/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Eclipse Public License, Version 1.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.eclipse.org/org/documents/epl-v10.php
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.ide.eclipse.editors.resources.manager;
import com.android.ide.eclipse.common.project.BaseProjectHelper;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IMarkerDelta;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceChangeEvent;
import org.eclipse.core.resources.IResourceChangeListener;
import org.eclipse.core.resources.IResourceDelta;
import org.eclipse.core.resources.IResourceDeltaVisitor;
import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jdt.core.IJavaModel;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import java.util.ArrayList;
/**
* Resource Monitor for the whole editor plugin. Other, more simple, listeners can register to
* that one.
*/
public class ResourceMonitor implements IResourceChangeListener {
private final static ResourceMonitor sThis = new ResourceMonitor();
/**
* Classes which implement this interface provide a method that deals
* with file change events.
*/
public interface IFileListener {
/**
* Sent when a file changed.
* @param file The file that changed.
* @param markerDeltas The marker deltas for the file.
* @param kind The change kind. This is equivalent to
* {@link IResourceDelta#accept(IResourceDeltaVisitor)}
*/
public void fileChanged(IFile file, IMarkerDelta[] markerDeltas, int kind);
}
/**
* Classes which implements this interface provide methods dealing with project events.
*/
public interface IProjectListener {
/**
* Sent for each opened android project at the time the listener is put in place.
* @param project the opened project.
*/
public void projectOpenedWithWorkspace(IProject project);
/**
* Sent when a project is opened.
* @param project the project being opened.
*/
public void projectOpened(IProject project);
/**
* Sent when a project is closed.
* @param project the project being closed.
*/
public void projectClosed(IProject project);
/**
* Sent when a project is deleted.
* @param project the project about to be deleted.
*/
public void projectDeleted(IProject project);
}
/**
* Classes which implement this interface provide a method that deals
* with folder change events
*/
public interface IFolderListener {
/**
* Sent when a folder changed.
* @param folder The file that was changed
* @param kind The change kind. This is equivalent to {@link IResourceDelta#getKind()}
*/
public void folderChanged(IFolder folder, int kind);
}
/**
* Interface for a listener to be notified when resource change event starts and ends.
*/
public interface IResourceEventListener {
public void resourceChangeEventStart();
public void resourceChangeEventEnd();
}
/**
* Base listener bundle to associate a listener to an event mask.
*/
private static class ListenerBundle {
/** Mask value to accept all events */
public final static int MASK_NONE = -1;
/**
* Event mask. Values accepted are IResourceDelta.###
* @see IResourceDelta#ADDED
* @see IResourceDelta#REMOVED
* @see IResourceDelta#CHANGED
* @see IResourceDelta#ADDED_PHANTOM
* @see IResourceDelta#REMOVED_PHANTOM
* */
int kindMask;
}
/**
* Listener bundle for file event.
*/
private static class FileListenerBundle extends ListenerBundle {
/** The file listener */
IFileListener listener;
}
/**
* Listener bundle for folder event.
*/
private static class FolderListenerBundle extends ListenerBundle {
/** The file listener */
IFolderListener listener;
}
private final ArrayList<FileListenerBundle> mFileListeners =
new ArrayList<FileListenerBundle>();
private final ArrayList<FolderListenerBundle> mFolderListeners =
new ArrayList<FolderListenerBundle>();
private final ArrayList<IProjectListener> mProjectListeners = new ArrayList<IProjectListener>();
private final ArrayList<IResourceEventListener> mEventListeners =
new ArrayList<IResourceEventListener>();
private IWorkspace mWorkspace;
/**
* Delta visitor for resource changes.
*/
private final class DeltaVisitor implements IResourceDeltaVisitor {
public boolean visit(IResourceDelta delta) {
IResource r = delta.getResource();
int type = r.getType();
if (type == IResource.FILE) {
int kind = delta.getKind();
// notify the listeners.
for (FileListenerBundle bundle : mFileListeners) {
if (bundle.kindMask == ListenerBundle.MASK_NONE
|| (bundle.kindMask & kind) != 0) {
bundle.listener.fileChanged((IFile)r, delta.getMarkerDeltas(), kind);
}
}
return false;
} else if (type == IResource.FOLDER) {
int kind = delta.getKind();
// notify the listeners.
for (FolderListenerBundle bundle : mFolderListeners) {
if (bundle.kindMask == ListenerBundle.MASK_NONE
|| (bundle.kindMask & kind) != 0) {
bundle.listener.folderChanged((IFolder)r, kind);
}
}
return true;
} else if (type == IResource.PROJECT) {
int flags = delta.getFlags();
if (flags == IResourceDelta.OPEN) {
// the project is opening or closing.
