enigmailCommon.js
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enigmailCommon.js
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	// enigmailCommon.js: shared JS functions for Enigmail

	// This Enigmail version and compatible Enigmime version
	var gEnigmailVersion = "0.81.1.0";
	var gEnigmimeVersion = "0.81.1.0";

	// Maximum size of message directly processed by Enigmail
	const ENIG_MSG_BUFFER_SIZE = 96000;
	const ENIG_MSG_HEADER_SIZE = 16000;

	const ENIG_KEY_BUFFER_SIZE = 64000;

	const ENIG_PROCESSINFO_CONTRACTID = "@mozilla.org/xpcom/process-info;1";
	const ENIG_PIPECONSOLE_CONTRACTID = "@mozilla.org/process/pipe-console;1";
	const ENIG_IPCBUFFER_CONTRACTID = "@mozilla.org/process/ipc-buffer;1";
	const ENIG_PIPEFILTERLISTENER_CONTRACTID = "@mozilla.org/process/pipe-filter-listener;1";
	const ENIG_ENIGMAIL_CONTRACTID = "@mozdev.org/enigmail/enigmail;1";
	const ENIG_ENIGMIMELISTENER_CONTRACTID = "@mozilla.org/enigmail/mime-listener;1";
	const ENIG_ENIGMIMESERVICE_CONTRACTID = "@mozdev.org/enigmail/enigmimeservice;1";
	const ENIG_STRINGBUNDLE_CONTRACTID = "@mozilla.org/intl/stringbundle;1";
	const ENIG_LOCAL_FILE_CONTRACTID = "@mozilla.org/file/local;1";
	const ENIG_DIRSERVICE_CONTRACTID = "@mozilla.org/file/directory_service;1";
	const ENIG_MIME_CONTRACTID = "@mozilla.org/mime;1";
	const ENIG_WMEDIATOR_CONTRACTID = "@mozilla.org/rdf/datasource;1?name=window-mediator";
	const ENIG_APPSHELL_MEDIATOR_CONTRACTID = "@mozilla.org/appshell/window-mediator;1"

	const ENIG_LOCALFILEOUTPUTSTREAM_CONTRACTID =
	"@mozilla.org/network/file-output-stream;1";
	const ENIG_STANDARD_URL_CONTRACTID = "@mozilla.org/network/standard-url;1";

	const ENIG_STREAMCONVERTERSERVICE_CID_STR =
	"{892FFEB0-3F80-11d3-A16C-0050041CAF44}";

	const ENIG_ISCRIPTABLEUNICODECONVERTER_CONTRACTID = "@mozilla.org/intl/scriptableunicodeconverter";

	const ENIG_IOSERVICE_CONTRACTID = "@mozilla.org/network/io-service;1";

	const ENIGMAIL_PREFS_ROOT = "extensions.enigmail.";

	// Interfaces
	const nsIEnigmail = Components.interfaces.nsIEnigmail;
	const nsIEnigStrBundle = Components.interfaces.nsIStringBundleService;

	// Encryption flags
	if (nsIEnigmail) {
	const ENIG_SIGN = nsIEnigmail.SEND_SIGNED;
	const ENIG_ENCRYPT = nsIEnigmail.SEND_ENCRYPTED;
	const ENIG_ENCRYPT_OR_SIGN = ENIG_ENCRYPT \| ENIG_SIGN;
	}

	// UsePGPMimeOption values
	const PGP_MIME_NEVER = 0;
	const PGP_MIME_POSSIBLE = 1;
	const PGP_MIME_ALWAYS = 2;

	// property name for temporary directory service
	const ENIG_TEMPDIR_PROP = "TmpD";

	var gUsePGPMimeOptionList = ["usePGPMimeNever", "usePGPMimePossible",
	"usePGPMimeAlways"];

	var gEnigDefaultEncryptionOptions = ["defaultEncryptionNone",
	"defaultEncryptionOnly",
	"defaultEncryptionSign"];

	var gEnigRecipientsSelectionOptions = ["askRecipientsNever",
	"askRecipientsClever",
	"askRecipientsAlways"];

	var gEnigImmediateSendOptions = ["sendLater",
	"sendNow"];

	const ENIG_BUTTON_POS_0 = 1;
	const ENIG_BUTTON_POS_1 = 1 << 8;
	const ENIG_BUTTON_POS_2 = 1 << 16;
	const ENIG_BUTTON_TITLE_IS_STRING = 127;

	const ENIG_THREE_BUTTON_STRINGS = (ENIG_BUTTON_TITLE_IS_STRING * ENIG_BUTTON_POS_0) +
	(ENIG_BUTTON_TITLE_IS_STRING * ENIG_BUTTON_POS_1) +
	(ENIG_BUTTON_TITLE_IS_STRING * ENIG_BUTTON_POS_2);


