dlls/riched20/para.c

   1 /*
   2  * RichEdit - functions working on paragraphs of text (diParagraph).
   3  *
   4  * Copyright 2004 by Krzysztof Foltman
   5  * Copyright 2006 by Phil Krylov
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "editor.h"
  23
  24 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
  25
  26 static const WCHAR wszParagraphSign[] = {0xB6, 0};
  27
  28 void ME_MakeFirstParagraph(HDC hDC, ME_TextBuffer *text)
  29 {
  30   PARAFORMAT2 fmt;
  31   CHARFORMAT2W cf;
  32   LOGFONTW lf;
  33   HFONT hf;
  34   ME_DisplayItem *para = ME_MakeDI(diParagraph);
  35   ME_DisplayItem *run;
  36   ME_Style *style;
  37
  38   hf = (HFONT)GetStockObject(SYSTEM_FONT);
  39   assert(hf);
  40   GetObjectW(hf, sizeof(LOGFONTW), &lf);
  41   ZeroMemory(&cf, sizeof(cf));
  42   cf.cbSize = sizeof(cf);
  43   cf.dwMask = CFM_BACKCOLOR|CFM_COLOR|CFM_FACE|CFM_SIZE|CFM_CHARSET;
  44   cf.dwMask |= CFM_ALLCAPS|CFM_BOLD|CFM_DISABLED|CFM_EMBOSS|CFM_HIDDEN;
  45   cf.dwMask |= CFM_IMPRINT|CFM_ITALIC|CFM_LINK|CFM_OUTLINE|CFM_PROTECTED;
  46   cf.dwMask |= CFM_REVISED|CFM_SHADOW|CFM_SMALLCAPS|CFM_STRIKEOUT;
  47   cf.dwMask |= CFM_SUBSCRIPT|CFM_UNDERLINE;
  48
  49   cf.dwEffects = CFE_AUTOCOLOR | CFE_AUTOBACKCOLOR;
  50   lstrcpyW(cf.szFaceName, lf.lfFaceName);
  51   cf.yHeight=lf.lfHeight*1440/GetDeviceCaps(hDC, LOGPIXELSY);
  52   if (lf.lfWeight>=700) /* FIXME correct weight ? */
  53     cf.dwEffects |= CFE_BOLD;
  54   cf.wWeight = lf.lfWeight;
  55   if (lf.lfItalic) cf.dwEffects |= CFE_ITALIC;
  56   if (lf.lfUnderline) cf.dwEffects |= CFE_UNDERLINE;
  57   if (lf.lfStrikeOut) cf.dwEffects |= CFE_STRIKEOUT;
  58
  59   ZeroMemory(&fmt, sizeof(fmt));
  60   fmt.cbSize = sizeof(fmt);
  61   fmt.dwMask = PFM_ALIGNMENT | PFM_OFFSET | PFM_STARTINDENT | PFM_RIGHTINDENT | PFM_TABSTOPS;
  62
  63   CopyMemory(para->member.para.pFmt, &fmt, sizeof(PARAFORMAT2));
  64
  65   style = ME_MakeStyle(&cf);
  66   text->pDefaultStyle = style;
  67
  68   run = ME_MakeRun(style, ME_MakeString(wszParagraphSign), MERF_ENDPARA);
  69   run->member.run.nCharOfs = 0;
  70
  71   ME_InsertBefore(text->pLast, para);
  72   ME_InsertBefore(text->pLast, run);
  73   para->member.para.prev_para = text->pFirst;
  74   para->member.para.next_para = text->pLast;
  75   text->pFirst->member.para.next_para = para;
  76   text->pLast->member.para.prev_para = para;
  77
  78   text->pLast->member.para.nCharOfs = 1;
  79 }
  80
  81 void ME_MarkAllForWrapping(ME_TextEditor *editor)
  82 {
  83   ME_MarkForWrapping(editor, editor->pBuffer->pFirst->member.para.next_para, editor->pBuffer->pLast);
  84 }
  85
  86 void ME_MarkForWrapping(ME_TextEditor *editor, ME_DisplayItem *first, ME_DisplayItem *last)
  87 {
  88   while(first != last)
  89   {
  90     first->member.para.nFlags |= MEPF_REWRAP;
  91     first = first->member.para.next_para;
  92   }
  93 }
  94
  95 void ME_MarkForPainting(ME_TextEditor *editor, ME_DisplayItem *first, ME_DisplayItem *last)
  96 {
  97   while(first != last)
  98   {
  99     first->member.para.nFlags |= MEPF_REPAINT;
 100     first = first->member.para.next_para;
 101   }
 102 }
 103
 104 /* split paragraph at the beginning of the run */
