/* * The Original Code is Mozilla Universal charset detector code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 2001 * the Initial Developer. All Rights Reserved. * * Contributor(s): * António Afonso (antonio.afonso gmail.com) - port to JavaScript * Mark Pilgrim - port to Python * Shy Shalom - original C code * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA */ var CharSetProber = require('./charsetprober'); var CodingStateMachine = require('./codingstatemachine'); var escsm = require('./escsm'); var constants = require('./constants'); function EscCharSetProber() { CharSetProber.apply(this); var self = this; function init() { self._mCodingSM = [ new CodingStateMachine(escsm.HZSMModel), new CodingStateMachine(escsm.ISO2022CNSMModel), new CodingStateMachine(escsm.ISO2022JPSMModel), new CodingStateMachine(escsm.ISO2022KRSMModel) ]; self.reset(); } this.reset = function() { EscCharSetProber.prototype.reset.apply(this); for( var i = 0, codingSM; codingSM = this._mCodingSM[i]; i++ ) { if( !codingSM ) continue; codingSM.active = true; codingSM.reset(); } this._mActiveSM = self._mCodingSM.length; this._mDetectedCharset = null; } this.getCharsetName = function() { return this._mDetectedCharset; } this.getConfidence = function() { if( this._mDetectedCharset ) { return 0.99; } else { return 0.00; } } this.feed = function(aBuf) { for( var i = 0, c; i < aBuf.length; i++ ) { c = aBuf[i]; for( var j = 0, codingSM; codingSM = this._mCodingSM[j]; j++ ) { if( !codingSM || !codingSM.active ) continue; var codingState = codingSM.nextState(c); if( codingState == constants.error ) { codingSM.active = false; this._mActiveSM--; if( this._mActiveSM <= 0 ) { this._mState = constants.notMe; return this.getState(); } } else if( codingState == constants.itsMe ) { this._mState = constants.foundIt; this._mDetectedCharset = codingSM.getCodingStateMachine(); return this.getState(); } } } return this.getState(); } init(); } EscCharSetProber.prototype = new CharSetProber(); module.exports = EscCharSetProber