dlls/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;
  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
 105   assert(run->type == diRun);
 106
 107   run_para = ME_GetParagraph(run);
 108   assert(run_para->member.para.pFmt->cbSize == sizeof(PARAFORMAT2));
 109
 110   ofs = end_run->member.run.nCharOfs = run->member.run.nCharOfs;
 111   next_para = run_para->member.para.next_para;
 112   assert(next_para == ME_FindItemFwd(run_para, diParagraphOrEnd));
 113
 114   undo = ME_AddUndoItem(editor, diUndoJoinParagraphs, NULL);
 115   if (undo)
 116     undo->nStart = run_para->member.para.nCharOfs + ofs;
 117
 118   /* the new paragraph will have a different starting offset, so let's update its runs */
 119   pp = run;
 120   while(pp->type == diRun) {
 121     pp->member.run.nCharOfs -= ofs;
 122     pp = ME_FindItemFwd(pp, diRunOrParagraphOrEnd);
 123   }
 124   new_para->member.para.nCharOfs = ME_GetParagraph(run)->member.para.nCharOfs+ofs;
 125   new_para->member.para.nCharOfs += 1;
 126
 127   new_para->member.para.nFlags = MEPF_REWRAP; /* FIXME copy flags (if applicable) */
 128   /* FIXME initialize format style and call ME_SetParaFormat blah blah */
 129   CopyMemory(new_para->member.para.pFmt, run_para->member.para.pFmt, sizeof(PARAFORMAT2));
 130
 131   /* FIXME remove this as soon as nLeftMargin etc are replaced with proper fields of PARAFORMAT2 */
 132   new_para->member.para.nLeftMargin = run_para->member.para.nLeftMargin;
 133   new_para->member.para.nRightMargin = run_para->member.para.nRightMargin;
 134   new_para->member.para.nFirstMargin = run_para->member.para.nFirstMargin;
 135
 136   /* insert paragraph into paragraph double linked list */
 137   new_para->member.para.prev_para = run_para;
 138   new_para->member.para.next_para = next_para;
 139   run_para->member.para.next_para = new_para;
 140   next_para->member.para.prev_para = new_para;
 141
 142   /* insert end run of the old paragraph, and new paragraph, into DI double linked list */
 143   ME_InsertBefore(run, new_para);
 144   ME_InsertBefore(new_para, end_run);
 145
 146   /* force rewrap of the */
 147   run_para->member.para.prev_para->member.para.nFlags |= MEPF_REWRAP;
 148   new_para->member.para.prev_para->member.para.nFlags |= MEPF_REWRAP;
 149
 150   /* we've added the end run, so we need to modify nCharOfs in the next paragraphs */
 151   ME_PropagateCharOffset(next_para, 1);
 152   editor->nParagraphs++;
 153
 154   return new_para;
 155 }
 156
 157 /* join tp with tp->member.para.next_para, keeping tp's style; this
 158  * is consistent with the original */
 159 ME_DisplayItem *ME_JoinParagraphs(ME_TextEditor *editor, ME_DisplayItem *tp)
 160 {
 161   ME_DisplayItem *pNext, *pFirstRunInNext, *pRun, *pTmp;
 162   int i, shift;
 163   ME_UndoItem *undo = NULL;
 164
 165   assert(tp->type == diParagraph);
 166   assert(tp->member.para.next_para);
 167   assert(tp->member.para.next_para->type == diParagraph);
 168
 169   pNext = tp->member.para.next_para;
 170
 171   {
 172     /* null char format operation to store the original char format for the ENDPARA run */
 173     CHARFORMAT2W fmt;
 174     ME_InitCharFormat2W(&fmt);
 175     ME_SetCharFormat(editor, pNext->member.para.nCharOfs-1, 1, &fmt);
