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
  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 (can't fall back to text when the RTF isn't really RTF)
 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 ME_TextBuffer *ME_MakeText() {
 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 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       break;
 325     case rtfStrikeThru:
 326       fmt.dwMask = CFM_STRIKEOUT;
 327       fmt.dwEffects = info->rtfParam ? fmt.dwMask : 0;
 328       break;
 329     case rtfBackColor:
 330       fmt.dwMask = CFM_BACKCOLOR;
 331       fmt.dwEffects = 0;
 332       if (info->rtfParam == 0)
 333         fmt.dwEffects = CFE_AUTOBACKCOLOR;
 334       else if (info->rtfParam != rtfNoParam)
 335       {
 336         RTFColor *c = RTFGetColor(info, info->rtfParam);
 337         fmt.crTextColor = (c->rtfCBlue<<16)|(c->rtfCGreen<<8)|(c->rtfCRed);
 338       }
 339       break;
 340     case rtfForeColor:
 341       fmt.dwMask = CFM_COLOR;
 342       fmt.dwEffects = 0;
 343       if (info->rtfParam == 0)
 344         fmt.dwEffects = CFE_AUTOCOLOR;
 345       else if (info->rtfParam != rtfNoParam)
 346       {
 347         RTFColor *c = RTFGetColor(info, info->rtfParam);
 348         fmt.crTextColor = (c->rtfCBlue<<16)|(c->rtfCGreen<<8)|(c->rtfCRed);
 349       }
 350       break;
 351     case rtfFontNum:
 352       if (info->rtfParam != rtfNoParam)
 353       {
 354         RTFFont *f = RTFGetFont(info, info->rtfParam);
 355         if (f)
 356         {
 357           MultiByteToWideChar(CP_ACP, 0, f->rtfFName, -1, fmt.szFaceName, sizeof(fmt.szFaceName)/sizeof(WCHAR));
 358           fmt.szFaceName[sizeof(fmt.szFaceName)/sizeof(WCHAR)-1] = '\0';
 359           fmt.bCharSet = f->rtfFCharSet;
 360           fmt.dwMask = CFM_FACE | CFM_CHARSET;
 361         }
 362       }
 363       break;
 364     case rtfFontSize:
 365       fmt.dwMask = CFM_SIZE;
 366       if (info->rtfParam != rtfNoParam)
 367         fmt.yHeight = info->rtfParam*10;
 368       break;
 369   }
 370   if (fmt.dwMask) {
 371     ME_Style *style2;
 372     RTFFlushOutputBuffer(info);
 373     /* FIXME too slow ? how come ? */
 374     style2 = ME_ApplyStyle(info->style, &fmt);
 375     ME_ReleaseStyle(info->style);
 376     info->style = style2;
 377   }
 378 }
 379
 380 /* FIXME this function doesn't get any information about context of the RTF tag, which is very bad,
 381    the same tags mean different things in different contexts */
 382 void ME_RTFParAttrHook(RTF_Info *info)
 383 {
 384   PARAFORMAT2 fmt;
 385   fmt.cbSize = sizeof(fmt);
 386   fmt.dwMask = 0;
 387
 388   switch(info->rtfMinor)
 389   {
 390   case rtfParDef: /* I'm not 100% sure what does it do, but I guess it restores default paragraph attributes */
 391     fmt.dwMask = PFM_ALIGNMENT | PFM_TABSTOPS | PFM_OFFSET | PFM_STARTINDENT;
 392     fmt.wAlignment = PFA_LEFT;
 393     fmt.cTabCount = 0;
 394     fmt.dxOffset = fmt.dxStartIndent = 0;
 395     break;
 396   case rtfFirstIndent:
 397     ME_GetSelectionParaFormat(info->editor, &fmt);
 398     fmt.dwMask = PFM_STARTINDENT;
 399     fmt.dxStartIndent = info->rtfParam + fmt.dxOffset;
 400     break;
 401   case rtfLeftIndent:
 402   {
 403     int first, left;
 404     ME_GetSelectionParaFormat(info->editor, &fmt);
 405     first = fmt.dxStartIndent;
 406     left = info->rtfParam;
 407     fmt.dwMask = PFM_STARTINDENT|PFM_OFFSET;
 408     fmt.dxStartIndent = first + left;
 409     fmt.dxOffset = -first;
 410     break;
 411   }
 412   case rtfRightIndent:
 413     fmt.dwMask = PFM_RIGHTINDENT;
 414     fmt.dxRightIndent = info->rtfParam;
 415     break;
 416   case rtfQuadLeft:
 417   case rtfQuadJust:
 418     fmt.dwMask = PFM_ALIGNMENT;
 419     fmt.wAlignment = PFA_LEFT;
 420     break;
 421   case rtfQuadRight:
 422     fmt.dwMask = PFM_ALIGNMENT;
 423     fmt.wAlignment = PFA_RIGHT;
 424     break;
 425   case rtfQuadCenter:
 426     fmt.dwMask = PFM_ALIGNMENT;
 427     fmt.wAlignment = PFA_CENTER;
 428     break;
 429   case rtfTabPos:
 430     ME_GetSelectionParaFormat(info->editor, &fmt);
 431     if (!(fmt.dwMask & PFM_TABSTOPS))
 432     {
 433       fmt.dwMask |= PFM_TABSTOPS;
 434       fmt.cTabCount = 0;
 435     }
 436     if (fmt.cTabCount < MAX_TAB_STOPS)
 437       fmt.rgxTabs[fmt.cTabCount++] = info->rtfParam;
 438     break;
 439   }
 440   if (fmt.dwMask) {
 441     RTFFlushOutputBuffer(info);
 442     /* FIXME too slow ? how come ?*/
 443     ME_SetSelectionParaFormat(info->editor, &fmt);
 444   }
 445 }
 446
 447 void ME_RTFReadHook(RTF_Info *info) {
 448   switch(info->rtfClass)
 449   {
 450     case rtfGroup:
 451       switch(info->rtfMajor)
 452       {
 453         case rtfBeginGroup:
 454           if (info->stackTop < maxStack) {
 455             memcpy(&info->stack[info->stackTop].fmt, &info->style->fmt, sizeof(CHARFORMAT2W));
 456             info->stack[info->stackTop].codePage = info->codePage;
