riched20: Simplify the char offset from run offset function.

dlls/riched20/editor.c

@@ -4322,15 +4322,15 @@ LRESULT ME_HandleMessage(ME_TextEditor *editor, UINT msg, WPARAM wParam,
     }
     cursor_from_char_ofs( editor, wParam, &cursor );
     item = ME_RowStart( cursor.pRun );
-    nThisLineOfs = ME_CharOfsFromRunOfs( editor, cursor.pPara, ME_FindItemFwd( item, diRun ), 0 );
+    nThisLineOfs = run_char_ofs( &ME_FindItemFwd( item, diRun )->member.run, 0 );
     item_end = ME_FindItemFwd(item, diStartRowOrParagraphOrEnd);
     if (item_end->type == diStartRow)
-      nNextLineOfs = ME_CharOfsFromRunOfs(editor, cursor.pPara, ME_FindItemFwd( item_end, diRun ), 0);
+      nNextLineOfs = run_char_ofs( &ME_FindItemFwd( item_end, diRun )->member.run, 0 );
     else
     {
       ME_DisplayItem *endRun = ME_FindItemBack(item_end, diRun);
       assert(endRun && endRun->member.run.nFlags & MERF_ENDPARA);
-      nNextLineOfs = item_end->member.para.nCharOfs - endRun->member.run.len;
+      nNextLineOfs = run_char_ofs( &endRun->member.run, 0 );
     }
     nChars = nNextLineOfs - nThisLineOfs;
     TRACE("EM_LINELENGTH(%ld)==%d\n", wParam, nChars);

dlls/riched20/editor.h

@@ -120,6 +120,7 @@ int ME_RowNumberFromCharOfs(ME_TextEditor *editor, int nOfs) DECLSPEC_HIDDEN;
 /* run.c */
 void cursor_from_char_ofs( ME_TextEditor *editor, int char_ofs, ME_Cursor *cursor ) DECLSPEC_HIDDEN;
 
+int run_char_ofs( ME_Run *run, int ofs ) DECLSPEC_HIDDEN;
 ME_Run *run_create( ME_Style *s, int nFlags ) DECLSPEC_HIDDEN;
 ME_Run *run_insert( ME_TextEditor *editor, ME_Cursor *cursor,
                     ME_Style *style, const WCHAR *str, int len, int flags ) DECLSPEC_HIDDEN;
@@ -140,7 +141,6 @@ ME_Run *run_split( ME_TextEditor *editor, ME_Cursor *cursor ) DECLSPEC_HIDDEN;
 void ME_UpdateRunFlags(ME_TextEditor *editor, ME_Run *run) DECLSPEC_HIDDEN;
 SIZE ME_GetRunSizeCommon(ME_Context *c, const ME_Paragraph *para, ME_Run *run, int nLen,
                          int startx, int *pAscent, int *pDescent) DECLSPEC_HIDDEN;
-int ME_CharOfsFromRunOfs(ME_TextEditor *editor, const ME_DisplayItem *pPara, const ME_DisplayItem *pRun, int nOfs) DECLSPEC_HIDDEN;
 void ME_SkipAndPropagateCharOffset(ME_DisplayItem *p, int shift) DECLSPEC_HIDDEN;
 void ME_SetCharFormat(ME_TextEditor *editor, ME_Cursor *start, ME_Cursor *end, CHARFORMAT2W *pFmt) DECLSPEC_HIDDEN;
 void ME_SetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt) DECLSPEC_HIDDEN;

dlls/riched20/run.c

@@ -187,18 +187,15 @@ void ME_CheckCharOffsets(ME_TextEditor *editor)
 }
 
 /******************************************************************************
- * ME_CharOfsFromRunOfs
+ * run_char_ofs
  *
- * Converts a character position relative to the start of the run, to a
+ * Converts a character position relative to the start of the run to a
  * character position relative to the start of the document.
- * Kind of a "local to global" offset conversion.
  */
-int ME_CharOfsFromRunOfs(ME_TextEditor *editor, const ME_DisplayItem *pPara,
-                         const ME_DisplayItem *pRun, int nOfs)
+
+int run_char_ofs( ME_Run *run, int ofs )
 {
-  assert(pRun && pRun->type == diRun);
-  assert(pPara && pPara->type == diParagraph);
-  return pPara->member.para.nCharOfs + pRun->member.run.nCharOfs + nOfs;
+    return run->para->nCharOfs + run->nCharOfs + ofs;
 }
 
 /******************************************************************************