dlls/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 its 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                                                   const WCHAR *eol_str, int eol_len,
  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, eol_len, 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   para = ME_InsertEndParaFromCursor(editor, 0, cr_lf, 2, MEPF_ROWSTART);
  82   return para->member.para.prev_para;
  83 }
  84
  85 ME_DisplayItem* ME_InsertTableRowStartAtParagraph(ME_TextEditor *editor,
  86                                                   ME_DisplayItem *para)
  87 {
  88   ME_DisplayItem *prev_para, *end_para;
  89   ME_Cursor savedCursor = editor->pCursors[0];
  90   ME_DisplayItem *startRowPara;
  91   editor->pCursors[0].pPara = para;
  92   editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
  93   editor->pCursors[0].nOffset = 0;
  94   editor->pCursors[1] = editor->pCursors[0];
  95   startRowPara = ME_InsertTableRowStartFromCursor(editor);
  96   savedCursor.pPara = ME_GetParagraph(savedCursor.pRun);
  97   editor->pCursors[0] = savedCursor;
  98   editor->pCursors[1] = editor->pCursors[0];
  99
 100   end_para = editor->pCursors[0].pPara->member.para.next_para;
 101   prev_para = startRowPara->member.para.next_para;
 102   para = prev_para->member.para.next_para;
 103   while (para != end_para)
 104   {
 105     para->member.para.pCell = prev_para->member.para.pCell;
 106     para->member.para.nFlags |= MEPF_CELL;
 107     para->member.para.nFlags &= ~(MEPF_ROWSTART|MEPF_ROWEND);
 108     para->member.para.pFmt->dwMask |= PFM_TABLE|PFM_TABLEROWDELIMITER;
 109     para->member.para.pFmt->wEffects |= PFE_TABLE;
 110     para->member.para.pFmt->wEffects &= ~PFE_TABLEROWDELIMITER;
 111     prev_para = para;
 112     para = para->member.para.next_para;
 113   }
 114   return startRowPara;
 115 }
 116
 117 /* Inserts a diCell and starts a new paragraph for the next cell.
 118  *
 119  * Returns the first paragraph of the new cell. */
 120 ME_DisplayItem* ME_InsertTableCellFromCursor(ME_TextEditor *editor)
 121 {
 122   ME_DisplayItem *para;
 123   WCHAR tab = '\t';
 124   para = ME_InsertEndParaFromCursor(editor, 0, &tab, 1, MEPF_CELL);
 125   return para;
 126 }
 127
 128 ME_DisplayItem* ME_InsertTableRowEndFromCursor(ME_TextEditor *editor)
 129 {
 130   ME_DisplayItem *para;
 131   WCHAR cr_lf[] = {'\r', '\n', 0};
 132   para = ME_InsertEndParaFromCursor(editor, 0, cr_lf, 2, MEPF_ROWEND);
 133   return para->member.para.prev_para;
 134 }
 135
 136 ME_DisplayItem* ME_GetTableRowEnd(ME_DisplayItem *para)
 137 {
 138   ME_DisplayItem *cell;
 139   assert(para);
 140   if (para->member.para.nFlags & MEPF_ROWEND)
 141     return para;
 142   if (para->member.para.nFlags & MEPF_ROWSTART)
 143     para = para->member.para.next_para;
 144   cell = para->member.para.pCell;
 145   assert(cell && cell->type == diCell);
 146   while (cell->member.cell.next_cell)
 147     cell = cell->member.cell.next_cell;
 148
 149   para = ME_FindItemFwd(cell, diParagraph);
 150   assert(para && para->member.para.nFlags & MEPF_ROWEND);
 151   return para;
 152 }
 153
 154 ME_DisplayItem* ME_GetTableRowStart(ME_DisplayItem *para)
 155 {
 156   ME_DisplayItem *cell;
 157   assert(para);
 158   if (para->member.para.nFlags & MEPF_ROWSTART)
 159     return para;
 160   if (para->member.para.nFlags & MEPF_ROWEND)
 161     para = para->member.para.prev_para;
 162   cell = para->member.para.pCell;
 163   assert(cell && cell->type == diCell);
 164   while (cell->member.cell.prev_cell)
 165     cell = cell->member.cell.prev_cell;
 166
 167   para = ME_FindItemBack(cell, diParagraph);
 168   assert(para && para->member.para.nFlags & MEPF_ROWSTART);
 169   return para;
 170 }
 171
 172 ME_DisplayItem* ME_GetOuterParagraph(ME_DisplayItem *para)
 173 {
 174   if (para->member.para.nFlags & MEPF_ROWEND)
 175     para = para->member.para.prev_para;
 176   while (para->member.para.pCell)
 177   {
 178     para = ME_GetTableRowStart(para);
 179     if (!para->member.para.pCell)
 180       break;
 181     para = ME_FindItemBack(para->member.para.pCell, diParagraph);
 182   }
 183   return para;
 184 }
 185
 186 /* Make a bunch of assertions to make sure tables haven't been corrupted.
