reactos/dll/win32/riched20/table.c

   1 /*
   2  * RichEdit functions dealing with on tables
   3  *
   4  * Copyright 2008 by Dylan Smith
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 /*
  22  * The implementation of tables differs greatly between version 3.0
  23  * (in riched20.dll) and version 4.1 (in msftedit.dll) of richedit controls.
  24  * Currently Wine is not distinguishing between version 3.0 and version 4.1,
  25  * so v4.1 is assumed unless v1.0 is being emulated (i.e. riched32.dll is used).
  26  * If this lack of distinction causes a bug in a Windows application, then Wine
  27  * will need to start making this distinction.
  28  *
  29  * Richedit version 1.0 - 3.0:
  30  *   Tables are implemented in these versions using tabs at the end of cells,
  31  *   and tab stops to position the cells.  The paragraph format flag PFE_TABLE
  32  *   will indicate that the paragraph is a table row.  Note that in this
  33  *   implementation there is one paragraph per table row.
  34  *
  35  * Richedit version 4.1:
  36  *   Tables are implemented such that cells can contain multiple paragraphs,
  37  *   each with it's own paragraph format, and cells may even contain tables
  38  *   nested within the cell.
  39  *
  40  *   There is also a paragraph at the start of each table row that contains
  41  *   the rows paragraph format (e.g. to change the row alignment to row), and a
  42  *   paragraph at the end of the table row with the PFE_TABLEROWDELIMITER flag
  43  *   set. The paragraphs at the start and end of the table row should always be
  44  *   empty, but should have a length of 2.
  45  *
  46  *   Wine implements this using display items (ME_DisplayItem) with a type of
  47  *   diCell.  These cell display items store the cell properties, and are
  48  *   inserted into the editors linked list before each cell, and at the end of
  49  *   the last cell. The cell display item for a cell comes before the paragraphs
  50  *   for the cell, but the last cell display item refers to no cell, so it is
  51  *   just a delimiter.
  52  */
  53
  54 #include "editor.h"
  55 #include "rtf.h"
  56
  57 WINE_DEFAULT_DEBUG_CHANNEL(richedit_lists);
  58
  59 static ME_DisplayItem* ME_InsertEndParaFromCursor(ME_TextEditor *editor,
  60                                                   int nCursor,
  61                                                   ME_String *eol_str,
  62                                                   int paraFlags)
  63 {
  64   ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
  65   ME_DisplayItem *tp;
  66   ME_Cursor* cursor = &editor->pCursors[nCursor];
  67   if (cursor->nOffset)
  68     ME_SplitRunSimple(editor, cursor);
  69
  70   tp = ME_SplitParagraph(editor, cursor->pRun, pStyle, eol_str, paraFlags);
  71   ME_ReleaseStyle(pStyle);
  72   cursor->pPara = tp;
  73   cursor->pRun = ME_FindItemFwd(tp, diRun);
  74   return tp;
  75 }
  76
  77 ME_DisplayItem* ME_InsertTableRowStartFromCursor(ME_TextEditor *editor)
  78 {
  79   ME_DisplayItem *para;
  80   WCHAR cr_lf[] = {'\r', '\n', 0};
  81   ME_String *eol_str = ME_MakeStringN(cr_lf, 2);
  82   para = ME_InsertEndParaFromCursor(editor, 0, eol_str, MEPF_ROWSTART);
  83   return para->member.para.prev_para;
  84 }
  85
  86 ME_DisplayItem* ME_InsertTableRowStartAtParagraph(ME_TextEditor *editor,
  87                                                   ME_DisplayItem *para)
  88 {
  89   ME_DisplayItem *prev_para, *end_para;
  90   ME_Cursor savedCursor = editor->pCursors[0];
  91   ME_DisplayItem *startRowPara;
  92   editor->pCursors[0].pPara = para;
  93   editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
  94   editor->pCursors[0].nOffset = 0;
  95   editor->pCursors[1] = editor->pCursors[0];
  96   startRowPara = ME_InsertTableRowStartFromCursor(editor);
  97   savedCursor.pPara = ME_GetParagraph(savedCursor.pRun);
  98   editor->pCursors[0] = savedCursor;
  99   editor->pCursors[1] = editor->pCursors[0];
 100
 101   end_para = editor->pCursors[0].pPara->member.para.next_para;
 102   prev_para = startRowPara->member.para.next_para;
 103   para = prev_para->member.para.next_para;
 104   while (para != end_para)
 105   {
 106     para->member.para.pCell = prev_para->member.para.pCell;
 107     para->member.para.nFlags |= MEPF_CELL;
 108     para->member.para.nFlags &= ~(MEPF_ROWSTART|MEPF_ROWEND);
 109     para->member.para.pFmt->dwMask |= PFM_TABLE|PFM_TABLEROWDELIMITER;
 110     para->member.para.pFmt->wEffects |= PFE_TABLE;
 111     para->member.para.pFmt->wEffects &= ~PFE_TABLEROWDELIMITER;
 112     prev_para = para;
 113     para = para->member.para.next_para;
 114   }
 115   return startRowPara;
 116 }
 117
 118 /* Inserts a diCell and starts a new paragraph for the next cell.
