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 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 /* 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, ME_Cursor *c, int *nChars)
 277 {
 278   int nOfs = ME_GetCursorOfs(c);
 279   ME_Cursor c2 = *c;
 280   ME_DisplayItem *this_para = c->pPara;
 281   ME_DisplayItem *end_para;
 282
 283   ME_MoveCursorChars(editor, &c2, *nChars);
 284   end_para = c2.pPara;
 285   if (c2.pRun->member.run.nFlags & MERF_ENDPARA) {
 286     /* End offset might be in the middle of the end paragraph run.
 287      * If this is the case, then we need to use the next paragraph as the last
 288      * paragraphs.
 289      */
 290     int remaining = nOfs + *nChars - c2.pRun->member.run.nCharOfs
 291                     - end_para->member.para.nCharOfs;
 292     if (remaining)
 293     {
 294       assert(remaining < c2.pRun->member.run.strText->nLen);
 295       end_para = end_para->member.para.next_para;
 296     }
 297   }
 298   if (!editor->bEmulateVersion10) { /* v4.1 */
 299     if (this_para->member.para.pCell != end_para->member.para.pCell ||
 300         ((this_para->member.para.nFlags|end_para->member.para.nFlags)
 301          & (MEPF_ROWSTART|MEPF_ROWEND)))
 302     {
 303       while (this_para != end_para)
 304       {
 305         ME_DisplayItem *next_para = this_para->member.para.next_para;
 306         BOOL bTruancateDeletion = FALSE;
 307         if (this_para->member.para.nFlags & MEPF_ROWSTART) {
 308           /* The following while loop assumes that next_para is MEPF_ROWSTART,
 309            * so moving back one paragraph let's it be processed as the start
 310            * of the row. */
 311           next_para = this_para;
 312           this_para = this_para->member.para.prev_para;
 313         } else if (next_para->member.para.pCell != this_para->member.para.pCell
 314                    || this_para->member.para.nFlags & MEPF_ROWEND)
 315         {
 316           /* Start of the deletion from after the start of the table row. */
 317           bTruancateDeletion = TRUE;
 318         }
 319         while (!bTruancateDeletion &&
 320                next_para->member.para.nFlags & MEPF_ROWSTART)
 321         {
 322           next_para = ME_GetTableRowEnd(next_para)->member.para.next_para;
 323           if (next_para->member.para.nCharOfs > nOfs + *nChars)
 324           {
 325             /* End of deletion is not past the end of the table row. */
 326             next_para = this_para->member.para.next_para;
 327             /* Delete the end paragraph preceding the table row if the
 328              * preceding table row will be empty. */
 329             if (this_para->member.para.nCharOfs >= nOfs)
 330             {
 331               next_para = next_para->member.para.next_para;
 332             }
 333             bTruancateDeletion = TRUE;
 334           } else {
 335             this_para = next_para->member.para.prev_para;
 336           }
 337         }
 338         if (bTruancateDeletion)
 339         {
 340           ME_Run *end_run = &ME_FindItemBack(next_para, diRun)->member.run;
 341           int nCharsNew = (next_para->member.para.nCharOfs - nOfs
 342                            - end_run->strText->nLen);
 343           nCharsNew = max(nCharsNew, 0);
 344           assert(nCharsNew <= *nChars);
 345           *nChars = nCharsNew;
 346           break;
 347         }
 348         this_para = next_para;
 349       }
 350     }
 351   } else { /* v1.0 - 3.0 */
 352     ME_DisplayItem *pRun;
 353     int nCharsToBoundary;
 354
 355     if ((this_para->member.para.nCharOfs != nOfs || this_para == end_para) &&
 356         this_para->member.para.pFmt->dwMask & PFM_TABLE &&
 357         this_para->member.para.pFmt->wEffects & PFE_TABLE)
 358     {
 359       pRun = c->pRun;
 360       /* Find the next tab or end paragraph to use as a delete boundary */