 187  *
 188  * These invariants may not hold true in the middle of streaming in rich text
 189  * or during an undo and redo of streaming in rich text. It should be safe to
 190  * call this method after an event is processed.
 191  */
 192 void ME_CheckTablesForCorruption(ME_TextEditor *editor)
 193 {
 194   if(TRACE_ON(richedit_lists))
 195   {
 196     TRACE("---\n");
 197     ME_DumpDocument(editor->pBuffer);
 198   }
 199 #ifndef NDEBUG
 200   {
 201     ME_DisplayItem *p, *pPrev;
 202     pPrev = editor->pBuffer->pFirst;
 203     p = pPrev->next;
 204     if (!editor->bEmulateVersion10) /* v4.1 */
 205     {
 206       while (p->type == diParagraph)
 207       {
 208         assert(p->member.para.pFmt->dwMask & PFM_TABLE);
 209         assert(p->member.para.pFmt->dwMask & PFM_TABLEROWDELIMITER);
 210         if (p->member.para.pCell)
 211         {
 212           assert(p->member.para.nFlags & MEPF_CELL);
 213           assert(p->member.para.pFmt->wEffects & PFE_TABLE);
 214         }
 215         if (p->member.para.pCell != pPrev->member.para.pCell)
 216         {
 217           /* There must be a diCell in between the paragraphs if pCell changes. */
 218           ME_DisplayItem *pCell = ME_FindItemBack(p, diCell);
 219           assert(pCell);
 220           assert(ME_FindItemBack(p, diRun) == ME_FindItemBack(pCell, diRun));
 221         }
 222         if (p->member.para.nFlags & MEPF_ROWEND)
 223         {
 224           /* ROWEND must come after a cell. */
 225           assert(pPrev->member.para.pCell);
 226           assert(p->member.para.pCell
 227                  == pPrev->member.para.pCell->member.cell.parent_cell);
 228           assert(p->member.para.pFmt->wEffects & PFE_TABLEROWDELIMITER);
 229         }
 230         else if (p->member.para.pCell)
 231         {
 232           assert(!(p->member.para.pFmt->wEffects & PFE_TABLEROWDELIMITER));
 233           assert(pPrev->member.para.pCell ||
 234                  pPrev->member.para.nFlags & MEPF_ROWSTART);
 235           if (pPrev->member.para.pCell &&
 236               !(pPrev->member.para.nFlags & MEPF_ROWSTART))
 237           {
 238             assert(p->member.para.pCell->member.cell.parent_cell
 239                    == pPrev->member.para.pCell->member.cell.parent_cell);
 240             if (pPrev->member.para.pCell != p->member.para.pCell)
 241               assert(pPrev->member.para.pCell
 242                      == p->member.para.pCell->member.cell.prev_cell);
 243           }
 244         }
 245         else if (!(p->member.para.nFlags & MEPF_ROWSTART))
 246         {
 247           assert(!(p->member.para.pFmt->wEffects & PFE_TABLEROWDELIMITER));
 248           /* ROWSTART must be followed by a cell. */
 249           assert(!(p->member.para.nFlags & MEPF_CELL));
 250           /* ROWSTART must be followed by a cell. */
 251           assert(!(pPrev->member.para.nFlags & MEPF_ROWSTART));
 252         }
 253         pPrev = p;
 254         p = p->member.para.next_para;
 255       }
 256     } else { /* v1.0 - 3.0 */
 257       while (p->type == diParagraph)
 258       {
 259         assert(!(p->member.para.nFlags & (MEPF_ROWSTART|MEPF_ROWEND|MEPF_CELL)));
 260         assert(p->member.para.pFmt->dwMask & PFM_TABLE);
 261         assert(!(p->member.para.pFmt->wEffects & PFE_TABLEROWDELIMITER));
 262         assert(!p->member.para.pCell);
 263         p = p->member.para.next_para;
 264       }
 265       return;
 266     }
 267     assert(p->type == diTextEnd);
 268     assert(!pPrev->member.para.pCell);
 269   }
 270 #endif
 271 }
 272
 273 BOOL ME_IsInTable(ME_DisplayItem *pItem)
 274 {
 275   PARAFORMAT2 *pFmt;
 276   if (!pItem)
 277     return FALSE;
 278   if (pItem->type == diRun)
 279     pItem = ME_GetParagraph(pItem);
 280   if (pItem->type != diParagraph)
 281     return FALSE;
 282   pFmt = pItem->member.para.pFmt;
 283   return pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE;
 284 }
 285
 286 /* Table rows should either be deleted completely or not at all. */
 287 void ME_ProtectPartialTableDeletion(ME_TextEditor *editor, ME_Cursor *c, int *nChars)
 288 {
 289   int nOfs = ME_GetCursorOfs(c);
 290   ME_Cursor c2 = *c;
 291   ME_DisplayItem *this_para = c->pPara;
 292   ME_DisplayItem *end_para;
 293
 294   ME_MoveCursorChars(editor, &c2, *nChars);
 295   end_para = c2.pPara;
 296   if (c2.pRun->member.run.nFlags & MERF_ENDPARA) {
 297     /* End offset might be in the middle of the end paragraph run.