	var gEnigmailPrefDefaults = {"configuredVersion":"",
	"logDirectory":"",
	"initAlertCount":2,
	"composeHtmlAlertCount":3,
	"agentPath":"",
	"autoCrypto":false,
	"useDefaultComment":false,
	"userIdValue":"",
	"userIdFromAddr":false,
	"noPassphrase":false,
	"usePGPMimeOption":PGP_MIME_POSSIBLE,
	"mimeHashAlgorithm":1,
	"alwaysTrustSend":true,
	"encryptToSelf":true,
	"confirmBeforeSend":false,
	"doubleDashSeparator":true,
	"maxIdleMinutes":5,
	"keyserver":"wwwkeys.pgp.net",
	"autoDecrypt":true,
	"captureWebMail":false,
	"useMimeExperimental":false,
	"parseAllHeaders":true,
	"show_headers":1,
	"hushMailSupport":false,
	"encryptAttachments":1,
	"inlineAttachAsciiArmor":false,
	"inlineAttachExt":".pgp",
	"handleDoubleClick":false,
	"sendImmediately":true,
	"keepSettingsForReply":false,
	"recipientsSelectionOption":1
	};

	var gEnigLogLevel = 2; // Output only errors/warnings by default
	var gEnigDebugLog;

	var gEnigPrefSvc, gEnigPrefRoot, gPrefEnigmail;
	try {
	gEnigPrefSvc = Components.classes["@mozilla.org/preferences-service;1"]
	.getService(Components.interfaces.nsIPrefService);

	gEnigPrefRoot = gEnigPrefSvc.getBranch(null);
	gPrefEnigmail = gEnigPrefSvc.getBranch(ENIGMAIL_PREFS_ROOT);

	if (EnigGetPref("logDirectory"))
	gEnigLogLevel = 5;

	} catch (ex) {
	ERROR_LOG("enigmailCommon.js: Error in instantiating PrefService\n");
	}

	function EnigGetFrame(win, frameName) {
	DEBUG_LOG("enigmailCommon.js: EnigGetFrame: name="+frameName+"\n");
	dump("direct="+win.frames[frameName]+"\n");
	for (var j=0; j<win.frames.length; j++) {
	dump(win.frames[j].name+"\n");
	if (win.frames[j].name == frameName) {
	return win.frames[j];
	}
	}

	return null;
	}

	var gEnigPromptSvc;

	var gEnigStrBundle;

	// Initializes enigmailCommon
	function EnigInitCommon(id) {
	DEBUG_LOG("enigmailCommon.js: EnigInitCommon: id="+id+"\n");

	gEnigPromptSvc = Components.classes["@mozilla.org/embedcomp/prompt-service;1"].getService(Components.interfaces.nsIPromptService);

	// Do not instantiate ProcessInfo for Prefs
	if (id && (id.indexOf("pref-") == 0))
	return;

	try {
	var processInfo = Components.classes[ENIG_PROCESSINFO_CONTRACTID].getService(Components.interfaces.nsIProcessInfo);

	var nspr_log_modules = processInfo.getEnv("NSPR_LOG_MODULES");

	var matches = nspr_log_modules.match(/enigmailCommon:(\d+)/);

	if (matches && (matches.length > 1)) {
	gEnigLogLevel = matches[1];
	WARNING_LOG("enigmailCommon.js: gEnigLogLevel="+gEnigLogLevel+"\n");
	}

	} catch (ex) {
	dump("enigmailCommon.js: Error in instantiating ProcessInfo\n");
	}

	}

	var gEnigmailSvc;

	function GetEnigmailSvc() {
	// Lazy initialization of enigmail JS component (for efficiency)

	if (gEnigmailSvc) {
	return gEnigmailSvc.initialized ? gEnigmailSvc : null;
	}

	try {
	gEnigmailSvc = Components.classes[ENIG_ENIGMAIL_CONTRACTID].createInstance(Components.interfaces.nsIEnigmail);

	} catch (ex) {
	ERROR_LOG("enigmailCommon.js: Error in instantiating EnigmailService\n");
	return null;
	}

	DEBUG_LOG("enigmailCommon.js: gEnigmailSvc = "+gEnigmailSvc+"\n");

	if (!gEnigmailSvc.initialized) {
	// Initialize enigmail

	var firstInitialization = !gEnigmailSvc.initializationAttempted;

	try {
	// Initialize enigmail
	gEnigmailSvc.initialize(window, gEnigmailVersion, gPrefEnigmail);

	try {
	// Reset alert count to default value
	gPrefEnigmail.clearUserPref("initAlertCount");
	} catch(ex) {
	}

	} catch (ex) {

	if (firstInitialization) {
	// Display initialization error alert
	var errMsg = gEnigmailSvc.initializationError ? gEnigmailSvc.initializationError : "Error in initializing Enigmail service";

	errMsg += "\n\nTo avoid this alert, either fix the problem or uninstall Enigmail using the Edit->Preferences->Privacy&Security->Enigmail menu"

