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com.orientechnologies.common.console.TTYConsoleReader Maven / Gradle / Ivy
/*
*
* * Copyright 2014 Orient Technologies LTD (info(at)orientechnologies.com)
* *
* * Licensed under the Apache License, Version 2.0 (the "License");
* * you may not use this file except in compliance with the License.
* * You may obtain a copy of the License at
* *
* * http://www.apache.org/licenses/LICENSE-2.0
* *
* * Unless required by applicable law or agreed to in writing, software
* * distributed under the License is distributed on an "AS IS" BASIS,
* * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* * See the License for the specific language governing permissions and
* * limitations under the License.
* *
* * For more information: http://www.orientechnologies.com
*
*/
package com.orientechnologies.common.console;
import com.orientechnologies.common.exception.OException;
import com.orientechnologies.common.log.OLogManager;
import java.io.*;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
public class TTYConsoleReader implements OConsoleReader {
private static final String HISTORY_FILE_NAME = ".orientdb_history";
public static int END_CHAR = 70;
public static int BEGIN_CHAR = 72;
public static int DEL_CHAR = 126;
public static int DOWN_CHAR = 66;
public static int UP_CHAR = 65;
public static int RIGHT_CHAR = 67;
public static int LEFT_CHAR = 68;
public static int HORIZONTAL_TAB_CHAR = 9;
public static int VERTICAL_TAB_CHAR = 11;
public static int BACKSPACE_CHAR = 127;
public static int NEW_LINE_CHAR = 10;
public static int UNIT_SEPARATOR_CHAR = 31;
private static int MAX_HISTORY_ENTRIES = 50;
protected int currentPos = 0;
protected List history = new ArrayList();
protected String historyBuffer;
protected Reader inStream;
protected PrintStream outStream;
protected OConsoleApplication console;
public TTYConsoleReader() {
File file = getHistoryFile(true);
BufferedReader reader;
try {
reader = new BufferedReader(new FileReader(file));
String historyEntry = reader.readLine();
while (historyEntry != null) {
history.add(historyEntry);
historyEntry = reader.readLine();
}
if (System.getProperty("file.encoding") != null) {
inStream = new InputStreamReader(System.in, System.getProperty("file.encoding"));
outStream = new PrintStream(System.out, false, System.getProperty("file.encoding"));
} else {
inStream = new InputStreamReader(System.in);
outStream = System.out;
}
} catch (FileNotFoundException fnfe) {
OLogManager.instance().error(this, "History file not found", fnfe, "");
} catch (IOException ioe) {
OLogManager.instance().error(this, "Error reading history file.", ioe, "");
}
if (inStream == null)
throw new OException("Cannot access to the input stream. Check permissions of running process");
}
public String readLine() throws IOException {
String consoleInput = "";
StringBuffer buffer = new StringBuffer();
currentPos = 0;
historyBuffer = null;
int historyNum = history.size();
boolean hintedHistory = false;
while (true) {
boolean escape = false;
boolean ctrl = false;
int next = inStream.read();
if (next == 27) {
escape = true;
inStream.read();
next = inStream.read();
}
if (escape) {
if (next == 49) {
inStream.read();
next = inStream.read();
}
if (next == 53) {
ctrl = true;
next = inStream.read();
}
if (ctrl) {
if (next == RIGHT_CHAR) {
currentPos = buffer.indexOf(" ", currentPos) + 1;
if (currentPos == 0)
currentPos = buffer.length();
StringBuffer cleaner = new StringBuffer();
for (int i = 0; i < buffer.length(); i++) {
cleaner.append(" ");
}
rewriteConsole(cleaner, true);
rewriteConsole(buffer, false);
} else if (next == LEFT_CHAR) {
if (currentPos > 1 && currentPos < buffer.length() && buffer.charAt(currentPos - 1) == ' ') {
currentPos = buffer.lastIndexOf(" ", (currentPos - 2)) + 1;
} else {
currentPos = buffer.lastIndexOf(" ", currentPos) + 1;
}
if (currentPos < 0)
currentPos = 0;
StringBuffer cleaner = new StringBuffer();
for (int i = 0; i < buffer.length(); i++) {
cleaner.append(" ");
}
rewriteConsole(cleaner, true);
rewriteConsole(buffer, false);
} else {
}
} else {
if (next == UP_CHAR && !history.isEmpty()) {