 298      * If this is the case, then we need to use the next paragraph as the last
 299      * paragraphs.
 300      */
 301     int remaining = nOfs + *nChars - c2.pRun->member.run.nCharOfs
 302                     - end_para->member.para.nCharOfs;
 303     if (remaining)
 304     {
 305       assert(remaining < c2.pRun->member.run.len);
 306       end_para = end_para->member.para.next_para;
 307     }
 308   }
 309   if (!editor->bEmulateVersion10) { /* v4.1 */
 310     if (this_para->member.para.pCell != end_para->member.para.pCell ||
 311         ((this_para->member.para.nFlags|end_para->member.para.nFlags)
 312          & (MEPF_ROWSTART|MEPF_ROWEND)))
 313     {
 314       while (this_para != end_para)
 315       {
 316         ME_DisplayItem *next_para = this_para->member.para.next_para;
 317         BOOL bTruancateDeletion = FALSE;
 318         if (this_para->member.para.nFlags & MEPF_ROWSTART) {
 319           /* The following while loop assumes that next_para is MEPF_ROWSTART,
 320            * so moving back one paragraph let's it be processed as the start
 321            * of the row. */
 322           next_para = this_para;
 323           this_para = this_para->member.para.prev_para;
 324         } else if (next_para->member.para.pCell != this_para->member.para.pCell
 325                    || this_para->member.para.nFlags & MEPF_ROWEND)
 326         {
 327           /* Start of the deletion from after the start of the table row. */
 328           bTruancateDeletion = TRUE;
 329         }
 330         while (!bTruancateDeletion &&
 331                next_para->member.para.nFlags & MEPF_ROWSTART)
 332         {
 333           next_para = ME_GetTableRowEnd(next_para)->member.para.next_para;
 334           if (next_para->member.para.nCharOfs > nOfs + *nChars)
 335           {
 336             /* End of deletion is not past the end of the table row. */
 337             next_para = this_para->member.para.next_para;
 338             /* Delete the end paragraph preceding the table row if the
 339              * preceding table row will be empty. */
 340             if (this_para->member.para.nCharOfs >= nOfs)
 341             {
 342               next_para = next_para->member.para.next_para;
 343             }
 344             bTruancateDeletion = TRUE;
 345           } else {
 346             this_para = next_para->member.para.prev_para;
 347           }
 348         }
 349         if (bTruancateDeletion)
 350         {
 351           ME_Run *end_run = &ME_FindItemBack(next_para, diRun)->member.run;
 352           int nCharsNew = (next_para->member.para.nCharOfs - nOfs
 353                            - end_run->len);
 354           nCharsNew = max(nCharsNew, 0);
 355           assert(nCharsNew <= *nChars);
 356           *nChars = nCharsNew;
 357           break;
 358         }
 359         this_para = next_para;
 360       }
 361     }
 362   } else { /* v1.0 - 3.0 */
 363     ME_DisplayItem *pRun;
 364     int nCharsToBoundary;
 365
 366     if ((this_para->member.para.nCharOfs != nOfs || this_para == end_para) &&
 367         this_para->member.para.pFmt->dwMask & PFM_TABLE &&
 368         this_para->member.para.pFmt->wEffects & PFE_TABLE)
 369     {
 370       pRun = c->pRun;
 371       /* Find the next tab or end paragraph to use as a delete boundary */
 372       while (!(pRun->member.run.nFlags & (MERF_TAB|MERF_ENDPARA)))
 373         pRun = ME_FindItemFwd(pRun, diRun);
 374       nCharsToBoundary = pRun->member.run.nCharOfs
 375                          - c->pRun->member.run.nCharOfs
 376                          - c->nOffset;
 377       *nChars = min(*nChars, nCharsToBoundary);
 378     } else if (end_para->member.para.pFmt->dwMask & PFM_TABLE &&