	EnigAlertCount("initAlertCount", "Enigmail: "+errMsg);
	}

	return null;
	}

	var configuredVersion = EnigGetPref("configuredVersion");

	DEBUG_LOG("enigmailCommon.js: GetEnigmailSvc: "+configuredVersion+"\n");

	if (firstInitialization && gEnigmailSvc.initialized &&
	gEnigmailSvc.agentType && gEnigmailSvc.agentType == "pgp") {
	EnigAlert(EnigGetString("pgpNotSupported"));
	}

	if (gEnigmailSvc.initialized && (gEnigmailVersion != configuredVersion)) {
	EnigConfigure();
	}
	}

	if (gEnigmailSvc.logFileStream) {
	gEnigDebugLog = true;
	gEnigLogLevel = 5;
	}

	return gEnigmailSvc.initialized ? gEnigmailSvc : null;
	}


	function EnigUpdate_0_60() {
	DEBUG_LOG("enigmailCommon.js: EnigUpdate_0_60: \n");

	var savePrefs = false;

	try {
	var userIdSource = gPrefEnigmail.getIntPref("userIdSource");

	gPrefEnigmail.deleteBranch("userIdSource");
	savePrefs = true;

	if (!EnigGetPref("userIdFromAddr")) {

	var userIdFromAddr = false;

	if (userIdSource > 1) {
	userIdFromAddr = true;

	} else {
	var userIdValue = EnigGetPref("userIdValue");

	var mesg = EnigGetString("specifyEmail");

	var valueObj = new Object();
	valueObj.value = userIdValue;

	if (EnigPromptValue(mesg, valueObj)) {
	userIdValue = valueObj.value;
	EnigSetPref("userIdValue", userIdValue);
	}

	userIdFromAddr = !userIdValue;

	if (userIdFromAddr)
	EnigAlert(EnigGetString("usingFrom"));
	else
	EnigAlert(EnigGetString("usingId",userIdValue));

	}

	EnigSetPref("userIdFromAddr", userIdFromAddr);
	}

	} catch (ex) {}

	try {
	var defaultEncryptMsg = gPrefEnigmail.getBoolPref("defaultEncryptMsg");

	gPrefEnigmail.deleteBranch("defaultEncryptMsg");
	savePrefs = true;
	} catch (ex) {}

	try {
	var defaultEncryptSignMsg = gPrefEnigmail.getBoolPref("defaultEncryptSignMsg");
	gPrefEnigmail.deleteBranch("defaultEncryptSignMsg");
	savePrefs = true;

	if (defaultEncryptSignMsg)
	gPrefEnigmail.setIntPref("defaultEncryptionOption", 2);

	} catch (ex) {}

	if (savePrefs) {
	DEBUG_LOG("enigmailCommon.js: EnigUpdate_0_60: Updating prefs\n");
	EnigSavePrefs();
	}
	}

	function EnigUpdate_0_80() {
	try {
	var oldVer=EnigGetPref("configuredVersion");

	if (oldVer.substring(0,4)<"0.81") {
	window.openDialog("chrome://enigmail/content/enigmailUpgrade.xul",
	"", "dialog,modal,centerscreen");
	}
	}
	catch (ex) {}
	}

	function EnigConfigure() {
	try {
	// Updates for specific versions (to be cleaned-up periodically)
	EnigUpdate_0_60();
	EnigUpdate_0_80();
	} catch (ex) {}

	var msg = EnigGetString("configNow",gEnigmailVersion);

	var checkValueObj = new Object();
	checkValueObj.value = false;

	var buttonPressed = gEnigPromptSvc.confirmEx(window,
	EnigGetString("configEnigmail"),
	msg,
	ENIG_THREE_BUTTON_STRINGS,
	EnigGetString("dlgYes"),
	EnigGetString("dlgNo"),
	EnigGetString("dlgNever"),
	"",
	checkValueObj);

	DEBUG_LOG("enigmailCommon.js: EnigConfigure: "+buttonPressed+" \n");

	if (buttonPressed == 1) // Configure later
	return;

	for (var prefName in gEnigmailPrefDefaults) {
	if (prefName.search(/AlertCount$/) >= 0) {
	// Reset alert count to default value
	try {
	gPrefEnigmail.clearUserPref(prefName);
	} catch(ex) {
	}
	}
	}

	if (buttonPressed == 0) {
	// Configure now
	EnigPrefWindow();

	} else {
	// "Do not ask me again" => "already configured"
	EnigSetPref("configuredVersion", gEnigmailVersion);
	EnigSavePrefs();
	}
	}

