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_GETAUTOURLDETECT 2.0
  42   - EM_GETBIDIOPTIONS 3.0
  43   - EM_GETCHARFORMAT (partly done)
  44   - EM_GETEDITSTYLE
  45   + EM_GETEVENTMASK
  46   - EM_GETFIRSTVISIBLELINE
  47   - EM_GETIMECOLOR 1.0asian
  48   - EM_GETIMECOMPMODE 2.0
  49   - EM_GETIMEOPTIONS 1.0asian
  50   - EM_GETIMESTATUS
  51   - EM_GETLANGOPTIONS 2.0
  52   - EM_GETLIMITTEXT
  53   - EM_GETLINE
  54   + EM_GETLINECOUNT   returns number of rows, not of paragraphs
  55   + EM_GETMODIFY
  56   - EM_GETOLEINTERFACE
  57   - EM_GETOPTIONS
  58   + EM_GETPARAFORMAT
  59   - EM_GETPASSWORDCHAR 2.0
  60   - EM_GETPUNCTUATION 1.0asian
  61   - EM_GETRECT
  62   - EM_GETREDONAME 2.0
  63   + EM_GETSEL
  64   + EM_GETSELTEXT (ANSI&Unicode)
  65   - EM_GETSCROLLPOS 3.0
  66 ! - EM_GETTHUMB
  67   - EM_GETTEXTEX 2.0
  68   + EM_GETTEXTLENGTHEX (GTL_PRECISE unimplemented)
  69   - EM_GETTEXTMODE 2.0
  70 ? + EM_GETTEXTRANGE (ANSI&Unicode)
  71   - EM_GETTYPOGRAPHYOPTIONS 3.0
  72   - EM_GETUNDONAME
  73   - EM_GETWORDBREAKPROC
  74   - EM_GETWORDBREAKPROCEX
  75   - EM_GETWORDWRAPMODE 1.0asian
  76   - EM_SETZOOM 3.0
  77   - EM_HIDESELECTION
  78   - EM_LIMITTEXT
  79   - EM_LINEFROMCHAR
  80   - EM_LINEINDEX
  81   - EM_LINELENGTH
  82   + EM_LINESCROLL
  83   - EM_PASTESPECIAL
  84   - EM_POSFROMCHARS
  85   + EM_REDO 2.0
  86   - EM_REQUESTRESIZE
  87   + EM_REPLACESEL (proper style?) ANSI&Unicode
  88   - EM_SCROLL
  89   - EM_SCROLLCARET
  90   - EM_SELECTIONTYPE
  91   - EM_SETBIDIOPTIONS 3.0
  92   + EM_SETBKGNDCOLOR
  93   - EM_SETCHARFORMAT (partly done, no ANSI)
  94   - EM_SETEDITSTYLE
  95   + EM_SETEVENTMASK (few notifications supported)
  96   - EM_SETFONTSIZE
  97   - EM_SETIMECOLOR 1.0asian
  98   - EM_SETIMEOPTIONS 1.0asian
  99   - EM_SETLANGOPTIONS 2.0
 100   - EM_SETLIMITTEXT
 101   + EM_SETMODIFY (not sure if implementation is correct)
 102   - EM_SETOLECALLBACK
 103   - EM_SETOPTIONS
 104   - EM_SETPALETTE 2.0
 105   + EM_SETPARAFORMAT
 106   - EM_SETPASSWORDCHAR 2.0
 107   - EM_SETPUNCTUATION 1.0asian
 108   + EM_SETREADONLY no beep on modification attempt
 109   - EM_SETRECT
 110   - EM_SETRECTNP (EM_SETRECT without repainting) - not supported in RICHEDIT
 111   + EM_SETSEL
 112   - EM_SETSCROLLPOS 3.0
 113   - EM_SETTABSTOPS 3.0
 114   - EM_SETTARGETDEVICE
 115   - EM_SETTEXTEX 3.0
 116   - EM_SETTEXTMODE 2.0
 117   - EM_SETTYPOGRAPHYOPTIONS 3.0
 118   - EM_SETUNDOLIMIT 2.0
 119   - EM_SETWORDBREAKPROC
 120   - EM_SETWORDBREAKPROCEX
 121   - EM_SETWORDWRAPMODE 1.0asian
 122   - EM_SETZOOM 3.0
 123   - EM_SHOWSCROLLBAR 2.0
 124   - EM_STOPGROUPTYPING 2.0
 125   + EM_STREAMIN
 126   + EM_STREAMOUT
 127   + EM_UNDO
 128   + WM_CHAR
 129   + WM_CLEAR
 130   + WM_COPY
 131   + WM_CUT
 132   + WM_GETDLGCODE (the current implementation is incomplete)
 133   + WM_GETTEXT (ANSI&Unicode)
 134   + WM_GETTEXTLENGTH (ANSI version sucks)
 135   + WM_PASTE
 136   - WM_SETFONT
 137   + WM_SETTEXT (resets undo stack !) (proper style?) ANSI&Unicode
 138   - WM_STYLECHANGING
 139   - WM_STYLECHANGED (things like read-only flag)
 140   - WM_UNICHAR
 141
 142   Notifications
 143
 144   * EN_CHANGE (sent from the wrong place)
 145   - EN_CORRECTTEXT
 146   - EN_DROPFILES
 147   - EN_ERRSPACE
 148   - EN_HSCROLL
 149   - EN_IMECHANGE
 150   + EN_KILLFOCUS
 151   - EN_LINK
 152   - EN_MAXTEXT
 153   - EN_MSGFILTER
 154   - EN_OLEOPFAILED
 155   - EN_PROTECTED
 156   - EN_REQUESTRESIZE
 157   - EN_SAVECLIPBOARD
 158   + EN_SELCHANGE
 159   + EN_SETFOCUS
 160   - EN_STOPNOUNDO
 161   * EN_UPDATE (sent from the wrong place)
 162   - EN_VSCROLL
 163
 164   Styles
 165
 166   - ES_AUTOHSCROLL
 167   - ES_AUTOVSCROLL
 168   - ES_CENTER
 169   - ES_DISABLENOSCROLL (scrollbar is always visible)
 170   - ES_EX_NOCALLOLEINIT
 171   - ES_LEFT
 172   - ES_MULTILINE (currently single line controls aren't supported)
 173   - ES_NOIME
 174   - ES_READONLY (I'm not sure if beeping is the proper behaviour)
 175   - ES_RIGHT
 176   - ES_SAVESEL
 177   - ES_SELFIME
 178   - ES_SUNKEN
 179   - ES_VERTICAL
 180   - ES_WANTRETURN (don't know how to do WM_GETDLGCODE part)
 181   - WS_SETFONT
 182   - WS_HSCROLL
 183   - WS_VSCROLL
 184 */
 185
 186 /*
 187  * RICHED20 TODO (incomplete):
 188  *
 189  * - messages/styles/notifications listed above
 190  * - Undo coalescing
 191  * - add remaining CHARFORMAT/PARAFORMAT fields
 192  * - right/center align should strip spaces from the beginning
 193  * - more advanced navigation (Ctrl-arrows)
 194  * - tabs
 195  * - pictures/OLE objects (not just smiling faces that lack API support ;-) )
 196  * - COM interface (looks like a major pain in the TODO list)
 197  * - calculate heights of pictures (half-done)
 198  * - horizontal scrolling (not even started)
 199  * - hysteresis during wrapping (related to scrollbars appearing/disappearing)
 200  * - find/replace
 201  * - how to implement EM_FORMATRANGE and EM_DISPLAYBAND ? (Mission Impossible)
 202  * - italic caret with italic fonts
 203  * - IME
 204  * - most notifications aren't sent at all (the most important ones are)
 205  * - when should EN_SELCHANGE be sent after text change ? (before/after EN_UPDATE?)
 206  * - WM_SETTEXT may use wrong style (but I'm 80% sure it's OK)
 207  * - EM_GETCHARFORMAT with SCF_SELECTION may not behave 100% like in original (but very close)
 208  *
 209  * Bugs that are probably fixed, but not so easy to verify:
 210  * - EN_UPDATE/EN_CHANGE are handled very incorrectly (should be OK now)
 211  * - undo for ME_JoinParagraphs doesn't store paragraph format ? (it does)
 212  * - check/fix artificial EOL logic (bCursorAtEnd, hardly logical)
 213  * - caret shouldn't be displayed when selection isn't empty
 214  * - check refcounting in style management functions (looks perfect now, but no bugs is suspicious)
 215  * - undo for setting default format (done, might be buggy)
 216  * - styles might be not released properly (looks like they work like charm, but who knows?