 379                end_para->member.para.pFmt->wEffects & PFE_TABLE)
 380     {
 381       /* The deletion starts from before the row, so don't join it with
 382        * previous non-empty paragraphs. */
 383       ME_DisplayItem *curPara;
 384       pRun = NULL;
 385       if (nOfs > this_para->member.para.nCharOfs) {
 386         pRun = ME_FindItemBack(end_para, diRun);
 387         curPara = end_para->member.para.prev_para;
 388       }
 389       if (!pRun) {
 390         pRun = ME_FindItemFwd(end_para, diRun);
 391         curPara = end_para;
 392       }
 393       if (pRun)
 394       {
 395         nCharsToBoundary = curPara->member.para.nCharOfs
 396                            + pRun->member.run.nCharOfs
 397                            - nOfs;
 398         if (nCharsToBoundary >= 0)
 399           *nChars = min(*nChars, nCharsToBoundary);
 400       }
 401     }
 402     if (*nChars < 0)
 403       nChars = 0;
 404   }
 405 }
 406
 407 ME_DisplayItem* ME_AppendTableRow(ME_TextEditor *editor,
 408                                   ME_DisplayItem *table_row)
 409 {
 410   WCHAR endl = '\r', tab = '\t';
 411   ME_DisplayItem *run;
 412   PARAFORMAT2 *pFmt;
 413   int i;
 414
 415   assert(table_row);
 416   assert(table_row->type == diParagraph);
 417   if (!editor->bEmulateVersion10) { /* v4.1 */
 418     ME_DisplayItem *insertedCell, *para, *cell, *prevTableEnd;
 419     cell = ME_FindItemFwd(ME_GetTableRowStart(table_row), diCell);
 420     prevTableEnd = ME_GetTableRowEnd(table_row);
 421     para = prevTableEnd->member.para.next_para;
 422     run = ME_FindItemFwd(para, diRun);
 423     editor->pCursors[0].pPara = para;
 424     editor->pCursors[0].pRun = run;
 425     editor->pCursors[0].nOffset = 0;
 426     editor->pCursors[1] = editor->pCursors[0];
 427     para = ME_InsertTableRowStartFromCursor(editor);
 428     insertedCell = ME_FindItemFwd(para, diCell);
 429     /* Copy cell properties */
 430     insertedCell->member.cell.nRightBoundary = cell->member.cell.nRightBoundary;
 431     insertedCell->member.cell.border = cell->member.cell.border;
 432     while (cell->member.cell.next_cell) {
 433       cell = cell->member.cell.next_cell;
 434       para = ME_InsertTableCellFromCursor(editor);
 435       insertedCell = ME_FindItemBack(para, diCell);
 436       /* Copy cell properties */
 437       insertedCell->member.cell.nRightBoundary = cell->member.cell.nRightBoundary;
 438       insertedCell->member.cell.border = cell->member.cell.border;
 439     };
 440     para = ME_InsertTableRowEndFromCursor(editor);
 441     *para->member.para.pFmt = *prevTableEnd->member.para.pFmt;
 442     /* return the table row start for the inserted paragraph */
 443     return ME_FindItemFwd(cell, diParagraph)->member.para.next_para;
 444   } else { /* v1.0 - 3.0 */
 445     run = ME_FindItemBack(table_row->member.para.next_para, diRun);
 446     pFmt = table_row->member.para.pFmt;
 447     assert(pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE);
 448     editor->pCursors[0].pPara = table_row;
 449     editor->pCursors[0].pRun = run;
 450     editor->pCursors[0].nOffset = 0;
 451     editor->pCursors[1] = editor->pCursors[0];
 452     ME_InsertTextFromCursor(editor, 0, &endl, 1, run->member.run.style);
 453     run = editor->pCursors[0].pRun;
 454     for (i = 0; i < pFmt->cTabCount; i++) {
 455       ME_InsertTextFromCursor(editor, 0, &tab, 1, run->member.run.style);
 456     }
 457     return table_row->member.para.next_para;
 458   }
 459 }
 460
 461 /* Selects the next table cell or appends a new table row if at end of table */
 462 static void ME_SelectOrInsertNextCell(ME_TextEditor *editor,
 463                                       ME_DisplayItem *run)
 464 {
 465   ME_DisplayItem *para = ME_GetParagraph(run);