 457             info->stack[info->stackTop].unicodeLength = info->unicodeLength;
 458           }
 459           info->stackTop++;
 460           break;
 461         case rtfEndGroup:
 462         {
 463           ME_Style *s;
 464           RTFFlushOutputBuffer(info);
 465           info->stackTop--;
 466           /* FIXME too slow ? how come ? */
 467           s = ME_ApplyStyle(info->style, &info->stack[info->stackTop].fmt);
 468           ME_ReleaseStyle(info->style);
 469           info->style = s;
 470           info->codePage = info->stack[info->stackTop].codePage;
 471           info->unicodeLength = info->stack[info->stackTop].unicodeLength;
 472           break;
 473         }
 474       }
 475       break;
 476     case rtfControl:
 477       switch(info->rtfMajor)
 478       {
 479         case rtfCharAttr:
 480           ME_RTFCharAttrHook(info);
 481           break;
 482         case rtfParAttr:
 483           ME_RTFParAttrHook(info);
 484           break;
 485       }
 486       break;
 487   }
 488 }
 489
 490 void
 491 ME_StreamInFill(ME_InStream *stream)
 492 {
 493   stream->editstream->dwError = stream->editstream->pfnCallback(stream->editstream->dwCookie,
 494                                                                 stream->buffer,
 495                                                                 sizeof(stream->buffer),
 496                                                                 &stream->dwSize);
 497   stream->dwUsed = 0;
 498 }
 499
 500 static LRESULT ME_StreamIn(ME_TextEditor *editor, DWORD format, EDITSTREAM *stream)
 501 {
 502   RTF_Info parser;
 503   ME_Style *style;
 504   int from, to, to2, nUndoMode;
 505   ME_UndoItem *pUI;
 506   int nEventMask = editor->nEventMask;
 507   ME_InStream inStream;
 508
 509   TRACE("stream==%p hWnd==%p format==0x%X\n", stream, editor->hWnd, (UINT)format);
 510   editor->nEventMask = 0;
 511
 512   ME_GetSelection(editor, &from, &to);
 513   if (format & SFF_SELECTION) {
 514     style = ME_GetSelectionInsertStyle(editor);
 515
 516     ME_InternalDeleteText(editor, from, to-from);
 517   }
 518   else {
 519     style = editor->pBuffer->pDefaultStyle;
 520     ME_AddRefStyle(style);
 521     SendMessageA(editor->hWnd, EM_SETSEL, 0, 0);
 522     ME_InternalDeleteText(editor, 0, ME_GetTextLength(editor));
 523     from = to = 0;
 524     ME_ClearTempStyle(editor);
 525     /* FIXME restore default paragraph formatting ! */
 526   }
 527
 528   nUndoMode = editor->nUndoMode;
 529   editor->nUndoMode = umIgnore;
 530
 531   inStream.editstream = stream;
 532   inStream.editstream->dwError = 0;
 533   inStream.dwSize = 0;
 534   inStream.dwUsed = 0;
 535
 536   if (format & SF_RTF)
 537   {
 538     /* Check if it's really RTF, and if it is not, use plain text */
 539     ME_StreamInFill(&inStream);
 540     if (!inStream.editstream->dwError)
 541     {
 542       if (strncmp(inStream.buffer, "{\\rtf1", 6) && strncmp(inStream.buffer, "{\\urtf", 6))
 543       {
 544         format &= ~SF_RTF;
 545         format |= SF_TEXT;
 546       }
 547     }
 548   }
 549
 550   if (!inStream.editstream->dwError)
 551   {
 552     if (format & SF_RTF) {
 553       /* setup the RTF parser */
 554       memset(&parser, 0, sizeof parser);
 555       RTFSetEditStream(&parser, &inStream);
 556       parser.rtfFormat = format&(SF_TEXT|SF_RTF);
 557       parser.hwndEdit = editor->hWnd;
 558       parser.editor = editor;
 559       parser.style = style;
 560       WriterInit(&parser);
 561       RTFInit(&parser);
 562       RTFSetReadHook(&parser, ME_RTFReadHook);
 563       BeginFile(&parser);
 564
 565       /* do the parsing */
 566       RTFRead(&parser);
 567       RTFFlushOutputBuffer(&parser);
 568       RTFDestroy(&parser);
 569
 570       style = parser.style;
 571     }
 572     else if (format & SF_TEXT)
 573       ME_StreamInText(editor, format, &inStream, style);
 574     else
 575       ERR("EM_STREAMIN without SF_TEXT or SF_RTF\n");
 576     ME_GetSelection(editor, &to, &to2);
 577     /* put the cursor at the top */
 578     if (!(format & SFF_SELECTION))
 579       SendMessageA(editor->hWnd, EM_SETSEL, 0, 0);
 580     else
 581     {
 582       /* FIXME where to put cursor now ? */
 583     }
 584   }
 585
 586   editor->nUndoMode = nUndoMode;
 587   pUI = ME_AddUndoItem(editor, diUndoDeleteRun, NULL);
 588   TRACE("from %d to %d\n", from, to);
 589   if (pUI && from < to)
 590   {
 591     pUI->nStart = from;
 592     pUI->nLen = to-from;
 593   }
 594   ME_CommitUndo(editor);
 595   ME_ReleaseStyle(style);
 596   editor->nEventMask = nEventMask;
 597   InvalidateRect(editor->hWnd, NULL, TRUE);
 598   ME_UpdateRepaint(editor);
 599   if (!(format & SFF_SELECTION)) {
 600     ME_ClearTempStyle(editor);
 601   }
 602   ME_MoveCaret(editor);
 603   ME_SendSelChange(editor);
 604
 605   return 0;
 606 }
 607
 608
 609 ME_DisplayItem *
