dlls/riched20/editor.c

   1 /*
   2  * RichEdit - functions dealing with editor object
   3  *
   4  * Copyright 2004 by Krzysztof Foltman
   5  * Copyright 2005 by Cihan Altinay
   6  * Copyright 2005 by Phil Krylov
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 /*
  24   API implementation status:
  25
  26   Messages (ANSI versions not done yet)
  27   + EM_AUTOURLDETECT 2.0
  28   + EM_CANPASTE
  29   + EM_CANREDO 2.0
  30   + EM_CANUNDO
  31   + EM_CHARFROMPOS
  32   - EM_DISPLAYBAND
  33   + EM_EMPTYUNDOBUFFER
  34   + EM_EXGETSEL
  35   + EM_EXLIMITTEXT
  36   + EM_EXLINEFROMCHAR
  37   + EM_EXSETSEL
  38   + EM_FINDTEXT (only FR_DOWN flag implemented)
  39   + EM_FINDTEXTEX (only FR_DOWN flag implemented)
  40   - EM_FINDWORDBREAK
  41   - EM_FMTLINES
  42   - EM_FORMATRANGE
  43   + EM_GETAUTOURLDETECT 2.0
  44   - EM_GETBIDIOPTIONS 3.0
  45   - EM_GETCHARFORMAT (partly done)
  46   - EM_GETEDITSTYLE
  47   + EM_GETEVENTMASK
  48   + EM_GETFIRSTVISIBLELINE (can be optimized if needed)
  49   - EM_GETIMECOLOR 1.0asian
  50   - EM_GETIMECOMPMODE 2.0
  51   - EM_GETIMEOPTIONS 1.0asian
  52   - EM_GETIMESTATUS
  53   - EM_GETLANGOPTIONS 2.0
  54   + EM_GETLIMITTEXT
  55   + EM_GETLINE
  56   + EM_GETLINECOUNT   returns number of rows, not of paragraphs
  57   + EM_GETMODIFY
  58   - EM_GETOLEINTERFACE
  59   + EM_GETOPTIONS
  60   + EM_GETPARAFORMAT
  61   + EM_GETPASSWORDCHAR 2.0
  62   - EM_GETPUNCTUATION 1.0asian
  63   + EM_GETRECT
  64   - EM_GETREDONAME 2.0
  65   + EM_GETSEL
  66   + EM_GETSELTEXT (ANSI&Unicode)
  67   + EM_GETSCROLLPOS 3.0 (only Y value valid)
  68 ! - EM_GETTHUMB
  69   + EM_GETTEXTEX 2.0
  70   + EM_GETTEXTLENGTHEX (GTL_PRECISE unimplemented)
  71   - EM_GETTEXTMODE 2.0
  72 ? + EM_GETTEXTRANGE (ANSI&Unicode)
  73   - EM_GETTYPOGRAPHYOPTIONS 3.0
  74   - EM_GETUNDONAME
  75   + EM_GETWORDBREAKPROC
  76   - EM_GETWORDBREAKPROCEX
  77   - EM_GETWORDWRAPMODE 1.0asian
  78   + EM_GETZOOM 3.0
  79   + EM_HIDESELECTION
  80   + EM_LIMITTEXT (Also called EM_SETLIMITTEXT)
  81   + EM_LINEFROMCHAR
  82   + EM_LINEINDEX
  83   + EM_LINELENGTH
  84   + EM_LINESCROLL
  85   - EM_PASTESPECIAL
  86   + EM_POSFROMCHAR
  87   + EM_REDO 2.0
  88   + EM_REQUESTRESIZE
  89   + EM_REPLACESEL (proper style?) ANSI&Unicode
  90   + EM_SCROLL
  91   + EM_SCROLLCARET
  92   - EM_SELECTIONTYPE
  93   - EM_SETBIDIOPTIONS 3.0
  94   + EM_SETBKGNDCOLOR
  95   + EM_SETCHARFORMAT (partly done, no ANSI)
  96   - EM_SETEDITSTYLE
  97   + EM_SETEVENTMASK (few notifications supported)
  98   - EM_SETFONTSIZE
  99   - EM_SETIMECOLOR 1.0asian
 100   - EM_SETIMEOPTIONS 1.0asian
 101   - EM_SETLANGOPTIONS 2.0
 102   - EM_SETLIMITTEXT
 103   + EM_SETMODIFY (not sure if implementation is correct)
 104   - EM_SETOLECALLBACK
 105   + EM_SETOPTIONS (partially implemented)
 106   - EM_SETPALETTE 2.0
 107   + EM_SETPARAFORMAT
 108   + EM_SETPASSWORDCHAR 2.0
 109   - EM_SETPUNCTUATION 1.0asian
 110   + EM_SETREADONLY no beep on modification attempt
 111   + EM_SETRECT
 112   + EM_SETRECTNP (EM_SETRECT without repainting)
 113   + EM_SETSEL
 114   + EM_SETSCROLLPOS 3.0
 115   - EM_SETTABSTOPS 3.0
 116   - EM_SETTARGETDEVICE
 117   + EM_SETTEXTEX 3.0 (no rich text insertion handling, proper style?)
 118   - EM_SETTEXTMODE 2.0
 119   - EM_SETTYPOGRAPHYOPTIONS 3.0
 120   + EM_SETUNDOLIMIT 2.0
 121   + EM_SETWORDBREAKPROC (used only for word movement at the moment)
 122   - EM_SETWORDBREAKPROCEX
 123   - EM_SETWORDWRAPMODE 1.0asian
 124   + EM_SETZOOM 3.0
 125   + EM_SHOWSCROLLBAR 2.0
 126   - EM_STOPGROUPTYPING 2.0
 127   + EM_STREAMIN
 128   + EM_STREAMOUT
 129   + EM_UNDO
 130   + WM_CHAR
 131   + WM_CLEAR
 132   + WM_COPY
 133   + WM_CUT
 134   + WM_GETDLGCODE (the current implementation is incomplete)
 135   + WM_GETTEXT (ANSI&Unicode)
 136   + WM_GETTEXTLENGTH (ANSI version sucks)
 137   + WM_PASTE
 138   + WM_SETFONT
 139   + WM_SETTEXT (resets undo stack !) (proper style?) ANSI&Unicode
 140   - WM_STYLECHANGING
 141   - WM_STYLECHANGED (things like read-only flag)
 142   - WM_UNICHAR
 143
 144   Notifications
 145
 146   * EN_CHANGE (sent from the wrong place)
 147   - EN_CORRECTTEXT
 148   - EN_DROPFILES
 149   - EN_ERRSPACE
 150   - EN_HSCROLL
 151   - EN_IMECHANGE
 152   + EN_KILLFOCUS
 153   - EN_LINK
 154   - EN_MAXTEXT
 155   - EN_MSGFILTER
 156   - EN_OLEOPFAILED
 157   - EN_PROTECTED
 158   + EN_REQUESTRESIZE
 159   - EN_SAVECLIPBOARD
 160   + EN_SELCHANGE
 161   + EN_SETFOCUS
 162   - EN_STOPNOUNDO
 163   * EN_UPDATE (sent from the wrong place)
 164   - EN_VSCROLL
 165
 166   Styles
 167
 168   - ES_AUTOHSCROLL
 169   - ES_AUTOVSCROLL
 170   - ES_CENTER
 171   + ES_DISABLENOSCROLL (scrollbar is always visible)
 172   - ES_EX_NOCALLOLEINIT
 173   - ES_LEFT
 174   - ES_MULTILINE (currently single line controls aren't supported)
 175   - ES_NOIME
 176   - ES_READONLY (I'm not sure if beeping is the proper behaviour)
 177   - ES_RIGHT
 178   - ES_SAVESEL
 179   - ES_SELFIME
 180   - ES_SUNKEN
 181   - ES_VERTICAL
 182   - ES_WANTRETURN (don't know how to do WM_GETDLGCODE part)
 183   - WS_SETFONT
 184   - WS_HSCROLL
 185   + WS_VSCROLL
 186 */
 187
 188 /*
 189  * RICHED20 TODO (incomplete):
 190  *
 191  * - messages/styles/notifications listed above
 192  * - Undo coalescing
 193  * - add remaining CHARFORMAT/PARAFORMAT fields
 194  * - right/center align should strip spaces from the beginning
 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  * - full justification
 209  * - hyphenation
 210  * - tables
 211  * - ListBox & ComboBox not implemented
 212  *
 213  * Bugs that are probably fixed, but not so easy to verify:
 214  * - EN_UPDATE/EN_CHANGE are handled very incorrectly (should be OK now)
 215  * - undo for ME_JoinParagraphs doesn't store paragraph format ? (it does)
 216  * - check/fix artificial EOL logic (bCursorAtEnd, hardly logical)
 217  * - caret shouldn't be displayed when selection isn't empty
 218  * - check refcounting in style management functions (looks perfect now, but no bugs is suspicious)
 219  * - undo for setting default format (done, might be buggy)
 220  * - styles might be not released properly (looks like they work like charm, but who knows?
 221  *
 222  */
 223
 224 #include "editor.h"
 225 #include "commdlg.h"
 226 #include "winreg.h"
 227 #define NO_SHLWAPI_STREAM
 228 #include "shlwapi.h"
 229 #include "rtf.h"
 230 #include "imm.h"
 231
 232 #define STACK_SIZE_DEFAULT  100
 233 #define STACK_SIZE_MAX     1000
 234
 235 #define TEXT_LIMIT_DEFAULT 32767
 236
 237 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
 238
 239 static BOOL ME_RegisterEditorClass(HINSTANCE);
 240
 241 static const WCHAR RichEdit20W[] = {'R', 'i', 'c', 'h', 'E', 'd', 'i', 't', '2', '0', 'W', 0};
 242 static const WCHAR RichEdit50W[] = {'R', 'i', 'c', 'h', 'E', 'd', 'i', 't', '5', '0', 'W', 0};
 243 static const WCHAR REListBox20W[] = {'R','E','L','i','s','t','B','o','x','2','0','W', 0};
 244 static const WCHAR REComboBox20W[] = {'R','E','C','o','m','b','o','B','o','x','2','0','W', 0};
 245
 246 int me_debug = 0;
 247 HANDLE me_heap = NULL;
 248
 249 static BOOL ME_ListBoxRegistered = FALSE;
 250 static BOOL ME_ComboBoxRegistered = FALSE;
 251
 252 static inline int is_version_nt(void)
 253 {
 254     return !(GetVersion() & 0x80000000);
 255 }
 256
 257 static ME_TextBuffer *ME_MakeText(void) {
 258
 259   ME_TextBuffer *buf = ALLOC_OBJ(ME_TextBuffer);
 260
 261   ME_DisplayItem *p1 = ME_MakeDI(diTextStart);
 262   ME_DisplayItem *p2 = ME_MakeDI(diTextEnd);
 263
 264   p1->prev = NULL;
 265   p1->next = p2;
 266   p2->prev = p1;
 267   p2->next = NULL;
 268   p1->member.para.next_para = p2;
 269   p2->member.para.prev_para = p1;
 270   p2->member.para.nCharOfs = 0;
 271
 272   buf->pFirst = p1;
 273   buf->pLast = p2;
 274   buf->pCharStyle = NULL;
 275
 276   return buf;
 277 }
 278
 279
 280 static LRESULT ME_StreamInText(ME_TextEditor *editor, DWORD dwFormat, ME_InStream *stream, ME_Style *style)
 281 {
 282   WCHAR wszText[STREAMIN_BUFFER_SIZE+1];
 283   WCHAR *pText;
 284
 285   TRACE("%08x %p\n", dwFormat, stream);
 286
 287   do {
 288     long nWideChars = 0;
 289
 290     if (!stream->dwSize)
 291     {
 292       ME_StreamInFill(stream);
 293       if (stream->editstream->dwError)
 294         break;
 295       if (!stream->dwSize)
 296         break;
 297     }
 298
 299     if (!(dwFormat & SF_UNICODE))
 300     {
 301       /* FIXME? this is doomed to fail on true MBCS like UTF-8, luckily they're unlikely to be used as CP_ACP */
 302       nWideChars = MultiByteToWideChar(CP_ACP, 0, stream->buffer, stream->dwSize, wszText, STREAMIN_BUFFER_SIZE);
 303       pText = wszText;
 304     }
 305     else
 306     {
 307       nWideChars = stream->dwSize >> 1;
 308       pText = (WCHAR *)stream->buffer;
 309     }
 310
 311     ME_InsertTextFromCursor(editor, 0, pText, nWideChars, style);
 312     if (stream->dwSize == 0)
 313       break;
 314     stream->dwSize = 0;
 315   } while(1);
 316   ME_CommitUndo(editor);
 317   ME_UpdateRepaint(editor);
 318   return 0;
 319 }
 320
 321 static void ME_RTFCharAttrHook(RTF_Info *info)
 322 {
 323   CHARFORMAT2W fmt;
 324   fmt.cbSize = sizeof(fmt);
 325   fmt.dwMask = 0;
 326   fmt.dwEffects = 0;
 327
 328   switch(info->rtfMinor)
 329   {
 330     case rtfPlain:
 331       /* FIXME add more flags once they're implemented */
 332       fmt.dwMask = CFM_BOLD | CFM_ITALIC | CFM_UNDERLINE | CFM_STRIKEOUT | CFM_COLOR | CFM_BACKCOLOR | CFM_SIZE | CFM_WEIGHT;
 333       fmt.dwEffects = CFE_AUTOCOLOR | CFE_AUTOBACKCOLOR;
 334       fmt.yHeight = 12*20; /* 12pt */
 335       fmt.wWeight = 400;
 336       break;
 337     case rtfBold:
 338       fmt.dwMask = CFM_BOLD;
 339       fmt.dwEffects = info->rtfParam ? fmt.dwMask : 0;
 340       break;
 341     case rtfItalic:
 342       fmt.dwMask = CFM_ITALIC;
 343       fmt.dwEffects = info->rtfParam ? fmt.dwMask : 0;
 344       break;
 345     case rtfUnderline:
 346       fmt.dwMask = CFM_UNDERLINE;
 347       fmt.dwEffects = info->rtfParam ? fmt.dwMask : 0;
 348       fmt.bUnderlineType = CFU_CF1UNDERLINE;
 349       break;
 350     case rtfNoUnderline:
 351       fmt.dwMask = CFM_UNDERLINE;
 352       fmt.dwEffects = 0;
 353       break;
 354     case rtfStrikeThru:
 355       fmt.dwMask = CFM_STRIKEOUT;
 356       fmt.dwEffects = info->rtfParam ? fmt.dwMask : 0;
 357       break;
 358     case rtfSubScript:
 359     case rtfSuperScript:
 360     case rtfSubScrShrink:
 361     case rtfSuperScrShrink:
 362     case rtfNoSuperSub:
 363       fmt.dwMask = CFM_SUBSCRIPT|CFM_SUPERSCRIPT;
 364       if (info->rtfMinor == rtfSubScrShrink) fmt.dwEffects = CFE_SUBSCRIPT;
 365       if (info->rtfMinor == rtfSuperScrShrink) fmt.dwEffects = CFE_SUPERSCRIPT;
 366       if (info->rtfMinor == rtfNoSuperSub) fmt.dwEffects = 0;
 367       break;
 368     case rtfInvisible:
 369       fmt.dwMask = CFM_HIDDEN;
 370       fmt.dwEffects = info->rtfParam ? fmt.dwMask : 0;
 371       break;
 372     case rtfBackColor:
 373       fmt.dwMask = CFM_BACKCOLOR;
 374       fmt.dwEffects = 0;
 375       if (info->rtfParam == 0)
 376         fmt.dwEffects = CFE_AUTOBACKCOLOR;
 377       else if (info->rtfParam != rtfNoParam)
 378       {
 379         RTFColor *c = RTFGetColor(info, info->rtfParam);
 380         fmt.crTextColor = (c->rtfCBlue<<16)|(c->rtfCGreen<<8)|(c->rtfCRed);
 381       }
 382       break;
 383     case rtfForeColor:
 384       fmt.dwMask = CFM_COLOR;
 385       fmt.dwEffects = 0;
 386       if (info->rtfParam == 0)
 387         fmt.dwEffects = CFE_AUTOCOLOR;
 388       else if (info->rtfParam != rtfNoParam)
 389       {
 390         RTFColor *c = RTFGetColor(info, info->rtfParam);
 391         if (c)
 392           fmt.crTextColor = (c->rtfCBlue<<16)|(c->rtfCGreen<<8)|(c->rtfCRed);
 393         else
 394           fmt.crTextColor = 0;
 395       }
 396       break;
 397     case rtfFontNum:
 398       if (info->rtfParam != rtfNoParam)
 399       {
 400         RTFFont *f = RTFGetFont(info, info->rtfParam);
 401         if (f)
 402         {
 403           MultiByteToWideChar(CP_ACP, 0, f->rtfFName, -1, fmt.szFaceName, sizeof(fmt.szFaceName)/sizeof(WCHAR));
 404           fmt.szFaceName[sizeof(fmt.szFaceName)/sizeof(WCHAR)-1] = '\0';
 405           fmt.bCharSet = f->rtfFCharSet;
 406           fmt.dwMask = CFM_FACE | CFM_CHARSET;
 407         }
 408       }
 409       break;
 410     case rtfFontSize:
 411       fmt.dwMask = CFM_SIZE;
 412       if (info->rtfParam != rtfNoParam)
 413         fmt.yHeight = info->rtfParam*10;
 414       break;
 415   }
 416   if (fmt.dwMask) {
 417     ME_Style *style2;
 418     RTFFlushOutputBuffer(info);
 419     /* FIXME too slow ? how come ? */
 420     style2 = ME_ApplyStyle(info->style, &fmt);
 421     ME_ReleaseStyle(info->style);
 422     info->style = style2;
 423     info->styleChanged = TRUE;