 217  *
 218  */
 219
 220 #include "editor.h"
 221 #include "ole2.h"
 222 #include "richole.h"
 223 #include "winreg.h"
 224 #define NO_SHLWAPI_STREAM
 225 #include "shlwapi.h"
 226
 227 #include "rtf.h"
 228
 229 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
 230
 231 int me_debug = 0;
 232 HANDLE me_heap = NULL;
 233
 234 static ME_TextBuffer *ME_MakeText(void) {
 235
 236   ME_TextBuffer *buf = ALLOC_OBJ(ME_TextBuffer);
 237
 238   ME_DisplayItem *p1 = ME_MakeDI(diTextStart);
 239   ME_DisplayItem *p2 = ME_MakeDI(diTextEnd);
 240
 241   p1->prev = NULL;
 242   p1->next = p2;
 243   p2->prev = p1;
 244   p2->next = NULL;
 245   p1->member.para.next_para = p2;
 246   p2->member.para.prev_para = p1;
 247   p2->member.para.nCharOfs = 0;
 248
 249   buf->pFirst = p1;
 250   buf->pLast = p2;
 251   buf->pCharStyle = NULL;
 252
 253   return buf;
 254 }
 255
 256
 257 static LRESULT ME_StreamInText(ME_TextEditor *editor, DWORD dwFormat, ME_InStream *stream, ME_Style *style)
 258 {
 259   WCHAR wszText[STREAMIN_BUFFER_SIZE+1];
 260   WCHAR *pText;
 261
 262   TRACE("%08lx %p\n", dwFormat, stream);
 263
 264   do {
 265     long nWideChars = 0;
 266
 267     if (!stream->dwSize)
 268     {
 269       ME_StreamInFill(stream);
 270       if (stream->editstream->dwError)
 271         break;
 272       if (!stream->dwSize)
 273         break;
 274     }
 275
 276     if (!(dwFormat & SF_UNICODE))
 277     {
 278       /* FIXME? this is doomed to fail on true MBCS like UTF-8, luckily they're unlikely to be used as CP_ACP */
 279       nWideChars = MultiByteToWideChar(CP_ACP, 0, stream->buffer, stream->dwSize, wszText, STREAMIN_BUFFER_SIZE);
 280       pText = wszText;
 281     }
 282     else
 283     {
 284       nWideChars = stream->dwSize >> 1;
 285       pText = (WCHAR *)stream->buffer;
 286     }
 287
 288     ME_InsertTextFromCursor(editor, 0, pText, nWideChars, style);
 289     if (stream->dwSize < STREAMIN_BUFFER_SIZE)
 290       break;
 291     stream->dwSize = 0;
 292   } while(1);
 293   ME_CommitUndo(editor);
 294   ME_Repaint(editor);
 295   return 0;
 296 }
 297
 298 static void ME_RTFCharAttrHook(RTF_Info *info)
 299 {
 300   CHARFORMAT2W fmt;
 301   fmt.cbSize = sizeof(fmt);
 302   fmt.dwMask = 0;
 303
 304   switch(info->rtfMinor)
 305   {
 306     case rtfPlain:
 307       /* FIXME add more flags once they're implemented */
 308       fmt.dwMask = CFM_BOLD | CFM_ITALIC | CFM_UNDERLINE | CFM_STRIKEOUT | CFM_COLOR | CFM_BACKCOLOR | CFM_SIZE | CFM_WEIGHT;
 309       fmt.dwEffects = CFE_AUTOCOLOR | CFE_AUTOBACKCOLOR;
 310       fmt.yHeight = 12*20; /* 12pt */
 311       fmt.wWeight = 400;
 312       break;
 313     case rtfBold:
 314       fmt.dwMask = CFM_BOLD;
 315       fmt.dwEffects = info->rtfParam ? fmt.dwMask : 0;
 316       break;
 317     case rtfItalic:
 318       fmt.dwMask = CFM_ITALIC;
 319       fmt.dwEffects = info->rtfParam ? fmt.dwMask : 0;
 320       break;
 321     case rtfUnderline:
 322       fmt.dwMask = CFM_UNDERLINE;
 323       fmt.dwEffects = info->rtfParam ? fmt.dwMask : 0;
 324       fmt.bUnderlineType = CFU_CF1UNDERLINE;
 325       break;
 326     case rtfNoUnderline:
 327       fmt.dwMask = CFM_UNDERLINE;
 328       fmt.dwEffects = 0;
 329       break;
 330     case rtfStrikeThru:
 331       fmt.dwMask = CFM_STRIKEOUT;
 332       fmt.dwEffects = info->rtfParam ? fmt.dwMask : 0;
 333       break;
 334     case rtfSubScript:
 335     case rtfSuperScript:
 336     case rtfSubScrShrink:
 337     case rtfSuperScrShrink:
 338     case rtfNoSuperSub:
 339       fmt.dwMask = CFM_SUBSCRIPT|CFM_SUPERSCRIPT;
 340       if (info->rtfMinor == rtfSubScrShrink) fmt.dwEffects = CFE_SUBSCRIPT;
 341       if (info->rtfMinor == rtfSuperScrShrink) fmt.dwEffects = CFE_SUPERSCRIPT;
 342       if (info->rtfMinor == rtfNoSuperSub) fmt.dwEffects = 0;
 343       break;
 344     case rtfBackColor:
 345       fmt.dwMask = CFM_BACKCOLOR;
 346       fmt.dwEffects = 0;
 347       if (info->rtfParam == 0)
 348         fmt.dwEffects = CFE_AUTOBACKCOLOR;
 349       else if (info->rtfParam != rtfNoParam)
 350       {
 351         RTFColor *c = RTFGetColor(info, info->rtfParam);
 352         fmt.crTextColor = (c->rtfCBlue<<16)|(c->rtfCGreen<<8)|(c->rtfCRed);
 353       }
 354       break;
 355     case rtfForeColor:
 356       fmt.dwMask = CFM_COLOR;
 357       fmt.dwEffects = 0;
 358       if (info->rtfParam == 0)
 359         fmt.dwEffects = CFE_AUTOCOLOR;
 360       else if (info->rtfParam != rtfNoParam)
 361       {
 362         RTFColor *c = RTFGetColor(info, info->rtfParam);
 363         fmt.crTextColor = (c->rtfCBlue<<16)|(c->rtfCGreen<<8)|(c->rtfCRed);
 364       }
 365       break;
 366     case rtfFontNum:
 367       if (info->rtfParam != rtfNoParam)
 368       {
 369         RTFFont *f = RTFGetFont(info, info->rtfParam);
 370         if (f)
 371         {
 372           MultiByteToWideChar(CP_ACP, 0, f->rtfFName, -1, fmt.szFaceName, sizeof(fmt.szFaceName)/sizeof(WCHAR));
 373           fmt.szFaceName[sizeof(fmt.szFaceName)/sizeof(WCHAR)-1] = '\0';
 374           fmt.bCharSet = f->rtfFCharSet;
 375           fmt.dwMask = CFM_FACE | CFM_CHARSET;
 376         }
 377       }
 378       break;
 379     case rtfFontSize:
 380       fmt.dwMask = CFM_SIZE;
 381       if (info->rtfParam != rtfNoParam)
 382         fmt.yHeight = info->rtfParam*10;
 383       break;
 384   }
 385   if (fmt.dwMask) {
 386     ME_Style *style2;
 387     RTFFlushOutputBuffer(info);
 388     /* FIXME too slow ? how come ? */
 389     style2 = ME_ApplyStyle(info->style, &fmt);
 390     ME_ReleaseStyle(info->style);
 391     info->style = style2;
 392   }
 393 }
 394
 395 /* FIXME this function doesn't get any information about context of the RTF tag, which is very bad,
 396    the same tags mean different things in different contexts */
 397 static void ME_RTFParAttrHook(RTF_Info *info)
 398 {
 399   PARAFORMAT2 fmt;
 400   fmt.cbSize = sizeof(fmt);
 401   fmt.dwMask = 0;
 402
 403   switch(info->rtfMinor)
 404   {
 405   case rtfParDef: /* I'm not 100% sure what does it do, but I guess it restores default paragraph attributes */
 406     fmt.dwMask = PFM_ALIGNMENT | PFM_TABSTOPS | PFM_OFFSET | PFM_STARTINDENT;
 407     fmt.wAlignment = PFA_LEFT;
 408     fmt.cTabCount = 0;
 409     fmt.dxOffset = fmt.dxStartIndent = 0;
 410     break;
 411   case rtfFirstIndent:
 412     ME_GetSelectionParaFormat(info->editor, &fmt);
