// ScreenSpyDlg.cpp : 实现文件
//

#include "stdafx.h"
#include "2015Remote.h"
#include "ScreenSpyDlg.h"
#include "afxdialogex.h"
#include <imm.h>
#include <WinUser.h>
#include "CGridDialog.h"


// CScreenSpyDlg 对话框

enum
{
	IDM_CONTROL = 0x1010,
	IDM_FULLSCREEN, 
	IDM_SEND_CTRL_ALT_DEL,
	IDM_TRACE_CURSOR,	// 跟踪显示远程鼠标
	IDM_BLOCK_INPUT,	// 锁定远程计算机输入
	IDM_SAVEDIB,		// 保存图片
	IDM_GET_CLIPBOARD,	// 获取剪贴板
	IDM_SET_CLIPBOARD,	// 设置剪贴板
	IDM_ADAPTIVE_SIZE,
};

IMPLEMENT_DYNAMIC(CScreenSpyDlg, CDialog)

#define ALGORITHM_DIFF 1

extern "C" void* x265_api_get_192() { return nullptr; }

extern "C" char* __imp_strtok(char* str, const char* delim) { return strtok(str, delim); }

CScreenSpyDlg::CScreenSpyDlg(CWnd* Parent, Server* IOCPServer, CONTEXT_OBJECT* ContextObject)
	: DialogBase(CScreenSpyDlg::IDD, Parent, IOCPServer, ContextObject, 0)
{
	m_lastMouseMove = 0;
	m_lastMousePoint = {};
	m_pCodec = nullptr;
	m_pCodecContext = nullptr;
	memset(&m_AVPacket, 0, sizeof(AVPacket));
	memset(&m_AVFrame, 0, sizeof(AVFrame));

	//创建解码器.
	bool succeed = false;
	m_pCodec = avcodec_find_decoder(AV_CODEC_ID_H264);
	if (m_pCodec) {
		m_pCodecContext = avcodec_alloc_context3(m_pCodec);
		if (m_pCodecContext) {
			succeed = (0 == avcodec_open2(m_pCodecContext, m_pCodec, 0));
		}
	}
	m_FrameID = 0;
	ImmDisableIME(0);// 禁用输入法
	m_bFullScreen = FALSE;

	CHAR szFullPath[MAX_PATH];
	GetSystemDirectory(szFullPath, MAX_PATH);
	lstrcat(szFullPath, "\\shell32.dll");  //图标
	m_hIcon = ExtractIcon(THIS_APP->m_hInstance, szFullPath, 17);

	m_bIsFirst = TRUE;
	m_ulHScrollPos = 0;
	m_ulVScrollPos = 0;

	ULONG	ulBitmapInforLength = m_ContextObject->InDeCompressedBuffer.GetBufferLength() - 1;
	m_BitmapInfor_Full = (BITMAPINFO *) new BYTE[ulBitmapInforLength];
	m_ContextObject->InDeCompressedBuffer.CopyBuffer(m_BitmapInfor_Full, ulBitmapInforLength, 1);

	m_bIsCtrl = FALSE;
	m_bIsTraceCursor = FALSE;
}


VOID CScreenSpyDlg::SendNext(void)
{
	BYTE	bToken = COMMAND_NEXT;
	m_ContextObject->Send2Client(&bToken, 1);
}


CScreenSpyDlg::~CScreenSpyDlg()
{
	if (m_BitmapInfor_Full!=NULL)
	{
		delete m_BitmapInfor_Full;
		m_BitmapInfor_Full = NULL;
	}

	::ReleaseDC(m_hWnd, m_hFullDC);   //GetDC
	::DeleteDC(m_hFullMemDC);                //Create匹配内存DC

	::DeleteObject(m_BitmapHandle);
	if (m_BitmapData_Full!=NULL)
	{
		m_BitmapData_Full = NULL;
	}
	if (m_pCodecContext)
	{
		avcodec_free_context(&m_pCodecContext);
		m_pCodecContext = 0;
	}

	m_pCodec = 0;
	// AVFrame需要清除
	av_frame_unref(&m_AVFrame);
}

void CScreenSpyDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}


BEGIN_MESSAGE_MAP(CScreenSpyDlg, CDialog)
	ON_WM_CLOSE()
	ON_WM_PAINT()
	ON_WM_SYSCOMMAND()
	ON_WM_HSCROLL()
	ON_WM_VSCROLL()
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_WM_MOUSEWHEEL()
	ON_WM_MOUSEMOVE()
	ON_WM_MOUSELEAVE()
	ON_WM_KILLFOCUS()
	ON_WM_SIZE()
	ON_WM_LBUTTONDBLCLK()
END_MESSAGE_MAP()