if (history.size() > 0) { // UP
StringBuffer cleaner = new StringBuffer();
for (int i = 0; i < buffer.length(); i++) {
cleaner.append(" ");
}
rewriteConsole(cleaner, true);
if (!hintedHistory && (historyNum == history.size() || !buffer.toString().equals(history.get(historyNum)))) {
if (buffer.length() > 0) {
hintedHistory = true;
historyBuffer = buffer.toString();
} else {
historyBuffer = null;
}
}
historyNum = getHintedHistoryIndexUp(historyNum);
if (historyNum > -1) {
buffer = new StringBuffer(history.get(historyNum));
} else {
buffer = new StringBuffer(historyBuffer);
}
currentPos = buffer.length();
rewriteConsole(buffer, false);
// writeHistory(historyNum);
}
} else if (next == DOWN_CHAR && !history.isEmpty()) { // DOWN
if (history.size() > 0) {
StringBuffer cleaner = new StringBuffer();
for (int i = 0; i < buffer.length(); i++) {
cleaner.append(" ");
}
rewriteConsole(cleaner, true);
historyNum = getHintedHistoryIndexDown(historyNum);
if (historyNum == history.size()) {
if (historyBuffer != null) {
buffer = new StringBuffer(historyBuffer);
} else {
buffer = new StringBuffer("");
}
} else {
buffer = new StringBuffer(history.get(historyNum));
}
currentPos = buffer.length();
rewriteConsole(buffer, false);
// writeHistory(historyNum);
}
} else if (next == RIGHT_CHAR) {
if (currentPos < buffer.length()) {
currentPos++;
StringBuffer cleaner = new StringBuffer();
for (int i = 0; i < buffer.length(); i++) {
cleaner.append(" ");
}
rewriteConsole(cleaner, true);
rewriteConsole(buffer, false);
}
} else if (next == LEFT_CHAR) {
if (currentPos > 0) {
currentPos--;
StringBuffer cleaner = new StringBuffer();
for (int i = 0; i < buffer.length(); i++) {
cleaner.append(" ");
}
rewriteConsole(cleaner, true);
rewriteConsole(buffer, false);
}
} else if (next == END_CHAR) {
currentPos = buffer.length();
StringBuffer cleaner = new StringBuffer();
for (int i = 0; i < buffer.length(); i++) {
cleaner.append(" ");
}
rewriteConsole(cleaner, true);
rewriteConsole(buffer, false);
} else if (next == BEGIN_CHAR) {
currentPos = 0;
StringBuffer cleaner = new StringBuffer();
for (int i = 0; i < buffer.length(); i++) {
cleaner.append(" ");
}
rewriteConsole(cleaner, true);
rewriteConsole(buffer, false);
} else {
}
}
} else {
if (next == NEW_LINE_CHAR) {
outStream.println();
break;
} else if (next == BACKSPACE_CHAR) {
if (buffer.length() > 0 && currentPos > 0) {
StringBuffer cleaner = new StringBuffer();
for (int i = 0; i < buffer.length(); i++) {
cleaner.append(" ");
}
buffer.deleteCharAt(currentPos - 1);
currentPos--;
rewriteConsole(cleaner, true);
rewriteConsole(buffer, false);
}
} else if (next == DEL_CHAR) {
if (buffer.length() > 0 && currentPos >= 0 && currentPos < buffer.length()) {
StringBuffer cleaner = new StringBuffer();
for (int i = 0; i < buffer.length(); i++) {
cleaner.append(" ");
}
buffer.deleteCharAt(currentPos);
rewriteConsole(cleaner, true);
rewriteConsole(buffer, false);
}
} else if (next == HORIZONTAL_TAB_CHAR) {
StringBuffer cleaner = new StringBuffer();
for (int i = 0; i < buffer.length(); i++) {
cleaner.append(" ");
}
buffer = writeHint(buffer);
rewriteConsole(cleaner, true);
rewriteConsole(buffer, false);
currentPos = buffer.length();
} else {
if ((next > UNIT_SEPARATOR_CHAR && next < BACKSPACE_CHAR) || next > BACKSPACE_CHAR) {
StringBuffer cleaner = new StringBuffer();
for (int i = 0; i < buffer.length(); i++) {
cleaner.append(" ");
}
if (currentPos == buffer.length()) {
buffer.append((char) next);
} else {
buffer.insert(currentPos, (char) next);
}
currentPos++;
rewriteConsole(cleaner, true);
rewriteConsole(buffer, false);
} else {
outStream.println();
outStream.print(buffer);
}
}
historyNum = history.size();
hintedHistory = false;
}
}
consoleInput = buffer.toString();
history.remove(consoleInput);
history.add(consoleInput);
historyNum = history.size();
writeHistory(historyNum);
if (consoleInput.equals("clear")) {
outStream.flush();
for (int i = 0; i < 150; i++) {
outStream.println();
}
outStream.print("\r");
outStream.print(console.getPrompt());
return readLine();
} else {
return consoleInput;
}
}
public OConsoleApplication getConsole() {
return console;
}