	///////////////////////////////////////////////////////////////////////////////
	// File read/write operations


	const ENIG_RDONLY = 0x01;
	const ENIG_WRONLY = 0x02;
	const ENIG_CREATE_FILE = 0x08;
	const ENIG_TRUNCATE = 0x20;
	const ENIG_DEFAULT_FILE_PERMS = 0600;

	const EnigInputStream = new Components.Constructor( "@mozilla.org/scriptableinputstream;1", "nsIScriptableInputStream" );

	function EnigCreateFileStream(filePath, permissions) {
	//DEBUG_LOG("enigmailCommon.js: EnigCreateFileStream: file="+filePath+"\n");

	try {
	var localFile = Components.classes[ENIG_LOCAL_FILE_CONTRACTID].createInstance(Components.interfaces.nsILocalFile);

	localFile.initWithPath(filePath);

	if (localFile.exists()) {

	if (localFile.isDirectory() \|\| !localFile.isWritable())
	throw Components.results.NS_ERROR_FAILURE;

	if (!permissions)
	permissions = localFile.permissions;
	}

	if (!permissions)
	permissions = ENIG_DEFAULT_FILE_PERMS;

	var flags = ENIG_WRONLY \| ENIG_CREATE_FILE \| ENIG_TRUNCATE;

	var fileStream = Components.classes[ENIG_LOCALFILEOUTPUTSTREAM_CONTRACTID].createInstance(Components.interfaces.nsIFileOutputStream);

	fileStream.init(localFile, flags, permissions, 0);

	return fileStream;

	} catch (ex) {
	ERROR_LOG("enigmailCommon.js: EnigCreateFileStream: Failed to create "+filePath+"\n");
	return null;
	}
	}

	function EnigWriteFileContents(filePath, data, permissions) {

	//DEBUG_LOG("enigmailCommon.js: EnigWriteFileContents: file="+filePath+"\n");

	try {
	var fileOutStream = EnigCreateFileStream(filePath, permissions);

	if (data.length) {
	if (fileOutStream.write(data, data.length) != data.length)
	throw Components.results.NS_ERROR_FAILURE;

	fileOutStream.flush();
	}
	fileOutStream.close();

	} catch (ex) {
	ERROR_LOG("enigmailCommon.js: EnigWriteFileContents: Failed to write to "+filePath+"\n");
	return false;
	}

	return true;
	}

	// maxBytes == -1 => read everything
	function EnigReadURLContents(url, maxBytes) {
	DEBUG_LOG("enigmailCommon.js: EnigReadURLContents: url="+url+
	", "+maxBytes+"\n");

	var ioServ = Components.classes[ENIG_IOSERVICE_CONTRACTID].getService(Components.interfaces.nsIIOService);
	if (!ioServ)
	throw Components.results.NS_ERROR_FAILURE;

	var fileChannel = ioServ.newChannel(url, null, null)

	var rawInStream = fileChannel.open();

	var scriptableInStream = new EnigInputStream();
	scriptableInStream.init(rawInStream);

	var available = scriptableInStream.available()
	if ((maxBytes < 0) \|\| (maxBytes > available))
	maxBytes = available;

	var urlContents = scriptableInStream.read(maxBytes);

	scriptableInStream.close();

	return urlContents;
	}

	// maxBytes == -1 => read whole file
	function EnigReadFileContents(localFile, maxBytes) {

	DEBUG_LOG("enigmailCommon.js: EnigReadFileContents: file="+localFile.leafName+
	", "+maxBytes+"\n");

	if (!localFile.exists() \|\| !localFile.isReadable())
	throw Components.results.NS_ERROR_FAILURE;


	return EnigReadURLContents("file://"+localFile.path, maxBytes);

	}

	///////////////////////////////////////////////////////////////////////////////

	function WRITE_LOG(str) {
	dump(str);

	if (gEnigDebugLog && gEnigmailSvc && gEnigmailSvc.logFileStream) {
	gEnigmailSvc.logFileStream.write(str, str.length);
	}
	}

	function DEBUG_LOG(str) {
	if (gEnigLogLevel >= 4)
	WRITE_LOG(str);
	}

	function WARNING_LOG(str) {
	if (gEnigLogLevel >= 3)
	WRITE_LOG(str);
	}

	function ERROR_LOG(str) {
	if (gEnigLogLevel >= 2)
	WRITE_LOG(str);
	}

	function CONSOLE_LOG(str) {
	if (gEnigLogLevel >= 3)
	WRITE_LOG(str);

	if (gEnigmailSvc && gEnigmailSvc.console)
	gEnigmailSvc.console.write(str);
	}

	///////////////////////////////////////////////////////////////////////////////

	function EnigAlert(mesg) {
	gEnigPromptSvc.alert(window, EnigGetString("enigAlert"), mesg);
	}

	function EnigAlertCount(countPrefName, mesg) {
	var alertCount = EnigGetPref(countPrefName);

	if (alertCount <= 0)
	return;

	alertCount--;
	EnigSetPref(countPrefName, alertCount);

	if (alertCount > 0) {
	mesg += EnigGetString("repeatPrefix",alertCount) + " ";
	mesg += (alertCount == 1) ? EnigGetString("repeatSuffixSingular") : EnigGetString("repeatSuffixPlural");
	} else {
	mesg += EnigGetString("noRepeat");
	}

