EditorUtils.java

/*******************************************************************************
 * Copyright (c) 2006-2013, Cloudsmith Inc.
 * The code, documentation and other materials contained herein have been
 * licensed under the Eclipse Public License - v 1.0 by the copyright holder
 * listed above, as the Initial Contributor under such license. The text of
 * such license is available at www.eclipse.org.
 ******************************************************************************/

package org.eclipse.buckminster.ui.editor;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URI;
import java.net.URL;
import java.util.Comparator;

import org.eclipse.buckminster.download.DownloadManager;
import org.eclipse.buckminster.runtime.IOUtils;
import org.eclipse.buckminster.ui.UiUtils;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.ui.IURIEditorInput;

/**
 * @author Karel Brezina
 * 
 */
public class EditorUtils {
	static class PathComparator implements Comparator<IPath> {
		@Override
		public int compare(IPath o1, IPath o2) {
			return o1.toOSString().compareTo(o2.toOSString());
		}
	}

	private static Comparator<IPath> pathComparator = new PathComparator();

	public static Label createHeaderLabel(Composite parent, String headerText, int horizontalSpan) {
		Label label = UiUtils.createGridLabel(parent, headerText, horizontalSpan, 0, SWT.NONE);
		label.setForeground(parent.getDisplay().getSystemColor(SWT.COLOR_BLUE));

		return label;
	}

	public static ExternalFileEditorInput getExternalFileEditorInput(IURIEditorInput input, ArtifactType artifactType) throws CoreException,
			IOException {
		URI uri = input.getURI();
		URL url = uri.toURL();
		String protocol = url.getProtocol();

		File cspecFile = null;

		if (protocol == null || "file".equals(protocol)) //$NON-NLS-1$
		{
			cspecFile = new File(uri);
		}

		if (cspecFile == null || !cspecFile.canWrite()) {
			cspecFile = File.createTempFile(artifactType.getTempPrefix(), artifactType.getTempExtension());
			cspecFile.deleteOnExit();
			OutputStream os = null;
			try {
				os = new FileOutputStream(cspecFile);
				DownloadManager.readInto(url, null, os, null);
			} finally {
				IOUtils.close(os);
			}
		}

		return new DerivedExternalFileEditorInput(input, cspecFile, new Path(uri.getPath()).lastSegment(), url.toString());
	}

	public static Composite getNamedTabComposite(Composite parent, String header) {
		ScrolledComposite scrolledComposite = new ScrolledComposite(parent, SWT.H_SCROLL | SWT.V_SCROLL);
		scrolledComposite.setExpandHorizontal(true);
		scrolledComposite.setExpandVertical(true);

		Composite tabComposite = new Composite(scrolledComposite, SWT.NONE);
		scrolledComposite.setContent(tabComposite);

		tabComposite.setLayout(new GridLayout(1, true));
		tabComposite.setBackground(parent.getDisplay().getSystemColor(SWT.COLOR_WHITE));
		tabComposite.setBackgroundMode(SWT.INHERIT_FORCE);

		Label headerLabel = new Label(tabComposite, SWT.BOLD);
		headerLabel.setText(header);
		headerLabel.setForeground(parent.getDisplay().getSystemColor(SWT.COLOR_BLUE));
		FontData fontData = new FontData();
		fontData.setHeight(14);
		headerLabel.setFont(new Font(tabComposite.getDisplay(), fontData));
		GridData gridData = new GridData(SWT.FILL, SWT.FILL, false, false);
		gridData.heightHint = 30;
		headerLabel.setLayoutData(gridData);

		return tabComposite;
	}

	public static Control getOptimizedControl(Composite composite) {
		if (composite.getParent() instanceof ScrolledComposite) {
			ScrolledComposite container = (ScrolledComposite) composite.getParent();
			container.setMinSize(composite.computeSize(SWT.DEFAULT, SWT.DEFAULT, true));
			return container;
		}

		return composite;
	}

	public static Comparator<IPath> getPathComparator() {
		return pathComparator;
	}

	private EditorUtils() {
	}
}