org.eclipse.lsp4e/src/org/eclipse/lsp4e/ui/LanguageServerPreferencePage.java - lsp4e/lsp4e - Git at Google

 /*******************************************************************************
  * Copyright (c) 2016-2017 Red Hat Inc. and others.
  * This program and the accompanying materials are made
  * available under the terms of the Eclipse Public License 2.0
  * which is available at https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *  Mickael Istria (Red Hat Inc.) - initial implementation
  *******************************************************************************/
 package org.eclipse.lsp4e.ui;

 import java.util.ArrayList;
 import java.util.List;

 import org.eclipse.jface.action.Action;
 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.layout.GridDataFactory;
 import org.eclipse.jface.preference.PreferencePage;
 import org.eclipse.jface.viewers.ArrayContentProvider;
 import org.eclipse.jface.viewers.CheckboxTableViewer;
 import org.eclipse.jface.viewers.ColumnLabelProvider;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.jface.viewers.TableViewerColumn;
 import org.eclipse.lsp4e.ContentTypeToLSPLaunchConfigEntry;
 import org.eclipse.lsp4e.ContentTypeToLanguageServerDefinition;
 import org.eclipse.lsp4e.LanguageServersRegistry;
 import org.eclipse.lsp4e.enablement.EnablementTester;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Color;
 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.Control;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Link;
 import org.eclipse.ui.IEditorReference;
 import org.eclipse.ui.IWorkbench;
 import org.eclipse.ui.IWorkbenchPage;
 import org.eclipse.ui.IWorkbenchPreferencePage;
 import org.eclipse.ui.IWorkbenchWindow;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.preferences.IWorkbenchPreferenceContainer;

 public class LanguageServerPreferencePage extends PreferencePage implements IWorkbenchPreferencePage {

 	private LanguageServersRegistry registry;
 	private List<ContentTypeToLSPLaunchConfigEntry> workingCopy;
 	private Button removeButton;
 	private CheckboxTableViewer checkboxViewer;
 	private TableViewer viewer;
 	private SelectionAdapter contentTypeLinkListener;
 	private List<ContentTypeToLanguageServerDefinition> changedDefinitions;

 	public LanguageServerPreferencePage() {

 		contentTypeLinkListener = new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				if (getContainer() instanceof IWorkbenchPreferenceContainer) {
 					((IWorkbenchPreferenceContainer)getContainer()).openPage("org.eclipse.ui.preferencePages.ContentTypes", null); //$NON-NLS-1$
 				}
 			}
 		};
 	}

 	@Override
 	public void init(IWorkbench workbench) {
 		this.changedDefinitions = new ArrayList<>();
 		this.registry = LanguageServersRegistry.getInstance();
 	}

 	@Override
 	public void setVisible(boolean visible) {
 		super.setVisible(visible);
 		if (visible) {
 			this.checkboxViewer.refresh();
 		}
 	}

 	@Override
 	protected Control createContents(Composite parent) {
 		Composite res = new Composite(parent, SWT.NONE);
 		res.setLayout(new GridLayout(2, false));
 		Link intro = new Link(res, SWT.WRAP);
 		GridDataFactory.swtDefaults().align(SWT.FILL, SWT.TOP).grab(true, false).span(2, 1).hint(400, SWT.DEFAULT).applyTo(intro);
 		intro.setText(Messages.PreferencesPage_Intro);
 		intro.addSelectionListener(this.contentTypeLinkListener);

 		createStaticServersTable(res);

