ui/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/editor/schema/AbstractSchemaDetails.java - pde/eclipse.pde.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2007 IBM Corporation 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:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.pde.internal.ui.editor.schema;

 import org.eclipse.jface.text.*;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.pde.core.IModelChangedEvent;
 import org.eclipse.pde.internal.core.ischema.ISchemaCompositor;
 import org.eclipse.pde.internal.core.ischema.ISchemaObject;
 import org.eclipse.pde.internal.core.schema.SchemaObject;
 import org.eclipse.pde.internal.ui.PDEUIMessages;
 import org.eclipse.pde.internal.ui.editor.*;
 import org.eclipse.pde.internal.ui.parts.ComboPart;
 import org.eclipse.pde.internal.ui.parts.PDESourceViewer;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.dnd.Clipboard;
 import org.eclipse.swt.events.*;
 import org.eclipse.swt.graphics.GC;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.*;
 import org.eclipse.ui.forms.IFormColors;
 import org.eclipse.ui.forms.IFormPart;
 import org.eclipse.ui.forms.widgets.*;

 public abstract class AbstractSchemaDetails extends PDEDetails {

 	protected static final String[] BOOLS = new String[] {Boolean.toString(true), Boolean.toString(false)};

 	protected int minLabelWeight;

 	private Section fSection;
 	private SchemaDtdDetailsSection fDtdSection = null;
 	private ElementSection fElementSection;
 	private boolean fShowDTD;
 	private boolean fShowDescription;
 	private Spinner fMinOccurSpinner;
 	private Spinner fMaxOccurSpinner;
 	private Button fUnboundSelect;
 	private Label fMinLabel;
 	private Label fMaxLabel;
 	private PDESourceViewer fDescriptionViewer = null;
 	private boolean fBlockListeners = false;
 	private ISchemaObject fSchemaObject;

 	public AbstractSchemaDetails(ElementSection section, boolean showDTD, boolean showDescription) {
 		fElementSection = section;
 		fShowDTD = showDTD;
 		fShowDescription = showDescription;
 	}

 	public void modelChanged(IModelChangedEvent event) {
 		if ((event.getChangeType() == IModelChangedEvent.REMOVE) || (fShowDTD == false) || (fDtdSection == null)) {
 			return;
 		}
 		Object[] objects = event.getChangedObjects();
 		for (int i = 0; i < objects.length; i++) {
 			if (objects[i] instanceof ISchemaCompositor)
 				fDtdSection.updateDTDLabel(objects[i]);
 		}
 	}

 	public final void createContents(Composite parent) {
 		// This is a hacked fix to ensure that the label columns on every details
 		// page have the same width. SchemaDetails_translatable plus 11 pixels
 		// represents the longest label on any field on any details page. This
 		// occurs on SchemaStringAttributeDetails and 11 is the size of the
 		// horizontal indent that contributes to the label's width.
 		GC gc = new GC(parent);
 		minLabelWeight = gc.textExtent(PDEUIMessages.SchemaDetails_translatable).x + 11;
 		gc.dispose();
 		gc = null;

 		parent.setLayout(FormLayoutFactory.createDetailsGridLayout(false, 1));
 		FormToolkit toolkit = getManagedForm().getToolkit();
 		fSection = toolkit.createSection(parent, Section.DESCRIPTION | ExpandableComposite.TITLE_BAR);
 		fSection.clientVerticalSpacing = FormLayoutFactory.SECTION_HEADER_VERTICAL_SPACING;
 		fSection.setLayout(FormLayoutFactory.createClearGridLayout(false, 1));

 		GridData gd;
 		if (fShowDescription)
 			gd = new GridData(GridData.FILL_BOTH);
 		else
 			gd = new GridData(GridData.FILL_HORIZONTAL);
 		fSection.setLayoutData(gd);

 		// Align the master and details section headers (misalignment caused
 		// by section toolbar icons)
 		getPage().alignSectionHeaders(fElementSection.getSection(), fSection);