 424   }
 425 }
 426
 427 /* FIXME this function doesn't get any information about context of the RTF tag, which is very bad,
 428    the same tags mean different things in different contexts */
 429 static void ME_RTFParAttrHook(RTF_Info *info)
 430 {
 431   PARAFORMAT2 fmt;
 432   fmt.cbSize = sizeof(fmt);
 433   fmt.dwMask = 0;
 434
 435   switch(info->rtfMinor)
 436   {
 437   case rtfParDef: /* restores default paragraph attributes */
 438     fmt.dwMask = PFM_ALIGNMENT | PFM_TABSTOPS | PFM_OFFSET | PFM_STARTINDENT;
 439     fmt.wAlignment = PFA_LEFT;
 440     fmt.cTabCount = 0;
 441     fmt.dxOffset = fmt.dxStartIndent = 0;
 442     RTFFlushOutputBuffer(info);
 443     ME_GetParagraph(info->editor->pCursors[0].pRun)->member.para.bTable = FALSE;
 444     break;
 445   case rtfInTable:
 446   {
 447     ME_DisplayItem *para;
 448
 449     RTFFlushOutputBuffer(info);
 450     para = ME_GetParagraph(info->editor->pCursors[0].pRun);
 451     assert(para->member.para.pCells);
 452     para->member.para.bTable = TRUE;
 453     return;
 454   }
 455   case rtfFirstIndent:
 456     ME_GetSelectionParaFormat(info->editor, &fmt);
 457     fmt.dwMask = PFM_STARTINDENT | PFM_OFFSET;
 458     fmt.dxStartIndent += info->rtfParam + fmt.dxOffset;
 459     fmt.dxOffset = -info->rtfParam;
 460     break;
 461   case rtfLeftIndent:
 462     ME_GetSelectionParaFormat(info->editor, &fmt);
 463     fmt.dwMask = PFM_STARTINDENT;
 464     fmt.dxStartIndent = -fmt.dxOffset + info->rtfParam;
 465     break;
 466   case rtfRightIndent:
 467     fmt.dwMask = PFM_RIGHTINDENT;
 468     fmt.dxRightIndent = info->rtfParam;
 469     break;
 470   case rtfQuadLeft:
 471   case rtfQuadJust:
 472     fmt.dwMask = PFM_ALIGNMENT;
 473     fmt.wAlignment = PFA_LEFT;
 474     break;
 475   case rtfQuadRight:
 476     fmt.dwMask = PFM_ALIGNMENT;
 477     fmt.wAlignment = PFA_RIGHT;
 478     break;
 479   case rtfQuadCenter:
 480     fmt.dwMask = PFM_ALIGNMENT;
 481     fmt.wAlignment = PFA_CENTER;
 482     break;
 483   case rtfTabPos:
 484     ME_GetSelectionParaFormat(info->editor, &fmt);
 485     if (!(fmt.dwMask & PFM_TABSTOPS))
 486     {
 487       fmt.dwMask |= PFM_TABSTOPS;
 488       fmt.cTabCount = 0;
 489     }
 490     if (fmt.cTabCount < MAX_TAB_STOPS)
 491       fmt.rgxTabs[fmt.cTabCount++] = info->rtfParam;
 492     break;
 493   }
 494   if (fmt.dwMask) {
 495     RTFFlushOutputBuffer(info);
 496     /* FIXME too slow ? how come ?*/
 497     ME_SetSelectionParaFormat(info->editor, &fmt);
 498   }
 499 }
 500
 501 static void ME_RTFTblAttrHook(RTF_Info *info)
 502 {
 503   ME_DisplayItem *para;
 504
 505   switch (info->rtfMinor)
 506   {
 507     case rtfRowDef:
 508       RTFFlushOutputBuffer(info);
 509       para = ME_GetParagraph(info->editor->pCursors[0].pRun);
 510
 511       /* Release possibly inherited cell definitions */
 512       ME_DestroyTableCellList(para);
 513
 514       para->member.para.pCells = ALLOC_OBJ(ME_TableCell);
 515       para->member.para.pCells->nRightBoundary = 0;
 516       para->member.para.pCells->next = NULL;
 517       para->member.para.pLastCell = para->member.para.pCells;
 518       break;
 519     case rtfCellPos:
 520       RTFFlushOutputBuffer(info);
 521       para = ME_GetParagraph(info->editor->pCursors[0].pRun);
 522
 523       if (para->member.para.pLastCell->nRightBoundary)
 524       {
 525         ME_TableCell *pCell = ALLOC_OBJ(ME_TableCell);
 526
 527         pCell->next = NULL;
 528         para->member.para.pLastCell->next = pCell;
 529         para->member.para.pLastCell = pCell;
 530       }
 531       para->member.para.pLastCell->nRightBoundary = info->rtfParam;
 532       break;
 533   }
 534 }
 535
 536 static void ME_RTFReadHook(RTF_Info *info) {
 537   switch(info->rtfClass)
 538   {
 539     case rtfGroup:
 540       switch(info->rtfMajor)
 541       {
 542         case rtfBeginGroup:
 543           if (info->stackTop < maxStack) {
 544             memcpy(&info->stack[info->stackTop].fmt, &info->style->fmt, sizeof(CHARFORMAT2W));
 545             info->stack[info->stackTop].codePage = info->codePage;
 546             info->stack[info->stackTop].unicodeLength = info->unicodeLength;
 547           }
 548           info->stackTop++;
 549           info->styleChanged = FALSE;
 550           break;
 551         case rtfEndGroup:
 552         {
 553           ME_Style *s;
 554           RTFFlushOutputBuffer(info);
 555           if (info->stackTop<=1) {
 556             info->rtfClass = rtfEOF;
 557             return;
 558           }
 559           info->stackTop--;
 560           assert(info->stackTop >= 0);
 561           if (info->styleChanged)
 562           {
 563             /* FIXME too slow ? how come ? */
 564             s = ME_ApplyStyle(info->style, &info->stack[info->stackTop].fmt);
 565             ME_ReleaseStyle(info->style);
 566             info->style = s;
 567             info->codePage = info->stack[info->stackTop].codePage;
 568             info->unicodeLength = info->stack[info->stackTop].unicodeLength;
 569           }
 570           break;
 571         }
 572       }
 573       break;
 574     case rtfControl:
 575       switch(info->rtfMajor)
 576       {
 577         case rtfCharAttr:
 578           ME_RTFCharAttrHook(info);
 579           break;
 580         case rtfParAttr:
 581           ME_RTFParAttrHook(info);
 582           break;
 583         case rtfTblAttr:
 584           ME_RTFTblAttrHook(info);
 585           break;
 586         case rtfSpecialChar:
 587           if (info->rtfMinor == rtfCell)
 588           {
 589             RTFFlushOutputBuffer(info);
 590             ME_InsertTableCellFromCursor(info->editor, 0);
 591           }
 592       }
 593       break;
 594   }
 595 }
 596
 597 void
 598 ME_StreamInFill(ME_InStream *stream)
 599 {
 600   stream->editstream->dwError = stream->editstream->pfnCallback(stream->editstream->dwCookie,
 601                                                                 (BYTE *)stream->buffer,
 602                                                                 sizeof(stream->buffer),
 603                                                                 (LONG *)&stream->dwSize);
 604   stream->dwUsed = 0;
 605 }
 606
 607 static LRESULT ME_StreamIn(ME_TextEditor *editor, DWORD format, EDITSTREAM *stream)
 608 {
 609   RTF_Info parser;
 610   ME_Style *style;
 611   int from, to, to2, nUndoMode;
 612   int nEventMask = editor->nEventMask;
 613   ME_InStream inStream;
 614
 615   TRACE("stream==%p hWnd==%p format==0x%X\n", stream, editor->hWnd, (UINT)format);
 616   editor->nEventMask = 0;
 617
 618   ME_GetSelection(editor, &from, &to);
 619   if ((format & SFF_SELECTION) && (editor->mode & TM_RICHTEXT)) {
 620     style = ME_GetSelectionInsertStyle(editor);
 621
 622     ME_InternalDeleteText(editor, from, to-from);
 623   }
 624   else {
 625     style = editor->pBuffer->pDefaultStyle;
 626     ME_AddRefStyle(style);
 627     SendMessageA(editor->hWnd, EM_SETSEL, 0, 0);
 628     ME_InternalDeleteText(editor, 0, ME_GetTextLength(editor));
 629     from = to = 0;
 630     ME_ClearTempStyle(editor);
 631     /* FIXME restore default paragraph formatting ! */
 632   }
 633
 634
 635   /* Back up undo mode to a local variable */
 636   nUndoMode = editor->nUndoMode;
 637
 638   /* Only create an undo if SFF_SELECTION is set */
 639   if (!(format & SFF_SELECTION))
 640     editor->nUndoMode = umIgnore;
 641
 642   inStream.editstream = stream;
 643   inStream.editstream->dwError = 0;
 644   inStream.dwSize = 0;
 645   inStream.dwUsed = 0;
 646
 647   if (format & SF_RTF)
 648   {
 649     /* Check if it's really RTF, and if it is not, use plain text */
 650     ME_StreamInFill(&inStream);
 651     if (!inStream.editstream->dwError)
 652     {
 653       if (strncmp(inStream.buffer, "{\\rtf", 5) && strncmp(inStream.buffer, "{\\urtf", 6))
 654       {
 655         format &= ~SF_RTF;
 656         format |= SF_TEXT;
 657       }
 658     }
 659   }
 660
 661   if (!inStream.editstream->dwError)
 662   {
 663     if (format & SF_RTF) {
 664       /* setup the RTF parser */
 665       memset(&parser, 0, sizeof parser);
 666       RTFSetEditStream(&parser, &inStream);
 667       parser.rtfFormat = format&(SF_TEXT|SF_RTF);
 668       parser.hwndEdit = editor->hWnd;
 669       parser.editor = editor;
 670       parser.style = style;
 671       WriterInit(&parser);
 672       RTFInit(&parser);
 673       RTFSetReadHook(&parser, ME_RTFReadHook);
 674       BeginFile(&parser);
 675
 676       /* do the parsing */
 677       RTFRead(&parser);
 678       RTFFlushOutputBuffer(&parser);
 679       RTFDestroy(&parser);
 680
 681       style = parser.style;
 682     }
 683     else if (format & SF_TEXT)
 684       ME_StreamInText(editor, format, &inStream, style);
 685     else
 686       ERR("EM_STREAMIN without SF_TEXT or SF_RTF\n");
 687     ME_GetSelection(editor, &to, &to2);
 688     /* put the cursor at the top */
 689     if (!(format & SFF_SELECTION))
 690       SendMessageA(editor->hWnd, EM_SETSEL, 0, 0);
 691   }
 692
 693   /* Restore saved undo mode */
 694   editor->nUndoMode = nUndoMode;
 695
 696   /* even if we didn't add an undo, we need to commit anything on the stack */
 697   ME_CommitUndo(editor);
 698
 699   /* If SFF_SELECTION isn't set, delete any undos from before we started too */
 700   if (!(format & SFF_SELECTION))
 701     ME_EmptyUndoStack(editor);
 702
 703   ME_ReleaseStyle(style);
 704   editor->nEventMask = nEventMask;
 705   if (editor->bRedraw)
 706   {
 707     ME_UpdateRepaint(editor);
 708   }
 709   if (!(format & SFF_SELECTION)) {
 710     ME_ClearTempStyle(editor);
 711   }
 712   ME_MoveCaret(editor);
 713   ME_SendSelChange(editor);
 714   ME_SendRequestResize(editor, FALSE);
 715
 716   return 0;
 717 }
 718
 719
 720 typedef struct tagME_RTFStringStreamStruct
 721 {
 722   char *string;
 723   int pos;
 724   int length;
 725 } ME_RTFStringStreamStruct;
 726
 727 static DWORD CALLBACK ME_ReadFromRTFString(DWORD_PTR dwCookie, LPBYTE lpBuff, LONG cb, LONG *pcb)
 728 {
 729   ME_RTFStringStreamStruct *pStruct = (ME_RTFStringStreamStruct *)dwCookie;
 730   int count;
 731
 732   count = min(cb, pStruct->length - pStruct->pos);
 733   memmove(lpBuff, pStruct->string + pStruct->pos, count);
 734   pStruct->pos += count;
 735   *pcb = count;
 736   return 0;
 737 }
 738
 739 static void
 740 ME_StreamInRTFString(ME_TextEditor *editor, BOOL selection, char *string)
 741 {
 742   EDITSTREAM es;
 743   ME_RTFStringStreamStruct data;
 744
 745   data.string = string;
 746   data.length = strlen(string);
 747   data.pos = 0;
 748   es.dwCookie = (DWORD)&data;
 749   es.pfnCallback = ME_ReadFromRTFString;
 750   ME_StreamIn(editor, SF_RTF | (selection ? SFF_SELECTION : 0), &es);
 751 }
 752
 753
 754 ME_DisplayItem *
 755 ME_FindItemAtOffset(ME_TextEditor *editor, ME_DIType nItemType, int nOffset, int *nItemOffset)
 756 {
 757   ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
 758
 759   while (item && item->member.para.next_para->member.para.nCharOfs <= nOffset)
 760     item = ME_FindItemFwd(item, diParagraph);
 761
 762   if (!item)
 763     return item;
 764
 765   nOffset -= item->member.para.nCharOfs;
 766   if (nItemType == diParagraph) {
 767     if (nItemOffset)
 768       *nItemOffset = nOffset;
 769     return item;
 770   }
 771
 772   do {
 773     item = ME_FindItemFwd(item, diRun);
 774   } while (item && (item->member.run.nCharOfs + ME_StrLen(item->member.run.strText) <= nOffset));
 775   if (item) {
 776     nOffset -= item->member.run.nCharOfs;
 777     if (nItemOffset)
 778       *nItemOffset = nOffset;
 779   }
 780   return item;
 781 }
 782
 783
 784 static int
 785 ME_FindText(ME_TextEditor *editor, DWORD flags, const CHARRANGE *chrg, const WCHAR *text, CHARRANGE *chrgText)
 786 {
 787   const int nLen = lstrlenW(text);
 788   const int nTextLen = ME_GetTextLength(editor);
 789   int nStart, nEnd;
 790   int nMin, nMax;
 791   ME_DisplayItem *item;
 792   ME_DisplayItem *para;
 793   WCHAR wLastChar = ' ';
 794
 795   TRACE("flags==0x%08x, chrg->cpMin==%d, chrg->cpMax==%d text==%s\n",
 796         flags, chrg->cpMin, chrg->cpMax, debugstr_w(text));
 797
 798   if (flags & ~(FR_DOWN | FR_MATCHCASE | FR_WHOLEWORD))
 799     FIXME("Flags 0x%08x not implemented\n",
 800         flags & ~(FR_DOWN | FR_MATCHCASE | FR_WHOLEWORD));
 801
 802   nMin = chrg->cpMin;
 803   if (chrg->cpMax == -1)
 804     nMax = nTextLen;
 805   else
 806     nMax = chrg->cpMax > nTextLen ? nTextLen : chrg->cpMax;
 807
 808   /* when searching up, if cpMin < cpMax, then instead of searching
 809    * on [cpMin,cpMax], we search on [0,cpMin], otherwise, search on
 810    * [cpMax, cpMin]. The exception is when cpMax is -1, in which
 811    * case, it is always bigger than cpMin.
