Added emulation of RichEdit 1.0 behaviour when the 1.0 window class is

being used. This emulation (introduced in M$ RichEdit 3.0) counts
paragraph endings as 2 characters (CR+LF) instead of 1 (CR).

dlls/riched20/caret.c

@@ -192,6 +192,8 @@ void ME_InternalDeleteText(ME_TextEditor *editor, int nOfs,
       /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
       ME_CheckCharOffsets(editor);
       nChars--;
+      if (editor->bEmulateVersion10 && nChars)
+        nChars--;
       continue;
     }
     else
@@ -455,19 +457,24 @@ static BOOL ME_ArrowLeft(ME_TextEditor *editor, ME_Cursor *p)
 
 static BOOL ME_ArrowRight(ME_TextEditor *editor, ME_Cursor *p)
 {
-  int new_ofs = ME_StrRelPos2(p->pRun->member.run.strText, p->nOffset, 1);
-  if (new_ofs<p->pRun->member.run.strText->nLen) {
-    p->nOffset = new_ofs;
-  }
-  else
+  ME_DisplayItem *pRun;
+  
+  if (!(p->pRun->member.run.nFlags & MERF_ENDPARA))
   {
-    ME_DisplayItem *pRun = ME_FindItemFwd(p->pRun, diRun);
-    if (pRun) {
-      p->pRun = pRun;
-      assert(p->pRun->type == diRun);
-      p->nOffset = 0;
+    int new_ofs = ME_StrRelPos2(p->pRun->member.run.strText, p->nOffset, 1);
+    
+    if (new_ofs<p->pRun->member.run.strText->nLen)
+    {
+      p->nOffset = new_ofs;
+      return TRUE;
     }
   }
+  pRun = ME_FindItemFwd(p->pRun, diRun);
+  if (pRun) {
+    p->pRun = pRun;
+    assert(p->pRun->type == diRun);
+    p->nOffset = 0;
+  }
   return TRUE;
 }
 

dlls/riched20/editor.c

@@ -720,6 +720,7 @@ ME_TextEditor *ME_MakeEditor(HWND hWnd) {
   HDC hDC;
   int i;
   ed->hWnd = hWnd;
+  ed->bEmulateVersion10 = FALSE;
   ed->pBuffer = ME_MakeText();
   hDC = GetDC(hWnd);
   ME_MakeFirstParagraph(hDC, ed->pBuffer);
@@ -1577,8 +1578,18 @@ LRESULT WINAPI RichEditANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lP
  */
 LRESULT WINAPI RichEdit10ANSIWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
+  LRESULT result;
+  
   /* FIXME: this is NOT the same as 2.0 version */
-  return RichEditANSIWndProc(hWnd, msg, wParam, lParam);
+  result = RichEditANSIWndProc(hWnd, msg, wParam, lParam);
+  if (msg == WM_NCCREATE)
+  {
+    ME_TextEditor *editor = (ME_TextEditor *)GetWindowLongW(hWnd, 0);
+    
+    editor->bEmulateVersion10 = TRUE;
+    editor->pBuffer->pLast->member.para.nCharOfs = 2;
+  }
+  return result;
 }
 
 void ME_SendOldNotify(ME_TextEditor *editor, int nCode)

dlls/riched20/editstr.h

@@ -247,6 +247,7 @@ typedef struct tagME_FontCacheItem
 typedef struct tagME_TextEditor
 {
   HWND hWnd;
+  BOOL bEmulateVersion10;
   BOOL bCaretShown;
   ME_TextBuffer *pBuffer;
   ME_Cursor *pCursors;

dlls/riched20/para.c

@@ -101,6 +101,7 @@ ME_DisplayItem *ME_SplitParagraph(ME_TextEditor *editor, ME_DisplayItem *run, ME
   ME_UndoItem *undo = NULL;
   int ofs;
   ME_DisplayItem *pp;
+  int end_len = (editor->bEmulateVersion10 ? 2 : 1);
   
   assert(run->type == diRun);  
 
