dlls/riched20/caret.c

   1 /*
   2  * RichEdit - Caret and selection functions.
   3  *
   4  * Copyright 2004 by Krzysztof Foltman
   5  * Copyright 2005 by Phil Krylov
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22
  23 #include "editor.h"
  24
  25 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
  26
  27 static BOOL
  28 ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs);
  29
  30
  31 void ME_GetSelection(ME_TextEditor *editor, int *from, int *to)
  32 {
  33   *from = ME_GetCursorOfs(editor, 0);
  34   *to =   ME_GetCursorOfs(editor, 1);
  35
  36   if (*from > *to)
  37   {
  38     int tmp = *from;
  39     *from = *to;
  40     *to = tmp;
  41   }
  42 }
  43
  44 int ME_GetTextLength(ME_TextEditor *editor)
  45 {
  46   return ME_CharOfsFromRunOfs(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun), 0);
  47 }
  48
  49
  50 int ME_GetTextLengthEx(ME_TextEditor *editor, GETTEXTLENGTHEX *how)
  51 {
  52   int length;
  53
  54   if (how->flags & GTL_PRECISE && how->flags & GTL_CLOSE)
  55     return E_INVALIDARG;
  56   if (how->flags & GTL_NUMCHARS && how->flags & GTL_NUMBYTES)
  57     return E_INVALIDARG;
  58
  59   length = ME_GetTextLength(editor);
  60
  61   if (how->flags & GTL_USECRLF)
  62     length += editor->nParagraphs;
  63
  64   if (how->flags & GTL_NUMBYTES)
  65   {
  66     CPINFO cpinfo;
  67
  68     if (how->codepage == 1200)
  69       return length * 2;
  70     if (how->flags & GTL_PRECISE)
  71       FIXME("GTL_PRECISE flag unsupported. Using GTL_CLOSE\n");
  72     if (GetCPInfo(how->codepage, &cpinfo))
  73       return length * cpinfo.MaxCharSize;
  74     ERR("Invalid codepage %u\n", how->codepage);
  75     return E_INVALIDARG;
  76   }
  77   return length;
  78 }
  79
  80
  81 int ME_SetSelection(ME_TextEditor *editor, int from, int to)
  82 {
  83   int selectionEnd = 0;
  84   const int len = ME_GetTextLength(editor);
  85
  86   /* all negative values are effectively the same */
  87   if (from < 0)
  88     from = -1;
  89   if (to < 0)
  90     to = -1;
  91
  92   /* select all */
  93   if (from == 0 && to == -1)
  94   {
  95     editor->pCursors[1].pRun = ME_FindItemFwd(editor->pBuffer->pFirst, diRun);
  96     editor->pCursors[1].nOffset = 0;
  97     editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
  98     editor->pCursors[0].nOffset = 0;
  99     ME_InvalidateSelection(editor);
 100     ME_ClearTempStyle(editor);
 101     return len + 1;
 102   }
 103
 104   /* if both values are equal and also out of bound, that means to */
 105   /* put the selection at the end of the text */
 106   if ((from == to) && (to < 0 || to > len))
 107   {
 108     selectionEnd = 1;
 109   }
 110   else
 111   {
 112     /* if from is negative and to is positive then selection is */
 113     /* deselected and caret moved to end of the current selection */
 114     if (from < 0)
 115     {
 116       int start, end;
 117       ME_GetSelection(editor, &start, &end);
 118       editor->pCursors[1] = editor->pCursors[0];
 119       ME_Repaint(editor);
 120       ME_ClearTempStyle(editor);
 121       return end;
 122     }
 123
 124     /* adjust to if it's a negative value */
 125     if (to < 0)
 126       to = len + 1;
 127
 128     /* flip from and to if they are reversed */
 129     if (from>to)
 130     {
 131       int tmp = from;
 132       from = to;
 133       to = tmp;
 134     }
 135
 136     /* after fiddling with the values, we find from > len && to > len */
 137     if (from > len)
 138       selectionEnd = 1;
 139     /* special case with to too big */
 140     else if (to > len)
 141       to = len + 1;
 142   }
 143
 144   if (selectionEnd)
 145   {
 146     editor->pCursors[1].pRun = editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
 147     editor->pCursors[1].nOffset = editor->pCursors[0].nOffset = 0;
 148     ME_InvalidateSelection(editor);
 149     ME_ClearTempStyle(editor);
 150     return len;
 151   }
 152
 153   ME_RunOfsFromCharOfs(editor, from, &editor->pCursors[1].pRun, &editor->pCursors[1].nOffset);
 154   ME_RunOfsFromCharOfs(editor, to, &editor->pCursors[0].pRun, &editor->pCursors[0].nOffset);
 155   return to;
 156 }
 157
 158
 159 void
 160 ME_GetCursorCoordinates(ME_TextEditor *editor, ME_Cursor *pCursor,
 161                         int *x, int *y, int *height)
 162 {
 163   ME_DisplayItem *pCursorRun = pCursor->pRun;
 164   ME_DisplayItem *pSizeRun = pCursor->pRun;
 165
 166   assert(!pCursor->nOffset || !editor->bCaretAtEnd);
 167   assert(height && x && y);
 168   assert(!(ME_GetParagraph(pCursorRun)->member.para.nFlags & MEPF_REWRAP));
 169   assert(pCursor->pRun);
 170   assert(pCursor->pRun->type == diRun);
 171
 172   if (pCursorRun->type == diRun) {
 173     ME_DisplayItem *row = ME_FindItemBack(pCursorRun, diStartRowOrParagraph);
 174
 175     if (row) {
 176       HDC hDC = GetDC(editor->hWnd);
 177       ME_Context c;
 178       ME_DisplayItem *run = pCursorRun;
