ME_WrapMarkedParagraphs(editor);
1272     ME_UpdateScrollBar(editor);
1273     ME_Repaint(editor);
1274     return DefWindowProcW(hWnd, msg, wParam, lParam);
1275   }
1276   case EM_GETOLEINTERFACE:
1277   {
1278     LPVOID *ppvObj = (LPVOID*) lParam;
1279     FIXME("EM_GETOLEINTERFACE %p: stub\n", ppvObj);
1280     return CreateIRichEditOle(ppvObj);
1281   }
1282   default:
1283   do_default:
1284     return DefWindowProcW(hWnd, msg, wParam, lParam);
1285   }
1286   return 0L;
1287 }
1288
1289 /******************************************************************
1290  *        RichEdit10ANSIWndProc (RICHED20.9)
1291  */
1292 LRESULT WINAPI RichEdit10ANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
1293 {
1294   /* FIXME: this is NOT the same as 2.0 version */
1295   return RichEditANSIWndProc(hWnd, msg, wParam, lParam);
1296 }
1297
1298 void ME_SendOldNotify(ME_TextEditor *editor, int nCode)
1299 {
1300   HWND hWnd = editor->hWnd;
1301   SendMessageA(GetParent(hWnd), WM_COMMAND, (nCode<<16)|GetWindowLongW(hWnd, GWLP_ID), (LPARAM)hWnd);
1302 }
1303
1304 int ME_CountParagraphsBetween(ME_TextEditor *editor, int from, int to)
1305 {
1306   ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
1307   int i = 0;
1308
1309   while(item && item->member.para.next_para->member.para.nCharOfs <= from)
1310     item = item->member.para.next_para;
1311   if (!item)
1312     return 0;
1313   while(item && item->member.para.next_para->member.para.nCharOfs <= to) {
1314     item = item->member.para.next_para;
1315     i++;
1316   }
1317   return i;
1318 }
1319
1320
1321 int ME_GetTextW(ME_TextEditor *editor, WCHAR *buffer, int nStart, int nChars, int bCRLF)
1322 {
1323   ME_DisplayItem *item = ME_FindItemAtOffset(editor, diRun, nStart, &nStart);
1324   int nWritten = 0;
1325
1326   if (!item) {
1327     *buffer = L'\0';
1328     return 0;
1329   }
1330   assert(item);
1331
1332   if (nStart)
1333   {
1334     int nLen = ME_StrLen(item->member.run.strText) - nStart;
1335     if (nLen > nChars)
1336       nLen = nChars;
1337     CopyMemory(buffer, item->member.run.strText->szData + nStart, sizeof(WCHAR)*nLen);
1338     nChars -= nLen;
1339     nWritten += nLen;
1340     if (!nChars)
1341       return nWritten;
1342     buffer += nLen;
1343     nStart = 0;
1344     item = ME_FindItemFwd(item, diRun);
1345   }
1346
1347   while(nChars && item)
1348   {
1349     int nLen = ME_StrLen(item->member.run.strText);
1350     if (nLen > nChars)
1351       nLen = nChars;
1352
1353     if (item->member.run.nFlags & MERF_ENDPARA)
1354     {
1355       if (bCRLF) {
1356         *buffer++ = '\r';
1357         nWritten++;
1358       }
1359       *buffer = '\n';
1360       assert(nLen == 1);
1361     }
1362     else
1363       CopyMemory(buffer, item->member.run.strText->szData, sizeof(WCHAR)*nLen);
1364     nChars -= nLen;
1365     nWritten += nLen;
1366     buffer += nLen;
1367
1368     if (!nChars)
1369     {
1370       *buffer = L'\0';
1371       return nWritten;
1372     }
1373     item = ME_FindItemFwd(item, diRun);
1374   }