@@ -122,7 +123,7 @@ ME_DisplayItem *ME_SplitParagraph(ME_TextEditor *editor, ME_DisplayItem *run, ME
     pp = ME_FindItemFwd(pp, diRunOrParagraphOrEnd);
   }
   new_para->member.para.nCharOfs = ME_GetParagraph(run)->member.para.nCharOfs+ofs;
-  new_para->member.para.nCharOfs += 1;
+  new_para->member.para.nCharOfs += end_len;
   
   new_para->member.para.nFlags = MEPF_REWRAP; /* FIXME copy flags (if applicable) */
   /* FIXME initialize format style and call ME_SetParaFormat blah blah */
@@ -148,7 +149,7 @@ ME_DisplayItem *ME_SplitParagraph(ME_TextEditor *editor, ME_DisplayItem *run, ME
   new_para->member.para.prev_para->member.para.nFlags |= MEPF_REWRAP;
   
   /* we've added the end run, so we need to modify nCharOfs in the next paragraphs */
-  ME_PropagateCharOffset(next_para, 1);
+  ME_PropagateCharOffset(next_para, end_len);
   editor->nParagraphs++;
   
   return new_para;
@@ -161,6 +162,7 @@ ME_DisplayItem *ME_JoinParagraphs(ME_TextEditor *editor, ME_DisplayItem *tp)
   ME_DisplayItem *pNext, *pFirstRunInNext, *pRun, *pTmp;
   int i, shift;
   ME_UndoItem *undo = NULL;
+  int end_len = (editor->bEmulateVersion10 ? 2 : 1);
 
   assert(tp->type == diParagraph);
   assert(tp->member.para.next_para);
@@ -172,17 +174,17 @@ ME_DisplayItem *ME_JoinParagraphs(ME_TextEditor *editor, ME_DisplayItem *tp)
     /* null char format operation to store the original char format for the ENDPARA run */
     CHARFORMAT2W fmt;
     ME_InitCharFormat2W(&fmt);
-    ME_SetCharFormat(editor, pNext->member.para.nCharOfs-1, 1, &fmt);
+    ME_SetCharFormat(editor, pNext->member.para.nCharOfs - end_len, end_len, &fmt);
   }
   undo = ME_AddUndoItem(editor, diUndoSplitParagraph, NULL);
   if (undo)
   {
-    undo->nStart = pNext->member.para.nCharOfs-1;
+    undo->nStart = pNext->member.para.nCharOfs - end_len;
     assert(pNext->member.para.pFmt->cbSize == sizeof(PARAFORMAT2));
     CopyMemory(undo->di.member.para.pFmt, pNext->member.para.pFmt, sizeof(PARAFORMAT2));
   }
   
-  shift = pNext->member.para.nCharOfs - tp->member.para.nCharOfs - 1;
+  shift = pNext->member.para.nCharOfs - tp->member.para.nCharOfs - end_len;
   
   pRun = ME_FindItemBack(pNext, diRunOrParagraph);
   pFirstRunInNext = ME_FindItemFwd(pNext, diRunOrParagraph);
@@ -218,7 +220,7 @@ ME_DisplayItem *ME_JoinParagraphs(ME_TextEditor *editor, ME_DisplayItem *tp)
   ME_Remove(pNext);
   ME_DestroyDisplayItem(pNext);
 
-  ME_PropagateCharOffset(tp->member.para.next_para, -1);
+  ME_PropagateCharOffset(tp->member.para.next_para, -end_len);
   
   ME_CheckCharOffsets(editor);
   

dlls/riched20/run.c

@@ -97,7 +97,10 @@ void ME_CheckCharOffsets(ME_TextEditor *editor)
           p->member.run.nFlags,
           p->member.run.style->fmt.dwMask & p->member.run.style->fmt.dwEffects);
         assert(ofs == p->member.run.nCharOfs);
-        ofs += ME_StrLen(p->member.run.strText);
+        if (p->member.run.nFlags & MERF_ENDPARA)
+          ofs += (editor->bEmulateVersion10 ? 2 : 1);
+        else
+          ofs += ME_StrLen(p->member.run.strText);
         break;
       default:
         assert(0);

dlls/riched20/writer.c

@@ -764,6 +764,8 @@ ME_StreamOutText(ME_TextEditor *editor, int nStart, int nChars, DWORD dwFormat)
     }
     
     nChars -= nLen;
+    if (editor->bEmulateVersion10 && nChars && item->member.run.nFlags & MERF_ENDPARA)
+      nChars--;
     nStart = 0;
     item = ME_FindItemFwd(item, diRun);
   }