/*******************************************************************************
 * Copyright (c) 2011 BSI Business Systems Integration AG.
 * 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:
 *     BSI Business Systems Integration AG - initial API and implementation
 *******************************************************************************/
package org.eclipse.scout.rt.ui.rap.util;

import org.eclipse.rap.rwt.widgets.FileUpload;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.ui.forms.FormColors;
import org.eclipse.ui.forms.HyperlinkGroup;
import org.eclipse.ui.forms.widgets.ExpandableComposite;
import org.eclipse.ui.forms.widgets.Form;
import org.eclipse.ui.forms.widgets.FormText;
import org.eclipse.ui.forms.widgets.FormToolkit;
import org.eclipse.ui.forms.widgets.Hyperlink;
import org.eclipse.ui.forms.widgets.ImageHyperlink;
import org.eclipse.ui.forms.widgets.ScrolledForm;
import org.eclipse.ui.forms.widgets.ScrolledPageBook;
import org.eclipse.ui.forms.widgets.Section;

/**
 * Wrapper class for a {@link FormToolkit}. All methods are delegated to the given
 * tool kit.
 * 
 * @see FormToolkit
 */
public class WrappedFormToolkit {
  protected FormToolkit kit;

  public WrappedFormToolkit(FormToolkit kit) {
    this.kit = kit;
  }

  public FormToolkit getFormToolkit() {
    return kit;
  }

  public void dispose() {
    if (kit != null) {
      kit.dispose();
    }
    kit = null;
  }

  public void adapt(Composite composite) {
    kit.adapt(composite);
  }

  public void adapt(Control control, boolean trackFocus, boolean trackKeyboard) {
    kit.adapt(control, trackFocus, trackKeyboard);
  }

  /**
   * Creates a button as a part of the form.
   * 
   * @param parent
   *          the button parent
   * @param text
   *          an optional text for the button (can be <code>null</code>)
   * @param style
   *          the button style (for example, <code>SWT.PUSH</code>)
   * @return the button widget
   */
  public Button createButton(Composite parent, String text, int style) {
    return kit.createButton(parent, text, style);
  }

  /**
   * Creates the composite as a part of the form.
   * 
   * @param parent
   *          the composite parent
   * @return the composite widget
   */
  public Composite createComposite(Composite parent) {
    return kit.createComposite(parent, SWT.NO_FOCUS);
  }

  public Group createGroup(Composite parent, int style) {
    Group group = new Group(parent, style);
    kit.adapt(group);
    return group;
  }

  /**
   * Creates the composite as part of the form using the provided style.
   * 
   * @param parent
   *          the composite parent
   * @param style
   *          the composite style
   * @return the composite widget
   */
  public Composite createComposite(Composite parent, int style) {
    style |= SWT.NO_FOCUS;
    return kit.createComposite(parent, style);
  }

  /**
   * Creats the composite that can server as a separator between various parts
   * of a form. Separator height should be controlled by setting the height hint
   * on the layout data for the composite.
   * 
   * @param parent
   *          the separator parent
   * @return the separator widget
   */
  public Composite createCompositeSeparator(Composite parent) {
    return kit.createCompositeSeparator(parent);
  }

  /**
   * Creates a label as a part of the form.
   * 
   * @param parent
   *          the label parent
   * @param text
   *          the label text
   * @return the label widget
   */
  public Label createLabel(Composite parent, String text) {
    return kit.createLabel(parent, text);
  }

  /**
   * Creates a label as a part of the form.
   * 
   * @param parent
   *          the label parent
   * @param text
   *          the label text
   * @param style
   *          the label style
   * @return the label widget
   */
  public Label createLabel(Composite parent, String text, int style) {
    return kit.createLabel(parent, text, style);
  }

  /**
   * Creates a hyperlink as a part of the form. The hyperlink will be added to
   * the hyperlink group that belongs to this toolkit.
   * 
   * @param parent
   *          the hyperlink parent
   * @param text
   *          the text of the hyperlink
   * @param style
   *          the hyperlink style
   * @return the hyperlink widget
   */
  public Hyperlink createHyperlink(Composite parent, String text, int style) {
    return kit.createHyperlink(parent, text, style);
  }

  /**
   * Creates an image hyperlink as a part of the form. The hyperlink will be
   * added to the hyperlink group that belongs to this toolkit.
   * 
   * @param parent
   *          the hyperlink parent
   * @param style
   *          the hyperlink style
   * @return the image hyperlink widget
   */
  public ImageHyperlink createImageHyperlink(Composite parent, int style) {
    return kit.createImageHyperlink(parent, style);
  }

