org.jboss.tools.windup.ui.internal.rules.delegate.BaseTabStack.java Source code

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Here is the source code for org.jboss.tools.windup.ui.internal.rules.delegate.BaseTabStack.java

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/*******************************************************************************
 * Copyright (c) 2019 Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is 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:
 *   Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.jboss.tools.windup.ui.internal.rules.delegate;

import java.util.Map;

import javax.inject.Inject;

import org.eclipse.e4.core.contexts.ContextInjectionFactory;
import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.jface.resource.ColorRegistry;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CTabFolder;
import org.eclipse.swt.custom.CTabItem;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.IWorkbenchPreferenceConstants;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.forms.widgets.FormToolkit;
import org.jboss.tools.windup.ui.WindupUIPlugin;

import com.google.common.collect.Maps;

/**
 * Represents a stack of stabs.
 */
public class BaseTabStack {

    protected Map<CTabItem, TabWrapper> tabs = Maps.newHashMap();

    @Inject
    protected IEclipseContext context;
    @Inject
    @Optional
    protected FormToolkit toolkit;

    protected CTabFolder folder;

    protected void createFolder(Composite parent) {
        GridDataFactory.fillDefaults().grab(true, true).applyTo(parent);
        ColorRegistry reg = JFaceResources.getColorRegistry();
        Color c1 = reg.get("org.eclipse.ui.workbench.ACTIVE_TAB_BG_START"), //$NON-NLS-1$
                c2 = reg.get("org.eclipse.ui.workbench.ACTIVE_TAB_BG_END"); //$NON-NLS-1$
        folder = new CTabFolder(parent, SWT.NO_REDRAW_RESIZE | SWT.FLAT);
        folder.setSelectionBackground(new Color[] { c1, c2 }, new int[] { 100 }, true);
        folder.setSelectionForeground(reg.get("org.eclipse.ui.workbench.ACTIVE_TAB_TEXT_COLOR")); //$NON-NLS-1$
        folder.setSimple(PlatformUI.getPreferenceStore()
                .getBoolean(IWorkbenchPreferenceConstants.SHOW_TRADITIONAL_STYLE_TABS));
        folder.setBorderVisible(true);
        GridDataFactory.fillDefaults().grab(true, true).applyTo(folder);
        GridData gd = new GridData(GridData.FILL_BOTH);
        gd.horizontalSpan = 2;
        folder.setLayoutData(gd);
        folder.setFont(parent.getFont());
        folder.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                CTabItem item = folder.getSelection();
                tabItemSelected(item);
            }
        });
    }

    protected void tabItemSelected(CTabItem item) {
    }

    protected <T> TabWrapper addTab(Class<T> clazz) {
        CTabItem item = new CTabItem(folder, SWT.BORDER);
        Composite parent = toolkit.createComposite(folder);
        GridLayoutFactory.fillDefaults().applyTo(parent);
        GridDataFactory.fillDefaults().grab(true, true).applyTo(parent);
        item.setControl(parent);
        IEclipseContext child = createTabContext(parent);
        child.set(CTabItem.class, item);
        T object = create(clazz, child);
        TabWrapper wrapper = new TabWrapper(object, child, item);
        tabs.put(item, wrapper);
        return wrapper;
    }

    protected IEclipseContext createTabContext(Composite parent) {
        IEclipseContext child = context.createChild();
        child.set(Composite.class, parent);
        child.set(FormToolkit.class, toolkit);
        return child;
    }

    protected <T> T create(Class<T> clazz, IEclipseContext context) {
        try {
            T result = ContextInjectionFactory.make(clazz, context);
            return result;
        } catch (Exception e) {
            WindupUIPlugin.logError("BaseTabStack::106 :: Error occurred while trying to create.", e);
            WindupUIPlugin.logErrorMessage("Class: " + clazz.getName());
            WindupUIPlugin.logErrorMessage("Message: " + e.getMessage());
        }
        return null;
    }

    public Control getControl() {
        return folder;
    }

    protected void closeTab() {
    }

    /**
     * A wrapper for each child tab.
     */
    public static class TabWrapper {

        private Object object;
        private IEclipseContext context;
        private CTabItem item;

        public TabWrapper(Object object, IEclipseContext context, CTabItem item) {
            this.context = context;
            this.object = object;
            this.item = item;
        }

        public Object getObject() {
            return object;
        }

        public IEclipseContext getContext() {
            return context;
        }

        public CTabItem getItem() {
            return item;
        }
    }
}