 176   }
 177   undo = ME_AddUndoItem(editor, diUndoSplitParagraph, NULL);
 178   if (undo)
 179   {
 180     undo->nStart = pNext->member.para.nCharOfs-1;
 181     assert(pNext->member.para.pFmt->cbSize == sizeof(PARAFORMAT2));
 182     CopyMemory(undo->di.member.para.pFmt, pNext->member.para.pFmt, sizeof(PARAFORMAT2));
 183   }
 184
 185   shift = pNext->member.para.nCharOfs - tp->member.para.nCharOfs - 1;
 186
 187   pRun = ME_FindItemBack(pNext, diRunOrParagraph);
 188   pFirstRunInNext = ME_FindItemFwd(pNext, diRunOrParagraph);
 189
 190   assert(pRun);
 191   assert(pRun->type == diRun);
 192   assert(pRun->member.run.nFlags & MERF_ENDPARA);
 193   assert(pFirstRunInNext->type == diRun);
 194
 195   /* if some cursor points at end of paragraph, make it point to the first
 196      run of the next joined paragraph */
 197   for (i=0; i<editor->nCursors; i++) {
 198     if (editor->pCursors[i].pRun == pRun) {
 199       editor->pCursors[i].pRun = pFirstRunInNext;
 200       editor->pCursors[i].nOffset = 0;
 201     }
 202   }
 203
 204   pTmp = pNext;
 205   do {
 206     pTmp = ME_FindItemFwd(pTmp, diRunOrParagraphOrEnd);
 207     if (pTmp->type != diRun)
 208       break;
 209     TRACE("shifting \"%s\" by %d (previous %d)\n", debugstr_w(pTmp->member.run.strText->szData), shift, pTmp->member.run.nCharOfs);
 210     pTmp->member.run.nCharOfs += shift;
 211   } while(1);
 212
 213   ME_Remove(pRun);
 214   ME_DestroyDisplayItem(pRun);
 215
 216   tp->member.para.next_para = pNext->member.para.next_para;
 217   pNext->member.para.next_para->member.para.prev_para = tp;
 218   ME_Remove(pNext);
 219   ME_DestroyDisplayItem(pNext);
 220
 221   ME_PropagateCharOffset(tp->member.para.next_para, -1);
 222
 223   ME_CheckCharOffsets(editor);
 224
 225   editor->nParagraphs--;
 226   tp->member.para.nFlags |= MEPF_REWRAP;
 227   return tp;
 228 }
 229
 230 ME_DisplayItem *ME_GetParagraph(ME_DisplayItem *item) {
 231   return ME_FindItemBackOrHere(item, diParagraph);
 232 }
 233
 234 static void ME_DumpStyleEffect(char **p, const char *name, PARAFORMAT2 *fmt, int mask)
 235 {
 236   *p += sprintf(*p, "%-22s%s\n", name, (fmt->dwMask & mask) ? ((fmt->wEffects & mask) ? "yes" : "no") : "N/A");
 237 }
 238
 239 void ME_DumpParaStyleToBuf(PARAFORMAT2 *pFmt, char buf[2048])
 240 {
 241   /* FIXME only PARAFORMAT styles implemented */
 242   char *p;
 243   p = buf;
 244   p += sprintf(p, "Alignment:            %s\n",
 245     !(pFmt->dwMask & PFM_ALIGNMENT) ? "N/A" :
 246       ((pFmt->wAlignment == PFA_LEFT) ? "left" :
 247         ((pFmt->wAlignment == PFA_RIGHT) ? "right" :
 248           ((pFmt->wAlignment == PFA_CENTER) ? "center" :
 249             /*((pFmt->wAlignment == PFA_JUSTIFY) ? "justify" : "incorrect")*/
 250             "incorrect"))));
 251
 252   if (pFmt->dwMask & PFM_OFFSET)
 253     p += sprintf(p, "Offset:               %d\n", (int)pFmt->dxOffset);
 254   else
 255     p += sprintf(p, "Offset:               N/A\n");
 256
 257   if (pFmt->dwMask & PFM_OFFSETINDENT)
 258     p += sprintf(p, "Offset indent:        %d\n", (int)pFmt->dxStartIndent);
 259   else
 260     p += sprintf(p, "Offset indent:        N/A\n");