 361       while (!(pRun->member.run.nFlags & (MERF_TAB|MERF_ENDPARA)))
 362         pRun = ME_FindItemFwd(pRun, diRun);
 363       nCharsToBoundary = pRun->member.run.nCharOfs
 364                          - c->pRun->member.run.nCharOfs
 365                          - c->nOffset;
 366       *nChars = min(*nChars, nCharsToBoundary);
 367     } else if (end_para->member.para.pFmt->dwMask & PFM_TABLE &&
 368                end_para->member.para.pFmt->wEffects & PFE_TABLE)
 369     {
 370       /* The deletion starts from before the row, so don't join it with
 371        * previous non-empty paragraphs. */
 372       ME_DisplayItem *curPara;
 373       pRun = NULL;
 374       if (nOfs > this_para->member.para.nCharOfs) {
 375         pRun = ME_FindItemBack(end_para, diRun);
 376         curPara = end_para->member.para.prev_para;
 377       }
 378       if (!pRun) {
 379         pRun = ME_FindItemFwd(end_para, diRun);
 380         curPara = end_para;
 381       }
 382       if (pRun)
 383       {
 384         nCharsToBoundary = curPara->member.para.nCharOfs
 385                            + pRun->member.run.nCharOfs
 386                            - nOfs;
 387         if (nCharsToBoundary >= 0)
 388           *nChars = min(*nChars, nCharsToBoundary);
 389       }
 390     }
 391     if (*nChars < 0)
 392       nChars = 0;
 393   }
 394 }
 395
 396 ME_DisplayItem* ME_AppendTableRow(ME_TextEditor *editor,
 397                                   ME_DisplayItem *table_row)
 398 {
 399   WCHAR endl = '\r', tab = '\t';
 400   ME_DisplayItem *run;
 401   PARAFORMAT2 *pFmt;
 402   int i;
 403
 404   assert(table_row);
 405   assert(table_row->type == diParagraph);
 406   if (!editor->bEmulateVersion10) { /* v4.1 */
 407     ME_DisplayItem *insertedCell, *para, *cell, *prevTableEnd;
 408     cell = ME_FindItemFwd(ME_GetTableRowStart(table_row), diCell);
 409     prevTableEnd = ME_GetTableRowEnd(table_row);
 410     para = prevTableEnd->member.para.next_para;
 411     run = ME_FindItemFwd(para, diRun);
 412     editor->pCursors[0].pPara = para;
 413     editor->pCursors[0].pRun = run;
 414     editor->pCursors[0].nOffset = 0;
 415     editor->pCursors[1] = editor->pCursors[0];
 416     para = ME_InsertTableRowStartFromCursor(editor);
 417     insertedCell = ME_FindItemFwd(para, diCell);
 418     /* Copy cell properties */
 419     insertedCell->member.cell.nRightBoundary = cell->member.cell.nRightBoundary;
 420     insertedCell->member.cell.border = cell->member.cell.border;
 421     while (cell->member.cell.next_cell) {
 422       cell = cell->member.cell.next_cell;
 423       para = ME_InsertTableCellFromCursor(editor);
 424       insertedCell = ME_FindItemBack(para, diCell);
 425       /* Copy cell properties */
 426       insertedCell->member.cell.nRightBoundary = cell->member.cell.nRightBoundary;
 427       insertedCell->member.cell.border = cell->member.cell.border;
 428     };
 429     para = ME_InsertTableRowEndFromCursor(editor);
 430     *para->member.para.pFmt = *prevTableEnd->member.para.pFmt;
 431     /* return the table row start for the inserted paragraph */
 432     return ME_FindItemFwd(cell, diParagraph)->member.para.next_para;
 433   } else { /* v1.0 - 3.0 */
 434     run = ME_FindItemBack(table_row->member.para.next_para, diRun);
 435     pFmt = table_row->member.para.pFmt;
 436     assert(pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE);
 437     editor->pCursors[0].pPara = table_row;
 438     editor->pCursors[0].pRun = run;
 439     editor->pCursors[0].nOffset = 0;
 440     editor->pCursors[1] = editor->pCursors[0];
 441     ME_InsertTextFromCursor(editor, 0, &endl, 1, run->member.run.style);
 442     run = editor->pCursors[0].pRun;
 443     for (i = 0; i < pFmt->cTabCount; i++) {
 444       ME_InsertTextFromCursor(editor, 0, &tab, 1, run->member.run.style);
 445     }
 446     return table_row->member.para.next_para;
