riched20: Use TxDraw() to implement the host's WM_PAINT handler.

dlls/riched20/editor.h

@@ -390,7 +390,7 @@ extern const struct ITextServicesVtbl text_services_stdcall_vtbl DECLSPEC_HIDDEN
 #define TXTSERV_VTABLE(This) (This)->lpVtbl
 #endif
 #define ITextServices_TxSendMessage(This,a,b,c,d) TXTSERV_VTABLE(This)->TxSendMessage(This,a,b,c,d)
-#define ITextServices_TxDraw(This,a,b,c,d,e,f,g,h,i,j,k,l) TXTSERV_VTABLE(This)->ITextServices_TxDraw(This,a,b,c,d,e,f,g,h,i,j,k,l)
+#define ITextServices_TxDraw(This,a,b,c,d,e,f,g,h,i,j,k,l) TXTSERV_VTABLE(This)->TxDraw(This,a,b,c,d,e,f,g,h,i,j,k,l)
 #define ITextServices_TxGetHScroll(This,a,b,c,d,e) TXTSERV_VTABLE(This)->TxGetHScroll(This,a,b,c,d,e)
 #define ITextServices_TxGetVScroll(This,a,b,c,d,e) TXTSERV_VTABLE(This)->TxGetVScroll(This,a,b,c,d,e)
 #define ITextServices_OnTxSetCursor(This,a,b,c,d,e,f,g,h,i) TXTSERV_VTABLE(This)->OnTxSetCursor(This,a,b,c,d,e,f,g,h,i)

dlls/riched20/txthost.c

@@ -1219,7 +1219,8 @@ static LRESULT RichEditWndProc_common( HWND hwnd, UINT msg, WPARAM wparam,
             ps.rcPaint.right = editor->rcFormat.right;
         }
 
-        editor_draw( editor, hdc, &ps.rcPaint );
+        ITextServices_TxDraw( host->text_srv, DVASPECT_CONTENT, 0, NULL, NULL, hdc, NULL, NULL, NULL,
+                              &ps.rcPaint, NULL, 0, TXTVIEW_ACTIVE );
         DeleteObject( SelectObject( hdc, brush ) );
         EndPaint( editor->hWnd, &ps );
         return 0;