 413     fmt.dwMask = PFM_STARTINDENT;
 414     fmt.dxStartIndent = info->rtfParam + fmt.dxOffset;
 415     break;
 416   case rtfLeftIndent:
 417   {
 418     int first, left;
 419     ME_GetSelectionParaFormat(info->editor, &fmt);
 420     first = fmt.dxStartIndent;
 421     left = info->rtfParam;
 422     fmt.dwMask = PFM_STARTINDENT|PFM_OFFSET;
 423     fmt.dxStartIndent = first + left;
 424     fmt.dxOffset = -first;
 425     break;
 426   }
 427   case rtfRightIndent:
 428     fmt.dwMask = PFM_RIGHTINDENT;
 429     fmt.dxRightIndent = info->rtfParam;
 430     break;
 431   case rtfQuadLeft:
 432   case rtfQuadJust:
 433     fmt.dwMask = PFM_ALIGNMENT;
 434     fmt.wAlignment = PFA_LEFT;
 435     break;
 436   case rtfQuadRight:
 437     fmt.dwMask = PFM_ALIGNMENT;
 438     fmt.wAlignment = PFA_RIGHT;
 439     break;
 440   case rtfQuadCenter:
 441     fmt.dwMask = PFM_ALIGNMENT;
 442     fmt.wAlignment = PFA_CENTER;
 443     break;
 444   case rtfTabPos:
 445     ME_GetSelectionParaFormat(info->editor, &fmt);
 446     if (!(fmt.dwMask & PFM_TABSTOPS))
 447     {
 448       fmt.dwMask |= PFM_TABSTOPS;
 449       fmt.cTabCount = 0;
 450     }
 451     if (fmt.cTabCount < MAX_TAB_STOPS)
 452       fmt.rgxTabs[fmt.cTabCount++] = info->rtfParam;
 453     break;
 454   }
 455   if (fmt.dwMask) {
 456     RTFFlushOutputBuffer(info);
 457     /* FIXME too slow ? how come ?*/
 458     ME_SetSelectionParaFormat(info->editor, &fmt);
 459   }
 460 }
 461
 462 static void ME_RTFReadHook(RTF_Info *info) {
 463   switch(info->rtfClass)
 464   {
 465     case rtfGroup:
 466       switch(info->rtfMajor)
 467       {
 468         case rtfBeginGroup:
 469           if (info->stackTop < maxStack) {
 470             memcpy(&info->stack[info->stackTop].fmt, &info->style->fmt, sizeof(CHARFORMAT2W));
 471             info->stack[info->stackTop].codePage = info->codePage;
 472             info->stack[info->stackTop].unicodeLength = info->unicodeLength;
 473           }
 474           info->stackTop++;
 475           break;
 476         case rtfEndGroup:
 477         {
 478           ME_Style *s;
 479           RTFFlushOutputBuffer(info);
 480           info->stackTop--;
 481           /* FIXME too slow ? how come ? */
 482           s = ME_ApplyStyle(info->style, &info->stack[info->stackTop].fmt);
 483           ME_ReleaseStyle(info->style);
 484           info->style = s;
 485           info->codePage = info->stack[info->stackTop].codePage;
 486           info->unicodeLength = info->stack[info->stackTop].unicodeLength;
 487           break;
 488         }
 489       }
 490       break;
 491     case rtfControl:
 492       switch(info->rtfMajor)
 493       {
 494         case rtfCharAttr:
 495           ME_RTFCharAttrHook(info);
 496           break;
 497         case rtfParAttr:
 498           ME_RTFParAttrHook(info);
 499           break;
 500       }
 501       break;
 502   }
 503 }
 504
 505 void
 506 ME_StreamInFill(ME_InStream *stream)
 507 {
 508   stream->editstream->dwError = stream->editstream->pfnCallback(stream->editstream->dwCookie,
 509                                                                 stream->buffer,
 510                                                                 sizeof(stream->buffer),
 511                                                                 &stream->dwSize);
 512   stream->dwUsed = 0;
 513 }
 514
 515 static LRESULT ME_StreamIn(ME_TextEditor *editor, DWORD format, EDITSTREAM *stream)
 516 {
 517   RTF_Info parser;
 518   ME_Style *style;
 519   int from, to, to2, nUndoMode;
 520   ME_UndoItem *pUI;
 521   int nEventMask = editor->nEventMask;
 522   ME_InStream inStream;
 523
 524   TRACE("stream==%p hWnd==%p format==0x%X\n", stream, editor->hWnd, (UINT)format);
 525   editor->nEventMask = 0;
 526
 527   ME_GetSelection(editor, &from, &to);
 528   if (format & SFF_SELECTION) {
 529     style = ME_GetSelectionInsertStyle(editor);
 530
 531     ME_InternalDeleteText(editor, from, to-from);
 532   }
 533   else {
 534     style = editor->pBuffer->pDefaultStyle;
 535     ME_AddRefStyle(style);
 536     SendMessageA(editor->hWnd, EM_SETSEL, 0, 0);
 537     ME_InternalDeleteText(editor, 0, ME_GetTextLength(editor));
 538     from = to = 0;
 539     ME_ClearTempStyle(editor);
 540     /* FIXME restore default paragraph formatting ! */
 541   }
 542
 543   nUndoMode = editor->nUndoMode;
 544   editor->nUndoMode = umIgnore;
 545
 546   inStream.editstream = stream;
 547   inStream.editstream->dwError = 0;
 548   inStream.dwSize = 0;
 549   inStream.dwUsed = 0;
 550
 551   if (format & SF_RTF)
 552   {
 553     /* Check if it's really RTF, and if it is not, use plain text */
 554     ME_StreamInFill(&inStream);
 555     if (!inStream.editstream->dwError)
 556     {
 557       if (strncmp(inStream.buffer, "{\\rtf1", 6) && strncmp(inStream.buffer, "{\\urtf", 6))
 558       {
 559         format &= ~SF_RTF;
 560         format |= SF_TEXT;
 561       }
 562     }
 563   }
 564
 565   if (!inStream.editstream->dwError)
 566   {
 567     if (format & SF_RTF) {
 568       /* setup the RTF parser */
 569       memset(&parser, 0, sizeof parser);
 570       RTFSetEditStream(&parser, &inStream);
 571       parser.rtfFormat = format&(SF_TEXT|SF_RTF);
 572       parser.hwndEdit = editor->hWnd;
 573       parser.editor = editor;
 574       parser.style = style;
 575       WriterInit(&parser);
 576       RTFInit(&parser);
 577       RTFSetReadHook(&parser, ME_RTFReadHook);
 578       BeginFile(&parser);
 579
 580       /* do the parsing */
 581       RTFRead(&parser);
 582       RTFFlushOutputBuffer(&parser);
 583       RTFDestroy(&parser);
 584
 585       style = parser.style;
 586     }
 587     else if (format & SF_TEXT)
 588       ME_StreamInText(editor, format, &inStream, style);
 589     else
 590       ERR("EM_STREAMIN without SF_TEXT or SF_RTF\n");
 591     ME_GetSelection(editor, &to, &to2);
 592     /* put the cursor at the top */
 593     if (!(format & SFF_SELECTION))
 594       SendMessageA(editor->hWnd, EM_SETSEL, 0, 0);
 595     else
 596     {
 597       /* FIXME where to put cursor now ? */
 598     }
 599   }
 600
 601   editor->nUndoMode = nUndoMode;
 602   pUI = ME_AddUndoItem(editor, diUndoDeleteRun, NULL);
 603   TRACE("from %d to %d\n", from, to);
 604   if (pUI && from < to)
 605   {
 606     pUI->nStart = from;
 607     pUI->nLen = to-from;
 608   }
 609   ME_CommitUndo(editor);
 610   ME_ReleaseStyle(style);
 611   editor->nEventMask = nEventMask;
 612   InvalidateRect(editor->hWnd, NULL, TRUE);
 613   ME_UpdateRepaint(editor);
 614   if (!(format & SFF_SELECTION)) {
 615     ME_ClearTempStyle(editor);
 616   }
 617   ME_MoveCaret(editor);
 618   ME_SendSelChange(editor);
 619
 620   return 0;
 621 }
 622
 623
 624 ME_DisplayItem *
 625 ME_FindItemAtOffset(ME_TextEditor *editor, ME_DIType nItemType, int nOffset, int *nItemOffset)
 626 {
 627   ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
 628
 629   while (item && item->member.para.next_para->member.para.nCharOfs <= nOffset)
 630     item = ME_FindItemFwd(item, diParagraph);
 631
 632   if (!item)
 633     return item;
 634
 635   nOffset -= item->member.para.nCharOfs;
 636   if (nItemType == diParagraph) {
 637     if (nItemOffset)
 638       *nItemOffset = nOffset;
 639     return item;
 640   }
 641
 642   do {
 643     item = ME_FindItemFwd(item, diRun);
 644   } while (item && (item->member.run.nCharOfs + ME_StrLen(item->member.run.strText) <= nOffset));
 645   if (item) {
 646     nOffset -= item->member.run.nCharOfs;
 647     if (nItemOffset)
 648       *nItemOffset = nOffset;
 649   }
 650   return item;
 651 }
 652
 653
 654 ME_TextEditor *ME_MakeEditor(HWND hWnd) {
 655   ME_TextEditor *ed = ALLOC_OBJ(ME_TextEditor);
 656   HDC hDC;
 657   int i;
 658   ed->hWnd = hWnd;
 659   ed->pBuffer = ME_MakeText();
 660   hDC = GetDC(hWnd);
 661   ME_MakeFirstParagraph(hDC, ed->pBuffer);
 662   ReleaseDC(hWnd, hDC);
 663   ed->bCaretShown = FALSE;
 664   ed->nCursors = 3;
 665   ed->pCursors = ALLOC_N_OBJ(ME_Cursor, ed->nCursors);
 666   ed->pCursors[0].pRun = ME_FindItemFwd(ed->pBuffer->pFirst, diRun);
 667   ed->pCursors[0].nOffset = 0;
 668   ed->pCursors[1].pRun = ME_FindItemFwd(ed->pBuffer->pFirst, diRun);
 669   ed->pCursors[1].nOffset = 0;
 670   ed->nLastTotalLength = ed->nTotalLength = 0;
 671   ed->nUDArrowX = -1;
 672   ed->nSequence = 0;
 673   ed->rgbBackColor = -1;
 674   ed->bCaretAtEnd = FALSE;
 675   ed->nEventMask = 0;
 676   ed->nModifyStep = 0;
 677   ed->pUndoStack = ed->pRedoStack = NULL;
 678   ed->nUndoMode = umAddToUndo;
 679   ed->nParagraphs = 1;
 680   ed->nLastSelStart = ed->nLastSelEnd = 0;
 681   ed->nScrollPosY = 0;
 682   for (i=0; i<HFONT_CACHE_SIZE; i++)
 683   {
 684     ed->pFontCache[i].nRefs = 0;
 685     ed->pFontCache[i].nAge = 0;
 686     ed->pFontCache[i].hFont = NULL;
 687   }
 688   ME_CheckCharOffsets(ed);
 689   return ed;
 690 }
 691
 692 typedef struct tagME_GlobalDestStruct
 693 {
 694   HGLOBAL hData;
 695   int nLength;
 696 } ME_GlobalDestStruct;
 697
 698 static DWORD CALLBACK ME_AppendToHGLOBAL(DWORD_PTR dwCookie, LPBYTE lpBuff, LONG cb, LONG *pcb)
 699 {
 700   ME_GlobalDestStruct *pData = (ME_GlobalDestStruct *)dwCookie;
 701   int nMaxSize;
 702   BYTE *pDest;
 703
 704   nMaxSize = GlobalSize(pData->hData);
 705   if (pData->nLength+cb+1 >= cb)
 706   {
 707     /* round up to 2^17 */
 708     int nNewSize = (((nMaxSize+cb+1)|0x1FFFF)+1) & 0xFFFE0000;
 709     pData->hData = GlobalReAlloc(pData->hData, nNewSize, 0);
 710   }
 711   pDest = (BYTE *)GlobalLock(pData->hData);
 712   memcpy(pDest + pData->nLength, lpBuff, cb);
 713   pData->nLength += cb;
 714   pDest[pData->nLength] = '\0';
 715   GlobalUnlock(pData->hData);
 716   *pcb = cb;
 717
 718   return 0;
 719 }
 720
 721 static DWORD CALLBACK ME_ReadFromHGLOBALUnicode(DWORD_PTR dwCookie, LPBYTE lpBuff, LONG cb, LONG *pcb)
 722 {
 723   ME_GlobalDestStruct *pData = (ME_GlobalDestStruct *)dwCookie;
 724   int i;
 725   WORD *pSrc, *pDest;
 726
 727   cb = cb >> 1;
 728   pDest = (WORD *)lpBuff;
 729   pSrc = (WORD *)GlobalLock(pData->hData);
 730   for (i = 0; i<cb && pSrc[pData->nLength+i]; i++) {
 731     pDest[i] = pSrc[pData->nLength+i];
 732   }
 733   pData->nLength += i;
 734   *pcb = 2*i;
 735   GlobalUnlock(pData->hData);
 736   return 0;
 737 }
 738
 739 static DWORD CALLBACK ME_ReadFromHGLOBALRTF(DWORD_PTR dwCookie, LPBYTE lpBuff, LONG cb, LONG *pcb)
 740 {
 741   ME_GlobalDestStruct *pData = (ME_GlobalDestStruct *)dwCookie;
 742   int i;
 743   BYTE *pSrc, *pDest;
 744
 745   pDest = lpBuff;
 746   pSrc = (BYTE *)GlobalLock(pData->hData);
 747   for (i = 0; i<cb && pSrc[pData->nLength+i]; i++) {
 748     pDest[i] = pSrc[pData->nLength+i];
 749   }
 750   pData->nLength += i;
 751   *pcb = i;
 752   GlobalUnlock(pData->hData);
 753   return 0;
 754 }
 755
 756 void ME_DestroyEditor(ME_TextEditor *editor)
 757 {
 758   ME_DisplayItem *pFirst = editor->pBuffer->pFirst;
 759   ME_DisplayItem *p = pFirst, *pNext = NULL;
 760   int i;
 761
 762   ME_ClearTempStyle(editor);
 763   ME_EmptyUndoStack(editor);
 764   while(p) {
 765     pNext = p->next;
 766     ME_DestroyDisplayItem(p);
 767     p = pNext;
 768   }
 769   ME_ReleaseStyle(editor->pBuffer->pDefaultStyle);
 770   for (i=0; i<HFONT_CACHE_SIZE; i++)
 771   {
 772     if (editor->pFontCache[i].hFont)
 773       DeleteObject(editor->pFontCache[i].hFont);
 774   }
 775
 776   FREE_OBJ(editor);
 777 }
 778
 779 static WCHAR wszClassName[] = {'R', 'i', 'c', 'h', 'E', 'd', 'i', 't', '2', '0', 'W', 0};
 780 static WCHAR wszClassName50[] = {'R', 'i', 'c', 'h', 'E', 'd', 'i', 't', '5', '0', 'W', 0};
 781
 782 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 783 {
 784     TRACE("\n");
 785     switch (fdwReason)
 786     {
 787     case DLL_PROCESS_ATTACH:
 788       DisableThreadLibraryCalls(hinstDLL);
 789       me_heap = HeapCreate (0, 0x10000, 0);
 790       ME_RegisterEditorClass(hinstDLL);
 791       break;
 792
 793     case DLL_PROCESS_DETACH:
 794       UnregisterClassW(wszClassName, 0);
 795       UnregisterClassW(wszClassName50, 0);
 796       UnregisterClassA("RichEdit20A", 0);
 797       UnregisterClassA("RichEdit50A", 0);
 798       HeapDestroy (me_heap);
 799       me_heap = NULL;
 800       break;
 801     }
 802     return TRUE;
 803 }
 804
 805
 806 #define UNSUPPORTED_MSG(e) \
 807   case e: \
 808     FIXME(#e ": stub\n"); \
 809     return DefWindowProcW(hWnd, msg, wParam, lParam);
 810
 811 /******************************************************************
 812  *        RichEditANSIWndProc (RICHED20.10)
 813  */
 814 LRESULT WINAPI RichEditANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) {
 815   HDC hDC;
 816   PAINTSTRUCT ps;
 817   SCROLLINFO si;
 818   ME_TextEditor *editor = (ME_TextEditor *)GetWindowLongW(hWnd, 0);