 610 ME_FindItemAtOffset(ME_TextEditor *editor, ME_DIType nItemType, int nOffset, int *nItemOffset)
 611 {
 612   ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
 613
 614   while (item && item->member.para.next_para->member.para.nCharOfs <= nOffset)
 615     item = ME_FindItemFwd(item, diParagraph);
 616
 617   if (!item)
 618     return item;
 619
 620   nOffset -= item->member.para.nCharOfs;
 621   if (nItemType == diParagraph) {
 622     if (nItemOffset)
 623       *nItemOffset = nOffset;
 624     return item;
 625   }
 626
 627   do {
 628     item = ME_FindItemFwd(item, diRun);
 629   } while (item && (item->member.run.nCharOfs + ME_StrLen(item->member.run.strText) <= nOffset));
 630   if (item) {
 631     nOffset -= item->member.run.nCharOfs;
 632     if (nItemOffset)
 633       *nItemOffset = nOffset;
 634   }
 635   return item;
 636 }
 637
 638
 639 ME_TextEditor *ME_MakeEditor(HWND hWnd) {
 640   ME_TextEditor *ed = ALLOC_OBJ(ME_TextEditor);
 641   HDC hDC;
 642   int i;
 643   ed->hWnd = hWnd;
 644   ed->pBuffer = ME_MakeText();
 645   hDC = GetDC(hWnd);
 646   ME_MakeFirstParagraph(hDC, ed->pBuffer);
 647   ReleaseDC(hWnd, hDC);
 648   ed->bCaretShown = FALSE;
 649   ed->nCursors = 3;
 650   ed->pCursors = ALLOC_N_OBJ(ME_Cursor, ed->nCursors);
 651   ed->pCursors[0].pRun = ME_FindItemFwd(ed->pBuffer->pFirst, diRun);
 652   ed->pCursors[0].nOffset = 0;
 653   ed->pCursors[1].pRun = ME_FindItemFwd(ed->pBuffer->pFirst, diRun);
 654   ed->pCursors[1].nOffset = 0;
 655   ed->nLastTotalLength = ed->nTotalLength = 0;
 656   ed->nUDArrowX = -1;
 657   ed->nSequence = 0;
 658   ed->rgbBackColor = -1;
 659   ed->bCaretAtEnd = FALSE;
 660   ed->nEventMask = 0;
 661   ed->nModifyStep = 0;
 662   ed->pUndoStack = ed->pRedoStack = NULL;
 663   ed->nUndoMode = umAddToUndo;
 664   ed->nParagraphs = 1;
 665   ed->nLastSelStart = ed->nLastSelEnd = 0;
 666   ed->nScrollPosY = 0;
 667   for (i=0; i<HFONT_CACHE_SIZE; i++)
 668   {
 669     ed->pFontCache[i].nRefs = 0;
 670     ed->pFontCache[i].nAge = 0;
 671     ed->pFontCache[i].hFont = NULL;
 672   }
 673   ME_CheckCharOffsets(ed);
 674   return ed;
 675 }
 676
 677 typedef struct tagME_GlobalDestStruct
 678 {
 679   HGLOBAL hData;
 680   int nLength;
 681 } ME_GlobalDestStruct;
 682
 683 static DWORD CALLBACK ME_AppendToHGLOBAL(DWORD_PTR dwCookie, LPBYTE lpBuff, LONG cb, LONG *pcb)
 684 {
 685   ME_GlobalDestStruct *pData = (ME_GlobalDestStruct *)dwCookie;
 686   int nMaxSize;
 687   BYTE *pDest;
 688
 689   nMaxSize = GlobalSize(pData->hData);
 690   if (pData->nLength+cb+1 >= cb)
 691   {
 692     /* round up to 2^17 */
 693     int nNewSize = (((nMaxSize+cb+1)|0x1FFFF)+1) & 0xFFFE0000;
 694     pData->hData = GlobalReAlloc(pData->hData, nNewSize, 0);
 695   }
 696   pDest = (BYTE *)GlobalLock(pData->hData);
 697   memcpy(pDest + pData->nLength, lpBuff, cb);
 698   pData->nLength += cb;
 699   pDest[pData->nLength] = '\0';
 700   GlobalUnlock(pData->hData);
 701   *pcb = cb;
 702
 703   return 0;
 704 }
 705
 706 static DWORD CALLBACK ME_ReadFromHGLOBALUnicode(DWORD_PTR dwCookie, LPBYTE lpBuff, LONG cb, LONG *pcb)
 707 {
 708   ME_GlobalDestStruct *pData = (ME_GlobalDestStruct *)dwCookie;
 709   int i;
 710   WORD *pSrc, *pDest;
 711
 712   cb = cb >> 1;
 713   pDest = (WORD *)lpBuff;
 714   pSrc = (WORD *)GlobalLock(pData->hData);
 715   for (i = 0; i<cb && pSrc[pData->nLength+i]; i++) {
 716     pDest[i] = pSrc[pData->nLength+i];
 717   }
 718   pData->nLength += i;
 719   *pcb = 2*i;
 720   GlobalUnlock(pData->hData);
 721   return 0;
 722 }
 723
 724 static DWORD CALLBACK ME_ReadFromHGLOBALRTF(DWORD_PTR dwCookie, LPBYTE lpBuff, LONG cb, LONG *pcb)
 725 {
 726   ME_GlobalDestStruct *pData = (ME_GlobalDestStruct *)dwCookie;
 727   int i;
 728   BYTE *pSrc, *pDest;
 729
 730   pDest = lpBuff;
 731   pSrc = (BYTE *)GlobalLock(pData->hData);
 732   for (i = 0; i<cb && pSrc[pData->nLength+i]; i++) {
 733     pDest[i] = pSrc[pData->nLength+i];
 734   }
 735   pData->nLength += i;
 736   *pcb = i;
 737   GlobalUnlock(pData->hData);
 738   return 0;
 739 }
 740
 741 void ME_DestroyEditor(ME_TextEditor *editor)
 742 {
 743   ME_DisplayItem *pFirst = editor->pBuffer->pFirst;
 744   ME_DisplayItem *p = pFirst, *pNext = NULL;
 745   int i;
 746
 747   ME_ClearTempStyle(editor);
 748   ME_EmptyUndoStack(editor);
 749   while(p) {
 750     pNext = p->next;
 751     ME_DestroyDisplayItem(p);
 752     p = pNext;
 753   }
 754   ME_ReleaseStyle(editor->pBuffer->pDefaultStyle);
 755   for (i=0; i<HFONT_CACHE_SIZE; i++)
 756   {
 757     if (editor->pFontCache[i].hFont)
 758       DeleteObject(editor->pFontCache[i].hFont);
 759   }
 760
 761   FREE_OBJ(editor);
 762 }
 763
 764 static WCHAR wszClassName[] = {'R', 'i', 'c', 'h', 'E', 'd', 'i', 't', '2', '0', 'W', 0};
 765 static WCHAR wszClassName50[] = {'R', 'i', 'c', 'h', 'E', 'd', 'i', 't', '5', '0', 'W', 0};
 766
 767 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 768 {
 769     TRACE("\n");
