sessiondialog.cpp

tightvnc源码

//  Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
//
//  This file is part of the VNC system.
//
//  The VNC system is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation; either version 2 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
//  USA.
//
// TightVNC distribution homepage on the Web: http://www.tightvnc.com/
//
// If the source code for the VNC system is not available from the place 
// whence you received this file, check http://www.uk.research.att.com/vnc or contact
// the authors on [e-mail] for information on obtaining it.


// SessionDialog.cpp: implementation of the SessionDialog class.

#include "stdhdrs.h"
#include "vncviewer.h"
#include "SessionDialog.h"
#include "Exception.h"
#include "Htmlhelp.h"



SessionDialog::SessionDialog(VNCOptions *pOpt,ClientConnection *cc)
{
	m_pOpt = pOpt;
	m_cc = cc;
	DWORD dispos;

	RegCreateKeyEx(HKEY_CURRENT_USER,
		KEY_VNCVIEWER_HISTORI, 0, NULL, 
		REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS,
		NULL, &m_hRegKey, &dispos);
    
}

SessionDialog::~SessionDialog()
{
  RegCloseKey(m_hRegKey); 
}

// It's exceedingly unlikely, but possible, that if two modal dialogs were
// closed at the same time, the static variables used for transfer between 
// window procedure and this method could overwrite each other.
int SessionDialog::DoDialog()
{
 	return DialogBoxParam(pApp->m_instance, DIALOG_MAKEINTRESOURCE(IDD_SESSION_DLG), 
							NULL, (DLGPROC) SessDlgProc, (LONG) this);
}

BOOL CALLBACK SessionDialog::SessDlgProc(  HWND hwnd,  UINT uMsg,  WPARAM wParam, LPARAM lParam ) 
{
	// This is a static method, so we don't know which instantiation we're 
	// dealing with. But we can get a pseudo-this from the parameter to 
	// WM_INITDIALOG, which we therafter store with the window and retrieve
	// as follows:
	SessionDialog *_this = (SessionDialog *) GetWindowLong(hwnd, GWL_USERDATA);
	int i;
	TCHAR tmphost[256];
	TCHAR buffer[256];
	HWND hCustomRadio = GetDlgItem(hwnd, IDC_CUSTOM_RADIO);
	HWND hModemRadio = GetDlgItem(hwnd, IDC_MODEM_RADIO);
	HWND hLocNetRadio = GetDlgItem(hwnd, IDC_LOC_NET_RADIO);
	HWND hListMode = GetDlgItem(hwnd, IDC_LIST_MODE);
	HWND hcombo = GetDlgItem(hwnd, IDC_HOSTNAME_EDIT);

	switch (uMsg) {
	case WM_INITDIALOG: 
		{			
            SetWindowLong(hwnd, GWL_USERDATA, lParam);
            SessionDialog *_this = (SessionDialog *) lParam;
            CentreWindow(hwnd);
			_this->m_cc->m_hSess = hwnd;
            // Set up recently-used list
            int dwbuflen=255;
			TCHAR valname[256];
			TCHAR buf[256];
			int maxEntries = pApp->m_options.m_historyLimit;

			for ( i = 0; i < maxEntries; i++) { 
				itoa(i, valname, 10);
				dwbuflen=255;
				if (RegQueryValueEx( _this->m_hRegKey, (LPTSTR)valname, 
					NULL, NULL, 
					(LPBYTE)buf, (LPDWORD)&dwbuflen) != ERROR_SUCCESS) {
					break;
				}
				SendMessage(hcombo, CB_INSERTSTRING, (WPARAM)i, (LPARAM)(int FAR*)buf);
			}
			if (_this->m_pOpt->m_display[0] == '\0') {
				SendMessage(hcombo, CB_SETCURSEL, 0, 0);
				SendMessage(hcombo, CB_GETLBTEXT, 0, (LPARAM)(int FAR*)buffer );
				_this->m_pOpt->LoadOpt(buffer, KEY_VNCVIEWER_HISTORI);
			} else {
				SetDlgItemText(hwnd, IDC_HOSTNAME_EDIT, _this->m_pOpt->m_display);
			}
			_this->cmp(hwnd);
			