	EnigAlert(mesg);
	}

	function EnigConfirm(mesg) {
	return gEnigPromptSvc.confirm(window, EnigGetString("enigConfirm"), mesg);
	}

	function EnigError(mesg) {
	return gEnigPromptSvc.alert(window, EnigGetString("enigError"), mesg);
	}


	function EnigPromptValue(mesg, valueObj) {
	var checkObj = new Object();
	return gEnigPromptSvc.prompt(window, EnigGetString("enigPrompt"),
	mesg, valueObj, "", checkObj);
	}

	function EnigOverrideAttribute(elementIdList, attrName, prefix, suffix) {
	for (var index = 0; index < elementIdList.length; index++) {
	var elementId = elementIdList[index];
	var element = document.getElementById(elementId);
	if (element) {
	try {
	var oldValue = element.getAttribute(attrName);
	var newValue = prefix+elementId+suffix;

	//DEBUG_LOG("enigmailCommon.js: *** overriding id="+ elementId+" "+attrName+"="+oldValue+" with "+newValue+"\n");

	element.setAttribute(attrName, newValue);
	} catch (ex) {}
	} else {
	DEBUG_LOG("enigmailCommon.js: *** UNABLE to override id="+ elementId+"\n");
	}
	}
	}


	function EnigPrefWindow() {
	window.openDialog("chrome://enigmail/content/pref-enigmail.xul",
	"_blank", "chrome,resizable=yes");
	}


	function EnigAdvPrefWindow() {
	EnigAlert("This function doesn't exist anymore!");
	}

	function EnigHelpWindow(source) {

	var helpUrl = "http://enigmail.mozdev.org/help.html";

	if (source)
	helpUrl += "#" + source

	window.open(helpUrl);
	}

	function EnigUpgrade() {
	window.openDialog("http://enigmail.mozdev.org/no_wrap/update.html?upgrade=yes&enigmail="+gEnigmailVersion+"&enigmime="+gEnigmimeVersion, "dialog");
	}

	function EnigShowHeadersAll(status) {
	DEBUG_LOG("enigmailCommon.js: EnigShowHeadersAll: "+status+"\n");

	if (status && EnigGetPref("parseAllHeaders")) {
	// Show all mail headers
	gEnigPrefRoot.setIntPref("mail.show_headers", 2);

	} else {
	// Reset mail.show_headers pref to "original" value
	gEnigPrefRoot.setIntPref("mail.show_headers",
	EnigGetPref("show_headers"));
	}
	}

	function EnigDisplayRadioPref(prefName, prefValue, optionElementIds) {
	DEBUG_LOG("enigmailCommon.js: EnigDisplayRadioPref: "+prefName+", "+prefValue+"\n");

	if (prefValue >= optionElementIds.length)
	return;

	var groupElement = document.getElementById("enigmail_"+prefName);
	var optionElement = document.getElementById(optionElementIds[prefValue]);

	if (groupElement && optionElement) {
	groupElement.selectedItem = optionElement;
	groupElement.value = prefValue;
	}
	}

	function EnigSetRadioPref(prefName, optionElementIds) {
	DEBUG_LOG("enigmailCommon.js: EnigSetRadioPref: "+prefName+"\n");

	var groupElement = document.getElementById("enigmail_"+prefName);
	if (groupElement) {
	var optionElement = groupElement.selectedItem;

	var prefValue = optionElement.value;
	if (prefValue < optionElementIds.length) {
	EnigSetPref(prefName, prefValue);
	groupElement.value = prefValue;
	}
	}
	}

	function EnigSetDefaultPrefs() {
	DEBUG_LOG("enigmailCommon.js: EnigSetDefaultPrefs\n");
	for (var prefName in gEnigmailPrefDefaults) {
	var prefValue = EnigGetPref(prefName);
	}
	}

	function EnigSavePrefs() {
	DEBUG_LOG("enigmailCommon.js: EnigSavePrefs\n");
	try {
	gEnigPrefSvc.savePrefFile(null);
	} catch (ex) {
	}
	}

	function EnigGetPref(prefName) {
	var defaultValue = gEnigmailPrefDefaults[prefName];

	var prefValue = defaultValue;
	try {
	// Get pref value
	switch (typeof defaultValue) {
	case "boolean":
	prefValue = gPrefEnigmail.getBoolPref(prefName);
	break;

	case "number":
	prefValue = gPrefEnigmail.getIntPref(prefName);
	break;

	case "string":
	prefValue = gPrefEnigmail.getCharPref(prefName);
	break;

	default:
	prefValue = undefined;
	break;
	}

	} catch (ex) {
	// Failed to get pref value; set pref to default value
	switch (typeof defaultValue) {
	case "boolean":
	gPrefEnigmail.setBoolPref(prefName, defaultValue);
	break;