// CScreenSpyDlg 消息处理程序

void CScreenSpyDlg::OnLButtonDblClk(UINT nFlags, CPoint point)
{
	if (!m_bIsCtrl) {
		CWnd* parent = GetParent();
		if (parent) {
			// 通知父对话框，传递点击点
			CPoint ptScreen = point;
			ClientToScreen(&ptScreen);
			GetParent()->ScreenToClient(&ptScreen);
			GetParent()->SendMessage(WM_LBUTTONDBLCLK, nFlags, MAKELPARAM(ptScreen.x, ptScreen.y));
		}
	}
	CDialog::OnLButtonDblClk(nFlags, point);
}

BOOL CScreenSpyDlg::OnInitDialog()
{
	CDialog::OnInitDialog();
	SetIcon(m_hIcon,FALSE);

	CString strString;
	strString.Format("%s - 远程桌面控制 %d×%d", m_IPAddress, 
		m_BitmapInfor_Full->bmiHeader.biWidth, m_BitmapInfor_Full->bmiHeader.biHeight);
	SetWindowText(strString);

	m_hFullDC = ::GetDC(m_hWnd);
	m_hFullMemDC = CreateCompatibleDC(m_hFullDC);
	m_BitmapHandle = CreateDIBSection(m_hFullDC, m_BitmapInfor_Full, 
		DIB_RGB_COLORS, &m_BitmapData_Full, NULL, NULL);   //创建应用程序可以直接写入的、与设备无关的位图

	SelectObject(m_hFullMemDC, m_BitmapHandle);//择一对象到指定的设备上下文环境

	SetScrollRange(SB_HORZ, 0, m_BitmapInfor_Full->bmiHeader.biWidth);  //指定滚动条范围的最小值和最大值
	SetScrollRange(SB_VERT, 0, m_BitmapInfor_Full->bmiHeader.biHeight);//1366  768

	CMenu* SysMenu = GetSystemMenu(FALSE);
	if (SysMenu != NULL)
	{
		SysMenu->AppendMenu(MF_SEPARATOR);
		SysMenu->AppendMenu(MF_STRING, IDM_CONTROL, "控制屏幕(&Y)");
		SysMenu->AppendMenu(MF_STRING, IDM_FULLSCREEN, "全屏(&F)");
		SysMenu->AppendMenu(MF_STRING, IDM_ADAPTIVE_SIZE, "自适应窗口大小(&A)");
		SysMenu->AppendMenu(MF_STRING, IDM_TRACE_CURSOR, "跟踪被控端鼠标(&T)");
		SysMenu->AppendMenu(MF_STRING, IDM_BLOCK_INPUT, "锁定被控端鼠标和键盘(&L)");
		SysMenu->AppendMenu(MF_STRING, IDM_SAVEDIB, "保存快照(&S)");
		SysMenu->AppendMenu(MF_SEPARATOR);
		SysMenu->AppendMenu(MF_STRING, IDM_GET_CLIPBOARD, "获取剪贴板(&R)");
		SysMenu->AppendMenu(MF_STRING, IDM_SET_CLIPBOARD, "设置剪贴板(&L)");
		SysMenu->AppendMenu(MF_SEPARATOR);
	}

	m_bIsCtrl = THIS_CFG.GetInt("settings", "DXGI") == USING_VIRTUAL;
	m_bIsTraceCursor = FALSE;  //不是跟踪
	m_ClientCursorPos.x = 0;
	m_ClientCursorPos.y = 0;
	m_bCursorIndex = 0;

	m_hRemoteCursor = LoadCursor(NULL, IDC_ARROW);
	ICONINFO CursorInfo;
	::GetIconInfo(m_hRemoteCursor, &CursorInfo);
	SysMenu->CheckMenuItem(IDM_CONTROL, m_bIsCtrl ? MF_CHECKED : MF_UNCHECKED);
	SysMenu->CheckMenuItem(IDM_ADAPTIVE_SIZE, m_bAdaptiveSize ? MF_CHECKED : MF_UNCHECKED);
	SetClassLongPtr(m_hWnd, GCLP_HCURSOR, m_bIsCtrl ? (LONG_PTR)m_hRemoteCursor : (LONG_PTR)LoadCursor(NULL, IDC_NO));