 812    */
 813   if (!(flags & FR_DOWN))
 814   {
 815     int nSwap = nMax;
 816
 817     nMax = nMin > nTextLen ? nTextLen : nMin;
 818     if (nMin < nSwap || chrg->cpMax == -1)
 819       nMin = 0;
 820     else
 821       nMin = nSwap;
 822   }
 823
 824   if (!nLen || nMin < 0 || nMax < 0 || nMax < nMin)
 825   {
 826     if (chrgText)
 827       chrgText->cpMin = chrgText->cpMax = -1;
 828     return -1;
 829   }
 830
 831   if (flags & FR_DOWN) /* Forward search */
 832   {
 833     /* If possible, find the character before where the search starts */
 834     if ((flags & FR_WHOLEWORD) && nMin)
 835     {
 836       nStart = nMin - 1;
 837       item = ME_FindItemAtOffset(editor, diRun, nStart, &nStart);
 838       if (!item)
 839       {
 840         if (chrgText)
 841           chrgText->cpMin = chrgText->cpMax = -1;
 842         return -1;
 843       }
 844       wLastChar = item->member.run.strText->szData[nStart];
 845     }
 846
 847     nStart = nMin;
 848     item = ME_FindItemAtOffset(editor, diRun, nStart, &nStart);
 849     if (!item)
 850     {
 851       if (chrgText)
 852         chrgText->cpMin = chrgText->cpMax = -1;
 853       return -1;
 854     }
 855
 856     para = ME_GetParagraph(item);
 857     while (item
 858            && para->member.para.nCharOfs + item->member.run.nCharOfs + nStart + nLen <= nMax)
 859     {
 860       ME_DisplayItem *pCurItem = item;
 861       int nCurStart = nStart;
 862       int nMatched = 0;
 863
 864       while (pCurItem && ME_CharCompare(pCurItem->member.run.strText->szData[nCurStart + nMatched], text[nMatched], (flags & FR_MATCHCASE)))
 865       {
 866         if ((flags & FR_WHOLEWORD) && isalnumW(wLastChar))
 867           break;
 868
 869         nMatched++;
 870         if (nMatched == nLen)
 871         {
 872           ME_DisplayItem *pNextItem = pCurItem;
 873           int nNextStart = nCurStart;
 874           WCHAR wNextChar;
 875
 876           /* Check to see if next character is a whitespace */
 877           if (flags & FR_WHOLEWORD)
 878           {
 879             if (nCurStart + nMatched == ME_StrLen(pCurItem->member.run.strText))
 880             {
 881               pNextItem = ME_FindItemFwd(pCurItem, diRun);
 882               nNextStart = -nMatched;
 883             }
 884
 885             if (pNextItem)
 886               wNextChar = pNextItem->member.run.strText->szData[nNextStart + nMatched];
 887             else
 888               wNextChar = ' ';
 889
 890             if (isalnumW(wNextChar))
 891               break;
 892           }
 893
 894           nStart += para->member.para.nCharOfs + pCurItem->member.run.nCharOfs;
 895           if (chrgText)
 896           {
 897             chrgText->cpMin = nStart;
 898             chrgText->cpMax = nStart + nLen;
 899           }
 900           TRACE("found at %d-%d\n", nStart, nStart + nLen);
 901           return nStart;
 902         }
 903         if (nCurStart + nMatched == ME_StrLen(pCurItem->member.run.strText))
 904         {
 905           pCurItem = ME_FindItemFwd(pCurItem, diRun);
 906           para = ME_GetParagraph(pCurItem);
 907           nCurStart = -nMatched;
 908         }
 909       }
 910       if (pCurItem)
 911         wLastChar = pCurItem->member.run.strText->szData[nCurStart + nMatched];
 912       else
 913         wLastChar = ' ';
 914
 915       nStart++;
 916       if (nStart == ME_StrLen(item->member.run.strText))
 917       {
 918         item = ME_FindItemFwd(item, diRun);
 919         para = ME_GetParagraph(item);
 920         nStart = 0;
 921       }
 922     }
 923   }
 924   else /* Backward search */
 925   {
 926     /* If possible, find the character after where the search ends */
 927     if ((flags & FR_WHOLEWORD) && nMax < nTextLen - 1)
 928     {
 929       nEnd = nMax + 1;
 930       item = ME_FindItemAtOffset(editor, diRun, nEnd, &nEnd);
 931       if (!item)
 932       {
 933         if (chrgText)
 934           chrgText->cpMin = chrgText->cpMax = -1;
 935         return -1;
 936       }
 937       wLastChar = item->member.run.strText->szData[nEnd];
 938     }
 939
 940     nEnd = nMax;
 941     item = ME_FindItemAtOffset(editor, diRun, nEnd, &nEnd);
 942     if (!item)
 943     {
 944       if (chrgText)
 945         chrgText->cpMin = chrgText->cpMax = -1;
 946       return -1;
 947     }
 948
 949     para = ME_GetParagraph(item);
 950
 951     while (item
 952            && para->member.para.nCharOfs + item->member.run.nCharOfs + nEnd - nLen >= nMin)
 953     {
 954       ME_DisplayItem *pCurItem = item;
 955       int nCurEnd = nEnd;
 956       int nMatched = 0;
 957
 958       if (nCurEnd - nMatched == 0)
 959       {
 960         pCurItem = ME_FindItemBack(pCurItem, diRun);
 961         para = ME_GetParagraph(pCurItem);
 962         nCurEnd = ME_StrLen(pCurItem->member.run.strText) + nMatched;
 963       }
 964
 965       while (pCurItem && ME_CharCompare(pCurItem->member.run.strText->szData[nCurEnd - nMatched - 1], text[nLen - nMatched - 1], (flags & FR_MATCHCASE)))
 966       {
 967         if ((flags & FR_WHOLEWORD) && isalnumW(wLastChar))
 968           break;
 969
 970         nMatched++;
 971         if (nMatched == nLen)
 972         {
 973           ME_DisplayItem *pPrevItem = pCurItem;
 974           int nPrevEnd = nCurEnd;
 975           WCHAR wPrevChar;
 976
 977           /* Check to see if previous character is a whitespace */
 978           if (flags & FR_WHOLEWORD)
 979           {
 980             if (nPrevEnd - nMatched == 0)
 981             {
 982               pPrevItem = ME_FindItemBack(pCurItem, diRun);
 983               if (pPrevItem)
 984                 nPrevEnd = ME_StrLen(pPrevItem->member.run.strText) + nMatched;
 985             }
 986
 987             if (pPrevItem)
 988               wPrevChar = pPrevItem->member.run.strText->szData[nPrevEnd - nMatched - 1];
 989             else
 990               wPrevChar = ' ';
 991
 992             if (isalnumW(wPrevChar))
 993               break;
 994           }
 995
 996           nStart = para->member.para.nCharOfs + pCurItem->member.run.nCharOfs + nCurEnd - nMatched;
 997           if (chrgText)
 998           {
 999             chrgText->cpMin = nStart;
1000             chrgText->cpMax = nStart + nLen;
1001           }
1002           TRACE("found at %d-%d\n", nStart, nStart + nLen);
1003           return nStart;
1004         }
1005         if (nCurEnd - nMatched == 0)
1006         {
1007           pCurItem = ME_FindItemBack(pCurItem, diRun);
1008           /* Don't care about pCurItem becoming NULL here; it's already taken
1009            * care of in the exterior loop condition */
1010           para = ME_GetParagraph(pCurItem);
1011           nCurEnd = ME_StrLen(pCurItem->member.run.strText) + nMatched;
1012         }
1013       }
1014       if (pCurItem)
1015         wLastChar = pCurItem->member.run.strText->szData[nCurEnd - nMatched - 1];
1016       else
1017         wLastChar = ' ';
1018
1019       nEnd--;
1020       if (nEnd < 0)
1021       {
1022         item = ME_FindItemBack(item, diRun);
1023         para = ME_GetParagraph(item);
1024         nEnd = ME_StrLen(item->member.run.strText);
1025       }
1026     }
1027   }
1028   TRACE("not found\n");
1029   if (chrgText)
1030     chrgText->cpMin = chrgText->cpMax = -1;
1031   return -1;
1032 }
1033
1034
1035 static BOOL
1036 ME_KeyDown(ME_TextEditor *editor, WORD nKey)
1037 {
1038   BOOL ctrl_is_down = GetKeyState(VK_CONTROL) & 0x8000;
1039   BOOL shift_is_down = GetKeyState(VK_SHIFT) & 0x8000;
1040
1041   switch (nKey)
1042   {
1043     case VK_LEFT:
1044     case VK_RIGHT:
1045     case VK_UP:
1046     case VK_DOWN:
1047     case VK_HOME:
1048     case VK_END:
1049     case VK_PRIOR:
1050     case VK_NEXT:
1051       ME_ArrowKey(editor, nKey, shift_is_down, ctrl_is_down);
1052       return TRUE;
1053     case VK_BACK:
1054     case VK_DELETE:
1055       /* FIXME backspace and delete aren't the same, they act different wrt paragraph style of the merged paragraph */
1056       if (GetWindowLongW(editor->hWnd, GWL_STYLE) & ES_READONLY)
1057         return FALSE;
1058       if (ME_IsSelection(editor))
1059         ME_DeleteSelection(editor);
1060       else if (nKey == VK_DELETE || ME_ArrowKey(editor, VK_LEFT, FALSE, FALSE))
1061         ME_DeleteTextAtCursor(editor, 1, 1);
1062       else
1063         return TRUE;
1064       ME_CommitUndo(editor);
1065       ME_UpdateRepaint(editor);
1066       ME_SendRequestResize(editor, FALSE);
1067       return TRUE;
1068
1069     default:
1070       if (ctrl_is_down)
1071       {
1072         if (nKey == 'W')
1073         {
1074           CHARFORMAT2W chf;
1075           char buf[2048];
1076           chf.cbSize = sizeof(chf);
1077
1078           ME_GetSelectionCharFormat(editor, &chf);
1079           ME_DumpStyleToBuf(&chf, buf);
1080           MessageBoxA(NULL, buf, "Style dump", MB_OK);
1081         }
1082         if (nKey == 'Q')
1083         {
1084           ME_CheckCharOffsets(editor);
1085         }
1086       }
1087   }
1088   return FALSE;
1089 }
1090
1091 static BOOL ME_ShowContextMenu(ME_TextEditor *editor, int x, int y)
1092 {
1093   CHARRANGE selrange;
1094   HMENU menu;
1095   int seltype = 0;
1096   if(!editor->lpOleCallback)
1097     return FALSE;
1098   ME_GetSelection(editor, (int *)&selrange.cpMin, (int *)&selrange.cpMax);
1099   if(selrange.cpMin == selrange.cpMax)
1100     seltype |= SEL_EMPTY;
1101   else
1102   {
1103     /* FIXME: Handle objects */
1104     seltype |= SEL_TEXT;
1105     if(selrange.cpMax-selrange.cpMin > 1)
1106       seltype |= SEL_MULTICHAR;
1107   }
1108   if(SUCCEEDED(IRichEditOleCallback_GetContextMenu(editor->lpOleCallback, seltype, NULL, &selrange, &menu)))
1109   {
1110     TrackPopupMenu(menu, TPM_LEFTALIGN | TPM_RIGHTBUTTON, x, y, 0, GetParent(editor->hWnd), NULL);
1111     DestroyMenu(menu);
1112   }
1113   return TRUE;
1114 }
1115
1116 ME_TextEditor *ME_MakeEditor(HWND hWnd) {
1117   ME_TextEditor *ed = ALLOC_OBJ(ME_TextEditor);
1118   HDC hDC;
1119   int i;
1120   ed->hWnd = hWnd;
1121   ed->bEmulateVersion10 = FALSE;
1122   ed->pBuffer = ME_MakeText();
1123   hDC = GetDC(hWnd);
1124   ME_MakeFirstParagraph(hDC, ed->pBuffer);
1125   ReleaseDC(hWnd, hDC);
1126   ed->bCaretShown = FALSE;
1127   ed->nCursors = 2;
1128   ed->pCursors = ALLOC_N_OBJ(ME_Cursor, ed->nCursors);
1129   ed->pCursors[0].pRun = ME_FindItemFwd(ed->pBuffer->pFirst, diRun);
1130   ed->pCursors[0].nOffset = 0;
1131   ed->pCursors[1].pRun = ME_FindItemFwd(ed->pBuffer->pFirst, diRun);
1132   ed->pCursors[1].nOffset = 0;
1133   ed->nLastTotalLength = ed->nTotalLength = 0;
1134   ed->nHeight = 0;
1135   ed->nUDArrowX = -1;
1136   ed->nSequence = 0;
1137   ed->rgbBackColor = -1;
1138   ed->hbrBackground = GetSysColorBrush(COLOR_WINDOW);
1139   ed->bCaretAtEnd = FALSE;
1140   ed->nEventMask = 0;
1141   ed->nModifyStep = 0;
1142   ed->nTextLimit = TEXT_LIMIT_DEFAULT;
1143   ed->pUndoStack = ed->pRedoStack = ed->pUndoStackBottom = NULL;
1144   ed->nUndoStackSize = 0;
1145   ed->nUndoLimit = STACK_SIZE_DEFAULT;
1146   ed->nUndoMode = umAddToUndo;
1147   ed->nParagraphs = 1;
1148   ed->nLastSelStart = ed->nLastSelEnd = 0;
1149   ed->pLastSelStartPara = ed->pLastSelEndPara = ME_FindItemFwd(ed->pBuffer->pFirst, diParagraph);
1150   ed->nZoomNumerator = ed->nZoomDenominator = 0;
1151   ed->bRedraw = TRUE;
1152   ed->bHideSelection = FALSE;
1153   ed->nInvalidOfs = -1;
1154   ed->pfnWordBreak = NULL;
1155   ed->lpOleCallback = NULL;
1156   ed->mode = TM_RICHTEXT | TM_MULTILEVELUNDO | TM_MULTICODEPAGE;
1157   ed->AutoURLDetect_bEnable = FALSE;
1158   ed->bHaveFocus = FALSE;
1159   GetClientRect(hWnd, &ed->rcFormat);
1160   for (i=0; i<HFONT_CACHE_SIZE; i++)
1161   {
1162     ed->pFontCache[i].nRefs = 0;
1163     ed->pFontCache[i].nAge = 0;
1164     ed->pFontCache[i].hFont = NULL;
1165   }
1166
1167   ME_CheckCharOffsets(ed);
1168
1169   if (GetWindowLongW(hWnd, GWL_STYLE) & ES_PASSWORD)
1170     ed->cPasswordMask = '*';
1171   else
1172     ed->cPasswordMask = 0;
1173
1174   return ed;
