351 lines
11 KiB
JavaScript
351 lines
11 KiB
JavaScript
var Transform = require("stream").Transform;
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var EventEmitter = require("events").EventEmitter;
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var Types = require("types");
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var Buffer = require("buffer");
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var events = require("events");
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//A stream Transform implementation returning full netbeans messages
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function MessageTransform(opts) {
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"use strict";
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Transform.call(this,opts);
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var buffer;
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this._transform = function(data, encoding, callback) {
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var endpos = data.indexOf("\n");
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if (endpos > -1) {
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if (buffer !== undefined) {
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this.push(buffer);
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buffer = undefined;
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}
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if (endpos > 0) {
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this.push(data.substr(0, endpos));
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}
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callback();
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if (endpos < data.length - 1) {
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buffer = data.substr(endpos + 1);
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}
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}
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else {
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buffer = buffer.concat(data);
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}
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};
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this._flush = function (callback) {
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buffer = undefined;
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callback();
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};
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}
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//Main netbeans object. Needs the socket of the incomming connexion and an authentication callback
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//This callback just get the password sent by Vim. It must return true to allow connexion
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function NetbeansClient(socket, authentication) {
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"use strict";
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EventEmitter.call(this);
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var self = this;
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var callbacks = {};
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var currentSeqno = 0;
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var connected = false;
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socket.setEncoding("utf8");
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var messageTransform = new MessageTransform();
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messageTransform.on("data",function (message) {
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/* The first message must be an authentication one */
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if (message.startsWith("AUTH ") && authentication(message.substring(message.indexOf(" ") + 1))) {
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connected = true;
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messageTransform.removeAllListeners("data");
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messageTransform.on("data", function(message) {
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try {
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var iName = 0; /*Index of the name separator in case of an Event */
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var iSeqno = 0; /*Index of the seqno separator in case of an Event */
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/* Header of the message */
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for (var i = 0 ; i < message.length && message[i] !== " "; ++i) {
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if (message[i] === ":") {
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iName = i;
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}
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else if (message[i] === "=") {
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iSeqno = i;
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}
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}
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var isEvent = false;
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var args = [];
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var seqno = 0;
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if (iName > 0 && iSeqno > 0) {
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isEvent = true;
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args.push("event");
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args.push(Number.parseInt(message.substr(0, iName), 10));
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args.push(message.substring(iName + 1, iSeqno));
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args.push(Number.parseInt(message.substring(iSeqno + 1, i), 10));
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}
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else if (iName === 0 && iSeqno === 0) {
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seqno = Number.parseInt(message.substr(0, i), 10);
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}
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else {
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throw "Unknown message type";
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}
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var argStartOffset = ++i;
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//Arguments of the message
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for ( ; i < message.length ; ++i) {
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if (message[i] === "\"" || message[i] === "!") {
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var parsedString = "";
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i += 1;
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while (i < message.length && message[i] !== "\"") {
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if (message[i] === "\\") {
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i += 1;
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if (i < message.length) {
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throw "Unfinished string in message";
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}
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else {
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switch (message[i]) {
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case "n" :
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parsedString += "\n";
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break;
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case "\\" :
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parsedString += "\\";
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break;
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case "\"" :
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parsedString += "\"";
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break;
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case "r" :
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parsedString += "\r";
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break;
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case "t" :
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parsedString += "\t";
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break;
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default :
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throw "Invalid escaped character in string";
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}
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}
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}
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else {
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parsedString += message[i];
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}
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++i;
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}
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args.push(parsedString);
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i += 1;
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}
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else {
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while (i < message.length && message[i] !== " ") {
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i += 1;
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}
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if (i - argStartOffset === 1 && (message[i] === "T" || message[i] === "F")) {
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args.push(message[i] === "T");
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}
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else {
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var argument = message.substr(argStartOffset, i);
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if (Number.NaN(argument)) {
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if (argument.contains("/")) {
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args.push(argument.split("/"));
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}
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else {
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args.push(argument);
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}
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}
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else {
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args.push(Number.parseInt(argument));
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}
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}
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}
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}
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if (isEvent) {
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self.emit.apply(self, args);
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}
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else if (callbacks.hasOwnProperty(seqno)) {
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callbacks[seqno].apply(null, args);
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delete callbacks[seqno];
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}
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else {
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throw "Received reply to unknown function call";
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}
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}
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catch (ex) {
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self.emit("error", ex.message);
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}
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});
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}
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else {
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//TODO send a message to client ?