 		Composite client = toolkit.createComposite(fSection);
 		client.setLayout(FormLayoutFactory.createSectionClientGridLayout(false, 3));

 		createDetails(client);

 		if (fShowDescription)
 			createDescription(client, toolkit);

 		// If the DTD Approximation section was requested, instantiate it and create it's contents
 		// on the same parent Composite
 		if (fShowDTD) {
 			fDtdSection = new SchemaDtdDetailsSection();
 			fDtdSection.initialize(getManagedForm());
 			fDtdSection.createContents(parent);
 		}

 		toolkit.paintBordersFor(client);
 		fSection.setClient(client);
 		markDetailsPart(fSection);

 		if (fShowDescription)
 			fDescriptionViewer.createUIListeners();
 		hookListeners();
 	}

 	private void createDescription(Composite container, FormToolkit toolkit) {

 		Label label = toolkit.createLabel(container, PDEUIMessages.AbstractSchemaDetails_descriptionLabel);
 		GridData gd = new GridData(GridData.VERTICAL_ALIGN_BEGINNING);
 		gd.horizontalSpan = 3;
 		label.setLayoutData(gd);
 		label.setForeground(toolkit.getColors().getColor(IFormColors.TITLE));

 		fDescriptionViewer = new PDESourceViewer(getPage());
 		gd = new GridData(GridData.FILL_BOTH);
 		gd.heightHint = 75;
 		gd.widthHint = 60;
 		gd.horizontalSpan = 3;
 		gd.horizontalIndent = 1;
 		/*
 		 * Needed to align vertically with form entry field and allow space
 		 * for a possible field decoration
 		 * commented out for now since fields are already grossly misaligned (see bug 196879)
 		 * commenting out temporarily makes the alignment better on Element details and Attribute details
 		 * but worse on RootElement details
 		 */
 		//gd.horizontalIndent = FormLayoutFactory.CONTROL_HORIZONTAL_INDENT;
 		fDescriptionViewer.createUI(container, gd);
 		fDescriptionViewer.getDocument().addDocumentListener(new IDocumentListener() {
 			public void documentChanged(DocumentEvent event) {
 				if (blockListeners())
 					return;
 				if (fSchemaObject != null) {
 					// Get the text from the event
 					IDocument document = event.getDocument();
 					if (document == null) {
 						return;
 					}
 					// Get the text from the event
 					String text = document.get().trim();
 					updateObjectDescription(text);
 				}
 			}

 			public void documentAboutToBeChanged(DocumentEvent event) {
 			}
 		});
 	}

 	public abstract void createDetails(Composite parent);

 	public abstract void updateFields(ISchemaObject obj);

 	public abstract void hookListeners();

 	public boolean isEditableElement() {
 		return fElementSection.isEditable();
 	}

 	protected void setDecription(String desc) {
 		fSection.setDescription(desc);
 	}

 	protected void setText(String title) {
 		fSection.setText(title);
 	}

 	public String getContextId() {
 		return SchemaInputContext.CONTEXT_ID;
 	}

 	public PDEFormPage getPage() {
 		return (PDEFormPage) getManagedForm().getContainer();
 	}

 	public boolean isEditable() {
 		return getPage().getPDEEditor().getAggregateModel().isEditable();
 	}

 	public void fireSaveNeeded() {
 		markDirty();
 		getPage().getPDEEditor().fireSaveNeeded(getContextId(), false);
 	}

 	public boolean canPaste(Clipboard clipboard) {
 		if (fShowDescription && fDescriptionViewer != null && fDescriptionViewer.getViewer().getTextWidget().isFocusControl())
 			return fDescriptionViewer.canPaste();
 		return super.canPaste(clipboard);
 	}

 	public boolean doGlobalAction(String actionId) {
 		if (fShowDescription && fDescriptionViewer != null && fDescriptionViewer.getViewer().getTextWidget().isFocusControl())
 			return fDescriptionViewer.doGlobalAction(actionId);
 		return super.doGlobalAction(actionId);
 	}