	GetClientRect(&m_CRect);
	m_wZoom = ((double)m_BitmapInfor_Full->bmiHeader.biWidth) / ((double)(m_CRect.Width()));
	m_hZoom = ((double)m_BitmapInfor_Full->bmiHeader.biHeight) / ((double)(m_CRect.Height()));
	ShowScrollBar(SB_BOTH, !m_bAdaptiveSize);

	SendNext();

	return TRUE;
}


VOID CScreenSpyDlg::OnClose()
{
	CancelIO();
	// 恢复鼠标状态
	SetClassLongPtr(m_hWnd, GCLP_HCURSOR, (LONG_PTR)LoadCursor(NULL, IDC_ARROW));
	// 通知父窗口
	CWnd* parent = GetParent();
	if (parent)
		parent->SendMessage(WM_CHILD_CLOSED, (WPARAM)this, 0);

	// 等待数据处理完毕
	if (IsProcessing()) {
		ShowWindow(SW_HIDE);
		return;
	}

	DialogBase::OnClose();
}


VOID CScreenSpyDlg::OnReceiveComplete()
{
	assert (m_ContextObject);
	auto cmd = m_ContextObject->InDeCompressedBuffer.GetBYTE(0);
	switch(cmd)
	{
	case TOKEN_FIRSTSCREEN:
		{
			DrawFirstScreen();
			break;
		}
	case TOKEN_NEXTSCREEN:
		{
			DrawNextScreenDiff(false);
			break;
		}
	case TOKEN_KEYFRAME: {
		if (!m_bIsFirst) {
			DrawNextScreenDiff(true);
		}
		break;
	}
	case TOKEN_CLIPBOARD_TEXT:
		{
			Buffer str = m_ContextObject->InDeCompressedBuffer.GetMyBuffer(1);
			UpdateServerClipboard(str.c_str(), str.length());
			break;
		}
	default: {
		TRACE("CScreenSpyDlg unknown command: %d!!!\n", int(cmd));
		}
	}
}

VOID CScreenSpyDlg::DrawFirstScreen(void)
{
	m_bIsFirst = FALSE;

	//得到被控端发来的数据 ，将他拷贝到HBITMAP的缓冲区中，这样一个图像就出现了

	m_ContextObject->InDeCompressedBuffer.CopyBuffer(m_BitmapData_Full, m_BitmapInfor_Full->bmiHeader.biSizeImage, 1);
	PostMessage(WM_PAINT);//触发WM_PAINT消息
}

VOID CScreenSpyDlg::DrawNextScreenDiff(bool keyFrame)
{
	//该函数不是直接画到屏幕上，而是更新一下变化部分的屏幕数据然后调用
	//OnPaint画上去
	//根据鼠标是否移动和屏幕是否变化判断是否重绘鼠标，防止鼠标闪烁
	BOOL	bChange = FALSE;
	ULONG	ulHeadLength = 1 + 1 + sizeof(POINT) + sizeof(BYTE); // 标识 + 算法 + 光标 位置 + 光标类型索引
#if SCREENYSPY_IMPROVE
	int frameID = -1;
	memcpy(&frameID, m_ContextObject->InDeCompressedBuffer.GetBuffer(ulHeadLength), sizeof(int));
	ulHeadLength += sizeof(int);
	if (++m_FrameID != frameID) {
		TRACE("DrawNextScreenDiff [%d] bmp is lost from %d\n", frameID-m_FrameID, m_FrameID);
		m_FrameID = frameID;
	}
#else
	m_FrameID++;
#endif
	LPVOID	FirstScreenData = m_BitmapData_Full;
	LPVOID	NextScreenData = m_ContextObject->InDeCompressedBuffer.GetBuffer(ulHeadLength);
	ULONG	NextScreenLength = m_ContextObject->InDeCompressedBuffer.GetBufferLength() - ulHeadLength;

	POINT	OldClientCursorPos;
	memcpy(&OldClientCursorPos, &m_ClientCursorPos, sizeof(POINT));
	memcpy(&m_ClientCursorPos, m_ContextObject->InDeCompressedBuffer.GetBuffer(2), sizeof(POINT));

	// 鼠标移动了
	if (memcmp(&OldClientCursorPos, &m_ClientCursorPos, sizeof(POINT)) != 0)
	{
		bChange = TRUE;
	}

