/*
 * Copyright (c) 2007-2009, 2011, 2012, 2015, 2016 Eike Stepper (Loehne, Germany) and others.
 * 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:
 *    Eike Stepper - initial API and implementation
 *    Victor Roldan Betancort - maintenance
 */
package org.eclipse.emf.cdo.internal.ui.bundle;

import org.eclipse.emf.cdo.ui.CDOEditorOpener;
import org.eclipse.emf.cdo.ui.CDOLabelDecorator;
import org.eclipse.emf.cdo.ui.OverlayImage;

import org.eclipse.net4j.util.om.OMBundle;
import org.eclipse.net4j.util.om.OMPlatform;
import org.eclipse.net4j.util.om.log.OMLogger;
import org.eclipse.net4j.util.om.pref.OMPreference;
import org.eclipse.net4j.util.om.pref.OMPreferences;
import org.eclipse.net4j.util.om.trace.OMTracer;
import org.eclipse.net4j.util.ui.UIActivator;

import org.eclipse.emf.common.CommonPlugin;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.edit.provider.ComposedImage;
import org.eclipse.emf.edit.ui.provider.ExtendedImageRegistry;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;

/**
 * The <em>Operations & Maintenance</em> class of this bundle.
 *
 * @author Eike Stepper
 */
public abstract class OM
{
  public static final String BUNDLE_ID = "org.eclipse.emf.cdo.ui"; //$NON-NLS-1$

  public static final OMBundle BUNDLE = OMPlatform.INSTANCE.bundle(BUNDLE_ID, OM.class);

  public static final OMTracer DEBUG = BUNDLE.tracer("debug"); //$NON-NLS-1$

  public static final OMLogger LOG = BUNDLE.logger();

  public static final OMPreferences PREFS = BUNDLE.preferences();

  public static final OMPreference<String> PREF_LABEL_DECORATION = //
      PREFS.init("PREF_LABEL_DECORATION", CDOLabelDecorator.DEFAULT_DECORATION); //$NON-NLS-1$

  public static final OMPreference<String[]> PREF_HISTORY_SELECT_PACKAGES = //
      PREFS.initArray("PREF_HISTORY_SELECT_PACKAGES"); //$NON-NLS-1$

  public static final OMPreference<String[]> PREF_HISTORY_CONNECTORS = //
      PREFS.init("PREF_HISTORY_CONNECTORS", new String[] { "tcp://localhost" }); //$NON-NLS-1$

  public static final OMPreference<String[]> PREF_HISTORY_REPOSITORIES = //
      PREFS.init("PREF_HISTORY_REPOSITORIES", new String[] { "repo1" }); //$NON-NLS-1$

  public static final OMPreference<Boolean> PREF_AUTOMATIC_PACKAGE_REGISTRY = //
      PREFS.init("PREF_AUTOMATIC_PACKAGE_REGISTRY", true); //$NON-NLS-1$

  public static final OMPreference<Boolean> PREF_LEGACY_MODE_DEFAULT = //
      PREFS.init("PREF_LEGACY_MODE_DEFAULT", true); //$NON-NLS-1$

  public static final OMPreference<Boolean> PREF_EDITOR_AUTO_RELOAD = //
      PREFS.init("PREF_EDITOR_AUTO_RELOAD", true); //$NON-NLS-1$

  private static Boolean historySupportAvailable;

  private static Boolean compareSupportAvailable;

  public static boolean isHistorySupportAvailable()
  {
    if (historySupportAvailable == null)
    {
      try
      {
        historySupportAvailable = CommonPlugin.loadClass("org.eclipse.emf.cdo.ui.team", "org.eclipse.emf.cdo.ui.internal.team.history.CDOHistoryPage") != null;
      }
      catch (Throwable ex)
      {
        historySupportAvailable = false;
      }
    }

    return historySupportAvailable;
  }

  public static boolean isCompareSupportAvailable()
  {
    if (compareSupportAvailable == null)
    {
      try
      {
        compareSupportAvailable = CommonPlugin.loadClass("org.eclipse.emf.cdo.ui.compare", "org.eclipse.emf.cdo.ui.compare.CDOCompareEditorUtil") != null;
      }
      catch (Throwable ex)
      {
        compareSupportAvailable = false;
      }
    }

    return compareSupportAvailable;
  }

  public static Image getOverlayImage(Object image, Object overlayImage, int x, int y)
  {
    ComposedImage composedImage = new OverlayImage(image, overlayImage, x, y);
    return ExtendedImageRegistry.INSTANCE.getImage(composedImage);
  }

  public static Image getImage(String imagePath)
  {
    return ExtendedImageRegistry.INSTANCE.getImage(getBundleURI(imagePath));
  }

  public static ImageDescriptor getImageDescriptor(String imagePath)
  {
    return ExtendedImageRegistry.INSTANCE.getImageDescriptor(getBundleURI(imagePath));
  }

  private static URI getBundleURI(String path)
  {
    return URI.createPlatformPluginURI(BUNDLE_ID + "/" + path, true);
  }

  /**
   * @author Eike Stepper
   */
  public static final class Activator extends UIActivator
  {
    public static Activator INSTANCE;

    public Activator()
    {
      super(BUNDLE);
      INSTANCE = this;
    }

    @Override
    protected void doStart() throws Exception
    {
      CDOEditorOpener.Registry.INSTANCE.activate();
    }

    @Override
    protected void doStop() throws Exception
    {
      CDOEditorOpener.Registry.INSTANCE.deactivate();
    }
  }
}