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/*******************************************************************************
 * Copyright (c) 2000, 2007 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.debug.ui;


import org.eclipse.jface.resource.CompositeImageDescriptor;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.Point;

/**
 * A JDIImageDescriptor consists of a main icon and several adornments. The adornments
 * are computed according to flags set on creation of the descriptor.
 */
public class JDIImageDescriptor extends CompositeImageDescriptor {
  
  /** Flag to render the is out of synch adornment */
  public final static int IS_OUT_OF_SYNCH=       0x0001;
  /** Flag to render the may be out of synch adornment */
  public final static int MAY_BE_OUT_OF_SYNCH=     0x0002;
  /** Flag to render the installed breakpoint adornment */
  public final static int INSTALLED=           0x0004;
  /** Flag to render the entry method breakpoint adornment */
  public final static int ENTRY=             0x0008;
  /** Flag to render the exit method breakpoint adornment */
  public final static int EXIT=             0x0010;
  /** Flag to render the enabled breakpoint adornment */
  public final static int ENABLED=            0x0020;
  /** Flag to render the conditional breakpoint adornment */
  public final static int CONDITIONAL=          0x0040;
  /** Flag to render the caught breakpoint adornment */
  public final static int CAUGHT=            0x0080;
  /** Flag to render the uncaught breakpoint adornment */
  public final static int UNCAUGHT=          0x0100;
  /** Flag to render the scoped breakpoint adornment */
  public final static int SCOPED=            0x0200;
  
  /** Flag to render the owning a monitor thread adornment */
  public final static int OWNS_MONITOR=        0x0400;
  /** Flag to render the owned monitor adornment */
  public final static int OWNED_MONITOR=        0x0800;
  /** Flag to render the in contention monitor adornment */
  public final static int CONTENTED_MONITOR=      0x1000;
  /** Flag to render the in contention for monitor thread adornment */
  public final static int IN_CONTENTION_FOR_MONITOR=  0x2000;
  /** Flag to render the in deadlock adornment */
  public final static int IN_DEADLOCK=         0x8000;
  
  /** Flag to render the synchronized stack frame adornment */
  public final static int SYNCHRONIZED=        0x4000;

  private ImageDescriptor fBaseImage;
  private int fFlags;
  private Point fSize;
  
  /**
   * Create a new JDIImageDescriptor.
   * 
   * @param baseImage an image descriptor used as the base image
   * @param flags flags indicating which adornments are to be rendered
   * 
   */
  public JDIImageDescriptor(ImageDescriptor baseImage, int flags) {
    setBaseImage(baseImage);
    setFlags(flags);
  }
  
  /**
   * @see CompositeImageDescriptor#getSize()
   */
  protected Point getSize() {
    if (fSize == null) {
      ImageData data= getBaseImage().getImageData();
      setSize(new Point(data.width, data.height));
    }
    return fSize;
  }
  
  /**
   * @see Object#equals(java.lang.Object)
   */
  public boolean equals(Object object) {
    if (!(object instanceof JDIImageDescriptor)){
      return false;
    }
      
    JDIImageDescriptor other= (JDIImageDescriptor)object;
    return (getBaseImage().equals(other.getBaseImage()) && getFlags() == other.getFlags());
  }
  
  /**
   * @see Object#hashCode()
   */
  public int hashCode() {
    return getBaseImage().hashCode() | getFlags();
  }
  
  /**
   * @see CompositeImageDescriptor#drawCompositeImage(int, int)
   */
  protected void drawCompositeImage(int width, int height) {
    ImageData bg= getBaseImage().getImageData();
    if (bg == null) {
      bg= DEFAULT_IMAGE_DATA;
    }
    drawImage(bg, 0, 0);
    drawOverlays();
  }

  private ImageData getImageData(String imageDescriptorKey) {
    return JavaDebugImages.getImageDescriptor(imageDescriptorKey).getImageData();
  }
  /**
   * Add any overlays to the image as specified in the flags.
   */
  protected void drawOverlays() {
    int flags= getFlags();
    int x= 0;
    int y= 0;
    ImageData data= null;
    if ((flags & IS_OUT_OF_SYNCH) != 0) {
      x= getSize().x;
      y= 0;
      data= getImageData(JavaDebugImages.IMG_OVR_OUT_OF_SYNCH);
      x -= data.width;
      drawImage(data, x, y);
    } else if ((flags & MAY_BE_OUT_OF_SYNCH) != 0) {
      x= getSize().x;
      y= 0;
      data= getImageData(JavaDebugImages.IMG_OVR_MAY_BE_OUT_OF_SYNCH);
      x -= data.width;
      drawImage(data, x, y);
    } else if ((flags & SYNCHRONIZED) != 0) {
      x= getSize().x;
      y= 0;
      data= getImageData(JavaDebugImages.IMG_OVR_SYNCHRONIZED);
      x -= data.width;
      drawImage(data, x, y);
    } else {
      if ((flags & IN_DEADLOCK) != 0) {
        x= 0;
        y= 0;
        data= getImageData(JavaDebugImages.IMG_OVR_IN_DEADLOCK);
        drawImage(data, x, y);
      }
      if ((flags & OWNED_MONITOR) != 0) {
        x= getSize().x;
        y= getSize().y;
        data= getImageData(JavaDebugImages.IMG_OVR_OWNED);
        x -= data.width;
        y -= data.height;
        drawImage(data, x, y);
      } else if ((flags & CONTENTED_MONITOR) != 0) {
        x= getSize().x;
        y= getSize().y;
        data= getImageData(JavaDebugImages.IMG_OVR_IN_CONTENTION);
        x -= data.width;
        y -= data.height;
        drawImage(data, x, y);
      } else if ((flags & OWNS_MONITOR) != 0) {
        x= getSize().x;
        y= 0;
        data= getImageData(JavaDebugImages.IMG_OVR_OWNS_MONITOR);
        x -= data.width;
        drawImage(data, x, y);
      } else if ((flags & IN_CONTENTION_FOR_MONITOR) != 0) {
        x= getSize().x;
        y= 0;
        data= getImageData(JavaDebugImages.IMG_OVR_IN_CONTENTION_FOR_MONITOR);
        x -= data.width;
        drawImage(data, x, y);
      } else {
        drawBreakpointOverlays();
      }
    }
  }
  