 119  *
 120  * Returns the first paragraph of the new cell. */
 121 ME_DisplayItem* ME_InsertTableCellFromCursor(ME_TextEditor *editor)
 122 {
 123   ME_DisplayItem *para;
 124   WCHAR tab = '\t';
 125   ME_String *eol_str = ME_MakeStringN(&tab, 1);
 126   para = ME_InsertEndParaFromCursor(editor, 0, eol_str, MEPF_CELL);
 127   return para;
 128 }
 129
 130 ME_DisplayItem* ME_InsertTableRowEndFromCursor(ME_TextEditor *editor)
 131 {
 132   ME_DisplayItem *para;
 133   WCHAR cr_lf[] = {'\r', '\n', 0};
 134   ME_String *eol_str = ME_MakeStringN(cr_lf, 2);
 135   para = ME_InsertEndParaFromCursor(editor, 0, eol_str, MEPF_ROWEND);
 136   return para->member.para.prev_para;
 137 }
 138
 139 ME_DisplayItem* ME_GetTableRowEnd(ME_DisplayItem *para)
 140 {
 141   ME_DisplayItem *cell;
 142   assert(para);
 143   if (para->member.para.nFlags & MEPF_ROWEND)
 144     return para;
 145   if (para->member.para.nFlags & MEPF_ROWSTART)
 146     para = para->member.para.next_para;
 147   cell = para->member.para.pCell;
 148   assert(cell && cell->type == diCell);
 149   while (cell->member.cell.next_cell)
 150     cell = cell->member.cell.next_cell;
 151
 152   para = ME_FindItemFwd(cell, diParagraph);
 153   assert(para && para->member.para.nFlags & MEPF_ROWEND);
 154   return para;
 155 }
 156
 157 ME_DisplayItem* ME_GetTableRowStart(ME_DisplayItem *para)
 158 {
 159   ME_DisplayItem *cell;
 160   assert(para);
 161   if (para->member.para.nFlags & MEPF_ROWSTART)
 162     return para;
 163   if (para->member.para.nFlags & MEPF_ROWEND)
 164     para = para->member.para.prev_para;
 165   cell = para->member.para.pCell;
 166   assert(cell && cell->type == diCell);
 167   while (cell->member.cell.prev_cell)
 168     cell = cell->member.cell.prev_cell;
 169
 170   para = ME_FindItemBack(cell, diParagraph);
 171   assert(para && para->member.para.nFlags & MEPF_ROWSTART);
 172   return para;
 173 }
 174
 175 ME_DisplayItem* ME_GetOuterParagraph(ME_DisplayItem *para)
 176 {
 177   if (para->member.para.nFlags & MEPF_ROWEND)
 178     para = para->member.para.prev_para;
 179   while (para->member.para.pCell)
 180   {
 181     para = ME_GetTableRowStart(para);
 182     if (!para->member.para.pCell)
 183       break;
 184     para = ME_FindItemBack(para->member.para.pCell, diParagraph);
 185   }
 186   return para;
 187 }
 188
 189 /* Make a bunch of assertions to make sure tables haven't been corrupted.
 190  *
 191  * These invariants may not hold true in the middle of streaming in rich text
 192  * or during an undo and redo of streaming in rich text. It should be safe to
 193  * call this method after an event is processed.