 261
 262   if (pFmt->dwMask & PFM_STARTINDENT)
 263     p += sprintf(p, "Start indent:         %d\n", (int)pFmt->dxStartIndent);
 264   else
 265     p += sprintf(p, "Start indent:         N/A\n");
 266
 267   if (pFmt->dwMask & PFM_RIGHTINDENT)
 268     p += sprintf(p, "Right indent:         %d\n", (int)pFmt->dxRightIndent);
 269   else
 270     p += sprintf(p, "Right indent:         N/A\n");
 271
 272   ME_DumpStyleEffect(&p, "Page break before:", pFmt, PFM_PAGEBREAKBEFORE);
 273 }
 274
 275 void ME_SetParaFormat(ME_TextEditor *editor, ME_DisplayItem *para, PARAFORMAT2 *pFmt)
 276 {
 277   PARAFORMAT2 copy;
 278   assert(sizeof(*para->member.para.pFmt) == sizeof(PARAFORMAT2));
 279   ME_AddUndoItem(editor, diUndoSetParagraphFormat, para);
 280
 281   CopyMemory(&copy, para->member.para.pFmt, sizeof(PARAFORMAT2));
 282
 283   if (pFmt->dwMask & PFM_ALIGNMENT)
 284     para->member.para.pFmt->wAlignment = pFmt->wAlignment;
 285
 286   /* FIXME to be continued (indents, bulleting and such) */
 287
 288   if (memcmp(&copy, para->member.para.pFmt, sizeof(PARAFORMAT2)))
 289     para->member.para.nFlags |= MEPF_REWRAP;
 290 }
 291
 292 void ME_SetSelectionParaFormat(ME_TextEditor *editor, PARAFORMAT2 *pFmt)
 293 {
 294   int nFrom, nTo;
 295   ME_DisplayItem *para, *para_end, *run;
 296   int nOffset;
 297
 298   ME_GetSelection(editor, &nFrom, &nTo);
 299   if (nTo>nFrom) /* selection consists of chars from nFrom up to nTo-1 */
 300     nTo--;
 301
 302   ME_RunOfsFromCharOfs(editor, nFrom, &run, &nOffset);
 303   para = ME_GetParagraph(run);
 304   ME_RunOfsFromCharOfs(editor, nTo, &run, &nOffset);
 305   para_end = ME_GetParagraph(run);
 306
 307   do {
 308     ME_SetParaFormat(editor, para, pFmt);
 309     if (para == para_end)
 310       break;
 311     para = para->member.para.next_para;
 312   } while(1);
 313 }
 314
 315 void ME_GetParaFormat(ME_TextEditor *editor, ME_DisplayItem *para, PARAFORMAT2 *pFmt)
 316 {
 317   if (pFmt->cbSize >= sizeof(PARAFORMAT2))
 318   {
 319     CopyMemory(pFmt, para->member.para.pFmt, sizeof(PARAFORMAT2));
 320     return;
 321   }
 322   CopyMemory(pFmt, para->member.para.pFmt, pFmt->cbSize);
 323 }
 324
 325 void ME_GetSelectionParaFormat(ME_TextEditor *editor, PARAFORMAT2 *pFmt)
 326 {
 327   int nFrom, nTo;
 328   ME_DisplayItem *para, *para_end, *run;
 329   int nOffset;
 330   PARAFORMAT2 tmp;
 331
 332   ME_GetSelection(editor, &nFrom, &nTo);
 333   if (nTo>nFrom) /* selection consists of chars from nFrom up to nTo-1 */
 334     nTo--;
 335
 336   ME_RunOfsFromCharOfs(editor, nFrom, &run, &nOffset);
 337   para = ME_GetParagraph(run);
 338   ME_RunOfsFromCharOfs(editor, nTo, &run, &nOffset);
 339   para_end = ME_GetParagraph(run);
 340
 341   ME_GetParaFormat(editor, para, pFmt);
 342   if (para == para_end) return;
 343
 344   do {
 345     ZeroMemory(&tmp, sizeof(tmp));
 346     tmp.cbSize = sizeof(tmp);
 347     ME_GetParaFormat(editor, para, &tmp);
 348     assert(tmp.dwMask & PFM_ALIGNMENT);
 349
 350     if (pFmt->wAlignment != tmp.wAlignment)
 351       pFmt->dwMask &= ~PFM_ALIGNMENT;
 352
 353     if (para == para_end)
 354       return;
 355     para = para->member.para.next_para;
 356   } while(1);
 357 }