	case "number":
	gPrefEnigmail.setIntPref(prefName, defaultValue);
	break;

	case "string":
	gPrefEnigmail.setCharPref(prefName, defaultValue);
	break;

	default:
	break;
	}
	}

	//DEBUG_LOG("enigmailCommon.js: EnigGetPref: "+prefName+"="+prefValue+"\n");
	return prefValue;
	}

	function EnigSetPref(prefName, value) {
	DEBUG_LOG("enigmailCommon.js: EnigSetPref: "+prefName+", "+value+"\n");

	var defaultValue = gEnigmailPrefDefaults[prefName];

	var retVal = false;

	switch (typeof defaultValue) {
	case "boolean":
	gPrefEnigmail.setBoolPref(prefName, value);
	retVal = true;
	break;

	case "number":
	gPrefEnigmail.setIntPref(prefName, value);
	retVal = true;
	break;

	case "string":
	gPrefEnigmail.setCharPref(prefName, value);
	retVal = true;
	break;

	default:
	break;
	}

	return retVal;
	}


	function EnigRequestObserver(terminateFunc, terminateArg)
	{
	this._terminateFunc = terminateFunc;
	this._terminateArg = terminateArg;
	}

	EnigRequestObserver.prototype = {

	_terminateFunc: null,
	_terminateArg: null,

	QueryInterface: function (iid) {
	if (!iid.equals(Components.interfaces.nsIRequestObserver) &&
	!iid.equals(Components.interfaces.nsISupports))
	throw Components.results.NS_ERROR_NO_INTERFACE;
	return this;
	},

	onStartRequest: function (channel, ctxt)
	{
	DEBUG_LOG("enigmailCommon.js: EnigRequestObserver.onStartRequest\n");
	},

	onStopRequest: function (channel, ctxt, status)
	{
	DEBUG_LOG("enigmailCommon.js: EnigRequestObserver.onStopRequest: "+ctxt+"\n");
	this._terminateFunc(this._terminateArg, ctxt);
	}
	}


	function EnigConvertFromUnicode(text, charset) {
	DEBUG_LOG("enigmailCommon.js: EnigConvertFromUnicode: "+charset+"\n");

	if (!text \|\| !charset \|\| (charset.toLowerCase() == "iso-8859-1"))
	return text;

	// Encode plaintext
	try {
	var unicodeConv = Components.classes[ENIG_ISCRIPTABLEUNICODECONVERTER_CONTRACTID].getService(Components.interfaces.nsIScriptableUnicodeConverter);

	unicodeConv.charset = charset;
	return unicodeConv.ConvertFromUnicode(text);

	} catch (ex) {
	return text;
	}
	}


	function EnigConvertToUnicode(text, charset) {
	DEBUG_LOG("enigmailCommon.js: EnigConvertToUnicode: "+charset+"\n");

	if (!text \|\| !charset \|\| (charset.toLowerCase() == "iso-8859-1"))
	return text;

	// Encode plaintext
	try {
	var unicodeConv = Components.classes[ENIG_ISCRIPTABLEUNICODECONVERTER_CONTRACTID].getService(Components.interfaces.nsIScriptableUnicodeConverter);

	unicodeConv.charset = charset;
	return unicodeConv.ConvertToUnicode(text);

	} catch (ex) {
	return text;
	}
	}


	function EnigGetDeepText(node, findStr) {

	DEBUG_LOG("enigmailCommon.js: EnigDeepText: <" + node.tagName + ">, '"+findStr+"'\n");

	/*
	try {
	var enigMimeService = Components.classes[ENIG_ENIGMIMESERVICE_CONTRACTID].getService(Components.interfaces.nsIEnigMimeService);

	var plainText = enigMimeService.getPlainText(node, findStr);
	return plainText;

	} catch (ex) {
	DEBUG_LOG("enigmailCommon.js: EnigDeepText: Failed to access EnigMimeService\n");
	}
	*/

	if (findStr) {
	if (node.innerHTML.replace(/ /g, " ").indexOf(findStr) < 0) {
	// exit immediately if findStr is not found at all
	return "";
	}
	}

	// EnigDumpHTML(node);

	var plainText = EnigParseChildNodes(node);
	// Replace non-breaking spaces with plain spaces
	plainText = plainText.replace(/\xA0/g," ");

	if (findStr) {
	if (plainText.indexOf(findStr) < 0) {
	return "";
	}
	}


	return plainText;