  protected void drawBreakpointOverlays() {
    int flags= getFlags();
    int x= 0;
    int y= 0;
    ImageData data= null;
    if ((flags & INSTALLED) != 0) {
      x= 0;
      y= getSize().y;
      if ((flags & ENABLED) !=0) {
        data= getImageData(JavaDebugImages.IMG_OVR_BREAKPOINT_INSTALLED);
      } else {
        data= getImageData(JavaDebugImages.IMG_OVR_BREAKPOINT_INSTALLED_DISABLED);
      }
        
      y -= data.height;
      drawImage(data, x, y);
    }
    if ((flags & CAUGHT) != 0) {
      if ((flags & ENABLED) !=0) {
      data= getImageData(JavaDebugImages.IMG_OVR_CAUGHT_BREAKPOINT);
      } else {
        data= getImageData(JavaDebugImages.IMG_OVR_CAUGHT_BREAKPOINT_DISABLED);
      }
      x= 0;
      y= 0;
      drawImage(data, x, y);
    }
    if ((flags & UNCAUGHT) != 0) {
      if ((flags & ENABLED) !=0) {
        data= getImageData(JavaDebugImages.IMG_OVR_UNCAUGHT_BREAKPOINT);
      } else {
        data= getImageData(JavaDebugImages.IMG_OVR_UNCAUGHT_BREAKPOINT_DISABLED);
      }
      x= data.width;
      y= data.height;
      drawImage(data, x, y);
    }
    if ((flags & SCOPED) != 0) {
      if ((flags & ENABLED) !=0) {
        data= getImageData(JavaDebugImages.IMG_OVR_SCOPED_BREAKPOINT);
      } else {
        data= getImageData(JavaDebugImages.IMG_OVR_SCOPED_BREAKPOINT_DISABLED);
      }
      x= 0;
      y= getSize().y;
      y-= data.height;
      drawImage(data, x, y);
    }
    if ((flags & CONDITIONAL) != 0) {
      if ((flags & ENABLED) !=0) {
        data= getImageData(JavaDebugImages.IMG_OVR_CONDITIONAL_BREAKPOINT);
      } else {
        data= getImageData(JavaDebugImages.IMG_OVR_CONDITIONAL_BREAKPOINT_DISABLED);
      }
      x= 0;
      y= 0;
      drawImage(data, x, y);
    }
    if ((flags & ENTRY) != 0) {
      x= getSize().x;
      y= 0;
      if ((flags & ENABLED) !=0) {
        data= getImageData(JavaDebugImages.IMG_OVR_METHOD_BREAKPOINT_ENTRY);
      } else {
        data= getImageData(JavaDebugImages.IMG_OVR_METHOD_BREAKPOINT_ENTRY_DISABLED);
      }
      x -= data.width;
      x = x - 2;
      drawImage(data, x, y);
    }
    if ((flags & EXIT)  != 0){
      x= getSize().x;
      y= getSize().y;
      if ((flags & ENABLED) != 0) {
        data= getImageData(JavaDebugImages.IMG_OVR_METHOD_BREAKPOINT_EXIT);
      } else {
        data= getImageData(JavaDebugImages.IMG_OVR_METHOD_BREAKPOINT_EXIT_DISABLED);
      }
      x -= data.width;
      x = x - 2;
      y -= data.height;
      drawImage(data, x, y);
    }
  }
  protected ImageDescriptor getBaseImage() {
    return fBaseImage;
  }

  protected void setBaseImage(ImageDescriptor baseImage) {
    fBaseImage = baseImage;
  }

  protected int getFlags() {
    return fFlags;
  }

  protected void setFlags(int flags) {
    fFlags = flags;
  }

  protected void setSize(Point size) {
    fSize = size;
  }
}
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