/*
* 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.explorer;
import com.android.ide.eclipse.adt.AdtPlugin;
import com.android.ide.eclipse.adt.ui.ResourceContentProvider;
import com.android.ide.eclipse.adt.ui.ResourceLabelProvider;
import com.android.ide.eclipse.common.AndroidConstants;
import com.android.ide.eclipse.editors.resources.manager.ProjectResourceItem;
import com.android.ide.eclipse.editors.resources.manager.ProjectResources;
import com.android.ide.eclipse.editors.resources.manager.ResourceFile;
import com.android.ide.eclipse.editors.resources.manager.ResourceManager;
import com.android.ide.eclipse.editors.resources.manager.ResourceMonitor.IResourceEventListener;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.events.ControlEvent;
import org.eclipse.swt.events.ControlListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeColumn;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.ISelectionListener;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.part.ViewPart;
import java.util.Iterator;
/**
* Resource Explorer View.
* <p/>
* This contains a basic Tree view, and uses a TreeViewer to handle the data.
* <p/>
* The view listener to change in selection in the workbench, and update to show the resource
* of the project of the current selected item (either item in the package explorer, or of the
* current editor).
*
* @see ResourceContentProvider
*/
public class ResourceExplorerView extends ViewPart implements ISelectionListener,
IResourceEventListener {
// Note: keep using the obsolete AndroidConstants.EDITORS_NAMESPACE (which used
// to be the Editors Plugin ID) to keep existing preferences functional.
private final static String PREFS_COLUMN_RES =
AndroidConstants.EDITORS_NAMESPACE + "ResourceExplorer.Col1"; //$NON-NLS-1$
private final static String PREFS_COLUMN_2 =
AndroidConstants.EDITORS_NAMESPACE + "ResourceExplorer.Col2"; //$NON-NLS-1$
private Tree mTree;
private TreeViewer mTreeViewer;
private IProject mCurrentProject;
public ResourceExplorerView() {
}
@Override
public void createPartControl(Composite parent) {
mTree = new Tree(parent, SWT.SINGLE | SWT.VIRTUAL);
mTree.setLayoutData(new GridData(GridData.FILL_BOTH));
mTree.setHeaderVisible(true);
mTree.setLinesVisible(true);
final IPreferenceStore store = AdtPlugin.getDefault().getPreferenceStore();
// create 2 columns. The main one with the resources, and an "info" column.
createTreeColumn(mTree, "Resources", SWT.LEFT,
"abcdefghijklmnopqrstuvwxz", -1, PREFS_COLUMN_RES, store); //$NON-NLS-1$
createTreeColumn(mTree, "Info", SWT.LEFT,
"0123456789", -1, PREFS_COLUMN_2, store); //$NON-NLS-1$
// create the jface wrapper
mTreeViewer = new TreeViewer(mTree);
mTreeViewer.setContentProvider(new ResourceContentProvider(true /* fullLevels */));
mTreeViewer.setLabelProvider(new ResourceLabelProvider());
// listen to selection change in the workbench.
IWorkbenchPage page = getSite().getPage();
page.addSelectionListener(this);
// init with current selection
selectionChanged(getSite().getPart(), page.getSelection());
// add support for double click.
mTreeViewer.addDoubleClickListener(new IDoubleClickListener() {
public void doubleClick(DoubleClickEvent event) {
ISelection sel = event.getSelection();
if (sel instanceof IStructuredSelection) {
IStructuredSelection selection = (IStructuredSelection) sel;
if (selection.size() == 1) {
Object element = selection.getFirstElement();
// if it's a resourceFile, we directly open it.
if (element instanceof ResourceFile) {
try {
IDE.openEditor(getSite().getWorkbenchWindow().getActivePage(),
((ResourceFile)element).getFile().getIFile());
} catch (PartInitException e) {
}
} else if (element instanceof ProjectResourceItem) {
// if it's a ResourceItem, we open the first file, but only if
// there's no alternate files.
ProjectResourceItem item = (ProjectResourceItem)element;
if (item.isEditableDirectly()) {
ResourceFile[] files = item.getSourceFileArray();
if (files[0] != null) {
try {
IDE.openEditor(
getSite().getWorkbenchWindow().getActivePage(),
files[0].getFile().getIFile());
} catch (PartInitException e) {
}
}
}
}
}
}
}
});
// set up the resource manager to send us resource change notification
AdtPlugin.getDefault().getResourceMonitor().addResourceEventListener(this);
}
@Override
public void dispose() {
AdtPlugin.getDefault().getResourceMonitor().removeResourceEventListener(this);
super.dispose();
}
@Override
public void setFocus() {
mTree.setFocus();
}
/**
* Processes a new selection.