 	public void selectionChanged(IFormPart part, ISelection selection) {
 		if (!(part instanceof ElementSection))
 			return;
 		Object obj = ((IStructuredSelection) selection).getFirstElement();
 		if (obj instanceof ISchemaObject) {
 			setBlockListeners(true);
 			ISchemaObject sObj = (ISchemaObject) obj;
 			fSchemaObject = sObj;
 			if (fShowDTD && fDtdSection != null)
 				fDtdSection.updateDTDLabel(obj);
 			if (fShowDescription && fDescriptionViewer != null)
 				updateDescriptionViewer(sObj);
 			updateFields(sObj);
 			setBlockListeners(false);
 		}
 	}

 	public void updateDescriptionViewer(ISchemaObject obj) {
 		if (obj != null) {
 			String text = obj.getDescription();
 			fDescriptionViewer.getDocument().set(text == null ? "" : text); //$NON-NLS-1$
 			fDescriptionViewer.getViewer().setEditable(obj.getSchema().isEditable());
 		}
 	}

 	private void updateObjectDescription(String text) {
 		if (fSchemaObject instanceof SchemaObject) {
 			((SchemaObject) fSchemaObject).setDescription(text);
 		}
 	}

 	protected void fireSelectionChange() {
 		fElementSection.fireSelection(fElementSection.getTreeViewer().getSelection());
 	}

 	protected void fireMasterSelection(ISelection selection) {
 		fElementSection.fireSelection(selection);
 	}

 	protected ComboPart createComboPart(Composite parent, FormToolkit toolkit, String[] items, int colspan, int style) {
 		ComboPart cp = new ComboPart();
 		cp.createControl(parent, toolkit, SWT.READ_ONLY);
 		GridData gd = new GridData(style);
 		gd.horizontalSpan = colspan;
 		gd.horizontalIndent = FormLayoutFactory.CONTROL_HORIZONTAL_INDENT;
 		cp.getControl().setLayoutData(gd);
 		cp.setItems(items);
 		cp.getControl().setEnabled(isEditable());
 		return cp;
 	}

 	protected ComboPart createComboPart(Composite parent, FormToolkit toolkit, String[] items, int colspan) {
 		return createComboPart(parent, toolkit, items, colspan, GridData.FILL_HORIZONTAL);
 	}

 	protected Button[] createTrueFalseButtons(Composite parent, FormToolkit toolkit, int colSpan) {
 		Composite comp = toolkit.createComposite(parent, SWT.NONE);
 		GridLayout gl = new GridLayout(2, false);
 		gl.marginHeight = gl.marginWidth = 0;
 		comp.setLayout(gl);
 		GridData gd = new GridData(GridData.FILL_HORIZONTAL);
 		gd.horizontalSpan = colSpan;
 		gd.horizontalIndent = FormLayoutFactory.CONTROL_HORIZONTAL_INDENT;
 		comp.setLayoutData(gd);
 		Button tButton = toolkit.createButton(comp, BOOLS[0], SWT.RADIO);
 		Button fButton = toolkit.createButton(comp, BOOLS[1], SWT.RADIO);
 		gd = new GridData();
 		gd.horizontalIndent = 20;
 		fButton.setLayoutData(gd);
 		return new Button[] {tButton, fButton};
 	}

 	protected Composite createMinOccurComp(Composite parent, FormToolkit toolkit) {
 		fMinLabel = toolkit.createLabel(parent, PDEUIMessages.AbstractSchemaDetails_minOccurLabel);
 		fMinLabel.setForeground(toolkit.getColors().getColor(IFormColors.TITLE));
 		Composite comp = toolkit.createComposite(parent);
 		GridData gd = new GridData(GridData.FILL_HORIZONTAL);
 		gd.horizontalSpan = 2;
 		GridLayout layout = new GridLayout();
 		layout.marginHeight = layout.marginWidth = 0;
 		comp.setLayout(layout);
 		comp.setLayoutData(gd);
 		fMinOccurSpinner = new Spinner(comp, SWT.BORDER);
 		fMinOccurSpinner.setMinimum(0);
 		fMinOccurSpinner.setMaximum(999);
 		return comp;
 	}

