bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/EditorSashContainer.java - platform/eclipse.platform.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2003 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal;


 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;

 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.dnd.DND;
 import org.eclipse.swt.dnd.DropTarget;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.ui.IMemento;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.presentations.StackPresentation;

 /**
  * Represents the area set aside for editor workbooks.
  * This container only accepts EditorStack and PartSash
  * as layout parts.
  *
  * Note no views are allowed within this container.
  */
 public class EditorSashContainer extends PartSashContainer {

 	private static final String DEFAULT_WORKBOOK_ID = "DefaultEditorWorkbook";//$NON-NLS-1$
 	private ArrayList editorWorkbooks = new ArrayList(3);
 	private EditorStack activeEditorWorkbook;
 	private DropTarget dropTarget;
 	private WorkbenchPage page;

 public EditorSashContainer(String editorId, WorkbenchPage page) {
 	super(editorId,page);

 	//this.partDropListener = listener;
 	this.page = page;
 	createDefaultWorkbook();
 }
 /**
  * Add an editor to the active workbook.
  */
 public void addEditor(EditorPane pane) {
 	EditorStack workbook = getActiveWorkbook();
 	workbook.add(pane);
 }
 /**
  * Notification that a child layout part has been
  * added to the container. Subclasses may override
  * this method to perform any container specific
  * work.
  */
 protected void childAdded(LayoutPart child) {
 	if (child instanceof EditorStack)
 		editorWorkbooks.add(child);
 }
 /**
  * Notification that a child layout part has been
  * removed from the container. Subclasses may override
  * this method to perform any container specific
  * work.
  */
 protected void childRemoved(LayoutPart child) {
 	if (child instanceof EditorStack) {
 		editorWorkbooks.remove(child);
 		if (activeEditorWorkbook == child)
 			setActiveWorkbook(null, false);
 	}
 }
 protected EditorStack createDefaultWorkbook() {
 	EditorStack newWorkbook = EditorStack.newEditorWorkbook(this, page);
 	newWorkbook.setID(DEFAULT_WORKBOOK_ID);
 	add(newWorkbook);
 	return newWorkbook;
 }
 /**
  * Subclasses override this method to specify
  * the composite to use to parent all children
  * layout parts it contains.
  */
 protected Composite createParent(Composite parentWidget) {
 	return new Composite(parentWidget, SWT.NONE);
 }
 /**
  * Dispose of the editor area.
  */
 public void dispose() {
 	// Free editor workbooks.
 	Iterator iter = editorWorkbooks.iterator();
 	while (iter.hasNext()) {
 		EditorStack wb = (EditorStack)iter.next();
 		wb.dispose();
 	}
 	editorWorkbooks.clear();

 	// Free rest.
 	super.dispose();
 }
 /**
  * Subclasses override this method to dispose
  * of any swt resources created during createParent.
  */
 protected void disposeParent() {
 	this.parent.dispose();
 }
 /**
  * Return the editor workbook which is active.
  */
 public EditorStack getActiveWorkbook() {
 	if (activeEditorWorkbook == null) {
 		if (editorWorkbooks.size() < 1)
 			setActiveWorkbook(createDefaultWorkbook(), false);
 		else
 			setActiveWorkbook((EditorStack)editorWorkbooks.get(0), false);
 	}

 	return activeEditorWorkbook;
 }
 /**
  * Return the editor workbook id which is active.
  */
 public String getActiveWorkbookID() {
 	return getActiveWorkbook().getID();
 }
 /**
  * Return the all the editor workbooks.
  */
 public ArrayList getEditorWorkbooks() {
 	return (ArrayList)editorWorkbooks.clone();
 }
 /**
  * Return the all the editor workbooks.
  */
 public int getEditorWorkbookCount() {
 	return editorWorkbooks.size();
 }
 /**
  * Return true is the workbook specified
  * is the active one.
  */
 protected boolean isActiveWorkbook(EditorStack workbook) {
 	return activeEditorWorkbook == workbook;
 }
 /**
  * Find the sashs around the specified part.
  */
 public void findSashes(LayoutPart pane,PartPane.Sashes sashes) {
 	//Find the sashes around the current editor and
 	//then the sashes around the editor area.
 	super.findSashes(pane,sashes);