1175 }
1176
1177 typedef struct tagME_GlobalDestStruct
1178 {
1179   HGLOBAL hData;
1180   int nLength;
1181 } ME_GlobalDestStruct;
1182
1183 static DWORD CALLBACK ME_ReadFromHGLOBALUnicode(DWORD_PTR dwCookie, LPBYTE lpBuff, LONG cb, LONG *pcb)
1184 {
1185   ME_GlobalDestStruct *pData = (ME_GlobalDestStruct *)dwCookie;
1186   int i;
1187   WORD *pSrc, *pDest;
1188
1189   cb = cb >> 1;
1190   pDest = (WORD *)lpBuff;
1191   pSrc = (WORD *)GlobalLock(pData->hData);
1192   for (i = 0; i<cb && pSrc[pData->nLength+i]; i++) {
1193     pDest[i] = pSrc[pData->nLength+i];
1194   }
1195   pData->nLength += i;
1196   *pcb = 2*i;
1197   GlobalUnlock(pData->hData);
1198   return 0;
1199 }
1200
1201 static DWORD CALLBACK ME_ReadFromHGLOBALRTF(DWORD_PTR dwCookie, LPBYTE lpBuff, LONG cb, LONG *pcb)
1202 {
1203   ME_GlobalDestStruct *pData = (ME_GlobalDestStruct *)dwCookie;
1204   int i;
1205   BYTE *pSrc, *pDest;
1206
1207   pDest = lpBuff;
1208   pSrc = (BYTE *)GlobalLock(pData->hData);
1209   for (i = 0; i<cb && pSrc[pData->nLength+i]; i++) {
1210     pDest[i] = pSrc[pData->nLength+i];
1211   }
1212   pData->nLength += i;
1213   *pcb = i;
1214   GlobalUnlock(pData->hData);
1215   return 0;
1216 }
1217
1218
1219 void ME_DestroyEditor(ME_TextEditor *editor)
1220 {
1221   ME_DisplayItem *pFirst = editor->pBuffer->pFirst;
1222   ME_DisplayItem *p = pFirst, *pNext = NULL;
1223   int i;
1224
1225   ME_ClearTempStyle(editor);
1226   ME_EmptyUndoStack(editor);
1227   while(p) {
1228     pNext = p->next;
1229     ME_DestroyDisplayItem(p);
1230     p = pNext;
1231   }
1232   ME_ReleaseStyle(editor->pBuffer->pDefaultStyle);
1233   for (i=0; i<HFONT_CACHE_SIZE; i++)
1234   {
1235     if (editor->pFontCache[i].hFont)
1236       DeleteObject(editor->pFontCache[i].hFont);
1237   }
1238   DeleteObject(editor->hbrBackground);
1239   if(editor->lpOleCallback)
1240     IUnknown_Release(editor->lpOleCallback);
1241
1242   FREE_OBJ(editor->pBuffer);
1243   FREE_OBJ(editor->pCursors);
1244
1245   FREE_OBJ(editor);
1246 }
1247
1248 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
1249 {
1250     TRACE("\n");
1251     switch (fdwReason)
1252     {
1253     case DLL_PROCESS_ATTACH:
1254       DisableThreadLibraryCalls(hinstDLL);
1255       me_heap = HeapCreate (0, 0x10000, 0);
1256       if (!ME_RegisterEditorClass(hinstDLL)) return FALSE;
1257       LookupInit();
1258       break;
1259
1260     case DLL_PROCESS_DETACH:
1261       UnregisterClassW(RichEdit20W, 0);
1262       UnregisterClassW(RichEdit50W, 0);
1263       UnregisterClassA("RichEdit20A", 0);
1264       UnregisterClassA("RichEdit50A", 0);
1265       if (ME_ListBoxRegistered)
1266           UnregisterClassW(REListBox20W, 0);
1267       if (ME_ComboBoxRegistered)
1268           UnregisterClassW(REComboBox20W, 0);
1269       LookupCleanup();
1270       HeapDestroy (me_heap);
1271       me_heap = NULL;
1272       break;
1273     }
1274     return TRUE;
1275 }
1276
1277
1278 #define UNSUPPORTED_MSG(e) \
1279   case e: \
1280     FIXME(#e ": stub\n"); \
1281     return DefWindowProcW(hWnd, msg, wParam, lParam);
1282
1283 static const char * const edit_messages[] = {
1284   "EM_GETSEL",
1285   "EM_SETSEL",
1286   "EM_GETRECT",
1287   "EM_SETRECT",
1288   "EM_SETRECTNP",
1289   "EM_SCROLL",
1290   "EM_LINESCROLL",
1291   "EM_SCROLLCARET",
1292   "EM_GETMODIFY",
1293   "EM_SETMODIFY",
1294   "EM_GETLINECOUNT",
1295   "EM_LINEINDEX",
1296   "EM_SETHANDLE",
1297   "EM_GETHANDLE",
1298   "EM_GETTHUMB",
1299   "EM_UNKNOWN_BF",
1300   "EM_UNKNOWN_C0",
1301   "EM_LINELENGTH",
1302   "EM_REPLACESEL",
1303   "EM_UNKNOWN_C3",
1304   "EM_GETLINE",
1305   "EM_LIMITTEXT",
1306   "EM_CANUNDO",
1307   "EM_UNDO",
1308   "EM_FMTLINES",
1309   "EM_LINEFROMCHAR",
1310   "EM_UNKNOWN_CA",
1311   "EM_SETTABSTOPS",
1312   "EM_SETPASSWORDCHAR",
1313   "EM_EMPTYUNDOBUFFER",
1314   "EM_GETFIRSTVISIBLELINE",
1315   "EM_SETREADONLY",
1316   "EM_SETWORDBREAKPROC",
1317   "EM_GETWORDBREAKPROC",
1318   "EM_GETPASSWORDCHAR",
1319   "EM_SETMARGINS",
1320   "EM_GETMARGINS",
1321   "EM_GETLIMITTEXT",
1322   "EM_POSFROMCHAR",
1323   "EM_CHARFROMPOS"
1324 };
1325
1326 static const char * const richedit_messages[] = {
1327   "EM_CANPASTE",
1328   "EM_DISPLAYBAND",
1329   "EM_EXGETSEL",
1330   "EM_EXLIMITTEXT",
1331   "EM_EXLINEFROMCHAR",
1332   "EM_EXSETSEL",
1333   "EM_FINDTEXT",
1334   "EM_FORMATRANGE",
1335   "EM_GETCHARFORMAT",
1336   "EM_GETEVENTMASK",
1337   "EM_GETOLEINTERFACE",
1338   "EM_GETPARAFORMAT",
1339   "EM_GETSELTEXT",
1340   "EM_HIDESELECTION",
1341   "EM_PASTESPECIAL",
1342   "EM_REQUESTRESIZE",
1343   "EM_SELECTIONTYPE",
1344   "EM_SETBKGNDCOLOR",
1345   "EM_SETCHARFORMAT",
1346   "EM_SETEVENTMASK",
1347   "EM_SETOLECALLBACK",
1348   "EM_SETPARAFORMAT",
1349   "EM_SETTARGETDEVICE",
1350   "EM_STREAMIN",
1351   "EM_STREAMOUT",
1352   "EM_GETTEXTRANGE",
1353   "EM_FINDWORDBREAK",
1354   "EM_SETOPTIONS",
1355   "EM_GETOPTIONS",
1356   "EM_FINDTEXTEX",
1357   "EM_GETWORDBREAKPROCEX",
1358   "EM_SETWORDBREAKPROCEX",
1359   "EM_SETUNDOLIMIT",
1360   "EM_UNKNOWN_USER_83",
1361   "EM_REDO",
1362   "EM_CANREDO",
1363   "EM_GETUNDONAME",
1364   "EM_GETREDONAME",
1365   "EM_STOPGROUPTYPING",
1366   "EM_SETTEXTMODE",
1367   "EM_GETTEXTMODE",
1368   "EM_AUTOURLDETECT",
1369   "EM_GETAUTOURLDETECT",
1370   "EM_SETPALETTE",
1371   "EM_GETTEXTEX",
1372   "EM_GETTEXTLENGTHEX",
1373   "EM_SHOWSCROLLBAR",
1374   "EM_SETTEXTEX",
1375   "EM_UNKNOWN_USER_98",
1376   "EM_UNKNOWN_USER_99",
1377   "EM_SETPUNCTUATION",
1378   "EM_GETPUNCTUATION",
1379   "EM_SETWORDWRAPMODE",
1380   "EM_GETWORDWRAPMODE",
1381   "EM_SETIMECOLOR",
1382   "EM_GETIMECOLOR",
1383   "EM_SETIMEOPTIONS",
1384   "EM_GETIMEOPTIONS",
1385   "EM_CONVPOSITION",
1386   "EM_UNKNOWN_USER_109",
1387   "EM_UNKNOWN_USER_110",
1388   "EM_UNKNOWN_USER_111",
1389   "EM_UNKNOWN_USER_112",
1390   "EM_UNKNOWN_USER_113",
1391   "EM_UNKNOWN_USER_114",
1392   "EM_UNKNOWN_USER_115",
1393   "EM_UNKNOWN_USER_116",
1394   "EM_UNKNOWN_USER_117",
1395   "EM_UNKNOWN_USER_118",
1396   "EM_UNKNOWN_USER_119",
1397   "EM_SETLANGOPTIONS",
1398   "EM_GETLANGOPTIONS",
1399   "EM_GETIMECOMPMODE",
1400   "EM_FINDTEXTW",
1401   "EM_FINDTEXTEXW",
1402   "EM_RECONVERSION",
1403   "EM_SETIMEMODEBIAS",
1404   "EM_GETIMEMODEBIAS"
1405 };
1406
1407 static const char *
1408 get_msg_name(UINT msg)
1409 {
1410   if (msg >= EM_GETSEL && msg <= EM_CHARFROMPOS)
1411     return edit_messages[msg - EM_GETSEL];
1412   if (msg >= EM_CANPASTE && msg <= EM_GETIMEMODEBIAS)
1413     return richedit_messages[msg - EM_CANPASTE];
1414   return "";
1415 }
1416
1417 static LRESULT RichEditWndProc_common(HWND hWnd, UINT msg, WPARAM wParam,
1418                                       LPARAM lParam, BOOL unicode)
1419 {
1420   ME_TextEditor *editor = (ME_TextEditor *)GetWindowLongPtrW(hWnd, 0);
1421
1422   TRACE("hwnd %p msg %04x (%s) %lx %lx, unicode %d\n",
1423         hWnd, msg, get_msg_name(msg), wParam, lParam, unicode);
1424
1425   if (!editor && msg != WM_NCCREATE && msg != WM_NCDESTROY) {
1426     ERR("called with invalid hWnd %p - application bug?\n", hWnd);
1427     return 0;
1428   }
1429
1430   switch(msg) {
1431
1432   UNSUPPORTED_MSG(EM_DISPLAYBAND)
1433   UNSUPPORTED_MSG(EM_FINDWORDBREAK)
1434   UNSUPPORTED_MSG(EM_FMTLINES)
1435   UNSUPPORTED_MSG(EM_FORMATRANGE)
1436   UNSUPPORTED_MSG(EM_GETBIDIOPTIONS)
1437   UNSUPPORTED_MSG(EM_GETEDITSTYLE)
1438   UNSUPPORTED_MSG(EM_GETIMECOMPMODE)
1439   /* UNSUPPORTED_MSG(EM_GETIMESTATUS) missing in Wine headers */
1440   UNSUPPORTED_MSG(EM_GETLANGOPTIONS)
1441   /* UNSUPPORTED_MSG(EM_GETOLEINTERFACE) separate stub */
1442   UNSUPPORTED_MSG(EM_GETREDONAME)
1443   UNSUPPORTED_MSG(EM_GETTEXTMODE)
1444   UNSUPPORTED_MSG(EM_GETTYPOGRAPHYOPTIONS)
1445   UNSUPPORTED_MSG(EM_GETUNDONAME)
1446   UNSUPPORTED_MSG(EM_GETWORDBREAKPROCEX)
1447   UNSUPPORTED_MSG(EM_PASTESPECIAL)
1448   UNSUPPORTED_MSG(EM_SELECTIONTYPE)
1449   UNSUPPORTED_MSG(EM_SETBIDIOPTIONS)
1450   UNSUPPORTED_MSG(EM_SETEDITSTYLE)
1451   UNSUPPORTED_MSG(EM_SETFONTSIZE)
1452   UNSUPPORTED_MSG(EM_SETLANGOPTIONS)
1453   UNSUPPORTED_MSG(EM_SETPALETTE)
1454   UNSUPPORTED_MSG(EM_SETTABSTOPS)
1455   UNSUPPORTED_MSG(EM_SETTARGETDEVICE)
1456   UNSUPPORTED_MSG(EM_SETTYPOGRAPHYOPTIONS)
1457   UNSUPPORTED_MSG(EM_SETWORDBREAKPROCEX)
1458   UNSUPPORTED_MSG(WM_STYLECHANGING)
1459   UNSUPPORTED_MSG(WM_STYLECHANGED)
1460 /*  UNSUPPORTED_MSG(WM_UNICHAR) FIXME missing in Wine headers */
1461
1462 /* Messages specific to Richedit controls */
1463
1464   case EM_STREAMIN:
1465    return ME_StreamIn(editor, wParam, (EDITSTREAM*)lParam);
1466   case EM_STREAMOUT:
1467    return ME_StreamOut(editor, wParam, (EDITSTREAM *)lParam);
1468   case WM_GETDLGCODE:
1469   {
1470     UINT code = DLGC_WANTCHARS|DLGC_WANTARROWS;
1471     if(lParam && (((LPMSG)lParam)->message == WM_KEYDOWN))
1472     {
1473       int vk = (int)((LPMSG)lParam)->wParam;
1474       /* if style says we want return key */
1475       if((vk == VK_RETURN) && (GetWindowLongW(hWnd, GWL_STYLE) & ES_WANTRETURN))
1476       {
1477         code |= DLGC_WANTMESSAGE;
1478       }
1479       /* we always handle ctrl-tab */
1480       if((vk == VK_TAB) && (GetKeyState(VK_CONTROL) & 0x8000))
1481       {
1482         code |= DLGC_WANTMESSAGE;
1483       }
1484     }
1485     return code;
1486   }
1487   case WM_NCCREATE:
1488   {
1489     CREATESTRUCTW *pcs = (CREATESTRUCTW *)lParam;
1490     TRACE("WM_NCCREATE: style 0x%08x\n", pcs->style);
1491     editor = ME_MakeEditor(hWnd);
1492     SetWindowLongPtrW(hWnd, 0, (LONG_PTR)editor);
1493     return TRUE;
1494   }
1495   case EM_EMPTYUNDOBUFFER:
1496     ME_EmptyUndoStack(editor);
1497     return 0;
1498   case EM_GETSEL:
1499   {
1500     /* Note: wParam/lParam can be NULL */
1501     UINT from, to;
1502     PUINT pfrom = wParam ? (PUINT)wParam : &from;
1503     PUINT pto = lParam ? (PUINT)lParam : &to;
1504     ME_GetSelection(editor, (int *)pfrom, (int *)pto);
1505     if ((*pfrom|*pto) & 0xFFFF0000)
1506       return -1;
1507     return MAKELONG(*pfrom,*pto);
1508   }
1509   case EM_EXGETSEL:
1510   {
1511     CHARRANGE *pRange = (CHARRANGE *)lParam;
1512     ME_GetSelection(editor, (int *)&pRange->cpMin, (int *)&pRange->cpMax);
1513     TRACE("EM_EXGETSEL = (%d,%d)\n", pRange->cpMin, pRange->cpMax);
1514     return 0;
1515   }
1516   case EM_SETUNDOLIMIT:
1517   {
1518     if ((int)wParam < 0)
1519       editor->nUndoLimit = STACK_SIZE_DEFAULT;
1520     else
1521       editor->nUndoLimit = min(wParam, STACK_SIZE_MAX);
1522     /* Setting a max stack size keeps wine from getting killed
1523       for hogging memory. Windows allocates all this memory at once, so
1524       no program would realistically set a value above our maximum. */
1525     return editor->nUndoLimit;
1526   }
1527   case EM_CANUNDO:
1528     return editor->pUndoStack != NULL;
1529   case EM_CANREDO:
1530     return editor->pRedoStack != NULL;
1531   case WM_UNDO: /* FIXME: actually not the same */
1532   case EM_UNDO:
1533     ME_Undo(editor);
1534     return 0;
1535   case EM_REDO:
1536     ME_Redo(editor);
1537     return 0;
1538   case EM_GETOPTIONS:
1539   {
1540     /* these flags are equivalent to the ES_* counterparts */
1541     DWORD mask = ECO_VERTICAL | ECO_AUTOHSCROLL | ECO_AUTOVSCROLL |
1542                  ECO_NOHIDESEL | ECO_READONLY | ECO_WANTRETURN;
1543     DWORD settings = GetWindowLongW(hWnd, GWL_STYLE) & mask;
1544
1545     return settings;
1546   }
1547   case EM_SETOPTIONS:
1548   {
1549     /* these flags are equivalent to ES_* counterparts
1550      * ECO_READONLY is already implemented in the code, only requires
1551      * setting the bit to work
1552      */
1553     DWORD mask = ECO_VERTICAL | ECO_AUTOHSCROLL | ECO_AUTOVSCROLL |
1554                  ECO_NOHIDESEL | ECO_READONLY | ECO_WANTRETURN;
1555     DWORD raw = GetWindowLongW(hWnd, GWL_STYLE);
1556     DWORD settings = mask & raw;
1557
1558     switch(wParam)
1559     {
1560       case ECOOP_SET:
1561         settings = lParam;
1562         break;
1563       case ECOOP_OR:
1564         settings |= lParam;