 		Link manualServersIntro = new Link(res, SWT.WRAP);
 		GridDataFactory.swtDefaults().align(SWT.FILL, SWT.TOP).grab(true, false).span(2, 1).hint(400, SWT.DEFAULT).applyTo(manualServersIntro);
 		manualServersIntro.setText(Messages.PreferencesPage_manualServers);
 		manualServersIntro.addSelectionListener(this.contentTypeLinkListener);
 		viewer = new TableViewer(res);
 		viewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
 		viewer.setContentProvider(new ArrayContentProvider());
 		workingCopy = new ArrayList<>();
 		workingCopy.addAll(LanguageServersRegistry.getInstance().getContentTypeToLSPLaunches());
 		TableViewerColumn contentTypeColumn = new TableViewerColumn(viewer, SWT.NONE);
 		contentTypeColumn.getColumn().setText(Messages.PreferencesPage_contentType);
 		contentTypeColumn.getColumn().setWidth(200);
 		contentTypeColumn.setLabelProvider(new ColumnLabelProvider() {
 			@Override
 			public String getText(Object element) {
 				return ((ContentTypeToLanguageServerDefinition)element).getKey().getName();
 			}
 		});
 		TableViewerColumn launchConfigColumn = new TableViewerColumn(viewer, SWT.NONE);
 		launchConfigColumn.getColumn().setText(Messages.PreferencesPage_LaunchConfiguration);
 		launchConfigColumn.getColumn().setWidth(300);
 		launchConfigColumn.setLabelProvider(new ColumnLabelProvider() {
 			@Override
 			public String getText(Object element) {
 				return ((ContentTypeToLSPLaunchConfigEntry)element).getLaunchConfiguration().getName();
 			}
 		});
 		TableViewerColumn launchModeColumn = new TableViewerColumn(viewer, SWT.NONE);
 		launchModeColumn.getColumn().setText(Messages.PreferencesPage_LaunchMode);
 		launchModeColumn.getColumn().setWidth(100);
 		launchModeColumn.setLabelProvider(new ColumnLabelProvider() {
 			@Override
 			public String getText(Object element) {
 				StringBuilder res = new StringBuilder();
 				for (String s : ((ContentTypeToLSPLaunchConfigEntry)element).getLaunchModes()) {
 					res.append(s);
 					res.append(',');
 				}
 				if (res.length() > 0) {
 					res.deleteCharAt(res.length() - 1);
 				}
 				return res.toString();
 			}
 		});
 		viewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
 		viewer.getTable().setHeaderVisible(true);
 		Composite buttonComposite = new Composite(res, SWT.NONE);
 		buttonComposite.setLayout(new GridLayout(1, false));
 		Button addButton = new Button(buttonComposite, SWT.PUSH);
 		addButton.setLayoutData(new GridData(SWT.FILL, SWT.NONE, true, false));
 		addButton.setText(Messages.PreferencesPage_Add);
 		addButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				NewContentTypeLSPLaunchDialog dialog = new NewContentTypeLSPLaunchDialog(getShell());
 				if (dialog.open() == IDialogConstants.OK_ID) {
 					workingCopy.add(new ContentTypeToLSPLaunchConfigEntry(dialog.getContentType(),
 							dialog.getLaunchConfiguration(), dialog.getLaunchMode()));
 					viewer.refresh();
 				}
 				super.widgetSelected(e);
 			}
 		});
 		removeButton = new Button(buttonComposite, SWT.PUSH);
 		removeButton.setLayoutData(new GridData(SWT.FILL, SWT.NONE, true, false));
 		removeButton.setText(Messages.PreferencesPage_Remove);
 		removeButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				ISelection sel = viewer.getSelection();
 				if (!sel.isEmpty() && sel instanceof IStructuredSelection) {
 					for (Object item : ((IStructuredSelection)sel).toArray()) {
 						workingCopy.remove(item);
 					}
 					viewer.refresh();
 				}
 			}
 		});
 		viewer.addSelectionChangedListener(event -> updateButtons());
 		viewer.setInput(workingCopy);
 		updateButtons();
 		return res;
 	}

 	private void createStaticServersTable(Composite res) {
 		Link staticServersIntro = new Link(res, SWT.WRAP);
 		GridDataFactory.swtDefaults().align(SWT.FILL, SWT.TOP).grab(true, false).span(2, 1).hint(400, SWT.DEFAULT).applyTo(staticServersIntro);
 		staticServersIntro.setText(Messages.PreferencesPage_staticServers);
 		staticServersIntro.addSelectionListener(this.contentTypeLinkListener);
 		checkboxViewer = CheckboxTableViewer.newCheckList(res, SWT.NONE);
 		checkboxViewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
 		checkboxViewer.setContentProvider(new ArrayContentProvider());

 		TableViewerColumn enablementColumn = new TableViewerColumn(checkboxViewer, SWT.NONE);
 		enablementColumn.getColumn().setText(Messages.PreferencesPage_Enabled);
 		enablementColumn.getColumn().setWidth(70);
 		enablementColumn.setLabelProvider(new ColumnLabelProvider() {
 			@Override
 			public String getText(Object element) {
 				return null;
 			}
 		});

