reactos/dll/win32/riched20/para.c

   1 /*
   2  * RichEdit - functions working on paragraphs of text (diParagraph).
   3  *
   4  * Copyright 2004 by Krzysztof Foltman
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "editor.h"
  22
  23 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
  24
  25 static WCHAR wszParagraphSign[] = {0xB6, 0};
  26
  27 void ME_MakeFirstParagraph(HDC hDC, ME_TextBuffer *text)
  28 {
  29   PARAFORMAT2 fmt;
  30   CHARFORMAT2W cf;
  31   LOGFONTW lf;
  32   HFONT hf;
  33   ME_DisplayItem *para = ME_MakeDI(diParagraph);
  34   ME_DisplayItem *run;
  35   ME_Style *style;
  36
  37   hf = (HFONT)GetStockObject(SYSTEM_FONT);
  38   assert(hf);
  39   GetObjectW(hf, sizeof(LOGFONTW), &lf);
  40   ZeroMemory(&cf, sizeof(cf));
  41   cf.cbSize = sizeof(cf);
  42   cf.dwMask = CFM_BACKCOLOR|CFM_COLOR|CFM_FACE|CFM_SIZE|CFM_CHARSET;
  43   cf.dwMask |= CFM_ALLCAPS|CFM_BOLD|CFM_DISABLED|CFM_EMBOSS|CFM_HIDDEN;
  44   cf.dwMask |= CFM_IMPRINT|CFM_ITALIC|CFM_LINK|CFM_OUTLINE|CFM_PROTECTED;
  45   cf.dwMask |= CFM_REVISED|CFM_SHADOW|CFM_SMALLCAPS|CFM_STRIKEOUT;
  46   cf.dwMask |= CFM_SUBSCRIPT|CFM_UNDERLINE;
  47
  48   cf.dwEffects = CFE_AUTOCOLOR | CFE_AUTOBACKCOLOR;
  49   lstrcpyW(cf.szFaceName, lf.lfFaceName);
  50   cf.yHeight=lf.lfHeight*1440/GetDeviceCaps(hDC, LOGPIXELSY);
  51   if (lf.lfWeight>=700) /* FIXME correct weight ? */
  52     cf.dwEffects |= CFE_BOLD;
  53   cf.wWeight = lf.lfWeight;
  54   if (lf.lfItalic) cf.dwEffects |= CFE_ITALIC;
  55   if (lf.lfUnderline) cf.dwEffects |= CFE_UNDERLINE;
  56   if (lf.lfStrikeOut) cf.dwEffects |= CFE_STRIKEOUT;
  57
  58   ZeroMemory(&fmt, sizeof(fmt));
  59   fmt.cbSize = sizeof(fmt);
  60   fmt.dwMask = PFM_ALIGNMENT | PFM_OFFSET | PFM_STARTINDENT | PFM_RIGHTINDENT | PFM_TABSTOPS;
  61
  62   CopyMemory(para->member.para.pFmt, &fmt, sizeof(PARAFORMAT2));
  63
  64   style = ME_MakeStyle(&cf);
  65   text->pDefaultStyle = style;
  66
  67   run = ME_MakeRun(style, ME_MakeString(wszParagraphSign), MERF_ENDPARA);
  68   run->member.run.nCharOfs = 0;
  69
  70   ME_InsertBefore(text->pLast, para);
  71   ME_InsertBefore(text->pLast, run);
  72   para->member.para.prev_para = text->pFirst;
  73   para->member.para.next_para = text->pLast;
  74   text->pFirst->member.para.next_para = para;
  75   text->pLast->member.para.prev_para = para;
  76
  77   text->pLast->member.para.nCharOfs = 1;
  78 }
  79
  80 void ME_MarkAllForWrapping(ME_TextEditor *editor)
  81 {
  82   ME_MarkForWrapping(editor, editor->pBuffer->pFirst->member.para.next_para, editor->pBuffer->pLast);
  83 }
  84
  85 void ME_MarkForWrapping(ME_TextEditor *editor, ME_DisplayItem *first, ME_DisplayItem *last)
  86 {
  87   while(first != last)
  88   {
  89     first->member.para.nFlags |= MEPF_REWRAP;
  90     first = first->member.para.next_para;
