package com.aptana.editor.php.internal.ui.editor;

import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.text.Position;
import org.eclipse.jface.text.source.Annotation;
import org.eclipse.jface.text.source.AnnotationModelEvent;
import org.eclipse.jface.text.source.IAnnotationModel;
import org.eclipse.ui.texteditor.MarkerAnnotation;

import com.aptana.core.logging.IdeLog;
import com.aptana.editor.php.epl.PHPEplPlugin;

/**
 * Event sent out by changes of the compilation unit annotation model.
 */
public class SourceModuleAnnotationModelEvent extends AnnotationModelEvent
{

	private boolean fIncludesProblemMarkerAnnotations;
	private IResource fUnderlyingResource;

	/**
	 * Constructor for CompilationUnitAnnotationModelEvent.
	 * 
	 * @param model
	 * @param underlyingResource
	 *            The annotation model's underlying resource
	 */
	public SourceModuleAnnotationModelEvent(IAnnotationModel model, IResource underlyingResource)
	{
		super(model);
		fUnderlyingResource = underlyingResource;
		fIncludesProblemMarkerAnnotations = false;
	}

	private void testIfProblemMarker(Annotation annotation)
	{
		if (fIncludesProblemMarkerAnnotations)
		{
			return;
		}
		if (annotation instanceof ScriptMarkerAnnotation)
		{
			fIncludesProblemMarkerAnnotations = ((ScriptMarkerAnnotation) annotation).isProblem();
		}
		else if (annotation instanceof MarkerAnnotation)
		{
			try
			{
				IMarker marker = ((MarkerAnnotation) annotation).getMarker();
				if (!marker.exists() || marker.isSubtypeOf(IMarker.PROBLEM))
				{
					fIncludesProblemMarkerAnnotations = true;
				}
			}
			catch (CoreException e)
			{
				IdeLog.logError(PHPEplPlugin.getDefault(), "Error getting a PHP error marker", e); //$NON-NLS-1$
			}
		}
	}

	/*
	 * @see org.eclipse.jface.text.source.AnnotationModelEvent#annotationAdded(org.eclipse.jface.text.source.Annotation)
	 */
	public void annotationAdded(Annotation annotation)
	{
		super.annotationAdded(annotation);
		testIfProblemMarker(annotation);
	}

	/*
	 * @see
	 * org.eclipse.jface.text.source.AnnotationModelEvent#annotationRemoved(org.eclipse.jface.text.source.Annotation)
	 */
	public void annotationRemoved(Annotation annotation)
	{
		super.annotationRemoved(annotation);
		testIfProblemMarker(annotation);
	}

	/*
	 * @see
	 * org.eclipse.jface.text.source.AnnotationModelEvent#annotationRemoved(org.eclipse.jface.text.source.Annotation,
	 * org.eclipse.jface.text.Position)
	 */
	public void annotationRemoved(Annotation annotation, Position position)
	{
		super.annotationRemoved(annotation, position);
		testIfProblemMarker(annotation);
	}

	/*
	 * @see
	 * org.eclipse.jface.text.source.AnnotationModelEvent#annotationChanged(org.eclipse.jface.text.source.Annotation)
	 */
	public void annotationChanged(Annotation annotation)
	{
		testIfProblemMarker(annotation);
		super.annotationChanged(annotation);
	}

	/**
	 * Returns whether the change included problem marker annotations.
	 * 
	 * @return <code>true</code> if the change included marker annotations
	 */
	public boolean includesProblemMarkerAnnotationChanges()
	{
		return fIncludesProblemMarkerAnnotations;
	}

	/**
	 * Returns the annotation model's underlying resource
	 */
	public IResource getUnderlyingResource()
	{
		return fUnderlyingResource;
	}

}