public void setConsole(OConsoleApplication iConsole) {
console = iConsole;
}
private void writeHistory(int historyNum) throws IOException {
if (historyNum <= MAX_HISTORY_ENTRIES) {
File historyFile = getHistoryFile(false);
BufferedWriter writer = new BufferedWriter(new FileWriter(historyFile));
try {
for (String historyEntry : history) {
writer.write(historyEntry);
writer.newLine();
}
} finally {
writer.flush();
writer.close();
}
} else {
File historyFile = getHistoryFile(false);
BufferedWriter writer = new BufferedWriter(new FileWriter(historyFile));
try {
for (String historyEntry : history.subList(historyNum - MAX_HISTORY_ENTRIES - 1, historyNum - 1)) {
writer.write(historyEntry);
writer.newLine();
}
} finally {
writer.flush();
writer.close();
}
}
}
private StringBuffer writeHint(StringBuffer buffer) {
List suggestions = new ArrayList();
for (Method method : console.getConsoleMethods().keySet()) {
String command = OConsoleApplication.getClearName(method.getName());
if (command.startsWith(buffer.toString())) {
suggestions.add(command);
}
}
if (suggestions.size() > 1) {
StringBuffer hintBuffer = new StringBuffer();
String[] bufferComponents = buffer.toString().split(" ");
String[] suggestionComponents;
Set bufferPart = new HashSet();
String suggestionPart = null;
boolean appendSpace = true;
for (String suggestion : suggestions) {
suggestionComponents = suggestion.split(" ");
hintBuffer.append("* " + suggestion + " ");
hintBuffer.append("\n");
suggestionPart = "";
if (bufferComponents.length == 0 || buffer.length() == 0) {
suggestionPart = null;
} else if (bufferComponents.length == 1) {
bufferPart.add(suggestionComponents[0]);
if (bufferPart.size() > 1) {
suggestionPart = bufferComponents[0];
appendSpace = false;
} else {
suggestionPart = suggestionComponents[0];
}
} else {
bufferPart.add(suggestionComponents[bufferComponents.length - 1]);
if (bufferPart.size() > 1) {
for (int i = 0; i < bufferComponents.length; i++) {
suggestionPart += bufferComponents[i];
if (i < (bufferComponents.length - 1)) {
suggestionPart += " ";
}
appendSpace = false;
}
} else {
for (int i = 0; i < suggestionComponents.length; i++) {
suggestionPart += suggestionComponents[i] + " ";
}
}
}
}
if (suggestionPart != null) {
buffer = new StringBuffer();
buffer.append(suggestionPart);
if (appendSpace) {
buffer.append(" ");
}
}
hintBuffer.append("-----------------------------\n");
rewriteHintConsole(hintBuffer);
} else if (suggestions.size() > 0) {
buffer = new StringBuffer();
buffer.append(suggestions.get(0));
buffer.append(" ");
}
return buffer;
}
private void rewriteConsole(StringBuffer buffer, boolean cleaner) {
outStream.print("\r");
outStream.print(console.getPrompt());
if (currentPos < buffer.length() && buffer.length() > 0 && !cleaner) {
outStream.print("\033[0m" + buffer.substring(0, currentPos) + "\033[0;30;47m" + buffer.substring(currentPos, currentPos + 1)
+ "\033[0m" + buffer.substring(currentPos + 1) + "\033[0m");
} else {
outStream.print(buffer);
}
}
private void rewriteHintConsole(StringBuffer buffer) {
outStream.print("\r");
outStream.print(buffer);
}
private int getHintedHistoryIndexUp(int historyNum) {
if (historyBuffer != null && !historyBuffer.equals("")) {
for (int i = (historyNum - 1); i >= 0; i--) {
if (history.get(i).startsWith(historyBuffer)) {
return i;
}
}
return -1;
}
return historyNum > 0 ? (historyNum - 1) : 0;
}
private int getHintedHistoryIndexDown(int historyNum) throws IOException {
if (historyBuffer != null && !historyBuffer.equals("")) {
for (int i = historyNum + 1; i < history.size(); i++) {
if (history.get(i).startsWith(historyBuffer)) {
return i;
}
}
return history.size();
}
return historyNum < history.size() ? (historyNum + 1) : history.size();
}
private File getHistoryFile(boolean read) {
File file = new File(HISTORY_FILE_NAME);
if (!file.exists()) {
try {
file.createNewFile();
} catch (IOException ioe) {
OLogManager.instance().error(this, "Error creating history file.", ioe, "");
}
} else if (!read) {
file.delete();
try {
file.createNewFile();
} catch (IOException ioe) {
OLogManager.instance().error(this, "Error creating history file.", ioe, "");
}
}
return file;
}
}