  91   }
  92 }
  93
  94 /* split paragraph at the beginning of the run */
  95 ME_DisplayItem *ME_SplitParagraph(ME_TextEditor *editor, ME_DisplayItem *run, ME_Style *style)
  96 {
  97   ME_DisplayItem *next_para = NULL;
  98   ME_DisplayItem *run_para = NULL;
  99   ME_DisplayItem *new_para = ME_MakeDI(diParagraph);
 100   ME_DisplayItem *end_run = ME_MakeRun(style,ME_MakeString(wszParagraphSign), MERF_ENDPARA);
 101   ME_UndoItem *undo = NULL;
 102   int ofs;
 103   ME_DisplayItem *pp;
 104   int end_len = (editor->bEmulateVersion10 ? 2 : 1);
 105
 106   assert(run->type == diRun);
 107
 108   run_para = ME_GetParagraph(run);
 109   assert(run_para->member.para.pFmt->cbSize == sizeof(PARAFORMAT2));
 110
 111   ofs = end_run->member.run.nCharOfs = run->member.run.nCharOfs;
 112   next_para = run_para->member.para.next_para;
 113   assert(next_para == ME_FindItemFwd(run_para, diParagraphOrEnd));
 114
 115   undo = ME_AddUndoItem(editor, diUndoJoinParagraphs, NULL);
 116   if (undo)
 117     undo->nStart = run_para->member.para.nCharOfs + ofs;
 118
 119   /* the new paragraph will have a different starting offset, so let's update its runs */
 120   pp = run;
 121   while(pp->type == diRun) {
 122     pp->member.run.nCharOfs -= ofs;
 123     pp = ME_FindItemFwd(pp, diRunOrParagraphOrEnd);
 124   }
 125   new_para->member.para.nCharOfs = ME_GetParagraph(run)->member.para.nCharOfs+ofs;
 126   new_para->member.para.nCharOfs += end_len;
 127
 128   new_para->member.para.nFlags = MEPF_REWRAP; /* FIXME copy flags (if applicable) */
 129   /* FIXME initialize format style and call ME_SetParaFormat blah blah */
 130   CopyMemory(new_para->member.para.pFmt, run_para->member.para.pFmt, sizeof(PARAFORMAT2));
 131
 132   /* FIXME remove this as soon as nLeftMargin etc are replaced with proper fields of PARAFORMAT2 */
 133   new_para->member.para.nLeftMargin = run_para->member.para.nLeftMargin;
 134   new_para->member.para.nRightMargin = run_para->member.para.nRightMargin;
 135   new_para->member.para.nFirstMargin = run_para->member.para.nFirstMargin;
 136
 137   /* insert paragraph into paragraph double linked list */
 138   new_para->member.para.prev_para = run_para;
 139   new_para->member.para.next_para = next_para;
 140   run_para->member.para.next_para = new_para;
 141   next_para->member.para.prev_para = new_para;
 142
 143   /* insert end run of the old paragraph, and new paragraph, into DI double linked list */
 144   ME_InsertBefore(run, new_para);
 145   ME_InsertBefore(new_para, end_run);
 146
 147   /* force rewrap of the */
 148   run_para->member.para.prev_para->member.para.nFlags |= MEPF_REWRAP;
 149   new_para->member.para.prev_para->member.para.nFlags |= MEPF_REWRAP;
 150
 151   /* we've added the end run, so we need to modify nCharOfs in the next paragraphs */
