// EditEnter.cpp : implementation file
//

#include "stdafx.h"
#include "SerialTester.h"
#include "MainDlg.h"

#include "EditEnter.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif


/////////////////////////////////////////////////////////////////////////////
// CEditEnter

CEditEnter::CEditEnter()
{
}

CEditEnter::~CEditEnter()
{
}


BEGIN_MESSAGE_MAP(CEditEnter, CEdit)
	//{{AFX_MSG_MAP(CEditEnter)
	ON_CONTROL_REFLECT(EN_KILLFOCUS, OnKillfocus)
	ON_WM_CHAR()
	ON_WM_GETDLGCODE()
//	ON_WM_PAINT()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CEditEnter message handlers

void CEditEnter::OnKillfocus() 
{
	m_uLines = 0;
}

void CEditEnter::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	WORD line;
	line = HIWORD(this->CharFromPos(this->GetCaretPos()));

	switch(nChar) {
	case VK_RETURN:
		GetParent()->SendMessage(UWM_EDIT_COMPLETE, GetDlgCtrlID(), (LPARAM)this);
		if(line == this->GetLineCount() - 1){
			CEdit::OnChar(nChar, nRepCnt, nFlags);
		}
		break;
	default:
		CEdit::OnChar(nChar, nRepCnt, nFlags);
		break;
	}
}

UINT CEditEnter::OnGetDlgCode() 
{
	return CEdit::OnGetDlgCode() | DLGC_WANTALLKEYS;
}

void CEditEnter::SetLines()
{
	m_uLines = this->GetLineCount();
}

int CEditEnter::GetLines()
{
	this->SetLines();
	return m_uLines;
}

//------------------------------------------------------------------------
//
// Description
// -----------
// This function replaces the Windows function CharFromPos.
// CharFromPos does not work well for shift arrowing over very narrow
// text.
//
// Returns
// -------
// See CharFromPos documentation.
//------------------------------------------------------------------------
int CEditEnter::CharFromPosFix(CPoint pt)
{
   CString text;
   LPCTSTR pText;
   int     lineIndex = 0;

   // Get the text, a pointer to the line of text and the length.
   GetWindowText(text);
   int length = text.GetLength();
   pText = (LPCTSTR)text;
   if (GetStyle() & ES_MULTILINE)
   {
      lineIndex = LineIndex();
      pText += (lineIndex * sizeof(TCHAR));
      length -= lineIndex;
   }

   // Select the font in.
   CDC   *pCDC;
   pCDC = GetDC();
   CFont *pOldFont = pCDC->SelectObject(GetFont());

   // Find the correct position in the text using a binary search.
   WORD low = 0;
   WORD high = length;
   WORD mid;
   SIZE size;
   while (low < (high - 1))
   {
      mid = (low + high) / 2;
      GetTextExtentPoint32(*pCDC, pText, mid, &size);
      if (pt.x <= size.cx) high = mid;
      else low = mid;
   }

   // Restore stuff and compute return value.
   pCDC->SelectObject(pOldFont);
   ReleaseDC(pCDC);
   --high;            // Go to 0 based;
   high += lineIndex; // Add in previous lines.
   return (high + (LineFromChar(high) << 16));
}

CString CEditEnter::GetTextAt(int line_index)
{
 CString ret;

 long buf_size = LineLength(LineIndex(line_index))+1;
 LPTSTR line_buf = ret.GetBuffer(buf_size);
 int cc = GetLine((line_index==-1) ? (LineFromChar()) : (line_index),
line_buf, buf_size);
 ASSERT(cc>=0 && cc<buf_size);
 line_buf[cc] = '\0';

 ret.ReleaseBuffer();
 return ret;
}