riched20: Add a paragraph ptr to each run.

dlls/riched20/editstr.h

@@ -143,6 +143,7 @@ typedef struct tagME_Run
 {
   ME_String *strText;
   ME_Style *style;
+  struct tagME_Paragraph *para; /* ptr to the run's paragraph */
   int nCharOfs; /* relative to para's offset */
   int nWidth; /* width of full run, width of leading&trailing ws */
   int nFlags;

dlls/riched20/para.c

@@ -67,6 +67,7 @@ void ME_MakeFirstParagraph(ME_TextEditor *editor)
   eol_str = ME_MakeStringN(cr_lf, editor->bEmulateVersion10 ? 2 : 1);
   run = ME_MakeRun(style, eol_str, MERF_ENDPARA);
   run->member.run.nCharOfs = 0;
+  run->member.run.para = &para->member.para;
 
   ME_InsertBefore(text->pLast, para);
   ME_InsertBefore(text->pLast, run);
@@ -213,13 +214,14 @@ ME_DisplayItem *ME_SplitParagraph(ME_TextEditor *editor, ME_DisplayItem *run,
   } else { /* v1.0 - v3.0 */
     assert(!(paraFlags & (MEPF_CELL|MEPF_ROWSTART|MEPF_ROWEND)));
   }
-  end_run = ME_MakeRun(style, eol_str, run_flags);
-
   assert(run->type == diRun);
   run_para = ME_GetParagraph(run);
   assert(run_para->member.para.pFmt->cbSize == sizeof(PARAFORMAT2));
 
+  end_run = ME_MakeRun(style, eol_str, run_flags);
   ofs = end_run->member.run.nCharOfs = run->member.run.nCharOfs;
+  end_run->member.run.para = run->member.run.para;
+
   next_para = run_para->member.para.next_para;
   assert(next_para == ME_FindItemFwd(run_para, diParagraphOrEnd));
 
@@ -238,6 +240,7 @@ ME_DisplayItem *ME_SplitParagraph(ME_TextEditor *editor, ME_DisplayItem *run,
   pp = run;
   while(pp->type == diRun) {
     pp->member.run.nCharOfs -= ofs;
+    pp->member.run.para = &new_para->member.para;
     pp = ME_FindItemFwd(pp, diRunOrParagraphOrEnd);
   }
   new_para->member.para.nCharOfs = run_para->member.para.nCharOfs + ofs;
@@ -409,6 +412,7 @@ ME_DisplayItem *ME_JoinParagraphs(ME_TextEditor *editor, ME_DisplayItem *tp,
       break;
     TRACE("shifting \"%s\" by %d (previous %d)\n", debugstr_w(pTmp->member.run.strText->szData), shift, pTmp->member.run.nCharOfs);
     pTmp->member.run.nCharOfs += shift;
+    pTmp->member.run.para = &tp->member.para;
   } while(1);
 
   ME_Remove(pRun);

dlls/riched20/run.c

@@ -310,6 +310,7 @@ ME_DisplayItem *ME_SplitRunSimple(ME_TextEditor *editor, ME_Cursor *cursor)
                        run->member.run.nFlags & MERF_SPLITMASK);
 
   new_run->member.run.nCharOfs = run->member.run.nCharOfs + nOffset;
+  new_run->member.run.para = run->member.run.para;
   cursor->pRun = new_run;
   cursor->nOffset = 0;
 
@@ -341,6 +342,7 @@ ME_DisplayItem *ME_MakeRun(ME_Style *s, ME_String *strData, int nFlags)
   item->member.run.strText = strData;
   item->member.run.nFlags = nFlags;
   item->member.run.nCharOfs = -1;
+  item->member.run.para = NULL;
   ME_AddRefStyle(s);
   return item;
 }
@@ -366,6 +368,7 @@ ME_InsertRunAtCursor(ME_TextEditor *editor, ME_Cursor *cursor, ME_Style *style,
 
   pDI = ME_MakeRun(style, ME_MakeStringN(str, len), flags);
   pDI->member.run.nCharOfs = cursor->pRun->member.run.nCharOfs;
+  pDI->member.run.para = cursor->pRun->member.run.para;
   ME_InsertBefore(cursor->pRun, pDI);
   TRACE("Shift length:%d\n", len);
   ME_PropagateCharOffset(cursor->pRun, len);