  /**
   * Creates a rich text as a part of the form.
   * 
   * @param parent
   *          the rich text parent
   * @param trackFocus
   *          if <code>true</code>, the toolkit will monitor focus transfers to
   *          ensure that the hyperlink in focus is visible in the form.
   * @return the rich text widget
   */
  public FormText createFormText(Composite parent, boolean trackFocus) {
    return kit.createFormText(parent, trackFocus);
  }

  /**
   * Creates a section as a part of the form.
   * 
   * @param parent
   *          the section parent
   * @param sectionStyle
   *          the section style
   * @return the section widget
   */
  public Section createSection(Composite parent, int sectionStyle) {
    return kit.createSection(parent, sectionStyle);
  }

  /**
   * Creates an expandable composite as a part of the form.
   * 
   * @param parent
   *          the expandable composite parent
   * @param expansionStyle
   *          the expandable composite style
   * @return the expandable composite widget
   */
  public ExpandableComposite createExpandableComposite(Composite parent, int expansionStyle) {
    return kit.createExpandableComposite(parent, expansionStyle);
  }

  /**
   * Creates a separator label as a part of the form.
   * 
   * @param parent
   *          the separator parent
   * @param style
   *          the separator style
   * @return the separator label
   */
  public Label createSeparator(Composite parent, int style) {
    return kit.createSeparator(parent, style);
  }

  /**
   * Creates a table as a part of the form.
   * 
   * @param parent
   *          the table parent
   * @param style
   *          the table style
   * @return the table widget
   */
  public Table createTable(Composite parent, int style) {
    return kit.createTable(parent, style);
  }

  /**
   * Creates a text as a part of the form.
   * 
   * @param parent
   *          the text parent
   * @param value
   *          the text initial value
   * @return the text widget
   */
  public Text createText(Composite parent, String value) {
    return kit.createText(parent, value);
  }

  /**
   * Creates a text as a part of the form.
   * 
   * @param parent
   *          the text parent
   * @param value
   *          the text initial value
   * @param style
   *          the text style
   * @return the text widget
   */
  public Text createText(Composite parent, String value, int style) {
    return kit.createText(parent, value, style);
  }

  /**
   * Creates a tree widget as a part of the form.
   * 
   * @param parent
   *          the tree parent
   * @param style
   *          the tree style
   * @return the tree widget
   */
  public Tree createTree(Composite parent, int style) {
    return kit.createTree(parent, style);
  }

  /**
   * Creates a scrolled form widget in the provided parent. If you do not
   * require scrolling because there is already a scrolled composite up the
   * parent chain, use 'createForm' instead.
   * 
   * @param parent
   *          the scrolled form parent
   * @return the form that can scroll itself
   * @see #createForm
   */
  public ScrolledForm createScrolledForm(Composite parent) {
    return kit.createScrolledForm(parent);
  }

  /**
   * Creates a form widget in the provided parent. Note that this widget does
   * not scroll its content, so make sure there is a scrolled composite up the
   * parent chain. If you require scrolling, use 'createScrolledForm' instead.
   * 
   * @param parent
   *          the form parent
   * @return the form that does not scroll
   * @see #createScrolledForm
   */
  public Form createForm(Composite parent) {
    return kit.createForm(parent);
  }

  /**
   * Creates a scrolled page book widget as a part of the form.
   * 
   * @param parent
   *          the page book parent
   * @param style
   *          the text style
   * @return the scrolled page book widget
   */
  public ScrolledPageBook createPageBook(Composite parent, int style) {
    return kit.createPageBook(parent, style);
  }

  /**
   * Creates a upload widget.
   * 
   * @param parent
   *          the page book parent
   * @param style
   *          Supported styles:
   *          <ul>
   *          <li>{@link SWT#BORDER}
   *          </ul>
   * @return the upload widget
   */
  public FileUpload createFileUploadButton(Composite parent, int style) {
    FileUpload upload = new FileUpload(parent, style | getOrientation());
    adapt(upload, true, true);
    return upload;
  }

  /**
   * Takes advantage of the gradients and other capabilities to decorate the
   * form heading using colors computed based on the current skin and operating
   * system.
   * 
   * @since 3.7.0 June 2011
   * @param form
   *          the form to decorate
   */

  public void decorateFormHeading(Form form) {
    kit.decorateFormHeading(form);
  }