 	ILayoutContainer container = getContainer();
 	if (container != null) {
 		container.findSashes(this,sashes);
 	}
 }
 /**
  * Remove all the editors
  */
 public void removeAllEditors() {
 	EditorStack currentWorkbook = getActiveWorkbook();

 	// Iterate over a copy so the original can be modified.
 	Iterator workbooks = ((ArrayList)editorWorkbooks.clone()).iterator();
 	while (workbooks.hasNext()) {
 		EditorStack workbook = (EditorStack)workbooks.next();
 		workbook.removeAll();
 		if (workbook != currentWorkbook) {
 			remove(workbook);
 			workbook.dispose();
 		}
 	}
 }
 /**
  * Remove an editor from its' workbook.
  */
 public void removeEditor(EditorPane pane) {
 	EditorStack workbook = pane.getWorkbook();
 	if (workbook == null)
 		return;
 	workbook.remove(pane);

 	// remove the editor workbook if empty
 	if (workbook.getItemCount() < 1 /* && editorWorkbooks.size() > 1*/) {
 		remove(workbook);
 		workbook.dispose();
 	}
 }
 /**
  * @see IPersistablePart
  */
 public IStatus restoreState(IMemento memento) {
 	// Remove the default editor workbook that is
 	// initialy created with the editor area.
 	if (children != null) {
 		EditorStack defaultWorkbook = null;
 		for (int i = 0; i < children.size(); i++) {
 			LayoutPart child = (LayoutPart)children.get(i);
 			if (child.getID() == DEFAULT_WORKBOOK_ID) {
 				defaultWorkbook = (EditorStack)child;
 				if (defaultWorkbook.getItemCount() > 0)
 					defaultWorkbook = null;
 			}
 		}
 		if (defaultWorkbook != null)
 			remove(defaultWorkbook);
 	}

 	// Restore the relationship/layout
 	IMemento [] infos = memento.getChildren(IWorkbenchConstants.TAG_INFO);
 	Map mapIDtoPart = new HashMap(infos.length);

 	for (int i = 0; i < infos.length; i ++) {
 		// Get the info details.
 		IMemento childMem = infos[i];
 		String partID = childMem.getString(IWorkbenchConstants.TAG_PART);
 		String relativeID = childMem.getString(IWorkbenchConstants.TAG_RELATIVE);
 		int relationship = 0;
 		int left = 0, right = 0;
 		float ratio = 0.5f;
 		if (relativeID != null) {
 			relationship = childMem.getInteger(IWorkbenchConstants.TAG_RELATIONSHIP).intValue();
 			Float ratioFloat = childMem.getFloat(IWorkbenchConstants.TAG_RATIO);
 			Integer leftInt = childMem.getInteger(IWorkbenchConstants.TAG_RATIO_LEFT);
 			Integer rightInt = childMem.getInteger(IWorkbenchConstants.TAG_RATIO_RIGHT);
 			if (leftInt != null && rightInt != null) {
 				left = leftInt.intValue();
 				right = rightInt.intValue();
 			} else if (ratioFloat != null) {
 				ratio = ratioFloat.floatValue();
 			}
 		}

 		// Create the part.
 		EditorStack workbook = EditorStack.newEditorWorkbook(this, page);
 		workbook.setID(partID);
 		// 1FUN70C: ITPUI:WIN - Shouldn't set Container when not active
 		workbook.setContainer(this);