			SetFocus(hcombo);
            return TRUE;
		}
	case WM_HELP: 
		help.Popup(lParam);
		return 0;		
	case WM_ACTIVATE:
	case WM_ACTIVATEAPP:
		if ((pApp->m_options.m_listening) || 
			(FindWindow("VNCviewer Daemon", 0) != NULL)) {
			EnableWindow( hListMode, FALSE);
		}
		if((!pApp->m_options.m_listening) && 
			(FindWindow("VNCviewer Daemon", 0) == NULL)) {
			EnableWindow( hListMode, TRUE);
		}
		return 0;		
	case WM_COMMAND:		
		switch (LOWORD(wParam)) {
		case IDC_HOSTNAME_EDIT:
			switch (HIWORD(wParam)) {
			case  CBN_SELCHANGE:
				{
					int a = (int)SendMessage(hcombo, CB_GETCURSEL, 0, 0L);
					SendMessage(hcombo, CB_GETLBTEXT, a, (LPARAM)(int FAR*)buffer );
					_this->m_pOpt->LoadOpt(buffer,KEY_VNCVIEWER_HISTORI);
					
					_this->cmp(hwnd);
					
					SetFocus(hcombo);
					return TRUE;
				}
			}
			return TRUE;
		case IDC_LOAD:
			{
				TCHAR buf[80];
				buf[0]='\0';
				if (_this->m_cc->LoadConnection(buf, true) != -1) {
					FormatDisplay(_this->m_cc->m_port,
							_this->m_pOpt->m_display,
							_this->m_cc->m_host);
					SetDlgItemText(hwnd, IDC_HOSTNAME_EDIT,
									_this->m_pOpt->m_display);
					 _this->cmp(hwnd);
				}
				SetFocus(hcombo);
				return TRUE;
			}
		case IDC_LIST_MODE: 
			pApp->m_options.LoadOpt(".listen", KEY_VNCVIEWER_HISTORI);
			pApp->m_options.m_listening=true;
			pApp->ListenMode();
			EndDialog(hwnd, FALSE);
			return TRUE; 				
		case IDC_OK:             
			TCHAR display[256];			
			GetDlgItemText(hwnd, IDC_HOSTNAME_EDIT, display, 256);			 
			if (_tcslen(display) == 0) {				
				EndDialog(hwnd, TRUE);
				return TRUE;
			}
			if (!ParseDisplay(display, tmphost, 255, &_this->m_cc->m_port)) {
				MessageBox(NULL, 
						_T("Invalid VNC server specified.\n\r")
						_T("Server should be of the form host:display."), 
						_T("Connection setup"), MB_OK | MB_ICONEXCLAMATION );
				return TRUE;
			} else {
				_tcscpy(_this->m_cc->m_host, tmphost);
				_tcscpy(_this->m_pOpt->m_display, display);
			}
			
			EndDialog(_this->m_pOpt->m_hParent, FALSE);
			EndDialog(hwnd, TRUE);

			return TRUE;						
		case IDCANCEL:
			EndDialog(_this->m_pOpt->m_hParent, FALSE);
			EndDialog(hwnd, FALSE);			
			return TRUE;				
		case IDC_LOC_NET_RADIO:
			switch (HIWORD(wParam)) {
			case BN_CLICKED:
				// FIXME: Eliminate code duplication, see below
				// (handle connection profiles in one place, in VNCOptions?)
				_this->SetConnectionProfile(false, true);
				return TRUE;
			}
			return TRUE;
		case IDC_MODEM_RADIO:
			switch (HIWORD(wParam)) {
			case BN_CLICKED:
				// FIXME: Eliminate code duplication, see above and below.
				_this->SetConnectionProfile(true, false);
				return TRUE;
			}
			return TRUE;
		case IDC_CUSTOM_RADIO:
			switch (HIWORD(wParam)) {
			case BN_CLICKED:
				// FIXME: Eliminate code duplication, see above.
				_this->SetConnectionProfile(false, false);
				return TRUE;
			}
			return TRUE;
		case IDC_OPTIONBUTTON:
			{
				if (SetForegroundWindow(_this->m_pOpt->m_hParent) != 0) return 0;
				HWND hOptionButton = GetDlgItem(hwnd, IDC_OPTIONBUTTON);
				_this->m_pOpt->DoDialog();				
				GetDlgItemText(hwnd, IDC_HOSTNAME_EDIT, 
								_this->m_pOpt->m_display, 256);
				SendMessage(hcombo, CB_RESETCONTENT, 0, 0);
				int dwbuflen = 255;
				TCHAR valname[256];
				TCHAR buf[256];
				int maxEntries = pApp->m_options.m_historyLimit;				
				for ( i = 0; i < maxEntries; i++) { 				
					itoa(i, valname, 10);
					dwbuflen = 255;
					if(RegQueryValueEx( _this->m_hRegKey, (LPTSTR)valname , NULL, NULL, 
						(LPBYTE) buf, (LPDWORD) &dwbuflen) != ERROR_SUCCESS) {
						break;
					}
					SendMessage(hcombo, CB_INSERTSTRING, (WPARAM)i, (LPARAM)(int FAR*)buf);
				}
				SetDlgItemText(hwnd, IDC_HOSTNAME_EDIT, _this->m_pOpt->m_display); 				
				_this->cmp(hwnd);									
				SetFocus(hOptionButton);
				return TRUE;
			}
		}			
	case WM_DESTROY:
		EndDialog(hwnd, FALSE);
		return TRUE;
	}	
	return 0;
}