 447   }
 448 }
 449
 450 /* Selects the next table cell or appends a new table row if at end of table */
 451 static void ME_SelectOrInsertNextCell(ME_TextEditor *editor,
 452                                       ME_DisplayItem *run)
 453 {
 454   ME_DisplayItem *para = ME_GetParagraph(run);
 455   int i;
 456
 457   assert(run && run->type == diRun);
 458   assert(ME_IsInTable(run));
 459   if (!editor->bEmulateVersion10) { /* v4.1 */
 460     ME_DisplayItem *cell;
 461     /* Get the initial cell */
 462     if (para->member.para.nFlags & MEPF_ROWSTART) {
 463       cell = para->member.para.next_para->member.para.pCell;
 464     } else if (para->member.para.nFlags & MEPF_ROWEND) {
 465       cell = para->member.para.prev_para->member.para.pCell;
 466     } else {
 467       cell = para->member.para.pCell;
 468     }
 469     assert(cell);
 470     /* Get the next cell. */
 471     if (cell->member.cell.next_cell &&
 472         cell->member.cell.next_cell->member.cell.next_cell)
 473     {
 474       cell = cell->member.cell.next_cell;
 475     } else {
 476       para = ME_GetTableRowEnd(ME_FindItemFwd(cell, diParagraph));
 477       para = para->member.para.next_para;
 478       assert(para);
 479       if (para->member.para.nFlags & MEPF_ROWSTART) {
 480         cell = para->member.para.next_para->member.para.pCell;
 481       } else {
 482         /* Insert row */
 483         para = para->member.para.prev_para;
 484         para = ME_AppendTableRow(editor, ME_GetTableRowStart(para));
 485         /* Put cursor at the start of the new table row */
 486         para = para->member.para.next_para;
 487         editor->pCursors[0].pPara = para;
 488         editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
 489         editor->pCursors[0].nOffset = 0;
 490         editor->pCursors[1] = editor->pCursors[0];
 491         ME_WrapMarkedParagraphs(editor);
 492         return;
 493       }
 494     }
 495     /* Select cell */
 496     editor->pCursors[1].pRun = ME_FindItemFwd(cell, diRun);
 497     editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
 498     editor->pCursors[1].nOffset = 0;
 499     assert(editor->pCursors[0].pRun);
 500     cell = cell->member.cell.next_cell;
 501     editor->pCursors[0].pRun = ME_FindItemBack(cell, diRun);
 502     editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
 503     editor->pCursors[0].nOffset = 0;
 504     assert(editor->pCursors[1].pRun);
 505   } else { /* v1.0 - 3.0 */
 506     if (run->member.run.nFlags & MERF_ENDPARA &&
 507         ME_IsInTable(ME_FindItemFwd(run, diParagraphOrEnd)))
 508     {
 509       run = ME_FindItemFwd(run, diRun);
 510       assert(run);
 511     }
 512     for (i = 0; i < 2; i++)
 513     {
 514       while (!(run->member.run.nFlags & MERF_TAB))
 515       {
 516         run = ME_FindItemFwd(run, diRunOrParagraphOrEnd);
 517         if (run->type != diRun)
 518         {
 519           para = run;
 520           if (ME_IsInTable(para))
 521           {
 522             run = ME_FindItemFwd(para, diRun);
 523             assert(run);
 524             editor->pCursors[0].pPara = para;
 525             editor->pCursors[0].pRun = run;
 526             editor->pCursors[0].nOffset = 0;
 527             i = 1;
 528           } else {
 529             /* Insert table row */
 530             para = ME_AppendTableRow(editor, para->member.para.prev_para);
 531             /* Put cursor at the start of the new table row */
 532             editor->pCursors[0].pPara = para;
 533             editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
 534             editor->pCursors[0].nOffset = 0;
 535             editor->pCursors[1] = editor->pCursors[0];
 536             ME_WrapMarkedParagraphs(editor);
 537             return;
 538           }
 539         }
 540       }
 541       if (i == 0)
 542         run = ME_FindItemFwd(run, diRun);