 105 ME_DisplayItem *ME_SplitParagraph(ME_TextEditor *editor, ME_DisplayItem *run, ME_Style *style)
 106 {
 107   ME_DisplayItem *next_para = NULL;
 108   ME_DisplayItem *run_para = NULL;
 109   ME_DisplayItem *new_para = ME_MakeDI(diParagraph);
 110   ME_DisplayItem *end_run = ME_MakeRun(style,ME_MakeString(wszParagraphSign), MERF_ENDPARA);
 111   ME_UndoItem *undo = NULL;
 112   int ofs;
 113   ME_DisplayItem *pp;
 114   int end_len = (editor->bEmulateVersion10 ? 2 : 1);
 115
 116   assert(run->type == diRun);
 117
 118   run_para = ME_GetParagraph(run);
 119   assert(run_para->member.para.pFmt->cbSize == sizeof(PARAFORMAT2));
 120
 121   ofs = end_run->member.run.nCharOfs = run->member.run.nCharOfs;
 122   next_para = run_para->member.para.next_para;
 123   assert(next_para == ME_FindItemFwd(run_para, diParagraphOrEnd));
 124
 125   undo = ME_AddUndoItem(editor, diUndoJoinParagraphs, NULL);
 126   if (undo)
 127     undo->nStart = run_para->member.para.nCharOfs + ofs;
 128
 129   /* the new paragraph will have a different starting offset, so let's update its runs */
 130   pp = run;
 131   while(pp->type == diRun) {
 132     pp->member.run.nCharOfs -= ofs;
 133     pp = ME_FindItemFwd(pp, diRunOrParagraphOrEnd);
 134   }
 135   new_para->member.para.nCharOfs = ME_GetParagraph(run)->member.para.nCharOfs+ofs;
 136   new_para->member.para.nCharOfs += end_len;
 137
 138   new_para->member.para.nFlags = MEPF_REWRAP; /* FIXME copy flags (if applicable) */
 139   /* FIXME initialize format style and call ME_SetParaFormat blah blah */
 140   CopyMemory(new_para->member.para.pFmt, run_para->member.para.pFmt, sizeof(PARAFORMAT2));
 141
 142   /* FIXME remove this as soon as nLeftMargin etc are replaced with proper fields of PARAFORMAT2 */
 143   new_para->member.para.nLeftMargin = run_para->member.para.nLeftMargin;
 144   new_para->member.para.nRightMargin = run_para->member.para.nRightMargin;
 145   new_para->member.para.nFirstMargin = run_para->member.para.nFirstMargin;
 146
 147   new_para->member.para.bTable = run_para->member.para.bTable;
 148
 149   /* Inherit previous cell definitions if any */
 150   new_para->member.para.pCells = NULL;
 151   if (run_para->member.para.pCells)
 152   {
 153     ME_TableCell *pCell, *pNewCell;
 154
 155     for (pCell = run_para->member.para.pCells; pCell; pCell = pCell->next)
 156     {
 157       pNewCell = ALLOC_OBJ(ME_TableCell);
 158       pNewCell->nRightBoundary = pCell->nRightBoundary;
 159       pNewCell->next = NULL;
 160       if (new_para->member.para.pCells)
 161         new_para->member.para.pLastCell->next = pNewCell;
 162       else
 163         new_para->member.para.pCells = pNewCell;
 164       new_para->member.para.pLastCell = pNewCell;
 165     }
 166   }
 167
 168   /* fix paragraph properties. FIXME only needed when called from RTF reader */
 169   if (run_para->member.para.pCells && !run_para->member.para.bTable)
 170   {
 171     /* Paragraph does not have an \intbl keyword, so any table definition
 172      * stored is invalid */
 173     ME_DestroyTableCellList(run_para);
 174   }
 175
 176   /* insert paragraph into paragraph double linked list */
