net.sf.sveditor.ui.explorer.IndentHandler.java Source code

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Here is the source code for net.sf.sveditor.ui.explorer.IndentHandler.java

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/****************************************************************************
 * Copyright (c) 2008-2014 Matthew Ballance and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Steven Dawson - initial implementation
 ****************************************************************************/

package net.sf.sveditor.ui.explorer;

import java.io.InputStream;

import net.sf.sveditor.core.SVCorePlugin;
import net.sf.sveditor.core.StringInputStream;
import net.sf.sveditor.core.indent.ISVIndenter;
import net.sf.sveditor.core.indent.SVIndentScanner;
import net.sf.sveditor.core.scanutils.StringTextScanner;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.handlers.HandlerUtil;

public class IndentHandler extends AbstractHandler implements IHandler {

    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException {
        ISelection sel = HandlerUtil.getCurrentSelection(event);

        if (sel instanceof IStructuredSelection) {
            IStructuredSelection sel_s = (IStructuredSelection) sel;

            IFile file = null;
            for (Object s : sel_s.toArray()) {

                if (s instanceof IFile) {
                    file = (IFile) s;
                } else if (s instanceof IAdaptable) {
                    file = (IFile) ((IAdaptable) s).getAdapter(IFile.class);
                }

                if (file == null) {
                    break;
                }
                try {
                    InputStream is = file.getContents();
                    StringBuilder sb = new StringBuilder();
                    int ch;
                    do {
                        ch = is.read();
                        if (ch != -1) {
                            sb.append((char) ch);
                        }
                    } while (ch != -1);
                    String contents = sb.toString();
                    SVIndentScanner scanner = new SVIndentScanner(new StringTextScanner(contents));
                    ISVIndenter indenter = SVCorePlugin.getDefault().createIndenter();
                    indenter.init(scanner);

                    String result = indenter.indent(-1, -1);
                    InputStream in_s = new StringInputStream(result);
                    file.setContents(in_s, true, false, new NullProgressMonitor());

                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }

        return null;
    }

}