 543       editor->pCursors[i].pRun = run;
 544       editor->pCursors[i].pPara = ME_GetParagraph(run);
 545       editor->pCursors[i].nOffset = 0;
 546     }
 547   }
 548 }
 549
 550
 551 void ME_TabPressedInTable(ME_TextEditor *editor, BOOL bSelectedRow)
 552 {
 553   /* FIXME: Shift tab should move to the previous cell. */
 554   ME_Cursor fromCursor, toCursor;
 555   ME_InvalidateSelection(editor);
 556   {
 557     int from, to;
 558     from = ME_GetCursorOfs(&editor->pCursors[0]);
 559     to = ME_GetCursorOfs(&editor->pCursors[1]);
 560     if (from <= to)
 561     {
 562       fromCursor = editor->pCursors[0];
 563       toCursor = editor->pCursors[1];
 564     } else {
 565       fromCursor = editor->pCursors[1];
 566       toCursor = editor->pCursors[0];
 567     }
 568   }
 569   if (!editor->bEmulateVersion10) /* v4.1 */
 570   {
 571     if (!ME_IsInTable(toCursor.pRun))
 572     {
 573       editor->pCursors[0] = toCursor;
 574       editor->pCursors[1] = toCursor;
 575     } else {
 576       ME_SelectOrInsertNextCell(editor, toCursor.pRun);
 577     }
 578   } else { /* v1.0 - 3.0 */
 579     if (!ME_IsInTable(fromCursor.pRun)) {
 580       editor->pCursors[0] = fromCursor;
 581       editor->pCursors[1] = fromCursor;
 582       /* FIXME: For some reason the caret is shown at the start of the
 583        *        previous paragraph in v1.0 to v3.0, and bCaretAtEnd only works
 584        *        within the paragraph for wrapped lines. */
 585       if (ME_FindItemBack(fromCursor.pRun, diRun))
 586         editor->bCaretAtEnd = TRUE;
 587     } else if ((bSelectedRow || !ME_IsInTable(toCursor.pRun))) {
 588       ME_SelectOrInsertNextCell(editor, fromCursor.pRun);
 589     } else {
 590       if (ME_IsSelection(editor) && !toCursor.nOffset)
 591       {
 592         ME_DisplayItem *run;
 593         run = ME_FindItemBack(toCursor.pRun, diRunOrParagraphOrEnd);
 594         if (run->type == diRun && run->member.run.nFlags & MERF_TAB)
 595           ME_SelectOrInsertNextCell(editor, run);
 596         else
 597           ME_SelectOrInsertNextCell(editor, toCursor.pRun);
 598       } else {
 599         ME_SelectOrInsertNextCell(editor, toCursor.pRun);
 600       }
 601     }
 602   }
 603   ME_InvalidateSelection(editor);
 604   ME_Repaint(editor);
 605   ITextHost_TxShowCaret(editor->texthost, FALSE);
 606   ME_ShowCaret(editor);
 607   ME_SendSelChange(editor);
 608 }
 609
 610 /* Make sure the cursor is not in the hidden table row start paragraph
 611  * without a selection. */
 612 void ME_MoveCursorFromTableRowStartParagraph(ME_TextEditor *editor)
 613 {
 614   ME_DisplayItem *para = editor->pCursors[0].pPara;
 615   if (para == editor->pCursors[1].pPara &&
 616       para->member.para.nFlags & MEPF_ROWSTART) {
 617     /* The cursors should not be at the hidden start row paragraph without
 618      * a selection, so the cursor is moved into the first cell. */
 619     para = para->member.para.next_para;
 620     editor->pCursors[0].pPara = para;
 621     editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
 622     editor->pCursors[0].nOffset = 0;
 623     editor->pCursors[1] = editor->pCursors[0];
 624   }
 625 }
 626
 627 struct RTFTable *ME_MakeTableDef(ME_TextEditor *editor)
 628 {
 629   RTFTable *tableDef = ALLOC_OBJ(RTFTable);
 630   ZeroMemory(tableDef, sizeof(RTFTable));
 631   if (!editor->bEmulateVersion10) /* v4.1 */
 632     tableDef->gapH = 10;
 633   return tableDef;
 634 }
 635
 636 void ME_InitTableDef(ME_TextEditor *editor, struct RTFTable *tableDef)
 637 {
 638   ZeroMemory(tableDef->cells, sizeof(tableDef->cells));
 639   ZeroMemory(tableDef->border, sizeof(tableDef->border));
 640   tableDef->numCellsDefined = 0;
 641   tableDef->leftEdge = 0;
 642   if (!editor->bEmulateVersion10) /* v4.1 */
 643     tableDef->gapH = 10;
 644   else /* v1.0 - 3.0 */
 645     tableDef->gapH = 0;
 646 }