1375   *buffer = L'\0';
1376   return nWritten;
1377 }
1378
1379 static WCHAR wszClassName[] = {'R', 'i', 'c', 'h', 'E', 'd', 'i', 't', '2', '0', 'W', 0};
1380 static WCHAR wszClassName50[] = {'R', 'i', 'c', 'h', 'E', 'd', 'i', 't', '5', '0', 'W', 0};
1381
1382 void ME_RegisterEditorClass(HINSTANCE hInstance)
1383 {
1384   BOOL bResult;
1385   WNDCLASSW wcW;
1386   WNDCLASSA wcA;
1387
1388   wcW.style = CS_HREDRAW | CS_VREDRAW;
1389   wcW.lpfnWndProc = RichEditANSIWndProc;
1390   wcW.cbClsExtra = 0;
1391   wcW.cbWndExtra = 4;
1392   wcW.hInstance = NULL; /* hInstance would register DLL-local class */
1393   wcW.hIcon = NULL;
1394   wcW.hCursor = LoadCursorW(NULL, MAKEINTRESOURCEW(IDC_IBEAM));
1395   wcW.hbrBackground = (HBRUSH)GetStockObject(NULL_BRUSH);
1396   wcW.lpszMenuName = NULL;
1397   wcW.lpszClassName = wszClassName;
1398   bResult = RegisterClassW(&wcW);
1399   assert(bResult);
1400   wcW.lpszClassName = wszClassName50;
1401   bResult = RegisterClassW(&wcW);
1402   assert(bResult);
1403
1404   wcA.style = CS_HREDRAW | CS_VREDRAW;
1405   wcA.lpfnWndProc = RichEditANSIWndProc;
1406   wcA.cbClsExtra = 0;
1407   wcA.cbWndExtra = 4;
1408   wcA.hInstance = NULL; /* hInstance would register DLL-local class */
1409   wcA.hIcon = NULL;
1410   wcA.hCursor = LoadCursorW(NULL, MAKEINTRESOURCEW(IDC_IBEAM));
1411   wcA.hbrBackground = (HBRUSH)GetStockObject(NULL_BRUSH);
1412   wcA.lpszMenuName = NULL;
1413   wcA.lpszClassName = "RichEdit20A";
1414   bResult = RegisterClassA(&wcA);
1415   assert(bResult);
1416   wcA.lpszClassName = "RichEdit50A";
1417   bResult = RegisterClassA(&wcA);
1418   assert(bResult);
1419 }
1420
1421 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
1422 {
1423     TRACE("\n");
1424     switch (fdwReason)
1425     {
1426     case DLL_PROCESS_ATTACH:
1427       DisableThreadLibraryCalls(hinstDLL);
1428       me_heap = HeapCreate (0, 0x10000, 0);
1429       ME_RegisterEditorClass(hinstDLL);
1430       break;
1431
1432     case DLL_PROCESS_DETACH:
1433       UnregisterClassW(wszClassName, 0);
1434       UnregisterClassW(wszClassName50, 0);
1435       UnregisterClassA("RichEdit20A", 0);
1436       UnregisterClassA("RichEdit50A", 0);
1437       HeapDestroy (me_heap);
1438       me_heap = NULL;
1439       break;
1440     }
1441     return TRUE;
1442 }
1443
1444 /******************************************************************
1445  *        CreateTextServices (RICHED20.4)
1446  *
1447  * FIXME should be ITextHost instead of void*
1448  */
1449 HRESULT WINAPI CreateTextServices(IUnknown *punkOuter, void *pITextHost,
1450     IUnknown **ppUnk)
1451 {
1452   FIXME("stub\n");
1453   /* FIXME should support aggregation */
1454   if (punkOuter)
1455     return CLASS_E_NOAGGREGATION;
1456
1457   return E_FAIL; /* E_NOTIMPL isn't allowed by MSDN */
1458 }
1459
1460 /******************************************************************
1461  *        REExtendedRegisterClass (RICHED20.8)
1462  *
1463  * FIXME undocumented
1464  */
1465 void WINAPI REExtendedRegisterClass(void)
1466 {
1467   FIXME("stub\n");
1468 }