vncmenu.cpp

Web VNC samples delphi

//  Copyright (C) 2004 HorizonWimba, Inc. All Rights Reserved.
//  Copyright (C) 2003-2006 Constantin Kaplinsky. All Rights Reserved.
//  Copyright (C) 2002 RealVNC Ltd. All Rights Reserved.
//  Copyright (C) 2000 Tridia Corporation. All Rights Reserved.
//  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.


// vncMenu

// Implementation of a system tray icon & menu for WinVNC

#include "stdhdrs.h"
#include "WinVNC.h"
#include "vncService.h"
#include "vncConnDialog.h"
#include <lmcons.h>

// Header

#include "vncMenu.h"

// Constants
const UINT MENU_PROPERTIES_SHOW = RegisterWindowMessage("WinVNC.Properties.User.Show");
const UINT MENU_SERVER_SHAREALL = RegisterWindowMessage("WinVNC.Server.ShareAll");
const UINT MENU_SERVER_SHAREPRIMARY = RegisterWindowMessage("WinVNC.Server.SharePrimary");
const UINT MENU_SERVER_SHAREAREA = RegisterWindowMessage("WinVNC.Server.ShareArea");
const UINT MENU_SERVER_SHAREWINDOW = RegisterWindowMessage("WinVNC.Server.ShareWindow");
const UINT MENU_DEFAULT_PROPERTIES_SHOW = RegisterWindowMessage("WinVNC.Properties.Default.Show");
const UINT MENU_ABOUTBOX_SHOW = RegisterWindowMessage("WinVNC.AboutBox.Show");
const UINT MENU_SERVICEHELPER_MSG = RegisterWindowMessage("WinVNC.ServiceHelper.Message");
const UINT MENU_RELOAD_MSG = RegisterWindowMessage("WinVNC.Reload.Message");
const UINT MENU_ADD_CLIENT_MSG = RegisterWindowMessage("WinVNC.AddClient.Message");
const UINT MENU_KILL_ALL_CLIENTS_MSG = RegisterWindowMessage("WinVNC.KillAllClients.Message");

const UINT fileTransferDownloadMessage = RegisterWindowMessage("VNCServer.1.3.FileTransferDownloadMessage");

const char *MENU_CLASS_NAME = "WinVNC Tray Icon";

// Implementation

vncMenu::vncMenu(vncServer *server)
{
	// Save the server pointer
	m_server = server;

	// Set the initial user name to something sensible...
	vncService::CurrentUser((char *)&m_username, sizeof(m_username));

	// Create a dummy window to handle tray icon messages
	WNDCLASSEX wndclass;

	wndclass.cbSize			= sizeof(wndclass);
	wndclass.style			= 0;
	wndclass.lpfnWndProc	= vncMenu::WndProc;
	wndclass.cbClsExtra		= 0;
	wndclass.cbWndExtra		= 0;
	wndclass.hInstance		= hAppInstance;
	wndclass.hIcon			= LoadIcon(NULL, IDI_APPLICATION);
	wndclass.hCursor		= LoadCursor(NULL, IDC_ARROW);
	wndclass.hbrBackground	= (HBRUSH) GetStockObject(WHITE_BRUSH);
	wndclass.lpszMenuName	= (const char *) NULL;
	wndclass.lpszClassName	= MENU_CLASS_NAME;
	wndclass.hIconSm		= LoadIcon(NULL, IDI_APPLICATION);

	RegisterClassEx(&wndclass);

	m_hwnd = CreateWindow(MENU_CLASS_NAME,
				MENU_CLASS_NAME,
				WS_OVERLAPPEDWINDOW,
				CW_USEDEFAULT,
				CW_USEDEFAULT,
				200, 200,
				NULL,
				NULL,
				hAppInstance,
				NULL);
	if (m_hwnd == NULL)
	{
		vnclog.Print(LL_INTERR, VNCLOG("unable to CreateWindow:%d\n"), GetLastError());
		PostQuitMessage(0);
		return;
	}

	// Timer to trigger icon updating
	SetTimer(m_hwnd, 1, 5000, NULL);

	// record which client created this window
	SetWindowLong(m_hwnd, GWL_USERDATA, (LONG) this);