IProject project = (IProject)r;
if (project.isOpen()) {
// notify the listeners.
for (IProjectListener pl : mProjectListeners) {
pl.projectOpened(project);
}
} else {
// notify the listeners.
for (IProjectListener pl : mProjectListeners) {
pl.projectClosed(project);
}
}
}
}
return true;
}
}
public static ResourceMonitor getMonitor() {
return sThis;
}
/**
* Starts the resource monitoring.
* @param ws The current workspace.
* @return The monitor object.
*/
public static ResourceMonitor startMonitoring(IWorkspace ws) {
if (sThis != null) {
ws.addResourceChangeListener(sThis,
IResourceChangeEvent.POST_CHANGE | IResourceChangeEvent.PRE_DELETE);
sThis.mWorkspace = ws;
}
return sThis;
}
/**
* Stops the resource monitoring.
* @param ws The current workspace.
*/
public static void stopMonitoring(IWorkspace ws) {
if (sThis != null) {
ws.removeResourceChangeListener(sThis);
sThis.mFileListeners.clear();
sThis.mProjectListeners.clear();
}
}
/**
* Adds a file listener.
* @param listener The listener to receive the events.
* @param kindMask The event mask to filter out specific events.
* {@link ListenerBundle#MASK_NONE} will forward all events.
*/
public synchronized void addFileListener(IFileListener listener, int kindMask) {
FileListenerBundle bundle = new FileListenerBundle();
bundle.listener = listener;
bundle.kindMask = kindMask;
mFileListeners.add(bundle);
}
/**
* Removes an existing file listener.
* @param listener the listener to remove.
*/
public synchronized void removeFileListener(IFileListener listener) {
for (int i = 0 ; i < mFileListeners.size() ; i++) {
FileListenerBundle bundle = mFileListeners.get(i);
if (bundle.listener == listener) {
mFileListeners.remove(i);
return;
}
}
}
/**
* Adds a folder listener.
* @param listener The listener to receive the events.
* @param kindMask The event mask to filter out specific events.
* {@link ListenerBundle#MASK_NONE} will forward all events.
*/
public synchronized void addFolderListener(IFolderListener listener, int kindMask) {
FolderListenerBundle bundle = new FolderListenerBundle();
bundle.listener = listener;
bundle.kindMask = kindMask;
mFolderListeners.add(bundle);
}
/**
* Removes an existing folder listener.
* @param listener the listener to remove.
*/
public synchronized void removeFolderListener(IFolderListener listener) {
for (int i = 0 ; i < mFolderListeners.size() ; i++) {
FolderListenerBundle bundle = mFolderListeners.get(i);
if (bundle.listener == listener) {
mFolderListeners.remove(i);
return;
}
}
}
/**
* Adds a project listener.
* @param listener The listener to receive the events.
*/
public synchronized void addProjectListener(IProjectListener listener) {
mProjectListeners.add(listener);
// we need to look at the opened projects and give them to the listener.
// get the list of opened android projects.
IWorkspaceRoot workspaceRoot = mWorkspace.getRoot();
IJavaModel javaModel = JavaCore.create(workspaceRoot);
IJavaProject[] androidProjects = BaseProjectHelper.getAndroidProjects(javaModel);
for (IJavaProject androidProject : androidProjects) {
listener.projectOpenedWithWorkspace(androidProject.getProject());
}
}
/**
* Removes an existing project listener.
* @param listener the listener to remove.
*/
public synchronized void removeProjectListener(IProjectListener listener) {
mProjectListeners.remove(listener);
}
/**
* Adds a resource event listener.
* @param listener The listener to receive the events.
*/
public synchronized void addResourceEventListener(IResourceEventListener listener) {
mEventListeners.add(listener);
}
/**
* Removes an existing Resource Event listener.
* @param listener the listener to remove.
*/
public synchronized void removeResourceEventListener(IResourceEventListener listener) {
mEventListeners.remove(listener);
}
/**
* Processes the workspace resource change events.
*/
public void resourceChanged(IResourceChangeEvent event) {
// notify the event listeners of a start.
for (IResourceEventListener listener : mEventListeners) {
listener.resourceChangeEventStart();
}
if (event.getType() == IResourceChangeEvent.PRE_DELETE) {
// a project is being deleted. Lets get the project object and remove
// its compiled resource list.
IResource r = event.getResource();
IProject project = r.getProject();
// notify the listeners.
for (IProjectListener pl : mProjectListeners) {
pl.projectDeleted(project);
}
} else {
// this a regular resource change. We get the delta and go through it with a visitor.
IResourceDelta delta = event.getDelta();
DeltaVisitor visitor = new DeltaVisitor();
try {
delta.accept(visitor);
} catch (CoreException e) {
}
}
// we're done, notify the event listeners.
for (IResourceEventListener listener : mEventListeners) {
listener.resourceChangeEventEnd();
}
}
}
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