*/
public void selectionChanged(IWorkbenchPart part, ISelection selection) {
// first we test if the part is an editor.
if (part instanceof IEditorPart) {
// if it is, we check if it's a file editor.
IEditorInput input = ((IEditorPart)part).getEditorInput();
if (input instanceof IFileEditorInput) {
// from the file editor we can get the IFile object, and from it, the IProject.
IFile file = ((IFileEditorInput)input).getFile();
// get the file project
IProject project = file.getProject();
handleProjectSelection(project);
}
} else if (selection instanceof IStructuredSelection) {
// if it's not an editor, we look for structured selection.
for (Iterator<?> it = ((IStructuredSelection) selection).iterator();
it.hasNext();) {
Object element = it.next();
IProject project = null;
// if we are in the navigator or package explorer, the selection could contain a
// IResource object.
if (element instanceof IResource) {
project = ((IResource) element).getProject();
} else if (element instanceof IJavaElement) {
// if we are in the package explorer on a java element, we handle that too.
IJavaElement javaElement = (IJavaElement)element;
IJavaProject javaProject = javaElement.getJavaProject();
if (javaProject != null) {
project = javaProject.getProject();
}
} else if (element instanceof IAdaptable) {
// finally we try to get a project object from IAdaptable.
project = (IProject) ((IAdaptable) element)
.getAdapter(IProject.class);
}
// if we found a project, handle it, and return.
if (project != null) {
if (handleProjectSelection(project)) {
return;
}
}
}
}
}
/**
* Handles a project selection.
* @param project the new selected project
* @return true if the project could be processed.
*/
private boolean handleProjectSelection(IProject project) {
try {
// if it's an android project, then we get its resources, and feed them
// to the tree viewer.
if (project.hasNature(AndroidConstants.NATURE)) {
if (mCurrentProject != project) {
ProjectResources projRes = ResourceManager.getInstance().getProjectResources(
project);
if (projRes != null) {
mTreeViewer.setInput(projRes);
mCurrentProject = project;
return true;
}
}
}
} catch (CoreException e) {
}
return false;
}
/**
* Create a TreeColumn with the specified parameters. If a
* <code>PreferenceStore</code> object and a preference entry name String
* object are provided then the column will listen to change in its width
* and update the preference store accordingly.
*
* @param parent The Table parent object
* @param header The header string
* @param style The column style
* @param sample_text A sample text to figure out column width if preference
* value is missing
* @param fixedSize a fixed size. If != -1 the column is non resizable
* @param pref_name The preference entry name for column width
* @param prefs The preference store
*/
public void createTreeColumn(Tree parent, String header, int style,
String sample_text, int fixedSize, final String pref_name,
final IPreferenceStore prefs) {
// create the column
TreeColumn col = new TreeColumn(parent, style);
if (fixedSize != -1) {
col.setWidth(fixedSize);
col.setResizable(false);
} else {
// if there is no pref store or the entry is missing, we use the sample
// text and pack the column.
// Otherwise we just read the width from the prefs and apply it.
if (prefs == null || prefs.contains(pref_name) == false) {
col.setText(sample_text);
col.pack();
// init the prefs store with the current value
if (prefs != null) {
prefs.setValue(pref_name, col.getWidth());
}
} else {
col.setWidth(prefs.getInt(pref_name));
}
// if there is a pref store and a pref entry name, then we setup a
// listener to catch column resize to put the new width value into the store.
if (prefs != null && pref_name != null) {
col.addControlListener(new ControlListener() {
public void controlMoved(ControlEvent e) {
}
public void controlResized(ControlEvent e) {
// get the new width
int w = ((TreeColumn)e.widget).getWidth();
// store in pref store
prefs.setValue(pref_name, w);
}
});
}
}
// set the header
col.setText(header);
}
/**
* Processes a start in a resource event change.
*/
public void resourceChangeEventStart() {
// pass
}
/**
* Processes the end of a resource change event.
*/
public void resourceChangeEventEnd() {
try {
mTree.getDisplay().asyncExec(new Runnable() {
public void run() {
if (mTree.isDisposed() == false) {
mTreeViewer.refresh();
}
}
});
} catch (SWTException e) {
// display is disposed. nothing to do.
}
}
}
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