enigmailMsgComposeOverlay.js
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enigmailMsgComposeOverlay.js
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	// Uses: chrome://enigmail/content/enigmailCommon.js

	// nsIDocumentEncoder.h:
	const OutputSelectionOnly = 1;
	const OutputFormatted = 2;
	const OutputRaw = 4;
	const OutputPreformatted = 16;
	const OutputWrap = 32;
	const OutputFormatFlowed = 64;
	const OutputCRLineBreak = 512;
	const OutputLFLineBreak = 1024;

	// Initialize enigmailCommon
	EnigInitCommon("enigmailMsgComposeOverlay");

	window.addEventListener("load", enigMsgComposeStartup, false);

	var gDecryptTimeoutID;

	var gEditorElement, gEditorShell;

	var gEnigProcessed = null;

	var gOrigSendButton, gEnigSendButton;

	function enigMsgComposeStartup() {
	DEBUG_LOG("enigmailMsgComposeOverlay.js: enigMsgComposeStartup\n");
	gDecryptTimeoutID = null;

	gOrigSendButton = document.getElementById("button-send");
	gEnigSendButton = document.getElementById("button-enigmail-send");

	// Get editor shell
	gEditorElement = document.getElementById("content-frame");
	DEBUG_LOG("enigmailMsgComposeOverlay.js: gEditorElement = "+gEditorElement+"\n");

	gEditorShell = gEditorElement.editorShell;
	DEBUG_LOG("enigmailMsgComposeOverlay.js: gEditorShell = "+gEditorShell+"\n");
	var docStateListener = new DocumentStateListener();
	gEditorShell.RegisterDocumentStateListener(docStateListener);

	enigUpdateOptionsDisplay();
	}

	function enigUpdateOptionsDisplay() {
	DEBUG_LOG("enigmailMsgComposeOverlay.js: enigUpdateOptionsDisplay: \n");
	var optList = ["defaultEncryptMsg", "defaultSignMsg", "confirmBeforeSend"];

	var signOrEncrypt = false;

	for (var j=0; j<optList.length; j++) {
	var optName = optList[j];
	var optValue = EnigGetPref(optName);

	if (optValue && ((optName == "defaultEncryptMsg") \|\|
	(optName == "defaultSignMsg")) )
	signOrEncrypt = true;

	var menuElement = document.getElementById("enigmail_"+optName);

	menuElement.setAttribute("checked", optValue ? "true" : "false");
	}

	if (signOrEncrypt) {
	gEnigSendButton.removeAttribute("collapsed");
	gOrigSendButton.setAttribute("collapsed", "true");

	} else {
	gOrigSendButton.removeAttribute("collapsed");
	gEnigSendButton.setAttribute("collapsed", "true");
	}
	}

	function enigInsertKey() {
	DEBUG_LOG("enigmailMsgComposeOverlay.js: enigInsertKey: \n");

	var userIdValue = EnigGetPref("userIdValue");

	if (EnigGetPref("userIdSource") == USER_ID_FROMADDR) {
	try {
	var currentId = getCurrentIdentity();
	userIdValue = currentId.email;
	} catch (ex) {
	}
	}

	var text = "User Ids (email addresses) of keys to export";
	var retObj = new Object();
	var checkObj = new Object();

	if (userIdValue)
	retObj.value = userIdValue;

	var proceed = gPromptService.prompt(window, "Enigmail Key Export",
	text, retObj, "", checkObj);

	userIdValue = retObj.value;

	if (!proceed \|\| !userIdValue)
	return;

	// Replace commas with spaces
	userIdValue = userIdValue.replace(/,/g, " ");