 466   int i;
 467
 468   assert(run && run->type == diRun);
 469   assert(ME_IsInTable(run));
 470   if (!editor->bEmulateVersion10) { /* v4.1 */
 471     ME_DisplayItem *cell;
 472     /* Get the initial cell */
 473     if (para->member.para.nFlags & MEPF_ROWSTART) {
 474       cell = para->member.para.next_para->member.para.pCell;
 475     } else if (para->member.para.nFlags & MEPF_ROWEND) {
 476       cell = para->member.para.prev_para->member.para.pCell;
 477     } else {
 478       cell = para->member.para.pCell;
 479     }
 480     assert(cell);
 481     /* Get the next cell. */
 482     if (cell->member.cell.next_cell &&
 483         cell->member.cell.next_cell->member.cell.next_cell)
 484     {
 485       cell = cell->member.cell.next_cell;
 486     } else {
 487       para = ME_GetTableRowEnd(ME_FindItemFwd(cell, diParagraph));
 488       para = para->member.para.next_para;
 489       assert(para);
 490       if (para->member.para.nFlags & MEPF_ROWSTART) {
 491         cell = para->member.para.next_para->member.para.pCell;
 492       } else {
 493         /* Insert row */
 494         para = para->member.para.prev_para;
 495         para = ME_AppendTableRow(editor, ME_GetTableRowStart(para));
 496         /* Put cursor at the start of the new table row */
 497         para = para->member.para.next_para;
 498         editor->pCursors[0].pPara = para;
 499         editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
 500         editor->pCursors[0].nOffset = 0;
 501         editor->pCursors[1] = editor->pCursors[0];
 502         ME_WrapMarkedParagraphs(editor);
 503         return;
 504       }
 505     }
 506     /* Select cell */
 507     editor->pCursors[1].pRun = ME_FindItemFwd(cell, diRun);
 508     editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
 509     editor->pCursors[1].nOffset = 0;
 510     assert(editor->pCursors[0].pRun);
 511     cell = cell->member.cell.next_cell;
 512     editor->pCursors[0].pRun = ME_FindItemBack(cell, diRun);
 513     editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
 514     editor->pCursors[0].nOffset = 0;
 515     assert(editor->pCursors[1].pRun);
 516   } else { /* v1.0 - 3.0 */
 517     if (run->member.run.nFlags & MERF_ENDPARA &&
 518         ME_IsInTable(ME_FindItemFwd(run, diParagraphOrEnd)))
 519     {
 520       run = ME_FindItemFwd(run, diRun);
 521       assert(run);
 522     }
 523     for (i = 0; i < 2; i++)
 524     {
 525       while (!(run->member.run.nFlags & MERF_TAB))
 526       {
 527         run = ME_FindItemFwd(run, diRunOrParagraphOrEnd);
 528         if (run->type != diRun)
 529         {
 530           para = run;
 531           if (ME_IsInTable(para))
 532           {
 533             run = ME_FindItemFwd(para, diRun);
 534             assert(run);
 535             editor->pCursors[0].pPara = para;
 536             editor->pCursors[0].pRun = run;
 537             editor->pCursors[0].nOffset = 0;
 538             i = 1;
 539           } else {
 540             /* Insert table row */
 541             para = ME_AppendTableRow(editor, para->member.para.prev_para);
 542             /* Put cursor at the start of the new table row */
 543             editor->pCursors[0].pPara = para;
 544             editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
 545             editor->pCursors[0].nOffset = 0;
 546             editor->pCursors[1] = editor->pCursors[0];
 547             ME_WrapMarkedParagraphs(editor);
 548             return;
 549           }
 550         }
 551       }
 552       if (i == 0)
 553         run = ME_FindItemFwd(run, diRun);
 554       editor->pCursors[i].pRun = run;
 555       editor->pCursors[i].pPara = ME_GetParagraph(run);
 556       editor->pCursors[i].nOffset = 0;