	// 光标类型发生变化
	BYTE bOldCursorIndex = m_bCursorIndex;
	m_bCursorIndex = m_ContextObject->InDeCompressedBuffer.GetBuffer(2+sizeof(POINT))[0];
	if (bOldCursorIndex != m_bCursorIndex)
	{
		bChange = TRUE;
		if (m_bIsCtrl && !m_bIsTraceCursor)//替换指定窗口所属类的WNDCLASSEX结构
#ifdef _WIN64
			SetClassLongPtrA(m_hWnd, GCLP_HCURSOR, (ULONG_PTR)m_CursorInfo.getCursorHandle(m_bCursorIndex == (BYTE)-1 ? 1 : m_bCursorIndex));
#else
			SetClassLongA(m_hWnd, GCL_HCURSOR, (LONG)m_CursorInfo.getCursorHandle(m_bCursorIndex == (BYTE)-1 ? 1 : m_bCursorIndex));
#endif
	}

	// 屏幕是否变化
	if (NextScreenLength > 0) 
	{
		bChange = TRUE;
	}

	BYTE algorithm = m_ContextObject->InDeCompressedBuffer.GetBYTE(1);
	LPBYTE dst = (LPBYTE)FirstScreenData, p = (LPBYTE)NextScreenData;
	if (keyFrame)
	{
		switch (algorithm)
		{
		case ALGORITHM_DIFF: case ALGORITHM_GRAY: {
			if (m_BitmapInfor_Full->bmiHeader.biSizeImage == NextScreenLength)
				memcpy(dst, p, m_BitmapInfor_Full->bmiHeader.biSizeImage);
			break;
		}
		case ALGORITHM_H264: {
			break;
		}
		default:
			break;
		}
	}
	else if (0 != NextScreenLength) {
		switch (algorithm)
		{
		case ALGORITHM_DIFF: {
			for (LPBYTE end = p + NextScreenLength; p < end; ) {
				ULONG ulCount = *(LPDWORD(p + sizeof(ULONG)));
				memcpy(dst + *(LPDWORD)p, p + 2 * sizeof(ULONG), ulCount);

				p += 2 * sizeof(ULONG) + ulCount;
			}
			break;
		}
		case ALGORITHM_GRAY: {
			for (LPBYTE end = p + NextScreenLength; p < end; ) {
				ULONG ulCount = *(LPDWORD(p + sizeof(ULONG)));
				LPBYTE p1 = dst + *(LPDWORD)p, p2 = p + 2 * sizeof(ULONG);
				for (int i = 0; i < ulCount; ++i, p1 += 4)
					memset(p1, *p2++, sizeof(DWORD));

				p += 2 * sizeof(ULONG) + ulCount;
			}
			break;
		}
		case ALGORITHM_H264: {
			if (Decode((LPBYTE)NextScreenData, NextScreenLength))
			{
				bChange = TRUE;
			}
			break;
		}
		default:
			break;
		}
	}

#if SCREENSPY_WRITE
	if (!WriteBitmap(m_BitmapInfor_Full, m_BitmapData_Full, "YAMA", frameID)) {
		TRACE("WriteBitmap [%d] failed!!!\n", frameID);
	}
#endif

	if (bChange)
	{
		PostMessage(WM_PAINT);
	}
}


bool CScreenSpyDlg::Decode(LPBYTE Buffer, int size) {
	// 解码数据.
	av_init_packet(&m_AVPacket);

	m_AVPacket.data = (uint8_t*)Buffer;
	m_AVPacket.size = size;

	int err = avcodec_send_packet(m_pCodecContext, &m_AVPacket);
	if (!err)
	{
		err = avcodec_receive_frame(m_pCodecContext, &m_AVFrame);
		if (err == AVERROR(EAGAIN)) {
			Mprintf("avcodec_receive_frame error: EAGAIN\n");
			return false;
		}

		// 解码数据前会清除m_AVFrame的内容.
		if (!err)
		{
			LPVOID Image[2] = { 0 };
			LPVOID CursorInfo[2] = { 0 };
			//成功.
			//I420 ---> ARGB.
			//WaitForSingleObject(m_hMutex,INFINITE);

			libyuv::I420ToARGB(
				m_AVFrame.data[0], m_AVFrame.linesize[0],
				m_AVFrame.data[1], m_AVFrame.linesize[1],
				m_AVFrame.data[2], m_AVFrame.linesize[2],
				(uint8_t*)m_BitmapData_Full,
				m_BitmapInfor_Full->bmiHeader.biWidth*4,
				m_BitmapInfor_Full->bmiHeader.biWidth,
				m_BitmapInfor_Full->bmiHeader.biHeight);
			return true;
		}
		Mprintf("avcodec_receive_frame failed with error: %d\n", err);
	}
	else {
		Mprintf("avcodec_send_packet failed with error: %d\n", err);
	}
	return false;
}