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

	var exitCodeObj = new Object();
	var errorMsgObj = new Object();

	var uiFlags = nsIEnigmail.UI_INTERACTIVE;
	var keyBlock = enigmailSvc.extractKey(window, uiFlags, userIdValue,
	exitCodeObj, errorMsgObj);
	var exitCode = exitCodeObj.value;

	if (!keyBlock \|\| (exitCode != 0)) {
	// Error processing
	var errorMsg = errorMsgObj.value;
	EnigAlert(errorMsg);
	return;
	}

	gEditorShell.InsertText("Public key for "+userIdValue+"\n" + keyBlock);
	}

	function enigUndoEncryption() {
	DEBUG_LOG("enigmailMsgComposeOverlay.js: enigUndoEncryption: \n");

	if (gEnigProcessed) {

	gEditorShell.SelectAll();

	var directionFlags = 0; // see nsIEditor.h
	gEditorShell.DeleteSelection(directionFlags);

	gEditorShell.InsertText(gEnigProcessed.plainText);

	gEnigProcessed = null;

	} else {
	enigDecryptQuote(true);
	}
	}

	function enigSend(encryptFlags) {
	DEBUG_LOG("enigmailMsgComposeOverlay.js: enigSend: "+encryptFlags+"\n");

	if (gWindowLocked) {
	EnigAlert("Compose window is locked; send cancelled\n");
	return;
	}

	var enigmailSvc = GetEnigmailSvc();
	if (!enigmailSvc) {
	if (EnigConfirm("Failed to initialize Enigmail.\nSend unencrypted email?"))
	goDoCommand('cmd_sendButton');

	return;
	}

	try {
	var currentId = getCurrentIdentity();
	DEBUG_LOG("enigmailMsgComposeOverlay.js: enigSend: currentId="+currentId+
	", "+currentId.email+"\n");

	var defaultSend = encryptFlags & nsIEnigmail.DEFAULT_SEND;
	if (defaultSend) {

	if (EnigGetPref("defaultSignMsg"))
	encryptFlags \|= nsIEnigmail.SIGN_MESSAGE;

	if (EnigGetPref("defaultEncryptMsg"))
	encryptFlags \|= nsIEnigmail.ENCRYPT_MESSAGE;
	}

	var signMsg = encryptFlags & nsIEnigmail.SIGN_MESSAGE;
	var encryptMsg = encryptFlags & nsIEnigmail.ENCRYPT_MESSAGE;

	var msgCompFields = gMsgCompose.compFields;
	Recipients2CompFields(msgCompFields);

	// Check if sending to any newsgroups
	var newsgroups = msgCompFields.newsgroups;

	if (newsgroups && defaultSend) {
	// Do not encrypt by default if sending to newsgroups
	encryptFlags &= ~nsIEnigmail.ENCRYPT_MESSAGE;
	encryptMsg = false;

	if (!EnigGetPref("defaultSignNewsMsg")) {
	// Do not sign by default if sending to any newsgroup
	encryptFlags &= ~nsIEnigmail.SIGN_MESSAGE;
	signMsg = false;
	}
	}

	DEBUG_LOG("enigmailMsgComposeOverlay.js: enigSend: gMsgCompose="+gMsgCompose+"\n");

	var toAddrList = [];

	if (msgCompFields.to) toAddrList.push(msgCompFields.to);

	if (msgCompFields.cc) toAddrList.push(msgCompFields.cc);
	if (msgCompFields.bcc) toAddrList.push(msgCompFields.bcc);

	var toAddr = toAddrList.join(", ");

	if (newsgroups) toAddrList.push(newsgroups);

	var toAddrAll = toAddrList.join(", ");;

	DEBUG_LOG("enigmailMsgComposeOverlay.js: enigSend: toAddrAll="+toAddrAll+"\n");

	if (!gEnigProcessed && (signMsg \|\| encryptMsg)) {

	var fromAddr = currentId.email;

	var userIdSource = EnigGetPref("userIdSource");
	DEBUG_LOG("enigmailMsgComposeOverlay.js: userIdSource = "+userIdSource+"\n");

	if (userIdSource == USER_ID_DEFAULT) {
	fromAddr = "";

	} else if (userIdSource == USER_ID_SPECIFIED) {
	fromAddr = EnigGetPref("userIdValue");
	}

	if (EnigGetPref("alwaysTrustSend"))
	encryptFlags \|= nsIEnigmail.ALWAYS_TRUST_SEND;

	if (EnigGetPref("encryptToSelf")) {
	encryptFlags \|= nsIEnigmail.ENCRYPT_TO_SELF;
	}

