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package jed;
import java.io.*;
import java.util.ArrayList;
import java.util.Scanner;
public class filebuffer {
private ArrayList<String> buffer;
private String fileName;
private boolean hasName;
private int currentLine = 0;
public filebuffer(String fn, boolean hn) {
buffer = new ArrayList<String>(); // Arraylist that stores every line of a file in strings
hasName = hn;
fileName = fn;
readFile();
}
/* getFileSize: gets the size of the buffer arraylist */
public int getFileSize() {
return buffer.size();
}
/* getCurrentLine: returns the current line value */
public int getCurrentLine() {
return currentLine;
}
/* changeCurrentLine: changes the current line value */
public void changeCurrentLine(int n) {
currentLine = n;
}
/* getLine: returns the selected line as a string */
public String getLine(int n) {
return buffer.get(n);
}
/* changeName: changes/adds the file name */
public void changeName(String name) {
fileName = name;
hasName = true;
}
/* printFile: prints strings from file arraylist, if num is true it includes line numbers */
public void printFile(boolean num) {
for (int i = 0; i < buffer.size(); i++) {
if (num)
System.out.printf("%d %s\n", i+1, buffer.get(i));
else
System.out.println(buffer.get(i));
}
}
/* createFile: creates a file, only to be called by writeFile */
private int createFile() {
try {
File f = new File(fileName);
if (f.createNewFile())
return 1;
return 0;
} catch (IOException e) {
return -1;
}
}
/* writeFile: reads strings from file arraylist and prints them into a file */
public int writeFile() {
if (!hasName) {
System.out.println("?");
return 1;
}
int err = createFile();
if (err == -1)
return 1;
try {
FileWriter fw = new FileWriter(fileName);
PrintWriter pw = new PrintWriter(fw);
for (int i = 0; i < buffer.size(); i++)
pw.println(buffer.get(i));
pw.close();
} catch (IOException e) {
return 1;
}
return 0;
}
/* readFile: opens a file and stores each line in a string arraylist called file */
public int readFile() {
try {
File fileObj = new File(fileName);
Scanner fileReader = new Scanner(fileObj);
while(fileReader.hasNextLine())
buffer.add(fileReader.nextLine());
fileReader.close();
} catch (FileNotFoundException e) {
createFile();
}
return 0;
}
/* range: gets the inputed range and runs the command with the range */
public void range(String range, String cmd) {
String num[] = new String[2];
num = range.replace("<", "").split(",");
String temp[] = new String[3];
temp = cmd.split("/");
int start = Integer.parseInt(num[0]) - 1, stop = Integer.parseInt(num[1]);
if (start <= 0 || start-1 > buffer.size() || stop <= 0 || stop-1 > buffer.size() || stop <= start)
System.out.println("?");
if (temp[0].equals("s"))
replace(start, stop, temp[1], temp[2]);
else if (temp[0].equals("d"))
deleteLine(start, stop);
}
/* deleteLine: deletes line in the range of start to stop */
public void deleteLine(int start, int stop) {
for (int i = start; i < stop; i++) {
jed.file.buffer.remove(start);
}
}
/* replace: replaces an expression with new user input */
public void replace(int start, int stop, String ex, String newEx) {
for (int i = start; i < stop; i++) {
String line = buffer.get(i);
buffer.add(i, line.replace(ex, newEx));
buffer.remove(i + 1);
}
}
/* find: finds user input in the file and prints it with line numbers */
public void find(String expression) {
for (int i = 0; i < buffer.size(); i++) {
String line = buffer.get(i);
for (int j = 0, k = expression.length(); k < line.length(); j++, k++) {
if (line.substring(j, k).equals(expression)) {
System.out.printf("%d %s\n", i + 1, line);
break;
}
}
}
}
/* changeLine: changes the current line */
public void changeLine(Scanner kbIn) {
buffer.remove(currentLine);
String input;
int line = currentLine;
while (!(input = kbIn.nextLine()).equals("."))
buffer.add(line++, input);
}
/* deleteLine: deletes the current line */
public void deleteLine() {
buffer.remove(currentLine);
}
/* append: appends user input to the end of a file */
public void append(Scanner kbIn) {
String input;
while (!(input = kbIn.nextLine()).equals("."))
buffer.add(input);
}
}
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