	}

	// extract the plain text by iterating recursively through all nodes
	function EnigParseChildNodes(node) {

	var plainText="";

	if (node.nodeType == Node.TEXT_NODE) {
	// text node
	plainText = plainText.concat(node.data);
	}
	else {

	if (node.nodeType == Node.ELEMENT_NODE) {
	if (node.tagName=="IMG" && node.className=="moz-txt-smily") {
	// get the "alt" part of graphical smileys to ensure correct
	// verification of signed messages
	if (node.getAttribute("alt")) {
	plainText = plainText.concat(node.getAttribute("alt"));
	}
	}
	}

	var child = node.firstChild;
	// iterate over child nodes
	while (child) {
	if (! (child.nodeType == Node.ELEMENT_NODE &&
	child.tagName == "BR" &&
	! child.hasChildNodes())) {
	// optimization: don't do an extra loop for the very frequent <BR> elements
	plainText = plainText.concat(EnigParseChildNodes(child));
	}
	child = child.nextSibling;
	}
	}

	return plainText;
	}


	// Dump HTML content as plain text
	function EnigDumpHTML(node)
	{
	var type = node.nodeType;
	if (type == Node.ELEMENT_NODE) {

	// open tag
	DEBUG_LOG("<" + node.tagName)

	// dump the attributes if any
	attributes = node.attributes;
	if (null != attributes) {
	var countAttrs = attributes.length;
	var index = 0
	while(index < countAttrs) {
	att = attributes[index];
	if (null != att) {
	DEBUG_LOG(" "+att.name+"='"+att.value+"'")
	}
	index++
	}
	}

	// close tag
	DEBUG_LOG(">")

	// recursively dump the children
	if (node.hasChildNodes()) {
	// get the children
	var children = node.childNodes;
	var length = children.length;
	var count = 0;
	while(count < length) {
	var child = children[count]
	EnigDumpHTML(child)
	count++
	}
	DEBUG_LOG("</" + node.tagName + ">");
	}


	}
	// if it's a piece of text just dump the text
	else if (type == Node.TEXT_NODE) {
	DEBUG_LOG(node.data)
	}
	}

	/////////////////////////
	// Console stuff
	/////////////////////////


	function EnigClearPassphrase() {
	DEBUG_LOG("enigmailCommon.js: EnigClearPassphrase: \n");

	var enigmailSvc = GetEnigmailSvc();
	if (!enigmailSvc)
	return;

	enigmailSvc.clearCachedPassphrase();
	}

	function EnigViewAbout() {
	DEBUG_LOG("enigmailCommon.js: EnigViewAbout\n");

	toOpenWindowByType("enigmail:about",
	"chrome://enigmail/content/enigmailAbout.xul");
	}

	function EnigViewConsole() {
	DEBUG_LOG("enigmailCommon.js: EnigViewConsole\n");

	toOpenWindowByType("enigmail:console",
	"chrome://enigmail/content/enigmailConsole.xul");
	}

	function EnigViewDebugLog() {
	DEBUG_LOG("enigmailCommon.js: EnigViewDebugLog\n");

	var logDirectory = EnigGetPref("logDirectory");

	if (!logDirectory) {
	EnigAlert(EnigGetString("noLogDir"));
	return;
	}

	if (!gEnigmailSvc) {
	EnigAlert(EnigGetString("noLogFile"));
	return;
	}

	if (!gEnigmailSvc.logFileStream) {
	EnigAlert(EnigGetString("restartForLog"));
	return;
	}

	gEnigmailSvc.logFileStream.flush();

	logDirectory = logDirectory.replace(/\\/g, "/");

	var logFileURL = "file:///" + logDirectory + "/enigdbug.txt";

	window.open(logFileURL, 'Enigmail Debug Log');
	}

	function EnigKeygen() {
	DEBUG_LOG("enigmailCommon.js: EnigKeygen\n");

	window.openDialog('chrome://enigmail/content/enigmailKeygen.xul',
	'Enigmail Key Generation',
	'chrome,dialog,close=no,resizable=yes,width=600');

	}

	// retrieves the most recent navigator window (opens one if need be)
	function EnigLoadURLInNavigatorWindow(url, aOpenFlag)
	{
	DEBUG_LOG("enigmailCommon.js: EnigLoadURLInNavigatorWindow: "+url+", "+aOpenFlag+"\n");

	var navWindow;

	// if this is a browser window, just use it
	if ("document" in top) {
	var possibleNavigator = top.document.getElementById("main-window");
	if (possibleNavigator &&
	possibleNavigator.getAttribute("windowtype") == "navigator:browser")
	navWindow = top;
	}

	// if not, get the most recently used browser window
	if (!navWindow) {
	var wm;
	try {
	// Mozilla up to 1.0
	wm = Components.classes[ENIG_WMEDIATOR_CONTRACTID].getService(Components.interfaces.nsIWindowMediator);
	}
	catch (ex) {
	// Mozilla 1.1 and newer
	wm = Components.classes[ENIG_APPSHELL_MEDIATOR_CONTRACTID].getService(Components.interfaces.nsIWindowMediator);
	}
	navWindow = wm.getMostRecentWindow("navigator:browser");
	}

	if (navWindow) {

	if ("loadURI" in navWindow)
	navWindow.loadURI(url);
	else
	navWindow._content.location.href = url;