 179       ME_DisplayItem *para = NULL;
 180       SIZE sz = {0, 0};
 181
 182       ME_InitContext(&c, editor, hDC);
 183
 184       if (!pCursor->nOffset && !editor->bCaretAtEnd)
 185       {
 186         ME_DisplayItem *prev = ME_FindItemBack(pCursorRun, diRunOrStartRow);
 187         assert(prev);
 188         if (prev->type == diRun)
 189           pSizeRun = prev;
 190       }
 191       assert(row->type == diStartRow); /* paragraph -> run without start row ?*/
 192       para = ME_FindItemBack(row, diParagraph);
 193       assert(para);
 194       assert(para->type == diParagraph);
 195       if (editor->bCaretAtEnd && !pCursor->nOffset &&
 196           run == ME_FindItemFwd(row, diRun))
 197       {
 198         ME_DisplayItem *tmp = ME_FindItemBack(row, diRunOrParagraph);
 199         assert(tmp);
 200         if (tmp->type == diRun)
 201         {
 202           row = ME_FindItemBack(tmp, diStartRow);
 203           pSizeRun = run = tmp;
 204           assert(run);
 205           assert(run->type == diRun);
 206           sz = ME_GetRunSize(&c, &para->member.para, &run->member.run, ME_StrLen(run->member.run.strText));
 207         }
 208       }
 209       if (pCursor->nOffset && !(run->member.run.nFlags & MERF_SKIPPED)) {
 210         sz = ME_GetRunSize(&c, &para->member.para, &run->member.run, pCursor->nOffset);
 211       }
 212
 213       *height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent;
 214       *x = run->member.run.pt.x + sz.cx;
 215       *y = para->member.para.nYPos + row->member.row.nBaseline + pSizeRun->member.run.pt.y - pSizeRun->member.run.nAscent - ME_GetYScrollPos(editor);
 216
 217       ME_DestroyContext(&c);
 218       ReleaseDC(editor->hWnd, hDC);
 219       return;
 220     }
 221   }
 222   *height = 10; /* FIXME use global font */
 223   *x = 0;
 224   *y = 0;
 225 }
 226
 227
 228 void
 229 ME_MoveCaret(ME_TextEditor *editor)
 230 {
 231   int x, y, height;
 232
 233   ME_WrapMarkedParagraphs(editor);
 234   ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
 235   if(editor->bHaveFocus)
 236   {
 237     CreateCaret(editor->hWnd, NULL, 0, height);
 238     SetCaretPos(x, y);
 239   }
 240 }
 241
 242
 243 void ME_ShowCaret(ME_TextEditor *ed)
 244 {
 245   ME_MoveCaret(ed);
 246   if(ed->bHaveFocus)
 247     ShowCaret(ed->hWnd);
 248 }
 249
 250 void ME_HideCaret(ME_TextEditor *ed)
 251 {
 252   if(ed->bHaveFocus)
 253   {
 254     HideCaret(ed->hWnd);
 255     DestroyCaret();
 256   }
 257 }
 258
 259 void ME_InternalDeleteText(ME_TextEditor *editor, int nOfs,
 260   int nChars)
 261 {
 262   ME_Cursor c;
 263   int shift = 0;
 264
 265   while(nChars > 0)
 266   {
 267     ME_Run *run;
 268     ME_CursorFromCharOfs(editor, nOfs, &c);
 269     run = &c.pRun->member.run;
 270     if (run->nFlags & MERF_ENDPARA) {
 271       if (!ME_FindItemFwd(c.pRun, diParagraph))
 272       {
 273         return;
 274       }
 275       ME_JoinParagraphs(editor, ME_GetParagraph(c.pRun));
 276       /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
 277       ME_CheckCharOffsets(editor);
 278       nChars--;
 279       if (editor->bEmulateVersion10 && nChars)
 280         nChars--;
 281       continue;
 282     }
 283     else
 284     {
 285       ME_Cursor cursor;
 286       int nIntendedChars = nChars;
 287       int nCharsToDelete = nChars;
 288       int i;
 289       int loc = c.nOffset;
 290
 291       ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP;
 292
 293       cursor = c;
 294       ME_StrRelPos(run->strText, loc, &nChars);
 295       /* nChars is the number of characters that should be deleted from the
 296          FOLLOWING runs (these AFTER cursor.pRun)
 297          nCharsToDelete is a number of chars to delete from THIS run */
 298       nCharsToDelete -= nChars;
 299       shift -= nCharsToDelete;
 300       TRACE("Deleting %d (intended %d-remaning %d) chars at %d in '%s' (%d)\n",
 301         nCharsToDelete, nIntendedChars, nChars, c.nOffset,
 302         debugstr_w(run->strText->szData), run->strText->nLen);
 303
 304       if (!c.nOffset && ME_StrVLen(run->strText) == nCharsToDelete)
 305       {
 306         /* undo = reinsert whole run */
 307         /* nOfs is a character offset (from the start of the document
 308            to the current (deleted) run */
 309         ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
 310         if (pUndo)
 311           pUndo->di.member.run.nCharOfs = nOfs;
 312       }
 313       else
 314       {
 315         /* undo = reinsert partial run */
 316         ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
 317         if (pUndo) {
 318           ME_DestroyString(pUndo->di.member.run.strText);
 319           pUndo->di.member.run.nCharOfs = nOfs;
 320           pUndo->di.member.run.strText = ME_MakeStringN(run->strText->szData+c.nOffset, nCharsToDelete);
 321         }
 322       }
 323       TRACE("Post deletion string: %s (%d)\n", debugstr_w(run->strText->szData), run->strText->nLen);
