package com.onpositive.gae.tools.core;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.osgi.util.TextProcessor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
import org.eclipse.ui.internal.ide.misc.ContainerContentProvider;
import org.eclipse.ui.model.WorkbenchLabelProvider;
import org.eclipse.ui.part.DrillDownComposite;
/**
* Workbench-level composite for choosing a container.
*/
public class ContainerSelectionGroup extends Composite {
// The listener to notify of events
private Listener listener;
// Enable user to type in new container name
private boolean allowNewContainerName = true;
// show all projects by default
private boolean showClosedProjects = true;
// Last selection made by user
private IContainer selectedContainer;
// handle on parts
private Text containerNameField;
private IContainer initialSelection;
TreeViewer treeViewer;
// the message to display at the top of this dialog
private static final String DEFAULT_MSG_NEW_ALLOWED = IDEWorkbenchMessages.ContainerGroup_message;
private static final String DEFAULT_MSG_SELECT_ONLY = IDEWorkbenchMessages.ContainerGroup_selectFolder;
// sizing constants
private static final int SIZING_SELECTION_PANE_WIDTH = 320;
private static final int SIZING_SELECTION_PANE_HEIGHT = 300;
/**
* Creates a new instance of the widget.
*
* @param parent
* The parent widget of the group.
* @param listener
* A listener to forward events to. Can be null if no listener is
* required.
* @param allowNewContainerName
* Enable the user to type in a new container name instead of
* just selecting from the existing ones.
*/
public ContainerSelectionGroup(Composite parent, Listener listener,
boolean allowNewContainerName, IContainer initialSelection) {
this(parent, listener, allowNewContainerName, null, initialSelection);
}
/**
* Creates a new instance of the widget.
*
* @param parent
* The parent widget of the group.
* @param listener
* A listener to forward events to. Can be null if no listener is
* required.
* @param allowNewContainerName
* Enable the user to type in a new container name instead of
* just selecting from the existing ones.
* @param message
* The text to present to the user.
*/
public ContainerSelectionGroup(Composite parent, Listener listener,
boolean allowNewContainerName, String message,
IContainer initialSelection) {
this(parent, listener, allowNewContainerName, message, true,
initialSelection);
}
/**
* Creates a new instance of the widget.
*
* @param parent
* The parent widget of the group.
* @param listener
* A listener to forward events to. Can be null if no listener is
* required.
* @param allowNewContainerName
* Enable the user to type in a new container name instead of
* just selecting from the existing ones.
* @param message
* The text to present to the user.
* @param showClosedProjects
* Whether or not to show closed projects.
*/
public ContainerSelectionGroup(Composite parent, Listener listener,
boolean allowNewContainerName, String message,
boolean showClosedProjects, IContainer initialSelection) {
this(parent, listener, allowNewContainerName, message,
showClosedProjects, SIZING_SELECTION_PANE_HEIGHT,
SIZING_SELECTION_PANE_WIDTH, initialSelection);
}
/**
* Creates a new instance of the widget.
*
* @param parent
* The parent widget of the group.
* @param listener
* A listener to forward events to. Can be null if no listener is
* required.
* @param allowNewContainerName
* Enable the user to type in a new container name instead of
* just selecting from the existing ones.
* @param message
* The text to present to the user.
* @param showClosedProjects
* Whether or not to show closed projects.
* @param heightHint
* height hint for the drill down composite
* @param widthHint
* width hint for the drill down composite
*/
public ContainerSelectionGroup(Composite parent, Listener listener,
boolean allowNewContainerName, String message,
boolean showClosedProjects, int heightHint, int widthHint,
IContainer initialSelection) {
super(parent, SWT.NONE);
this.listener = listener;
this.allowNewContainerName = allowNewContainerName;
this.showClosedProjects = showClosedProjects;
this.initialSelection = initialSelection;
if (message != null) {
createContents(message, heightHint, widthHint);
} else if (allowNewContainerName) {
createContents(DEFAULT_MSG_NEW_ALLOWED, heightHint, widthHint);
} else {
createContents(DEFAULT_MSG_SELECT_ONLY, heightHint, widthHint);
}
}
/**
* The container selection has changed in the tree view. Update the
* container name field value and notify all listeners.
*
* @param container
* The container that changed
*/
public void containerSelectionChanged(IContainer container) {
selectedContainer = container;
if (allowNewContainerName) {
if (container == null) {
containerNameField.setText("");//$NON-NLS-1$
} else {
String text = TextProcessor.process(container.getFullPath()
.makeRelative().toString());
containerNameField.setText(text);
containerNameField.setToolTipText(text);
}
}
// fire an event so the parent can update its controls
if (listener != null) {
Event changeEvent = new Event();
changeEvent.type = SWT.Selection;
changeEvent.widget = this;
listener.handleEvent(changeEvent);
}
}
/**
* Creates the contents of the composite.
