IconLoadHelper.java

package jetbrains.mps.ide.icons;

/*Generated by MPS */

import jetbrains.mps.util.annotation.ToRemove;
import org.apache.log4j.Logger;
import org.apache.log4j.LogManager;
import java.awt.MediaTracker;
import javax.swing.Icon;
import org.jetbrains.annotations.NonNls;
import jetbrains.mps.vfs.IFile;
import jetbrains.mps.vfs.FileSystem;
import java.io.InputStream;
import java.io.IOException;
import org.apache.log4j.Level;
import org.jetbrains.annotations.NotNull;
import javax.swing.ImageIcon;

/**
 * 
 * @deprecated 
 */
@Deprecated
@ToRemove(version = 3.5)
public class IconLoadHelper {
  private static final Logger LOG = LogManager.getLogger(IconLoadHelper.class);
  private static final int IMAGE_LOADED = ~(((MediaTracker.ABORTED | MediaTracker.ERRORED | MediaTracker.LOADING)));

  public static Icon loadIcon(@NonNls String iconPath) {
    IFile file = FileSystem.getInstance().getFileByPath(iconPath);
    return getIconFor(file);
  }

  private static Icon getIconFor(IFile file) {
    if (!(file.exists())) {
      return null;
    }
    InputStream is = null;
    try {
      is = file.openInputStream();
      return loadIcon(is);
    } catch (IOException e) {
      if (LOG.isEnabledFor(Level.ERROR)) {
        LOG.error("", e);
      }
      return null;
    } finally {
      try {
        if (is != null) {
          is.close();
        }
      } catch (IOException e) {
        if (LOG.isEnabledFor(Level.ERROR)) {
          LOG.error("", e);
        }
      }
    }
  }

  /*package*/ static Icon loadIcon(@NotNull InputStream is) {
    byte[] image = new byte[0];
    try {
      image = new byte[is.available()];
    } catch (IOException e) {
      if (LOG.isEnabledFor(Level.ERROR)) {
        LOG.error("", e);
      }
    }
    try {
      int current = 0;
      while (true) {
        int result = is.read(image, current, image.length - current);
        if (result == -1 || result == 0) {
          break;
        } else {
          current += result;
        }
      }
    } catch (IOException e) {
      if (LOG.isEnabledFor(Level.ERROR)) {
        LOG.error("", e);
      }
    }
    ImageIcon icon = new ImageIcon(image);
    if ((icon.getImageLoadStatus() & IMAGE_LOADED) != 0) {
      return icon;
    }
    return null;
  }
}