	///var editorDoc = gEditorShell.editorDocument;
	///DEBUG_LOG("enigmailMsgComposeOverlay.js: Doc = "+editorDoc+"\n");
	///EnigDumpHTML(editorDoc.documentElement);

	if (gMsgCompose.composeHTML) {
	var errMsg = "HTML mail warning:\nThis message may contain HTML, which could cause signing/encryption to fail. To avoid this in the future, you should press the SHIFT key when clicking on the Compose/Reply button to send signed mail.\nIf you sign mail by default, you should uncheck the 'Compose Messages in HTML' preference box to permanently disable HTML mail for this mail account."

	EnigAlertCount("composeHtmlAlertCount", errMsg);
	}

	try {
	var convert = DetermineConvertibility();
	if (convert == nsIMsgCompConvertible.No) {
	if (!EnigConfirm("Message contains HTML formatting information that will be lost when converting to plain text for signing/encryption. Do you wish to proceed?\n"))
	return;
	}
	} catch (ex) {
	}

	// Get plain text

	// (Do we need to set nsIDocumentEncoder::* flags?)
	var encoderFlags = OutputFormatted;
	var docText = gEditorShell.GetContentsAs("text/plain", encoderFlags);
	//DEBUG_LOG("enigmailMsgComposeOverlay.js: docText["+encoderFlags+"] = '"+docText+"'\n");

	var sendFlowed;
	try {
	sendFlowed = gPrefMailNews.getBoolPref("send_plaintext_flowed");
	} catch (ex) {
	sendFlowed = true;
	}

	if (sendFlowed) {
	// Prevent space stuffing a la RFC 2646 (format=flowed).

	// MULTILINE MATCHING ON
	RegExp.multiline = true;

	docText = docText.replace(/^From /g, "~From ");
	docText = docText.replace(/^>/g, "\|");
	docText = docText.replace(/^[ \t]+$/g, "");
	docText = docText.replace(/^ /g, "~ ");

	// MULTILINE MATCHING OFF
	RegExp.multiline = false;
	}

	//DEBUG_LOG("enigmailMsgComposeOverlay.js: docText = '"+docText+"'\n");

	gEditorShell.SelectAll();

	var directionFlags = 0; // see nsIEditor.h
	gEditorShell.DeleteSelection(directionFlags);

	gEditorShell.InsertText(docText);

	encoderFlags = OutputWrap \| OutputCRLineBreak \| OutputLFLineBreak;

	var plainText = gEditorShell.GetContentsAs("text/plain", encoderFlags);

	//DEBUG_LOG("enigmailMsgComposeOverlay.js: plainText["+encoderFlags+"] = '"+plainText+"'\n");

	if (!plainText) {
	encryptFlags = 0;
	signMsg = false;
	encryptMsg = false;

	} else {
	// Encrypt plaintext
	var exitCodeObj = new Object();
	var errorMsgObj = new Object();
	var uiFlags = nsIEnigmail.UI_INTERACTIVE;

	var cipherText = enigmailSvc.encryptMessage(window,uiFlags, plainText,
	fromAddr, toAddr, encryptFlags,
	exitCodeObj, errorMsgObj);

	var exitCode = exitCodeObj.value;

	if ((exitCode != 0) && defaultSend && encryptMsg) {
	// Default send error; turn off encryption
	encryptFlags &= ~nsIEnigmail.ENCRYPT_MESSAGE;
	encryptMsg = false;

	if (signMsg) {
	// Try signing only, to see if it removes the error condition
	cipherText = enigmailSvc.encryptMessage(window,uiFlags, plainText,
	fromAddr, toAddr, encryptFlags,
	exitCodeObj, errorMsgObj);

	exitCode = exitCodeObj.value;
	}
	}

	if (cipherText && (exitCode == 0)) {
	// Encryption/signing succeeded; overwrite plaintext
	gEditorShell.SelectAll();

	gEditorShell.InsertText(cipherText);

	gEnigProcessed = {"plainText":plainText};