1565         break;
1566       case ECOOP_AND:
1567         settings &= lParam;
1568         break;
1569       case ECOOP_XOR:
1570         settings ^= lParam;
1571     }
1572     SetWindowLongW(hWnd, GWL_STYLE, (raw & ~mask) | (settings & mask));
1573
1574     if (lParam & ECO_AUTOWORDSELECTION)
1575       FIXME("ECO_AUTOWORDSELECTION not implemented yet!\n");
1576     if (lParam & ECO_SELECTIONBAR)
1577       FIXME("ECO_SELECTIONBAR not implemented yet!\n");
1578     if (lParam & ECO_VERTICAL)
1579       FIXME("ECO_VERTICAL not implemented yet!\n");
1580     if (lParam & ECO_AUTOHSCROLL)
1581       FIXME("ECO_AUTOHSCROLL not implemented yet!\n");
1582     if (lParam & ECO_AUTOVSCROLL)
1583       FIXME("ECO_AUTOVSCROLL not implemented yet!\n");
1584     if (lParam & ECO_NOHIDESEL)
1585       FIXME("ECO_NOHIDESEL not implemented yet!\n");
1586     if (lParam & ECO_WANTRETURN)
1587       FIXME("ECO_WANTRETURN not implemented yet!\n");
1588
1589     return settings;
1590   }
1591   case EM_SETSEL:
1592   {
1593     ME_InvalidateSelection(editor);
1594     ME_SetSelection(editor, wParam, lParam);
1595     ME_InvalidateSelection(editor);
1596     ME_SendSelChange(editor);
1597     return 0;
1598   }
1599   case EM_SETSCROLLPOS:
1600   {
1601     POINT *point = (POINT *)lParam;
1602     ME_ScrollAbs(editor, point->y);
1603     return 0;
1604   }
1605   case EM_AUTOURLDETECT:
1606   {
1607     if (wParam==1 || wParam ==0)
1608     {
1609         editor->AutoURLDetect_bEnable = (BOOL)wParam;
1610         return 0;
1611     }
1612     return E_INVALIDARG;
1613   }
1614   case EM_GETAUTOURLDETECT:
1615   {
1616     return editor->AutoURLDetect_bEnable;
1617   }
1618   case EM_EXSETSEL:
1619   {
1620     int end;
1621     CHARRANGE range = *(CHARRANGE *)lParam;
1622
1623     TRACE("EM_EXSETSEL (%d,%d)\n", range.cpMin, range.cpMax);
1624
1625     ME_InvalidateSelection(editor);
1626     end = ME_SetSelection(editor, range.cpMin, range.cpMax);
1627     ME_InvalidateSelection(editor);
1628     ME_SendSelChange(editor);
1629
1630     return end;
1631   }
1632   case EM_SHOWSCROLLBAR:
1633   {
1634     ShowScrollBar(editor->hWnd, wParam, lParam);
1635     return 0;
1636   }
1637   case EM_SETTEXTEX:
1638   {
1639     LPWSTR wszText;
1640     SETTEXTEX *pStruct = (SETTEXTEX *)wParam;
1641     size_t len;
1642     int from, to;
1643     ME_Style *style;
1644     int oldModify = editor->nModifyStep;
1645
1646     if (!pStruct) return 0;
1647
1648     TRACE("EM_SETTEXTEX - %s, flags %d, cp %d\n",
1649           pStruct->codepage == 1200 ? debugstr_w((LPCWSTR)lParam) : debugstr_a((LPCSTR)lParam),
1650           pStruct->flags, pStruct->codepage);
1651
1652     /* FIXME: make use of pStruct->codepage in the to unicode translation */
1653     wszText = lParam ? ME_ToUnicode(pStruct->codepage == 1200, (void *)lParam) : NULL;
1654     len = wszText ? lstrlenW(wszText) : 0;
1655
1656     /* FIXME: this should support RTF strings too, according to MSDN */
1657     if (pStruct->flags & ST_SELECTION) {
1658       ME_GetSelection(editor, &from, &to);
1659       style = ME_GetSelectionInsertStyle(editor);
1660       ME_InternalDeleteText(editor, from, to - from);
1661       ME_InsertTextFromCursor(editor, 0, wszText, len, style);
1662       ME_ReleaseStyle(style);
1663     }
1664     else {
1665       ME_InternalDeleteText(editor, 0, ME_GetTextLength(editor));
1666       ME_InsertTextFromCursor(editor, 0, wszText, len, editor->pBuffer->pDefaultStyle);
1667       len = 1;
1668     }
1669     ME_CommitUndo(editor);
1670     if (!(pStruct->flags & ST_KEEPUNDO))
1671     {
1672       editor->nModifyStep = oldModify;
1673       ME_EmptyUndoStack(editor);
1674     }
1675     ME_UpdateRepaint(editor);
1676     return len;
1677   }
1678   case EM_SETBKGNDCOLOR:
1679   {
1680     LRESULT lColor = ME_GetBackColor(editor);
1681     if (editor->rgbBackColor != -1)
1682       DeleteObject(editor->hbrBackground);
1683     if (wParam)
1684     {
1685       editor->rgbBackColor = -1;
1686       editor->hbrBackground = GetSysColorBrush(COLOR_WINDOW);
1687     }
1688     else
1689     {
1690       editor->rgbBackColor = lParam;
1691       editor->hbrBackground = CreateSolidBrush(editor->rgbBackColor);
1692     }
1693     if (editor->bRedraw)
1694     {
1695       InvalidateRect(hWnd, NULL, TRUE);
1696       UpdateWindow(hWnd);
1697     }
1698     return lColor;
1699   }
1700   case EM_GETMODIFY:
1701     return editor->nModifyStep == 0 ? 0 : 1;
1702   case EM_SETMODIFY:
1703   {
1704     if (wParam)
1705       editor->nModifyStep = 1;
1706     else
1707       editor->nModifyStep = 0;
1708
1709     return 0;
1710   }
1711   case EM_SETREADONLY:
1712   {
1713     long nStyle = GetWindowLongW(hWnd, GWL_STYLE);
1714     if (wParam)
1715       nStyle |= ES_READONLY;
1716     else
1717       nStyle &= ~ES_READONLY;
1718     SetWindowLongW(hWnd, GWL_STYLE, nStyle);
1719     return 0;
1720   }
1721   case EM_SETEVENTMASK:
1722   {
1723     DWORD nOldMask = editor->nEventMask;
1724
1725     editor->nEventMask = lParam;
1726     return nOldMask;
1727   }
1728   case EM_GETEVENTMASK:
1729     return editor->nEventMask;
1730   case EM_SETCHARFORMAT:
1731   {
1732     CHARFORMAT2W buf, *p;
1733     BOOL bRepaint = TRUE;
1734     p = ME_ToCF2W(&buf, (CHARFORMAT2W *)lParam);
1735     if (!wParam || (editor->mode & TM_PLAINTEXT))
1736       ME_SetDefaultCharFormat(editor, p);
1737     else if (wParam == (SCF_WORD | SCF_SELECTION))
1738       FIXME("EM_SETCHARFORMAT: word selection not supported\n");
1739     else if (wParam == SCF_ALL)
1740       ME_SetCharFormat(editor, 0, ME_GetTextLength(editor), p);
1741     else {
1742       int from, to;
1743       ME_GetSelection(editor, &from, &to);
1744       bRepaint = (from != to);
1745       ME_SetSelectionCharFormat(editor, p);
1746     }
1747     editor->nModifyStep = 1;
1748     ME_CommitUndo(editor);
1749     if (bRepaint)
1750       ME_RewrapRepaint(editor);
1751     return 0;
1752   }
1753   case EM_GETCHARFORMAT:
1754   {
1755     CHARFORMAT2W tmp, *dst = (CHARFORMAT2W *)lParam;
1756     if (dst->cbSize != sizeof(CHARFORMATA) &&
1757         dst->cbSize != sizeof(CHARFORMATW) &&
1758         dst->cbSize != sizeof(CHARFORMAT2A) &&
1759         dst->cbSize != sizeof(CHARFORMAT2W))
1760       return 0;
1761     tmp.cbSize = sizeof(tmp);
1762     if (!wParam)
1763       ME_GetDefaultCharFormat(editor, &tmp);
1764     else
1765       ME_GetSelectionCharFormat(editor, &tmp);
1766     ME_CopyToCFAny(dst, &tmp);
1767     return tmp.dwMask;
1768   }
1769   case EM_SETPARAFORMAT:
1770     ME_SetSelectionParaFormat(editor, (PARAFORMAT2 *)lParam);
1771     ME_RewrapRepaint(editor);
1772     ME_CommitUndo(editor);
1773     return 0;
1774   case EM_GETPARAFORMAT:
1775     ME_GetSelectionParaFormat(editor, (PARAFORMAT2 *)lParam);
1776     return 0;
1777   case EM_GETFIRSTVISIBLELINE:
1778   {
1779     ME_DisplayItem *p = editor->pBuffer->pFirst;
1780     int y = ME_GetYScrollPos(editor);
1781     int ypara = 0;
1782     int count = 0;
1783     int ystart, yend;
1784     while(p) {
1785       p = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
1786       if (p->type == diTextEnd)
1787         break;
1788       if (p->type == diParagraph) {
1789         ypara = p->member.para.nYPos;
1790         continue;
1791       }
1792       ystart = ypara + p->member.row.nYPos;
1793       yend = ystart + p->member.row.nHeight;
1794       if (y < yend) {
1795         break;
1796       }
1797       count++;
1798     }
1799     return count;
1800   }
1801   case EM_HIDESELECTION:
1802   {
1803      editor->bHideSelection = (wParam != 0);
1804      ME_InvalidateSelection(editor);
1805      return 0;
1806   }
1807   case EM_LINESCROLL:
1808   {
1809     ME_ScrollDown(editor, lParam * 8); /* FIXME follow the original */
1810     return TRUE; /* Should return false if a single line richedit control */
1811   }
1812   case WM_CLEAR:
1813   {
1814     int from, to;
1815     ME_GetSelection(editor, &from, &to);
1816     ME_InternalDeleteText(editor, from, to-from);
1817     ME_CommitUndo(editor);
1818     ME_UpdateRepaint(editor);
1819     return 0;
1820   }
1821   case EM_REPLACESEL:
1822   {
1823     int from, to;
1824     ME_Style *style;
1825     LPWSTR wszText = ME_ToUnicode(unicode, (void *)lParam);
1826     size_t len = lstrlenW(wszText);
1827     TRACE("EM_REPLACESEL - %s\n", debugstr_w(wszText));
1828
1829     ME_GetSelection(editor, &from, &to);
1830     style = ME_GetSelectionInsertStyle(editor);
1831     ME_InternalDeleteText(editor, from, to-from);
1832     ME_InsertTextFromCursor(editor, 0, wszText, len, style);
1833     ME_ReleaseStyle(style);
1834     /* drop temporary style if line end */
1835     /*
1836      * FIXME question: does abc\n mean: put abc,
1837      * clear temp style, put \n? (would require a change)
1838      */
1839     if (len>0 && wszText[len-1] == '\n')
1840       ME_ClearTempStyle(editor);
1841     ME_EndToUnicode(unicode, wszText);
1842     ME_CommitUndo(editor);
1843     if (!wParam)
1844       ME_EmptyUndoStack(editor);
1845     ME_UpdateRepaint(editor);
1846     return 0;
1847   }
1848   case EM_SCROLLCARET:
1849   {
1850     int top, bottom; /* row's edges relative to document top */
1851     int nPos;
1852     ME_DisplayItem *para, *row;
1853
1854     nPos = ME_GetYScrollPos(editor);
1855     row = ME_RowStart(editor->pCursors[0].pRun);
1856     para = ME_GetParagraph(row);
1857     top = para->member.para.nYPos + row->member.row.nYPos;
1858     bottom = top + row->member.row.nHeight;
1859
1860     if (top < nPos) /* caret above window */
1861       ME_ScrollAbs(editor,  top);
1862     else if (nPos + editor->sizeWindow.cy < bottom) /*below*/
1863       ME_ScrollAbs(editor, bottom - editor->sizeWindow.cy);
1864     return 0;
1865   }
1866   case WM_SETFONT:
1867   {
1868     LOGFONTW lf;
1869     CHARFORMAT2W fmt;
1870     HDC hDC;
1871     BOOL bRepaint = LOWORD(lParam);
1872
1873     if (!wParam)
1874       wParam = (WPARAM)GetStockObject(SYSTEM_FONT);
1875     GetObjectW((HGDIOBJ)wParam, sizeof(LOGFONTW), &lf);
1876     hDC = GetDC(hWnd);
1877     ME_CharFormatFromLogFont(hDC, &lf, &fmt);
1878     ReleaseDC(hWnd, hDC);
1879     ME_SetCharFormat(editor, 0, ME_GetTextLength(editor), &fmt);
1880     ME_SetDefaultCharFormat(editor, &fmt);
1881
1882     ME_CommitUndo(editor);
1883     if (bRepaint)
1884       ME_RewrapRepaint(editor);
1885     return 0;
1886   }
1887   case WM_SETTEXT:
1888   {
1889     ME_InternalDeleteText(editor, 0, ME_GetTextLength(editor));
1890     if (lParam)
1891     {
1892       TRACE("WM_SETTEXT lParam==%lx\n",lParam);
1893       if (!unicode && !strncmp((char *)lParam, "{\\rtf", 5))
1894       {
1895         /* Undocumented: WM_SETTEXT supports RTF text */
1896         ME_StreamInRTFString(editor, 0, (char *)lParam);
1897       }
1898       else
1899       {
1900         LPWSTR wszText = ME_ToUnicode(unicode, (void *)lParam);
1901         TRACE("WM_SETTEXT - %s\n", debugstr_w(wszText)); /* debugstr_w() */
1902         if (lstrlenW(wszText) > 0)
1903         {
1904           /* uses default style! */
1905           ME_InsertTextFromCursor(editor, 0, wszText, -1, editor->pBuffer->pDefaultStyle);
1906         }
1907         ME_EndToUnicode(unicode, wszText);
1908       }
1909     }
1910     else
1911       TRACE("WM_SETTEXT - NULL\n");
1912     ME_CommitUndo(editor);
1913     ME_EmptyUndoStack(editor);
1914     ME_SetSelection(editor, 0, 0);
1915     ME_UpdateRepaint(editor);
1916     return 1;
1917   }
1918   case EM_CANPASTE:
1919   {
1920     UINT nRTFFormat = RegisterClipboardFormatA("Rich Text Format");
1921     if (IsClipboardFormatAvailable(nRTFFormat))
1922       return TRUE;
1923     if (IsClipboardFormatAvailable(CF_UNICODETEXT))
1924       return TRUE;
1925     return FALSE;
1926   }
1927   case WM_PASTE:
1928   {
1929     DWORD dwFormat = 0;
1930     EDITSTREAM es;
1931     ME_GlobalDestStruct gds;
1932     UINT nRTFFormat = RegisterClipboardFormatA("Rich Text Format");
1933     UINT cf = 0;
1934
