/*
* Copyright (c) 2006, 2008 Borland Software Corp.
*
* 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:
* Dmitry Stadnik - initial API and implementation
*/
package org.eclipse.gmf.internal.common.ui;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import org.eclipse.core.resources.IFile;
import org.eclipse.emf.common.ui.dialogs.WorkspaceResourceDialog;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.ContentHandler;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
/**
* @author dstadnik
*/
public class ModelSelectionPage extends WizardPage {
protected final ResourceLocationProvider rloc;
protected Text uriFld;
private int settingUriFld; // flag to ignore modifyText notification when setting uri field value
protected Button loadBtn;
private Button browseFsBtn;
private Button browseWsBtn;
private Button findInWsBtn;
private URI uri;
private Resource resource;
private ResourceSet resourceSet;
private boolean readOnly;
private boolean modelRequired;
private boolean initialized;
private String modelFileExtension;
public ModelSelectionPage(String pageId, ResourceLocationProvider rloc, ResourceSet resourceSet) {
this(pageId, rloc, resourceSet, null);
}
public ModelSelectionPage(String pageId, ResourceLocationProvider rloc, ResourceSet resourceSet, String modelFileExtension) {
super(pageId);
this.rloc = rloc;
this.resourceSet = resourceSet;
setModelFileExtension(modelFileExtension);
}
protected final ResourceSet getResourceSet() {
if (resourceSet == null) {
resourceSet = new ResourceSetImpl();
}
return resourceSet;
}
public void setModelFileExtension(String fileExtension) {
this.modelFileExtension = fileExtension;
}
/**
* @return <code>null</code> if none set
*/
protected String getModelFileExtension() {
return modelFileExtension;
}
public final void createControl(Composite parent) {
Composite plate = new Composite(parent, SWT.NONE);
{
GridLayout layout = new GridLayout();
plate.setLayout(layout);
GridData data = new GridData();
data.verticalAlignment = GridData.FILL;
data.horizontalAlignment = GridData.FILL;
data.grabExcessHorizontalSpace = true;
plate.setLayoutData(data);
}
createTitleAndButtonsRow(plate);
createUriRow(plate);
createAdditionalControls(plate);
setControl(plate);
}
protected void createTitleAndButtonsRow(Composite parent) {
Composite plate = new Composite(parent, SWT.NONE);
{
GridLayout layout = new GridLayout();
layout.numColumns = 4;
plate.setLayout(layout);
plate.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
}
Label label = new Label(plate, SWT.NONE);
label.setText(Messages.ModelSelectionPageModelURI);
label.setLayoutData(new GridData());
browseFsBtn = new Button(plate, SWT.PUSH);
browseFsBtn.setText(Messages.ModelSelectionPageBrowseFS);
browseFsBtn.setLayoutData(new GridData(SWT.END, SWT.CENTER, true, false));
browseWsBtn = new Button(plate, SWT.PUSH);
browseWsBtn.setText(Messages.ModelSelectionPageBrowseWS);
browseWsBtn.setLayoutData(new GridData());
findInWsBtn = new Button(plate, SWT.PUSH);
findInWsBtn.setText(Messages.ModelSelectionPageFindInWS);
findInWsBtn.setLayoutData(new GridData());
// logic
browseFsBtn.addSelectionListener(new SelectionListener() {
public void widgetDefaultSelected(SelectionEvent e) {
}
public void widgetSelected(SelectionEvent e) {
FileDialog fd = new FileDialog(getShell(), SWT.OPEN);
fd.setText(Messages.ModelSelectionPageSelectModel);
String fileName = fd.open();
if (fileName == null) {
return;
}
setURI(URI.createFileURI(fileName));
updateURI();
};
});
browseWsBtn.addSelectionListener(new SelectionListener() {
public void widgetDefaultSelected(SelectionEvent e) {
}
public void widgetSelected(SelectionEvent e) {
ViewerFilter extFilter = new ViewerFilter() {
public boolean select(Viewer viewer, Object parentElement, Object element) {
String ext = getModelFileExtension();
if (ext != null && element instanceof IFile) {
IFile file = (IFile) element;
return ext.equals(file.getFileExtension());
}
return true;
}
};
IFile[] files = WorkspaceResourceDialog.openFileSelection(getShell(), Messages.ModelSelectionPageSelectModel, Messages.ModelSelectionPageSelectModelDesc, false, null, Collections
.singletonList(extFilter));
if (files == null || files.length == 0) {
return;
}
setURI(URI.createPlatformResourceURI(files[0].getFullPath().toString(), true));
updateURI();
}