 557     }
 558   }
 559 }
 560
 561
 562 void ME_TabPressedInTable(ME_TextEditor *editor, BOOL bSelectedRow)
 563 {
 564   /* FIXME: Shift tab should move to the previous cell. */
 565   ME_Cursor fromCursor, toCursor;
 566   ME_InvalidateSelection(editor);
 567   {
 568     int from, to;
 569     from = ME_GetCursorOfs(&editor->pCursors[0]);
 570     to = ME_GetCursorOfs(&editor->pCursors[1]);
 571     if (from <= to)
 572     {
 573       fromCursor = editor->pCursors[0];
 574       toCursor = editor->pCursors[1];
 575     } else {
 576       fromCursor = editor->pCursors[1];
 577       toCursor = editor->pCursors[0];
 578     }
 579   }
 580   if (!editor->bEmulateVersion10) /* v4.1 */
 581   {
 582     if (!ME_IsInTable(toCursor.pRun))
 583     {
 584       editor->pCursors[0] = toCursor;
 585       editor->pCursors[1] = toCursor;
 586     } else {
 587       ME_SelectOrInsertNextCell(editor, toCursor.pRun);
 588     }
 589   } else { /* v1.0 - 3.0 */
 590     if (!ME_IsInTable(fromCursor.pRun)) {
 591       editor->pCursors[0] = fromCursor;
 592       editor->pCursors[1] = fromCursor;
 593       /* FIXME: For some reason the caret is shown at the start of the
 594        *        previous paragraph in v1.0 to v3.0, and bCaretAtEnd only works
 595        *        within the paragraph for wrapped lines. */
 596       if (ME_FindItemBack(fromCursor.pRun, diRun))
 597         editor->bCaretAtEnd = TRUE;
 598     } else if ((bSelectedRow || !ME_IsInTable(toCursor.pRun))) {
 599       ME_SelectOrInsertNextCell(editor, fromCursor.pRun);
 600     } else {
 601       if (ME_IsSelection(editor) && !toCursor.nOffset)
 602       {
 603         ME_DisplayItem *run;
 604         run = ME_FindItemBack(toCursor.pRun, diRunOrParagraphOrEnd);
 605         if (run->type == diRun && run->member.run.nFlags & MERF_TAB)
 606           ME_SelectOrInsertNextCell(editor, run);
 607         else
 608           ME_SelectOrInsertNextCell(editor, toCursor.pRun);
 609       } else {
 610         ME_SelectOrInsertNextCell(editor, toCursor.pRun);
 611       }
 612     }
 613   }
 614   ME_InvalidateSelection(editor);
 615   ME_Repaint(editor);
 616   ITextHost_TxShowCaret(editor->texthost, FALSE);
 617   ME_ShowCaret(editor);
 618   ME_SendSelChange(editor);
 619 }
 620
 621 /* Make sure the cursor is not in the hidden table row start paragraph
 622  * without a selection. */
 623 void ME_MoveCursorFromTableRowStartParagraph(ME_TextEditor *editor)
 624 {
 625   ME_DisplayItem *para = editor->pCursors[0].pPara;
 626   if (para == editor->pCursors[1].pPara &&
 627       para->member.para.nFlags & MEPF_ROWSTART) {
 628     /* The cursors should not be at the hidden start row paragraph without
 629      * a selection, so the cursor is moved into the first cell. */
 630     para = para->member.para.next_para;
 631     editor->pCursors[0].pPara = para;
 632     editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
 633     editor->pCursors[0].nOffset = 0;
 634     editor->pCursors[1] = editor->pCursors[0];
 635   }
 636 }
 637
 638 struct RTFTable *ME_MakeTableDef(ME_TextEditor *editor)
 639 {
 640   RTFTable *tableDef = ALLOC_OBJ(RTFTable);
 641   ZeroMemory(tableDef, sizeof(RTFTable));
 642   if (!editor->bEmulateVersion10) /* v4.1 */
 643     tableDef->gapH = 10;
 644   return tableDef;
 645 }
 646
 647 void ME_InitTableDef(ME_TextEditor *editor, struct RTFTable *tableDef)
 648 {
 649   ZeroMemory(tableDef->cells, sizeof(tableDef->cells));
 650   ZeroMemory(tableDef->border, sizeof(tableDef->border));
 651   tableDef->numCellsDefined = 0;
 652   tableDef->leftEdge = 0;
 653   if (!editor->bEmulateVersion10) /* v4.1 */
 654     tableDef->gapH = 10;
 655   else /* v1.0 - 3.0 */
 656     tableDef->gapH = 0;
 657 }