1935     if (IsClipboardFormatAvailable(nRTFFormat))
1936       cf = nRTFFormat, dwFormat = SF_RTF;
1937     else if (IsClipboardFormatAvailable(CF_UNICODETEXT))
1938       cf = CF_UNICODETEXT, dwFormat = SF_TEXT|SF_UNICODE;
1939     else
1940       return 0;
1941
1942     if (!OpenClipboard(hWnd))
1943       return 0;
1944     gds.hData = GetClipboardData(cf);
1945     gds.nLength = 0;
1946     es.dwCookie = (DWORD)&gds;
1947     es.pfnCallback = dwFormat == SF_RTF ? ME_ReadFromHGLOBALRTF : ME_ReadFromHGLOBALUnicode;
1948     ME_StreamIn(editor, dwFormat|SFF_SELECTION, &es);
1949
1950     CloseClipboard();
1951     return 0;
1952   }
1953   case WM_CUT:
1954   case WM_COPY:
1955   {
1956     LPDATAOBJECT dataObj = NULL;
1957     CHARRANGE range;
1958     HRESULT hr = S_OK;
1959
1960     if (editor->cPasswordMask)
1961       return 0; /* Copying or Cutting masked text isn't allowed */
1962
1963     ME_GetSelection(editor, (int*)&range.cpMin, (int*)&range.cpMax);
1964     if(editor->lpOleCallback)
1965         hr = IRichEditOleCallback_GetClipboardData(editor->lpOleCallback, &range, RECO_COPY, &dataObj);
1966     if(FAILED(hr) || !dataObj)
1967         hr = ME_GetDataObject(editor, &range, &dataObj);
1968     if(SUCCEEDED(hr)) {
1969         hr = OleSetClipboard(dataObj);
1970         IDataObject_Release(dataObj);
1971     }
1972     if (SUCCEEDED(hr) && msg == WM_CUT)
1973     {
1974       ME_InternalDeleteText(editor, range.cpMin, range.cpMax-range.cpMin);
1975       ME_CommitUndo(editor);
1976       ME_UpdateRepaint(editor);
1977     }
1978     return 0;
1979   }
1980   case WM_GETTEXTLENGTH:
1981     return ME_GetTextLength(editor);
1982   case EM_GETTEXTLENGTHEX:
1983     return ME_GetTextLengthEx(editor, (GETTEXTLENGTHEX *)wParam);
1984   case WM_GETTEXT:
1985   {
1986     TEXTRANGEW tr; /* W and A differ only by rng->lpstrText */
1987     tr.chrg.cpMin = 0;
1988     tr.chrg.cpMax = wParam ? (wParam - 1) : 0;
1989     tr.lpstrText = (WCHAR *)lParam;
1990     return RichEditWndProc_common(hWnd, EM_GETTEXTRANGE, 0, (LPARAM)&tr, unicode);
1991   }
1992   case EM_GETTEXTEX:
1993   {
1994     GETTEXTEX *ex = (GETTEXTEX*)wParam;
1995     int nStart, nCount;
1996
1997     if (ex->flags & ~(GT_SELECTION | GT_USECRLF))
1998       FIXME("GETTEXTEX flags 0x%08x not supported\n", ex->flags & ~(GT_SELECTION | GT_USECRLF));
1999
2000     if (ex->flags & GT_SELECTION)
2001     {
2002       ME_GetSelection(editor, &nStart, &nCount);
2003       nCount -= nStart;
2004       nCount = min(nCount, ex->cb - 1);
2005     }
2006     else
2007     {
2008       nStart = 0;
2009       nCount = ex->cb - 1;
2010     }
2011     if (ex->codepage == 1200)
2012     {
2013       nCount = min(nCount, ex->cb / sizeof(WCHAR) - 1);
2014       return ME_GetTextW(editor, (LPWSTR)lParam, nStart, nCount, ex->flags & GT_USECRLF);
2015     }
2016     else
2017     {
2018       /* potentially each char may be a CR, why calculate the exact value with O(N) when
2019         we can just take a bigger buffer? :) */
2020       int crlfmul = (ex->flags & GT_USECRLF) ? 2 : 1;
2021       LPWSTR buffer = richedit_alloc((crlfmul*nCount + 1) * sizeof(WCHAR));
2022       DWORD buflen = ex->cb;
2023       LRESULT rc;
2024       DWORD flags = 0;
2025
2026       buflen = ME_GetTextW(editor, buffer, nStart, nCount, ex->flags & GT_USECRLF);
2027       rc = WideCharToMultiByte(ex->codepage, flags, buffer, -1, (LPSTR)lParam, ex->cb, ex->lpDefaultChar, ex->lpUsedDefaultChar);
2028       if (rc) rc--; /* do not count 0 terminator */
2029
2030       richedit_free(buffer);
2031       return rc;
2032     }
2033   }
2034   case EM_GETSELTEXT:
2035   {
2036     int from, to;
2037     TEXTRANGEW tr; /* W and A differ only by rng->lpstrText */
2038     ME_GetSelection(editor, &from, &to);
2039     tr.chrg.cpMin = from;
2040     tr.chrg.cpMax = to;
2041     tr.lpstrText = (WCHAR *)lParam;
2042     return RichEditWndProc_common(hWnd, EM_GETTEXTRANGE, 0, (LPARAM)&tr, unicode);
2043   }
2044   case EM_GETSCROLLPOS:
2045   {
2046       POINT *point = (POINT *)lParam;
2047       point->x = 0; /* FIXME side scrolling not implemented */
2048       point->y = ME_GetYScrollPos(editor);
2049       return 1;
2050   }
2051   case EM_GETTEXTRANGE:
2052   {
2053     TEXTRANGEW *rng = (TEXTRANGEW *)lParam;
2054     TRACE("EM_GETTEXTRANGE min=%d max=%d unicode=%d emul1.0=%d length=%d\n",
2055       rng->chrg.cpMin, rng->chrg.cpMax, unicode,
2056       editor->bEmulateVersion10, ME_GetTextLength(editor));
2057     if (unicode)
2058       return ME_GetTextW(editor, rng->lpstrText, rng->chrg.cpMin, rng->chrg.cpMax-rng->chrg.cpMin, editor->bEmulateVersion10);
2059     else
2060     {
2061       int nLen = rng->chrg.cpMax-rng->chrg.cpMin;
2062       WCHAR *p = ALLOC_N_OBJ(WCHAR, nLen+1);
2063       int nChars = ME_GetTextW(editor, p, rng->chrg.cpMin, nLen, editor->bEmulateVersion10);
2064       /* FIXME this is a potential security hole (buffer overrun)
2065          if you know more about wchar->mbyte conversion please explain
2066       */
2067       WideCharToMultiByte(CP_ACP, 0, p, nChars+1, (char *)rng->lpstrText, nLen+1, NULL, NULL);
2068       FREE_OBJ(p);
2069       return nChars;
2070     }
2071   }
2072   case EM_GETLINE:
2073   {
2074     ME_DisplayItem *run;
2075     const unsigned int nMaxChars = *(WORD *) lParam;
2076     unsigned int nEndChars, nCharsLeft = nMaxChars;
2077     char *dest = (char *) lParam;
2078     /* rich text editor 1.0 uses \r\n for line end, 2.0 uses just \r;
2079     we need to know how if we have the extra \n or not */
2080     int nLF = editor->bEmulateVersion10;
2081
2082     TRACE("EM_GETLINE: row=%d, nMaxChars=%d (%s)\n", (int) wParam, nMaxChars,
2083           unicode ? "Unicode" : "Ansi");
2084
2085     run = ME_FindRowWithNumber(editor, wParam);
2086     if (run == NULL)
2087       return 0;
2088
2089     while (nCharsLeft && (run = ME_FindItemFwd(run, diRunOrStartRow))
2090            && !(run->member.run.nFlags & MERF_ENDPARA))
2091     {
2092       unsigned int nCopy;
2093       ME_String *strText;
2094       if (run->type != diRun)
2095         break;
2096       strText = run->member.run.strText;
2097       nCopy = min(nCharsLeft, strText->nLen);
2098
2099       if (unicode)
2100         lstrcpynW((LPWSTR) dest, strText->szData, nCopy);
2101       else
2102         nCopy = WideCharToMultiByte(CP_ACP, 0, strText->szData, nCopy, dest,
2103                                     nCharsLeft, NULL, NULL);
2104       dest += nCopy * (unicode ? sizeof(WCHAR) : 1);
2105       nCharsLeft -= nCopy;
2106     }
2107
2108     /* append \r\0 (or \r\n\0 in 1.0), space allowing */
2109     nEndChars = min(nCharsLeft, 2 + nLF);
2110     nCharsLeft -= nEndChars;
2111     if (unicode)
2112     {
2113       const WCHAR src[] = {'\r', '\0'};
2114       const WCHAR src10[] = {'\r', '\n', '\0'};
2115       lstrcpynW((LPWSTR) dest, nLF ? src10 : src, nEndChars);
2116     }
2117     else
2118       lstrcpynA(dest, nLF ? "\r\n" : "\r", nEndChars);
2119
2120     TRACE("EM_GETLINE: got %u bytes\n", nMaxChars - nCharsLeft);
2121
2122     if (nEndChars == 2 + nLF)
2123       return nMaxChars - nCharsLeft - 1; /* don't count \0 */
2124     else
2125       return nMaxChars - nCharsLeft;
2126   }
2127   case EM_GETLINECOUNT:
2128   {
2129     ME_DisplayItem *item = editor->pBuffer->pFirst->next;
2130     int nRows = 0;
2131
2132     while (item != editor->pBuffer->pLast)
2133     {
2134       assert(item->type == diParagraph);
2135       nRows += item->member.para.nRows;
2136       item = item->member.para.next_para;
2137     }
2138     TRACE("EM_GETLINECOUNT: nRows==%d\n", nRows);
2139     return max(1, nRows);
2140   }
2141   case EM_LINEFROMCHAR:
2142   {
2143     if (wParam == -1)
2144       return ME_RowNumberFromCharOfs(editor, ME_GetCursorOfs(editor, 1));
2145     else
2146       return ME_RowNumberFromCharOfs(editor, wParam);
2147   }
2148   case EM_EXLINEFROMCHAR:
2149   {
2150     if (lParam == -1)
2151       return ME_RowNumberFromCharOfs(editor, ME_GetCursorOfs(editor,1));
2152     else
2153       return ME_RowNumberFromCharOfs(editor, lParam);
2154   }
2155   case EM_LINEINDEX:
2156   {
2157     ME_DisplayItem *item, *para;
2158     int nCharOfs;
2159
2160     if (wParam == -1)
2161       item = ME_FindItemBack(editor->pCursors[0].pRun, diStartRow);
2162     else
2163       item = ME_FindRowWithNumber(editor, wParam);
2164     if (!item)
2165       return -1;
2166     para = ME_GetParagraph(item);
2167     item = ME_FindItemFwd(item, diRun);
2168     nCharOfs = para->member.para.nCharOfs + item->member.run.nCharOfs;
2169     TRACE("EM_LINEINDEX: nCharOfs==%d\n", nCharOfs);
2170     return nCharOfs;
2171   }
2172   case EM_LINELENGTH:
2173   {
2174     ME_DisplayItem *item, *item_end;
2175     int nChars = 0, nThisLineOfs = 0, nNextLineOfs = 0;
2176
2177     if (wParam > ME_GetTextLength(editor))
2178       return 0;
2179     if (wParam == -1)
2180     {
2181       FIXME("EM_LINELENGTH: returning number of unselected characters on lines with selection unsupported.\n");
2182       return 0;
2183     }
2184     item = ME_FindItemAtOffset(editor, diRun, wParam, NULL);
2185     item = ME_RowStart(item);
2186     nThisLineOfs = ME_CharOfsFromRunOfs(editor, ME_FindItemFwd(item, diRun), 0);
2187     item_end = ME_FindItemFwd(item, diStartRowOrParagraphOrEnd);
2188     if (item_end->type == diStartRow)
2189       nNextLineOfs = ME_CharOfsFromRunOfs(editor, ME_FindItemFwd(item_end, diRun), 0);
2190     else
2191       nNextLineOfs = ME_FindItemFwd(item, diParagraphOrEnd)->member.para.nCharOfs
2192        - (editor->bEmulateVersion10?2:1);
2193     nChars = nNextLineOfs - nThisLineOfs;
2194     TRACE("EM_LINELENGTH(%ld)==%d\n",wParam, nChars);
2195     return nChars;
2196   }
2197   case EM_EXLIMITTEXT:
2198   {
2199     if ((int)lParam < 0)
2200      return 0;
2201     if (lParam == 0)
2202       editor->nTextLimit = 65536;
2203     else
2204       editor->nTextLimit = (int) lParam;
2205     return 0;
2206   }
2207   case EM_LIMITTEXT:
2208   {
2209     if (wParam == 0)
2210       editor->nTextLimit = 65536;
2211     else
2212       editor->nTextLimit = (int) wParam;
2213     return 0;
2214   }
2215   case EM_GETLIMITTEXT:
2216   {
2217     return editor->nTextLimit;
2218   }
2219   case EM_FINDTEXT:
2220   {
2221     FINDTEXTA *ft = (FINDTEXTA *)lParam;
2222     int nChars = MultiByteToWideChar(CP_ACP, 0, ft->lpstrText, -1, NULL, 0);
2223     WCHAR *tmp;
2224     LRESULT r;
2225
2226     if ((tmp = ALLOC_N_OBJ(WCHAR, nChars)) != NULL)
2227       MultiByteToWideChar(CP_ACP, 0, ft->lpstrText, -1, tmp, nChars);
2228     r = ME_FindText(editor, wParam, &ft->chrg, tmp, NULL);
2229     FREE_OBJ( tmp );
2230     return r;
2231   }
2232   case EM_FINDTEXTEX:
2233   {
2234     FINDTEXTEXA *ex = (FINDTEXTEXA *)lParam;
2235     int nChars = MultiByteToWideChar(CP_ACP, 0, ex->lpstrText, -1, NULL, 0);
2236     WCHAR *tmp;
2237     LRESULT r;
2238
2239     if ((tmp = ALLOC_N_OBJ(WCHAR, nChars)) != NULL)
2240       MultiByteToWideChar(CP_ACP, 0, ex->lpstrText, -1, tmp, nChars);
2241     r = ME_FindText(editor, wParam, &ex->chrg, tmp, &ex->chrgText);
2242     FREE_OBJ( tmp );
2243     return r;
2244   }
2245   case EM_FINDTEXTW:
2246   {
2247     FINDTEXTW *ft = (FINDTEXTW *)lParam;
2248     return ME_FindText(editor, wParam, &ft->chrg, ft->lpstrText, NULL);
2249   }
2250   case EM_FINDTEXTEXW:
2251   {
2252     FINDTEXTEXW *ex = (FINDTEXTEXW *)lParam;
2253     return ME_FindText(editor, wParam, &ex->chrg, ex->lpstrText, &ex->chrgText);
2254   }
2255   case EM_GETZOOM:
2256     if (!wParam || !lParam)
2257       return FALSE;
2258     *(int *)wParam = editor->nZoomNumerator;
2259     *(int *)lParam = editor->nZoomDenominator;
2260     return TRUE;
2261   case EM_SETZOOM:
2262     return ME_SetZoom(editor, wParam, lParam);
2263   case EM_CHARFROMPOS:
2264     return ME_CharFromPos(editor, ((POINTL *)lParam)->x, ((POINTL *)lParam)->y);
2265   case EM_POSFROMCHAR:
2266   {
2267     ME_DisplayItem *pRun;
2268     int nCharOfs, nOffset, nLength;