 770     switch (fdwReason)
 771     {
 772     case DLL_PROCESS_ATTACH:
 773       DisableThreadLibraryCalls(hinstDLL);
 774       me_heap = HeapCreate (0, 0x10000, 0);
 775       ME_RegisterEditorClass(hinstDLL);
 776       break;
 777
 778     case DLL_PROCESS_DETACH:
 779       UnregisterClassW(wszClassName, 0);
 780       UnregisterClassW(wszClassName50, 0);
 781       UnregisterClassA("RichEdit20A", 0);
 782       UnregisterClassA("RichEdit50A", 0);
 783       HeapDestroy (me_heap);
 784       me_heap = NULL;
 785       break;
 786     }
 787     return TRUE;
 788 }
 789
 790
 791 #define UNSUPPORTED_MSG(e) \
 792   case e: \
 793     FIXME(#e ": stub\n"); \
 794     return DefWindowProcW(hWnd, msg, wParam, lParam);
 795
 796 /******************************************************************
 797  *        RichEditANSIWndProc (RICHED20.10)
 798  */
 799 LRESULT WINAPI RichEditANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) {
 800   HDC hDC;
 801   PAINTSTRUCT ps;
 802   SCROLLINFO si;
 803   ME_TextEditor *editor = (ME_TextEditor *)GetWindowLongW(hWnd, 0);
 804   TRACE("msg %d %08x %08lx\n", msg, wParam, lParam);
 805   switch(msg) {
 806
 807   UNSUPPORTED_MSG(EM_AUTOURLDETECT)
 808   UNSUPPORTED_MSG(EM_CHARFROMPOS)
 809   UNSUPPORTED_MSG(EM_DISPLAYBAND)
 810   UNSUPPORTED_MSG(EM_EXLIMITTEXT)
 811   UNSUPPORTED_MSG(EM_EXLINEFROMCHAR)
 812   UNSUPPORTED_MSG(EM_FINDTEXT)
 813   UNSUPPORTED_MSG(EM_FINDTEXTEX)
 814   UNSUPPORTED_MSG(EM_FINDWORDBREAK)
 815   UNSUPPORTED_MSG(EM_FMTLINES)
 816   UNSUPPORTED_MSG(EM_FORMATRANGE)
 817   UNSUPPORTED_MSG(EM_GETAUTOURLDETECT)
 818   UNSUPPORTED_MSG(EM_GETBIDIOPTIONS)
 819   UNSUPPORTED_MSG(EM_GETEDITSTYLE)
 820   UNSUPPORTED_MSG(EM_GETFIRSTVISIBLELINE)
 821   UNSUPPORTED_MSG(EM_GETIMECOMPMODE)
 822   /* UNSUPPORTED_MSG(EM_GETIMESTATUS) missing in Wine headers */
 823   UNSUPPORTED_MSG(EM_GETLANGOPTIONS)
 824   UNSUPPORTED_MSG(EM_GETLIMITTEXT)
 825   UNSUPPORTED_MSG(EM_GETLINE)
 826   UNSUPPORTED_MSG(EM_GETLINECOUNT)
 827   /* UNSUPPORTED_MSG(EM_GETOLEINTERFACE) separate stub */
 828   UNSUPPORTED_MSG(EM_GETOPTIONS)
 829   UNSUPPORTED_MSG(EM_GETPASSWORDCHAR)
 830   UNSUPPORTED_MSG(EM_GETRECT)
 831   UNSUPPORTED_MSG(EM_GETREDONAME)
 832   UNSUPPORTED_MSG(EM_GETSCROLLPOS)
 833   UNSUPPORTED_MSG(EM_GETTEXTEX)
 834   UNSUPPORTED_MSG(EM_GETTEXTLENGTHEX)
 835   UNSUPPORTED_MSG(EM_GETTEXTMODE)
 836   UNSUPPORTED_MSG(EM_GETTYPOGRAPHYOPTIONS)
 837   UNSUPPORTED_MSG(EM_GETUNDONAME)
 838   UNSUPPORTED_MSG(EM_GETWORDBREAKPROC)
 839   UNSUPPORTED_MSG(EM_GETWORDBREAKPROCEX)
 840   UNSUPPORTED_MSG(EM_GETZOOM)
 841   UNSUPPORTED_MSG(EM_HIDESELECTION)
 842   UNSUPPORTED_MSG(EM_LIMITTEXT) /* also known as EM_SETLIMITTEXT */
 843   UNSUPPORTED_MSG(EM_LINEFROMCHAR)
 844   UNSUPPORTED_MSG(EM_LINEINDEX)
 845   UNSUPPORTED_MSG(EM_LINELENGTH)
 846   UNSUPPORTED_MSG(EM_LINESCROLL)
 847   UNSUPPORTED_MSG(EM_PASTESPECIAL)
 848 /*  UNSUPPORTED_MSG(EM_POSFROMCHARS) missing in Wine headers */
 849   UNSUPPORTED_MSG(EM_REQUESTRESIZE)
 850   UNSUPPORTED_MSG(EM_SCROLL)
 851   UNSUPPORTED_MSG(EM_SCROLLCARET)
 852   UNSUPPORTED_MSG(EM_SELECTIONTYPE)
 853   UNSUPPORTED_MSG(EM_SETBIDIOPTIONS)
 854   UNSUPPORTED_MSG(EM_SETEDITSTYLE)
 855   UNSUPPORTED_MSG(EM_SETFONTSIZE)
 856   UNSUPPORTED_MSG(EM_SETLANGOPTIONS)
 857   UNSUPPORTED_MSG(EM_SETOLECALLBACK)
 858   UNSUPPORTED_MSG(EM_SETOPTIONS)
 859   UNSUPPORTED_MSG(EM_SETPALETTE)
 860   UNSUPPORTED_MSG(EM_SETPASSWORDCHAR)
 861   UNSUPPORTED_MSG(EM_SETRECT)
 862   UNSUPPORTED_MSG(EM_SETRECTNP)
 863   UNSUPPORTED_MSG(EM_SETSCROLLPOS)
 864   UNSUPPORTED_MSG(EM_SETTABSTOPS)
 865   UNSUPPORTED_MSG(EM_SETTARGETDEVICE)
 866   UNSUPPORTED_MSG(EM_SETTEXTEX)
 867   UNSUPPORTED_MSG(EM_SETTEXTMODE)
 868   UNSUPPORTED_MSG(EM_SETTYPOGRAPHYOPTIONS)
 869   UNSUPPORTED_MSG(EM_SETUNDOLIMIT)
 870   UNSUPPORTED_MSG(EM_SETWORDBREAKPROC)
 871   UNSUPPORTED_MSG(EM_SETWORDBREAKPROCEX)
 872   UNSUPPORTED_MSG(EM_SHOWSCROLLBAR)
 873   UNSUPPORTED_MSG(EM_SETZOOM)
 874   UNSUPPORTED_MSG(WM_SETFONT)
 875   UNSUPPORTED_MSG(WM_STYLECHANGING)
 876   UNSUPPORTED_MSG(WM_STYLECHANGED)
 877 /*  UNSUPPORTED_MSG(WM_UNICHAR) FIXME missing in Wine headers */
 878
 879 /* Messages specific to Richedit controls */
 880
 881   case EM_STREAMIN:
 882    return ME_StreamIn(editor, wParam, (EDITSTREAM*)lParam);
 883   case EM_STREAMOUT:
 884    return ME_StreamOut(editor, wParam, (EDITSTREAM *)lParam);
 885   case WM_GETDLGCODE:
 886   {
 887     UINT code = DLGC_WANTCHARS|DLGC_WANTARROWS;
 888     if (GetWindowLongW(hWnd, GWL_STYLE)&ES_WANTRETURN)
 889       code |= 0; /* FIXME what can we do here ? ask for messages and censor them ? */
 890     return code;
 891   }
 892   case WM_NCCREATE:
 893   {
 894     CREATESTRUCTW *pcs = (CREATESTRUCTW *)lParam;
 895     editor = ME_MakeEditor(hWnd);
 896     SetWindowLongW(hWnd, 0, (long)editor);
 897     pcs = 0; /* ignore */
 898     return TRUE;
 899   }
 900   case EM_EMPTYUNDOBUFFER:
