richedit: Joined paragraph format depends on number of characters deleted.

dlls/riched20/caret.c

@@ -267,6 +267,7 @@ void ME_InternalDeleteText(ME_TextEditor *editor, int nOfs,
 {
   ME_Cursor c;
   int shift = 0;
+  int totalChars = nChars;
   
   while(nChars > 0)
   {
@@ -275,12 +276,15 @@ void ME_InternalDeleteText(ME_TextEditor *editor, int nOfs,
     run = &c.pRun->member.run;
     if (run->nFlags & MERF_ENDPARA) {
       int eollen = run->nCR + run->nLF;
+      BOOL keepFirstParaFormat;
 
       if (!ME_FindItemFwd(c.pRun, diParagraph))
       {
         return;
       }
-      ME_JoinParagraphs(editor, ME_GetParagraph(c.pRun));
+      keepFirstParaFormat = (totalChars == nChars && nChars <= eollen &&
+                             run->nCharOfs);
+      ME_JoinParagraphs(editor, ME_GetParagraph(c.pRun), keepFirstParaFormat);
       /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
       ME_CheckCharOffsets(editor);
       nChars -= (eollen < nChars) ? eollen : nChars;

dlls/riched20/editor.h

@@ -218,7 +218,8 @@ ME_DisplayItem *ME_GetParagraph(ME_DisplayItem *run);
 void ME_GetSelectionParas(ME_TextEditor *editor, ME_DisplayItem **para, ME_DisplayItem **para_end);
 void ME_MakeFirstParagraph(ME_TextEditor *editor);
 ME_DisplayItem *ME_SplitParagraph(ME_TextEditor *editor, ME_DisplayItem *rp, ME_Style *style, int numCR, int numLF);
-ME_DisplayItem *ME_JoinParagraphs(ME_TextEditor *editor, ME_DisplayItem *tp);
+ME_DisplayItem *ME_JoinParagraphs(ME_TextEditor *editor, ME_DisplayItem *tp,
+                                  BOOL keepFirstParaFormat);
 void ME_DumpParaStyle(ME_Paragraph *s);
 void ME_DumpParaStyleToBuf(const PARAFORMAT2 *pFmt, char buf[2048]);
 void ME_SetParaFormat(ME_TextEditor *editor, ME_DisplayItem *para, const PARAFORMAT2 *pFmt);

dlls/riched20/para.c

@@ -167,7 +167,8 @@ ME_DisplayItem *ME_SplitParagraph(ME_TextEditor *editor, ME_DisplayItem *run, ME
 
 /* join tp with tp->member.para.next_para, keeping tp's style; this
  * is consistent with the original */
-ME_DisplayItem *ME_JoinParagraphs(ME_TextEditor *editor, ME_DisplayItem *tp)
+ME_DisplayItem *ME_JoinParagraphs(ME_TextEditor *editor, ME_DisplayItem *tp,
+                                  BOOL keepFirstParaFormat)
 {
   ME_DisplayItem *pNext, *pFirstRunInNext, *pRun, *pTmp;
   int i, shift;
@@ -195,14 +196,17 @@ ME_DisplayItem *ME_JoinParagraphs(ME_TextEditor *editor, ME_DisplayItem *tp)
     ME_InitCharFormat2W(&fmt);
     ME_SetCharFormat(editor, pNext->member.para.nCharOfs - end_len, end_len, &fmt);
   }
-  undo = ME_AddUndoItem(editor, diUndoSplitParagraph, NULL);
+  undo = ME_AddUndoItem(editor, diUndoSplitParagraph, pNext);
   if (undo)
   {
     undo->nStart = pNext->member.para.nCharOfs - end_len;
     undo->nCR = pRun->member.run.nCR;
     undo->nLF = pRun->member.run.nLF;
-    assert(pNext->member.para.pFmt->cbSize == sizeof(PARAFORMAT2));
-    *undo->di.member.para.pFmt = *pNext->member.para.pFmt;
+  }
+  if (!keepFirstParaFormat)
+  {
+    ME_AddUndoItem(editor, diUndoSetParagraphFormat, tp);
+    *tp->member.para.pFmt = *pNext->member.para.pFmt;
   }
   
   shift = pNext->member.para.nCharOfs - tp->member.para.nCharOfs - end_len;

dlls/riched20/undo.c

@@ -89,10 +89,9 @@ ME_UndoItem *ME_AddUndoItem(ME_TextEditor *editor, ME_DIType type, const ME_Disp
     case diUndoJoinParagraphs:
       break;
     case diUndoSplitParagraph:
+      assert(pdi->member.para.pFmt->cbSize == sizeof(PARAFORMAT2));
       pItem->member.para.pFmt = ALLOC_OBJ(PARAFORMAT2);
-      pItem->member.para.pFmt->cbSize = sizeof(PARAFORMAT2);
-      pItem->member.para.pFmt->dwMask = 0;
- 
+      *pItem->member.para.pFmt = *pdi->member.para.pFmt;
       break;
     default:
       assert(0 == "AddUndoItem, unsupported item type");
@@ -282,8 +281,11 @@ static void ME_PlayUndoItem(ME_TextEditor *editor, ME_DisplayItem *pItem)
   case diUndoSetParagraphFormat:
   {
     ME_Cursor tmp;
+    ME_DisplayItem *para;
     ME_CursorFromCharOfs(editor, pItem->member.para.nCharOfs, &tmp);
-    ME_SetParaFormat(editor, ME_FindItemBack(tmp.pRun, diParagraph), pItem->member.para.pFmt);
+    para = ME_FindItemBack(tmp.pRun, diParagraph);
+    ME_AddUndoItem(editor, diUndoSetParagraphFormat, para);
+    *para->member.para.pFmt = *pItem->member.para.pFmt;
     break;
   }
   case diUndoSetCharFormat:
@@ -306,7 +308,7 @@ static void ME_PlayUndoItem(ME_TextEditor *editor, ME_DisplayItem *pItem)
     ME_Cursor tmp;
     ME_CursorFromCharOfs(editor, pUItem->nStart, &tmp);
     /* the only thing that's needed is paragraph offset, so no need to split runs */
-    ME_JoinParagraphs(editor, ME_GetParagraph(tmp.pRun));
+    ME_JoinParagraphs(editor, ME_GetParagraph(tmp.pRun), TRUE);
     break;
   }
   case diUndoSplitParagraph: