/*
* Copyright 2012 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Eclipse Public License version 1.0, available at
* http://www.eclipse.org/legal/epl-v10.html
*/
package org.jboss.aesh.extensions.more;
import org.jboss.aesh.complete.CompleteOperation;
import org.jboss.aesh.complete.Completion;
import org.jboss.aesh.console.Buffer;
import org.jboss.aesh.console.Config;
import org.jboss.aesh.console.Console;
import org.jboss.aesh.console.ConsoleCommand;
import org.jboss.aesh.console.operator.ControlOperator;
import org.jboss.aesh.edit.actions.Operation;
import org.jboss.aesh.extensions.page.Page;
import org.jboss.aesh.extensions.page.PageLoader;
import org.jboss.aesh.extensions.page.SimplePageLoader;
import org.jboss.aesh.util.ANSI;
import org.jboss.aesh.util.FileLister;
import org.jboss.aesh.util.Parser;
import java.io.File;
import java.io.IOException;
/**
* @author <a href="mailto:stale.pedersen@jboss.org">Ståle W. Pedersen</a>
*/
public class More extends ConsoleCommand implements Completion {
private int rows;
private int topVisibleRow;
private int prevTopVisibleRow;
private StringBuilder number;
private MorePage page;
private SimplePageLoader loader;
public More(Console console) {
super(console);
loader = new SimplePageLoader();
number = new StringBuilder();
}
public void setFile(File page) throws IOException {
loader.setFile(page);
}
public void setFile(String filename) throws IOException {
loader.setFile(new File(filename));
}
public void setInput(String input) throws IOException {
loader.readPageAsString(input);
}
@Override
protected void afterAttach() throws IOException {
rows = console.getTerminalSize().getHeight();
int columns = console.getTerminalSize().getWidth();
page = new MorePage(loader, columns);
if(ControlOperator.isRedirectionOut(getConsoleOutput().getControlOperator())) {
int count=0;
for(String line : this.page.getLines()) {
console.pushToStdOut(line);
count++;
if(count < this.page.size())
console.pushToStdOut(Config.getLineSeparator());
}
detach();
}
else {
if(!page.hasData()) {
//display help
}
else
display(Background.INVERSE);
}
}
@Override
protected void afterDetach() throws IOException {
clearNumber();
topVisibleRow = prevTopVisibleRow = 0;
if(!ControlOperator.isRedirectionOut(getConsoleOutput().getControlOperator())) {
console.pushToStdOut(Buffer.printAnsi("K"));
console.pushToStdOut(Buffer.printAnsi("1G"));
}
page.clear();
}
@Override
public void processOperation(Operation operation) throws IOException {
if(operation.getInput()[0] == 'q') {
detach();
}
else if( operation.equals(Operation.NEW_LINE)) {
topVisibleRow = topVisibleRow + getNumber();
if(topVisibleRow > (page.size()-rows)) {
topVisibleRow = page.size()-rows;
if(topVisibleRow < 0)
topVisibleRow = 0;
display(Background.INVERSE);
detach();
}
else
display(Background.INVERSE);
clearNumber();
}
// ctrl-f || space
else if(operation.getInput()[0] == 6 || operation.getInput()[0] == 32) {
topVisibleRow = topVisibleRow + rows*getNumber();
if(topVisibleRow > (page.size()-rows)) {
topVisibleRow = page.size()-rows;
if(topVisibleRow < 0)
topVisibleRow = 0;
display(Background.INVERSE);
detach();
}
else
display(Background.INVERSE);
clearNumber();
}
else if(operation.getInput()[0] == 2) { // ctrl-b
topVisibleRow = topVisibleRow - rows*getNumber();
if(topVisibleRow < 0)
topVisibleRow = 0;
display(Background.INVERSE);
clearNumber();
}
else if(Character.isDigit(operation.getInput()[0])) {
number.append(Character.getNumericValue(operation.getInput()[0]));
}
}
private void display(Background background) throws IOException {
//console.clear();
console.pushToStdOut(Buffer.printAnsi("0G"));
console.pushToStdOut(Buffer.printAnsi("2K"));
if(prevTopVisibleRow == 0 && topVisibleRow == 0) {
for(int i=topVisibleRow; i < (topVisibleRow+rows); i++) {
if(i < page.size()) {
console.pushToStdOut(page.getLine(i));
console.pushToStdOut(Config.getLineSeparator());
}
}
}
else if(prevTopVisibleRow < topVisibleRow) {
for(int i=prevTopVisibleRow; i < topVisibleRow; i++) {
console.pushToStdOut(page.getLine(i + rows));
console.pushToStdOut(Config.getLineSeparator());
}
prevTopVisibleRow = topVisibleRow;
}
else if(prevTopVisibleRow > topVisibleRow) {
for(int i=topVisibleRow; i < (topVisibleRow+rows); i++) {
if(i < page.size()) {
console.pushToStdOut(page.getLine(i));
console.pushToStdOut(Config.getLineSeparator());
}
}
prevTopVisibleRow = topVisibleRow;
}
displayBottom(background);
}
private void displayBottom(Background background) throws IOException {
if(background == Background.INVERSE) {
console.pushToStdOut(ANSI.getInvertedBackground());
console.pushToStdOut("--More--(");
console.pushToStdOut(getPercentDisplayed()+"%)");
console.pushToStdOut(ANSI.getNormalBackground());
//console.pushToStdOut(ANSI.getBold());
}
}
private String getPercentDisplayed() {
double row = topVisibleRow + rows;
if(row > this.page.size())
row = this.page.size();
return String.valueOf((int) ((row / this.page.size()) * 100));
}
@Override
public void complete(CompleteOperation completeOperation) {
if(completeOperation.getBuffer().equals("m"))
completeOperation.getCompletionCandidates().add("more");
else if(completeOperation.getBuffer().equals("mo"))
completeOperation.getCompletionCandidates().add("more");
else if(completeOperation.getBuffer().equals("mor"))
completeOperation.getCompletionCandidates().add("more");
else if(completeOperation.getBuffer().equals("more"))
completeOperation.getCompletionCandidates().add("more");
else if(completeOperation.getBuffer().startsWith("more ")) {
String word = Parser.findWordClosestToCursor(completeOperation.getBuffer(),
completeOperation.getCursor());
completeOperation.setOffset(completeOperation.getCursor());
//FileUtils.listMatchingDirectories(completeOperation, word,
// new File(System.getProperty("user.dir")));
new FileLister(word, new File(System.getProperty("user.dir"))).findMatchingDirectories(completeOperation);
}
}
public void displayHelp() throws IOException {
console.pushToStdOut(Config.getLineSeparator()
+"Usage: more [options] file..."
+Config.getLineSeparator());
}
private int getNumber() {
if(number.length() > 0)
return Integer.parseInt(number.toString());
else
return 1;
}
private void clearNumber() {
number = new StringBuilder();
}
private static enum Background {
NORMAL,
INVERSE
}
private class MorePage extends Page {
public MorePage(PageLoader loader, int columns) {
super(loader, columns);
}
}
}