 		// Add the part to the layout
 		if (relativeID == null) {
 			add(workbook);
 		} else {
 			LayoutPart refPart = (LayoutPart)mapIDtoPart.get(relativeID);
 			if (refPart != null) {
 				//$TODO pass in left and right
 				if (left == 0 || right == 0)
 					add(workbook, relationship, ratio, refPart);
 				else
 					add(workbook, relationship, left, right, refPart);
 			} else {
 				WorkbenchPlugin.log("Unable to find part for ID: " + relativeID);//$NON-NLS-1$
 			}
 		}
 		mapIDtoPart.put(partID, workbook);
 	}
 	return new Status(IStatus.OK,PlatformUI.PLUGIN_ID,0,"",null); //$NON-NLS-1$
 }
 /**
  * @see IPersistablePart
  */
 public IStatus saveState(IMemento memento) {
 	RelationshipInfo[] relationships = computeRelation();
 	for (int i = 0; i < relationships.length; i ++) {
 		// Save the relationship info ..
 		//		private LayoutPart part;
 		// 		private int relationship;
 		// 		private float ratio;
 		// 		private LayoutPart relative;
 		RelationshipInfo info = relationships[i];
 		IMemento childMem = memento.createChild(IWorkbenchConstants.TAG_INFO);
 		childMem.putString(IWorkbenchConstants.TAG_PART, info.part.getID());
 		if (info.relative != null) {
 			childMem.putString(IWorkbenchConstants.TAG_RELATIVE, info.relative.getID());
 			childMem.putInteger(IWorkbenchConstants.TAG_RELATIONSHIP, info.relationship);
 			childMem.putInteger(IWorkbenchConstants.TAG_RATIO_LEFT, info.left);
 			childMem.putInteger(IWorkbenchConstants.TAG_RATIO_RIGHT, info.right);
 			// Note: "ratio" is not used in newer versions of Eclipse, which use "left"
 			// and "right" (above) instead
 			childMem.putFloat(IWorkbenchConstants.TAG_RATIO, info.getRatio());
 		}
 	}
 	return new Status(IStatus.OK,PlatformUI.PLUGIN_ID,0,"",null); //$NON-NLS-1$
 }
 /**
  * Set the editor workbook which is active.
  */
 public void setActiveWorkbook(EditorStack newWorkbook, boolean hasFocus) {
 	EditorStack oldWorkbook = activeEditorWorkbook;
 	activeEditorWorkbook = newWorkbook;

 	if (oldWorkbook != null && oldWorkbook != newWorkbook) {
 		oldWorkbook.setActive(StackPresentation.AS_INACTIVE);
 	}

 	if (newWorkbook != null) {
 		if (hasFocus) {
 			newWorkbook.setActive(StackPresentation.AS_ACTIVE_FOCUS);
 		} else {
 			newWorkbook.setActive(StackPresentation.AS_ACTIVE_NOFOCUS);
 		}
 	}

 	updateTabList();
 }
 /**
  * Set the editor workbook which is active.
  */
 public void setActiveWorkbookFromID(String id) {
 	for (int i = 0; i < editorWorkbooks.size(); i++) {
 		EditorStack workbook = (EditorStack) editorWorkbooks.get(i);
 		if (workbook.getID().equals(id))
 			setActiveWorkbook(workbook, false);
 	}
 }

 /**
  * Updates the editor area's tab list to include the active
  * editor and its tab.
  */
 public void updateTabList() {
 	Composite parent = getParent();
 	if (parent != null) {  // parent may be null on startup
 		EditorStack wb = getActiveWorkbook();
 		if (wb == null) {
 			parent.setTabList(new Control[0]);
 		}
 		else {
 			parent.setTabList(wb.getTabList());
 		}
 	}
 }


 	/**
 	 * @see org.eclipse.ui.internal.LayoutPart#createControl(org.eclipse.swt.widgets.Composite)
 	 */
 	public void createControl(Composite parent) {
 		super.createControl(parent);

 		//let the user drop files/editor input on the editor area
 		addDropSupport();
 	}
 	private void addDropSupport() {
 		if (dropTarget == null) {
 			WorkbenchWindowConfigurer winConfigurer = ((WorkbenchWindow) page.getWorkbenchWindow()).getWindowConfigurer();

 			dropTarget = new DropTarget(getControl(), DND.DROP_DEFAULT | DND.DROP_COPY);
 			dropTarget.setTransfer(winConfigurer.getTransfers());
 			if (winConfigurer.getDropTargetListener() != null) {
 				dropTarget.addDropListener(winConfigurer.getDropTargetListener());
 			}
 		}
 	}