 324       TRACE("Shift value: %d\n", shift);
 325       ME_StrDeleteV(run->strText, c.nOffset, nCharsToDelete);
 326
 327       /* update cursors (including c) */
 328       for (i=-1; i<editor->nCursors; i++) {
 329         ME_Cursor *pThisCur = editor->pCursors + i;
 330         if (i == -1) pThisCur = &c;
 331         if (pThisCur->pRun == cursor.pRun) {
 332           if (pThisCur->nOffset > cursor.nOffset) {
 333             if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete)
 334               pThisCur->nOffset = cursor.nOffset;
 335             else
 336               pThisCur->nOffset -= nCharsToDelete;
 337             assert(pThisCur->nOffset >= 0);
 338             assert(pThisCur->nOffset <= ME_StrVLen(run->strText));
 339           }
 340           if (pThisCur->nOffset == ME_StrVLen(run->strText))
 341           {
 342             pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
 343             assert(pThisCur->pRun->type == diRun);
 344             pThisCur->nOffset = 0;
 345           }
 346         }
 347       }
 348
 349       /* c = updated data now */
 350
 351       if (c.pRun == cursor.pRun)
 352         ME_SkipAndPropagateCharOffset(c.pRun, shift);
 353       else
 354         ME_PropagateCharOffset(c.pRun, shift);
 355
 356       if (!ME_StrVLen(cursor.pRun->member.run.strText))
 357       {
 358         TRACE("Removing useless run\n");
 359         ME_Remove(cursor.pRun);
 360         ME_DestroyDisplayItem(cursor.pRun);
 361       }
 362
 363       shift = 0;
 364       /*
 365       ME_CheckCharOffsets(editor);
 366       */
 367       continue;
 368     }
 369   }
 370 }
 371
 372 void ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor,
 373   int nChars)
 374 {
 375   assert(nCursor>=0 && nCursor<editor->nCursors);
 376   /* text operations set modified state */
 377   editor->nModifyStep = 1;
 378   ME_InternalDeleteText(editor, ME_GetCursorOfs(editor, nCursor), nChars);
 379 }
 380
 381 static ME_DisplayItem *
 382 ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor,
 383                                 const WCHAR *str, int len, ME_Style *style,
 384                                 int flags)
 385 {
 386   ME_Cursor *p = &editor->pCursors[nCursor];
 387
 388   editor->bCaretAtEnd = FALSE;
 389
 390   assert(p->pRun->type == diRun);
 391
 392   return ME_InsertRunAtCursor(editor, p, style, str, len, flags);
 393 }
 394
 395
 396 /* FIXME this is temporary, just to have something to test how bad graphics handler is */
 397 void ME_InsertGraphicsFromCursor(ME_TextEditor *editor, int nCursor)
 398 {
 399   ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
 400   WCHAR space = ' ';
 401
 402   /* FIXME no no no */
 403   if (ME_IsSelection(editor))
 404     ME_DeleteSelection(editor);
 405
 406   ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
 407                                   MERF_GRAPHICS);
 408   ME_SendSelChange(editor);
 409 }
 410
 411
 412 void
 413 ME_InsertTableCellFromCursor(ME_TextEditor *editor, int nCursor)
 414 {
 415   WCHAR tab = '\t';
 416   ME_DisplayItem *p, *run;
 417   ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
 418
 419   p = ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, pStyle,
 420                                       MERF_CELL);
 421   run = p;
 422   while ((run = ME_FindItemBack(run, diRunOrParagraph))->type == diRun)
 423   {
 424     if (run->member.run.nFlags & MERF_CELL)
 425     {
 426       assert(run->member.run.pCell->next);
 427       p->member.run.pCell = run->member.run.pCell->next;
 428       return;
 429     }
 430   }
 431   assert(run->type == diParagraph);
 432   assert(run->member.para.bTable);
 433   assert(run->member.para.pCells);
 434   p->member.run.pCell = run->member.para.pCells;
 435 }
 436
 437
 438 void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
 439   const WCHAR *str, int len, ME_Style *style)
 440 {
 441   const WCHAR *pos;
 442   ME_Cursor *p = NULL;
 443   int freeSpace;
 444
 445   /* FIXME really HERE ? */
 446   if (ME_IsSelection(editor))
 447     ME_DeleteSelection(editor);
 448
 449   /* FIXME: is this too slow? */
 450   /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */
 451   freeSpace = editor->nTextLimit - ME_GetTextLength(editor);
 452
 453   /* text operations set modified state */
 454   editor->nModifyStep = 1;
 455
 456   assert(style);
 457
 458   assert(nCursor>=0 && nCursor<editor->nCursors);
 459   if (len == -1)
 460     len = lstrlenW(str);
 461   len = min(len, freeSpace);
 462   while (len)
 463   {
 464     pos = str;
 465     /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
 466     while(pos-str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
 467       pos++;
 468     if (pos-str < len && *pos == '\t') { /* handle tabs */
 469       WCHAR tab = '\t';
 470
 471       if (pos!=str)
 472         ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