	// Ask the server object to notify us of stuff
	server->AddNotify(m_hwnd);

	// Load the icons for the tray
	m_winvnc_normal_icon = LoadIcon(hAppInstance, MAKEINTRESOURCE(IDI_WINVNC));
	m_winvnc_disabled_icon = LoadIcon(hAppInstance, MAKEINTRESOURCE(IDI_DISABLED));
	m_flash_icon = LoadIcon(hAppInstance, MAKEINTRESOURCE(IDI_FLASH));

	// Load the popup menu
	m_hmenu = LoadMenu(hAppInstance, MAKEINTRESOURCE(IDR_TRAYMENU));

	// Initialise the properties dialog object
	if (!m_properties.Init(m_server))
	{
		vnclog.Print(LL_INTERR, VNCLOG("unable to initialise Properties dialog\n"));
		PostQuitMessage(0);
		return;
	}

	// Install the tray icon!
	AddTrayIcon();
}

vncMenu::~vncMenu()
{
	// Remove the tray icon
	DelTrayIcon();
	
	// Destroy the loaded menu
	if (m_hmenu != NULL)
		DestroyMenu(m_hmenu);

	// Tell the server to stop notifying us!
	if (m_server != NULL)
		m_server->RemNotify(m_hwnd);
}

void
vncMenu::AddTrayIcon()
{
	// If the user name is empty, then we consider no user is logged in.
	if (strcmp(m_username, "") != 0) {
		// Make sure the server has not been configured to
		// suppress the tray icon.
		if (!m_server->GetDisableTrayIcon())
			SendTrayMsg(NIM_ADD, FALSE);
	}
}

void
vncMenu::DelTrayIcon()
{
	SendTrayMsg(NIM_DELETE, FALSE);
}

void
vncMenu::FlashTrayIcon(BOOL flash)
{
	SendTrayMsg(NIM_MODIFY, flash);
}

// Get the local ip addresses as a human-readable string.
// If more than one, then with \n between them.
// If not available, then gets a message to that effect.
void GetIPAddrString(char *buffer, int buflen) {
    char namebuf[256];

    if (gethostname(namebuf, 256) != 0) {
	strncpy(buffer, "Host name unavailable", buflen);
	return;
    };

    HOSTENT *ph = gethostbyname(namebuf);
    if (!ph) {
	strncpy(buffer, "IP address unavailable", buflen);
	return;
    };

    *buffer = '\0';
    char digtxt[5];
    for (int i = 0; ph->h_addr_list[i]; i++) {
    	for (int j = 0; j < ph->h_length; j++) {
	    sprintf(digtxt, "%d.", (unsigned char) ph->h_addr_list[i][j]);
	    strncat(buffer, digtxt, (buflen-1)-strlen(buffer));
	}	
	buffer[strlen(buffer)-1] = '\0';
	if (ph->h_addr_list[i+1] != 0)
	    strncat(buffer, ", ", (buflen-1)-strlen(buffer));
    }
}

void
vncMenu::SendTrayMsg(DWORD msg, BOOL flash)
{
	// Create the tray icon message
	m_nid.hWnd = m_hwnd;
	m_nid.cbSize = sizeof(m_nid);
	m_nid.uID = IDI_WINVNC;			// never changes after construction
	m_nid.hIcon = m_winvnc_normal_icon;
	m_nid.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
	m_nid.uCallbackMessage = WM_TRAYNOTIFY;

	// Construct the tip string
	const char *title = (vncService::RunningAsService()) ?
		"TightVNC Service - " : "TightVNC Server - ";
	m_nid.szTip[0] = '\0';
	strncat(m_nid.szTip, title, sizeof(m_nid.szTip) - 1);
	if (m_server->SockConnected()) {
		size_t tiplen = strlen(m_nid.szTip);
		char *tipptr = ((char *)&m_nid.szTip) + tiplen;