 819   TRACE("msg %d %08x %08lx\n", msg, wParam, lParam);
 820   switch(msg) {
 821
 822   UNSUPPORTED_MSG(EM_AUTOURLDETECT)
 823   UNSUPPORTED_MSG(EM_CHARFROMPOS)
 824   UNSUPPORTED_MSG(EM_DISPLAYBAND)
 825   UNSUPPORTED_MSG(EM_EXLIMITTEXT)
 826   UNSUPPORTED_MSG(EM_EXLINEFROMCHAR)
 827   UNSUPPORTED_MSG(EM_FINDTEXT)
 828   UNSUPPORTED_MSG(EM_FINDTEXTEX)
 829   UNSUPPORTED_MSG(EM_FINDWORDBREAK)
 830   UNSUPPORTED_MSG(EM_FMTLINES)
 831   UNSUPPORTED_MSG(EM_FORMATRANGE)
 832   UNSUPPORTED_MSG(EM_GETAUTOURLDETECT)
 833   UNSUPPORTED_MSG(EM_GETBIDIOPTIONS)
 834   UNSUPPORTED_MSG(EM_GETEDITSTYLE)
 835   UNSUPPORTED_MSG(EM_GETFIRSTVISIBLELINE)
 836   UNSUPPORTED_MSG(EM_GETIMECOMPMODE)
 837   /* UNSUPPORTED_MSG(EM_GETIMESTATUS) missing in Wine headers */
 838   UNSUPPORTED_MSG(EM_GETLANGOPTIONS)
 839   UNSUPPORTED_MSG(EM_GETLIMITTEXT)
 840   UNSUPPORTED_MSG(EM_GETLINE)
 841   /* UNSUPPORTED_MSG(EM_GETOLEINTERFACE) separate stub */
 842   UNSUPPORTED_MSG(EM_GETOPTIONS)
 843   UNSUPPORTED_MSG(EM_GETPASSWORDCHAR)
 844   UNSUPPORTED_MSG(EM_GETRECT)
 845   UNSUPPORTED_MSG(EM_GETREDONAME)
 846   UNSUPPORTED_MSG(EM_GETSCROLLPOS)
 847   UNSUPPORTED_MSG(EM_GETTEXTMODE)
 848   UNSUPPORTED_MSG(EM_GETTYPOGRAPHYOPTIONS)
 849   UNSUPPORTED_MSG(EM_GETUNDONAME)
 850   UNSUPPORTED_MSG(EM_GETWORDBREAKPROC)
 851   UNSUPPORTED_MSG(EM_GETWORDBREAKPROCEX)
 852   UNSUPPORTED_MSG(EM_GETZOOM)
 853   UNSUPPORTED_MSG(EM_HIDESELECTION)
 854   UNSUPPORTED_MSG(EM_LIMITTEXT) /* also known as EM_SETLIMITTEXT */
 855   UNSUPPORTED_MSG(EM_LINEFROMCHAR)
 856   UNSUPPORTED_MSG(EM_LINEINDEX)
 857   UNSUPPORTED_MSG(EM_LINELENGTH)
 858   UNSUPPORTED_MSG(EM_PASTESPECIAL)
 859 /*  UNSUPPORTED_MSG(EM_POSFROMCHARS) missing in Wine headers */
 860   UNSUPPORTED_MSG(EM_REQUESTRESIZE)
 861   UNSUPPORTED_MSG(EM_SCROLL)
 862   UNSUPPORTED_MSG(EM_SCROLLCARET)
 863   UNSUPPORTED_MSG(EM_SELECTIONTYPE)
 864   UNSUPPORTED_MSG(EM_SETBIDIOPTIONS)
 865   UNSUPPORTED_MSG(EM_SETEDITSTYLE)
 866   UNSUPPORTED_MSG(EM_SETFONTSIZE)
 867   UNSUPPORTED_MSG(EM_SETLANGOPTIONS)
 868   UNSUPPORTED_MSG(EM_SETOLECALLBACK)
 869   UNSUPPORTED_MSG(EM_SETOPTIONS)
 870   UNSUPPORTED_MSG(EM_SETPALETTE)
 871   UNSUPPORTED_MSG(EM_SETPASSWORDCHAR)
 872   UNSUPPORTED_MSG(EM_SETRECT)
 873   UNSUPPORTED_MSG(EM_SETRECTNP)
 874   UNSUPPORTED_MSG(EM_SETSCROLLPOS)
 875   UNSUPPORTED_MSG(EM_SETTABSTOPS)
 876   UNSUPPORTED_MSG(EM_SETTARGETDEVICE)
 877   UNSUPPORTED_MSG(EM_SETTEXTEX)
 878   UNSUPPORTED_MSG(EM_SETTEXTMODE)
 879   UNSUPPORTED_MSG(EM_SETTYPOGRAPHYOPTIONS)
 880   UNSUPPORTED_MSG(EM_SETUNDOLIMIT)
 881   UNSUPPORTED_MSG(EM_SETWORDBREAKPROC)
 882   UNSUPPORTED_MSG(EM_SETWORDBREAKPROCEX)
 883   UNSUPPORTED_MSG(EM_SHOWSCROLLBAR)
 884   UNSUPPORTED_MSG(EM_SETZOOM)
 885   UNSUPPORTED_MSG(WM_SETFONT)
 886   UNSUPPORTED_MSG(WM_STYLECHANGING)
 887   UNSUPPORTED_MSG(WM_STYLECHANGED)
 888 /*  UNSUPPORTED_MSG(WM_UNICHAR) FIXME missing in Wine headers */
 889
 890 /* Messages specific to Richedit controls */
 891
 892   case EM_STREAMIN:
 893    return ME_StreamIn(editor, wParam, (EDITSTREAM*)lParam);
 894   case EM_STREAMOUT:
 895    return ME_StreamOut(editor, wParam, (EDITSTREAM *)lParam);
 896   case WM_GETDLGCODE:
 897   {
 898     UINT code = DLGC_WANTCHARS|DLGC_WANTARROWS;
 899     if (GetWindowLongW(hWnd, GWL_STYLE)&ES_WANTRETURN)
 900       code |= 0; /* FIXME what can we do here ? ask for messages and censor them ? */
 901     return code;
 902   }
 903   case WM_NCCREATE:
 904   {
 905     CREATESTRUCTW *pcs = (CREATESTRUCTW *)lParam;
 906     editor = ME_MakeEditor(hWnd);
 907     SetWindowLongW(hWnd, 0, (long)editor);
 908     pcs = 0; /* ignore */
 909     return TRUE;
 910   }
 911   case EM_EMPTYUNDOBUFFER:
 912     ME_EmptyUndoStack(editor);
 913     return 0;
 914   case EM_GETSEL:
 915   {
 916     /* Note: wParam/lParam can be NULL */
 917     UINT from, to;
 918     PUINT pfrom = wParam ? (PUINT)wParam : &from;
 919     PUINT pto = lParam ? (PUINT)lParam : &to;
 920     ME_GetSelection(editor, pfrom, pto);
 921     if ((*pfrom|*pto) & 0xFFFF0000)
 922       return -1;
 923     return MAKELONG(*pfrom,*pto);
 924   }
 925   case EM_EXGETSEL:
 926   {
 927     CHARRANGE *pRange = (CHARRANGE *)lParam;
 928     ME_GetSelection(editor, (int *)&pRange->cpMin, (int *)&pRange->cpMax);
 929     return 0;
 930   }
 931   case EM_CANUNDO:
 932     return editor->pUndoStack != NULL;
 933   case EM_CANREDO:
 934     return editor->pRedoStack != NULL;
 935   case EM_UNDO:
 936     ME_Undo(editor);
 937     return 0;
 938   case EM_REDO:
 939     ME_Redo(editor);
 940     return 0;
 941   case EM_SETSEL:
 942   {
 943     ME_SetSelection(editor, wParam, lParam);
 944     ME_Repaint(editor);
 945     ME_SendSelChange(editor);
 946     return 0;
 947   }
 948   case EM_EXSETSEL:
 949   {
 950     CHARRANGE *pRange = (CHARRANGE *)lParam;
 951     ME_SetSelection(editor, pRange->cpMin, pRange->cpMax);
 952     /* FIXME optimize */
 953     ME_Repaint(editor);
 954     ME_SendSelChange(editor);
 955     return 0;
 956   }
 957   case EM_SETBKGNDCOLOR:
 958   {
 959     LRESULT lColor = ME_GetBackColor(editor);
 960     if (wParam)
 961       editor->rgbBackColor = -1;
 962     else
 963       editor->rgbBackColor = lParam;
 964     InvalidateRect(hWnd, NULL, TRUE);
 965     UpdateWindow(hWnd);
 966     return lColor;
 967   }
 968   case EM_GETMODIFY:
 969     return editor->nModifyStep == 0 ? 0 : 1;
 970   case EM_SETMODIFY:
 971   {
 972     if (wParam)
 973       editor->nModifyStep = 0x80000000;
 974     else
 975       editor->nModifyStep = 0;
 976
 977     return 0;
 978   }
 979   case EM_SETREADONLY:
 980   {
 981     long nStyle = GetWindowLongW(hWnd, GWL_STYLE);
 982     if (wParam)
 983       nStyle |= ES_READONLY;
 984     else
 985       nStyle &= ~ES_READONLY;
 986     SetWindowLongW(hWnd, GWL_STYLE, nStyle);
 987     ME_Repaint(editor);
 988     return 0;
 989   }
 990   case EM_SETEVENTMASK:
 991     editor->nEventMask = lParam;
 992     return 0;
 993   case EM_GETEVENTMASK:
 994     return editor->nEventMask;
 995   case EM_SETCHARFORMAT:
 996   {
 997     CHARFORMAT2W buf, *p;
 998     BOOL bRepaint = TRUE;
 999     p = ME_ToCF2W(&buf, (CHARFORMAT2W *)lParam);
1000     if (!wParam)
1001       ME_SetDefaultCharFormat(editor, p);
1002     else if (wParam == (SCF_WORD | SCF_SELECTION))
1003       FIXME("word selection not supported\n");
