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/*****************************************************************************
* Copyright (c) 2015, 2016 CEA LIST, Christian W. Damus, 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:
* CEA LIST - Initial API and implementation
* Christian W. Damus - bug 501833
*
*****************************************************************************/
package org.eclipse.papyrus.infra.widgets.editors;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.TextViewer;
import org.eclipse.jface.text.contentassist.ContentAssistEvent;
import org.eclipse.jface.text.contentassist.ContentAssistant;
import org.eclipse.jface.text.contentassist.ICompletionListener;
import org.eclipse.jface.text.contentassist.ICompletionProposal;
import org.eclipse.jface.text.contentassist.ICompletionProposalSorter;
import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
import org.eclipse.papyrus.infra.widgets.util.IPapyrusConverter;
import org.eclipse.papyrus.infra.widgets.util.ISetPapyrusConverter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
/**
* @author Vincent Lorenzo
*
* This class allows to build a StyledText widget allowing the completion
*
*/
public class StringEditorWithCompletionWrapper implements ISetPapyrusConverter {
private static final String CONTENT_ASSIST_COMMAND_ID = "org.eclipse.ui.edit.text.contentAssist.proposals"; //$NON-NLS-1$
/**
* the parser used to convert object to string and string to object
*/
public IPapyrusConverter parser;
/**
* boolean indicating if the content assist popup is opened
*/
private boolean delayedIsOpen = false;
/**
* the text viewer
*/
private TextViewer textViewer;
/**
*
* Constructor.
*
* @param parent
* the parent to use to create the TextWidget
* @param helper
* the helper to use to find the elements by their name
*/
public StringEditorWithCompletionWrapper(Composite parent, IPapyrusConverter parser) {
setPapyrusConverter(parser);
buildControls(parent, SWT.NONE);
}
/**
*
* Constructor.
*
* @param parent
* the parent to use to create the TextWidget
* @param helper
* the helper to use to find the elements by their name
*/
public StringEditorWithCompletionWrapper(Composite parent, int style, IPapyrusConverter parser) {
setPapyrusConverter(parser);
buildControls(parent, style);
}
/**
*
* Constructor.
*
* @param parent
* the parent to use to create the TextWidget
* @param helper
* the helper to use to find the elements by their name
*/
public StringEditorWithCompletionWrapper(Composite parent, int style) {
buildControls(parent, style);
}
/**
*
* @return
* the text viewer used
*/
public TextViewer getTextViewer() {
return this.textViewer;
}
/**
*
* @return
* the styled text used or <code>null</code>
*/
public StyledText getTextWidget() {
if (this.textViewer != null) {
return this.textViewer.getTextWidget();
}
return null;
}
/**
*
* @return
* <code>true</code> if the content assist is currently opened
*/
public boolean isContentAssistOpened() {
return delayedIsOpen;
}
private ContentAssistant assistant;
private IContentAssistProcessor processor;
private void buildControls(Composite parent, int style) {
// setLayout(new FillLayout());
textViewer = new TextViewer(parent, SWT.SINGLE | SWT.V_SCROLL | style);
textViewer.setDocument(new Document());
this.assistant = new ContentAssistant();
if (parser != null) {
this.processor = parser.getCompletionProcessor(null);
assistant.setContentAssistProcessor(this.processor, IDocument.DEFAULT_CONTENT_TYPE);
}
// Manage the sorter for the completion proposal
assistant.setSorter(new ICompletionProposalSorter() {
@Override
public int compare(final ICompletionProposal p1, final ICompletionProposal p2) {
return p1.getDisplayString().compareTo(p2.getDisplayString());
}
});
assistant.install(textViewer);
assistant.addCompletionListener(new ICompletionListener() {
@Override
public void selectionChanged(ICompletionProposal proposal, boolean smartToggle) {
}
@Override
public void assistSessionStarted(ContentAssistEvent event) {
// reset open status asynchronously.
Display.getDefault().asyncExec(new Runnable() {
@Override
public void run() {
delayedIsOpen = true;
}
});
}
@Override
public void assistSessionEnded(ContentAssistEvent event) {
// reset open status asynchronously.
Display.getDefault().asyncExec(new Runnable() {
@Override
public void run() {
delayedIsOpen = false;
}
});
}
});
// Hook up the user's preferred key binding for content assist
PlatformUIUtils.handleCommand(textViewer.getControl(), CONTENT_ASSIST_COMMAND_ID,
"CTRL+SPACE", //$NON-NLS-1$ // The default on all platforms
assistant::showPossibleCompletions);
}
/**
* @see org.eclipse.papyrus.infra.widgets.util.ISetPapyrusConverter#setPapyrusConverter(org.eclipse.papyrus.infra.widgets.util.IPapyrusConverter)
*
* @param parser
*/
@Override
public void setPapyrusConverter(IPapyrusConverter parser) {
this.parser = parser;
if (parser != null && assistant != null && processor == null) {
this.processor = parser.getCompletionProcessor(null);
assistant.setContentAssistProcessor(this.processor, IDocument.DEFAULT_CONTENT_TYPE);
}
}
}
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