 473
 474       ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
 475
 476       pos++;
 477       if(pos-str <= len) {
 478         len -= pos - str;
 479         str = pos;
 480         continue;
 481       }
 482     }
 483     if (pos-str < len) {   /* handle EOLs */
 484       ME_DisplayItem *tp, *end_run;
 485       ME_Style *tmp_style;
 486       if (pos!=str)
 487         ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
 488       p = &editor->pCursors[nCursor];
 489       if (p->nOffset) {
 490         ME_SplitRunSimple(editor, p->pRun, p->nOffset);
 491         p = &editor->pCursors[nCursor];
 492       }
 493       tmp_style = ME_GetInsertStyle(editor, nCursor);
 494       /* ME_SplitParagraph increases style refcount */
 495       tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style);
 496       p->pRun = ME_FindItemFwd(tp, diRun);
 497       end_run = ME_FindItemBack(tp, diRun);
 498       ME_ReleaseStyle(end_run->member.run.style);
 499       end_run->member.run.style = tmp_style;
 500       p->nOffset = 0;
 501       if(pos-str < len && *pos =='\r')
 502         pos++;
 503       if(pos-str < len && *pos =='\n')
 504         pos++;
 505       if(pos-str <= len) {
 506         len -= pos - str;
 507         str = pos;
 508         continue;
 509       }
 510     }
 511     ME_InternalInsertTextFromCursor(editor, nCursor, str, len, style, 0);
 512     len = 0;
 513   }
 514 }
 515
 516
 517 static BOOL
 518 ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
 519 {
 520   ME_DisplayItem *pRun = pCursor->pRun;
 521
 522   if (nRelOfs == -1)
 523   {
 524     if (!pCursor->nOffset)
 525     {
 526       do {
 527         pRun = ME_FindItemBack(pRun, diRunOrParagraph);
 528         assert(pRun);
 529         switch (pRun->type)
 530         {
 531           case diRun:
 532             break;
 533           case diParagraph:
 534             if (pRun->member.para.prev_para->type == diTextStart)
 535               return FALSE;
 536             pRun = ME_FindItemBack(pRun, diRunOrParagraph);
 537             /* every paragraph ought to have at least one run */
 538             assert(pRun && pRun->type == diRun);
 539             assert(pRun->member.run.nFlags & MERF_ENDPARA);
 540             break;
 541           default:
 542             assert(pRun->type != diRun && pRun->type != diParagraph);
 543             return FALSE;
 544         }
 545       } while (RUN_IS_HIDDEN(&pRun->member.run));
 546       pCursor->pRun = pRun;
 547       if (pRun->member.run.nFlags & MERF_ENDPARA)
 548         pCursor->nOffset = 0;
 549       else
 550         pCursor->nOffset = pRun->member.run.strText->nLen;
 551     }
 552
 553     if (pCursor->nOffset)
 554       pCursor->nOffset = ME_StrRelPos2(pCursor->pRun->member.run.strText, pCursor->nOffset, nRelOfs);
 555     return TRUE;
 556   }
 557   else
 558   {
 559     if (!(pRun->member.run.nFlags & MERF_ENDPARA))
 560     {
 561       int new_ofs = ME_StrRelPos2(pRun->member.run.strText, pCursor->nOffset, nRelOfs);
 562
 563       if (new_ofs < pRun->member.run.strText->nLen)
 564       {
 565         pCursor->nOffset = new_ofs;
 566         return TRUE;
 567       }
 568     }
 569     do {
 570       pRun = ME_FindItemFwd(pRun, diRun);
 571     } while (pRun && RUN_IS_HIDDEN(&pRun->member.run));
 572     if (pRun)
 573     {
 574       pCursor->pRun = pRun;
 575       pCursor->nOffset = 0;
 576       return TRUE;
 577     }
 578   }
 579   return FALSE;
 580 }
 581
 582
 583 static BOOL
 584 ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
 585 {
 586   ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
 587   int nOffset = cursor->nOffset;
 588
 589   if (nRelOfs == -1)
 590   {
 591     /* Backward movement */
 592     while (TRUE)
 593     {
 594       nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
 595                                      nOffset, WB_MOVEWORDLEFT);
 596        if (nOffset)
 597         break;
 598       pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
 599       if (pOtherRun->type == diRun)
 600       {
 601         if (ME_CallWordBreakProc(editor, pOtherRun->member.run.strText,
 602                                  pOtherRun->member.run.strText->nLen - 1,
 603                                  WB_ISDELIMITER)
 604             && !(pRun->member.run.nFlags & MERF_ENDPARA)
 605             && !(cursor->pRun == pRun && cursor->nOffset == 0)
 606             && !ME_CallWordBreakProc(editor, pRun->member.run.strText, 0,
 607                                      WB_ISDELIMITER))
 608           break;
 609         pRun = pOtherRun;
 610         nOffset = pOtherRun->member.run.strText->nLen;
 611       }
 612       else if (pOtherRun->type == diParagraph)
 613       {
 614         if (cursor->pRun == pRun && cursor->nOffset == 0)
 615         {
 616           /* Paragraph breaks are treated as separate words */
 617           if (pOtherRun->member.para.prev_para->type == diTextStart)