 194  */
 195 void ME_CheckTablesForCorruption(ME_TextEditor *editor)
 196 {
 197   if(TRACE_ON(richedit_lists))
 198   {
 199     TRACE("---\n");
 200     ME_DumpDocument(editor->pBuffer);
 201   }
 202 #ifndef NDEBUG
 203   {
 204     ME_DisplayItem *p, *pPrev;
 205     pPrev = editor->pBuffer->pFirst;
 206     p = pPrev->next;
 207     if (!editor->bEmulateVersion10) /* v4.1 */
 208     {
 209       while (p->type == diParagraph)
 210       {
 211         assert(p->member.para.pFmt->dwMask & PFM_TABLE);
 212         assert(p->member.para.pFmt->dwMask & PFM_TABLEROWDELIMITER);
 213         if (p->member.para.pCell)
 214         {
 215           assert(p->member.para.nFlags & MEPF_CELL);
 216           assert(p->member.para.pFmt->wEffects & PFE_TABLE);
 217         }
 218         if (p->member.para.pCell != pPrev->member.para.pCell)
 219         {
 220           /* There must be a diCell in between the paragraphs if pCell changes. */
 221           ME_DisplayItem *pCell = ME_FindItemBack(p, diCell);
 222           assert(pCell);
 223           assert(ME_FindItemBack(p, diRun) == ME_FindItemBack(pCell, diRun));
 224         }
 225         if (p->member.para.nFlags & MEPF_ROWEND)
 226         {
 227           /* ROWEND must come after a cell. */
 228           assert(pPrev->member.para.pCell);
 229           assert(p->member.para.pCell
 230                  == pPrev->member.para.pCell->member.cell.parent_cell);
 231           assert(p->member.para.pFmt->wEffects & PFE_TABLEROWDELIMITER);
 232         }
 233         else if (p->member.para.pCell)
 234         {
 235           assert(!(p->member.para.pFmt->wEffects & PFE_TABLEROWDELIMITER));
 236           assert(pPrev->member.para.pCell ||
 237                  pPrev->member.para.nFlags & MEPF_ROWSTART);
 238           if (pPrev->member.para.pCell &&
 239               !(pPrev->member.para.nFlags & MEPF_ROWSTART))
 240           {
 241             assert(p->member.para.pCell->member.cell.parent_cell
 242                    == pPrev->member.para.pCell->member.cell.parent_cell);
 243             if (pPrev->member.para.pCell != p->member.para.pCell)
 244               assert(pPrev->member.para.pCell
 245                      == p->member.para.pCell->member.cell.prev_cell);
 246           }
 247         }
 248         else if (!(p->member.para.nFlags & MEPF_ROWSTART))
 249         {
 250           assert(!(p->member.para.pFmt->wEffects & PFE_TABLEROWDELIMITER));
 251           /* ROWSTART must be followed by a cell. */
 252           assert(!(p->member.para.nFlags & MEPF_CELL));
 253           /* ROWSTART must be followed by a cell. */
 254           assert(!(pPrev->member.para.nFlags & MEPF_ROWSTART));
 255         }
 256         pPrev = p;
 257         p = p->member.para.next_para;
 258       }
 259     } else { /* v1.0 - 3.0 */
 260       while (p->type == diParagraph)
 261       {
 262         assert(!(p->member.para.nFlags & (MEPF_ROWSTART|MEPF_ROWEND|MEPF_CELL)));
 263         assert(p->member.para.pFmt->dwMask & PFM_TABLE);
 264         assert(!(p->member.para.pFmt->wEffects & PFE_TABLEROWDELIMITER));
 265         assert(!p->member.para.pCell);
 266         p = p->member.para.next_para;
 267       }
 268       return;
 269     }
 270     assert(p->type == diTextEnd);
 271     assert(!pPrev->member.para.pCell);
 272   }
 273 #endif
 274 }
 275
 276 BOOL ME_IsInTable(ME_DisplayItem *pItem)
 277 {
 278   PARAFORMAT2 *pFmt;
 279   if (!pItem)
 280     return FALSE;
 281   if (pItem->type == diRun)
 282     pItem = ME_GetParagraph(pItem);
 283   if (pItem->type != diParagraph)
 284     return FALSE;
 285   pFmt = pItem->member.para.pFmt;
 286   return pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE;
 287 }
 288
 289 /* Table rows should either be deleted completely or not at all. */
 290 void ME_ProtectPartialTableDeletion(ME_TextEditor *editor, ME_Cursor *c, int *nChars)
 291 {
 292   int nOfs = ME_GetCursorOfs(c);
 293   ME_Cursor c2 = *c;
 294   ME_DisplayItem *this_para = c->pPara;
 295   ME_DisplayItem *end_para;
 296
 297   ME_MoveCursorChars(editor, &c2, *nChars);
 298   end_para = c2.pPara;
 299   if (c2.pRun->member.run.nFlags & MERF_ENDPARA) {
 300     /* End offset might be in the middle of the end paragraph run.