1004     else if (wParam == SCF_ALL)
1005       ME_SetCharFormat(editor, 0, ME_GetTextLength(editor), p);
1006     else {
1007       int from, to;
1008       ME_GetSelection(editor, &from, &to);
1009       bRepaint = (from != to);
1010       ME_SetSelectionCharFormat(editor, p);
1011     }
1012     ME_CommitUndo(editor);
1013     if (bRepaint)
1014       ME_UpdateRepaint(editor);
1015     return 0;
1016   }
1017   case EM_GETCHARFORMAT:
1018   {
1019     CHARFORMAT2W tmp;
1020     tmp.cbSize = sizeof(tmp);
1021     if (!wParam)
1022       ME_GetDefaultCharFormat(editor, &tmp);
1023     else
1024       ME_GetSelectionCharFormat(editor, &tmp);
1025     ME_CopyToCFAny((CHARFORMAT2W *)lParam, &tmp);
1026     return 0;
1027   }
1028   case EM_SETPARAFORMAT:
1029     ME_SetSelectionParaFormat(editor, (PARAFORMAT2 *)lParam);
1030     ME_UpdateRepaint(editor);
1031     ME_CommitUndo(editor);
1032     return 0;
1033   case EM_GETPARAFORMAT:
1034     ME_GetSelectionParaFormat(editor, (PARAFORMAT2 *)lParam);
1035     return 0;
1036   case EM_LINESCROLL:
1037   {
1038     int nPos = editor->nScrollPosY, nEnd= editor->nTotalLength - editor->sizeWindow.cy;
1039     nPos += 8 * lParam; /* FIXME follow the original */
1040     if (nPos>=nEnd)
1041       nPos = nEnd;
1042     if (nPos<0)
1043       nPos = 0;
1044     if (nPos != editor->nScrollPosY) {
1045       ScrollWindow(hWnd, 0, editor->nScrollPosY-nPos, NULL, NULL);
1046       editor->nScrollPosY = nPos;
1047       SetScrollPos(hWnd, SB_VERT, nPos, TRUE);
1048       UpdateWindow(hWnd);
1049     }
1050     return TRUE; /* Should return false if a single line richedit control */
1051   }
1052   case WM_CLEAR:
1053   {
1054     int from, to;
1055     ME_GetSelection(editor, &from, &to);
1056     ME_InternalDeleteText(editor, from, to-from);
1057     ME_CommitUndo(editor);
1058     ME_UpdateRepaint(editor);
1059     return 0;
1060   }
1061   case EM_REPLACESEL:
1062   {
1063     int from, to;
1064     ME_Style *style;
1065     LPWSTR wszText = ME_ToUnicode(hWnd, (void *)lParam);
1066     size_t len = lstrlenW(wszText);
1067     TRACE("EM_REPLACESEL - %s\n", debugstr_w(wszText));
1068
1069     ME_GetSelection(editor, &from, &to);
1070     style = ME_GetSelectionInsertStyle(editor);
1071     ME_InternalDeleteText(editor, from, to-from);
1072     ME_InsertTextFromCursor(editor, 0, wszText, len, style);
1073     ME_ReleaseStyle(style);
1074     ME_EndToUnicode(hWnd, wszText);
1075     /* drop temporary style if line end */
1076     /* FIXME question: does abc\n mean: put abc, clear temp style, put \n? (would require a change) */
1077     if (len>0 && wszText[len-1] == '\n')
1078       ME_ClearTempStyle(editor);
1079
1080     ME_CommitUndo(editor);
1081     if (!wParam)
1082       ME_EmptyUndoStack(editor);
1083     ME_UpdateRepaint(editor);
1084     return 0;
1085   }
1086   case WM_SETTEXT:
1087   {
1088     LPWSTR wszText = ME_ToUnicode(hWnd, (void *)lParam);
1089     TRACE("WM_SETTEXT - %s\n", (char *)(wszText)); /* debugstr_w() */
1090     ME_InternalDeleteText(editor, 0, ME_GetTextLength(editor));
1091     /* uses default style! */
1092     ME_InsertTextFromCursor(editor, 0, wszText, -1, editor->pBuffer->pDefaultStyle);
1093     ME_EndToUnicode(hWnd, wszText);
1094     ME_CommitUndo(editor);
1095     ME_EmptyUndoStack(editor);
1096     ME_UpdateRepaint(editor);
1097     return 0;
1098   }
1099   case EM_CANPASTE:
1100   {
1101     UINT nRTFFormat = RegisterClipboardFormatA("Rich Text Format");
1102     if (IsClipboardFormatAvailable(nRTFFormat))
1103       return TRUE;
1104     if (IsClipboardFormatAvailable(CF_UNICODETEXT))
1105       return TRUE;
1106     return FALSE;
1107   }
1108   case WM_PASTE:
1109   {
1110     DWORD dwFormat = 0;
1111     EDITSTREAM es;
1112     ME_GlobalDestStruct gds;
1113     UINT nRTFFormat = RegisterClipboardFormatA("Rich Text Format");
1114     UINT cf = 0;
1115
1116     if (IsClipboardFormatAvailable(nRTFFormat))
1117       cf = nRTFFormat, dwFormat = SF_RTF;
1118     else if (IsClipboardFormatAvailable(CF_UNICODETEXT))
1119       cf = CF_UNICODETEXT, dwFormat = SF_TEXT|SF_UNICODE;
1120     else
1121       return 0;
1122
1123     if (!OpenClipboard(hWnd))
1124       return 0;
1125     gds.hData = GetClipboardData(cf);
1126     gds.nLength = 0;
1127     es.dwCookie = (DWORD)&gds;
1128     es.pfnCallback = dwFormat == SF_RTF ? ME_ReadFromHGLOBALRTF : ME_ReadFromHGLOBALUnicode;
1129     SendMessageW(hWnd, EM_STREAMIN, dwFormat|SFF_SELECTION, (LPARAM)&es);
1130
1131     CloseClipboard();
1132     return 0;
1133   }
1134   case WM_CUT:
1135   case WM_COPY:
1136   {
1137     int from, to, pars;
1138     WCHAR *data;
1139     HANDLE hData;
1140     EDITSTREAM es;
1141     ME_GlobalDestStruct gds;
1142
1143     if (!OpenClipboard(hWnd))
1144       return 0;
1145
1146     EmptyClipboard();
1147     ME_GetSelection(editor, &from, &to);
1148     pars = ME_CountParagraphsBetween(editor, from, to);
1149     hData = GlobalAlloc(GMEM_MOVEABLE, sizeof(WCHAR)*(to-from+pars+1));
1150     data = (WCHAR *)GlobalLock(hData);
1151     ME_GetTextW(editor, data, from, to-from, TRUE);
1152     GlobalUnlock(hData);
1153
1154     gds.hData = GlobalAlloc(GMEM_MOVEABLE, 0);
1155     gds.nLength = 0;
1156     es.dwCookie = (DWORD)&gds;
1157     es.pfnCallback = ME_AppendToHGLOBAL;
1158     SendMessageW(hWnd, EM_STREAMOUT, SFF_SELECTION|SF_RTF, (LPARAM)&es);
1159     GlobalReAlloc(gds.hData, gds.nLength+1, 0);
1160
1161     SetClipboardData(CF_UNICODETEXT, hData);
1162     SetClipboardData(RegisterClipboardFormatA("Rich Text Format"), gds.hData);
1163
1164     CloseClipboard();
1165     if (msg == WM_CUT)
1166     {
1167       ME_InternalDeleteText(editor, from, to-from);
1168       ME_CommitUndo(editor);
1169       ME_UpdateRepaint(editor);
1170     }
1171     return 0;
1172   }
1173   case WM_GETTEXTLENGTH:
1174     return ME_GetTextLength(editor);
1175   case EM_GETTEXTLENGTHEX:
1176     return ME_GetTextLengthEx(editor, (GETTEXTLENGTHEX *)wParam);
1177   case WM_GETTEXT:
1178   {
1179     TEXTRANGEW tr; /* W and A differ only by rng->lpstrText */
1180     tr.chrg.cpMin = 0;
1181     tr.chrg.cpMax = wParam-1;
1182     tr.lpstrText = (WCHAR *)lParam;
1183     return RichEditANSIWndProc(hWnd, EM_GETTEXTRANGE, 0, (LPARAM)&tr);
1184   }
1185   case EM_GETTEXTEX:
1186   {
1187     GETTEXTEX *ex = (GETTEXTEX*)wParam;
1188
1189     if (ex->flags != 0)
