/*******************************************************************************
 * Copyright (c) 2007 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.tests.views.properties.tabbed.override.tablist;

import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.tests.views.properties.tabbed.model.Element;
import org.eclipse.ui.tests.views.properties.tabbed.override.items.IOverrideTestsItem;
import org.eclipse.ui.views.properties.tabbed.ITabItem;

/**
 * The abstract implementation of a tab list.
 * <p>
 * The OverrideTestsView TabbedPropertySheetPage example is a look at the
 * properties view after the migration of a TabFolder/TabItem framework to the
 * tabbed properties view. In the case of a TabFolder, the folder (provider)
 * knows both the tab labels and tab items. This aligns to the tabbed properties
 * view, but the tab labels are tab descriptors and tab items are section
 * descriptions. This does not work with the default framework as the tabs
 * provide the sections. In this case, the IOverridableTabListContentProvider
 * framework has been provided.
 * <p>
 * The overridable tab list is a content provider that provides both the
 * sections and the tab labels.
 *
 * @author Anthony Hunter
 * @since 3.4
 */
public abstract class AbstractTabList implements IOverrideTestsTabList {

	private Composite composite;

	private int selectedTabItem;

	@Override
	public boolean appliesTo(Element element) {
		return false;
	}

	@Override
	public void createControls(Composite parent) {
		this.composite = parent;
		OverrideTestsTabItem activeTab = (OverrideTestsTabItem) (getTabs()[selectedTabItem]);
		activeTab.getItem().createControls(parent);
	}

	@Override
	public void dispose() {
		OverrideTestsTabItem activeTab = (OverrideTestsTabItem) (getTabs()[selectedTabItem]);
		activeTab.getItem().dispose();
	}

	@Override
	public ITabItem[] getTabs() {
		IOverrideTestsItem[] items = getItems();
		OverrideTestsTabItem[] tabs = new OverrideTestsTabItem[items.length];

		for (int i = 0; i < items.length; i++) {
			tabs[i] = new OverrideTestsTabItem(items[i]);
			if (i == selectedTabItem) {
				tabs[i].setSelected(true);
			}
		}

		return tabs;
	}

	@Override
	public void selectionChanged(Element element) {
		ITabItem[] tabs = getTabs();
		for (int i = 0; i < tabs.length; i++) {
			if (tabs[i].getText().equals(element.getName())) {
				selectedTabItem = i;
				break;
			}
		}
	}

	@Override
	public void selectTab(int index) {
		if (selectedTabItem == index) {
			return;
		}
		OverrideTestsTabItem activeTab = (OverrideTestsTabItem) (getTabs()[selectedTabItem]);
		activeTab.getItem().dispose();

		selectedTabItem = index;

		activeTab = (OverrideTestsTabItem) (getTabs()[selectedTabItem]);
		activeTab.getItem().createControls(composite);
		composite.layout(true);
	}
}
