001 /* 002 * Copyright (C) 2012 eXo Platform SAS. 003 * 004 * This is free software; you can redistribute it and/or modify it 005 * under the terms of the GNU Lesser General Public License as 006 * published by the Free Software Foundation; either version 2.1 of 007 * the License, or (at your option) any later version. 008 * 009 * This software is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * You should have received a copy of the GNU Lesser General Public 015 * License along with this software; if not, write to the Free 016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org. 018 */ 019 020 package org.crsh.console; 021 022 import java.io.IOException; 023 024 /** 025 * Wraps {@link org.crsh.telnet.term.spi.TermIO} and care about CRLF. 026 */ 027 class EditorWriter { 028 029 /** . */ 030 private boolean previousCR; 031 032 /** . */ 033 private final ConsoleDriver io; 034 035 protected EditorWriter(ConsoleDriver io) { 036 this.io = io; 037 } 038 039 /** 040 * Write a char sequence to the output. 041 * 042 * @param s the char sequence 043 * @throws java.io.IOException any io exception 044 */ 045 void write(CharSequence s) throws IOException { 046 int len = s.length(); 047 if (len > 0) { 048 for (int i = 0;i < len;i++) { 049 char c = s.charAt(i); 050 writeNoFlush(c); 051 } 052 } 053 } 054 055 /** 056 * Write a single char to the output. 057 * 058 * @param c the char to write 059 * @throws java.io.IOException any io exception 060 */ 061 void write(char c) throws IOException { 062 writeNoFlush(c); 063 } 064 065 private void writeNoFlush(char c) throws IOException { 066 if (previousCR && c == '\n') { 067 previousCR = false; 068 } else if (c == '\r' || c == '\n') { 069 previousCR = c == '\r'; 070 io.writeCRLF(); 071 } else { 072 io.write(c); 073 } 074 } 075 }