plugins/org.eclipse.ldt.debug.core/src/org/eclipse/ldt/debug/core/internal/LuaReplacePathSourceContainer.java

/*******************************************************************************
 * Copyright (c) 2011, 2012 Sierra Wireless 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:
 *     Sierra Wireless - initial API and implementation
 *******************************************************************************/
package org.eclipse.ldt.debug.core.internal;

import java.net.URI;
import java.net.URISyntaxException;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IStorage;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.core.sourcelookup.ISourceContainerType;
import org.eclipse.debug.core.sourcelookup.containers.AbstractSourceContainer;
import org.eclipse.dltk.core.DLTKCore;
import org.eclipse.dltk.core.IModelElement;
import org.eclipse.dltk.core.IModule;
import org.eclipse.dltk.core.IParent;
import org.eclipse.dltk.core.IProjectFragment;
import org.eclipse.dltk.core.IScriptFolder;
import org.eclipse.dltk.core.IScriptProject;
import org.eclipse.dltk.debug.core.DLTKDebugConstants;
import org.eclipse.dltk.launching.ScriptLaunchConfigurationConstants;

/**
 * A source path container which searches in a lua project buildpath
 */
public class LuaReplacePathSourceContainer extends AbstractSourceContainer {

	public LuaReplacePathSourceContainer() {
	}

	public Object[] findSourceElements(String suri) throws CoreException {
		// find project
		final ILaunchConfiguration configuration = getDirector().getLaunchConfiguration();
		String projectName;
		projectName = configuration.getAttribute(ScriptLaunchConfigurationConstants.ATTR_PROJECT_NAME, (String) null);
		if (projectName == null)
			return new Object[0];

		// find relative path from uri
		String replacePath = configuration.getAttribute(ScriptLaunchConfigurationConstants.ATTR_DLTK_DBGP_REMOTE_WORKING_DIR, (String) null);
		if (replacePath == null)
			return new Object[0];

		// find script project
		IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject(projectName);
		IScriptProject prj = DLTKCore.create(project);
		if (prj == null)
			return new Object[0];

		// remove path
		String spath = null;
		try {
			URI uri = new URI(suri);
			if (DLTKDebugConstants.FILE_SCHEME.equalsIgnoreCase(uri.getScheme())) {
				String path = uri.getPath();
				if (path != null && path.startsWith(replacePath))
					spath = path.substring(replacePath.length() + 1);
			}
		} catch (URISyntaxException e) {
			Activator.logWarning("unable to found source for " + suri, e); //$NON-NLS-1$
		}
		if (spath == null)
			return new Object[0];

		// search in all project fragment
		IProjectFragment[] allProjectFragments = prj.getAllProjectFragments();
		IPath path = new Path(spath);
		for (IProjectFragment projectFragment : allProjectFragments) {
			Object result = searchInIParent(projectFragment, path);
			if (result != null)
				return new Object[] { result };
		}
		return new Object[0];
	}

	private Object searchInIParent(IParent parent, IPath path) throws CoreException {
		if (path.segmentCount() > 1) {
			// search scriptfolder
			String firstSegment = path.segment(0);
			IModelElement[] children = parent.getChildren();
			for (IModelElement child : children) {
				if (child instanceof IScriptFolder) {
					if (firstSegment.equals(child.getElementName())) {
						IPath cleanpath = path.removeFirstSegments(1);
						Object result = searchInIParent((IScriptFolder) child, cleanpath);
						if (result != null)
							return result;
					}
				}
			}
		} else if (path.segmentCount() == 1) {
			// search module
			String firstSegment = path.segment(0);
			IModelElement[] children = parent.getChildren();
			for (IModelElement child : children) {
				if (child instanceof IScriptFolder) {
					IScriptFolder scriptFolder = (IScriptFolder) child;
					if (scriptFolder.isRootFolder()) {
						Object result = searchInIParent((IScriptFolder) child, path);
						if (result != null)
							return result;
					}
				} else if (child instanceof IModule) {
					if (firstSegment.equals(child.getElementName())) {
						if (child.getResource() != null)
							return child.getResource();
						else if (child instanceof IStorage)
							return child;
					}
				}
			}
		}
		return null;
	}

	/**
	 * @see org.eclipse.debug.core.sourcelookup.ISourceContainer#getName()
	 */
	@Override
	public String getName() {
		return "Lua Replace Path Buildpath Source Container"; //$NON-NLS-1$
	}

	/**
	 * @see org.eclipse.debug.core.sourcelookup.ISourceContainer#getType()
	 */
	@Override
	public ISourceContainerType getType() {
		return null;
	}
}