 901     ME_EmptyUndoStack(editor);
 902     return 0;
 903   case EM_GETSEL:
 904   {
 905     ME_GetSelection(editor, (int *)wParam, (int *)lParam);
 906     if (!((wParam|lParam) & 0xFFFF0000))
 907       return (lParam<<16)|wParam;
 908     return -1;
 909   }
 910   case EM_EXGETSEL:
 911   {
 912     CHARRANGE *pRange = (CHARRANGE *)lParam;
 913     ME_GetSelection(editor, (int *)&pRange->cpMin, (int *)&pRange->cpMax);
 914     return 0;
 915   }
 916   case EM_CANUNDO:
 917     return editor->pUndoStack != NULL;
 918   case EM_CANREDO:
 919     return editor->pRedoStack != NULL;
 920   case EM_UNDO:
 921     ME_Undo(editor);
 922     return 0;
 923   case EM_REDO:
 924     ME_Redo(editor);
 925     return 0;
 926   case EM_SETSEL:
 927   {
 928     ME_SetSelection(editor, wParam, lParam);
 929     ME_Repaint(editor);
 930     ME_SendSelChange(editor);
 931     return 0;
 932   }
 933   case EM_EXSETSEL:
 934   {
 935     CHARRANGE *pRange = (CHARRANGE *)lParam;
 936     ME_SetSelection(editor, pRange->cpMin, pRange->cpMax);
 937     /* FIXME optimize */
 938     ME_Repaint(editor);
 939     ME_SendSelChange(editor);
 940     return 0;
 941   }
 942   case EM_SETBKGNDCOLOR:
 943   {
 944     LRESULT lColor = ME_GetBackColor(editor);
 945     if (wParam)
 946       editor->rgbBackColor = -1;
 947     else
 948       editor->rgbBackColor = lParam;
 949     InvalidateRect(hWnd, NULL, TRUE);
 950     UpdateWindow(hWnd);
 951     return lColor;
 952   }
 953   case EM_GETMODIFY:
 954     return editor->nModifyStep == 0 ? 0 : 1;
 955   case EM_SETMODIFY:
 956   {
 957     if (wParam)
 958       editor->nModifyStep = 0x80000000;
 959     else
 960       editor->nModifyStep = 0;
 961
 962     return 0;
 963   }
 964   case EM_SETREADONLY:
 965   {
 966     long nStyle = GetWindowLongW(hWnd, GWL_STYLE);
 967     if (wParam)
 968       nStyle |= ES_READONLY;
 969     else
 970       nStyle &= ~ES_READONLY;
 971     SetWindowLongW(hWnd, GWL_STYLE, nStyle);
 972     ME_Repaint(editor);
 973     return 0;
 974   }
 975   case EM_SETEVENTMASK:
 976     editor->nEventMask = lParam;
 977     return 0;
 978   case EM_GETEVENTMASK:
 979     return editor->nEventMask;
 980   case EM_SETCHARFORMAT:
 981   {
 982     CHARFORMAT2W buf, *p;
 983     BOOL bRepaint = TRUE;
 984     p = ME_ToCF2W(&buf, (CHARFORMAT2W *)lParam);
 985     if (!wParam)
 986       ME_SetDefaultCharFormat(editor, p);
 987     else if (wParam == (SCF_WORD | SCF_SELECTION))
 988       FIXME("word selection not supported\n");
 989     else if (wParam == SCF_ALL)
 990       ME_SetCharFormat(editor, 0, ME_GetTextLength(editor), p);
 991     else {
 992       int from, to;
 993       ME_GetSelection(editor, &from, &to);
 994       bRepaint = (from != to);
 995       ME_SetSelectionCharFormat(editor, p);
 996     }
 997     ME_CommitUndo(editor);
 998     if (bRepaint)
 999       ME_UpdateRepaint(editor);
1000     return 0;
1001   }
1002   case EM_GETCHARFORMAT:
1003   {
1004     CHARFORMAT2W tmp;
1005     tmp.cbSize = sizeof(tmp);
1006     if (!wParam)
1007       ME_GetDefaultCharFormat(editor, &tmp);
1008     else
1009       ME_GetSelectionCharFormat(editor, &tmp);
1010     ME_CopyToCFAny((CHARFORMAT2W *)lParam, &tmp);
1011     return 0;
1012   }
1013   case EM_SETPARAFORMAT:
1014     ME_SetSelectionParaFormat(editor, (PARAFORMAT2 *)lParam);
1015     ME_UpdateRepaint(editor);
1016     ME_CommitUndo(editor);
1017     return 0;
1018   case EM_GETPARAFORMAT:
1019     ME_GetSelectionParaFormat(editor, (PARAFORMAT2 *)lParam);
1020     return 0;
1021   case WM_CLEAR:
1022   {
1023     int from, to;
1024     ME_GetSelection(editor, &from, &to);
1025     ME_InternalDeleteText(editor, from, to-from);
1026     ME_CommitUndo(editor);
1027     ME_UpdateRepaint(editor);
1028     return 0;
1029   }
1030   case EM_REPLACESEL:
1031   {
1032     int from, to;
1033     ME_Style *style;
1034     LPWSTR wszText = ME_ToUnicode(hWnd, (void *)lParam);
1035     size_t len = lstrlenW(wszText);
1036     TRACE("EM_REPLACESEL - %s\n", debugstr_w(wszText));
1037
1038     ME_GetSelection(editor, &from, &to);
1039     style = ME_GetSelectionInsertStyle(editor);
1040     ME_InternalDeleteText(editor, from, to-from);
1041     ME_InsertTextFromCursor(editor, 0, wszText, len, style);
1042     ME_ReleaseStyle(style);
1043     ME_EndToUnicode(hWnd, wszText);
1044     /* drop temporary style if line end */
1045     /* FIXME question: does abc\n mean: put abc, clear temp style, put \n? (would require a change) */
1046     if (len>0 && wszText[len-1] == '\n')
1047       ME_ClearTempStyle(editor);
1048
1049     ME_CommitUndo(editor);
1050     if (!wParam)
1051       ME_EmptyUndoStack(editor);
1052     ME_UpdateRepaint(editor);
1053     return 0;
1054   }
1055   case WM_SETTEXT:
1056   {
1057     LPWSTR wszText = ME_ToUnicode(hWnd, (void *)lParam);
1058     TRACE("WM_SETTEXT - %s\n", (char *)(wszText)); /* debugstr_w() */
1059     ME_InternalDeleteText(editor, 0, ME_GetTextLength(editor));