void CScreenSpyDlg::OnPaint()
{
	CPaintDC dc(this); // device context for painting

	if (m_bIsFirst)
	{
		DrawTipString("请等待......");
		return;
	}

	m_bAdaptiveSize ?
		StretchBlt(m_hFullDC, 0, 0, m_CRect.Width(), m_CRect.Height(), m_hFullMemDC, 0, 0, m_BitmapInfor_Full->bmiHeader.biWidth, m_BitmapInfor_Full->bmiHeader.biHeight, SRCCOPY) :
		BitBlt(m_hFullDC, 0, 0, m_BitmapInfor_Full->bmiHeader.biWidth, m_BitmapInfor_Full->bmiHeader.biHeight, m_hFullMemDC, m_ulHScrollPos, m_ulVScrollPos, SRCCOPY);

	if (m_bIsTraceCursor)
		DrawIconEx(
		m_hFullDC,								
		m_ClientCursorPos.x  - m_ulHScrollPos, 
		m_ClientCursorPos.y  - m_ulVScrollPos,
		m_CursorInfo.getCursorHandle(m_bCursorIndex == (BYTE)-1 ? 1 : m_bCursorIndex),
		0,0,										
		0,										
		NULL,									
		DI_NORMAL | DI_COMPAT					
		);
}

VOID CScreenSpyDlg::DrawTipString(CString strString)
{
	RECT Rect;
	GetClientRect(&Rect);
	//COLORREF用来描绘一个RGB颜色
	COLORREF  BackgroundColor = RGB(0x00, 0x00, 0x00);	
	COLORREF  OldBackgroundColor  = SetBkColor(m_hFullDC, BackgroundColor);
	COLORREF  OldTextColor = SetTextColor(m_hFullDC, RGB(0xff,0x00,0x00));
	//ExtTextOut函数可以提供一个可供选择的矩形，用当前选择的字体、背景颜色和正文颜色来绘制一个字符串
	ExtTextOut(m_hFullDC, 0, 0, ETO_OPAQUE, &Rect, NULL, 0, NULL);

	DrawText (m_hFullDC, strString, -1, &Rect,DT_SINGLELINE | DT_CENTER | DT_VCENTER);

	SetBkColor(m_hFullDC, BackgroundColor);
	SetTextColor(m_hFullDC, OldBackgroundColor);
}


void CScreenSpyDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	CMenu* SysMenu = GetSystemMenu(FALSE);

	switch (nID)
	{
	case IDM_CONTROL:
		{
			m_bIsCtrl = !m_bIsCtrl;
			SysMenu->CheckMenuItem(IDM_CONTROL, m_bIsCtrl ? MF_CHECKED : MF_UNCHECKED);
			SetClassLongPtr(m_hWnd, GCLP_HCURSOR, m_bIsCtrl ? (LONG_PTR)m_hRemoteCursor : (LONG_PTR)LoadCursor(NULL, IDC_NO));
			break;
		}
	case IDM_FULLSCREEN: // 全屏
		{
			EnterFullScreen();
			SysMenu->CheckMenuItem(IDM_FULLSCREEN, MF_CHECKED); //菜单样式
			break;
		}
	case IDM_SAVEDIB:    // 快照保存
		{
			SaveSnapshot();
			break;
		}
	case IDM_TRACE_CURSOR: // 跟踪被控端鼠标
		{	
			m_bIsTraceCursor = !m_bIsTraceCursor; //这里在改变数据
			SysMenu->CheckMenuItem(IDM_TRACE_CURSOR, m_bIsTraceCursor ? MF_CHECKED : MF_UNCHECKED);//在菜单打钩不打钩
			m_bAdaptiveSize = !m_bIsTraceCursor;
			ShowScrollBar(SB_BOTH, !m_bAdaptiveSize);
			// 重绘消除或显示鼠标
			OnPaint();
			break;
		}
	case IDM_BLOCK_INPUT: // 锁定服务端鼠标和键盘
		{
			BOOL bIsChecked = SysMenu->GetMenuState(IDM_BLOCK_INPUT, MF_BYCOMMAND) & MF_CHECKED;
			SysMenu->CheckMenuItem(IDM_BLOCK_INPUT, bIsChecked ? MF_UNCHECKED : MF_CHECKED);

