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/*******************************************************************************
* Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.text.source;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Canvas;
/**
* Extension interface for <code>IAnnotationAccess</code>.
* Allows to get a label for the annotation's type.
* </code>.
*
* @since 3.0
*/
public interface IAnnotationAccessExtension {
/**
* The default annotation layer.
*/
static final int DEFAULT_LAYER= IAnnotationPresentation.DEFAULT_LAYER;
/**
* Returns the label for the given annotation's type.
*
* @param annotation the annotation
* @return the label the given annotation's type or <code>null</code> if no such label exists
*/
String getTypeLabel(Annotation annotation);
/**
* Returns the layer for given annotation. Annotations are considered
* being located at layers and are considered being painted starting with
* layer 0 upwards. Thus an annotation at layer 5 will be drawn on top of
* all co-located annotations at the layers 4 - 0.
*
* @param annotation the annotation
* @return the layer of the given annotation
*/
int getLayer(Annotation annotation);
/**
* Draws a graphical representation of the given annotation within the given bounds.
*
* @param annotation the given annotation
* @param gc the drawing GC
* @param canvas the canvas to draw on
* @param bounds the bounds inside the canvas to draw on
*/
void paint(Annotation annotation, GC gc, Canvas canvas, Rectangle bounds);
/**
* Returns <code>true</code> if painting <code>annotation</code> will produce something
* meaningful, <code>false</code> if not. E.g. if no image is available.
*
* @param annotation the annotation to check for paintability
* @return <code>true</code> if painting <code>annotation</code> will succeed
*/
boolean isPaintable(Annotation annotation);
/**
* Returns <code>true</code> if the given annotation is of the given type
* or <code>false</code> otherwise.
*
* @param annotationType the annotation type
* @param potentialSupertype the potential super annotation type
* @return <code>true</code> if annotation type is a subtype of the potential annotation super type
*/
boolean isSubtype(Object annotationType, Object potentialSupertype);
/**
* Returns the list of super types for the given annotation type. This does not include the type
* itself. The index in the array of super types indicates the length of the path in the hierarchy
* graph to the given annotation type.
*
* @param annotationType the annotation type to check
* @return the super types for the given annotation type
*/
Object[] getSupertypes(Object annotationType);
}
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