 152   ME_PropagateCharOffset(next_para, end_len);
 153   editor->nParagraphs++;
 154
 155   return new_para;
 156 }
 157
 158 /* join tp with tp->member.para.next_para, keeping tp's style; this
 159  * is consistent with the original */
 160 ME_DisplayItem *ME_JoinParagraphs(ME_TextEditor *editor, ME_DisplayItem *tp)
 161 {
 162   ME_DisplayItem *pNext, *pFirstRunInNext, *pRun, *pTmp;
 163   int i, shift;
 164   ME_UndoItem *undo = NULL;
 165   int end_len = (editor->bEmulateVersion10 ? 2 : 1);
 166
 167   assert(tp->type == diParagraph);
 168   assert(tp->member.para.next_para);
 169   assert(tp->member.para.next_para->type == diParagraph);
 170
 171   pNext = tp->member.para.next_para;
 172
 173   {
 174     /* null char format operation to store the original char format for the ENDPARA run */
 175     CHARFORMAT2W fmt;
 176     ME_InitCharFormat2W(&fmt);
 177     ME_SetCharFormat(editor, pNext->member.para.nCharOfs - end_len, end_len, &fmt);
 178   }
 179   undo = ME_AddUndoItem(editor, diUndoSplitParagraph, NULL);
 180   if (undo)
 181   {
 182     undo->nStart = pNext->member.para.nCharOfs - end_len;
 183     assert(pNext->member.para.pFmt->cbSize == sizeof(PARAFORMAT2));
 184     CopyMemory(undo->di.member.para.pFmt, pNext->member.para.pFmt, sizeof(PARAFORMAT2));
 185   }
 186
 187   shift = pNext->member.para.nCharOfs - tp->member.para.nCharOfs - end_len;
 188
 189   pRun = ME_FindItemBack(pNext, diRunOrParagraph);
 190   pFirstRunInNext = ME_FindItemFwd(pNext, diRunOrParagraph);
 191
 192   assert(pRun);
 193   assert(pRun->type == diRun);
 194   assert(pRun->member.run.nFlags & MERF_ENDPARA);
 195   assert(pFirstRunInNext->type == diRun);
 196
 197   /* if some cursor points at end of paragraph, make it point to the first
 198      run of the next joined paragraph */
 199   for (i=0; i<editor->nCursors; i++) {
 200     if (editor->pCursors[i].pRun == pRun) {
 201       editor->pCursors[i].pRun = pFirstRunInNext;
 202       editor->pCursors[i].nOffset = 0;
 203     }
 204   }
 205
 206   pTmp = pNext;
 207   do {
 208     pTmp = ME_FindItemFwd(pTmp, diRunOrParagraphOrEnd);
 209     if (pTmp->type != diRun)
 210       break;
 211     TRACE("shifting \"%s\" by %d (previous %d)\n", debugstr_w(pTmp->member.run.strText->szData), shift, pTmp->member.run.nCharOfs);
 212     pTmp->member.run.nCharOfs += shift;
 213   } while(1);
 214
 215   ME_Remove(pRun);
 216   ME_DestroyDisplayItem(pRun);
 217
 218   tp->member.para.next_para = pNext->member.para.next_para;
 219   pNext->member.para.next_para->member.para.prev_para = tp;
 220   ME_Remove(pNext);
 221   ME_DestroyDisplayItem(pNext);
 222
 223   ME_PropagateCharOffset(tp->member.para.next_para, -end_len);
 224
 225   ME_CheckCharOffsets(editor);
 226
 227   editor->nParagraphs--;
 228   tp->member.para.nFlags |= MEPF_REWRAP;
 229   return tp;
 230 }
 231
