rlfdlg.cpp

pdf去除水印的vc实现,用vc开发pdf方向的可参看

// RLFDlg.cpp : implementation file
//

#include "stdafx.h"
#include "RLF.h"
#include "RLFDlg.h"
#include ".\rlfdlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	enum { IDD = IDD_ABOUTBOX };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

// Implementation
protected:
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}

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

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()


// CRLFDlg dialog



CRLFDlg::CRLFDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CRLFDlg::IDD, pParent)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

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

BEGIN_MESSAGE_MAP(CRLFDlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
	ON_BN_CLICKED(IDOK, OnBnClickedOk)
END_MESSAGE_MAP()


// CRLFDlg message handlers

BOOL CRLFDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon

	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CRLFDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CRLFDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CRLFDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

void CRLFDlg::OnBnClickedOk()
{
	CFileDialog dlg( TRUE );
	if( dlg.DoModal() == IDOK ) 
	{
		CString strFileName = dlg.GetPathName();
		CString strNewFile = dlg.GetPathName();
		strNewFile.Insert(strNewFile.GetLength() - 4, "_New");

		//CString strFileName = "d:\\Test_7370f0_abc.pdf";
		//CString strNewFile = "d:\\Test_7370f0_abc_New.pdf";

		int nReadBytes = 1024;
		char cBuf[2048];
		char *pcPos = NULL;
		char *pcPos1 = NULL;
		int i;

		CFile file, newFile;
		if( file.Open(strFileName, CFile::modeRead ) ){
			

			newFile.Open( strNewFile, CFile::modeCreate | CFile::modeWrite );

			while ( nReadBytes == 1024 ) {
				nReadBytes = file.Read( cBuf, 1024);

				pcPos = NULL;
				for (i=0; i<nReadBytes; i++) {
					if( cBuf[i] == '<' ) {
						pcPos = strstr( cBuf + i + 1, "/.notdef 4 0 R" );
						if( pcPos ) {
							break;
						}
						i ++;
					}
				}

				if( pcPos ) {
					newFile.Write( cBuf, (UINT)(pcPos - cBuf));

					pcPos1 = strstr( pcPos, ">>" );
					if( pcPos1 == NULL ) {
						nReadBytes = file.Read( cBuf, 1024);
						pcPos = cBuf;
						pcPos1 = strstr( pcPos, ">>" ) ;
					}

					if( pcPos1 ) {
						newFile.Write( pcPos1, (UINT)(1024 - (pcPos1 - cBuf)) );
						break;
					}

					break;
				}

				newFile.Write( cBuf, nReadBytes );
			}
		}

		while ( nReadBytes == 1024 ) {
			nReadBytes = file.Read( cBuf, 1024);
			newFile.Write( cBuf, nReadBytes );
		}

		newFile.Close();
		file.Close();
	}
}