/*******************************************************************************
 * Copyright (c) 2013 Association for Decentralized Information Management
 * in Industry THTH ry.
 * 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:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.graphfile.hack;

import java.net.URI;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IStorage;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.PlatformObject;
import org.eclipse.core.runtime.content.IContentType;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.IPathEditorInput;
import org.eclipse.ui.IPersistableElement;
import org.eclipse.ui.IURIEditorInput;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.model.IWorkbenchAdapter;


/**
 * Editor input for files stored in the graph.
 * 
 * Note: this class is required, since FileEditorInput is not able to load/save GraphFile references.
 * Contents of this class are mostly copy-pasted from FileEditorInput.
 * 
 * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
 *
 */
public class GraphFileEditorInput  extends PlatformObject implements IFileEditorInput, IPathEditorInput, IURIEditorInput,
 IPersistableElement {
private GraphFile file;
	

	/**
	 * Creates an editor input based of the given file resource.
	 *
	 * @param file the file resource
	 */
	public GraphFileEditorInput(GraphFile file) {
		if (file == null)
			throw new IllegalArgumentException();
		this.file = file;
	
	}

	/* (non-Javadoc)
	 * Method declared on Object.
	 */
	public int hashCode() {
		return file.hashCode();
	}

	/* (non-Javadoc)
	 * Method declared on Object.
	 *
	 * The <code>FileEditorInput</code> implementation of this <code>Object</code>
	 * method bases the equality of two <code>FileEditorInput</code> objects on the
	 * equality of their underlying <code>IFile</code> resources.
	 */
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}
		if (!(obj instanceof IFileEditorInput)) {
			return false;
		}
		IFileEditorInput other = (IFileEditorInput) obj;
		return file.equals(other.getFile());
	}

	/* (non-Javadoc)
	 * Method declared on IEditorInput.
	 */
	public boolean exists() {
		return file.exists();
	}

	/* (non-Javadoc)
	 * Method declared on IPersistableElement.
	 */
	public String getFactoryId() {
		return GraphFileEditorInputFactory.getFactoryId();
	}

	/* (non-Javadoc)
	 * Method declared on IFileEditorInput.
	 */
	public IFile getFile() {
		return file;
	}

	/* (non-Javadoc)
	 * Method declared on IEditorInput.
	 */
	public ImageDescriptor getImageDescriptor() {
		IContentType contentType = IDE.getContentType(file);
		return PlatformUI.getWorkbench().getEditorRegistry()
				.getImageDescriptor(file.getName(), contentType);
	}

	/* (non-Javadoc)
	 * Method declared on IEditorInput.
	 */
	public String getName() {
		return file.getName();
	}

	/* (non-Javadoc)
	 * Method declared on IEditorInput.
	 */
	public IPersistableElement getPersistable() {
		return this;
	}

	/* (non-Javadoc)
	 * Method declared on IStorageEditorInput.
	 */
	public IStorage getStorage() {
		return file;
	}

	/* (non-Javadoc)
	 * Method declared on IEditorInput.
	 */
	public String getToolTipText() {
		return file.getFullPath().makeRelative().toString();
	}

	/* (non-Javadoc)
	 * Method declared on IPersistableElement.
	 */
	public void saveState(IMemento memento) {
		GraphFileEditorInputFactory.saveState(memento, this);
	}

	

	/* (non-Javadoc)
	 * @see org.eclipse.ui.IURIEditorInput#getURI()
	 */
	public URI getURI() {
		return file.getLocationURI();
	}
	
	
	/* (non-Javadoc)
	 * @see org.eclipse.ui.IPathEditorInput#getPath()
	 */
	public IPath getPath() {
		IPath location = file.getLocation();
		if (location != null)
			return location;

		throw new IllegalArgumentException();
	}


	/* (non-Javadoc)
	 * @see java.lang.Object#toString()
	 */
	public String toString() {
		return getClass().getName() + "(" + getFile().getFullPath() + ")"; //$NON-NLS-1$ //$NON-NLS-2$
	}
	
	/*
	 * Allows for the return of an {@link IWorkbenchAdapter} adapter.
	 * 
	 * @since 3.5
	 * 
	 * @see org.eclipse.core.runtime.PlatformObject#getAdapter(java.lang.Class)
	 */
	@SuppressWarnings("rawtypes")
	public Object getAdapter(Class adapter) {
		if (IWorkbenchAdapter.class.equals(adapter)) {
			return new IWorkbenchAdapter() {

				public Object[] getChildren(Object o) {
					return new Object[0];
				}

				public ImageDescriptor getImageDescriptor(Object object) {
					return GraphFileEditorInput.this.getImageDescriptor();
				}

				public String getLabel(Object o) {
					return GraphFileEditorInput.this.getName();
				}

				public Object getParent(Object o) {
					return GraphFileEditorInput.this.getFile().getParent();
				}
			};
		}

		return super.getAdapter(adapter);
	}
}