1060     /* uses default style! */
1061     ME_InsertTextFromCursor(editor, 0, wszText, -1, editor->pBuffer->pDefaultStyle);
1062     ME_EndToUnicode(hWnd, wszText);
1063     ME_CommitUndo(editor);
1064     ME_EmptyUndoStack(editor);
1065     ME_UpdateRepaint(editor);
1066     return 0;
1067   }
1068   case EM_CANPASTE:
1069   {
1070     UINT nRTFFormat = RegisterClipboardFormatA("Rich Text Format");
1071     if (IsClipboardFormatAvailable(nRTFFormat))
1072       return TRUE;
1073     if (IsClipboardFormatAvailable(CF_UNICODETEXT))
1074       return TRUE;
1075     return FALSE;
1076   }
1077   case WM_PASTE:
1078   {
1079     DWORD dwFormat = 0;
1080     EDITSTREAM es;
1081     ME_GlobalDestStruct gds;
1082     UINT nRTFFormat = RegisterClipboardFormatA("Rich Text Format");
1083     UINT cf = 0;
1084
1085     if (IsClipboardFormatAvailable(nRTFFormat))
1086       cf = nRTFFormat, dwFormat = SF_RTF;
1087     else if (IsClipboardFormatAvailable(CF_UNICODETEXT))
1088       cf = CF_UNICODETEXT, dwFormat = SF_TEXT|SF_UNICODE;
1089     else
1090       return 0;
1091
1092     if (!OpenClipboard(hWnd))
1093       return 0;
1094     gds.hData = GetClipboardData(cf);
1095     gds.nLength = 0;
1096     es.dwCookie = (DWORD)&gds;
1097     es.pfnCallback = dwFormat == SF_RTF ? ME_ReadFromHGLOBALRTF : ME_ReadFromHGLOBALUnicode;
1098     SendMessageW(hWnd, EM_STREAMIN, dwFormat|SFF_SELECTION, (LPARAM)&es);
1099
1100     CloseClipboard();
1101     return 0;
1102   }
1103   case WM_CUT:
1104   case WM_COPY:
1105   {
1106     int from, to, pars;
1107     WCHAR *data;
1108     HANDLE hData;
1109     EDITSTREAM es;
1110     ME_GlobalDestStruct gds;
1111
1112     if (!OpenClipboard(hWnd))
1113       return 0;
1114
1115     EmptyClipboard();
1116     ME_GetSelection(editor, &from, &to);
1117     pars = ME_CountParagraphsBetween(editor, from, to);
1118     hData = GlobalAlloc(GMEM_MOVEABLE, sizeof(WCHAR)*(to-from+pars+1));
1119     data = (WCHAR *)GlobalLock(hData);
1120     ME_GetTextW(editor, data, from, to-from, TRUE);
1121     GlobalUnlock(hData);
1122
1123     gds.hData = GlobalAlloc(GMEM_MOVEABLE, 0);
1124     gds.nLength = 0;
1125     es.dwCookie = (DWORD)&gds;
1126     es.pfnCallback = ME_AppendToHGLOBAL;
1127     SendMessageW(hWnd, EM_STREAMOUT, SFF_SELECTION|SF_RTF, (LPARAM)&es);
1128     GlobalReAlloc(gds.hData, gds.nLength+1, 0);
1129
1130     SetClipboardData(CF_UNICODETEXT, hData);
1131     SetClipboardData(RegisterClipboardFormatA("Rich Text Format"), gds.hData);
1132
1133     CloseClipboard();
1134     if (msg == WM_CUT)
1135     {
1136       ME_InternalDeleteText(editor, from, to-from);
1137       ME_CommitUndo(editor);
1138       ME_UpdateRepaint(editor);
1139     }
1140     return 0;
1141   }
1142   case WM_GETTEXTLENGTH:
1143     return ME_GetTextLength(editor);
1144   case WM_GETTEXT:
1145   {
1146     TEXTRANGEW tr; /* W and A differ only by rng->lpstrText */
1147     tr.chrg.cpMin = 0;
1148     tr.chrg.cpMax = wParam-1;
1149     tr.lpstrText = (WCHAR *)lParam;
1150     return RichEditANSIWndProc(hWnd, EM_GETTEXTRANGE, 0, (LPARAM)&tr);
1151   }
1152   case EM_GETSELTEXT:
1153   {
1154     int from, to;
1155     TEXTRANGEW tr; /* W and A differ only by rng->lpstrText */
1156     ME_GetSelection(editor, &from, &to);
1157     tr.chrg.cpMin = from;
1158     tr.chrg.cpMax = to;
1159     tr.lpstrText = (WCHAR *)lParam;
1160     return RichEditANSIWndProc(hWnd, EM_GETTEXTRANGE, 0, (LPARAM)&tr);
1161   }
1162   case EM_GETTEXTRANGE:
1163   {
1164     TEXTRANGEW *rng = (TEXTRANGEW *)lParam;
1165     if (IsWindowUnicode(hWnd))
1166       return ME_GetTextW(editor, rng->lpstrText, rng->chrg.cpMin, rng->chrg.cpMax-rng->chrg.cpMin, FALSE);
1167     else
1168     {
1169       int nLen = rng->chrg.cpMax-rng->chrg.cpMin;
1170       WCHAR *p = ALLOC_N_OBJ(WCHAR, nLen+1);
1171       int nChars = ME_GetTextW(editor, p, rng->chrg.cpMin, nLen, FALSE);
1172       /* FIXME this is a potential security hole (buffer overrun)
1173          if you know more about wchar->mbyte conversion please explain
1174       */
1175       WideCharToMultiByte(CP_ACP, 0, p, nChars+1, (char *)rng->lpstrText, nLen+1, NULL, NULL);
1176       FREE_OBJ(p);
1177       return nChars;
1178     }
1179     return ME_GetTextW(editor, rng->lpstrText, rng->chrg.cpMin, rng->chrg.cpMax-rng->chrg.cpMin, FALSE);
1180   }
1181   case WM_CREATE:
1182     ME_CommitUndo(editor);
1183     ME_WrapMarkedParagraphs(editor);
1184     ME_MoveCaret(editor);
1185     return 0;
1186   case WM_DESTROY:
1187     ME_DestroyEditor(editor);
1188     SetWindowLongW(hWnd, 0, 0);
1189     return 0;
1190   case WM_LBUTTONDOWN:
1191     SetFocus(hWnd);
1192     ME_LButtonDown(editor, (short)LOWORD(lParam), (short)HIWORD(lParam));
1193     SetCapture(hWnd);
1194     break;
1195   case WM_MOUSEMOVE:
1196     if (GetCapture() == hWnd)
1197       ME_MouseMove(editor, (short)LOWORD(lParam), (short)HIWORD(lParam));
