#include "stdafx.h"
#include "LogEdit.h"


#define MENU_ITEM_SEL_ALL		0x666
#define MENU_ITEM_COPY			0x667
#define MENU_ITEM_CLEAR			0x668

CLogEdit::CLogEdit()
{
	m_nMaxLineCount = 0xffff;
}


CLogEdit::~CLogEdit()
{
}

BEGIN_MESSAGE_MAP(CLogEdit, CEdit)
	ON_WM_CONTEXTMENU()
END_MESSAGE_MAP()

void CLogEdit::SetMaxLineCount(int line)
{
	m_nMaxLineCount = line;
}

void CLogEdit::OnContextMenu(CWnd* pWnd, CPoint point)
{
	HMENU hMenu = CreatePopupMenu();
	InsertMenu(hMenu, 0, MF_BYPOSITION, MENU_ITEM_SEL_ALL, "È«Ñ¡");
	InsertMenu(hMenu, 1, MF_BYPOSITION, MENU_ITEM_COPY, "¸´ÖÆ");
	InsertMenu(hMenu, 2, MF_BYPOSITION | MF_SEPARATOR, NULL, NULL);	
	InsertMenu(hMenu, 3, MF_BYPOSITION, MENU_ITEM_CLEAR, "È«²¿Çå³ý");
	int cmd = ::TrackPopupMenu(hMenu,
		TPM_LEFTALIGN | TPM_RIGHTBUTTON | TPM_RETURNCMD,
		point.x, point.y + 2, 0, m_hWnd, NULL);
	DestroyMenu(hMenu);

	if (cmd == MENU_ITEM_SEL_ALL) {
		SetFocus();
		this->SetSel(0, -1);
	}
	else if (cmd == MENU_ITEM_COPY) {
		this->Copy();
	}
	else if (cmd == MENU_ITEM_CLEAR) {
		SetWindowText(_T(""));
	}
}

void CLogEdit::AppendText(const char* pszText)
{
	// »ñÈ¡Ñ¡Ôñ·¶Î§ÒÔ±ã»Ö¸´
	int nStart, nEnd;
	GetSel(nStart, nEnd);


	// ³¬¹ýÖ¸¶¨ÐÐÊýÔòɾ³ý×îÇ°ÃæµÄÐÐ
	int nLineCount = GetLineCount();
	while (nLineCount > m_nMaxLineCount) {
		int nLin1End = LineIndex(1);
		nStart -= nLin1End;
		if (nStart < 0) nStart = 0;
		nEnd -= nLin1End;
		if (nEnd < 0) nEnd = 0;

		SetSel(0, nLin1End);
		ReplaceSel(_T(""));
		nLineCount = GetLineCount();
	}


	// ×·¼Óµ½×îºó
	int length = GetWindowTextLength();
	SetSel(length, length);
	ReplaceSel(pszText);
	PostMessage(WM_VSCROLL, SB_BOTTOM, 0);


	// »Ö¸´
	if (nStart == 0 && nEnd == 0) {
		nStart = GetWindowTextLength();
		nEnd = nStart;
	}
	SetSel(nStart, nEnd);
}