package de.mpg.mpiwg.itgroup.digilib.plugin;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler;
import org.eclipse.core.commands.IHandlerListener;
import org.eclipse.core.resources.IFile;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.handlers.HandlerUtil;

import de.mpg.mpiwg.itgroup.digilib.plugin.editors.DigilibLinkEditorInput;
import de.mpg.mpiwg.itgroup.digilib.plugin.editors.DigilibLinkEditorPart;

/**
 * @author dwinter
 *
 * Open an DigilibLinkEditorPart on the selected files. Currently, the selected files have to be index meta files.
 * Where archive-path and texttols/image points to the image folder.
 * TODO chck the format and allow other formats.
 */
public class DigilibHandler implements IHandler {

	public void addHandlerListener(IHandlerListener handlerListener) {
		// TODO Auto-generated method stub

	}

	public void dispose() {
		// TODO Auto-generated method stub

	}

	public Object execute(ExecutionEvent event) throws ExecutionException {
		
		ISelection currentSelection = HandlerUtil.getCurrentSelection(event);
		if (IStructuredSelection.class.isInstance(currentSelection)) {
			IStructuredSelection selection = (IStructuredSelection) currentSelection;
			
			Object object = selection.getFirstElement();
			
			IFile file = (IFile) object;
			DigilibLinkEditorInput input = new DigilibLinkEditorInput(file,DigilibLinkEditorInput.INDEX_META);
			
		try {
			DigilibLinkEditorPart dp = (DigilibLinkEditorPart) HandlerUtil.getActiveWorkbenchWindow(event).getActivePage().openEditor(input,"de.mpg.mpiwg.itgroup.digilib.plugin.digilibLinkEditor");
			return dp;
		} catch (PartInitException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		}
		return null;
	}

	public boolean isEnabled() {
		
		return true;
	}

	public boolean isHandled() {
		// TODO Auto-generated method stub
		return true;
	}

	public void removeHandlerListener(IHandlerListener handlerListener) {
		// TODO Auto-generated method stub

	}

}