 232 ME_DisplayItem *ME_GetParagraph(ME_DisplayItem *item) {
 233   return ME_FindItemBackOrHere(item, diParagraph);
 234 }
 235
 236 static void ME_DumpStyleEffect(char **p, const char *name, PARAFORMAT2 *fmt, int mask)
 237 {
 238   *p += sprintf(*p, "%-22s%s\n", name, (fmt->dwMask & mask) ? ((fmt->wEffects & mask) ? "yes" : "no") : "N/A");
 239 }
 240
 241 void ME_DumpParaStyleToBuf(PARAFORMAT2 *pFmt, char buf[2048])
 242 {
 243   /* FIXME only PARAFORMAT styles implemented */
 244   char *p;
 245   p = buf;
 246   p += sprintf(p, "Alignment:            %s\n",
 247     !(pFmt->dwMask & PFM_ALIGNMENT) ? "N/A" :
 248       ((pFmt->wAlignment == PFA_LEFT) ? "left" :
 249         ((pFmt->wAlignment == PFA_RIGHT) ? "right" :
 250           ((pFmt->wAlignment == PFA_CENTER) ? "center" :
 251             /*((pFmt->wAlignment == PFA_JUSTIFY) ? "justify" : "incorrect")*/
 252             "incorrect"))));
 253
 254   if (pFmt->dwMask & PFM_OFFSET)
 255     p += sprintf(p, "Offset:               %d\n", (int)pFmt->dxOffset);
 256   else
 257     p += sprintf(p, "Offset:               N/A\n");
 258
 259   if (pFmt->dwMask & PFM_OFFSETINDENT)
 260     p += sprintf(p, "Offset indent:        %d\n", (int)pFmt->dxStartIndent);
 261   else
 262     p += sprintf(p, "Offset indent:        N/A\n");
 263
 264   if (pFmt->dwMask & PFM_STARTINDENT)
 265     p += sprintf(p, "Start indent:         %d\n", (int)pFmt->dxStartIndent);
 266   else
 267     p += sprintf(p, "Start indent:         N/A\n");
 268
 269   if (pFmt->dwMask & PFM_RIGHTINDENT)
 270     p += sprintf(p, "Right indent:         %d\n", (int)pFmt->dxRightIndent);
 271   else
 272     p += sprintf(p, "Right indent:         N/A\n");
 273
 274   ME_DumpStyleEffect(&p, "Page break before:", pFmt, PFM_PAGEBREAKBEFORE);
 275 }
 276
 277 void ME_SetParaFormat(ME_TextEditor *editor, ME_DisplayItem *para, PARAFORMAT2 *pFmt)
 278 {
 279   PARAFORMAT2 copy;
 280   assert(sizeof(*para->member.para.pFmt) == sizeof(PARAFORMAT2));
 281   ME_AddUndoItem(editor, diUndoSetParagraphFormat, para);
 282
 283   CopyMemory(&copy, para->member.para.pFmt, sizeof(PARAFORMAT2));
 284
 285   if (pFmt->dwMask & PFM_ALIGNMENT)
 286     para->member.para.pFmt->wAlignment = pFmt->wAlignment;
 287   if (pFmt->dwMask & PFM_STARTINDENT)
 288     para->member.para.pFmt->dxStartIndent = pFmt->dxStartIndent;
 289   if (pFmt->dwMask & PFM_OFFSET)
 290     para->member.para.pFmt->dxOffset = pFmt->dxOffset;
 291   if (pFmt->dwMask & PFM_OFFSETINDENT)
 292     para->member.para.pFmt->dxStartIndent += pFmt->dxStartIndent;
 293
 294   if (pFmt->dwMask & PFM_TABSTOPS)
 295   {
 296     para->member.para.pFmt->cTabCount = pFmt->cTabCount;
 297     memcpy(para->member.para.pFmt->rgxTabs, pFmt->rgxTabs, pFmt->cTabCount*sizeof(int));
 298   }
 299
 300   /* FIXME to be continued (indents, bulleting and such) */