		// Try to add the server's IP addresses to the tip string, if possible
		GetIPAddrString(tipptr, sizeof(m_nid.szTip) - tiplen);
		if (m_server->ClientsDisabled()) {
			m_nid.hIcon = m_winvnc_disabled_icon;
			strncat(m_nid.szTip, " (new clients disabled)",
					sizeof(m_nid.szTip) - 1 - strlen(m_nid.szTip));
		} else if (!m_server->ValidPasswordsSet()) {
			m_nid.hIcon = m_winvnc_disabled_icon;
			strncat(m_nid.szTip, " (no valid passwords set)",
					sizeof(m_nid.szTip) - 1 - strlen(m_nid.szTip));
		}
	} else {
		m_nid.hIcon = m_winvnc_disabled_icon;
		strncat(m_nid.szTip, "Not listening",
				sizeof(m_nid.szTip) - 1 - strlen(m_nid.szTip));
	}

	if (flash)
		m_nid.hIcon = m_flash_icon;

	// Send the message
	if (Shell_NotifyIcon(msg, &m_nid))
	{
		// Set the enabled/disabled state of the menu items
		vnclog.Print(LL_INTINFO, VNCLOG("tray icon updated ok\n"));

		EnableMenuItem(m_hmenu, ID_PROPERTIES,
			m_properties.AllowProperties() ? MF_ENABLED : MF_GRAYED);
		EnableMenuItem(m_hmenu, ID_CLOSE,
			m_properties.AllowShutdown() ? MF_ENABLED : MF_GRAYED);
		EnableMenuItem(m_hmenu, ID_DISABLE_CONN,
			m_properties.AllowShutdown() ? MF_ENABLED : MF_GRAYED);
		EnableMenuItem(m_hmenu, ID_KILLCLIENTS,
			m_properties.AllowEditClients() ? MF_ENABLED : MF_GRAYED);
		EnableMenuItem(m_hmenu, ID_OUTGOING_CONN,
			m_properties.AllowEditClients() ? MF_ENABLED : MF_GRAYED);
	} else {
		if (!vncService::RunningAsService())
		{
			if (msg == NIM_ADD)
			{
				// The tray icon couldn't be created, so use the Properties dialog
				// as the main program window
				vnclog.Print(LL_INTINFO, VNCLOG("opening dialog box\n"));
				m_properties.Show(TRUE, TRUE);
				vnclog.Print(LL_INTERR, VNCLOG("unable to add tray icon\n"), GetLastError());
				PostQuitMessage(0);
			}
		}
	}
}

// Process window messages
LRESULT CALLBACK vncMenu::WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
	// This is a static method, so we don't know which instantiation we're 
	// dealing with. We use Allen Hadden's ([e-mail]) suggestion 
	// from a newsgroup to get the pseudo-this.
	vncMenu *_this = (vncMenu *) GetWindowLong(hwnd, GWL_USERDATA);

	switch (iMsg)
	{

		// Every five seconds, a timer message causes the icon to update
	case WM_TIMER:
	    	// *** HACK for running servicified
		if (vncService::RunningAsService()) {
		    // Attempt to add the icon if it's not already there
		    _this->AddTrayIcon();
		    // Trigger a check of the current user
		    PostMessage(hwnd, WM_USERCHANGED, 0, 0);
		}

		// Update the icon
		_this->FlashTrayIcon(_this->m_server->AuthClientCount() != 0);
		break;

		// DEAL WITH NOTIFICATIONS FROM THE SERVER:

	case WM_SRV_CLIENT_AUTHENTICATED:
		_this->m_properties.ResetTabId();
		_this->FlashTrayIcon(TRUE);
		return 0;

	case WM_SRV_CLIENT_DISCONNECT:
		_this->m_properties.ResetTabId();
		if (_this->m_server->AuthClientCount() == 0) {
			_this->FlashTrayIcon(FALSE);
			_this->m_wputils.RestoreWallpaper();
		}
		return 0;

	case WM_SRV_CLIENT_HIDEWALLPAPER:
		_this->m_wputils.KillWallpaper();
		_this->m_server->ClearWallpaperWait();
		return 0;

		// STANDARD MESSAGE HANDLING

	case WM_CREATE:
		return 0;

	case WM_COMMAND:
		// User has clicked an item on the tray menu
		switch (LOWORD(wParam))
		{

		case ID_DEFAULT_PROPERTIES:
			// Show the default properties dialog, unless it is already displayed
			vnclog.Print(LL_INTINFO, VNCLOG("show default properties requested\n"));
			_this->m_properties.Show(TRUE, FALSE);