int SessionDialog::cmp(HWND hwnd)
{
	int a=1;
	HWND hCustomRadio = GetDlgItem(hwnd, IDC_CUSTOM_RADIO);
	HWND hModemRadio = GetDlgItem(hwnd, IDC_MODEM_RADIO);
	HWND hLocNetRadio = GetDlgItem(hwnd, IDC_LOC_NET_RADIO);
	int i;
	for (i = rfbEncodingRaw; i <= LASTENCODING; i++)
		if ((m_pOpt->m_UseEnc[i] != true) && (i != 3)) a = 0;
	if (m_pOpt->m_UseEnc[3] != false) a = 0;
	if (m_pOpt->m_PreferredEncoding != rfbEncodingTight) a = 0;
	if (m_pOpt->m_Use8Bit != true) a = 0;
	if (m_pOpt->m_useCompressLevel != true) {
		a = 0;
	} else {
		if (m_pOpt->m_compressLevel != 6) a = 0;
	}
	if (a == 1) {
		SendMessage(hModemRadio, BM_CLICK, 0, 0);
		return a;
	}

	a = 2;
	for (i = rfbEncodingRaw; i <= LASTENCODING; i++)
		if ((m_pOpt->m_UseEnc[i] != true) && (i != 3)) a = 0;
	if (m_pOpt->m_UseEnc[3] != false) a = 0;
	if (m_pOpt->m_Use8Bit != false) a = 0;
	if (m_pOpt->m_PreferredEncoding != rfbEncodingHextile) a = 0;
		
	if (a == 2) {
		SendMessage(hLocNetRadio, BM_CLICK, 0, 0);
		return a;
	}

	a = 3;
	for (i = rfbEncodingRaw; i <= LASTENCODING; i++)
		if ((m_pOpt->m_UseEnc[i] != true) && (i != 3)) a = 0;
	if (m_pOpt->m_UseEnc[3] != false) a = 0;
	if (m_pOpt->m_PreferredEncoding != rfbEncodingTight) a = 0;
	if (m_pOpt->m_useCompressLevel != false) a = 0;
	if (m_pOpt->m_Use8Bit != false) a = 0;
	if (m_pOpt->m_enableJpegCompression != true) {
		a = 0;
	} else {
		if (m_pOpt->m_jpegQualityLevel != 6) a = 0;
	}
	if (a == 3) {
		SendMessage(hCustomRadio, BM_CLICK, 0, 0);
		return a;
	}
	if (a == 0) {
		SendMessage(hLocNetRadio, BM_SETCHECK, 0, 0L);
		SendMessage(hModemRadio, BM_SETCHECK, 0, 0L);
		SendMessage(hCustomRadio, BM_SETCHECK, 0, 0L);
		return a;
	}
	return a;
}

void SessionDialog::SetConnectionProfile(bool LowBandwidth, bool HighSpeed) 
{
	for (int i = rfbEncodingRaw; i <= LASTENCODING; i++)
		m_pOpt->m_UseEnc[i] = true;

	m_pOpt->m_UseEnc[3] = false;	
	if (!LowBandwidth && !HighSpeed) {
		m_pOpt->m_PreferredEncoding = rfbEncodingTight;
		m_pOpt->m_useCompressLevel = false;
		m_pOpt->m_enableJpegCompression = true;
		m_pOpt->m_jpegQualityLevel = 6;
		m_pOpt->m_Use8Bit = false;
	}
	if (LowBandwidth && !HighSpeed) {
		m_pOpt->m_PreferredEncoding = rfbEncodingTight;
		m_pOpt->m_useCompressLevel = true;
		m_pOpt->m_compressLevel = 6;
		m_pOpt->m_Use8Bit = true;
	}
	if (!LowBandwidth && HighSpeed) {
		m_pOpt->m_PreferredEncoding = rfbEncodingHextile;
		m_pOpt->m_Use8Bit = false;
	}
}