 301      * If this is the case, then we need to use the next paragraph as the last
 302      * paragraphs.
 303      */
 304     int remaining = nOfs + *nChars - c2.pRun->member.run.nCharOfs
 305                     - end_para->member.para.nCharOfs;
 306     if (remaining)
 307     {
 308       assert(remaining < c2.pRun->member.run.strText->nLen);
 309       end_para = end_para->member.para.next_para;
 310     }
 311   }
 312   if (!editor->bEmulateVersion10) { /* v4.1 */
 313     if (this_para->member.para.pCell != end_para->member.para.pCell ||
 314         ((this_para->member.para.nFlags|end_para->member.para.nFlags)
 315          & (MEPF_ROWSTART|MEPF_ROWEND)))
 316     {
 317       while (this_para != end_para)
 318       {
 319         ME_DisplayItem *next_para = this_para->member.para.next_para;
 320         BOOL bTruancateDeletion = FALSE;
 321         if (this_para->member.para.nFlags & MEPF_ROWSTART) {
 322           /* The following while loop assumes that next_para is MEPF_ROWSTART,
 323            * so moving back one paragraph let's it be processed as the start
 324            * of the row. */
 325           next_para = this_para;
 326           this_para = this_para->member.para.prev_para;
 327         } else if (next_para->member.para.pCell != this_para->member.para.pCell
 328                    || this_para->member.para.nFlags & MEPF_ROWEND)
 329         {
 330           /* Start of the deletion from after the start of the table row. */
 331           bTruancateDeletion = TRUE;
 332         }
 333         while (!bTruancateDeletion &&
 334                next_para->member.para.nFlags & MEPF_ROWSTART)
 335         {
 336           next_para = ME_GetTableRowEnd(next_para)->member.para.next_para;
 337           if (next_para->member.para.nCharOfs > nOfs + *nChars)
 338           {
 339             /* End of deletion is not past the end of the table row. */
 340             next_para = this_para->member.para.next_para;
 341             /* Delete the end paragraph preceding the table row if the
 342              * preceding table row will be empty. */
 343             if (this_para->member.para.nCharOfs >= nOfs)
 344             {
 345               next_para = next_para->member.para.next_para;
 346             }
 347             bTruancateDeletion = TRUE;
 348           } else {
 349             this_para = next_para->member.para.prev_para;
 350           }
 351         }
 352         if (bTruancateDeletion)
 353         {
 354           ME_Run *end_run = &ME_FindItemBack(next_para, diRun)->member.run;
 355           int nCharsNew = (next_para->member.para.nCharOfs - nOfs
 356                            - end_run->strText->nLen);
 357           nCharsNew = max(nCharsNew, 0);
 358           assert(nCharsNew <= *nChars);
 359           *nChars = nCharsNew;
 360           break;
 361         }
 362         this_para = next_para;
 363       }
 364     }
 365   } else { /* v1.0 - 3.0 */
 366     ME_DisplayItem *pRun;
 367     int nCharsToBoundary;
 368
 369     if ((this_para->member.para.nCharOfs != nOfs || this_para == end_para) &&
 370         this_para->member.para.pFmt->dwMask & PFM_TABLE &&
 371         this_para->member.para.pFmt->wEffects & PFE_TABLE)
 372     {
 373       pRun = c->pRun;
 374       /* Find the next tab or end paragraph to use as a delete boundary */
 375       while (!(pRun->member.run.nFlags & (MERF_TAB|MERF_ENDPARA)))
 376         pRun = ME_FindItemFwd(pRun, diRun);
 377       nCharsToBoundary = pRun->member.run.nCharOfs
 378                          - c->pRun->member.run.nCharOfs
 379                          - c->nOffset;
 380       *nChars = min(*nChars, nCharsToBoundary);
 381     } else if (end_para->member.para.pFmt->dwMask & PFM_TABLE &&