			BYTE	bToken[2];
			bToken[0] = COMMAND_SCREEN_BLOCK_INPUT;
			bToken[1] = !bIsChecked;
			m_ContextObject->Send2Client(bToken, sizeof(bToken));
			break;
		}
	case IDM_GET_CLIPBOARD: //想要Client的剪贴板内容
		{
			BYTE	bToken = COMMAND_SCREEN_GET_CLIPBOARD;
			m_ContextObject->Send2Client(&bToken, sizeof(bToken));
			break;
		}
	case IDM_SET_CLIPBOARD: //给他
		{
			SendServerClipboard();
			break;
		}
	case IDM_ADAPTIVE_SIZE: {
			m_bAdaptiveSize = !m_bAdaptiveSize;
			ShowScrollBar(SB_BOTH, !m_bAdaptiveSize);
			SysMenu->CheckMenuItem(IDM_ADAPTIVE_SIZE, m_bAdaptiveSize ? MF_CHECKED : MF_UNCHECKED);
			break;
		}
	}

	CDialog::OnSysCommand(nID, lParam);
}


BOOL CScreenSpyDlg::PreTranslateMessage(MSG* pMsg)
{
#define MAKEDWORD(h,l)        (((unsigned long)h << 16) | l) 
	switch (pMsg->message)
	{
	case WM_LBUTTONDOWN: case WM_LBUTTONUP:
	case WM_RBUTTONDOWN: case WM_RBUTTONUP:
	case WM_LBUTTONDBLCLK: case WM_RBUTTONDBLCLK: case WM_MBUTTONDBLCLK:
	case WM_MBUTTONDOWN: case WM_MBUTTONUP:
	case WM_MOUSEMOVE: case WM_MOUSEWHEEL:
	{
		SendScaledMouseMessage(pMsg, true);
	}
	break;
	case WM_KEYDOWN: case WM_KEYUP: case WM_SYSKEYDOWN: case WM_SYSKEYUP:
		if (pMsg->wParam == VK_F11 && LeaveFullScreen()) // F11: 退出全屏
			return TRUE;
		if (pMsg->wParam != VK_LWIN && pMsg->wParam != VK_RWIN)
		{
			SendScaledMouseMessage(pMsg, true);
		}
		if (pMsg->wParam == VK_RETURN || pMsg->wParam == VK_ESCAPE)
			return TRUE;// 屏蔽Enter和ESC关闭对话
		break;
	}

	return CDialog::PreTranslateMessage(pMsg);
}


void CScreenSpyDlg::SendScaledMouseMessage(MSG* pMsg, bool makeLP) {
	if (!m_bIsCtrl)
		return;

	MYMSG msg(*pMsg);
	LONG x = LOWORD(pMsg->lParam), y = HIWORD(pMsg->lParam);
	LONG low = m_bAdaptiveSize ? x * m_wZoom : x + m_ulHScrollPos;
	LONG high = m_bAdaptiveSize ? y * m_hZoom : y + m_ulVScrollPos;
	if (makeLP) msg.lParam = MAKELPARAM(low, high);
	msg.pt.x = low;
	msg.pt.y = high;
	SendCommand(&msg);
}

VOID CScreenSpyDlg::SendCommand(const MYMSG* Msg)
{
	if (!m_bIsCtrl)
		return;

	if (Msg->message == WM_MOUSEMOVE) {
		auto now = clock();
		auto time_elapsed = now - m_lastMouseMove;
		int dx = abs(Msg->pt.x - m_lastMousePoint.x);
		int dy = abs(Msg->pt.y - m_lastMousePoint.y);
		int dist_sq = dx * dx + dy * dy;
		if (time_elapsed < 200 && dist_sq < 18 * 18) {
			return;
		}
		m_lastMouseMove = now;
		m_lastMousePoint = Msg->pt;
	}

	const int length = sizeof(MSG64) + 1;
	BYTE szData[length + 3];
	szData[0] = COMMAND_SCREEN_CONTROL;
	memcpy(szData + 1, Msg, sizeof(MSG64));
	szData[length] = 0;
	m_ContextObject->Send2Client(szData, length);
}

BOOL CScreenSpyDlg::SaveSnapshot(void)
{
	CString	strFileName = m_IPAddress + CTime::GetCurrentTime().Format("_%Y-%m-%d_%H-%M-%S.bmp");
	CFileDialog Dlg(FALSE, "bmp", strFileName, OFN_OVERWRITEPROMPT, "位图文件(*.bmp)|*.bmp|", this);
	if(Dlg.DoModal () != IDOK)
		return FALSE;