	} else if (signMsg \|\| encryptMsg) {
	// Encryption/signing failed
	var errorMsg = errorMsgObj.value;
	EnigAlert("Error in encrypting and/or signing message. Send operation aborted.\n"+errorMsg);
	return;
	}
	}
	}

	// EnigSend: Handle both plain and encrypted messages below
	if (gIsOffline) {
	if (!EnigConfirm("You are currently offline. Do you wish to save the message in the Unsent Messages folder?\n")) {

	if (gEnigProcessed)
	enigUndoEncryption();

	return;
	}

	enigGenericSendMessage(nsIMsgCompDeliverMode.Later);
	return;
	}

	if (EnigGetPref("confirmBeforeSend")) {
	var msgStatus = "";

	if (signMsg)
	msgStatus += "SIGNED ";

	if (encryptMsg)
	msgStatus += "ENCRYPTED ";

	if (!msgStatus)
	msgStatus = "PLAINTEXT ";

	if (!EnigConfirm("Send "+msgStatus+"message to "+toAddrAll+"?\n")) {
	if (gEnigProcessed)
	enigUndoEncryption();

	return;
	}
	}

	enigGenericSendMessage(nsIMsgCompDeliverMode.Now);

	} catch (ex) {
	if (EnigConfirm("Error in Enigmail; Encryption/signing failed; send unencrypted email?\n"))
	goDoCommand('cmd_sendButton');
	}
	}

	/////////////////////////////////////////////////////////////////////////
	// Call the following function from our version of the function
	// GenericSendMessage from the file MsgComposeCommands.js
	// (after the calls to Recipients2CompFields and Attachements2CompFields)
	/////////////////////////////////////////////////////////////////////////
	function enigModifyCompFields(msgCompFields) {
	var enigmailHeaders = "X-Enigmail-Version: "+gEnigmailVersion+"\r\n";
	msgCompFields.otherRandomHeaders += enigmailHeaders;

	DEBUG_LOG("enigmailMsgComposeOverlay.js: enigModifyCompFields: otherRandomHeaders = "+
	msgCompFields.otherRandomHeaders+"\n");
	}


	// Modified version of GenericSendMessage from the file MsgComposeCommands.js
	function enigGenericSendMessage( msgType )
	{
	dump("enigGenericSendMessage from XUL\n");

	dump("Identity = " + getCurrentIdentity() + "\n");

	if (gMsgCompose != null)
	{
	var msgCompFields = gMsgCompose.compFields;
	if (msgCompFields)
	{
	Recipients2CompFields(msgCompFields);
	var subject = document.getElementById("msgSubject").value;
	msgCompFields.subject = subject;
	Attachments2CompFields(msgCompFields);

	/////////////////////////////////////////////////////////////////////////
	// Call the following function from our version of the function
	// GenericSendMessage from the file MsgComposeCommands.js
	// (after the calls to Recipients2CompFields and Attachements2CompFields)
	/////////////////////////////////////////////////////////////////////////
	enigModifyCompFields(msgCompFields);
	/////////////////////////////////////////////////////////////////////////

	if (msgType == nsIMsgCompDeliverMode.Now \|\| msgType == nsIMsgCompDeliverMode.Later)
	{
	//Do we need to check the spelling?
	if (sPrefs.getBoolPref("mail.SpellCheckBeforeSend")){
	//We disable spellcheck for the following -subject line, attachment pane, identity and addressing widget
	//therefore we need to explicitly focus on the mail body when we have to do a spellcheck.
	editorShell.contentWindow.focus();
	goDoCommand('cmd_spelling');
	}

	//Check if we have a subject, else ask user for confirmation
	if (subject == "")
	{
	if (gPromptService)
	{
	var result = {value:sComposeMsgsBundle.getString("defaultSubject")};
	if (gPromptService.prompt(
	window,
	sComposeMsgsBundle.getString("subjectDlogTitle"),
	sComposeMsgsBundle.getString("subjectDlogMessage"),
	result,
	null,
	{value:0}
	))
	{
	msgCompFields.subject = result.value;
	var subjectInputElem = document.getElementById("msgSubject");
	subjectInputElem.value = result.value;
	}
	else
	return;
	}
	}