1198     break;
1199   case WM_LBUTTONUP:
1200     if (GetCapture() == hWnd)
1201       ReleaseCapture();
1202     break;
1203   case WM_PAINT:
1204     hDC = BeginPaint(hWnd, &ps);
1205     ME_PaintContent(editor, hDC, FALSE, &ps.rcPaint);
1206     EndPaint(hWnd, &ps);
1207     break;
1208   case WM_SETFOCUS:
1209     ME_ShowCaret(editor);
1210     ME_SendOldNotify(editor, EN_SETFOCUS);
1211     return 0;
1212   case WM_KILLFOCUS:
1213     ME_HideCaret(editor);
1214     ME_SendOldNotify(editor, EN_KILLFOCUS);
1215     return 0;
1216   case WM_ERASEBKGND:
1217   {
1218     HDC hDC = (HDC)wParam;
1219     RECT rc;
1220     COLORREF rgbBG = ME_GetBackColor(editor);
1221     if (GetUpdateRect(hWnd,&rc,TRUE))
1222     {
1223       HBRUSH hbr = CreateSolidBrush(rgbBG);
1224       FillRect(hDC, &rc, hbr);
1225       DeleteObject(hbr);
1226     }
1227     return 1;
1228   }
1229   case WM_COMMAND:
1230     TRACE("editor wnd command = %d\n", LOWORD(wParam));
1231     return 0;
1232   case WM_KEYDOWN:
1233     if (ME_ArrowKey(editor, LOWORD(wParam), GetKeyState(VK_CONTROL)<0)) {
1234       ME_CommitUndo(editor);
1235       ME_EnsureVisible(editor, editor->pCursors[0].pRun);
1236       HideCaret(hWnd);
1237       ME_MoveCaret(editor);
1238       ShowCaret(hWnd);
1239       return 0;
1240     }
1241     if (GetKeyState(VK_CONTROL)<0)
1242     {
1243       if (LOWORD(wParam)=='W')
1244       {
1245         CHARFORMAT2W chf;
1246         char buf[2048];
1247         ME_GetSelectionCharFormat(editor, &chf);
1248         ME_DumpStyleToBuf(&chf, buf);
1249         MessageBoxA(NULL, buf, "Style dump", MB_OK);
1250       }
1251       if (LOWORD(wParam)=='Q')
1252       {
1253         ME_CheckCharOffsets(editor);
1254       }
1255     }
1256     goto do_default;
1257   case WM_CHAR:
1258   {
1259     WCHAR wstr;
1260     if (GetWindowLongW(editor->hWnd, GWL_STYLE) & ES_READONLY) {
1261       MessageBeep(MB_ICONERROR);
1262       return 0; /* FIXME really 0 ? */
1263     }
1264     wstr = LOWORD(wParam);
1265     if (((unsigned)wstr)>=' ' || wstr=='\r' || wstr=='\t') {
1266       /* FIXME maybe it would make sense to call EM_REPLACESEL instead ? */
1267       ME_Style *style = ME_GetInsertStyle(editor, 0);
1268       ME_SaveTempStyle(editor);
1269       ME_InsertTextFromCursor(editor, 0, &wstr, 1, style);
1270       ME_ReleaseStyle(style);
1271       ME_CommitUndo(editor);
1272       ME_UpdateRepaint(editor);
1273     }
1274     return 0;
1275   }
1276   case WM_VSCROLL:
1277   {
1278     int nPos = editor->nScrollPosY;
1279     si.cbSize = sizeof(SCROLLINFO);
1280     si.fMask = SIF_PAGE|SIF_POS|SIF_RANGE|SIF_TRACKPOS;
1281     GetScrollInfo(hWnd, SB_VERT, &si);
1282     switch(LOWORD(wParam)) {
1283     case SB_LINEUP:
1284       nPos -= 24; /* FIXME follow the original */
1285       if (nPos<0) nPos = 0;
1286       break;
1287     case SB_LINEDOWN:
1288     {
1289       int nEnd = editor->nTotalLength - editor->sizeWindow.cy;
1290       nPos += 24; /* FIXME follow the original */
1291       if (nPos>=nEnd) nPos = nEnd;
1292       break;
1293     }
1294     case SB_PAGEUP:
1295       nPos -= editor->sizeWindow.cy;
1296       if (nPos<0) nPos = 0;
1297       break;
1298     case SB_PAGEDOWN:
1299       nPos += editor->sizeWindow.cy;
1300       if (nPos>=editor->nTotalLength) nPos = editor->nTotalLength-1;
1301       break;
1302     case SB_THUMBTRACK:
1303     case SB_THUMBPOSITION:
1304       nPos = si.nTrackPos;
1305       break;
1306     }
1307     if (nPos != editor->nScrollPosY) {
1308       ScrollWindow(hWnd, 0, editor->nScrollPosY-nPos, NULL, NULL);
1309       editor->nScrollPosY = nPos;
1310       SetScrollPos(hWnd, SB_VERT, nPos, TRUE);
1311       UpdateWindow(hWnd);
1312     }
1313     break;
1314   }
1315   case WM_MOUSEWHEEL:
1316   {
1317     int gcWheelDelta = 0, nPos = editor->nScrollPosY;
1318     UINT pulScrollLines;
1319
1320     SystemParametersInfoW(SPI_GETWHEELSCROLLLINES,0, &pulScrollLines, 0);
1321     gcWheelDelta -= GET_WHEEL_DELTA_WPARAM(wParam);
1322     if (abs(gcWheelDelta) >= WHEEL_DELTA && pulScrollLines)
1323       nPos += pulScrollLines * (gcWheelDelta / WHEEL_DELTA) * 8;
1324     if(nPos>=editor->nTotalLength)
1325       nPos = editor->nTotalLength - 1;
1326     if (nPos<0)
1327       nPos = 0;
1328     if (nPos != editor->nScrollPosY) {
1329       ScrollWindow(hWnd, 0, editor->nScrollPosY-nPos, NULL, NULL);
1330       editor->nScrollPosY = nPos;
1331       SetScrollPos(hWnd, SB_VERT, nPos, TRUE);
1332       UpdateWindow(hWnd);
1333     }
1334     break;
1335   }
1336   case WM_SIZE:
1337   {
1338     ME_MarkAllForWrapping(editor);
1339     ME_WrapMarkedParagraphs(editor);
1340     ME_UpdateScrollBar(editor);
1341     ME_Repaint(editor);
1342     return DefWindowProcW(hWnd, msg, wParam, lParam);
1343   }
1344   case EM_GETOLEINTERFACE:
1345   {
1346     LPVOID *ppvObj = (LPVOID*) lParam;
1347     FIXME("EM_GETOLEINTERFACE %p: stub\n", ppvObj);