 177   new_para->member.para.prev_para = run_para;
 178   new_para->member.para.next_para = next_para;
 179   run_para->member.para.next_para = new_para;
 180   next_para->member.para.prev_para = new_para;
 181
 182   /* insert end run of the old paragraph, and new paragraph, into DI double linked list */
 183   ME_InsertBefore(run, new_para);
 184   ME_InsertBefore(new_para, end_run);
 185
 186   /* force rewrap of the */
 187   run_para->member.para.prev_para->member.para.nFlags |= MEPF_REWRAP;
 188   new_para->member.para.prev_para->member.para.nFlags |= MEPF_REWRAP;
 189
 190   /* we've added the end run, so we need to modify nCharOfs in the next paragraphs */
 191   ME_PropagateCharOffset(next_para, end_len);
 192   editor->nParagraphs++;
 193
 194   return new_para;
 195 }
 196
 197 /* join tp with tp->member.para.next_para, keeping tp's style; this
 198  * is consistent with the original */
 199 ME_DisplayItem *ME_JoinParagraphs(ME_TextEditor *editor, ME_DisplayItem *tp)
 200 {
 201   ME_DisplayItem *pNext, *pFirstRunInNext, *pRun, *pTmp;
 202   int i, shift;
 203   ME_UndoItem *undo = NULL;
 204   int end_len = (editor->bEmulateVersion10 ? 2 : 1);
 205
 206   assert(tp->type == diParagraph);
 207   assert(tp->member.para.next_para);
 208   assert(tp->member.para.next_para->type == diParagraph);
 209
 210   pNext = tp->member.para.next_para;
 211
 212   {
 213     /* null char format operation to store the original char format for the ENDPARA run */
 214     CHARFORMAT2W fmt;
 215     ME_InitCharFormat2W(&fmt);
 216     ME_SetCharFormat(editor, pNext->member.para.nCharOfs - end_len, end_len, &fmt);
 217   }
 218   undo = ME_AddUndoItem(editor, diUndoSplitParagraph, NULL);
 219   if (undo)
 220   {
 221     undo->nStart = pNext->member.para.nCharOfs - end_len;
 222     assert(pNext->member.para.pFmt->cbSize == sizeof(PARAFORMAT2));
 223     CopyMemory(undo->di.member.para.pFmt, pNext->member.para.pFmt, sizeof(PARAFORMAT2));
 224   }
 225
 226   shift = pNext->member.para.nCharOfs - tp->member.para.nCharOfs - end_len;
 227
 228   pRun = ME_FindItemBack(pNext, diRunOrParagraph);
 229   pFirstRunInNext = ME_FindItemFwd(pNext, diRunOrParagraph);
 230
 231   assert(pRun);
 232   assert(pRun->type == diRun);
 233   assert(pRun->member.run.nFlags & MERF_ENDPARA);
 234   assert(pFirstRunInNext->type == diRun);
 235
 236   /* if some cursor points at end of paragraph, make it point to the first
 237      run of the next joined paragraph */
 238   for (i=0; i<editor->nCursors; i++) {
 239     if (editor->pCursors[i].pRun == pRun) {
 240       editor->pCursors[i].pRun = pFirstRunInNext;
 241       editor->pCursors[i].nOffset = 0;
 242     }
 243   }
 244
 245   pTmp = pNext;
 246   do {
 247     pTmp = ME_FindItemFwd(pTmp, diRunOrParagraphOrEnd);
 248     if (pTmp->type != diRun)
 249       break;
 250     TRACE("shifting \"%s\" by %d (previous %d)\n", debugstr_w(pTmp->member.run.strText->szData), shift, pTmp->member.run.nCharOfs);
 251     pTmp->member.run.nCharOfs += shift;
 252   } while(1);
 253
 254   ME_Remove(pRun);
 255   ME_DestroyDisplayItem(pRun);
 256
 257   if (editor->pLastSelStartPara == pNext)
 258     editor->pLastSelStartPara = tp;