 	/* package */ DropTarget getDropTarget() {
 		return dropTarget;
 	}
 	/**
 	 * @see org.eclipse.ui.internal.LayoutPart#getImportance()
 	 */
 	public boolean isCompressible() {
 		//Added for bug 19524
 		return true;
 	}
 	/* (non-Javadoc)
 	 * @see org.eclipse.ui.internal.ILayoutContainer#allowsAutoFocus()
 	 */
 	public boolean allowsAutoFocus() {
 		return true;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.ui.internal.PartSashContainer#isStackType(org.eclipse.ui.internal.LayoutPart)
 	 */
 	public boolean isStackType(LayoutPart toTest) {
 		return (toTest instanceof EditorStack);
 	}
 	/* (non-Javadoc)
 	 * @see org.eclipse.ui.internal.PartSashContainer#isPaneType(org.eclipse.ui.internal.LayoutPart)
 	 */
 	public boolean isPaneType(LayoutPart toTest) {
 		return (toTest instanceof EditorPane);
 	}
 	/* (non-Javadoc)
 	 * @see org.eclipse.ui.internal.PartSashContainer#createStack(org.eclipse.ui.internal.LayoutPart)
 	 */
 	protected PartStack createStack() {
 		EditorStack newWorkbook = EditorStack.newEditorWorkbook(this, page);

 		return newWorkbook;
 	}
 	/* (non-Javadoc)
 	 * @see org.eclipse.ui.internal.PartSashContainer#setVisiblePart(org.eclipse.ui.internal.ILayoutContainer, org.eclipse.ui.internal.LayoutPart)
 	 */
 	protected void setVisiblePart(ILayoutContainer container, LayoutPart visiblePart) {
 		EditorStack refPart = (EditorStack)container;

 		refPart.becomeActiveWorkbook(true);
 		refPart.setVisibleEditor((EditorPane)visiblePart);
 	}
 	/* (non-Javadoc)
 	 * @see org.eclipse.ui.internal.PartSashContainer#getVisiblePart(org.eclipse.ui.internal.ILayoutContainer)
 	 */
 	protected LayoutPart getVisiblePart(ILayoutContainer container) {
 		EditorStack refPart = (EditorStack)container;

 		return refPart.getVisibleEditor();
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2000, 2003 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.ui.internal;


	import java.util.ArrayList;
	import java.util.HashMap;
	import java.util.Iterator;
	import java.util.Map;

	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.dnd.DND;
	import org.eclipse.swt.dnd.DropTarget;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.ui.IMemento;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.presentations.StackPresentation;

	/**
	* Represents the area set aside for editor workbooks.
	* This container only accepts EditorStack and PartSash
	* as layout parts.
	*
	* Note no views are allowed within this container.
	*/
	public class EditorSashContainer extends PartSashContainer {

	private static final String DEFAULT_WORKBOOK_ID = "DefaultEditorWorkbook";//$NON-NLS-1$
	private ArrayList editorWorkbooks = new ArrayList(3);
	private EditorStack activeEditorWorkbook;
	private DropTarget dropTarget;
	private WorkbenchPage page;

	public EditorSashContainer(String editorId, WorkbenchPage page) {
	super(editorId,page);