 		TableViewerColumn contentTypeColumn = new TableViewerColumn(checkboxViewer, SWT.NONE);
 		contentTypeColumn.getColumn().setText(Messages.PreferencesPage_contentType);
 		contentTypeColumn.getColumn().setWidth(200);
 		contentTypeColumn.setLabelProvider(new ColumnLabelProvider() {
 			@Override
 			public String getText(Object element) {
 				return ((ContentTypeToLanguageServerDefinition)element).getKey().getName();
 			}
 		});

 		TableViewerColumn launchConfigColumn = new TableViewerColumn(checkboxViewer, SWT.NONE);
 		launchConfigColumn.getColumn().setText(Messages.PreferencesPage_languageServer);
 		launchConfigColumn.getColumn().setWidth(300);
 		launchConfigColumn.setLabelProvider(new ColumnLabelProvider() {
 			@Override
 			public String getText(Object element) {
 				return ((ContentTypeToLanguageServerDefinition)element).getValue().label;
 			}
 		});


 		List<ContentTypeToLanguageServerDefinition> contentTypeToLanguageServerDefinitions = registry.getContentTypeToLSPExtensions();
 		if (contentTypeToLanguageServerDefinitions.stream()
 				.anyMatch(definition -> definition.getEnablementCondition() != null)) {

 			TableViewerColumn conditionColumn = new TableViewerColumn(checkboxViewer, SWT.NONE);
 			conditionColumn.getColumn().setText(Messages.PreferencesPage_enablementCondition);
 			conditionColumn.getColumn().setWidth(150);
 			conditionColumn.setLabelProvider(new ColumnLabelProvider() {
 				@Override
 				public String getText(Object element) {
 					EnablementTester tester = ((ContentTypeToLanguageServerDefinition) element)
 							.getEnablementCondition();

 					if(tester == null) {
 						// table does not support mnemonic
 						return Action.removeMnemonics(IDialogConstants.NO_LABEL);

 					}
 					String extensionStatus = ((ContentTypeToLanguageServerDefinition) element).isExtensionEnabled()
 							? Messages.PreferencePage_enablementCondition_true
 							: Messages.PreferencePage_enablementCondition_false;
 					return tester.getDescription() + " (" + extensionStatus + ")"; //$NON-NLS-1$ //$NON-NLS-2$
 				}

 				@Override
 				public Color getBackground(Object element) {
 					EnablementTester tester = ((ContentTypeToLanguageServerDefinition) element)
 							.getEnablementCondition();
 					if (tester == null) {
 						return null;
 					}
 					Color red = Display.getDefault().getSystemColor(SWT.COLOR_RED);
 					Color green = Display.getDefault().getSystemColor(SWT.COLOR_GREEN);
 					return ((ContentTypeToLanguageServerDefinition) element).isExtensionEnabled() ? green : red;
 				}
 			});
 		}

 		checkboxViewer.setInput(contentTypeToLanguageServerDefinitions);
 		checkboxViewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1));
 		checkboxViewer.getTable().setHeaderVisible(true);
 		checkboxViewer.getTable().setLinesVisible(true);

 		this.checkboxViewer.setCheckedElements(contentTypeToLanguageServerDefinitions.stream()
 				.filter(ContentTypeToLanguageServerDefinition::isUserEnabled).toArray());

 		checkboxViewer.addCheckStateListener(event -> {
 			if (event.getElement() instanceof ContentTypeToLanguageServerDefinition) {
 				ContentTypeToLanguageServerDefinition contentTypeToLanguageServerDefinition = (ContentTypeToLanguageServerDefinition) event
 						.getElement();
 				contentTypeToLanguageServerDefinition.setUserEnabled(event.getChecked());
 				changedDefinitions.add(contentTypeToLanguageServerDefinition);
 			}
 		});
 	}

 	protected void updateButtons() {
 		this.removeButton.setEnabled(!this.viewer.getSelection().isEmpty());
 	}