});
findInWsBtn.addSelectionListener(new SelectionListener() {
public void widgetDefaultSelected(SelectionEvent e) {
}
public void widgetSelected(SelectionEvent e) {
IFile file = FileSelector.selectFile(getShell(), Messages.ModelSelectionPageSelectModel, null, null, getModelFileExtension());
if (file == null) {
return;
}
setURI(URI.createPlatformResourceURI(file.getFullPath().toString(), true));
updateURI();
};
});
}
protected void createUriRow(Composite parent) {
Composite plate = new Composite(parent, SWT.NONE);
{
GridLayout layout = new GridLayout();
layout.numColumns = 2;
plate.setLayout(layout);
GridData data = new GridData();
data.horizontalAlignment = GridData.FILL;
data.grabExcessHorizontalSpace = true;
plate.setLayoutData(data);
}
uriFld = new Text(plate, SWT.SINGLE | SWT.BORDER);
{
GridData data = new GridData();
data.horizontalAlignment = GridData.FILL;
data.grabExcessHorizontalSpace = true;
uriFld.setLayoutData(data);
}
loadBtn = new Button(plate, SWT.PUSH);
loadBtn.setText(Messages.ModelSelectionPageLoad);
{
GridData data = new GridData();
loadBtn.setLayoutData(data);
}
// logic
loadBtn.setEnabled(false);
uriFld.addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent e) {
if (settingUriFld > 0) {
return;
}
setURI(uriFld.getText());
setResource(null);
}
});
loadBtn.addSelectionListener(new SelectionListener() {
public void widgetDefaultSelected(SelectionEvent e) {
}
public void widgetSelected(SelectionEvent e) {
setResource(loadResource());
}
});
}
protected void createAdditionalControls(Composite parent) {
}
public void setReadOnly(boolean value) {
readOnly = value;
uriFld.setEnabled(!value);
browseFsBtn.setEnabled(!value);
browseWsBtn.setEnabled(!value);
findInWsBtn.setEnabled(!value);
}
protected void initControls() {
if (rloc == null || getModelFileExtension() == null) {
return;
}
List<URI> uris = rloc.getSelectedURIs(getModelFileExtension());
if (!uris.isEmpty()) {
setURI(uris.get(0));
updateURI();
}
}
/**
* Updates resource and text control to reflect used URI.
*/
public void updateURI() {
if (readOnly) {
return;
}
try {
settingUriFld++;
if (uri != null) {
uriFld.setText(uri.toString());
setResource(loadResource());
} else {
uriFld.setText(""); //$NON-NLS-1$
setResource(null);
}
} finally {
settingUriFld--;
}
}
/**
* Changes URI to the value provided by string representation.
*/
public void setURI(String uriText) {
if (readOnly) {
return;
}
if (uriText == null || uriText.trim().length() == 0) {
uri = null;
loadBtn.setEnabled(false);
setErrorMessage(null);
return;
}
try {
uri = URI.createURI(uriText.trim());
loadBtn.setEnabled(true);
setErrorMessage(null);
} catch (IllegalArgumentException iae) {
uri = null;
loadBtn.setEnabled(false);
setErrorMessage(NLS.bind(Messages.ModelSelectionPageBadURI, iae.getLocalizedMessage()));
return;
}
}
public void setURI(URI uri) {
if (readOnly) {
return;
}
this.uri = uri;
loadBtn.setEnabled(uri != null);
setErrorMessage(null);
}
public final URI getURI() {
return uri;
}
protected void unloadResource() {
if (this.resource != null) {
if (this.resource.isLoaded()) {
this.resource.unload();
}
getResourceSet().getResources().remove(this.resource);
this.resource = null;
}
}
protected Resource loadResource() {
unloadResource();
assert uri != null;
Resource resource = getResourceSet().createResource(uri, ContentHandler.UNSPECIFIED_CONTENT_TYPE);
if (resource == null) {
setErrorMessage(Messages.ModelSelectionPageModelNA);
return null;
}
try {
resource.load(Collections.EMPTY_MAP);
} catch (IOException ioe) {
setErrorMessage(NLS.bind(Messages.ModelSelectionPageErrorLoadingModel, ioe.getLocalizedMessage()));
return null;
}
setErrorMessage(null);
return resource;
}
protected final void setResource(Resource resource) {
unloadResource();
this.resource = resource;
validatePage();
resourceChanged();
}
public void validatePage() {
if (modelRequired) {
setPageComplete(resource != null);
}
}
public void setVisible(boolean visible) {
if (!initialized && visible) {
initialized = true;
initControls();
}
super.setVisible(visible);
}
protected void resourceChanged() {
}
public final Resource getResource() {
return resource;
}
public final boolean isModelRequired() {
return modelRequired;
}
public void setModelRequired(boolean modelRequired) {
this.modelRequired = modelRequired;
validatePage();
}
}