	//this.partDropListener = listener;
	this.page = page;
	createDefaultWorkbook();
	}
	/**
	* Add an editor to the active workbook.
	*/
	public void addEditor(EditorPane pane) {
	EditorStack workbook = getActiveWorkbook();
	workbook.add(pane);
	}
	/**
	* Notification that a child layout part has been
	* added to the container. Subclasses may override
	* this method to perform any container specific
	* work.
	*/
	protected void childAdded(LayoutPart child) {
	if (child instanceof EditorStack)
	editorWorkbooks.add(child);
	}
	/**
	* Notification that a child layout part has been
	* removed from the container. Subclasses may override
	* this method to perform any container specific
	* work.
	*/
	protected void childRemoved(LayoutPart child) {
	if (child instanceof EditorStack) {
	editorWorkbooks.remove(child);
	if (activeEditorWorkbook == child)
	setActiveWorkbook(null, false);
	}
	}
	protected EditorStack createDefaultWorkbook() {
	EditorStack newWorkbook = EditorStack.newEditorWorkbook(this, page);
	newWorkbook.setID(DEFAULT_WORKBOOK_ID);
	add(newWorkbook);
	return newWorkbook;
	}
	/**
	* Subclasses override this method to specify
	* the composite to use to parent all children
	* layout parts it contains.
	*/
	protected Composite createParent(Composite parentWidget) {
	return new Composite(parentWidget, SWT.NONE);
	}
	/**
	* Dispose of the editor area.
	*/
	public void dispose() {
	// Free editor workbooks.
	Iterator iter = editorWorkbooks.iterator();
	while (iter.hasNext()) {
	EditorStack wb = (EditorStack)iter.next();
	wb.dispose();
	}
	editorWorkbooks.clear();

	// Free rest.
	super.dispose();
	}
	/**
	* Subclasses override this method to dispose
	* of any swt resources created during createParent.
	*/
	protected void disposeParent() {
	this.parent.dispose();
	}
	/**
	* Return the editor workbook which is active.
	*/
	public EditorStack getActiveWorkbook() {
	if (activeEditorWorkbook == null) {
	if (editorWorkbooks.size() < 1)
	setActiveWorkbook(createDefaultWorkbook(), false);
	else
	setActiveWorkbook((EditorStack)editorWorkbooks.get(0), false);
	}

	return activeEditorWorkbook;
	}
	/**
	* Return the editor workbook id which is active.
	*/
	public String getActiveWorkbookID() {
	return getActiveWorkbook().getID();
	}
	/**
	* Return the all the editor workbooks.
	*/
	public ArrayList getEditorWorkbooks() {
	return (ArrayList)editorWorkbooks.clone();
	}
	/**
	* Return the all the editor workbooks.
	*/
	public int getEditorWorkbookCount() {
	return editorWorkbooks.size();
	}
	/**
	* Return true is the workbook specified
	* is the active one.
	*/
	protected boolean isActiveWorkbook(EditorStack workbook) {
	return activeEditorWorkbook == workbook;
	}
	/**
	* Find the sashs around the specified part.
	*/
	public void findSashes(LayoutPart pane,PartPane.Sashes sashes) {
	//Find the sashes around the current editor and
	//then the sashes around the editor area.
	super.findSashes(pane,sashes);

	ILayoutContainer container = getContainer();
	if (container != null) {
	container.findSashes(this,sashes);
	}
	}
	/**
	* Remove all the editors
	*/
	public void removeAllEditors() {
	EditorStack currentWorkbook = getActiveWorkbook();

	// Iterate over a copy so the original can be modified.
	Iterator workbooks = ((ArrayList)editorWorkbooks.clone()).iterator();
	while (workbooks.hasNext()) {
	EditorStack workbook = (EditorStack)workbooks.next();
	workbook.removeAll();
	if (workbook != currentWorkbook) {
	remove(workbook);
	workbook.dispose();
	}
	}
	}
	/**
	* Remove an editor from its' workbook.
	*/
	public void removeEditor(EditorPane pane) {
	EditorStack workbook = pane.getWorkbook();
	if (workbook == null)
	return;
	workbook.remove(pane);

	// remove the editor workbook if empty
	if (workbook.getItemCount() < 1 /* && editorWorkbooks.size() > 1*/) {
	remove(workbook);
	workbook.dispose();
	}
	}
	/**
	* @see IPersistablePart
	*/
	public IStatus restoreState(IMemento memento) {
	// Remove the default editor workbook that is
	// initialy created with the editor area.
	if (children != null) {
	EditorStack defaultWorkbook = null;
	for (int i = 0; i < children.size(); i++) {
	LayoutPart child = (LayoutPart)children.get(i);
	if (child.getID() == DEFAULT_WORKBOOK_ID) {
	defaultWorkbook = (EditorStack)child;
	if (defaultWorkbook.getItemCount() > 0)
	defaultWorkbook = null;
	}
	}
	if (defaultWorkbook != null)
	remove(defaultWorkbook);
	}