 	protected Composite createMaxOccurComp(Composite parent, FormToolkit toolkit) {
 		fMaxLabel = toolkit.createLabel(parent, PDEUIMessages.AbstractSchemaDetails_maxOccurLabel);
 		fMaxLabel.setForeground(toolkit.getColors().getColor(IFormColors.TITLE));
 		Composite comp = toolkit.createComposite(parent);
 		GridData gd = new GridData(GridData.FILL_HORIZONTAL);
 		gd.horizontalSpan = 2;
 		GridLayout layout = new GridLayout(3, false);
 		layout.marginHeight = layout.marginWidth = 0;
 		comp.setLayout(layout);
 		comp.setLayoutData(gd);

 		fMaxOccurSpinner = new Spinner(comp, SWT.BORDER);
 		fMaxOccurSpinner.setMinimum(1);
 		fMaxOccurSpinner.setMaximum(999);
 		fMaxOccurSpinner.setIncrement(1);

 		fUnboundSelect = toolkit.createButton(comp, PDEUIMessages.AbstractSchemaDetails_unboundedButton, SWT.CHECK);
 		gd = new GridData();
 		gd.horizontalIndent = 10;
 		fUnboundSelect.setLayoutData(gd);
 		fUnboundSelect.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				if (blockListeners())
 					return;
 				fMaxOccurSpinner.setEnabled(!fUnboundSelect.getSelection() && isEditableElement());
 			}
 		});

 		return comp;
 	}

 	protected int getMinOccur() {
 		if (fMinOccurSpinner != null)
 			return fMinOccurSpinner.getSelection();
 		return 0;
 	}

 	protected int getMaxOccur() {
 		if (fMaxOccurSpinner != null) {
 			if (fMaxOccurSpinner.isEnabled())
 				return fMaxOccurSpinner.getSelection();
 			return Integer.MAX_VALUE;
 		}
 		return 1;
 	}

 	protected void updateMinOccur(int min) {
 		if (fMinOccurSpinner != null)
 			fMinOccurSpinner.setSelection(min);
 	}

 	protected void updateMaxOccur(int max) {
 		if (fMaxOccurSpinner == null)
 			return;
 		boolean isMax = max == Integer.MAX_VALUE;
 		fUnboundSelect.setSelection(isMax);
 		fMaxOccurSpinner.setEnabled(!isMax);
 		if (!isMax)
 			fMaxOccurSpinner.setSelection(max);
 	}

 	protected void hookMinOccur(SelectionAdapter adapter) {
 		fMinOccurSpinner.addSelectionListener(adapter);
 		fMinOccurSpinner.addModifyListener(new ModifyListener() {
 			public void modifyText(ModifyEvent e) {
 				if (blockListeners())
 					return;
 				int minOccur = fMinOccurSpinner.getSelection();
 				if (minOccur > getMaxOccur())
 					fMinOccurSpinner.setSelection(minOccur - 1);
 			}
 		});
 	}

 	protected void hookMaxOccur(SelectionAdapter adapter) {
 		fUnboundSelect.addSelectionListener(adapter);
 		fMaxOccurSpinner.addSelectionListener(adapter);
 		fMaxOccurSpinner.addModifyListener(new ModifyListener() {
 			public void modifyText(ModifyEvent e) {
 				if (blockListeners())
 					return;
 				int maxValue = fMaxOccurSpinner.getSelection();
 				if (maxValue < getMinOccur())
 					fMaxOccurSpinner.setSelection(maxValue + 1);
 			}
 		});
 	}

 	protected void enableMinMax(boolean enable) {
 		fMinOccurSpinner.setEnabled(enable);
 		fMaxOccurSpinner.setEnabled(!fUnboundSelect.getSelection() && enable);
 		fUnboundSelect.setEnabled(enable);
 		fMinLabel.setEnabled(enable);
 		fMaxLabel.setEnabled(enable);
 	}