 382                end_para->member.para.pFmt->wEffects & PFE_TABLE)
 383     {
 384       /* The deletion starts from before the row, so don't join it with
 385        * previous non-empty paragraphs. */
 386       ME_DisplayItem *curPara;
 387       pRun = NULL;
 388       if (nOfs > this_para->member.para.nCharOfs) {
 389         pRun = ME_FindItemBack(end_para, diRun);
 390         curPara = end_para->member.para.prev_para;
 391       }
 392       if (!pRun) {
 393         pRun = ME_FindItemFwd(end_para, diRun);
 394         curPara = end_para;
 395       }
 396       if (pRun)
 397       {
 398         nCharsToBoundary = curPara->member.para.nCharOfs
 399                            + pRun->member.run.nCharOfs
 400                            - nOfs;
 401         if (nCharsToBoundary >= 0)
 402           *nChars = min(*nChars, nCharsToBoundary);
 403       }
 404     }
 405     if (*nChars < 0)
 406       nChars = 0;
 407   }
 408 }
 409
 410 ME_DisplayItem* ME_AppendTableRow(ME_TextEditor *editor,
 411                                   ME_DisplayItem *table_row)
 412 {
 413   WCHAR endl = '\r', tab = '\t';
 414   ME_DisplayItem *run;
 415   PARAFORMAT2 *pFmt;
 416   int i;
 417
 418   assert(table_row);
 419   assert(table_row->type == diParagraph);
 420   if (!editor->bEmulateVersion10) { /* v4.1 */
 421     ME_DisplayItem *insertedCell, *para, *cell, *prevTableEnd;
 422     cell = ME_FindItemFwd(ME_GetTableRowStart(table_row), diCell);
 423     prevTableEnd = ME_GetTableRowEnd(table_row);
 424     para = prevTableEnd->member.para.next_para;
 425     run = ME_FindItemFwd(para, diRun);
 426     editor->pCursors[0].pPara = para;
 427     editor->pCursors[0].pRun = run;
 428     editor->pCursors[0].nOffset = 0;
 429     editor->pCursors[1] = editor->pCursors[0];
 430     para = ME_InsertTableRowStartFromCursor(editor);
 431     insertedCell = ME_FindItemFwd(para, diCell);
 432     /* Copy cell properties */
 433     insertedCell->member.cell.nRightBoundary = cell->member.cell.nRightBoundary;
 434     insertedCell->member.cell.border = cell->member.cell.border;
 435     while (cell->member.cell.next_cell) {
 436       cell = cell->member.cell.next_cell;
 437       para = ME_InsertTableCellFromCursor(editor);
 438       insertedCell = ME_FindItemBack(para, diCell);
 439       /* Copy cell properties */
 440       insertedCell->member.cell.nRightBoundary = cell->member.cell.nRightBoundary;
 441       insertedCell->member.cell.border = cell->member.cell.border;
 442     };
 443     para = ME_InsertTableRowEndFromCursor(editor);
 444     *para->member.para.pFmt = *prevTableEnd->member.para.pFmt;
 445     /* return the table row start for the inserted paragraph */
 446     return ME_FindItemFwd(cell, diParagraph)->member.para.next_para;
 447   } else { /* v1.0 - 3.0 */
 448     run = ME_FindItemBack(table_row->member.para.next_para, diRun);
 449     pFmt = table_row->member.para.pFmt;
 450     assert(pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE);
 451     editor->pCursors[0].pPara = table_row;
 452     editor->pCursors[0].pRun = run;
 453     editor->pCursors[0].nOffset = 0;
 454     editor->pCursors[1] = editor->pCursors[0];
 455     ME_InsertTextFromCursor(editor, 0, &endl, 1, run->member.run.style);
 456     run = editor->pCursors[0].pRun;
 457     for (i = 0; i < pFmt->cTabCount; i++) {
 458       ME_InsertTextFromCursor(editor, 0, &tab, 1, run->member.run.style);
 459     }
 460     return table_row->member.para.next_para;
 461   }
 462 }
 463
 464 /* Selects the next table cell or appends a new table row if at end of table */
 465 static void ME_SelectOrInsertNextCell(ME_TextEditor *editor,
 466                                       ME_DisplayItem *run)
 467 {
 468   ME_DisplayItem *para = ME_GetParagraph(run);