	WriteBitmap(m_BitmapInfor_Full, m_BitmapData_Full, Dlg.GetPathName().GetBuffer());

	return true;
}


VOID CScreenSpyDlg::UpdateServerClipboard(char *szBuffer,ULONG ulLength)
{
	if (!::OpenClipboard(NULL))
		return;

	::EmptyClipboard();
	HGLOBAL hGlobal = GlobalAlloc(GPTR, ulLength);  
	if (hGlobal != NULL) { 

		char*  szClipboardVirtualAddress  = (LPTSTR) GlobalLock(hGlobal); 
		memcpy(szClipboardVirtualAddress,szBuffer,ulLength); 
		GlobalUnlock(hGlobal);         
		if(NULL==SetClipboardData(CF_TEXT, hGlobal))
			GlobalFree(hGlobal);
	}
	CloseClipboard();
}

VOID CScreenSpyDlg::SendServerClipboard(void)
{
	if (!::OpenClipboard(NULL))  //打开剪切板设备
		return;
	HGLOBAL hGlobal = GetClipboardData(CF_TEXT);   //代表着一个内存
	if (hGlobal == NULL)
	{
		::CloseClipboard();
		return;
	}
	int	  iPacketLength = GlobalSize(hGlobal) + 1;
	char*   szClipboardVirtualAddress = (LPSTR) GlobalLock(hGlobal);    //锁定 
	LPBYTE	szBuffer = new BYTE[iPacketLength];

	szBuffer[0] = COMMAND_SCREEN_SET_CLIPBOARD;
	memcpy(szBuffer + 1, szClipboardVirtualAddress, iPacketLength - 1);
	::GlobalUnlock(hGlobal); 
	::CloseClipboard();
	m_ContextObject->Send2Client((PBYTE)szBuffer, iPacketLength);
	delete[] szBuffer;
}


void CScreenSpyDlg::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
	if (m_bAdaptiveSize) return;

	SCROLLINFO si = {sizeof(si)};
	si.fMask = SIF_ALL;
	GetScrollInfo(SB_HORZ, &si);

	int nPrevPos = si.nPos;
	switch(nSBCode)
	{
	case SB_LEFT:
		si.nPos = si.nMin;
		break;
	case SB_RIGHT:
		si.nPos = si.nMax;
		break;
	case SB_LINELEFT:
		si.nPos -= 8;
		break;
	case SB_LINERIGHT:
		si.nPos += 8;
		break;
	case SB_PAGELEFT:
		si.nPos -= si.nPage;
		break;
	case SB_PAGERIGHT:
		si.nPos += si.nPage;
		break;
	case SB_THUMBTRACK:
		si.nPos = si.nTrackPos;
		break;
	default:
		break;
	}
	si.fMask = SIF_POS;
	SetScrollInfo(SB_HORZ, &si, TRUE);
	if (si.nPos != nPrevPos)
	{
		m_ulHScrollPos += si.nPos - nPrevPos;
		ScrollWindow(nPrevPos - si.nPos, 0, NULL, NULL);
	}

	CDialog::OnHScroll(nSBCode, nPrevPos, pScrollBar);
}


void CScreenSpyDlg::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
	if (m_bAdaptiveSize) return;

	SCROLLINFO si = {sizeof(si)};
	si.fMask = SIF_ALL;
	GetScrollInfo(SB_VERT, &si);

	int nPrevPos = si.nPos;
	switch(nSBCode)
	{
	case SB_TOP:
		si.nPos = si.nMin;
		break;
	case SB_BOTTOM:
		si.nPos = si.nMax;
		break;
	case SB_LINEUP:
		si.nPos -= 8;
		break;
	case SB_LINEDOWN:
		si.nPos += 8;
		break;
	case SB_PAGEUP:
		si.nPos -= si.nPage;
		break;
	case SB_PAGEDOWN:
		si.nPos += si.nPage;
		break;
	case SB_THUMBTRACK:
		si.nPos = si.nTrackPos;
		break;
	default:
		break;
	}
	si.fMask = SIF_POS;
	SetScrollInfo(SB_VERT, &si, TRUE);
	if (si.nPos != nPrevPos)
	{
		m_ulVScrollPos += si.nPos - nPrevPos;
		ScrollWindow(0, nPrevPos - si.nPos, NULL, NULL);
	}

	CDialog::OnVScroll(nSBCode, nPrevPos, pScrollBar);
}


void CScreenSpyDlg::EnterFullScreen()
{
	if (!m_bFullScreen)
	{
		// 1. 获取鼠标位置
		POINT pt;
		GetCursorPos(&pt);