 	@Override
 	public boolean performOk() {
 		this.registry.setAssociations(this.workingCopy);
 		EnableDisableLSJob enableDisableLSJob = new EnableDisableLSJob(changedDefinitions, getEditors());
 		enableDisableLSJob.schedule();
 		return super.performOk();
 	}

 	private IEditorReference[] getEditors() {
 		IWorkbenchWindow wWindow = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
 		if (wWindow != null) {
 			IWorkbenchPage wPage = wWindow.getActivePage();
 			if (wPage != null) {
 				return wPage.getEditorReferences();
 			}
 		}
 		return null;
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2016-2017 Red Hat Inc. and others.
	* This program and the accompanying materials are made
	* available under the terms of the Eclipse Public License 2.0
	* which is available at https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* Mickael Istria (Red Hat Inc.) - initial implementation
	*******************************************************************************/
	package org.eclipse.lsp4e.ui;

	import java.util.ArrayList;
	import java.util.List;

	import org.eclipse.jface.action.Action;
	import org.eclipse.jface.dialogs.IDialogConstants;
	import org.eclipse.jface.layout.GridDataFactory;
	import org.eclipse.jface.preference.PreferencePage;
	import org.eclipse.jface.viewers.ArrayContentProvider;
	import org.eclipse.jface.viewers.CheckboxTableViewer;
	import org.eclipse.jface.viewers.ColumnLabelProvider;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.TableViewer;
	import org.eclipse.jface.viewers.TableViewerColumn;
	import org.eclipse.lsp4e.ContentTypeToLSPLaunchConfigEntry;
	import org.eclipse.lsp4e.ContentTypeToLanguageServerDefinition;
	import org.eclipse.lsp4e.LanguageServersRegistry;
	import org.eclipse.lsp4e.enablement.EnablementTester;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Color;
	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.Control;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.swt.widgets.Link;
	import org.eclipse.ui.IEditorReference;
	import org.eclipse.ui.IWorkbench;
	import org.eclipse.ui.IWorkbenchPage;
	import org.eclipse.ui.IWorkbenchPreferencePage;
	import org.eclipse.ui.IWorkbenchWindow;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.preferences.IWorkbenchPreferenceContainer;

	public class LanguageServerPreferencePage extends PreferencePage implements IWorkbenchPreferencePage {

	private LanguageServersRegistry registry;
	private List<ContentTypeToLSPLaunchConfigEntry> workingCopy;
	private Button removeButton;
	private CheckboxTableViewer checkboxViewer;
	private TableViewer viewer;
	private SelectionAdapter contentTypeLinkListener;
	private List<ContentTypeToLanguageServerDefinition> changedDefinitions;

	public LanguageServerPreferencePage() {

	contentTypeLinkListener = new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	if (getContainer() instanceof IWorkbenchPreferenceContainer) {
	((IWorkbenchPreferenceContainer)getContainer()).openPage("org.eclipse.ui.preferencePages.ContentTypes", null); //$NON-NLS-1$
	}
	}
	};
	}

	@Override
	public void init(IWorkbench workbench) {
	this.changedDefinitions = new ArrayList<>();
	this.registry = LanguageServersRegistry.getInstance();
	}

	@Override
	public void setVisible(boolean visible) {
	super.setVisible(visible);
	if (visible) {
	this.checkboxViewer.refresh();
	}
	}

	@Override
	protected Control createContents(Composite parent) {
	Composite res = new Composite(parent, SWT.NONE);
	res.setLayout(new GridLayout(2, false));
	Link intro = new Link(res, SWT.WRAP);
	GridDataFactory.swtDefaults().align(SWT.FILL, SWT.TOP).grab(true, false).span(2, 1).hint(400, SWT.DEFAULT).applyTo(intro);
	intro.setText(Messages.PreferencesPage_Intro);
	intro.addSelectionListener(this.contentTypeLinkListener);

	createStaticServersTable(res);