 618             return FALSE;
 619           pRun = ME_FindItemBack(pOtherRun, diRunOrParagraph);
 620         }
 621         break;
 622       }
 623     }
 624   }
 625   else
 626   {
 627     /* Forward movement */
 628     BOOL last_delim = FALSE;
 629
 630     while (TRUE)
 631     {
 632       if (last_delim && !ME_CallWordBreakProc(editor, pRun->member.run.strText,
 633                                               nOffset, WB_ISDELIMITER))
 634         break;
 635       nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
 636                                      nOffset, WB_MOVEWORDRIGHT);
 637       if (nOffset < pRun->member.run.strText->nLen)
 638         break;
 639       pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
 640       if (pOtherRun->type == diRun)
 641       {
 642         last_delim = ME_CallWordBreakProc(editor, pRun->member.run.strText,
 643                                           nOffset - 1, WB_ISDELIMITER);
 644         pRun = pOtherRun;
 645         nOffset = 0;
 646       }
 647       else if (pOtherRun->type == diParagraph)
 648       {
 649         if (cursor->pRun == pRun)
 650           pRun = ME_FindItemFwd(pOtherRun, diRun);
 651         nOffset = 0;
 652         break;
 653       }
 654       else /* diTextEnd */
 655       {
 656         if (cursor->pRun == pRun)
 657           return FALSE;
 658         nOffset = 0;
 659         break;
 660       }
 661     }
 662   }
 663   cursor->pRun = pRun;
 664   cursor->nOffset = nOffset;
 665   return TRUE;
 666 }
 667
 668
 669 void
 670 ME_SelectWord(ME_TextEditor *editor)
 671 {
 672   if (!(editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA))
 673     ME_MoveCursorWords(editor, &editor->pCursors[0], -1);
 674   ME_MoveCursorWords(editor, &editor->pCursors[1], +1);
 675   ME_InvalidateSelection(editor);
 676   ME_SendSelChange(editor);
 677 }
 678
 679
 680 int ME_GetCursorOfs(ME_TextEditor *editor, int nCursor)
 681 {
 682   ME_Cursor *pCursor = &editor->pCursors[nCursor];
 683
 684   return ME_GetParagraph(pCursor->pRun)->member.para.nCharOfs
 685     + pCursor->pRun->member.run.nCharOfs + pCursor->nOffset;
 686 }
 687
 688 int ME_FindPixelPos(ME_TextEditor *editor, int x, int y, ME_Cursor *result, BOOL *is_eol)
 689 {
 690   ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
 691   int rx = 0;
 692
 693   if (is_eol)
 694     *is_eol = 0;
 695
 696   while(p != editor->pBuffer->pLast)
 697   {
 698     if (p->type == diParagraph)
 699     {
 700       int ry = y - p->member.para.nYPos;
 701       if (ry < 0)
 702       {
 703         result->pRun = ME_FindItemFwd(p, diRun);
 704         result->nOffset = 0;
 705         return 0;
 706       }
 707       if (ry >= p->member.para.nHeight)
 708       {
 709         p = p->member.para.next_para;
 710         continue;
 711       }
 712       p = ME_FindItemFwd(p, diStartRow);
 713       y = ry;
 714       continue;
 715     }
 716     if (p->type == diStartRow)
 717     {
 718       int ry = y - p->member.row.nYPos;
 719       if (ry < 0)
 720         return 0;
 721       if (ry >= p->member.row.nHeight)
 722       {
 723         p = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
 724         if (p->type != diStartRow)
 725           return 0;
 726         continue;
 727       }
 728       p = ME_FindItemFwd(p, diRun);
 729       continue;
 730     }
 731     if (p->type == diRun)
 732     {
 733       ME_DisplayItem *pp;
 734       rx = x - p->member.run.pt.x;
 735       if (rx < 0)
 736         rx = 0;
 737       if (rx >= p->member.run.nWidth) /* not this run yet... find next item */
 738       {
 739         pp = p;
 740         do {
 741           p = p->next;
 742           if (p->type == diRun)
 743           {
 744             rx = x - p->member.run.pt.x;
 745             goto continue_search;
 746           }
 747           if (p->type == diStartRow)
 748           {
 749             p = ME_FindItemFwd(p, diRun);
 750             if (is_eol)
 751               *is_eol = 1;
 752             rx = 0; /* FIXME not sure */
 753             goto found_here;
 754           }
 755           if (p->type == diParagraph || p->type == diTextEnd)
 756           {
 757             rx = 0; /* FIXME not sure */
 758             p = pp;
 759             goto found_here;
 760           }
 761         } while(1);
 762         continue;
 763       }
 764     found_here:
 765       if (p->member.run.nFlags & MERF_ENDPARA)
 766         rx = 0;
 767       result->pRun = p;
 768       result->nOffset = ME_CharFromPointCursor(editor, rx, &p->member.run);
 769       if (editor->pCursors[0].nOffset == p->member.run.strText->nLen && rx)
 770       {
 771         result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
 772         result->nOffset = 0;
 773       }
 774       return 1;
 775     }
 776     assert(0);
 777   continue_search:
 778     ;
 779   }
 780   result->pRun = ME_FindItemBack(p, diRun);