 469   int i;
 470
 471   assert(run && run->type == diRun);
 472   assert(ME_IsInTable(run));
 473   if (!editor->bEmulateVersion10) { /* v4.1 */
 474     ME_DisplayItem *cell;
 475     /* Get the initial cell */
 476     if (para->member.para.nFlags & MEPF_ROWSTART) {
 477       cell = para->member.para.next_para->member.para.pCell;
 478     } else if (para->member.para.nFlags & MEPF_ROWEND) {
 479       cell = para->member.para.prev_para->member.para.pCell;
 480     } else {
 481       cell = para->member.para.pCell;
 482     }
 483     assert(cell);
 484     /* Get the next cell. */
 485     if (cell->member.cell.next_cell &&
 486         cell->member.cell.next_cell->member.cell.next_cell)
 487     {
 488       cell = cell->member.cell.next_cell;
 489     } else {
 490       para = ME_GetTableRowEnd(ME_FindItemFwd(cell, diParagraph));
 491       para = para->member.para.next_para;
 492       assert(para);
 493       if (para->member.para.nFlags & MEPF_ROWSTART) {
 494         cell = para->member.para.next_para->member.para.pCell;
 495       } else {
 496         /* Insert row */
 497         para = para->member.para.prev_para;
 498         para = ME_AppendTableRow(editor, ME_GetTableRowStart(para));
 499         /* Put cursor at the start of the new table row */
 500         para = para->member.para.next_para;
 501         editor->pCursors[0].pPara = para;
 502         editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
 503         editor->pCursors[0].nOffset = 0;
 504         editor->pCursors[1] = editor->pCursors[0];
 505         ME_WrapMarkedParagraphs(editor);
 506         return;
 507       }
 508     }
 509     /* Select cell */
 510     editor->pCursors[1].pRun = ME_FindItemFwd(cell, diRun);
 511     editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
 512     editor->pCursors[1].nOffset = 0;
 513     assert(editor->pCursors[0].pRun);
 514     cell = cell->member.cell.next_cell;
 515     editor->pCursors[0].pRun = ME_FindItemBack(cell, diRun);
 516     editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
 517     editor->pCursors[0].nOffset = 0;
 518     assert(editor->pCursors[1].pRun);
 519   } else { /* v1.0 - 3.0 */
 520     if (run->member.run.nFlags & MERF_ENDPARA &&
 521         ME_IsInTable(ME_FindItemFwd(run, diParagraphOrEnd)))
 522     {
 523       run = ME_FindItemFwd(run, diRun);
 524       assert(run);
 525     }
 526     for (i = 0; i < 2; i++)
 527     {
 528       while (!(run->member.run.nFlags & MERF_TAB))
 529       {
 530         run = ME_FindItemFwd(run, diRunOrParagraphOrEnd);
 531         if (run->type != diRun)
 532         {
 533           para = run;
 534           if (ME_IsInTable(para))
 535           {
 536             run = ME_FindItemFwd(para, diRun);
 537             assert(run);
 538             editor->pCursors[0].pPara = para;
 539             editor->pCursors[0].pRun = run;
 540             editor->pCursors[0].nOffset = 0;
 541             i = 1;
 542           } else {
 543             /* Insert table row */
 544             para = ME_AppendTableRow(editor, para->member.para.prev_para);
 545             /* Put cursor at the start of the new table row */
 546             editor->pCursors[0].pPara = para;
 547             editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
 548             editor->pCursors[0].nOffset = 0;
 549             editor->pCursors[1] = editor->pCursors[0];
 550             ME_WrapMarkedParagraphs(editor);
 551             return;
 552           }
 553         }
 554       }
 555       if (i == 0)
 556         run = ME_FindItemFwd(run, diRun);
 557       editor->pCursors[i].pRun = run;
 558       editor->pCursors[i].pPara = ME_GetParagraph(run);
 559       editor->pCursors[i].nOffset = 0;
