/*******************************************************************************
* Copyright (c) 2005, 2009 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.ltk.internal.ui.refactoring.model;
import org.eclipse.swt.SWT;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.jface.internal.text.html.HTMLPrinter;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.text.TextSelection;
import org.eclipse.ltk.core.refactoring.RefactoringDescriptor;
import org.eclipse.ltk.core.refactoring.RefactoringDescriptorProxy;
/**
* Viewer which displays a summary of a pending refactoring.
*
* @since 3.2
*/
public class RefactoringDescriptorViewer extends Viewer {
/** The viewer control */
protected final Browser fBrowser;
/** The viewer input, or <code>null</code> */
private RefactoringDescriptorProxy fDescriptor= null;
/**
* Creates a new refactoring descriptor viewer.
*
* @param parent
* the parent control
* @param style
* the style
*/
public RefactoringDescriptorViewer(final Composite parent, final int style) {
Assert.isNotNull(parent);
fBrowser= new Browser(parent, style);
fBrowser.setJavascriptEnabled(false);
final Display display= parent.getDisplay();
fBrowser.setForeground(display.getSystemColor(SWT.COLOR_LIST_FOREGROUND));
fBrowser.setBackground(display.getSystemColor(SWT.COLOR_LIST_BACKGROUND));
}
/**
* {@inheritDoc}
*/
public Control getControl() {
return fBrowser;
}
/**
* {@inheritDoc}
*/
public Object getInput() {
return fDescriptor;
}
/**
* Returns the input text for the specified refactoring descriptor proxy.
*
* @param proxy
* the refactoring descriptor proxy, or <code>null</code>
* @return the input text
*/
protected String getInputText(final RefactoringDescriptorProxy proxy) {
final StringBuffer buffer= new StringBuffer();
// XXX: should use style sheet and set dialog font.
HTMLPrinter.insertPageProlog(buffer, 0);
if (proxy != null) {
HTMLPrinter.addSmallHeader(buffer, HTMLPrinter.convertToHTMLContent(proxy.getDescription()));
final RefactoringDescriptor descriptor= proxy.requestDescriptor(new NullProgressMonitor());
if (descriptor != null) {
final String comment= descriptor.getComment();
if (comment != null && !"".equals(comment)) //$NON-NLS-1$
HTMLPrinter.addParagraph(buffer, HTMLPrinter.convertToHTMLContent(comment));
HTMLPrinter.startBulletList(buffer);
final int flags= descriptor.getFlags();
if ((flags & RefactoringDescriptor.BREAKING_CHANGE) > 0)
HTMLPrinter.addBullet(buffer, ModelMessages.RefactoringDescriptorViewer_breaking_change_message);
if ((flags & RefactoringDescriptor.STRUCTURAL_CHANGE) > 0)
HTMLPrinter.addBullet(buffer, ModelMessages.RefactoringDescriptorViewer_structural_change_message);
if ((flags & RefactoringDescriptor.MULTI_CHANGE) > 0)
HTMLPrinter.addBullet(buffer, ModelMessages.RefactoringDescriptorViewer_closure_change_message);
HTMLPrinter.endBulletList(buffer);
}
}
HTMLPrinter.addPageEpilog(buffer);
return buffer.toString();
}
/**
* {@inheritDoc}
*/
public ISelection getSelection() {
return new TextSelection(0, 0);
}
/**
* {@inheritDoc}
*/
public void refresh() {
String text= getInputText(fDescriptor);
if (text != null && text.length() > 0) {
if ((fBrowser.getShell().getStyle() & SWT.RIGHT_TO_LEFT) != 0) {
final StringBuffer buffer= new StringBuffer(text);
HTMLPrinter.insertStyles(buffer, new String[] { "direction:rtl", "overflow:hidden"}); //$NON-NLS-1$ //$NON-NLS-2$
text= buffer.toString();
}
}
fBrowser.setText(text);
}
/**
* {@inheritDoc}
*/
public void setInput(final Object input) {
if (input instanceof RefactoringDescriptorProxy) {
fDescriptor= (RefactoringDescriptorProxy) input;
refresh();
} else
fDescriptor= null;
}
/**
* {@inheritDoc}
*/
public void setSelection(final ISelection selection, final boolean reveal) {
// Do nothing
}
}