	Link manualServersIntro = new Link(res, SWT.WRAP);
	GridDataFactory.swtDefaults().align(SWT.FILL, SWT.TOP).grab(true, false).span(2, 1).hint(400, SWT.DEFAULT).applyTo(manualServersIntro);
	manualServersIntro.setText(Messages.PreferencesPage_manualServers);
	manualServersIntro.addSelectionListener(this.contentTypeLinkListener);
	viewer = new TableViewer(res);
	viewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
	viewer.setContentProvider(new ArrayContentProvider());
	workingCopy = new ArrayList<>();
	workingCopy.addAll(LanguageServersRegistry.getInstance().getContentTypeToLSPLaunches());
	TableViewerColumn contentTypeColumn = new TableViewerColumn(viewer, SWT.NONE);
	contentTypeColumn.getColumn().setText(Messages.PreferencesPage_contentType);
	contentTypeColumn.getColumn().setWidth(200);
	contentTypeColumn.setLabelProvider(new ColumnLabelProvider() {
	@Override
	public String getText(Object element) {
	return ((ContentTypeToLanguageServerDefinition)element).getKey().getName();
	}
	});
	TableViewerColumn launchConfigColumn = new TableViewerColumn(viewer, SWT.NONE);
	launchConfigColumn.getColumn().setText(Messages.PreferencesPage_LaunchConfiguration);
	launchConfigColumn.getColumn().setWidth(300);
	launchConfigColumn.setLabelProvider(new ColumnLabelProvider() {
	@Override
	public String getText(Object element) {
	return ((ContentTypeToLSPLaunchConfigEntry)element).getLaunchConfiguration().getName();
	}
	});
	TableViewerColumn launchModeColumn = new TableViewerColumn(viewer, SWT.NONE);
	launchModeColumn.getColumn().setText(Messages.PreferencesPage_LaunchMode);
	launchModeColumn.getColumn().setWidth(100);
	launchModeColumn.setLabelProvider(new ColumnLabelProvider() {
	@Override
	public String getText(Object element) {
	StringBuilder res = new StringBuilder();
	for (String s : ((ContentTypeToLSPLaunchConfigEntry)element).getLaunchModes()) {
	res.append(s);
	res.append(',');
	}
	if (res.length() > 0) {
	res.deleteCharAt(res.length() - 1);
	}
	return res.toString();
	}
	});
	viewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
	viewer.getTable().setHeaderVisible(true);
	Composite buttonComposite = new Composite(res, SWT.NONE);
	buttonComposite.setLayout(new GridLayout(1, false));
	Button addButton = new Button(buttonComposite, SWT.PUSH);
	addButton.setLayoutData(new GridData(SWT.FILL, SWT.NONE, true, false));
	addButton.setText(Messages.PreferencesPage_Add);
	addButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	NewContentTypeLSPLaunchDialog dialog = new NewContentTypeLSPLaunchDialog(getShell());
	if (dialog.open() == IDialogConstants.OK_ID) {
	workingCopy.add(new ContentTypeToLSPLaunchConfigEntry(dialog.getContentType(),
	dialog.getLaunchConfiguration(), dialog.getLaunchMode()));
	viewer.refresh();
	}
	super.widgetSelected(e);
	}
	});
	removeButton = new Button(buttonComposite, SWT.PUSH);
	removeButton.setLayoutData(new GridData(SWT.FILL, SWT.NONE, true, false));
	removeButton.setText(Messages.PreferencesPage_Remove);
	removeButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	ISelection sel = viewer.getSelection();
	if (!sel.isEmpty() && sel instanceof IStructuredSelection) {
	for (Object item : ((IStructuredSelection)sel).toArray()) {
	workingCopy.remove(item);
	}
	viewer.refresh();
	}
	}
	});
	viewer.addSelectionChangedListener(event -> updateButtons());
	viewer.setInput(workingCopy);
	updateButtons();
	return res;
	}

	private void createStaticServersTable(Composite res) {
	Link staticServersIntro = new Link(res, SWT.WRAP);
	GridDataFactory.swtDefaults().align(SWT.FILL, SWT.TOP).grab(true, false).span(2, 1).hint(400, SWT.DEFAULT).applyTo(staticServersIntro);
	staticServersIntro.setText(Messages.PreferencesPage_staticServers);
	staticServersIntro.addSelectionListener(this.contentTypeLinkListener);
	checkboxViewer = CheckboxTableViewer.newCheckList(res, SWT.NONE);
	checkboxViewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
	checkboxViewer.setContentProvider(new ArrayContentProvider());

	TableViewerColumn enablementColumn = new TableViewerColumn(checkboxViewer, SWT.NONE);
	enablementColumn.getColumn().setText(Messages.PreferencesPage_Enabled);
	enablementColumn.getColumn().setWidth(70);
	enablementColumn.setLabelProvider(new ColumnLabelProvider() {
	@Override
	public String getText(Object element) {
	return null;
	}
	});

