/* 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 char[] 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];
bufferPointer = 0;
}
public void setTerminalProvider(TerminalProviderInterface tp) {
terminalProvider = tp;
}
public String getNextCommand() {
char x;
int val = 0;
cursorPosition = 0;
printPrompt(cpt);
String currentBuf = "";
sequence = null;
int seqNb = 0;
long timeSeq = 0;
try {
while (val != 3) {
val = (RawConsoleInput.read(true));
x = (char) val;
//TraceManager.addDev("val=" + val);
// Special sequence?
if (sequence == null) {
if (val == ESC) {
sequence = new char[256];
seqNb = 0;
timeSeq = System.currentTimeMillis();
}
} else {
//Time check
long now = System.currentTimeMillis();
if (now - timeSeq > 10) {
sequence = null;
} else {
sequence[seqNb] = x;
seqNb ++;
}
}
if (sequence != null) {
//TraceManager.addDev("Sequence=" + sequence + "length=" + sequence.length());
//printSequence(sequence);
}
if ((sequence != null) && (seqNb == 2)) {
//UP?
if ((sequence[0] == 91) && (sequence[1] == 65)) {
//TraceManager.addDev("UP");
//System.out.println("UP buffersize=" + buffer.size() + " bufferpointer=" + bufferPointer);
if (buffer.size() > 0) {
delCurrent(currentBuf);
bufferPointer = (bufferPointer > 0) ? bufferPointer - 1 : bufferPointer;
currentBuf = buffer.get(bufferPointer);
//printPrompt(cpt);
myPrint(currentBuf);
cursorPosition = currentBuf.length();
sequence = null;
val = -1;
} else {
sequence = null;
val = -1;
}
// DOWN
} else if ((sequence[0] == 91) && (sequence[1] == 66)) {
//System.out.println("DOWN buffersize=" + buffer.size());
if (buffer.size() > 0) {
//System.out.println("DOWN");
delCurrent(currentBuf);
bufferPointer = (bufferPointer == (buffer.size() - 1)) ? bufferPointer : bufferPointer + 1;
currentBuf = buffer.get(bufferPointer);
//printPrompt(cpt);
myPrint(currentBuf);
cursorPosition = currentBuf.length();
sequence = null;
val = -1;
} else {
sequence = null;
val = -1;
}
// BACKWARD
} else if ((sequence[0] == 91) && (sequence[1] == 68)) {
//System.out.println("BACKWARD");
backward();
sequence = null;
val = -1;
// FORWARD
} else if ((sequence[0] == 91) && (sequence[1] == 67)) {
forward(currentBuf);
sequence = null;
val = -1;
// DEL
//TraceManager.addDev("DEL");
}
}
if ((sequence != null) && (seqNb == 3)) {
// DEL
if ((sequence[0] == 91) && (sequence[1] == 51) &&
(sequence[2] == 126)) {
//TraceManager.addDev("DEL");
currentBuf = del(currentBuf);
//cursorPosition--;
sequence = null;
val = -1;
//
}
}
// 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)) {
//System.out.println("BACKSPACE/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 {
//System.out.println("Tricky cursor position");
int sep = currentBuf.length() - cursorPosition;
currentBuf = currentBuf.substring(0, cursorPosition) + x + currentBuf.substring(cursorPosition, currentBuf.length());
//TraceManager.addDev("buffer=" + currentBuf);
myPrint(currentBuf.substring(cursorPosition, currentBuf.length()));
// Must move cursor to previous psition + 1
for (int i = 0; i < sep; i++) {
backwardCode();
}
//TraceManager.addDev("buffer=" + currentBuf);
}
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
buffer.add(newBuf);
if (buffer.size() > maxbufferSize) {
buffer.removeElementAt(0);
}
bufferPointer = buffer.size();
//System.out.println("new BufferPointer=" + bufferPointer + " size buffer=" + buffer.size());
/*for(int j=0; j<buffer.size(); j++) {
System.out.println("Buffer at" + j + " = " + buffer.get(j));
}*/
}
private String del(String currentBuf) {
//TraceManager.addDev("DEL");
if (cursorPosition > 0) {
if (currentBuf.length() > 0) {
if (cursorPosition == currentBuf.length()) {
myPrint("\b \b");
currentBuf = currentBuf.substring(0, currentBuf.length() - 1);
cursorPosition--;
} else {
currentBuf = currentBuf.substring(0, cursorPosition - 1) + currentBuf.substring(cursorPosition, currentBuf.length());
backwardCode();
cursorPosition --;
myPrint(currentBuf.substring(cursorPosition, currentBuf.length()) + " ");
int sep = currentBuf.length() + 1 - cursorPosition;
for (int i = 0; i < sep; i++) {
backwardCode();
}
}
}
}
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;
}
backwardCode();
cursorPosition--;
}
private void backwardCode() {
System.out.print("\033[1D");
}
private void forward(String currentBuf) {
if (cursorPosition >= currentBuf.length()) {
return;
}
System.out.print("\033[1C");
cursorPosition++;
}
/*private void printSequence(String seq) {
}*/
}