  /**
   * Returns the hyperlink group that manages hyperlinks for this toolkit.
   * 
   * @return the hyperlink group
   */
  public HyperlinkGroup getHyperlinkGroup() {
    return kit.getHyperlinkGroup();
  }

  /**
   * Sets the background color for the entire toolkit. The method delegates the
   * call to the FormColors object and also updates the hyperlink group so that
   * hyperlinks and other objects are in sync.
   * 
   * @param bg
   *          the new background color
   */
  public void setBackground(Color bg) {
    kit.setBackground(bg);
  }

  /**
   * Refreshes the hyperlink colors by loading from JFace settings.
   */
  public void refreshHyperlinkColors() {
    kit.refreshHyperlinkColors();
  }

  /**
   * Paints flat borders for widgets created by this toolkit within the provided
   * parent. Borders will not be painted if the global border style is
   * SWT.BORDER (i.e. if native borders are used). Call this method during
   * creation of a form composite to get the borders of its children painted.
   * Care should be taken when selection layout margins. At least one pixel
   * pargin width and height must be chosen to allow the toolkit to paint the
   * border on the parent around the widgets.
   * <p>
   * Borders are painted for some controls that are selected by the toolkit by default. If a control needs a border but
   * is not on its list, it is possible to force border in the following way:
   * 
   * <pre>
   *             widget.setData(FormToolkit.KEY_DRAW_BORDER, FormToolkit.TREE_BORDER);
   *             or
   *             widget.setData(FormToolkit.KEY_DRAW_BORDER, FormToolkit.TEXT_BORDER);
   * </pre>
   * 
   * @param parent
   *          the parent that owns the children for which the border needs to be
   *          painted.
   */
  public void paintBordersFor(Composite parent) {
    //XXX rap     kit.paintBordersFor(parent);
  }

  /**
   * Returns the colors used by this toolkit.
   * 
   * @return the color object
   */
  public FormColors getColors() {
    return kit.getColors();
  }

  /**
   * Returns the border style used for various widgets created by this toolkit.
   * The intent of the toolkit is to create controls with styles that yield a
   * 'flat' appearance. On systems where the native borders are already flat, we
   * set the style to SWT.BORDER and don't paint the borders ourselves.
   * Otherwise, the style is set to SWT.NULL, and borders are painted by the
   * toolkit.
   * 
   * @return the global border style
   */
  public int getBorderStyle() {
    return kit.getBorderStyle();
  }

  /**
   * Returns the margin required around the children whose border is being
   * painted by the toolkit using {@link #paintBordersFor(Composite)}. Since the
   * border is painted around the controls on the parent, a number of pixels
   * needs to be reserved for this border. For windowing systems where the
   * native border is used, this margin is 0.
   * 
   * @return the margin in the parent when children have their border painted
   * @since 3.7.0 June 2011
   */
  public int getBorderMargin() {
    return kit.getBorderMargin();
  }

  /**
   * Sets the border style to be used when creating widgets. The toolkit chooses
   * the correct style based on the platform but this value can be changed using
   * this method.
   * 
   * @param style
   *          <code>SWT.BORDER</code> or <code>SWT.NULL</code>
   * @see #getBorderStyle
   */
  public void setBorderStyle(int style) {
    kit.setBorderStyle(style);
  }

  /**
   * Returns the orientation that all the widgets created by this toolkit will
   * inherit, if set. Can be <code>SWT.NULL</code>, <code>SWT.LEFT_TO_RIGHT</code> and <code>SWT.RIGHT_TO_LEFT</code>.
   * 
   * @return orientation style for this toolkit, or <code>SWT.NULL</code> if not
   *         set. The default orientation is inherited from the Window default
   *         orientation.
   * @see org.eclipse.jface.window.Window#getDefaultOrientation()
   * @since 3.7.0 June 2011
   */
  public int getOrientation() {
    return kit.getOrientation();
  }

  /**
   * Sets the orientation that all the widgets created by this toolkit will
   * inherit. Can be <code>SWT.NULL</code>, <code>SWT.LEFT_TO_RIGHT</code> and <code>SWT.RIGHT_TO_LEFT</code>.
   * 
   * @param orientation
   *          style for this toolkit.
   * @since 3.7.0 June 2011
   */
  public void setOrientation(int orientation) {
    kit.setOrientation(orientation);
  }
}