 781   result->nOffset = 0;
 782   assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
 783   return 0;
 784 }
 785
 786
 787 int
 788 ME_CharFromPos(ME_TextEditor *editor, int x, int y)
 789 {
 790   ME_Cursor cursor;
 791   RECT rc;
 792
 793   GetClientRect(editor->hWnd, &rc);
 794   if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom)
 795     return -1;
 796   y += ME_GetYScrollPos(editor);
 797   ME_FindPixelPos(editor, x, y, &cursor, NULL);
 798   return (ME_GetParagraph(cursor.pRun)->member.para.nCharOfs
 799           + cursor.pRun->member.run.nCharOfs + cursor.nOffset);
 800 }
 801
 802
 803 void ME_LButtonDown(ME_TextEditor *editor, int x, int y)
 804 {
 805   ME_Cursor tmp_cursor;
 806   int is_selection = 0;
 807
 808   editor->nUDArrowX = -1;
 809
 810   y += ME_GetYScrollPos(editor);
 811
 812   tmp_cursor = editor->pCursors[0];
 813   is_selection = ME_IsSelection(editor);
 814
 815   ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
 816
 817   if (GetKeyState(VK_SHIFT)>=0)
 818   {
 819     editor->pCursors[1] = editor->pCursors[0];
 820   }
 821   else
 822   {
 823     if (!is_selection) {
 824       editor->pCursors[1] = tmp_cursor;
 825       is_selection = 1;
 826     }
 827   }
 828   ME_InvalidateSelection(editor);
 829   HideCaret(editor->hWnd);
 830   ME_MoveCaret(editor);
 831   ShowCaret(editor->hWnd);
 832   ME_ClearTempStyle(editor);
 833   ME_SendSelChange(editor);
 834 }
 835
 836 void ME_MouseMove(ME_TextEditor *editor, int x, int y)
 837 {
 838   ME_Cursor tmp_cursor;
 839
 840   y += ME_GetYScrollPos(editor);
 841
 842   tmp_cursor = editor->pCursors[0];
 843   /* FIXME: do something with the return value of ME_FindPixelPos */
 844   ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd);
 845
 846   if (tmp_cursor.pRun == editor->pCursors[0].pRun &&
 847       tmp_cursor.nOffset == editor->pCursors[0].nOffset)
 848     return;
 849
 850   ME_InvalidateSelection(editor);
 851   editor->pCursors[0] = tmp_cursor;
 852   HideCaret(editor->hWnd);
 853   ME_MoveCaret(editor);
 854   ME_InvalidateSelection(editor);
 855   ShowCaret(editor->hWnd);
 856   ME_SendSelChange(editor);
 857 }
 858
 859 static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
 860                                 int x, int *pOffset, int *pbCaretAtEnd)
 861 {
 862   ME_DisplayItem *pNext, *pLastRun;
 863   pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
 864   assert(pNext->type == diRun);
 865   pLastRun = pNext;
 866   *pbCaretAtEnd = FALSE;
 867   do {
 868     int run_x = pNext->member.run.pt.x;
 869     int width = pNext->member.run.nWidth;
 870     if (x < run_x)
 871     {
 872       if (pOffset) *pOffset = 0;
 873       return pNext;
 874     }
 875     if (x >= run_x && x < run_x+width)
 876     {
 877       int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
 878       ME_String *s = pNext->member.run.strText;
 879       if (ch < s->nLen) {
 880         if (pOffset)
 881           *pOffset = ch;
 882         return pNext;
 883       }
 884     }
 885     pLastRun = pNext;
 886     pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
 887   } while(pNext && pNext->type == diRun);
 888
 889   if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
 890   {
 891     pNext = ME_FindItemFwd(pNext, diRun);
 892     if (pbCaretAtEnd) *pbCaretAtEnd = 1;
 893     if (pOffset) *pOffset = 0;
 894     return pNext;
 895   } else {
 896     if (pbCaretAtEnd) *pbCaretAtEnd = 0;
 897     if (pOffset) *pOffset = 0;
 898     return pLastRun;
 899   }
 900 }
 901
 902 static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
 903 {
 904   ME_DisplayItem *pRun = pCursor->pRun;
 905   int x;
 906
 907   if (editor->nUDArrowX != -1)
 908     x = editor->nUDArrowX;
 909   else {
 910     if (editor->bCaretAtEnd)
 911     {
 912       pRun = ME_FindItemBack(pRun, diRun);
 913       assert(pRun);
 914       x = pRun->member.run.pt.x + pRun->member.run.nWidth;
 915     }
 916     else {
 917       x = pRun->member.run.pt.x;
 918       x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
 919     }
 920     editor->nUDArrowX = x;
 921   }
 922   return x;
 923 }
 924
 925
 926 static void
 927 ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
 928 {
 929   ME_DisplayItem *pRun = pCursor->pRun;
 930   ME_DisplayItem *pItem;
 931   int x = ME_GetXForArrow(editor, pCursor);
 932
 933   if (editor->bCaretAtEnd && !pCursor->nOffset)
 934     pRun = ME_FindItemBack(pRun, diRun);
 935   if (!pRun)
 936     return;
 937   if (nRelOfs == -1)
 938   {
 939     /* start of this row */
 940     pItem = ME_FindItemBack(pRun, diStartRow);
 941     assert(pItem);
 942     /* start of the previous row */
 943     pItem = ME_FindItemBack(pItem, diStartRow);
 944   }
 945   else
 946   {
 947     /* start of the next row */
 948     pItem = ME_FindItemFwd(pRun, diStartRow);
 949     /* FIXME If diParagraph is before diStartRow, wrap the next paragraph?
