package filetree;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.LabelProviderChangedEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.program.Program;

/**
 * This class provides the labels for the file tree
 */

class FileTreeLabelProvider implements ILabelProvider {
  // The listeners
  private List<ILabelProviderListener> listeners;

  // Images for tree nodes
  private Image file;

  private Image dir;

  // Label provider state: preserve case of file names/directories
  boolean preserveCase;

  /**
   * Constructs a FileTreeLabelProvider
   */
  public FileTreeLabelProvider() {
    // Create the list to hold the listeners
    listeners = new ArrayList<ILabelProviderListener>();

    // Create the images
    try {
      file = new Image(null, new FileInputStream("icons/file_obj.gif"));
      dir  = new Image(null, new FileInputStream("icons/fldr_obj.gif"));
    } catch (FileNotFoundException e) {
      // Swallow it; we'll do without images
    }
  }

  /**
   * Sets the preserve case attribute
   * 
   * @param preserveCase
   *            the preserve case attribute
   */
  public void setPreserveCase(boolean preserveCase) {
    this.preserveCase = preserveCase;

    // Since this attribute affects how the labels are computed,
    // notify all the listeners of the change.
    LabelProviderChangedEvent event = new LabelProviderChangedEvent(this);
    for (int i = 0, n = listeners.size(); i < n; i++) {
      ILabelProviderListener ilpl = (ILabelProviderListener) listeners
          .get(i);
      ilpl.labelProviderChanged(event);
    }
  }

  /**
   * Gets the image to display for a node in the tree
   * 
   * @param arg0
   *            the node
   * @return Image
   */
  public Image getImage(Object arg0) {
    // If the node represents a directory, return the directory image.
    // Otherwise, return the file image.
//	  Program.findProgram(".txt" ).getImageData();
    return ((DataItem) arg0).isFolder() ? dir : file;
  }

  /**
   * Gets the text to display for a node in the tree
   * 
   * @param arg0
   *            the node
   * @return String
   */
  public String getText(Object arg0) {
    // Get the name of the file
    String text = ((DataItem) arg0).getName();

    // If name is blank, get the path
    if (text.length() == 0) {
      //text = ((DataItem) arg0).getPath();
    }
    System.out.println( "Text: "+text );
    // Check the case settings before returning the text
    return preserveCase ? text : text.toUpperCase();
  }

  /**
   * Adds a listener to this label provider
   * 
   * @param arg0
   *            the listener
   */
  public void addListener(ILabelProviderListener arg0) {
    listeners.add(arg0);
  }

  /**
   * Called when this LabelProvider is being disposed
   */
  public void dispose() {
    // Dispose the images
    if (dir != null)
      dir.dispose();
    if (file != null)
      file.dispose();
  }

  /**
   * Returns whether changes to the specified property on the specified
   * element would affect the label for the element
   * 
   * @param arg0
   *            the element
   * @param arg1
   *            the property
   * @return boolean
   */
  public boolean isLabelProperty(Object arg0, String arg1) {
    return false;
  }

  /**
   * Removes the listener
   * 
   * @param arg0
   *            the listener to remove
   */
  public void removeListener(ILabelProviderListener arg0) {
    listeners.remove(arg0);
  }
}