	TableViewerColumn contentTypeColumn = new TableViewerColumn(checkboxViewer, SWT.NONE);
	contentTypeColumn.getColumn().setText(Messages.PreferencesPage_contentType);
	contentTypeColumn.getColumn().setWidth(200);
	contentTypeColumn.setLabelProvider(new ColumnLabelProvider() {
	@Override
	public String getText(Object element) {
	return ((ContentTypeToLanguageServerDefinition)element).getKey().getName();
	}
	});

	TableViewerColumn launchConfigColumn = new TableViewerColumn(checkboxViewer, SWT.NONE);
	launchConfigColumn.getColumn().setText(Messages.PreferencesPage_languageServer);
	launchConfigColumn.getColumn().setWidth(300);
	launchConfigColumn.setLabelProvider(new ColumnLabelProvider() {
	@Override
	public String getText(Object element) {
	return ((ContentTypeToLanguageServerDefinition)element).getValue().label;
	}
	});


	List<ContentTypeToLanguageServerDefinition> contentTypeToLanguageServerDefinitions = registry.getContentTypeToLSPExtensions();
	if (contentTypeToLanguageServerDefinitions.stream()
	.anyMatch(definition -> definition.getEnablementCondition() != null)) {

	TableViewerColumn conditionColumn = new TableViewerColumn(checkboxViewer, SWT.NONE);
	conditionColumn.getColumn().setText(Messages.PreferencesPage_enablementCondition);
	conditionColumn.getColumn().setWidth(150);
	conditionColumn.setLabelProvider(new ColumnLabelProvider() {
	@Override
	public String getText(Object element) {
	EnablementTester tester = ((ContentTypeToLanguageServerDefinition) element)
	.getEnablementCondition();

	if(tester == null) {
	// table does not support mnemonic
	return Action.removeMnemonics(IDialogConstants.NO_LABEL);

	}
	String extensionStatus = ((ContentTypeToLanguageServerDefinition) element).isExtensionEnabled()
	? Messages.PreferencePage_enablementCondition_true
	: Messages.PreferencePage_enablementCondition_false;
	return tester.getDescription() + " (" + extensionStatus + ")"; //$NON-NLS-1$ //$NON-NLS-2$
	}

	@Override
	public Color getBackground(Object element) {
	EnablementTester tester = ((ContentTypeToLanguageServerDefinition) element)
	.getEnablementCondition();
	if (tester == null) {
	return null;
	}
	Color red = Display.getDefault().getSystemColor(SWT.COLOR_RED);
	Color green = Display.getDefault().getSystemColor(SWT.COLOR_GREEN);
	return ((ContentTypeToLanguageServerDefinition) element).isExtensionEnabled() ? green : red;
	}
	});
	}

	checkboxViewer.setInput(contentTypeToLanguageServerDefinitions);
	checkboxViewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1));
	checkboxViewer.getTable().setHeaderVisible(true);
	checkboxViewer.getTable().setLinesVisible(true);

	this.checkboxViewer.setCheckedElements(contentTypeToLanguageServerDefinitions.stream()
	.filter(ContentTypeToLanguageServerDefinition::isUserEnabled).toArray());

	checkboxViewer.addCheckStateListener(event -> {
	if (event.getElement() instanceof ContentTypeToLanguageServerDefinition) {
	ContentTypeToLanguageServerDefinition contentTypeToLanguageServerDefinition = (ContentTypeToLanguageServerDefinition) event
	.getElement();
	contentTypeToLanguageServerDefinition.setUserEnabled(event.getChecked());
	changedDefinitions.add(contentTypeToLanguageServerDefinition);
	}
	});
	}

	protected void updateButtons() {
	this.removeButton.setEnabled(!this.viewer.getSelection().isEmpty());
	}

	@Override
	public boolean performOk() {
	this.registry.setAssociations(this.workingCopy);
	EnableDisableLSJob enableDisableLSJob = new EnableDisableLSJob(changedDefinitions, getEditors());
	enableDisableLSJob.schedule();
	return super.performOk();
	}

	private IEditorReference[] getEditors() {
	IWorkbenchWindow wWindow = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
	if (wWindow != null) {
	IWorkbenchPage wPage = wWindow.getActivePage();
	if (wPage != null) {
	return wPage.getEditorReferences();
	}
	}
	return null;
	}

	}