 560     }
 561   }
 562 }
 563
 564
 565 void ME_TabPressedInTable(ME_TextEditor *editor, BOOL bSelectedRow)
 566 {
 567   /* FIXME: Shift tab should move to the previous cell. */
 568   ME_Cursor fromCursor, toCursor;
 569   ME_InvalidateSelection(editor);
 570   {
 571     int from, to;
 572     from = ME_GetCursorOfs(&editor->pCursors[0]);
 573     to = ME_GetCursorOfs(&editor->pCursors[1]);
 574     if (from <= to)
 575     {
 576       fromCursor = editor->pCursors[0];
 577       toCursor = editor->pCursors[1];
 578     } else {
 579       fromCursor = editor->pCursors[1];
 580       toCursor = editor->pCursors[0];
 581     }
 582   }
 583   if (!editor->bEmulateVersion10) /* v4.1 */
 584   {
 585     if (!ME_IsInTable(toCursor.pRun))
 586     {
 587       editor->pCursors[0] = toCursor;
 588       editor->pCursors[1] = toCursor;
 589     } else {
 590       ME_SelectOrInsertNextCell(editor, toCursor.pRun);
 591     }
 592   } else { /* v1.0 - 3.0 */
 593     if (!ME_IsInTable(fromCursor.pRun)) {
 594       editor->pCursors[0] = fromCursor;
 595       editor->pCursors[1] = fromCursor;
 596       /* FIXME: For some reason the caret is shown at the start of the
 597        *        previous paragraph in v1.0 to v3.0, and bCaretAtEnd only works
 598        *        within the paragraph for wrapped lines. */
 599       if (ME_FindItemBack(fromCursor.pRun, diRun))
 600         editor->bCaretAtEnd = TRUE;
 601     } else if ((bSelectedRow || !ME_IsInTable(toCursor.pRun))) {
 602       ME_SelectOrInsertNextCell(editor, fromCursor.pRun);
 603     } else {
 604       if (ME_IsSelection(editor) && !toCursor.nOffset)
 605       {
 606         ME_DisplayItem *run;
 607         run = ME_FindItemBack(toCursor.pRun, diRunOrParagraphOrEnd);
 608         if (run->type == diRun && run->member.run.nFlags & MERF_TAB)
 609           ME_SelectOrInsertNextCell(editor, run);
 610         else
 611           ME_SelectOrInsertNextCell(editor, toCursor.pRun);
 612       } else {
 613         ME_SelectOrInsertNextCell(editor, toCursor.pRun);
 614       }
 615     }
 616   }
 617   ME_InvalidateSelection(editor);
 618   ME_Repaint(editor);
 619   ITextHost_TxShowCaret(editor->texthost, FALSE);
 620   ME_ShowCaret(editor);
 621   ME_SendSelChange(editor);
 622 }
 623
 624 /* Make sure the cursor is not in the hidden table row start paragraph
 625  * without a selection. */
 626 void ME_MoveCursorFromTableRowStartParagraph(ME_TextEditor *editor)
 627 {
 628   ME_DisplayItem *para = editor->pCursors[0].pPara;
 629   if (para == editor->pCursors[1].pPara &&
 630       para->member.para.nFlags & MEPF_ROWSTART) {
 631     /* The cursors should not be at the hidden start row paragraph without
 632      * a selection, so the cursor is moved into the first cell. */
 633     para = para->member.para.next_para;
 634     editor->pCursors[0].pPara = para;
 635     editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
 636     editor->pCursors[0].nOffset = 0;
 637     editor->pCursors[1] = editor->pCursors[0];
 638   }
 639 }
 640
 641 struct RTFTable *ME_MakeTableDef(ME_TextEditor *editor)
 642 {
 643   RTFTable *tableDef = ALLOC_OBJ(RTFTable);
 644   ZeroMemory(tableDef, sizeof(RTFTable));
 645   if (!editor->bEmulateVersion10) /* v4.1 */
 646     tableDef->gapH = 10;
 647   return tableDef;
 648 }
 649
 650 void ME_InitTableDef(ME_TextEditor *editor, struct RTFTable *tableDef)
 651 {
 652   ZeroMemory(tableDef->cells, sizeof(tableDef->cells));
 653   ZeroMemory(tableDef->border, sizeof(tableDef->border));
 654   tableDef->numCellsDefined = 0;
 655   tableDef->leftEdge = 0;
 656   if (!editor->bEmulateVersion10) /* v4.1 */
 657     tableDef->gapH = 10;
 658   else /* v1.0 - 3.0 */
 659     tableDef->gapH = 0;
 660 }