 	protected boolean blockListeners() {
 		return fBlockListeners;
 	}

 	protected void setBlockListeners(boolean blockListeners) {
 		fBlockListeners = blockListeners;
 	}

 	public void dispose() {
 		// Set the context menu to null to prevent the editor context menu
 		// from being disposed along with the source viewer
 		if (fDescriptionViewer != null) {
 			fDescriptionViewer.unsetMenu();
 			fDescriptionViewer = null;
 		}
 		super.dispose();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2007 IBM Corporation 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:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.pde.internal.ui.editor.schema;

	import org.eclipse.jface.text.*;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.pde.core.IModelChangedEvent;
	import org.eclipse.pde.internal.core.ischema.ISchemaCompositor;
	import org.eclipse.pde.internal.core.ischema.ISchemaObject;
	import org.eclipse.pde.internal.core.schema.SchemaObject;
	import org.eclipse.pde.internal.ui.PDEUIMessages;
	import org.eclipse.pde.internal.ui.editor.*;
	import org.eclipse.pde.internal.ui.parts.ComboPart;
	import org.eclipse.pde.internal.ui.parts.PDESourceViewer;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.dnd.Clipboard;
	import org.eclipse.swt.events.*;
	import org.eclipse.swt.graphics.GC;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.*;
	import org.eclipse.ui.forms.IFormColors;
	import org.eclipse.ui.forms.IFormPart;
	import org.eclipse.ui.forms.widgets.*;

	public abstract class AbstractSchemaDetails extends PDEDetails {

	protected static final String[] BOOLS = new String[] {Boolean.toString(true), Boolean.toString(false)};

	protected int minLabelWeight;

	private Section fSection;
	private SchemaDtdDetailsSection fDtdSection = null;
	private ElementSection fElementSection;
	private boolean fShowDTD;
	private boolean fShowDescription;
	private Spinner fMinOccurSpinner;
	private Spinner fMaxOccurSpinner;
	private Button fUnboundSelect;
	private Label fMinLabel;
	private Label fMaxLabel;
	private PDESourceViewer fDescriptionViewer = null;
	private boolean fBlockListeners = false;
	private ISchemaObject fSchemaObject;

	public AbstractSchemaDetails(ElementSection section, boolean showDTD, boolean showDescription) {
	fElementSection = section;
	fShowDTD = showDTD;
	fShowDescription = showDescription;
	}

	public void modelChanged(IModelChangedEvent event) {
	if ((event.getChangeType() == IModelChangedEvent.REMOVE) \|\| (fShowDTD == false) \|\| (fDtdSection == null)) {
	return;
	}
	Object[] objects = event.getChangedObjects();
	for (int i = 0; i < objects.length; i++) {
	if (objects[i] instanceof ISchemaCompositor)
	fDtdSection.updateDTDLabel(objects[i]);
	}
	}

	public final void createContents(Composite parent) {
	// This is a hacked fix to ensure that the label columns on every details
	// page have the same width. SchemaDetails_translatable plus 11 pixels
	// represents the longest label on any field on any details page. This
	// occurs on SchemaStringAttributeDetails and 11 is the size of the
	// horizontal indent that contributes to the label's width.
	GC gc = new GC(parent);
	minLabelWeight = gc.textExtent(PDEUIMessages.SchemaDetails_translatable).x + 11;
	gc.dispose();
	gc = null;

	parent.setLayout(FormLayoutFactory.createDetailsGridLayout(false, 1));
	FormToolkit toolkit = getManagedForm().getToolkit();
	fSection = toolkit.createSection(parent, Section.DESCRIPTION \| ExpandableComposite.TITLE_BAR);
	fSection.clientVerticalSpacing = FormLayoutFactory.SECTION_HEADER_VERTICAL_SPACING;
	fSection.setLayout(FormLayoutFactory.createClearGridLayout(false, 1));

	GridData gd;
	if (fShowDescription)
	gd = new GridData(GridData.FILL_BOTH);
	else
	gd = new GridData(GridData.FILL_HORIZONTAL);
	fSection.setLayoutData(gd);

