/*******************************************************************************
* Copyright (c) 2000, 2006 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.ui.examples.readmetool;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.dialogs.PropertyPage;
/**
* This page will be added to the property page dialog
* when the "Properties..." popup menu item is selected
* for Readme files.
*/
public class ReadmeFilePropertyPage extends PropertyPage {
/**
* Utility method that creates a new composite and
* sets up its layout data.
*
* @param parent the parent of the composite
* @param numColumns the number of columns in the new composite
* @return the newly-created composite
*/
protected Composite createComposite(Composite parent, int numColumns) {
Composite composite = new Composite(parent, SWT.NULL);
GridLayout layout = new GridLayout();
layout.numColumns = numColumns;
composite.setLayout(layout);
GridData data = new GridData();
data.verticalAlignment = GridData.FILL;
data.horizontalAlignment = GridData.FILL;
composite.setLayoutData(data);
return composite;
}
@Override
public Control createContents(Composite parent) {
// ensure the page has no special buttons
noDefaultAndApplyButton();
Composite panel = createComposite(parent, 2);
PlatformUI.getWorkbench().getHelpSystem().setHelp(getControl(),
IReadmeConstants.PROPERTY_PAGE_CONTEXT);
// layout the page
IResource resource = (IResource) getElement();
IStatus result = null;
if (resource.getType() == IResource.FILE) {
Label label = createLabel(panel, MessageUtil.getString("File_name")); //$NON-NLS-1$
label = createLabel(panel, resource.getName());
grabExcessSpace(label);
//
createLabel(panel, MessageUtil.getString("Path")); //$NON-NLS-1$
label = createLabel(panel, resource.getFullPath().setDevice(null)
.toString());
grabExcessSpace(label);
//
createLabel(panel, MessageUtil.getString("Size")); //$NON-NLS-1$
InputStream contentStream = null;
try {
IFile file = (IFile) resource;
contentStream = file.getContents();
Reader in = new InputStreamReader(contentStream);
int chunkSize = contentStream.available();
StringBuffer buffer = new StringBuffer(chunkSize);
char[] readBuffer = new char[chunkSize];
int n = in.read(readBuffer);
while (n > 0) {
buffer.append(readBuffer);
n = in.read(readBuffer);
}
contentStream.close();
label = createLabel(panel, Integer.toString(buffer.length()));
} catch (CoreException e) {
result = e.getStatus();
String message = result.getMessage();
if (message == null)
label = createLabel(panel, MessageUtil.getString("<Unknown>")); //$NON-NLS-1$
else
label = createLabel(panel, message);
} catch (IOException e) {
label = createLabel(panel, MessageUtil.getString("<Unknown>")); //$NON-NLS-1$
} finally {
if (contentStream != null) {
try {
contentStream.close();
} catch (IOException e) {
// do nothing
}
}
}
grabExcessSpace(label);
createLabel(panel, MessageUtil.getString("Number_of_sections")); //$NON-NLS-1$
// We will get the sections property and simply
// report number of elements found.
IAdaptable sections = getSections(resource);
if (sections instanceof AdaptableList) {
AdaptableList list = (AdaptableList) sections;
label = createLabel(panel, String.valueOf(list.size()));
grabExcessSpace(label);
}
}
//
Label label = createLabel(panel, MessageUtil
.getString("Additional_information")); //$NON-NLS-1$
grabExcessSpace(label);
GridData gd = (GridData) label.getLayoutData();
gd.horizontalSpan = 2;
return new Canvas(panel, 0);
}
/**
* Utility method that creates a new label and sets up its layout data.
*
* @param parent the parent of the label
* @param text the text of the label
* @return the newly-created label
*/
protected Label createLabel(Composite parent, String text) {
Label label = new Label(parent, SWT.LEFT);
label.setText(text);
GridData data = new GridData();
data.horizontalAlignment = GridData.FILL;
label.setLayoutData(data);
return label;
}
/**
* Returns the readme sections for this resource, or null
* if not applicable (resource is not a readme file).
*/
private AdaptableList getSections(IAdaptable adaptable) {
if (adaptable instanceof IFile)
return ReadmeModelFactory.getInstance().getSections(
(IFile) adaptable);
return null;
}
/**
* Sets this control to grab any excess horizontal space
* left in the window.
*
* @param control the control for which to grab excess space
*/
private void grabExcessSpace(Control control) {
GridData gd = (GridData) control.getLayoutData();
if (gd != null) {
gd.grabExcessHorizontalSpace = true;
}
}
/** (non-Javadoc)
* Method declared on PreferencePage
*/
@Override
public boolean performOk() {
// nothing to do - read-only page
return true;
}
}