	} else if (aOpenFlag) {
	// if no browser window available and it's ok to open a new one, do so
	navWindow = window.open(url, "Enigmail");
	}

	DEBUG_LOG("enigmailCommon.js: EnigLoadURLInNavigatorWindow: navWindow="+navWindow+"\n");

	return navWindow;
	}

	// retrieves a localized string from the enigmail.properties stringbundle
	function EnigGetString(aStr) {
	var restCount = arguments.length - 1;
	if(!gEnigStrBundle) {
	try {
	var strBundleService = Components.classes[ENIG_STRINGBUNDLE_CONTRACTID].getService();
	strBundleService = strBundleService.QueryInterface(nsIEnigStrBundle);
	gEnigStrBundle = strBundleService.createBundle("chrome://enigmail/locale/enigmail.properties");
	} catch (ex) {
	ERROR_LOG("enigmailCommon.js: Error in instantiating stringBundleService\n");
	}
	}
	if(gEnigStrBundle) {
	try {
	if(restCount > 0) {
	var subPhrases = new Array();
	for (var i = 1; i < arguments.length; i++) {
	subPhrases.push(arguments[i]);
	}
	return gEnigStrBundle.formatStringFromName(aStr, subPhrases, subPhrases.length);
	}
	else {
	return gEnigStrBundle.GetStringFromName(aStr);
	}
	} catch (ex) {
	ERROR_LOG("enigmailCommon.js: Error in querying stringBundleService for string '"+aStr+"'\n");
	}
	}
	return null;
	}

	// Remove all quoted strings (and angle brackets) from a list of email
	// addresses, returning a list of pure email addresses
	function enigStripEmail(mailAddrs) {

	var qStart, qEnd;
	while ((qStart = mailAddrs.indexOf('"')) != -1) {
	qEnd = mailAddrs.indexOf('"', qStart+1);
	if (qEnd == -1) {
	ERROR_LOG("enigmailMsgComposeOverlay.js: enigStripEmail: Unmatched quote in mail address: "+mailAddrs+"\n");
	throw Components.results.NS_ERROR_FAILURE;
	}

	mailAddrs = mailAddrs.substring(0,qStart) + mailAddrs.substring(qEnd+1);
	}

	// Eliminate all whitespace, just to be safe
	mailAddrs = mailAddrs.replace(/\s+/g,"");

	// Extract pure e-mail address list (stripping out angle brackets)
	mailAddrs = mailAddrs.replace(/(^\|,)[^,]<([^>]+)>[^,]/g,"$1$2");

	return mailAddrs;
	}


	//get path for temporary directory (e.g. /tmp, C:\TEMP)
	function EnigGetTempDir() {
	var tmpDir;

	try {
	var ds = Components.classes[ENIG_DIRSERVICE_CONTRACTID].getService();
	var dsprops = ds.QueryInterface(Components.interfaces.nsIProperties);
	var tmpDirComp = dsprops.get(ENIG_TEMPDIR_PROP, Components.interfaces.nsILocalFile);
	tmpDir=tmpDirComp.path;
	}
	catch (ex) {
	// let's guess ...
	var httpHandler = ioServ.getProtocolHandler("http");
	httpHandler = httpHandler.QueryInterface(Components.interfaces.nsIHttpProtocolHandler);
	isWin = (httpHandler.platform.search(/Win/i) == 0);
	if (isWin) {
	tmpDir="C:\\TEMP";
	} else {
	tmpDir="/tmp";
	}
	}
	return tmpDir;
	}


	function EnigDisplayPrefs(showDefault, showPrefs, setPrefs) {
	DEBUG_LOG("enigmailCommon.js: EnigDisplayPrefs\n");

	for (var prefName in gEnigmailPrefDefaults) {
	var prefElement = document.getElementById("enigmail_"+prefName);

	if (prefElement) {
	var defaultValue = gEnigmailPrefDefaults[prefName];
	var prefValue = showDefault ? defaultValue : EnigGetPref(prefName);

	DEBUG_LOG("enigmailCommon.js: EnigDisplayPrefs: "+prefName+"="+prefValue+"\n");

	switch (typeof defaultValue) {
	case "boolean":
	if (showPrefs) {
	if (prefValue) {
	prefElement.setAttribute("checked", "true");
	} else {
	prefElement.removeAttribute("checked");
	}
	}

	if (setPrefs) {
	if (prefElement.checked) {
	EnigSetPref(prefName, true);
	} else {
	EnigSetPref(prefName, false);
	}
	}

	break;

	case "number":
	if (showPrefs)
	prefElement.value = prefValue;

	if (setPrefs) {
	try {
	EnigSetPref(prefName, 0+prefElement.value);
	} catch (ex) {
	}
	}
	break;

	case "string":
	if (showPrefs)
	prefElement.value = prefValue;
	if (setPrefs)
	EnigSetPref(prefName, prefElement.value);
	break;

	default:
	}
	}
	}
	}

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