/*
* 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.forge.addon.shell.commands;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.inject.Inject;
import org.jboss.aesh.complete.CompleteOperation;
import org.jboss.aesh.complete.Completion;
import org.jboss.aesh.console.Config;
import org.jboss.aesh.console.Console;
import org.jboss.aesh.extensions.manual.Man;
import org.jboss.aesh.util.Parser;
import org.jboss.forge.addon.shell.ShellContext;
import org.jboss.forge.addon.ui.UICommand;
import org.jboss.forge.addon.ui.context.UIBuilder;
import org.jboss.forge.addon.ui.context.UIContext;
import org.jboss.forge.addon.ui.context.UIValidationContext;
import org.jboss.forge.addon.ui.input.InputComponent;
import org.jboss.forge.addon.ui.input.UICompleter;
import org.jboss.forge.addon.ui.input.UIInputMany;
import org.jboss.forge.addon.ui.metadata.UICommandMetadata;
import org.jboss.forge.addon.ui.result.Result;
import org.jboss.forge.addon.ui.result.Results;
import org.jboss.forge.addon.ui.util.Metadata;
import org.jboss.forge.furnace.addons.AddonRegistry;
/**
* @author <a href="mailto:stale.pedersen@jboss.org">Ståle W. Pedersen</a>
*/
public class ManCommand implements UICommand, Completion
{
private AddonRegistry registry;
@Inject
private UIInputMany<String> arguments;
@Inject
public ManCommand(AddonRegistry registry)
{
this.registry = registry;
}
@Override
public UICommandMetadata getMetadata()
{
return Metadata.forCommand(getClass()).name("man")
.description("man - an interface to the online reference manuals");
}
@Override
public boolean isEnabled(UIContext context)
{
return (context instanceof ShellContext);
}
@Override
public void initializeUI(UIBuilder builder) throws Exception
{
arguments.setDefaultValue(Arrays.asList(getMetadata().getName()));
arguments.setLabel("");
arguments.setRequired(false);
arguments.setCompleter(new UICompleter<String>()
{
@Override
public Iterable<String> getCompletionProposals(UIContext context, InputComponent<?, String> input, String value)
{
List<String> manCommands = new ArrayList<String>();
// list all commands
if (value == null || value.trim().length() < 1)
{
for (UICommand instance : registry.getServices(UICommand.class))
{
manCommands.add(instance.getMetadata().getName());
}
}
// find the last
else
{
String item = Parser.findEscapedSpaceWordCloseToEnd(value.trim());
// completeOperation.setOffset(completeOperation.getCursor() -
// item.length());
for (UICommand instance : registry.getServices(UICommand.class))
{
if (instance.getMetadata().getName().startsWith(item))
manCommands.add(instance.getMetadata().getName());
}
}
return manCommands;
}
});
builder.add(arguments);
}
@Override
public void validate(UIValidationContext validator)
{
}
@Override
public Result execute(UIContext context) throws Exception
{
if (context instanceof ShellContext)
{
Console console = ((ShellContext) context).getShell().getConsole();
try
{
Man man = new Man(console);
// for now we only try to display the first
String commandName = arguments.getValue().iterator().next();
URL docUrl = getCommand(commandName);
if (docUrl != null)
{
man.setFile(docUrl.openStream(), docUrl.getPath());
man.attach(((ShellContext) context).getConsoleOutput());
}
else
console.pushToStdOut("No manual page found for: " + commandName + Config.getLineSeparator());
}
catch (Exception ioe)
{
return Results.fail(ioe.getMessage());
}
}
return null;
}
@Override
public void complete(CompleteOperation completeOperation)
{
try
{
// list all commands
if (completeOperation.getBuffer().trim().equals("man"))
{
for (UICommand instance : registry.getServices(UICommand.class))
{
completeOperation.addCompletionCandidate(instance.getMetadata().getName());
}
}
// find the last
else
{
String item = Parser.findEscapedSpaceWordCloseToEnd(completeOperation.getBuffer().trim());
completeOperation.setOffset(completeOperation.getCursor() -
item.length());
for (UICommand instance : registry.getServices(UICommand.class))
{
if (instance.getMetadata().getName().startsWith(item))
completeOperation.addCompletionCandidate(instance.getMetadata().getName());
}
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
private URL getCommand(String name)
{
for (UICommand instance : registry.getServices(UICommand.class))
{
if (instance.getMetadata().getName().equals(name))
return instance.getMetadata().getDocLocation();
}
return null;
}
}