 301
 302   if (memcmp(&copy, para->member.para.pFmt, sizeof(PARAFORMAT2)))
 303     para->member.para.nFlags |= MEPF_REWRAP;
 304 }
 305
 306 void ME_SetSelectionParaFormat(ME_TextEditor *editor, PARAFORMAT2 *pFmt)
 307 {
 308   int nFrom, nTo;
 309   ME_DisplayItem *para, *para_end, *run;
 310   int nOffset;
 311
 312   ME_GetSelection(editor, &nFrom, &nTo);
 313   if (nTo>nFrom) /* selection consists of chars from nFrom up to nTo-1 */
 314     nTo--;
 315
 316   ME_RunOfsFromCharOfs(editor, nFrom, &run, &nOffset);
 317   para = ME_GetParagraph(run);
 318   ME_RunOfsFromCharOfs(editor, nTo, &run, &nOffset);
 319   para_end = ME_GetParagraph(run);
 320
 321   do {
 322     ME_SetParaFormat(editor, para, pFmt);
 323     if (para == para_end)
 324       break;
 325     para = para->member.para.next_para;
 326   } while(1);
 327 }
 328
 329 void ME_GetParaFormat(ME_TextEditor *editor, ME_DisplayItem *para, PARAFORMAT2 *pFmt)
 330 {
 331   if (pFmt->cbSize >= sizeof(PARAFORMAT2))
 332   {
 333     CopyMemory(pFmt, para->member.para.pFmt, sizeof(PARAFORMAT2));
 334     return;
 335   }
 336   CopyMemory(pFmt, para->member.para.pFmt, pFmt->cbSize);
 337 }
 338
 339 void ME_GetSelectionParaFormat(ME_TextEditor *editor, PARAFORMAT2 *pFmt)
 340 {
 341   int nFrom, nTo;
 342   ME_DisplayItem *para, *para_end, *run;
 343   int nOffset;
 344   PARAFORMAT2 tmp;
 345
 346   ME_GetSelection(editor, &nFrom, &nTo);
 347   if (nTo>nFrom) /* selection consists of chars from nFrom up to nTo-1 */
 348     nTo--;
 349
 350   ME_RunOfsFromCharOfs(editor, nFrom, &run, &nOffset);
 351   para = ME_GetParagraph(run);
 352   ME_RunOfsFromCharOfs(editor, nTo, &run, &nOffset);
 353   para_end = ME_GetParagraph(run);
 354
 355   ME_GetParaFormat(editor, para, pFmt);
 356   if (para == para_end) return;
 357
 358   do {
 359     ZeroMemory(&tmp, sizeof(tmp));
 360     tmp.cbSize = sizeof(tmp);
 361     ME_GetParaFormat(editor, para, &tmp);
 362
 363     assert(tmp.dwMask & PFM_ALIGNMENT);
 364     if (pFmt->wAlignment != tmp.wAlignment)
 365       pFmt->dwMask &= ~PFM_ALIGNMENT;
 366
 367     assert(tmp.dwMask & PFM_STARTINDENT);
 368     if (pFmt->dxStartIndent != tmp.dxStartIndent)
 369       pFmt->dwMask &= ~PFM_STARTINDENT;
 370
 371     assert(tmp.dwMask & PFM_OFFSET);
 372     if (pFmt->dxOffset != tmp.dxOffset)
 373       pFmt->dwMask &= ~PFM_OFFSET;
 374
 375     assert(tmp.dwMask & PFM_TABSTOPS);
 376     if (pFmt->dwMask & PFM_TABSTOPS) {
 377       if (pFmt->cTabCount != tmp.cTabCount)
 378         pFmt->dwMask &= ~PFM_TABSTOPS;
 379       else
 380       if (memcmp(pFmt->rgxTabs, tmp.rgxTabs, tmp.cTabCount*sizeof(int)))
 381         pFmt->dwMask &= ~PFM_TABSTOPS;
 382     }
 383
 384     if (para == para_end)
 385       return;
 386     para = para->member.para.next_para;
 387   } while(1);
 388 }