	// Before sending the message, check what to do with HTML message, eventually abort.
	var convert = DetermineConvertibility();
	var action = DetermineHTMLAction(convert);
	if (action == nsIMsgCompSendFormat.AskUser)
	{
	var recommAction = convert == nsIMsgCompConvertible.No
	? nsIMsgCompSendFormat.AskUser
	: nsIMsgCompSendFormat.PlainText;
	var result2 = {action:recommAction,
	convertible:convert,
	abort:false};
	window.openDialog("chrome://messenger/content/messengercompose/askSendFormat.xul",
	"askSendFormatDialog", "chrome,modal,titlebar,centerscreen",
	result2);
	if (result2.abort)
	return;
	action = result2.action;
	}
	switch (action)
	{
	case nsIMsgCompSendFormat.PlainText:
	msgCompFields.forcePlainText = true;
	msgCompFields.useMultipartAlternative = false;
	break;
	case nsIMsgCompSendFormat.HTML:
	msgCompFields.forcePlainText = false;
	msgCompFields.useMultipartAlternative = false;
	break;
	case nsIMsgCompSendFormat.Both:
	msgCompFields.forcePlainText = false;
	msgCompFields.useMultipartAlternative = true;
	break;
	default: dump("\###SendMessage Error: invalid action value\n"); return;
	}
	}
	try {
	gWindowLocked = true;
	CommandUpdate_MsgCompose();
	disableEditableFields();

	var progress = Components.classes["@mozilla.org/messenger/progress;1"].createInstance(Components.interfaces.nsIMsgProgress);
	if (progress)
	{
	progress.registerListener(progressListener);
	gSendOrSaveOperationInProgress = true;
	}
	gMsgCompose.SendMsg(msgType, getCurrentIdentity(), progress);
	}
	catch (ex) {
	dump("failed to SendMsg: " + ex + "\n");
	gWindowLocked = false;
	enableEditableFields();
	CommandUpdate_MsgCompose();
	}
	}
	}
	else
	dump("###SendMessage Error: composeAppCore is null!\n");
	}


	function enigToggleAttribute(attrName)
	{
	DEBUG_LOG("enigmailMsgComposeOverlay.js: enigToggleAttribute('"+attrName+"')\n");

	var menuElement = document.getElementById("enigmail_"+attrName);

	var oldValue = EnigGetPref(attrName);
	EnigSetPref(attrName, !oldValue);

	enigUpdateOptionsDisplay();
	}

	function enigDecryptQuote(interactive) {
	DEBUG_LOG("enigmailMsgComposeOverlay.js: enigDecryptQuote: "+interactive+"\n");

	if (gWindowLocked \|\| gEnigProcessed)
	return;

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

	var encoderFlags = OutputPreformatted \| OutputLFLineBreak;

	var docText = gEditorShell.GetContentsAs("text/plain", encoderFlags);

	// START TEMPORARY DEBUG CODE
	var matches = docText.match(/(^\|\n).-----BEGIN.\n/);

	if (matches) {
	WRITE_LOG("enigmailMsgComposeOverlay.js: enigDecryptQuote: TEMPORARY matches[0]='"+matches[0]+"'\n");
	}
	// END TEMPORARY DEBUG CODE

	if (docText.indexOf("-----BEGIN PGP ") < 0)
	return;

	// Determine indentation string
	var matches = docText.match(/(^\|\n)(\s>?\s)-----BEGIN PGP /);

	var indentStr= "";
	if (matches && (matches.length > 2)) {
	indentStr = matches[2];
	}