	// Restore the relationship/layout
	IMemento [] infos = memento.getChildren(IWorkbenchConstants.TAG_INFO);
	Map mapIDtoPart = new HashMap(infos.length);

	for (int i = 0; i < infos.length; i ++) {
	// Get the info details.
	IMemento childMem = infos[i];
	String partID = childMem.getString(IWorkbenchConstants.TAG_PART);
	String relativeID = childMem.getString(IWorkbenchConstants.TAG_RELATIVE);
	int relationship = 0;
	int left = 0, right = 0;
	float ratio = 0.5f;
	if (relativeID != null) {
	relationship = childMem.getInteger(IWorkbenchConstants.TAG_RELATIONSHIP).intValue();
	Float ratioFloat = childMem.getFloat(IWorkbenchConstants.TAG_RATIO);
	Integer leftInt = childMem.getInteger(IWorkbenchConstants.TAG_RATIO_LEFT);
	Integer rightInt = childMem.getInteger(IWorkbenchConstants.TAG_RATIO_RIGHT);
	if (leftInt != null && rightInt != null) {
	left = leftInt.intValue();
	right = rightInt.intValue();
	} else if (ratioFloat != null) {
	ratio = ratioFloat.floatValue();
	}
	}

	// Create the part.
	EditorStack workbook = EditorStack.newEditorWorkbook(this, page);
	workbook.setID(partID);
	// 1FUN70C: ITPUI:WIN - Shouldn't set Container when not active
	workbook.setContainer(this);

	// Add the part to the layout
	if (relativeID == null) {
	add(workbook);
	} else {
	LayoutPart refPart = (LayoutPart)mapIDtoPart.get(relativeID);
	if (refPart != null) {
	//$TODO pass in left and right
	if (left == 0 \|\| right == 0)
	add(workbook, relationship, ratio, refPart);
	else
	add(workbook, relationship, left, right, refPart);
	} else {
	WorkbenchPlugin.log("Unable to find part for ID: " + relativeID);//$NON-NLS-1$
	}
	}
	mapIDtoPart.put(partID, workbook);
	}
	return new Status(IStatus.OK,PlatformUI.PLUGIN_ID,0,"",null); //$NON-NLS-1$
	}
	/**
	* @see IPersistablePart
	*/
	public IStatus saveState(IMemento memento) {
	RelationshipInfo[] relationships = computeRelation();
	for (int i = 0; i < relationships.length; i ++) {
	// Save the relationship info ..
	// private LayoutPart part;
	// private int relationship;
	// private float ratio;
	// private LayoutPart relative;
	RelationshipInfo info = relationships[i];
	IMemento childMem = memento.createChild(IWorkbenchConstants.TAG_INFO);
	childMem.putString(IWorkbenchConstants.TAG_PART, info.part.getID());
	if (info.relative != null) {
	childMem.putString(IWorkbenchConstants.TAG_RELATIVE, info.relative.getID());
	childMem.putInteger(IWorkbenchConstants.TAG_RELATIONSHIP, info.relationship);
	childMem.putInteger(IWorkbenchConstants.TAG_RATIO_LEFT, info.left);
	childMem.putInteger(IWorkbenchConstants.TAG_RATIO_RIGHT, info.right);
	// Note: "ratio" is not used in newer versions of Eclipse, which use "left"
	// and "right" (above) instead
	childMem.putFloat(IWorkbenchConstants.TAG_RATIO, info.getRatio());
	}
	}
	return new Status(IStatus.OK,PlatformUI.PLUGIN_ID,0,"",null); //$NON-NLS-1$
	}
	/**
	* Set the editor workbook which is active.
	*/
	public void setActiveWorkbook(EditorStack newWorkbook, boolean hasFocus) {
	EditorStack oldWorkbook = activeEditorWorkbook;
	activeEditorWorkbook = newWorkbook;

	if (oldWorkbook != null && oldWorkbook != newWorkbook) {
	oldWorkbook.setActive(StackPresentation.AS_INACTIVE);
	}