*
* @param message
*/
public void createContents(String message) {
createContents(message, SIZING_SELECTION_PANE_HEIGHT,
SIZING_SELECTION_PANE_WIDTH);
}
/**
* Creates the contents of the composite.
*
* @param message
* @param heightHint
* @param widthHint
*/
public void createContents(String message, int heightHint, int widthHint) {
GridLayout layout = new GridLayout();
layout.marginWidth = 0;
setLayout(layout);
setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
Label label = new Label(this, SWT.WRAP);
label.setText(message);
label.setFont(this.getFont());
if (allowNewContainerName) {
containerNameField = new Text(this, SWT.SINGLE | SWT.BORDER);
GridData gd = new GridData(GridData.FILL_HORIZONTAL);
gd.widthHint = widthHint;
containerNameField.setLayoutData(gd);
containerNameField.addListener(SWT.Modify, listener);
containerNameField.setFont(this.getFont());
} else {
// filler...
new Label(this, SWT.NONE);
}
createTreeViewer(heightHint);
Dialog.applyDialogFont(this);
}
/**
* Returns a new drill down viewer for this dialog.
*
* @param heightHint
* height hint for the drill down composite
*/
protected void createTreeViewer(int heightHint) {
// Create drill down.
DrillDownComposite drillDown = new DrillDownComposite(this, SWT.BORDER);
GridData spec = new GridData(SWT.FILL, SWT.FILL, true, true);
spec.widthHint = SIZING_SELECTION_PANE_WIDTH;
spec.heightHint = heightHint;
drillDown.setLayoutData(spec);
// Create tree viewer inside drill down.
treeViewer = new TreeViewer(drillDown, SWT.NONE);
drillDown.setChildTree(treeViewer);
ContainerContentProvider cp = new ContainerContentProvider();
cp.showClosedProjects(showClosedProjects);
treeViewer.setContentProvider(cp);
treeViewer.setLabelProvider(WorkbenchLabelProvider
.getDecoratingWorkbenchLabelProvider());
treeViewer.setComparator(new ViewerComparator());
treeViewer.setUseHashlookup(true);
treeViewer.addSelectionChangedListener(new ISelectionChangedListener() {
public void selectionChanged(SelectionChangedEvent event) {
IStructuredSelection selection = (IStructuredSelection) event
.getSelection();
containerSelectionChanged((IContainer) selection
.getFirstElement()); // allow null
}
});
treeViewer.addDoubleClickListener(new IDoubleClickListener() {
public void doubleClick(DoubleClickEvent event) {
ISelection selection = event.getSelection();
if (selection instanceof IStructuredSelection) {
Object item = ((IStructuredSelection) selection)
.getFirstElement();
if (item == null) {
return;
}
if (treeViewer.getExpandedState(item)) {
treeViewer.collapseToLevel(item, 1);
} else {
treeViewer.expandToLevel(item, 1);
}
}
}
});
// This has to be done after the viewer has been laid out
ViewerFilter vf = new ViewerFilter() {
@Override
public boolean select(Viewer viewer, Object parentElement, Object element) {
String initEl = initialSelection.getProject().getFullPath().toOSString();
if( element instanceof IContainer){
IContainer e = (IContainer)element;
boolean flg = e.getProject().getFullPath().toOSString().startsWith(initEl);
return flg;
}
return false;
}
};
treeViewer.setFilters(new ViewerFilter[]{vf});
treeViewer.setInput(ResourcesPlugin.getWorkspace());
}
/**
* Returns the currently entered container name. Null if the field is empty.
* Note that the container may not exist yet if the user entered a new
* container name in the field.
*
* @return IPath
*/
public IPath getContainerFullPath() {
if (allowNewContainerName) {
String pathName = containerNameField.getText();
if (pathName == null || pathName.length() < 1) {
return null;
}
// The user may not have made this absolute so do it for them
return (new Path(TextProcessor.deprocess(pathName))).makeAbsolute();
}
if (selectedContainer == null)
return null;
return selectedContainer.getFullPath();
}
/**
* Gives focus to one of the widgets in the group, as determined by the
* group.
*/
public void setInitialFocus() {
if (allowNewContainerName) {
containerNameField.setFocus();
} else {
treeViewer.getTree().setFocus();
}
}
/**
* Sets the selected existing container.
*
* @param container
*/
public void setSelectedContainer(IContainer container) {
selectedContainer = container;
// expand to and select the specified container
List itemsToExpand = new ArrayList();
IContainer parent = container.getParent();
while (parent != null) {
itemsToExpand.add(0, parent);
parent = parent.getParent();
}
treeViewer.setExpandedElements(itemsToExpand.toArray());
treeViewer.setSelection(new StructuredSelection(container), true);
}
}