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