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