	// Align the master and details section headers (misalignment caused
	// by section toolbar icons)
	getPage().alignSectionHeaders(fElementSection.getSection(), fSection);

	Composite client = toolkit.createComposite(fSection);
	client.setLayout(FormLayoutFactory.createSectionClientGridLayout(false, 3));

	createDetails(client);

	if (fShowDescription)
	createDescription(client, toolkit);

	// If the DTD Approximation section was requested, instantiate it and create it's contents
	// on the same parent Composite
	if (fShowDTD) {
	fDtdSection = new SchemaDtdDetailsSection();
	fDtdSection.initialize(getManagedForm());
	fDtdSection.createContents(parent);
	}

	toolkit.paintBordersFor(client);
	fSection.setClient(client);
	markDetailsPart(fSection);

	if (fShowDescription)
	fDescriptionViewer.createUIListeners();
	hookListeners();
	}

	private void createDescription(Composite container, FormToolkit toolkit) {

	Label label = toolkit.createLabel(container, PDEUIMessages.AbstractSchemaDetails_descriptionLabel);
	GridData gd = new GridData(GridData.VERTICAL_ALIGN_BEGINNING);
	gd.horizontalSpan = 3;
	label.setLayoutData(gd);
	label.setForeground(toolkit.getColors().getColor(IFormColors.TITLE));

	fDescriptionViewer = new PDESourceViewer(getPage());
	gd = new GridData(GridData.FILL_BOTH);
	gd.heightHint = 75;
	gd.widthHint = 60;
	gd.horizontalSpan = 3;
	gd.horizontalIndent = 1;
	/*
	* Needed to align vertically with form entry field and allow space
	* for a possible field decoration
	* commented out for now since fields are already grossly misaligned (see bug 196879)
	* commenting out temporarily makes the alignment better on Element details and Attribute details
	* but worse on RootElement details
	*/
	//gd.horizontalIndent = FormLayoutFactory.CONTROL_HORIZONTAL_INDENT;
	fDescriptionViewer.createUI(container, gd);
	fDescriptionViewer.getDocument().addDocumentListener(new IDocumentListener() {
	public void documentChanged(DocumentEvent event) {
	if (blockListeners())
	return;
	if (fSchemaObject != null) {
	// Get the text from the event
	IDocument document = event.getDocument();
	if (document == null) {
	return;
	}
	// Get the text from the event
	String text = document.get().trim();
	updateObjectDescription(text);
	}
	}

	public void documentAboutToBeChanged(DocumentEvent event) {
	}
	});
	}

	public abstract void createDetails(Composite parent);

	public abstract void updateFields(ISchemaObject obj);

	public abstract void hookListeners();

	public boolean isEditableElement() {
	return fElementSection.isEditable();
	}

	protected void setDecription(String desc) {
	fSection.setDescription(desc);
	}

	protected void setText(String title) {
	fSection.setText(title);
	}

	public String getContextId() {
	return SchemaInputContext.CONTEXT_ID;
	}

	public PDEFormPage getPage() {
	return (PDEFormPage) getManagedForm().getContainer();
	}

	public boolean isEditable() {
	return getPage().getPDEEditor().getAggregateModel().isEditable();
	}

	public void fireSaveNeeded() {
	markDirty();
	getPage().getPDEEditor().fireSaveNeeded(getContextId(), false);
	}

	public boolean canPaste(Clipboard clipboard) {
	if (fShowDescription && fDescriptionViewer != null && fDescriptionViewer.getViewer().getTextWidget().isFocusControl())
	return fDescriptionViewer.canPaste();
	return super.canPaste(clipboard);
	}

	public boolean doGlobalAction(String actionId) {
	if (fShowDescription && fDescriptionViewer != null && fDescriptionViewer.getViewer().getTextWidget().isFocusControl())
	return fDescriptionViewer.doGlobalAction(actionId);
	return super.doGlobalAction(actionId);
	}