1190         FIXME("Unhandled EM_GETTEXTEX flags 0x%lx\n",ex->flags);
1191
1192     if (IsWindowUnicode(hWnd))
1193       return ME_GetTextW(editor, (LPWSTR)lParam, 0, ex->cb, FALSE);
1194     else
1195     {
1196         LPWSTR buffer = HeapAlloc(GetProcessHeap(),0,ex->cb*sizeof(WCHAR));
1197         DWORD buflen = ex->cb;
1198         LRESULT rc;
1199         DWORD flags = 0;
1200
1201         buflen = ME_GetTextW(editor, buffer, 0, buflen, FALSE);
1202         rc = WideCharToMultiByte(ex->codepage, flags, buffer, buflen, (LPSTR)lParam, ex->cb, ex->lpDefaultChar, ex->lpUsedDefaultChar);
1203
1204         HeapFree(GetProcessHeap(),0,buffer);
1205         return rc;
1206     }
1207   }
1208   case EM_GETSELTEXT:
1209   {
1210     int from, to;
1211     TEXTRANGEW tr; /* W and A differ only by rng->lpstrText */
1212     ME_GetSelection(editor, &from, &to);
1213     tr.chrg.cpMin = from;
1214     tr.chrg.cpMax = to;
1215     tr.lpstrText = (WCHAR *)lParam;
1216     return RichEditANSIWndProc(hWnd, EM_GETTEXTRANGE, 0, (LPARAM)&tr);
1217   }
1218   case EM_GETTEXTRANGE:
1219   {
1220     TEXTRANGEW *rng = (TEXTRANGEW *)lParam;
1221     if (IsWindowUnicode(hWnd))
1222       return ME_GetTextW(editor, rng->lpstrText, rng->chrg.cpMin, rng->chrg.cpMax-rng->chrg.cpMin, FALSE);
1223     else
1224     {
1225       int nLen = rng->chrg.cpMax-rng->chrg.cpMin;
1226       WCHAR *p = ALLOC_N_OBJ(WCHAR, nLen+1);
1227       int nChars = ME_GetTextW(editor, p, rng->chrg.cpMin, nLen, FALSE);
1228       /* FIXME this is a potential security hole (buffer overrun)
1229          if you know more about wchar->mbyte conversion please explain
1230       */
1231       WideCharToMultiByte(CP_ACP, 0, p, nChars+1, (char *)rng->lpstrText, nLen+1, NULL, NULL);
1232       FREE_OBJ(p);
1233       return nChars;
1234     }
1235     return ME_GetTextW(editor, rng->lpstrText, rng->chrg.cpMin, rng->chrg.cpMax-rng->chrg.cpMin, FALSE);
1236   }
1237   case EM_GETLINECOUNT:
1238   {
1239     ME_DisplayItem *item = editor->pBuffer->pFirst->next;
1240     int nRows = 0;
1241
1242     while (item != editor->pBuffer->pLast)
1243     {
1244       assert(item->type == diParagraph);
1245       nRows += item->member.para.nRows;
1246       item = item->member.para.next_para;
1247     }
1248     return max(1, nRows);
1249   }
1250   case WM_CREATE:
1251     ME_CommitUndo(editor);
1252     ME_WrapMarkedParagraphs(editor);
1253     ME_MoveCaret(editor);
1254     return 0;
1255   case WM_DESTROY:
1256     ME_DestroyEditor(editor);
1257     SetWindowLongW(hWnd, 0, 0);
1258     return 0;
1259   case WM_LBUTTONDOWN:
1260     SetFocus(hWnd);
1261     ME_LButtonDown(editor, (short)LOWORD(lParam), (short)HIWORD(lParam));
1262     SetCapture(hWnd);
1263     break;
1264   case WM_MOUSEMOVE:
1265     if (GetCapture() == hWnd)
1266       ME_MouseMove(editor, (short)LOWORD(lParam), (short)HIWORD(lParam));
1267     break;
1268   case WM_LBUTTONUP:
1269     if (GetCapture() == hWnd)
1270       ReleaseCapture();
1271     break;
1272   case WM_PAINT:
1273     hDC = BeginPaint(hWnd, &ps);
1274     ME_PaintContent(editor, hDC, FALSE, &ps.rcPaint);
1275     EndPaint(hWnd, &ps);
1276     break;
1277   case WM_SETFOCUS:
1278     ME_ShowCaret(editor);
1279     ME_SendOldNotify(editor, EN_SETFOCUS);
1280     return 0;
1281   case WM_KILLFOCUS:
1282     ME_HideCaret(editor);
1283     ME_SendOldNotify(editor, EN_KILLFOCUS);
1284     return 0;
1285   case WM_ERASEBKGND:
1286   {
1287     HDC hDC = (HDC)wParam;
1288     RECT rc;
1289     COLORREF rgbBG = ME_GetBackColor(editor);
1290     if (GetUpdateRect(hWnd,&rc,TRUE))
1291     {
1292       HBRUSH hbr = CreateSolidBrush(rgbBG);
1293       FillRect(hDC, &rc, hbr);
1294       DeleteObject(hbr);
1295     }
1296     return 1;
1297   }
1298   case WM_COMMAND:
1299     TRACE("editor wnd command = %d\n", LOWORD(wParam));
1300     return 0;
1301   case WM_KEYDOWN:
1302     if (ME_ArrowKey(editor, LOWORD(wParam), GetKeyState(VK_CONTROL)<0)) {
1303       ME_CommitUndo(editor);
1304       ME_EnsureVisible(editor, editor->pCursors[0].pRun);
1305       HideCaret(hWnd);
1306       ME_MoveCaret(editor);
1307       ShowCaret(hWnd);
1308       return 0;
1309     }
1310     if (GetKeyState(VK_CONTROL)<0)
1311     {
1312       if (LOWORD(wParam)=='W')
1313       {
1314         CHARFORMAT2W chf;
1315         char buf[2048];
1316         ME_GetSelectionCharFormat(editor, &chf);
1317         ME_DumpStyleToBuf(&chf, buf);
1318         MessageBoxA(NULL, buf, "Style dump", MB_OK);
1319       }
1320       if (LOWORD(wParam)=='Q')
1321       {
1322         ME_CheckCharOffsets(editor);
1323       }
1324     }
1325     goto do_default;
1326   case WM_CHAR:
1327   {
1328     WCHAR wstr;
1329     if (GetWindowLongW(editor->hWnd, GWL_STYLE) & ES_READONLY) {
1330       MessageBeep(MB_ICONERROR);
1331       return 0; /* FIXME really 0 ? */
1332     }
1333     wstr = LOWORD(wParam);
1334     if (((unsigned)wstr)>=' ' || wstr=='\r' || wstr=='\t') {
1335       /* FIXME maybe it would make sense to call EM_REPLACESEL instead ? */
1336       ME_Style *style = ME_GetInsertStyle(editor, 0);
1337       ME_SaveTempStyle(editor);
1338       ME_InsertTextFromCursor(editor, 0, &wstr, 1, style);
1339       ME_ReleaseStyle(style);
1340       ME_CommitUndo(editor);
1341       ME_UpdateRepaint(editor);
1342     }
1343     return 0;
1344   }
1345   case WM_VSCROLL:
1346   {
1347     int nPos = editor->nScrollPosY;
1348     si.cbSize = sizeof(SCROLLINFO);
1349     si.fMask = SIF_PAGE|SIF_POS|SIF_RANGE|SIF_TRACKPOS;
1350     GetScrollInfo(hWnd, SB_VERT, &si);
1351     switch(LOWORD(wParam)) {
1352     case SB_LINEUP:
1353       nPos -= 24; /* FIXME follow the original */
1354       if (nPos<0) nPos = 0;
1355       break;
1356     case SB_LINEDOWN:
1357     {
1358       int nEnd = editor->nTotalLength - editor->sizeWindow.cy;
1359       nPos += 24; /* FIXME follow the original */
1360       if (nPos>=nEnd) nPos = nEnd;
1361       break;
1362     }
1363     case SB_PAGEUP:
1364       nPos -= editor->sizeWindow.cy;
1365       if (nPos<0) nPos = 0;
1366       break;
1367     case SB_PAGEDOWN:
1368       nPos += editor->sizeWindow.cy;
1369       if (nPos>=editor->nTotalLength) nPos = editor->nTotalLength-1;
1370       break;
1371     case SB_THUMBTRACK:
1372     case SB_THUMBPOSITION:
1373       nPos = si.nTrackPos;
1374       break;
1375     }
1376     if (nPos != editor->nScrollPosY) {