2269     POINTL pt = {0,0};
2270
2271     nCharOfs = wParam;
2272     /* detect which API version we're dealing with */
2273     if (wParam >= 0x40000)
2274         nCharOfs = lParam;
2275     nLength = ME_GetTextLength(editor);
2276
2277     if (nCharOfs < nLength) {
2278         ME_RunOfsFromCharOfs(editor, nCharOfs, &pRun, &nOffset);
2279         assert(pRun->type == diRun);
2280         pt.y = pRun->member.run.pt.y;
2281         pt.x = pRun->member.run.pt.x + ME_PointFromChar(editor, &pRun->member.run, nOffset);
2282         pt.y += ME_GetParagraph(pRun)->member.para.nYPos;
2283     } else {
2284         pt.x = 0;
2285         pt.y = editor->pBuffer->pLast->member.para.nYPos;
2286     }
2287     if (wParam >= 0x40000) {
2288         *(POINTL *)wParam = pt;
2289     }
2290     return MAKELONG( pt.x, pt.y );
2291   }
2292   case WM_CREATE:
2293     if (GetWindowLongW(hWnd, GWL_STYLE) & WS_HSCROLL)
2294     { /* Squelch the default horizontal scrollbar it would make */
2295       ShowScrollBar(editor->hWnd, SB_HORZ, FALSE);
2296     }
2297     ME_CommitUndo(editor);
2298     ME_WrapMarkedParagraphs(editor);
2299     ME_MoveCaret(editor);
2300     return 0;
2301   case WM_DESTROY:
2302     ME_DestroyEditor(editor);
2303     SetWindowLongPtrW(hWnd, 0, 0);
2304     return 0;
2305   case WM_LBUTTONDOWN:
2306     SetFocus(hWnd);
2307     ME_LButtonDown(editor, (short)LOWORD(lParam), (short)HIWORD(lParam));
2308     SetCapture(hWnd);
2309     ME_LinkNotify(editor,msg,wParam,lParam);
2310     break;
2311   case WM_MOUSEMOVE:
2312     if (GetCapture() == hWnd)
2313       ME_MouseMove(editor, (short)LOWORD(lParam), (short)HIWORD(lParam));
2314     ME_LinkNotify(editor,msg,wParam,lParam);
2315     break;
2316   case WM_LBUTTONUP:
2317     if (GetCapture() == hWnd)
2318       ReleaseCapture();
2319     ME_LinkNotify(editor,msg,wParam,lParam);
2320     break;
2321   case WM_LBUTTONDBLCLK:
2322     ME_LinkNotify(editor,msg,wParam,lParam);
2323     ME_SelectWord(editor);
2324     break;
2325   case WM_CONTEXTMENU:
2326     if (!ME_ShowContextMenu(editor, (short)LOWORD(lParam), (short)HIWORD(lParam)))
2327       goto do_default;
2328     break;
2329   case WM_PAINT:
2330     if (editor->bRedraw)
2331     {
2332       HDC hDC;
2333       PAINTSTRUCT ps;
2334
2335       hDC = BeginPaint(hWnd, &ps);
2336       ME_PaintContent(editor, hDC, FALSE, &ps.rcPaint);
2337       EndPaint(hWnd, &ps);
2338     }
2339     break;
2340   case WM_SETFOCUS:
2341     editor->bHaveFocus = TRUE;
2342     ME_ShowCaret(editor);
2343     ME_SendOldNotify(editor, EN_SETFOCUS);
2344     return 0;
2345   case WM_KILLFOCUS:
2346     ME_HideCaret(editor);
2347     editor->bHaveFocus = FALSE;
2348     ME_SendOldNotify(editor, EN_KILLFOCUS);
2349     return 0;
2350   case WM_ERASEBKGND:
2351   {
2352     if (editor->bRedraw)
2353     {
2354       HDC hDC = (HDC)wParam;
2355       RECT rc;
2356       if (GetUpdateRect(hWnd,&rc,TRUE))
2357       {
2358         FillRect(hDC, &rc, editor->hbrBackground);
2359       }
2360     }
2361     return 1;
2362   }
2363   case WM_COMMAND:
2364     TRACE("editor wnd command = %d\n", LOWORD(wParam));
2365     return 0;
2366   case WM_KEYDOWN:
2367     if (ME_KeyDown(editor, LOWORD(wParam)))
2368       return 0;
2369     goto do_default;
2370   case WM_CHAR:
2371   {
2372     WCHAR wstr;
2373
2374     if (unicode)
2375         wstr = (WCHAR)wParam;
2376     else
2377     {
2378         CHAR charA = wParam;
2379         MultiByteToWideChar(CP_ACP, 0, &charA, 1, &wstr, 1);
2380     }
2381     if (editor->AutoURLDetect_bEnable)
2382       ME_AutoURLDetect(editor, wstr);
2383
2384     switch (wstr)
2385     {
2386     case 1: /* Ctrl-A */
2387       ME_SetSelection(editor, 0, -1);
2388       return 0;
2389     case 3: /* Ctrl-C */
2390       SendMessageW(editor->hWnd, WM_COPY, 0, 0);
2391       return 0;
2392     }
2393
2394     if (GetWindowLongW(editor->hWnd, GWL_STYLE) & ES_READONLY) {
2395       MessageBeep(MB_ICONERROR);
2396       return 0; /* FIXME really 0 ? */
2397     }
2398
2399     switch (wstr)
2400     {
2401     case 22: /* Ctrl-V */
2402       SendMessageW(editor->hWnd, WM_PASTE, 0, 0);
2403       return 0;
2404     case 24: /* Ctrl-X */
2405       SendMessageW(editor->hWnd, WM_CUT, 0, 0);
2406       return 0;
2407     case 25: /* Ctrl-Y */
2408       SendMessageW(editor->hWnd, EM_REDO, 0, 0);
2409       return 0;
2410     case 26: /* Ctrl-Z */
2411       SendMessageW(editor->hWnd, EM_UNDO, 0, 0);
2412       return 0;
2413     }
2414     if (((unsigned)wstr)>=' ' || wstr=='\r' || wstr=='\t') {
2415       /* FIXME maybe it would make sense to call EM_REPLACESEL instead ? */
2416       ME_Style *style = ME_GetInsertStyle(editor, 0);
2417       ME_SaveTempStyle(editor);
2418       ME_InsertTextFromCursor(editor, 0, &wstr, 1, style);
2419       ME_ReleaseStyle(style);
2420       ME_CommitUndo(editor);
2421       ME_UpdateRepaint(editor);
2422     }
2423     return 0;
2424   }
2425   case EM_SCROLL: /* fall through */
2426   case WM_VSCROLL:
2427   {
2428     int origNPos;
2429     int lineHeight;
2430
2431     origNPos = ME_GetYScrollPos(editor);
2432     lineHeight = 24;
2433
2434     if (editor && editor->pBuffer && editor->pBuffer->pDefaultStyle)
2435       lineHeight = editor->pBuffer->pDefaultStyle->tm.tmHeight;
2436     if (lineHeight <= 0) lineHeight = 24;
2437
2438     switch(LOWORD(wParam))
2439     {
2440       case SB_LINEUP:
2441         ME_ScrollUp(editor,lineHeight);
2442         break;
2443       case SB_LINEDOWN:
2444         ME_ScrollDown(editor,lineHeight);
2445         break;
2446       case SB_PAGEUP:
2447         ME_ScrollUp(editor,editor->sizeWindow.cy);
2448         break;
2449       case SB_PAGEDOWN:
2450         ME_ScrollDown(editor,editor->sizeWindow.cy);
2451         break;
2452       case SB_THUMBTRACK:
2453       case SB_THUMBPOSITION:
2454         ME_ScrollAbs(editor,HIWORD(wParam));
2455         break;
2456     }
2457     if (msg == EM_SCROLL)
2458       return 0x00010000 | (((ME_GetYScrollPos(editor) - origNPos)/lineHeight) & 0xffff);
2459     break;
2460   }
2461   case WM_MOUSEWHEEL:
2462   {
2463     int gcWheelDelta;
2464     UINT pulScrollLines;
2465
2466     SystemParametersInfoW(SPI_GETWHEELSCROLLLINES,0, &pulScrollLines, 0);
2467     gcWheelDelta = -GET_WHEEL_DELTA_WPARAM(wParam);
2468
2469     if (abs(gcWheelDelta) >= WHEEL_DELTA && pulScrollLines)
2470     {
2471       /* FIXME follow the original */
2472       ME_ScrollDown(editor,pulScrollLines * (gcWheelDelta / WHEEL_DELTA) * 8);
2473     }
2474     break;
2475   }
2476   case EM_GETRECT:
2477   {
2478     *((RECT *)lParam) = editor->rcFormat;
2479     return 0;
2480   }
2481   case EM_SETRECT:
2482   case EM_SETRECTNP:
2483   {
2484     if (lParam)
2485     {
2486       RECT *rc = (RECT *)lParam;
2487
2488       if (wParam)
2489       {
2490         editor->rcFormat.left += rc->left;
2491         editor->rcFormat.top += rc->top;
2492         editor->rcFormat.right += rc->right;
2493         editor->rcFormat.bottom += rc->bottom;
2494       }
2495       else
2496       {
2497         editor->rcFormat = *rc;
2498       }
2499     }
2500     else
2501     {
2502       GetClientRect(hWnd, &editor->rcFormat);
2503     }
2504     if (msg != EM_SETRECTNP)
2505       ME_RewrapRepaint(editor);
2506     return 0;
2507   }
2508   case EM_REQUESTRESIZE:
2509     ME_SendRequestResize(editor, TRUE);
2510     return 0;
2511   case WM_SETREDRAW:
2512     editor->bRedraw = wParam;
2513     return 0;
2514   case WM_SIZE:
2515   {
2516     GetClientRect(hWnd, &editor->rcFormat);
2517     ME_RewrapRepaint(editor);
2518     return DefWindowProcW(hWnd, msg, wParam, lParam);
2519   }
2520   /* IME messages to make richedit controls IME aware */
2521   case WM_IME_SETCONTEXT:
2522   case WM_IME_CONTROL:
2523   case WM_IME_SELECT:
2524   case WM_IME_COMPOSITIONFULL:
2525     return 0;
2526   case WM_IME_STARTCOMPOSITION:
2527   {
2528     editor->imeStartIndex=ME_GetCursorOfs(editor,0);
2529     ME_DeleteSelection(editor);
2530     ME_CommitUndo(editor);
2531     ME_UpdateRepaint(editor);
2532     return 0;
2533   }
2534   case WM_IME_COMPOSITION:
2535   {
2536     HIMC hIMC;
2537
2538     ME_Style *style = ME_GetInsertStyle(editor, 0);
2539     hIMC = ImmGetContext(hWnd);
2540     ME_DeleteSelection(editor);
2541     ME_CommitUndo(editor);
2542     ME_SaveTempStyle(editor);
2543     if (lParam & GCS_RESULTSTR)
2544     {
2545         LPWSTR lpCompStr = NULL;
2546         DWORD dwBufLen;
2547
2548         dwBufLen = ImmGetCompositionStringW(hIMC, GCS_RESULTSTR, NULL, 0);
2549         lpCompStr = HeapAlloc(GetProcessHeap(),0,dwBufLen + sizeof(WCHAR));
2550         ImmGetCompositionStringW(hIMC, GCS_RESULTSTR, lpCompStr, dwBufLen);
2551         lpCompStr[dwBufLen/sizeof(WCHAR)] = 0;
2552         ME_InsertTextFromCursor(editor,0,lpCompStr,dwBufLen/sizeof(WCHAR),style);
2553     }
2554     else if (lParam & GCS_COMPSTR)
2555     {
2556         LPWSTR lpCompStr = NULL;
2557         DWORD dwBufLen;
2558
2559         dwBufLen = ImmGetCompositionStringW(hIMC, GCS_COMPSTR, NULL, 0);
2560         lpCompStr = HeapAlloc(GetProcessHeap(),0,dwBufLen + sizeof(WCHAR));
2561         ImmGetCompositionStringW(hIMC, GCS_COMPSTR, lpCompStr, dwBufLen);
2562         lpCompStr[dwBufLen/sizeof(WCHAR)] = 0;
2563
2564         ME_InsertTextFromCursor(editor,0,lpCompStr,dwBufLen/sizeof(WCHAR),style);
2565         ME_SetSelection(editor,editor->imeStartIndex,
2566                         editor->imeStartIndex + dwBufLen/sizeof(WCHAR));
2567     }
2568     ME_ReleaseStyle(style);
2569     ME_UpdateRepaint(editor);
2570     return 0;
2571   }
2572   case WM_IME_ENDCOMPOSITION:
2573   {
2574     ME_DeleteSelection(editor);
2575     editor->imeStartIndex=-1;
2576     return 0;
2577   }
2578   case EM_GETOLEINTERFACE:
2579   {
2580     LPVOID *ppvObj = (LPVOID*) lParam;
2581     return CreateIRichEditOle(editor, ppvObj);
2582   }
2583   case EM_GETPASSWORDCHAR:
2584   {
2585     return editor->cPasswordMask;
2586   }
2587   case EM_SETOLECALLBACK:
2588     if(editor->lpOleCallback)
2589       IUnknown_Release(editor->lpOleCallback);
2590     editor->lpOleCallback = (LPRICHEDITOLECALLBACK)lParam;
2591     if(editor->lpOleCallback)
2592       IUnknown_AddRef(editor->lpOleCallback);
2593     return TRUE;
2594   case EM_GETWORDBREAKPROC:
2595     return (LRESULT)editor->pfnWordBreak;
2596   case EM_SETWORDBREAKPROC:
2597   {
2598     EDITWORDBREAKPROCW pfnOld = editor->pfnWordBreak;
2599
2600     editor->pfnWordBreak = (EDITWORDBREAKPROCW)lParam;
2601     return (LRESULT)pfnOld;
2602   }
2603   case EM_SETTEXTMODE:
2604   {
2605     LRESULT ret;
2606     int mask = 0;
2607     int changes = 0;
2608     ret = RichEditWndProc_common(hWnd, WM_GETTEXTLENGTH, 0, 0, unicode);
2609     if (!ret)
2610     {
2611       /*Check for valid wParam*/
2612       if ((((wParam & TM_RICHTEXT) && ((wParam & TM_PLAINTEXT) << 1))) ||
2613           (((wParam & TM_MULTILEVELUNDO) && ((wParam & TM_SINGLELEVELUNDO) << 1))) ||
2614           (((wParam & TM_MULTICODEPAGE) && ((wParam & TM_SINGLECODEPAGE) << 1))))
2615         return 1;
2616       else
2617       {
2618         if (wParam & (TM_RICHTEXT | TM_PLAINTEXT))
2619         {
2620           mask |= (TM_RICHTEXT | TM_PLAINTEXT);
2621           changes |= (wParam & (TM_RICHTEXT | TM_PLAINTEXT));
2622         }
2623         /*FIXME: Currently no support for undo level and code page options*/
2624         editor->mode = (editor->mode & (~mask)) | changes;
2625         return 0;
2626       }
2627     }
2628     return ret;
2629   }
2630   case EM_SETPASSWORDCHAR:
2631   {
2632     editor->cPasswordMask = wParam;
2633     ME_RewrapRepaint(editor);
2634     return 0;
2635   }
2636   default:
2637   do_default:
2638     return DefWindowProcW(hWnd, msg, wParam, lParam);
2639   }
2640   return 0L;
2641 }
2642
2643 static LRESULT WINAPI RichEditWndProcW(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
2644 {
2645     BOOL unicode = TRUE;
2646
2647     /* Under Win9x RichEdit20W returns ANSI strings, see the tests. */