 950     */
 951   }
 952   if (!pItem)
 953   {
 954     /* row not found - ignore */
 955     return;
 956   }
 957   pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
 958   assert(pCursor->pRun);
 959   assert(pCursor->pRun->type == diRun);
 960 }
 961
 962
 963 static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
 964 {
 965   ME_DisplayItem *pRun = pCursor->pRun;
 966   ME_DisplayItem *pLast, *p;
 967   int x, y, ys, yd, yp, yprev;
 968   ME_Cursor tmp_curs = *pCursor;
 969
 970   x = ME_GetXForArrow(editor, pCursor);
 971   if (!pCursor->nOffset && editor->bCaretAtEnd)
 972     pRun = ME_FindItemBack(pRun, diRun);
 973
 974   p = ME_FindItemBack(pRun, diStartRowOrParagraph);
 975   assert(p->type == diStartRow);
 976   yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
 977   yprev = ys = y = yp + p->member.row.nYPos;
 978   yd = y - editor->sizeWindow.cy;
 979   pLast = p;
 980
 981   do {
 982     p = ME_FindItemBack(p, diStartRowOrParagraph);
 983     if (!p)
 984       break;
 985     if (p->type == diParagraph) { /* crossing paragraphs */
 986       if (p->member.para.prev_para == NULL)
 987         break;
 988       yp = p->member.para.prev_para->member.para.nYPos;
 989       continue;
 990     }
 991     y = yp + p->member.row.nYPos;
 992     if (y < yd)
 993       break;
 994     pLast = p;
 995     yprev = y;
 996   } while(1);
 997
 998   pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
 999   ME_UpdateSelection(editor, &tmp_curs);
1000   if (yprev < editor->sizeWindow.cy)
1001   {
1002     ME_EnsureVisible(editor, ME_FindItemFwd(editor->pBuffer->pFirst, diRun));
1003     ME_Repaint(editor);
1004   }
1005   else
1006   {
1007     ME_ScrollUp(editor, ys-yprev);
1008   }
1009   assert(pCursor->pRun);
1010   assert(pCursor->pRun->type == diRun);
1011 }
1012
1013 /* FIXME: in the original RICHEDIT, PageDown always scrolls by the same amount
1014    of pixels, even if it makes the scroll bar position exceed its normal maximum.
1015    In such a situation, clicking the scrollbar restores its position back to the
1016    normal range (ie. sets it to (doclength-screenheight)). */
1017
1018 static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
1019 {
1020   ME_DisplayItem *pRun = pCursor->pRun;
1021   ME_DisplayItem *pLast, *p;
1022   int x, y, ys, yd, yp, yprev;
1023   ME_Cursor tmp_curs = *pCursor;
1024
1025   x = ME_GetXForArrow(editor, pCursor);
1026   if (!pCursor->nOffset && editor->bCaretAtEnd)
1027     pRun = ME_FindItemBack(pRun, diRun);
1028
1029   p = ME_FindItemBack(pRun, diStartRowOrParagraph);
1030   assert(p->type == diStartRow);
1031   yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
1032   yprev = ys = y = yp + p->member.row.nYPos;
1033   yd = y + editor->sizeWindow.cy;
1034   pLast = p;
1035
1036   do {
1037     p = ME_FindItemFwd(p, diStartRowOrParagraph);
1038     if (!p)
1039       break;
1040     if (p->type == diParagraph) {
1041       yp = p->member.para.nYPos;
1042       continue;
1043     }
1044     y = yp + p->member.row.nYPos;
1045     if (y >= yd)
1046       break;
1047     pLast = p;
1048     yprev = y;
1049   } while(1);
1050
1051   pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
1052   ME_UpdateSelection(editor, &tmp_curs);
1053   if (yprev >= editor->nTotalLength-editor->sizeWindow.cy)
1054   {
1055     ME_EnsureVisible(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun));
1056     ME_Repaint(editor);
1057   }
1058   else
1059   {
1060     ME_ScrollUp(editor,ys-yprev);
1061   }
1062   assert(pCursor->pRun);
1063   assert(pCursor->pRun->type == diRun);
1064 }
1065
1066 static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1067 {
1068   ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
1069   /* bCaretAtEnd doesn't make sense if the cursor isn't set at the
1070   first character of the next row */
1071   assert(!editor->bCaretAtEnd || !pCursor->nOffset);
1072   ME_WrapMarkedParagraphs(editor);
1073   if (pRow) {
1074     ME_DisplayItem *pRun;
1075     if (editor->bCaretAtEnd && !pCursor->nOffset) {
1076       pRow = ME_FindItemBack(pRow, diStartRow);
1077       if (!pRow)
1078         return;
1079     }
1080     pRun = ME_FindItemFwd(pRow, diRun);
1081     if (pRun) {
1082       pCursor->pRun = pRun;
1083       pCursor->nOffset = 0;
1084     }
1085   }
1086   editor->bCaretAtEnd = FALSE;
1087 }
1088
1089 static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
1090 {
1091   ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diTextStart);
1092   if (pRow) {
1093     ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1094     if (pRun) {
1095       pCursor->pRun = pRun;
1096       pCursor->nOffset = 0;
1097     }
1098   }
1099 }
1100
1101 static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1102 {
1103   ME_DisplayItem *pRow;
1104
1105   if (editor->bCaretAtEnd && !pCursor->nOffset)
1106     return;
1107
1108   pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
1109   assert(pRow);
1110   if (pRow->type == diStartRow) {
1111     /* FIXME WTF was I thinking about here ? */
1112     ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
1113     assert(pRun);