		// 2. 获取鼠标所在显示器
		HMONITOR hMonitor = MonitorFromPoint(pt, MONITOR_DEFAULTTONEAREST);
		MONITORINFO mi = { sizeof(mi) };
		if (!GetMonitorInfo(hMonitor, &mi))
			return;

		RECT rcMonitor = mi.rcMonitor;

		// 3. 记录当前窗口状态
		GetWindowPlacement(&m_struOldWndpl);

		// 4. 修改窗口样式，移除标题栏、边框
		LONG lStyle = GetWindowLong(m_hWnd, GWL_STYLE);
		lStyle &= ~(WS_CAPTION | WS_THICKFRAME | WS_BORDER);
		SetWindowLong(m_hWnd, GWL_STYLE, lStyle);

		// 5. 隐藏滚动条
		ShowScrollBar(SB_BOTH, !m_bAdaptiveSize);  // 隐藏水平和垂直滚动条

		// 6. 重新调整窗口大小并更新
		SetWindowPos(&CWnd::wndTop, rcMonitor.left, rcMonitor.top, rcMonitor.right - rcMonitor.left,
			rcMonitor.bottom - rcMonitor.top, SWP_NOZORDER | SWP_FRAMECHANGED);

		// 7. 标记全屏模式
		m_bFullScreen = true;
	}
}

// 全屏退出成功则返回true
bool CScreenSpyDlg::LeaveFullScreen()
{
	if (m_bFullScreen)
	{
		// 1. 恢复窗口样式
		LONG lStyle = GetWindowLong(m_hWnd, GWL_STYLE);
		lStyle |= (WS_CAPTION | WS_THICKFRAME | WS_BORDER);
		SetWindowLong(m_hWnd, GWL_STYLE, lStyle);

		// 2. 恢复窗口大小
		SetWindowPlacement(&m_struOldWndpl);
		SetWindowPos(&CWnd::wndTop, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER | SWP_FRAMECHANGED);

		// 3. 显示滚动条
		ShowScrollBar(SB_BOTH, !m_bAdaptiveSize);  // 显示水平和垂直滚动条

		// 4. 标记退出全屏
		m_bFullScreen = false;

		CMenu* SysMenu = GetSystemMenu(FALSE);
		SysMenu->CheckMenuItem(IDM_FULLSCREEN, MF_UNCHECKED); //菜单样式

		return true;
	}
	return false;
}

void CScreenSpyDlg::OnLButtonDown(UINT nFlags, CPoint point)
{
	CDialog::OnLButtonDown(nFlags, point);
}


void CScreenSpyDlg::OnLButtonUp(UINT nFlags, CPoint point)
{
	CDialog::OnLButtonUp(nFlags, point);
}


BOOL CScreenSpyDlg::OnMouseWheel(UINT nFlags, short zDelta, CPoint pt)
{
	return CDialog::OnMouseWheel(nFlags, zDelta, pt);
}


void CScreenSpyDlg::OnMouseMove(UINT nFlags, CPoint point)
{
	if (!m_bMouseTracking)
	{
		m_bMouseTracking = true;
		SetClassLongPtr(m_hWnd, GCLP_HCURSOR, m_bIsCtrl ? (LONG_PTR)m_hRemoteCursor : (LONG_PTR)LoadCursor(NULL, IDC_NO));
	}

	CDialog::OnMouseMove(nFlags, point);
}

void CScreenSpyDlg::OnMouseLeave()
{
	CWnd::OnMouseLeave();

	m_bMouseTracking = false;
	SetClassLongPtr(m_hWnd, GCLP_HCURSOR, m_bIsCtrl ? (LONG_PTR)m_hRemoteCursor : (LONG_PTR)LoadCursor(NULL, IDC_NO));
}

void CScreenSpyDlg::OnKillFocus(CWnd* pNewWnd)
{
	CDialog::OnKillFocus(pNewWnd);
}


void CScreenSpyDlg::OnSize(UINT nType, int cx, int cy)
{
	CDialog::OnSize(nType, cx, cy);

	// TODO: Add your message handler code here
	if (!IsWindowVisible())
		return;

	GetClientRect(&m_CRect);
	m_wZoom = ((double)m_BitmapInfor_Full->bmiHeader.biWidth) / ((double)(m_CRect.Width()));
	m_hZoom = ((double)m_BitmapInfor_Full->bmiHeader.biHeight) / ((double)(m_CRect.Height()));
}