1377       ScrollWindow(hWnd, 0, editor->nScrollPosY-nPos, NULL, NULL);
1378       editor->nScrollPosY = nPos;
1379       SetScrollPos(hWnd, SB_VERT, nPos, TRUE);
1380       UpdateWindow(hWnd);
1381     }
1382     break;
1383   }
1384   case WM_MOUSEWHEEL:
1385   {
1386     int gcWheelDelta = 0, nPos = editor->nScrollPosY, nEnd = editor->nTotalLength - editor->sizeWindow.cy;
1387     UINT pulScrollLines;
1388     SystemParametersInfoW(SPI_GETWHEELSCROLLLINES,0, &pulScrollLines, 0);
1389     gcWheelDelta -= GET_WHEEL_DELTA_WPARAM(wParam);
1390     if (abs(gcWheelDelta) >= WHEEL_DELTA && pulScrollLines)
1391       nPos += pulScrollLines * (gcWheelDelta / WHEEL_DELTA) * 8; /* FIXME follow the original */
1392     if (nPos>=nEnd)
1393       nPos = nEnd;
1394     if (nPos<0)
1395       nPos = 0;
1396     if (nPos != editor->nScrollPosY) {
1397       ScrollWindow(hWnd, 0, editor->nScrollPosY-nPos, NULL, NULL);
1398       editor->nScrollPosY = nPos;
1399       SetScrollPos(hWnd, SB_VERT, nPos, TRUE);
1400       UpdateWindow(hWnd);
1401     }
1402     break;
1403   }
1404   case WM_SIZE:
1405   {
1406     ME_MarkAllForWrapping(editor);
1407     ME_WrapMarkedParagraphs(editor);
1408     ME_UpdateScrollBar(editor);
1409     ME_Repaint(editor);
1410     return DefWindowProcW(hWnd, msg, wParam, lParam);
1411   }
1412   case EM_GETOLEINTERFACE:
1413   {
1414     LPVOID *ppvObj = (LPVOID*) lParam;
1415     FIXME("EM_GETOLEINTERFACE %p: stub\n", ppvObj);
1416     return CreateIRichEditOle(ppvObj);
1417   }
1418   default:
1419   do_default:
1420     return DefWindowProcW(hWnd, msg, wParam, lParam);
1421   }
1422   return 0L;
1423 }
1424
1425 /******************************************************************
1426  *        RichEdit10ANSIWndProc (RICHED20.9)
1427  */
1428 LRESULT WINAPI RichEdit10ANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
1429 {
1430   /* FIXME: this is NOT the same as 2.0 version */
1431   return RichEditANSIWndProc(hWnd, msg, wParam, lParam);
1432 }
1433
1434 void ME_SendOldNotify(ME_TextEditor *editor, int nCode)
1435 {
1436   HWND hWnd = editor->hWnd;
1437   SendMessageA(GetParent(hWnd), WM_COMMAND, (nCode<<16)|GetWindowLongW(hWnd, GWLP_ID), (LPARAM)hWnd);
1438 }
1439
1440 int ME_CountParagraphsBetween(ME_TextEditor *editor, int from, int to)
1441 {
1442   ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
1443   int i = 0;
1444
1445   while(item && item->member.para.next_para->member.para.nCharOfs <= from)
1446     item = item->member.para.next_para;
1447   if (!item)
1448     return 0;
1449   while(item && item->member.para.next_para->member.para.nCharOfs <= to) {
1450     item = item->member.para.next_para;
1451     i++;
1452   }
1453   return i;
1454 }
1455
1456
1457 int ME_GetTextW(ME_TextEditor *editor, WCHAR *buffer, int nStart, int nChars, int bCRLF)
1458 {
1459   ME_DisplayItem *item = ME_FindItemAtOffset(editor, diRun, nStart, &nStart);
1460   int nWritten = 0;
1461
1462   if (!item) {
1463     *buffer = L'\0';
1464     return 0;
1465   }
1466   assert(item);
1467
1468   if (nStart)
1469   {
1470     int nLen = ME_StrLen(item->member.run.strText) - nStart;
1471     if (nLen > nChars)
1472       nLen = nChars;
1473     CopyMemory(buffer, item->member.run.strText->szData + nStart, sizeof(WCHAR)*nLen);
1474     nChars -= nLen;
1475     nWritten += nLen;
1476     if (!nChars)
1477       return nWritten;
1478     buffer += nLen;
1479     nStart = 0;
1480     item = ME_FindItemFwd(item, diRun);
1481   }
1482
1483   while(nChars && item)
1484   {
1485     int nLen = ME_StrLen(item->member.run.strText);
1486     if (nLen > nChars)
1487       nLen = nChars;
1488
1489     if (item->member.run.nFlags & MERF_ENDPARA)
1490     {
1491       if (bCRLF) {
1492         *buffer++ = '\r';
1493         nWritten++;
1494       }
1495       *buffer = '\n';
1496       assert(nLen == 1);
1497     }
1498     else
1499       CopyMemory(buffer, item->member.run.strText->szData, sizeof(WCHAR)*nLen);
1500     nChars -= nLen;
1501     nWritten += nLen;
1502     buffer += nLen;
1503
1504     if (!nChars)
1505     {
1506       *buffer = L'\0';
1507       return nWritten;
1508     }
1509     item = ME_FindItemFwd(item, diRun);
1510   }
1511   *buffer = L'\0';
1512   return nWritten;
1513 }
1514
1515 void ME_RegisterEditorClass(HINSTANCE hInstance)
1516 {
1517   BOOL bResult;
1518   WNDCLASSW wcW;
1519   WNDCLASSA wcA;
1520
1521   wcW.style = CS_HREDRAW | CS_VREDRAW | CS_GLOBALCLASS;
1522   wcW.lpfnWndProc = RichEditANSIWndProc;
1523   wcW.cbClsExtra = 0;
1524   wcW.cbWndExtra = 4;
1525   wcW.hInstance = NULL; /* hInstance would register DLL-local class */
1526   wcW.hIcon = NULL;
1527   wcW.hCursor = LoadCursorW(NULL, MAKEINTRESOURCEW(IDC_IBEAM));
1528   wcW.hbrBackground = (HBRUSH)GetStockObject(NULL_BRUSH);
1529   wcW.lpszMenuName = NULL;
1530   wcW.lpszClassName = wszClassName;
1531   bResult = RegisterClassW(&wcW);
1532   assert(bResult);
1533   wcW.lpszClassName = wszClassName50;
1534   bResult = RegisterClassW(&wcW);
1535   assert(bResult);
1536
1537   wcA.style = CS_HREDRAW | CS_VREDRAW | CS_GLOBALCLASS;
1538   wcA.lpfnWndProc = RichEditANSIWndProc;
1539   wcA.cbClsExtra = 0;
1540   wcA.cbWndExtra = 4;
1541   wcA.hInstance = NULL; /* hInstance would register DLL-local class */
1542   wcA.hIcon = NULL;
1543   wcA.hCursor = LoadCursorW(NULL, MAKEINTRESOURCEW(IDC_IBEAM));
1544   wcA.hbrBackground = (HBRUSH)GetStockObject(NULL_BRUSH);
1545   wcA.lpszMenuName = NULL;
1546   wcA.lpszClassName = "RichEdit20A";
1547   bResult = RegisterClassA(&wcA);
1548   assert(bResult);
1549   wcA.lpszClassName = "RichEdit50A";
1550   bResult = RegisterClassA(&wcA);
1551   assert(bResult);
1552 }
1553 /******************************************************************
1554  *        CreateTextServices (RICHED20.4)
1555  *
1556  * FIXME should be ITextHost instead of void*
1557  */
1558 HRESULT WINAPI CreateTextServices(IUnknown *punkOuter, void *pITextHost,
1559     IUnknown **ppUnk)
1560 {
1561   FIXME("stub\n");
1562   /* FIXME should support aggregation */
1563   if (punkOuter)
1564     return CLASS_E_NOAGGREGATION;
1565
1566   return E_FAIL; /* E_NOTIMPL isn't allowed by MSDN */
1567 }
1568
1569 /******************************************************************
1570  *        REExtendedRegisterClass (RICHED20.8)
1571  *
1572  * FIXME undocumented
1573  */
1574 void WINAPI REExtendedRegisterClass(void)
1575 {
1576   FIXME("stub\n");
1577 }