	public void selectionChanged(IFormPart part, ISelection selection) {
	if (!(part instanceof ElementSection))
	return;
	Object obj = ((IStructuredSelection) selection).getFirstElement();
	if (obj instanceof ISchemaObject) {
	setBlockListeners(true);
	ISchemaObject sObj = (ISchemaObject) obj;
	fSchemaObject = sObj;
	if (fShowDTD && fDtdSection != null)
	fDtdSection.updateDTDLabel(obj);
	if (fShowDescription && fDescriptionViewer != null)
	updateDescriptionViewer(sObj);
	updateFields(sObj);
	setBlockListeners(false);
	}
	}

	public void updateDescriptionViewer(ISchemaObject obj) {
	if (obj != null) {
	String text = obj.getDescription();
	fDescriptionViewer.getDocument().set(text == null ? "" : text); //$NON-NLS-1$
	fDescriptionViewer.getViewer().setEditable(obj.getSchema().isEditable());
	}
	}

	private void updateObjectDescription(String text) {
	if (fSchemaObject instanceof SchemaObject) {
	((SchemaObject) fSchemaObject).setDescription(text);
	}
	}

	protected void fireSelectionChange() {
	fElementSection.fireSelection(fElementSection.getTreeViewer().getSelection());
	}

	protected void fireMasterSelection(ISelection selection) {
	fElementSection.fireSelection(selection);
	}

	protected ComboPart createComboPart(Composite parent, FormToolkit toolkit, String[] items, int colspan, int style) {
	ComboPart cp = new ComboPart();
	cp.createControl(parent, toolkit, SWT.READ_ONLY);
	GridData gd = new GridData(style);
	gd.horizontalSpan = colspan;
	gd.horizontalIndent = FormLayoutFactory.CONTROL_HORIZONTAL_INDENT;
	cp.getControl().setLayoutData(gd);
	cp.setItems(items);
	cp.getControl().setEnabled(isEditable());
	return cp;
	}

	protected ComboPart createComboPart(Composite parent, FormToolkit toolkit, String[] items, int colspan) {
	return createComboPart(parent, toolkit, items, colspan, GridData.FILL_HORIZONTAL);
	}

	protected Button[] createTrueFalseButtons(Composite parent, FormToolkit toolkit, int colSpan) {
	Composite comp = toolkit.createComposite(parent, SWT.NONE);
	GridLayout gl = new GridLayout(2, false);
	gl.marginHeight = gl.marginWidth = 0;
	comp.setLayout(gl);
	GridData gd = new GridData(GridData.FILL_HORIZONTAL);
	gd.horizontalSpan = colSpan;
	gd.horizontalIndent = FormLayoutFactory.CONTROL_HORIZONTAL_INDENT;
	comp.setLayoutData(gd);
	Button tButton = toolkit.createButton(comp, BOOLS[0], SWT.RADIO);
	Button fButton = toolkit.createButton(comp, BOOLS[1], SWT.RADIO);
	gd = new GridData();
	gd.horizontalIndent = 20;
	fButton.setLayoutData(gd);
	return new Button[] {tButton, fButton};
	}

	protected Composite createMinOccurComp(Composite parent, FormToolkit toolkit) {
	fMinLabel = toolkit.createLabel(parent, PDEUIMessages.AbstractSchemaDetails_minOccurLabel);
	fMinLabel.setForeground(toolkit.getColors().getColor(IFormColors.TITLE));
	Composite comp = toolkit.createComposite(parent);
	GridData gd = new GridData(GridData.FILL_HORIZONTAL);
	gd.horizontalSpan = 2;
	GridLayout layout = new GridLayout();
	layout.marginHeight = layout.marginWidth = 0;
	comp.setLayout(layout);
	comp.setLayoutData(gd);
	fMinOccurSpinner = new Spinner(comp, SWT.BORDER);
	fMinOccurSpinner.setMinimum(0);
	fMinOccurSpinner.setMaximum(999);
	return comp;
	}

