/**

 * Copyright (c) 2009 Symbian Foundation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Symbian Foundation - initial contribution.

 * Contributors:

 * Description:

 * Overview:

 * Details:

 * Platforms/Drives/Compatibility:

 * Assumptions/Requirement/Pre-requisites:

 * Failures and causes:

 */

package org.symbian.tools.wrttools.jseditors.wizards;

import org.eclipse.core.resources.IContainer;

import org.eclipse.core.resources.IResource;

import org.eclipse.core.resources.ResourcesPlugin;

import org.eclipse.core.runtime.Path;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.wizard.WizardPage;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.ModifyEvent;

import org.eclipse.swt.events.ModifyListener;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Text;

import org.eclipse.ui.dialogs.ContainerSelectionDialog;

/**

 * The "New" wizard page allows setting the container for the new file as well

 * as the file name. The page will only accept file name without the extension

 * OR with the extension that matches the expected one (html).

 */

public class NewHTMLWizardPage extends WizardPage {

	private Text containerText;

	private Text fileText;

	private ISelection selection;

	/**

	 * Constructor for SampleNewWizardPage.

	 * 

	 * @param pageName

	 */

	public NewHTMLWizardPage(ISelection selection) {

		super("wizardPage");

		setTitle("HTML File");

		setDescription("This wizard creates a new HTML file with *.html extension that can be opened by an HTML editor.");

		this.selection = selection;

	}

	/**

	 * @see IDialogPage#createControl(Composite)

	 */

	public void createControl(Composite parent) {

		Composite container = new Composite(parent, SWT.NULL);

		GridLayout layout = new GridLayout();

		container.setLayout(layout);

		layout.numColumns = 3;

		layout.verticalSpacing = 9;

		Label label = new Label(container, SWT.NULL);

		label.setText("&Container:");

		containerText = new Text(container, SWT.BORDER | SWT.SINGLE);

		GridData gd = new GridData(GridData.FILL_HORIZONTAL);

		containerText.setLayoutData(gd);

		containerText.addModifyListener(new ModifyListener() {

			public void modifyText(ModifyEvent e) {

				dialogChanged();

			}

		});

		Button button = new Button(container, SWT.PUSH);

		button.setText("Browse...");

		button.addSelectionListener(new SelectionAdapter() {

			public void widgetSelected(SelectionEvent e) {

				handleBrowse();

			}

		});

		label = new Label(container, SWT.NULL);

		label.setText("&File name:");

		fileText = new Text(container, SWT.BORDER | SWT.SINGLE);

		gd = new GridData(GridData.FILL_HORIZONTAL);

		fileText.setLayoutData(gd);

		fileText.addModifyListener(new ModifyListener() {

			public void modifyText(ModifyEvent e) {

				dialogChanged();

			}

		});

		initialize();

		dialogChanged();

		setControl(container);

	}

	/**

	 * Tests if the current workbench selection is a suitable container to use.

	 */

	private void initialize() {

		if (selection != null && selection.isEmpty() == false

				&& selection instanceof IStructuredSelection) {

			IStructuredSelection ssel = (IStructuredSelection) selection;

			if (ssel.size() > 1)

				return;

			Object obj = ssel.getFirstElement();

			if (obj instanceof IResource) {

				IContainer container;

				if (obj instanceof IContainer)

					container = (IContainer) obj;

				else

					container = ((IResource) obj).getParent();

				containerText.setText(container.getFullPath().toString());

			}

		}

		fileText.setText("index.html");

	}

	/**

	 * Uses the standard container selection dialog to choose the new value for

	 * the container field.

	 */

	private void handleBrowse() {

		ContainerSelectionDialog dialog = new ContainerSelectionDialog(

				getShell(), ResourcesPlugin.getWorkspace().getRoot(), false,

				"Select new file container");

		if (dialog.open() == ContainerSelectionDialog.OK) {

			Object[] result = dialog.getResult();

			if (result.length == 1) {

				containerText.setText(((Path) result[0]).toString());

			}

		}

	}

	/**

	 * Ensures that both text fields are set.

	 */

	private void dialogChanged() {

		IResource container = ResourcesPlugin.getWorkspace().getRoot()

				.findMember(new Path(getContainerName()));

		String fileName = getFileName();

		if (getContainerName().length() == 0) {

			updateStatus("File container must be specified");

			return;

		}

		if (container == null

				|| (container.getType() & (IResource.PROJECT | IResource.FOLDER)) == 0) {

			updateStatus("File container must exist");

			return;

		}

		if (!container.isAccessible()) {

			updateStatus("Project must be writable");

			return;

		}

		if (fileName.length() == 0) {

			updateStatus("File name must be specified");

			return;

		}

		if (fileName.replace('\\', '/').indexOf('/', 1) > 0) {

			updateStatus("File name must be valid");

			return;

		}

		int dotLoc = fileName.lastIndexOf('.');

		if (dotLoc != -1) {

			String ext = fileName.substring(dotLoc + 1);

			if (ext.equalsIgnoreCase("html") == false) {

				updateStatus("File extension must be \"html\"");

				return;

			}

		}

		updateStatus(null);

	}

	private void updateStatus(String message) {

		setErrorMessage(message);

		setPageComplete(message == null);

	}

	public String getContainerName() {

		return containerText.getText();

	}

	public String getFileName() {

		return fileText.getText();

	}

}