1348     return CreateIRichEditOle(ppvObj);
1349   }
1350   default:
1351   do_default:
1352     return DefWindowProcW(hWnd, msg, wParam, lParam);
1353   }
1354   return 0L;
1355 }
1356
1357 /******************************************************************
1358  *        RichEdit10ANSIWndProc (RICHED20.9)
1359  */
1360 LRESULT WINAPI RichEdit10ANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
1361 {
1362   /* FIXME: this is NOT the same as 2.0 version */
1363   return RichEditANSIWndProc(hWnd, msg, wParam, lParam);
1364 }
1365
1366 void ME_SendOldNotify(ME_TextEditor *editor, int nCode)
1367 {
1368   HWND hWnd = editor->hWnd;
1369   SendMessageA(GetParent(hWnd), WM_COMMAND, (nCode<<16)|GetWindowLongW(hWnd, GWLP_ID), (LPARAM)hWnd);
1370 }
1371
1372 int ME_CountParagraphsBetween(ME_TextEditor *editor, int from, int to)
1373 {
1374   ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
1375   int i = 0;
1376
1377   while(item && item->member.para.next_para->member.para.nCharOfs <= from)
1378     item = item->member.para.next_para;
1379   if (!item)
1380     return 0;
1381   while(item && item->member.para.next_para->member.para.nCharOfs <= to) {
1382     item = item->member.para.next_para;
1383     i++;
1384   }
1385   return i;
1386 }
1387
1388
1389 int ME_GetTextW(ME_TextEditor *editor, WCHAR *buffer, int nStart, int nChars, int bCRLF)
1390 {
1391   ME_DisplayItem *item = ME_FindItemAtOffset(editor, diRun, nStart, &nStart);
1392   int nWritten = 0;
1393
1394   if (!item) {
1395     *buffer = L'\0';
1396     return 0;
1397   }
1398   assert(item);
1399
1400   if (nStart)
1401   {
1402     int nLen = ME_StrLen(item->member.run.strText) - nStart;
1403     if (nLen > nChars)
1404       nLen = nChars;
1405     CopyMemory(buffer, item->member.run.strText->szData + nStart, sizeof(WCHAR)*nLen);
1406     nChars -= nLen;
1407     nWritten += nLen;
1408     if (!nChars)
1409       return nWritten;
1410     buffer += nLen;
1411     nStart = 0;
1412     item = ME_FindItemFwd(item, diRun);
1413   }
1414
1415   while(nChars && item)
1416   {
1417     int nLen = ME_StrLen(item->member.run.strText);
1418     if (nLen > nChars)
1419       nLen = nChars;
1420
1421     if (item->member.run.nFlags & MERF_ENDPARA)
1422     {
1423       if (bCRLF) {
1424         *buffer++ = '\r';
1425         nWritten++;
1426       }
1427       *buffer = '\n';
1428       assert(nLen == 1);
1429     }
1430     else
1431       CopyMemory(buffer, item->member.run.strText->szData, sizeof(WCHAR)*nLen);
1432     nChars -= nLen;
1433     nWritten += nLen;
1434     buffer += nLen;
1435
1436     if (!nChars)
1437     {
1438       *buffer = L'\0';
1439       return nWritten;
1440     }
1441     item = ME_FindItemFwd(item, diRun);
1442   }
1443   *buffer = L'\0';
1444   return nWritten;
1445 }
1446
1447 void ME_RegisterEditorClass(HINSTANCE hInstance)
1448 {
1449   BOOL bResult;
1450   WNDCLASSW wcW;
1451   WNDCLASSA wcA;
1452
1453   wcW.style = CS_HREDRAW | CS_VREDRAW;
1454   wcW.lpfnWndProc = RichEditANSIWndProc;
1455   wcW.cbClsExtra = 0;
1456   wcW.cbWndExtra = 4;
1457   wcW.hInstance = NULL; /* hInstance would register DLL-local class */
1458   wcW.hIcon = NULL;
1459   wcW.hCursor = LoadCursorW(NULL, MAKEINTRESOURCEW(IDC_IBEAM));
1460   wcW.hbrBackground = (HBRUSH)GetStockObject(NULL_BRUSH);
1461   wcW.lpszMenuName = NULL;
1462   wcW.lpszClassName = wszClassName;
1463   bResult = RegisterClassW(&wcW);
1464   assert(bResult);
1465   wcW.lpszClassName = wszClassName50;
1466   bResult = RegisterClassW(&wcW);
1467   assert(bResult);
1468
1469   wcA.style = CS_HREDRAW | CS_VREDRAW;
1470   wcA.lpfnWndProc = RichEditANSIWndProc;
1471   wcA.cbClsExtra = 0;
1472   wcA.cbWndExtra = 4;
1473   wcA.hInstance = NULL; /* hInstance would register DLL-local class */
1474   wcA.hIcon = NULL;
1475   wcA.hCursor = LoadCursorW(NULL, MAKEINTRESOURCEW(IDC_IBEAM));
1476   wcA.hbrBackground = (HBRUSH)GetStockObject(NULL_BRUSH);
1477   wcA.lpszMenuName = NULL;
1478   wcA.lpszClassName = "RichEdit20A";
1479   bResult = RegisterClassA(&wcA);
1480   assert(bResult);
1481   wcA.lpszClassName = "RichEdit50A";
1482   bResult = RegisterClassA(&wcA);
1483   assert(bResult);
1484 }
1485 /******************************************************************
1486  *        CreateTextServices (RICHED20.4)
1487  *
1488  * FIXME should be ITextHost instead of void*
1489  */
1490 HRESULT WINAPI CreateTextServices(IUnknown *punkOuter, void *pITextHost,
1491     IUnknown **ppUnk)
1492 {
1493   FIXME("stub\n");
1494   /* FIXME should support aggregation */
1495   if (punkOuter)
1496     return CLASS_E_NOAGGREGATION;
1497
1498   return E_FAIL; /* E_NOTIMPL isn't allowed by MSDN */
1499 }
1500
1501 /******************************************************************
1502  *        REExtendedRegisterClass (RICHED20.8)
1503  *
1504  * FIXME undocumented
1505  */
1506 void WINAPI REExtendedRegisterClass(void)
1507 {
1508   FIXME("stub\n");
1509 }