dlls/riched20/list.c

   1 /*
   2  * RichEdit - Basic operations on double linked lists.
   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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21
  22 #include "editor.h"
  23
  24 WINE_DEFAULT_DEBUG_CHANNEL(richedit_lists);
  25
  26 void ME_InsertBefore(ME_DisplayItem *diWhere, ME_DisplayItem *diWhat)
  27 {
  28   diWhat->next = diWhere;
  29   diWhat->prev = diWhere->prev;
  30
  31   diWhere->prev->next = diWhat;
  32   diWhat->next->prev = diWhat;
  33 }
  34
  35 void ME_Remove(ME_DisplayItem *diWhere)
  36 {
  37   ME_DisplayItem *diNext = diWhere->next;
  38   ME_DisplayItem *diPrev = diWhere->prev;
  39   assert(diNext);
  40   assert(diPrev);
  41   diPrev->next = diNext;
  42   diNext->prev = diPrev;
  43 }
  44
  45 static BOOL ME_DITypesEqual(ME_DIType type, ME_DIType nTypeOrClass)
  46 {
  47   switch (nTypeOrClass)
  48   {
  49     case diRunOrParagraph:
  50       return type == diRun || type == diParagraph;
  51     case diRunOrStartRow:
  52       return type == diRun || type == diStartRow;
  53     case diParagraphOrEnd:
  54       return type == diTextEnd || type == diParagraph;
  55     case diStartRowOrParagraph:
  56       return type == diStartRow || type == diParagraph;
  57     case diStartRowOrParagraphOrEnd:
  58       return type == diStartRow || type == diParagraph || type == diTextEnd;
  59     case diRunOrParagraphOrEnd:
  60       return type == diRun || type == diParagraph || type == diTextEnd;
  61     default:
  62       return type == nTypeOrClass;
  63   }
  64 }
  65
  66 /* Modifies run pointer to point to the next run, and modify the
  67  * paragraph pointer if moving into the next paragraph.
  68  *
  69  * Returns TRUE if next run is found, otherwise returns FALSE. */
  70 BOOL ME_NextRun(ME_DisplayItem **para, ME_DisplayItem **run)
  71 {
  72   ME_DisplayItem *p = (*run)->next;
  73   while (p->type != diTextEnd)
  74   {
  75     if (p->type == diParagraph) {
  76       *para = p;
  77     } else if (p->type == diRun) {
  78       *run = p;
  79       return TRUE;
  80     }
  81     p = p->next;
  82   }
  83   return FALSE;
  84 }
  85
  86 /* Modifies run pointer to point to the previous run, and modify the
  87  * paragraph pointer if moving into the previous paragraph.
  88  *
  89  * Returns TRUE if previous run is found, otherwise returns FALSE. */
  90 BOOL ME_PrevRun(ME_DisplayItem **para, ME_DisplayItem **run)
  91 {
  92   ME_DisplayItem *p = (*run)->prev;
  93   while (p->type != diTextStart)
  94   {
  95     if (p->type == diParagraph) {
  96       if (p->member.para.prev_para->type == diParagraph)
  97         *para = p->member.para.prev_para;
  98     } else if (p->type == diRun) {
  99       *run = p;
 100       return TRUE;
 101     }
 102     p = p->prev;
 103   }
 104   return FALSE;
 105 }
 106
 107 ME_DisplayItem *ME_FindItemBack(ME_DisplayItem *di, ME_DIType nTypeOrClass)
 108 {
 109   if (!di)
 110     return NULL;
 111   di = di->prev;
 112   while(di!=NULL) {
 113     if (ME_DITypesEqual(di->type, nTypeOrClass))
 114       return di;
 115     di = di->prev;
 116   }
 117   return NULL;
 118 }
 119
 120 ME_DisplayItem *ME_FindItemBackOrHere(ME_DisplayItem *di, ME_DIType nTypeOrClass)
 121 {
 122   while(di!=NULL) {
 123     if (ME_DITypesEqual(di->type, nTypeOrClass))