	protected Composite createMaxOccurComp(Composite parent, FormToolkit toolkit) {
	fMaxLabel = toolkit.createLabel(parent, PDEUIMessages.AbstractSchemaDetails_maxOccurLabel);
	fMaxLabel.setForeground(toolkit.getColors().getColor(IFormColors.TITLE));
	Composite comp = toolkit.createComposite(parent);
	GridData gd = new GridData(GridData.FILL_HORIZONTAL);
	gd.horizontalSpan = 2;
	GridLayout layout = new GridLayout(3, false);
	layout.marginHeight = layout.marginWidth = 0;
	comp.setLayout(layout);
	comp.setLayoutData(gd);

	fMaxOccurSpinner = new Spinner(comp, SWT.BORDER);
	fMaxOccurSpinner.setMinimum(1);
	fMaxOccurSpinner.setMaximum(999);
	fMaxOccurSpinner.setIncrement(1);

	fUnboundSelect = toolkit.createButton(comp, PDEUIMessages.AbstractSchemaDetails_unboundedButton, SWT.CHECK);
	gd = new GridData();
	gd.horizontalIndent = 10;
	fUnboundSelect.setLayoutData(gd);
	fUnboundSelect.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	if (blockListeners())
	return;
	fMaxOccurSpinner.setEnabled(!fUnboundSelect.getSelection() && isEditableElement());
	}
	});

	return comp;
	}

	protected int getMinOccur() {
	if (fMinOccurSpinner != null)
	return fMinOccurSpinner.getSelection();
	return 0;
	}

	protected int getMaxOccur() {
	if (fMaxOccurSpinner != null) {
	if (fMaxOccurSpinner.isEnabled())
	return fMaxOccurSpinner.getSelection();
	return Integer.MAX_VALUE;
	}
	return 1;
	}

	protected void updateMinOccur(int min) {
	if (fMinOccurSpinner != null)
	fMinOccurSpinner.setSelection(min);
	}

	protected void updateMaxOccur(int max) {
	if (fMaxOccurSpinner == null)
	return;
	boolean isMax = max == Integer.MAX_VALUE;
	fUnboundSelect.setSelection(isMax);
	fMaxOccurSpinner.setEnabled(!isMax);
	if (!isMax)
	fMaxOccurSpinner.setSelection(max);
	}

	protected void hookMinOccur(SelectionAdapter adapter) {
	fMinOccurSpinner.addSelectionListener(adapter);
	fMinOccurSpinner.addModifyListener(new ModifyListener() {
	public void modifyText(ModifyEvent e) {
	if (blockListeners())
	return;
	int minOccur = fMinOccurSpinner.getSelection();
	if (minOccur > getMaxOccur())
	fMinOccurSpinner.setSelection(minOccur - 1);
	}
	});
	}

	protected void hookMaxOccur(SelectionAdapter adapter) {
	fUnboundSelect.addSelectionListener(adapter);
	fMaxOccurSpinner.addSelectionListener(adapter);
	fMaxOccurSpinner.addModifyListener(new ModifyListener() {
	public void modifyText(ModifyEvent e) {
	if (blockListeners())
	return;
	int maxValue = fMaxOccurSpinner.getSelection();
	if (maxValue < getMinOccur())
	fMaxOccurSpinner.setSelection(maxValue + 1);
	}
	});
	}

	protected void enableMinMax(boolean enable) {
	fMinOccurSpinner.setEnabled(enable);
	fMaxOccurSpinner.setEnabled(!fUnboundSelect.getSelection() && enable);
	fUnboundSelect.setEnabled(enable);
	fMinLabel.setEnabled(enable);
	fMaxLabel.setEnabled(enable);
	}

	protected boolean blockListeners() {
	return fBlockListeners;
	}

	protected void setBlockListeners(boolean blockListeners) {
	fBlockListeners = blockListeners;
	}

	public void dispose() {
	// Set the context menu to null to prevent the editor context menu
	// from being disposed along with the source viewer
	if (fDescriptionViewer != null) {
	fDescriptionViewer.unsetMenu();
	fDescriptionViewer = null;
	}
	super.dispose();
	}
	}