~repos /gdx-studio

/*
 * 03/21/2010
 *
 * Copyright (C) 2010 Robert Futrell
 * robert_futrell at users.sourceforge.net
 * http://fifesoft.com/rsyntaxtextarea
 *
 * This library is distributed under a modified BSD license.  See the included
 * RSTALanguageSupport.License.txt file for details.
 */
package org.fife.rsta.ac.c;

import java.net.URL;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JList;

import org.fife.ui.autocomplete.Completion;
import org.fife.ui.autocomplete.CompletionCellRenderer;
import org.fife.ui.autocomplete.EmptyIcon;
import org.fife.ui.autocomplete.FunctionCompletion;
import org.fife.ui.autocomplete.VariableCompletion;


/**
 * The cell renderer used for the C programming language.
 *
 * @author Robert Futrell
 * @version 1.0
 */
class CCellRenderer extends CompletionCellRenderer {

  private Icon variableIcon;
  private Icon functionIcon;
  private Icon emptyIcon;


  /**
   * Constructor.
   */
  public CCellRenderer() {
    emptyIcon = new EmptyIcon(16); // Should be done first
    variableIcon = getIcon("var.png");
    functionIcon = getIcon("function.png");
  }


  /**
   * Returns an icon.
   *
   * @param resource The icon to retrieve.  This should either be a file,
   *        or a resource loadable by the current ClassLoader.
   * @return The icon.
   */
  private Icon getIcon(String resource) {
    URL url = getClass().getResource(resource); // Should never be null
    return url!=null ? new ImageIcon(url) : emptyIcon;
  }


  /**
   * {@inheritDoc}
   */
  protected void prepareForOtherCompletion(JList list,
      Completion c, int index, boolean selected, boolean hasFocus) {
    super.prepareForOtherCompletion(list, c, index, selected, hasFocus);
    setIcon(emptyIcon);
  }


  /**
   * {@inheritDoc}
   */
  protected void prepareForVariableCompletion(JList list,
      VariableCompletion vc, int index, boolean selected,
      boolean hasFocus) {
    super.prepareForVariableCompletion(list, vc, index, selected,
                    hasFocus);
    setIcon(variableIcon);
  }


  /**
   * {@inheritDoc}
   */
  protected void prepareForFunctionCompletion(JList list,
      FunctionCompletion fc, int index, boolean selected,
      boolean hasFocus) {
    super.prepareForFunctionCompletion(list, fc, index, selected,
                    hasFocus);
    setIcon(functionIcon);
  }


}