 124       return di;
 125     di = di->prev;
 126   }
 127   return NULL;
 128 }
 129
 130 ME_DisplayItem *ME_FindItemFwd(ME_DisplayItem *di, ME_DIType nTypeOrClass)
 131 {
 132   if (!di) return NULL;
 133   di = di->next;
 134   while(di!=NULL) {
 135     if (ME_DITypesEqual(di->type, nTypeOrClass))
 136       return di;
 137     di = di->next;
 138   }
 139   return NULL;
 140 }
 141
 142 static const char *ME_GetDITypeName(ME_DIType type)
 143 {
 144   switch(type)
 145   {
 146     case diParagraph: return "diParagraph";
 147     case diRun: return "diRun";
 148     case diCell: return "diCell";
 149     case diTextStart: return "diTextStart";
 150     case diTextEnd: return "diTextEnd";
 151     case diStartRow: return "diStartRow";
 152     default: return "?";
 153   }
 154 }
 155
 156 void ME_DestroyDisplayItem(ME_DisplayItem *item)
 157 {
 158   if (0)
 159     TRACE("type=%s\n", ME_GetDITypeName(item->type));
 160   if (item->type==diParagraph)
 161   {
 162     FREE_OBJ(item->member.para.pFmt);
 163     ME_DestroyString(item->member.para.text);
 164   }
 165
 166   if (item->type==diRun)
 167   {
 168     if (item->member.run.ole_obj) ME_DeleteReObject(item->member.run.ole_obj);
 169     heap_free( item->member.run.glyphs );
 170     heap_free( item->member.run.clusters );
 171     ME_ReleaseStyle(item->member.run.style);
 172   }
 173   FREE_OBJ(item);
 174 }
 175
 176 ME_DisplayItem *ME_MakeDI(ME_DIType type)
 177 {
 178   ME_DisplayItem *item = ALLOC_OBJ(ME_DisplayItem);
 179   ZeroMemory(item, sizeof(ME_DisplayItem));
 180   item->type = type;
 181   item->prev = item->next = NULL;
 182   if (type == diParagraph)
 183   {
 184     item->member.para.pFmt = ALLOC_OBJ(PARAFORMAT2);
 185     ME_SetDefaultParaFormat(item->member.para.pFmt);
 186     item->member.para.nFlags = MEPF_REWRAP;
 187   }
 188
 189   return item;
 190 }
 191
 192 void ME_DumpDocument(ME_TextBuffer *buffer)
 193 {
 194   /* FIXME this is useless, */
 195   ME_DisplayItem *pItem = buffer->pFirst;
 196   TRACE("DOCUMENT DUMP START\n");
 197   while(pItem) {
 198     switch(pItem->type)
 199     {
 200       case diTextStart:
 201         TRACE("Start\n");
 202         break;
 203       case diCell:
 204         TRACE("Cell(level=%d%s)\n", pItem->member.cell.nNestingLevel,
 205               !pItem->member.cell.next_cell ? ", END" :
 206                 (!pItem->member.cell.prev_cell ? ", START" :""));
 207         break;
 208       case diParagraph:
 209         TRACE("Paragraph(ofs=%d)\n", pItem->member.para.nCharOfs);
 210         if (pItem->member.para.nFlags & MEPF_ROWSTART)
 211           TRACE(" - (Table Row Start)\n");
 212         if (pItem->member.para.nFlags & MEPF_ROWEND)
 213           TRACE(" - (Table Row End)\n");
 214         break;
 215       case diStartRow:
 216         TRACE(" - StartRow\n");
 217         break;
 218       case diRun:
 219         TRACE(" - Run(%s, %d, flags=%x)\n", debugstr_run( &pItem->member.run ),
 220           pItem->member.run.nCharOfs, pItem->member.run.nFlags);
 221         break;
 222       case diTextEnd:
 223         TRACE("End(ofs=%d)\n", pItem->member.para.nCharOfs);
 224         break;
 225       default:
 226         break;
 227     }
 228     pItem = pItem->next;
 229   }
 230   TRACE("DOCUMENT DUMP END\n");
 231 }