 259   if (editor->pLastSelEndPara == pNext)
 260     editor->pLastSelEndPara = tp;
 261
 262   tp->member.para.next_para = pNext->member.para.next_para;
 263   pNext->member.para.next_para->member.para.prev_para = tp;
 264   ME_Remove(pNext);
 265   ME_DestroyDisplayItem(pNext);
 266
 267   ME_PropagateCharOffset(tp->member.para.next_para, -end_len);
 268
 269   ME_CheckCharOffsets(editor);
 270
 271   editor->nParagraphs--;
 272   tp->member.para.nFlags |= MEPF_REWRAP;
 273   return tp;
 274 }
 275
 276 ME_DisplayItem *ME_GetParagraph(ME_DisplayItem *item) {
 277   return ME_FindItemBackOrHere(item, diParagraph);
 278 }
 279
 280 static void ME_DumpStyleEffect(char **p, const char *name, PARAFORMAT2 *fmt, int mask)
 281 {
 282   *p += sprintf(*p, "%-22s%s\n", name, (fmt->dwMask & mask) ? ((fmt->wEffects & mask) ? "yes" : "no") : "N/A");
 283 }
 284
 285 void ME_DumpParaStyleToBuf(PARAFORMAT2 *pFmt, char buf[2048])
 286 {
 287   /* FIXME only PARAFORMAT styles implemented */
 288   char *p;
 289   p = buf;
 290   p += sprintf(p, "Alignment:            %s\n",
 291     !(pFmt->dwMask & PFM_ALIGNMENT) ? "N/A" :
 292       ((pFmt->wAlignment == PFA_LEFT) ? "left" :
 293         ((pFmt->wAlignment == PFA_RIGHT) ? "right" :
 294           ((pFmt->wAlignment == PFA_CENTER) ? "center" :
 295             /*((pFmt->wAlignment == PFA_JUSTIFY) ? "justify" : "incorrect")*/
 296             "incorrect"))));
 297
 298   if (pFmt->dwMask & PFM_OFFSET)
 299     p += sprintf(p, "Offset:               %d\n", (int)pFmt->dxOffset);
 300   else
 301     p += sprintf(p, "Offset:               N/A\n");
 302
 303   if (pFmt->dwMask & PFM_OFFSETINDENT)
 304     p += sprintf(p, "Offset indent:        %d\n", (int)pFmt->dxStartIndent);
 305   else
 306     p += sprintf(p, "Offset indent:        N/A\n");
 307
 308   if (pFmt->dwMask & PFM_STARTINDENT)
 309     p += sprintf(p, "Start indent:         %d\n", (int)pFmt->dxStartIndent);
 310   else
 311     p += sprintf(p, "Start indent:         N/A\n");
 312
 313   if (pFmt->dwMask & PFM_RIGHTINDENT)
 314     p += sprintf(p, "Right indent:         %d\n", (int)pFmt->dxRightIndent);
 315   else
 316     p += sprintf(p, "Right indent:         N/A\n");
 317
 318   ME_DumpStyleEffect(&p, "Page break before:", pFmt, PFM_PAGEBREAKBEFORE);
 319 }
 320
 321 void ME_SetParaFormat(ME_TextEditor *editor, ME_DisplayItem *para, PARAFORMAT2 *pFmt)
 322 {
 323   PARAFORMAT2 copy;
 324   assert(sizeof(*para->member.para.pFmt) == sizeof(PARAFORMAT2));
 325   ME_AddUndoItem(editor, diUndoSetParagraphFormat, para);
 326
 327   CopyMemory(&copy, para->member.para.pFmt, sizeof(PARAFORMAT2));
 328
 329   if (pFmt->dwMask & PFM_ALIGNMENT)
 330     para->member.para.pFmt->wAlignment = pFmt->wAlignment;
 331   if (pFmt->dwMask & PFM_STARTINDENT)
 332     para->member.para.pFmt->dxStartIndent = pFmt->dxStartIndent;
 333   if (pFmt->dwMask & PFM_OFFSET)
 334     para->member.para.pFmt->dxOffset = pFmt->dxOffset;
 335   if (pFmt->dwMask & PFM_OFFSETINDENT)
 336     para->member.para.pFmt->dxStartIndent += pFmt->dxStartIndent;
 337
 338   if (pFmt->dwMask & PFM_TABSTOPS)
 339   {
 340     para->member.para.pFmt->cTabCount = pFmt->cTabCount;