	if (newWorkbook != null) {
	if (hasFocus) {
	newWorkbook.setActive(StackPresentation.AS_ACTIVE_FOCUS);
	} else {
	newWorkbook.setActive(StackPresentation.AS_ACTIVE_NOFOCUS);
	}
	}

	updateTabList();
	}
	/**
	* Set the editor workbook which is active.
	*/
	public void setActiveWorkbookFromID(String id) {
	for (int i = 0; i < editorWorkbooks.size(); i++) {
	EditorStack workbook = (EditorStack) editorWorkbooks.get(i);
	if (workbook.getID().equals(id))
	setActiveWorkbook(workbook, false);
	}
	}

	/**
	* Updates the editor area's tab list to include the active
	* editor and its tab.
	*/
	public void updateTabList() {
	Composite parent = getParent();
	if (parent != null) { // parent may be null on startup
	EditorStack wb = getActiveWorkbook();
	if (wb == null) {
	parent.setTabList(new Control[0]);
	}
	else {
	parent.setTabList(wb.getTabList());
	}
	}
	}


	/**
	* @see org.eclipse.ui.internal.LayoutPart#createControl(org.eclipse.swt.widgets.Composite)
	*/
	public void createControl(Composite parent) {
	super.createControl(parent);

	//let the user drop files/editor input on the editor area
	addDropSupport();
	}
	private void addDropSupport() {
	if (dropTarget == null) {
	WorkbenchWindowConfigurer winConfigurer = ((WorkbenchWindow) page.getWorkbenchWindow()).getWindowConfigurer();

	dropTarget = new DropTarget(getControl(), DND.DROP_DEFAULT \| DND.DROP_COPY);
	dropTarget.setTransfer(winConfigurer.getTransfers());
	if (winConfigurer.getDropTargetListener() != null) {
	dropTarget.addDropListener(winConfigurer.getDropTargetListener());
	}
	}
	}

	/* package */ DropTarget getDropTarget() {
	return dropTarget;
	}
	/**
	* @see org.eclipse.ui.internal.LayoutPart#getImportance()
	*/
	public boolean isCompressible() {
	//Added for bug 19524
	return true;
	}
	/* (non-Javadoc)
	* @see org.eclipse.ui.internal.ILayoutContainer#allowsAutoFocus()
	*/
	public boolean allowsAutoFocus() {
	return true;
	}

	/* (non-Javadoc)
	* @see org.eclipse.ui.internal.PartSashContainer#isStackType(org.eclipse.ui.internal.LayoutPart)
	*/
	public boolean isStackType(LayoutPart toTest) {
	return (toTest instanceof EditorStack);
	}
	/* (non-Javadoc)
	* @see org.eclipse.ui.internal.PartSashContainer#isPaneType(org.eclipse.ui.internal.LayoutPart)
	*/
	public boolean isPaneType(LayoutPart toTest) {
	return (toTest instanceof EditorPane);
	}
	/* (non-Javadoc)
	* @see org.eclipse.ui.internal.PartSashContainer#createStack(org.eclipse.ui.internal.LayoutPart)
	*/
	protected PartStack createStack() {
	EditorStack newWorkbook = EditorStack.newEditorWorkbook(this, page);

	return newWorkbook;
	}
	/* (non-Javadoc)
	* @see org.eclipse.ui.internal.PartSashContainer#setVisiblePart(org.eclipse.ui.internal.ILayoutContainer, org.eclipse.ui.internal.LayoutPart)
	*/
	protected void setVisiblePart(ILayoutContainer container, LayoutPart visiblePart) {
	EditorStack refPart = (EditorStack)container;

	refPart.becomeActiveWorkbook(true);
	refPart.setVisibleEditor((EditorPane)visiblePart);
	}
	/* (non-Javadoc)
	* @see org.eclipse.ui.internal.PartSashContainer#getVisiblePart(org.eclipse.ui.internal.ILayoutContainer)
	*/
	protected LayoutPart getVisiblePart(ILayoutContainer container) {
	EditorStack refPart = (EditorStack)container;

	return refPart.getVisibleEditor();
	}

	}