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socket.end();
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}
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});
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messageTransform.on("error", function (error) {
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self.emit("error", error);
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});
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messageTransform.on("end",function () {
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self.emit("disconnect");
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});
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messageTransform.on("close", function () {
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self.emit("disconnect");
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});
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//Send a command message.
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//Needs the name of the buffer, the buffer id and the parameters of the command
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this.sendCommand = function(name, buffer) {
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let seqno = currentSeqno;
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currentSeqno += 1;
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var data = buffer + ":" + name + ":" + seqno;
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for (var i = 2 ; i < arguments.length ; ++i) {
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data += " " + arguments[i];
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}
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data += "\n";
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socket.write(data);
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};
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//Call a function.
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//Needs the name of the function, the bufferid, the parametres of the command and the callback to retreive the reply
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this.callFunction = function(name, buffer) {
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let seqno = currentSeqno;
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currentSeqno += 1;
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var lastArg = arguments.length - 1;
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if (typeof(arguments[lastArg]) === "function") {
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callbacks.defineProperty(currentSeqno,arguments[lastArg]);
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lastArg -= 1;
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}
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var data = buffer + ":" + name + "/" + seqno;
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for (var i = 2 ; i < lastArg ; ++i) {
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data += " " + arguments[i];
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}
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data += "\n";
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socket.write(data);
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};
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socket.pipe(messageTransform);
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}
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NetbeansClient.prototype = EventEmitter;
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//Wrapper around the controler exposing functions and commands as methods
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//Takes an incomming connexion (socket:Socket), an authentication callback (authentication:function(string))
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//Returns a Controler (Controler)
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function Controler(socket, authentication) {
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"use strict";
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EventEmitter.call(this);
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var client = new NetbeansClient(socket, authentication);
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var buffId = 0;
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var buffers = new {};
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function getBuffer() {
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buffId += 1;
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var buffer = new Buffer(client, buffId);
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buffers.defineProperty(buffId, buffer);
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return buffer;
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}
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client.on("event", function (buffId, name, seqno) {
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var target = this;
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if (buffId > 0 && buffers.hasOwnProperty(buffId)) {
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target = buffers[buffId];
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}
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target.emit.apply(target, Array.prototype.slice(arguments, 1));
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});
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client.on("error", function (error) {
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console.errort("Error : "+error);
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});
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client.on("disconnected", function () {
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});
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/* GLOBAL COMMANDS */
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//Bring Vim to the front (GVim only)
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this.raise = function () {
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client.sendCommand("raise", 0);
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};
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//Set an exiting delay, allowing the controler to handle things
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this.setExitDelay = function (seconds) {
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client.sendCommand("setExitDelay", 0, seconds);
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};
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//Set key binding. Absolutely not documented feature...
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this.specialKeys = function (keys) {
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client.sendCommand("specialKeys", 0,Types.string(keys));
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};
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//Create a new buffer. Return the buffer created
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this.create = function() {
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var buffer = getBuffer();
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client.sendCommand("create", buffId);
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return buffer;
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};
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//Associate already opened buffer on Vim to a controler owned buffer
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//Return the newly created buffer
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this.putBufferNumber = function (pathname) {
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var buffer = getBuffer();
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client.sendCommand("putBufferNumber", buffId, Types.string(pathname)); //TODO : May be better on the buffer
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return buffer;
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};
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//Associate already opened buffer on Vim to a controler owned buffer and bring it to front
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//Return the newly created buffer
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this.setBufferNumber = function (pathname) {
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var buffer = getBuffer();
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client.sendCommand("setBufferNumber", buffId, Types.string(pathname));
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return buffer;
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};
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/* GLOBAL FUNCTIONS */
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//Ask Vim to save and exit
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this.saveAndExit = function (callback) {
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client.callFunction("saveAndExit", 0, callback);
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};
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//Get the numbr of modified buffers
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this.getModified = function (callback) {
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client.callFunction("getModified", 0, callback);
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};
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}
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Controler.prototype = EventEmitter;
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module.exports.events = events;
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module.exports.Controler = Controler;
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