 341     memcpy(para->member.para.pFmt->rgxTabs, pFmt->rgxTabs, pFmt->cTabCount*sizeof(int));
 342   }
 343
 344   /* FIXME to be continued (indents, bulleting and such) */
 345
 346   if (memcmp(&copy, para->member.para.pFmt, sizeof(PARAFORMAT2)))
 347     para->member.para.nFlags |= MEPF_REWRAP;
 348 }
 349
 350
 351 void
 352 ME_GetSelectionParas(ME_TextEditor *editor, ME_DisplayItem **para, ME_DisplayItem **para_end)
 353 {
 354   ME_Cursor *pEndCursor = &editor->pCursors[1];
 355
 356   *para = ME_GetParagraph(editor->pCursors[0].pRun);
 357   *para_end = ME_GetParagraph(editor->pCursors[1].pRun);
 358   if ((*para_end)->member.para.nCharOfs < (*para)->member.para.nCharOfs) {
 359     ME_DisplayItem *tmp = *para;
 360
 361     *para = *para_end;
 362     *para_end = tmp;
 363     pEndCursor = &editor->pCursors[0];
 364   }
 365
 366   /* selection consists of chars from nFrom up to nTo-1 */
 367   if ((*para_end)->member.para.nCharOfs > (*para)->member.para.nCharOfs) {
 368     if (!pEndCursor->nOffset) {
 369       *para_end = ME_GetParagraph(ME_FindItemBack(pEndCursor->pRun, diRun));
 370     }
 371   }
 372 }
 373
 374
 375 void ME_SetSelectionParaFormat(ME_TextEditor *editor, PARAFORMAT2 *pFmt)
 376 {
 377   ME_DisplayItem *para, *para_end;
 378
 379   ME_GetSelectionParas(editor, &para, &para_end);
 380
 381   do {
 382     ME_SetParaFormat(editor, para, pFmt);
 383     if (para == para_end)
 384       break;
 385     para = para->member.para.next_para;
 386   } while(1);
 387 }
 388
 389 void ME_GetParaFormat(ME_TextEditor *editor, ME_DisplayItem *para, PARAFORMAT2 *pFmt)
 390 {
 391   if (pFmt->cbSize >= sizeof(PARAFORMAT2))
 392   {
 393     CopyMemory(pFmt, para->member.para.pFmt, sizeof(PARAFORMAT2));
 394     return;
 395   }
 396   CopyMemory(pFmt, para->member.para.pFmt, pFmt->cbSize);
 397 }
 398
 399 void ME_GetSelectionParaFormat(ME_TextEditor *editor, PARAFORMAT2 *pFmt)
 400 {
 401   ME_DisplayItem *para, *para_end;
 402   PARAFORMAT2 tmp;
 403
 404   ME_GetSelectionParas(editor, &para, &para_end);
 405
 406   ME_GetParaFormat(editor, para, pFmt);
 407   if (para == para_end) return;
 408
 409   do {
 410     ZeroMemory(&tmp, sizeof(tmp));
 411     tmp.cbSize = sizeof(tmp);
 412     ME_GetParaFormat(editor, para, &tmp);
 413
 414     assert(tmp.dwMask & PFM_ALIGNMENT);
 415     if (pFmt->wAlignment != tmp.wAlignment)
 416       pFmt->dwMask &= ~PFM_ALIGNMENT;
 417
 418     assert(tmp.dwMask & PFM_STARTINDENT);
 419     if (pFmt->dxStartIndent != tmp.dxStartIndent)
 420       pFmt->dwMask &= ~PFM_STARTINDENT;
 421
 422     assert(tmp.dwMask & PFM_OFFSET);
 423     if (pFmt->dxOffset != tmp.dxOffset)
 424       pFmt->dwMask &= ~PFM_OFFSET;
 425
 426     assert(tmp.dwMask & PFM_TABSTOPS);
 427     if (pFmt->dwMask & PFM_TABSTOPS) {
 428       if (pFmt->cTabCount != tmp.cTabCount)
 429         pFmt->dwMask &= ~PFM_TABSTOPS;
 430       else
 431       if (memcmp(pFmt->rgxTabs, tmp.rgxTabs, tmp.cTabCount*sizeof(int)))
 432         pFmt->dwMask &= ~PFM_TABSTOPS;
 433     }
 434
 435     if (para == para_end)
 436       return;
 437     para = para->member.para.next_para;
 438   } while(1);
 439 }