	DEBUG_LOG("enigmailMsgComposeOverlay.js: enigDecryptQuote: indentStr='"+indentStr+"'\n");

	var beginIndexObj = new Object();
	var endIndexObj = new Object();
	var blockType = enigmailSvc.locateArmoredBlock(docText, 0, indentStr,
	beginIndexObj, endIndexObj);

	if ((blockType != "MESSAGE") && (blockType != "SIGNED MESSAGE"))
	return;

	var beginIndex = beginIndexObj.value;
	var endIndex = endIndexObj.value;

	var head = docText.substr(0, beginIndex);
	var tail = docText.substr(endIndex+1);

	var pgpBlock = docText.substr(beginIndex, endIndex-beginIndex+1);

	var temTail = tail;

	if (indentStr) {
	// Delete indentation
	var indentRegexp = new RegExp("^"+indentStr, "g");

	// MULTILINE MATCHING ON
	RegExp.multiline = true;

	pgpBlock = pgpBlock.replace(indentRegexp, "");
	temTail = tail.replace(indentRegexp, "");

	// MULTILINE MATCHING OFF
	RegExp.multiline = false;
	}

	if (temTail.search(/\S/) < 0) {
	// No non-space characters in tail; delete it
	tail = ""
	}

	//DEBUG_LOG("enigmailMsgComposeOverlay.js: enigDecryptQuote: pgpBlock='"+pgpBlock+"'\n");

	// Decrypt message
	var exitCodeObj = new Object();
	var errorMsgObj = new Object();
	var signStatusObj = new Object();
	signStatusObj.value = "";

	var uiFlags = nsIEnigmail.UI_INTERACTIVE \| nsIEnigmail.UNVERIFIED_ENC_OK;
	var plainText = enigmailSvc.decryptMessage(window, uiFlags, pgpBlock,
	exitCodeObj, errorMsgObj, signStatusObj);
	var exitCode = exitCodeObj.value;

	if (!plainText) {
	if (blockType != "SIGNED MESSAGE")
	return;

	// Extract text portion of clearsign block
	plainText = enigmailSvc.extractSignaturePart(pgpBlock,
	nsIEnigmail.SIGNATURE_TEXT);
	}

	if (exitCode != 0) {
	// Error processing
	var errorMsg = errorMsgObj.value;

	var statusLines = errorMsg.split(/\r?\n/);

	var displayMsg;
	if (statusLines && statusLines.length) {
	// Display only first ten lines of error message
	while (statusLines.length > 10)
	statusLines.pop();

	displayMsg = statusLines.join("\n");

	if (interactive)
	EnigAlert(displayMsg);
	}
	}

	// Replace encrypted quote with decrypted quote

	gEditorShell.SelectAll();
	//var directionFlags = 0; // see nsIEditor.h
	//gEditorShell.DeleteSelection(directionFlags);

	//DEBUG_LOG("enigmailMsgComposeOverlay.js: enigDecryptQuote: plainText='"+plainText+"'\n");

	if (head)
	gEditorShell.InsertText(head);

	var nodeObj = new Object();
	gEditorShell.InsertAsQuotation(plainText, nodeObj);

	if (tail)
	gEditorShell.InsertText(tail);
	}


	function DocumentStateListener()
	{
	}

	DocumentStateListener.prototype = {

	QueryInterface: function (iid) {

	if (!iid.equals(Components.interfaces.nsIDocumentStateListener) &&
	!iid.equals(Components.interfaces.nsISupports))
	throw Components.results.NS_ERROR_NO_INTERFACE;

	return this;
	},

	NotifyDocumentCreated: function ()
	{
	//DEBUG_LOG("enigmailMsgComposeOverlay.js: NotifyDocumentCreated\n");
	},

	NotifyDocumentWillBeDestroyed: function ()
	{
	//DEBUG_LOG("enigmailMsgComposeOverlay.js: NotifyDocumentWillBeDestroyed\n");
	},

	NotifyDocumentStateChanged: function (nowDirty)
	{
	DEBUG_LOG("enigmailMsgComposeOverlay.js: NotifyDocumentStateChanged: "+nowDirty+"\n");

	if (!gDecryptTimeoutID &&
	gMsgCompose.editor.documentEditable &&
	gMsgCompose.editor.documentLength) {
	gDecryptTimeoutID = window.setTimeout(enigDecryptQuote, 10, false);
	}
	}

	}

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