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.term.console; 021 022 import org.crsh.term.spi.TermIO; 023 import org.crsh.text.Style; 024 025 import java.io.IOException; 026 027 /** 028 * Wraps {@link TermIO} and care about CRLF. 029 */ 030 class TermIOWriter { 031 032 /** . */ 033 private boolean previousCR; 034 035 /** . */ 036 private final TermIO io; 037 038 protected TermIOWriter(TermIO io) { 039 this.io = io; 040 } 041 042 /** 043 * Write a char sequence to the output. 044 * 045 * @param s the char sequence 046 * @throws IOException any io exception 047 */ 048 void write(CharSequence s) throws IOException { 049 int len = s.length(); 050 if (len > 0) { 051 for (int i = 0;i < len;i++) { 052 char c = s.charAt(i); 053 writeNoFlush(c); 054 } 055 } 056 } 057 058 /** 059 * Write a single char to the output. 060 * 061 * @param c the char to write 062 * @throws IOException any io exception 063 */ 064 void write(char c) throws IOException { 065 writeNoFlush(c); 066 } 067 068 private void writeNoFlush(char c) throws IOException { 069 if (previousCR && c == '\n') { 070 previousCR = false; 071 } else if (c == '\r' || c == '\n') { 072 previousCR = c == '\r'; 073 io.writeCRLF(); 074 } else { 075 io.write(c); 076 } 077 } 078 }