2648     if (msg == WM_GETTEXT && (GetVersion() & 0x80000000))
2649         unicode = FALSE;
2650
2651     return RichEditWndProc_common(hWnd, msg, wParam, lParam, unicode);
2652 }
2653
2654 static LRESULT WINAPI RichEditWndProcA(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
2655 {
2656     return RichEditWndProc_common(hWnd, msg, wParam, lParam, FALSE);
2657 }
2658
2659 /******************************************************************
2660  *        RichEditANSIWndProc (RICHED20.10)
2661  */
2662 LRESULT WINAPI RichEditANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
2663 {
2664     return RichEditWndProcA(hWnd, msg, wParam, lParam);
2665 }
2666
2667 /******************************************************************
2668  *        RichEdit10ANSIWndProc (RICHED20.9)
2669  */
2670 LRESULT WINAPI RichEdit10ANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
2671 {
2672   LRESULT result;
2673
2674   /* FIXME: this is NOT the same as 2.0 version */
2675   result = RichEditANSIWndProc(hWnd, msg, wParam, lParam);
2676   if (msg == WM_NCCREATE)
2677   {
2678     ME_TextEditor *editor = (ME_TextEditor *)GetWindowLongPtrW(hWnd, 0);
2679
2680     editor->bEmulateVersion10 = TRUE;
2681     editor->pBuffer->pLast->member.para.nCharOfs = 2;
2682   }
2683   return result;
2684 }
2685
2686 void ME_SendOldNotify(ME_TextEditor *editor, int nCode)
2687 {
2688   HWND hWnd = editor->hWnd;
2689   SendMessageA(GetParent(hWnd), WM_COMMAND, (nCode<<16)|GetWindowLongW(hWnd, GWLP_ID), (LPARAM)hWnd);
2690 }
2691
2692 void ME_LinkNotify(ME_TextEditor *editor, UINT msg, WPARAM wParam, LPARAM lParam)
2693 {
2694   int x,y;
2695   ME_Cursor tmpCursor;
2696   int nCharOfs; /* The start of the clicked text. Absolute character offset */
2697
2698   ME_Run *tmpRun;
2699
2700   ENLINK info;
2701   x = (short)LOWORD(lParam);
2702   y = (short)HIWORD(lParam);
2703   nCharOfs = ME_CharFromPos(editor, x, y);
2704   if (nCharOfs < 0) return;
2705
2706   ME_CursorFromCharOfs(editor, nCharOfs, &tmpCursor);
2707   tmpRun = &tmpCursor.pRun->member.run;
2708
2709   if ((tmpRun->style->fmt.dwMask & CFM_LINK)
2710     && (tmpRun->style->fmt.dwEffects & CFE_LINK))
2711   { /* The clicked run has CFE_LINK set */
2712     info.nmhdr.hwndFrom = editor->hWnd;
2713     info.nmhdr.idFrom = GetWindowLongW(editor->hWnd, GWLP_ID);
2714     info.nmhdr.code = EN_LINK;
2715     info.msg = msg;
2716     info.wParam = wParam;
2717     info.lParam = lParam;
2718     info.chrg.cpMin = ME_CharOfsFromRunOfs(editor,tmpCursor.pRun,0);
2719     info.chrg.cpMax = info.chrg.cpMin + ME_StrVLen(tmpRun->strText);
2720     SendMessageW(GetParent(editor->hWnd), WM_NOTIFY,info.nmhdr.idFrom, (LPARAM)&info);
2721   }
2722 }
2723
2724 int ME_CountParagraphsBetween(ME_TextEditor *editor, int from, int to)
2725 {
2726   ME_DisplayItem *item = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
2727   int i = 0;
2728
2729   while(item && item->member.para.next_para->member.para.nCharOfs <= from)
2730     item = item->member.para.next_para;
2731   if (!item)
2732     return 0;
2733   while(item && item->member.para.next_para->member.para.nCharOfs <= to) {
2734     item = item->member.para.next_para;
2735     i++;
2736   }
2737   return i;
2738 }
2739
2740
2741 int ME_GetTextW(ME_TextEditor *editor, WCHAR *buffer, int nStart, int nChars, int bCRLF)
2742 {
2743   ME_DisplayItem *item = ME_FindItemAtOffset(editor, diRun, nStart, &nStart);
2744   int nWritten = 0;
2745   WCHAR *pStart = buffer;
2746
2747   if (!item) {
2748     *buffer = 0;
2749     return 0;
2750   }
2751
2752   if (nStart)
2753   {
2754     int nLen = ME_StrLen(item->member.run.strText) - nStart;
2755     if (nLen > nChars)
2756       nLen = nChars;
2757     CopyMemory(buffer, item->member.run.strText->szData + nStart, sizeof(WCHAR)*nLen);
2758     nChars -= nLen;
2759     nWritten += nLen;
2760     if (!nChars)
2761       return nWritten;
2762     buffer += nLen;
2763     nStart = 0;
2764     item = ME_FindItemFwd(item, diRun);
2765   }
2766
2767   while(nChars && item)
2768   {
2769     int nLen = ME_StrLen(item->member.run.strText);
2770     if (nLen > nChars)
2771       nLen = nChars;
2772
2773     if (item->member.run.nFlags & MERF_ENDPARA)
2774     {
2775       if (!ME_FindItemFwd(item, diRun))
2776         /* No '\r' is appended to the last paragraph. */
2777         nLen = 0;
2778       else {
2779         *buffer = '\r';
2780         if (bCRLF)
2781         {
2782           *(++buffer) = '\n';
2783           nWritten++;
2784         }
2785         assert(nLen == 1);
2786         /* our end paragraph consists of 2 characters now */
2787         if (editor->bEmulateVersion10)
2788           nChars--;
2789       }
2790     }
2791     else
2792       CopyMemory(buffer, item->member.run.strText->szData, sizeof(WCHAR)*nLen);
2793     nChars -= nLen;
2794     nWritten += nLen;
2795     buffer += nLen;
2796
2797     if (!nChars)
2798     {
2799       TRACE("nWritten=%d, actual=%d\n", nWritten, buffer-pStart);
2800       *buffer = 0;
2801       return nWritten;
2802     }
2803     item = ME_FindItemFwd(item, diRun);
2804   }
2805   *buffer = 0;
2806   TRACE("nWritten=%d, actual=%d\n", nWritten, buffer-pStart);
2807   return nWritten;
2808 }
2809
2810 static BOOL ME_RegisterEditorClass(HINSTANCE hInstance)
2811 {
2812   WNDCLASSW wcW;
2813   WNDCLASSA wcA;
2814
2815   wcW.style = CS_DBLCLKS | CS_HREDRAW | CS_VREDRAW | CS_GLOBALCLASS;
2816   wcW.lpfnWndProc = RichEditWndProcW;
2817   wcW.cbClsExtra = 0;
2818   wcW.cbWndExtra = sizeof(ME_TextEditor *);
2819   wcW.hInstance = NULL; /* hInstance would register DLL-local class */
2820   wcW.hIcon = NULL;
2821   wcW.hCursor = LoadCursorW(NULL, MAKEINTRESOURCEW(IDC_IBEAM));
2822   wcW.hbrBackground = (HBRUSH)GetStockObject(NULL_BRUSH);
2823   wcW.lpszMenuName = NULL;
2824
2825   if (is_version_nt())
2826   {
2827     wcW.lpszClassName = RichEdit20W;
2828     if (!RegisterClassW(&wcW)) return FALSE;
2829     wcW.lpszClassName = RichEdit50W;
2830     if (!RegisterClassW(&wcW)) return FALSE;
2831   }
2832   else
2833   {
2834     /* WNDCLASSA/W have the same layout */
2835     wcW.lpszClassName = (LPCWSTR)"RichEdit20W";
2836     if (!RegisterClassA((WNDCLASSA *)&wcW)) return FALSE;
2837     wcW.lpszClassName = (LPCWSTR)"RichEdit50W";
2838     if (!RegisterClassA((WNDCLASSA *)&wcW)) return FALSE;
2839   }
2840
2841   wcA.style = CS_DBLCLKS | CS_HREDRAW | CS_VREDRAW | CS_GLOBALCLASS;
2842   wcA.lpfnWndProc = RichEditWndProcA;
2843   wcA.cbClsExtra = 0;
2844   wcA.cbWndExtra = sizeof(ME_TextEditor *);
2845   wcA.hInstance = NULL; /* hInstance would register DLL-local class */
2846   wcA.hIcon = NULL;
2847   wcA.hCursor = LoadCursorW(NULL, MAKEINTRESOURCEW(IDC_IBEAM));
2848   wcA.hbrBackground = (HBRUSH)GetStockObject(NULL_BRUSH);
2849   wcA.lpszMenuName = NULL;
2850   wcA.lpszClassName = "RichEdit20A";
2851   if (!RegisterClassA(&wcA)) return FALSE;
2852   wcA.lpszClassName = "RichEdit50A";
2853   if (!RegisterClassA(&wcA)) return FALSE;
2854
2855   return TRUE;
2856 }
2857
2858 LRESULT WINAPI REComboWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) {
2859   /* FIXME: Not implemented */
2860   TRACE("hWnd %p msg %04x (%s) %08lx %08lx\n",
2861         hWnd, msg, get_msg_name(msg), wParam, lParam);
2862   return DefWindowProcW(hWnd, msg, wParam, lParam);
2863 }
2864
2865 LRESULT WINAPI REListWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) {
2866   /* FIXME: Not implemented */
2867   TRACE("hWnd %p msg %04x (%s) %08lx %08lx\n",
2868         hWnd, msg, get_msg_name(msg), wParam, lParam);
2869   return DefWindowProcW(hWnd, msg, wParam, lParam);
2870 }
2871
2872 /******************************************************************
2873  *        REExtendedRegisterClass (RICHED20.8)
2874  *
2875  * FIXME undocumented
2876  * Need to check for errors and implement controls and callbacks
2877  */
2878 LRESULT WINAPI REExtendedRegisterClass(void)
2879 {
2880   WNDCLASSW wcW;
2881   UINT result;
2882
2883   FIXME("semi stub\n");
2884
2885   wcW.cbClsExtra = 0;
2886   wcW.cbWndExtra = 4;
2887   wcW.hInstance = NULL;
2888   wcW.hIcon = NULL;
2889   wcW.hCursor = NULL;
2890   wcW.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
2891   wcW.lpszMenuName = NULL;
2892
2893   if (!ME_ListBoxRegistered)
2894   {
2895       wcW.style = CS_PARENTDC | CS_DBLCLKS | CS_GLOBALCLASS;
2896       wcW.lpfnWndProc = REListWndProc;
2897       wcW.lpszClassName = REListBox20W;
2898       if (RegisterClassW(&wcW)) ME_ListBoxRegistered = TRUE;
2899   }
2900
2901   if (!ME_ComboBoxRegistered)
2902   {
2903       wcW.style = CS_PARENTDC | CS_DBLCLKS | CS_GLOBALCLASS | CS_VREDRAW | CS_HREDRAW;
2904       wcW.lpfnWndProc = REComboWndProc;
2905       wcW.lpszClassName = REComboBox20W;
2906       if (RegisterClassW(&wcW)) ME_ComboBoxRegistered = TRUE;
2907   }
2908
2909   result = 0;
2910   if (ME_ListBoxRegistered)
2911       result += 1;
2912   if (ME_ComboBoxRegistered)
2913       result += 2;
2914
2915   return result;
2916 }
2917
2918 int ME_AutoURLDetect(ME_TextEditor *editor, WCHAR curChar)
2919 {
2920   struct prefix_s {
2921     const char *text;
2922     int length;
2923   } prefixes[12] = {
2924     {"http:", 5},
2925     {"file:", 6},
2926     {"mailto:", 8},
2927     {"ftp:", 5},
2928     {"https:", 7},
2929     {"gopher:", 8},
2930     {"nntp:", 6},
2931     {"prospero:", 10},
2932     {"telnet:", 8},
2933     {"news:", 6},
2934     {"wais:", 6},
2935     {"www.", 5}
2936   };
2937   CHARRANGE ins_pt;
2938   int curf_ef, link_ef, def_ef;
2939   int cur_prefx, prefx_cnt;
2940   int sel_min, sel_max;
2941   int car_pos = 0;
2942   int text_pos=-1;
2943   int URLmin, URLmax = 0;
2944   CHARRANGE url;
2945   FINDTEXTA ft;
2946   CHARFORMAT2W cur_format;
2947   CHARFORMAT2W default_format;
2948   CHARFORMAT2W link;
2949   RichEditANSIWndProc(editor->hWnd, EM_EXGETSEL, (WPARAM) 0, (LPARAM) &ins_pt);
2950   sel_min = ins_pt.cpMin;
2951   sel_max = ins_pt.cpMax;
2952   if (sel_min==sel_max)
2953     car_pos = sel_min;
2954   if (sel_min!=sel_max)
2955     car_pos = ME_GetTextLength(editor)+1;
2956   cur_format.cbSize = sizeof(cur_format);
2957   default_format.cbSize = sizeof(default_format);
2958   RichEditANSIWndProc(editor->hWnd, EM_GETCHARFORMAT, SCF_SELECTION, (LPARAM) &cur_format);
2959   RichEditANSIWndProc(editor->hWnd, EM_GETCHARFORMAT, SCF_DEFAULT, (LPARAM) &default_format);
2960   link.cbSize = sizeof(link);
2961   link.dwMask = CFM_LINK;
2962   link.dwEffects = CFE_LINK;
2963   curf_ef = cur_format.dwEffects & link.dwEffects;
2964   def_ef = default_format.dwEffects & link.dwEffects;
2965   link_ef = link.dwEffects & link.dwEffects;
2966   if (curf_ef == link_ef)
2967   {
2968     if( curChar == '\n' || curChar=='\r' || curChar==' ')
2969     {
2970       ME_SetSelection(editor, car_pos, car_pos);
2971       RichEditANSIWndProc(editor->hWnd, EM_SETCHARFORMAT, SCF_SELECTION, (LPARAM) &default_format);
2972       text_pos=-1;
2973       return 0;
2974     }
2975   }
2976   if (curf_ef == def_ef)
2977   {
2978     cur_prefx = 0;
2979     prefx_cnt = (sizeof(prefixes)/sizeof(struct prefix_s))-1;
2980     while (cur_prefx<=prefx_cnt)
2981     {
2982       if (text_pos == -1)
2983       {
2984         ft.lpstrText = prefixes[cur_prefx].text;
2985         URLmin=max(0,(car_pos-prefixes[cur_prefx].length));
2986         URLmax=max(0, car_pos);
2987         if ((car_pos == 0) && (ME_GetTextLength(editor) != 0))
2988         {
2989         URLmax = ME_GetTextLength(editor)+1;
2990         }
2991         ft.chrg.cpMin = URLmin;
2992         ft.chrg.cpMax = URLmax;
2993         text_pos=RichEditANSIWndProc(editor->hWnd, EM_FINDTEXT, FR_DOWN, (LPARAM)&ft);
2994         cur_prefx++;
2995       }
2996       if (text_pos != -1)
2997       {
2998         url.cpMin=text_pos;
2999         url.cpMax=car_pos-1;
3000         ME_SetCharFormat(editor, text_pos, (URLmax-text_pos), &link);
3001         ME_RewrapRepaint(editor);
3002         break;
3003       }
3004     }
3005   }
3006   return 0;
3007 }