1114     pCursor->pRun = pRun;
1115     pCursor->nOffset = 0;
1116     editor->bCaretAtEnd = 1;
1117     return;
1118   }
1119   pCursor->pRun = ME_FindItemBack(pRow, diRun);
1120   assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
1121   pCursor->nOffset = 0;
1122   editor->bCaretAtEnd = FALSE;
1123 }
1124
1125 static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
1126 {
1127   ME_DisplayItem *p = ME_FindItemFwd(pCursor->pRun, diTextEnd);
1128   assert(p);
1129   p = ME_FindItemBack(p, diRun);
1130   assert(p);
1131   assert(p->member.run.nFlags & MERF_ENDPARA);
1132   pCursor->pRun = p;
1133   pCursor->nOffset = 0;
1134   editor->bCaretAtEnd = FALSE;
1135 }
1136
1137 BOOL ME_IsSelection(ME_TextEditor *editor)
1138 {
1139   return memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor))!=0;
1140 }
1141
1142 static int ME_GetSelCursor(ME_TextEditor *editor, int dir)
1143 {
1144   int cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
1145
1146   if (cdir*dir>0)
1147     return 0;
1148   else
1149     return 1;
1150 }
1151
1152 BOOL ME_UpdateSelection(ME_TextEditor *editor, ME_Cursor *pTempCursor)
1153 {
1154   ME_Cursor old_anchor = editor->pCursors[1];
1155
1156   if (GetKeyState(VK_SHIFT)>=0) /* cancelling selection */
1157   {
1158     /* any selection was present ? if so, it's no more, repaint ! */
1159     editor->pCursors[1] = editor->pCursors[0];
1160     if (memcmp(pTempCursor, &old_anchor, sizeof(ME_Cursor))) {
1161       return TRUE;
1162     }
1163     return FALSE;
1164   }
1165   else
1166   {
1167     if (!memcmp(pTempCursor, &editor->pCursors[1], sizeof(ME_Cursor))) /* starting selection */
1168     {
1169       editor->pCursors[1] = *pTempCursor;
1170       return TRUE;
1171     }
1172   }
1173
1174   ME_Repaint(editor);
1175   return TRUE;
1176 }
1177
1178 void ME_DeleteSelection(ME_TextEditor *editor)
1179 {
1180   int from, to;
1181   ME_GetSelection(editor, &from, &to);
1182   ME_DeleteTextAtCursor(editor, ME_GetSelCursor(editor,-1), to-from);
1183 }
1184
1185 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
1186 {
1187   ME_Style *style;
1188   int from, to;
1189   ME_Cursor c;
1190
1191   ME_GetSelection(editor, &from, &to);
1192   ME_CursorFromCharOfs(editor, from, &c);
1193   if (from != to) {
1194     style = c.pRun->member.run.style;
1195     ME_AddRefStyle(style); /* ME_GetInsertStyle has already done that */
1196   }
1197   else
1198     style = ME_GetInsertStyle(editor, 0);
1199   return style;
1200 }
1201
1202 void ME_SendSelChange(ME_TextEditor *editor)
1203 {
1204   SELCHANGE sc;
1205
1206   ME_ClearTempStyle(editor);
1207
1208   if (!(editor->nEventMask & ENM_SELCHANGE))
1209     return;
1210
1211   sc.nmhdr.hwndFrom = editor->hWnd;
1212   sc.nmhdr.idFrom = GetWindowLongW(editor->hWnd, GWLP_ID);
1213   sc.nmhdr.code = EN_SELCHANGE;
1214   SendMessageW(editor->hWnd, EM_EXGETSEL, 0, (LPARAM)&sc.chrg);
1215   sc.seltyp = SEL_EMPTY;
1216   if (sc.chrg.cpMin != sc.chrg.cpMax)
1217     sc.seltyp |= SEL_TEXT;
1218   if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* wth were RICHEDIT authors thinking ? */
1219     sc.seltyp |= SEL_MULTICHAR;
1220   SendMessageW(GetParent(editor->hWnd), WM_NOTIFY, sc.nmhdr.idFrom, (LPARAM)&sc);
1221 }
1222
1223
1224 BOOL
1225 ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
1226 {
1227   int nCursor = 0;
1228   ME_Cursor *p = &editor->pCursors[nCursor];
1229   ME_Cursor tmp_curs = *p;
1230   BOOL success = FALSE;
1231
1232   ME_CheckCharOffsets(editor);
1233   editor->nUDArrowX = -1;
1234   switch(nVKey) {
1235     case VK_LEFT:
1236       editor->bCaretAtEnd = 0;
1237       if (ctrl)
1238         success = ME_MoveCursorWords(editor, &tmp_curs, -1);
1239       else
1240         success = ME_MoveCursorChars(editor, &tmp_curs, -1);
1241       break;
1242     case VK_RIGHT:
1243       editor->bCaretAtEnd = 0;
1244       if (ctrl)
1245         success = ME_MoveCursorWords(editor, &tmp_curs, +1);
1246       else
1247         success = ME_MoveCursorChars(editor, &tmp_curs, +1);
1248       break;
1249     case VK_UP:
1250       ME_MoveCursorLines(editor, &tmp_curs, -1);
1251       break;
1252     case VK_DOWN:
1253       ME_MoveCursorLines(editor, &tmp_curs, +1);
1254       break;
1255     case VK_PRIOR:
1256       ME_ArrowPageUp(editor, &tmp_curs);
1257       break;
1258     case VK_NEXT:
1259       ME_ArrowPageDown(editor, &tmp_curs);
1260       break;
1261     case VK_HOME: {
1262       if (ctrl)
1263         ME_ArrowCtrlHome(editor, &tmp_curs);
1264       else
1265         ME_ArrowHome(editor, &tmp_curs);
1266       editor->bCaretAtEnd = 0;
1267       break;
1268     }
1269     case VK_END:
1270       if (ctrl)
1271         ME_ArrowCtrlEnd(editor, &tmp_curs);
1272       else
1273         ME_ArrowEnd(editor, &tmp_curs);
1274       break;
1275   }
1276
1277   if (!extend)
1278     editor->pCursors[1] = tmp_curs;
1279   *p = tmp_curs;
1280
1281   ME_InvalidateSelection(editor);
1282   ME_Repaint(editor);
1283   HideCaret(editor->hWnd);
1284   ME_EnsureVisible(editor, tmp_curs.pRun);
1285   ME_ShowCaret(editor);
1286   ME_SendSelChange(editor);
1287   return success;
1288 }