/* Copyright or (C) or Copr. GET / ENST, Telecom-Paris, Ludovic Apvrille
*
* ludovic.apvrille AT enst.fr
*
* This software is a computer program whose purpose is to allow the
* edition of TURTLE analysis, design and deployment diagrams, to
* allow the generation of RT-LOTOS or Java code from this diagram,
* and at last to allow the analysis of formal validation traces
* obtained from external tools, e.g. RTL from LAAS-CNRS and CADP
* from INRIA Rhone-Alpes.
*
* This software is governed by the CeCILL license under French law and
* abiding by the rules of distribution of free software. You can use,
* modify and/ or redistribute the software under the terms of the CeCILL
* license as circulated by CEA, CNRS and INRIA at the following URL
* "http://www.cecill.info".
*
* As a counterpart to the access to the source code and rights to copy,
* modify and redistribute granted by the license, users are provided only
* with a limited warranty and the software's author, the holder of the
* economic rights, and the successive licensors have only limited
* liability.
*
* In this respect, the user's attention is drawn to the risks associated
* with loading, using, modifying and/or developing or reproducing the
* software by the user in light of its specific status of free software,
* that may mean that it is complicated to manipulate, and that also
* therefore means that it is reserved for developers and experienced
* professionals having in-depth computer knowledge. Users are therefore
* encouraged to load and test the software's suitability as regards their
* requirements in conditions enabling the security of their systems and/or
* data to be ensured and, more generally, to use and operate it in the
* same conditions as regards security.
*
* The fact that you are presently reading this means that you have had
* knowledge of the CeCILL license and that you accept its terms.
*/
package myutil;
import java.util.Vector;
/**
* Class Terminal
* Creation: 21/03/2019
* Version 2.0 21/03/2019
* @author Ludovic APVRILLE
*/
public class Terminal {
private final static int MAX_BUFFER_SIZE = 5000;
private final static int CR = 10;
private final static int BACKSPACE = 8;
private final static int DEL = 127;
private final static int ESC = 27;
private final static int TAB = 9;
private Vector<String> buffer;
private int bufferPointer ;
private int cursorPosition;
private int promptLength = 0;
private int maxbufferSize = MAX_BUFFER_SIZE;
private TerminalProviderInterface terminalProvider;
private int cpt;
private String sequence;
private String os;
public Terminal() {
buffer = new Vector<>();
cpt = 0;
os = System.getProperty("os.name").toLowerCase();
System.out.println("Detected OS:" + os);
os = os.split(" ")[0];
}
public void setTerminalProvider(TerminalProviderInterface tp) {
terminalProvider = tp;
}
public String getNextCommand() {
char x;
int val = 0;
cursorPosition = 0;
printPrompt(cpt);
String currentBuf = "";
sequence = null;
long timeSeq = 0;
try {
while(val != 3) {
val = (RawConsoleInput.read(true));
x = (char) val;
// Special sequence?
if (sequence == null) {
if (val == ESC) {
sequence = "";
timeSeq = System.currentTimeMillis();
}
} else {
//Time check
long now = System.currentTimeMillis();
if (now - timeSeq > 10) {
sequence = null;
} else {
sequence += x;
}
}
/*if (sequence != null) {
TraceManager.addDev("Sequence=" + sequence);
printSequence(sequence);
}*/
if ((sequence != null) && (sequence.length() == 2)) {
//UP?
if ((sequence.charAt(0) == 91) && (sequence.charAt(1) == 65)) {
//System.out.println("UP");
delCurrent(currentBuf);
bufferPointer = (bufferPointer > 0)? bufferPointer-1:bufferPointer;
currentBuf = buffer.get(bufferPointer);
//printPrompt(cpt);
myPrint(currentBuf);
sequence = null;
val = -1;
// DOWN?
} else if ((sequence.charAt(0) == 91) && (sequence.charAt(1) == 66)) {
//System.out.println("DOWN");
delCurrent(currentBuf);
bufferPointer = (bufferPointer==(buffer.size()-1))?bufferPointer:bufferPointer+1;
currentBuf = buffer.get(bufferPointer);
//printPrompt(cpt);
myPrint(currentBuf);
sequence = null;
val = -1;
// BACKWARD
} else if ((sequence.charAt(0) == 91) && (sequence.charAt(1) == 68)) {
//System.out.println("DOWN");
backward();
sequence = null;
val = -1;
// FORWARD
} else if ((sequence.charAt(0) == 91) && (sequence.charAt(1) == 67)) {
//System.out.println("DOWN");
forward(currentBuf);
sequence = null;
val = -1;
// DEL
//TraceManager.addDev("DEL");
}
}
if ((sequence != null) && (sequence.length() == 3)) {
// DEL
if ((sequence.charAt(0) == 91) && (sequence.charAt(1) == 51) &&
(sequence.charAt(2) == 126)) {
currentBuf = del(currentBuf);
cursorPosition --;
sequence = null;
val = -1;
//TraceManager.addDev("DEL");
}
}
// Usual CHAR
if ((sequence == null) && (val != -1)) {
// CR
if (val == CR) {
cursorPosition = 0;
if (currentBuf.length() == 0) {
myPrint("\n");
printPrompt(cpt);
} else {
cpt++;
//if (!(os.startsWith("mac"))) {
myPrint("\n");
//}
addToBuffer(currentBuf);
return currentBuf;
}
}
//BACKSPACE
if ((val == BACKSPACE) || (val == DEL)) {
currentBuf = del(currentBuf);
//TAB
} else if (val == TAB) {
System.out.println("TAB");
if (terminalProvider != null) {
boolean b =terminalProvider.tabAction(currentBuf);
if (b) {
printPrompt(cpt);
}
}
// Regular character
} else if (val >= 32) {
//System.out.print("" + x + "(val=" + val + ");");
if (cursorPosition == currentBuf.length()) {
myPrint("" + x);
currentBuf += x;
} else {
currentBuf = currentBuf.substring(0,cursorPosition-1) + x + currentBuf.substring(cursorPosition, currentBuf.length());
myPrint("" + x + currentBuf.substring(cursorPosition, currentBuf.length()));
}
cursorPosition ++;
}
}
}
} catch (Exception e) {
TraceManager.addDev("Exception in terminal:" + e.getMessage());
return null;
}
return "";
}
private void addToBuffer (String newBuf) {
// Add at bufferPointer
// Therefore remove all elements after bufferPointer
for(int i=buffer.size()-1; i>=bufferPointer; i--) {
buffer.removeElementAt(i);
}
buffer.add(newBuf);
if (buffer.size() > maxbufferSize) {
buffer.removeElementAt(0);
}
bufferPointer = buffer.size();
}
private String del(String currentBuf) {
if (currentBuf.length() > 0) {
myPrint("\b \b");
currentBuf = currentBuf.substring(0, currentBuf.length() - 1);
}
return currentBuf;
}
public void myPrint(String s) {
//if (os.compareTo("mac") != 0) {
System.out.print(s);
//}
System.out.flush();
}
private String delCurrent(String currentBuf) {
if (buffer.size() > 0) {
int size = currentBuf.length();
for(int i=0; i<size; i++) {
currentBuf = del(currentBuf);
}
}
return currentBuf;
}
public void printPrompt(int cpt) {
String p = "" + cpt + "> ";
promptLength = p.length();
System.out.print(p);
}
private void backward() {
if (cursorPosition == 0) {
return;
}
System.out.print("\033[1D");
cursorPosition --;
}
private void forward(String currentBuf) {
if (cursorPosition == currentBuf.length()) {
return ;
}
System.out.print("\033[1C");
cursorPosition ++;
}
}