org.eclipse.ui.internal.ide.ExtendedFileEditorsPreferencePage.java Source code

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Here is the source code for org.eclipse.ui.internal.ide.ExtendedFileEditorsPreferencePage.java

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/*******************************************************************************
 * Copyright (c) 2015 Red Hat Inc.
 * 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:
 *     Mickael Istria (Red Hat Inc.) - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.internal.ide;

import java.io.IOException;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.preference.IPersistentPreferenceStore;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.util.Policy;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ComboViewer;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.internal.dialogs.FileEditorsPreferencePage;

/**
 * @since 3.12
 *
 */
public class ExtendedFileEditorsPreferencePage extends FileEditorsPreferencePage {

    private IPreferenceStore idePreferenceStore;

    @Override
    protected Composite createContents(Composite parent) {
        Composite res = (Composite) super.createContents(parent);

        final UnassociatedEditorStrategyRegistry registry = IDEWorkbenchPlugin.getDefault()
                .getUnassociatedEditorStrategyRegistry();
        Composite defaultStrategyComposite = new Composite(res, SWT.NONE);
        defaultStrategyComposite.setLayout(new GridLayout(2, false));
        GridData layoutData = new GridData(SWT.FILL, SWT.CENTER, true, false, 2, 1);
        layoutData.verticalIndent = 20;
        defaultStrategyComposite.setLayoutData(layoutData);
        Label unknownTypeStrategyLabel = new Label(defaultStrategyComposite, SWT.NONE);
        unknownTypeStrategyLabel.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false));
        unknownTypeStrategyLabel
                .setText(IDEWorkbenchMessages.ExtendedFileEditorsPreferencePage_strategyForUnassociatedFiles);
        ComboViewer viewer = new ComboViewer(defaultStrategyComposite);
        viewer.setLabelProvider(new LabelProvider() {
            @Override
            public String getText(Object o) {
                String id = (String) o;
                String label = registry.getLabel(id);
                if (label != null) {
                    return label;
                }
                IDEWorkbenchPlugin.log("Could not resolve unknownEditorStrategy '" + id + "'"); //$NON-NLS-1$ //$NON-NLS-2$
                return NLS.bind(IDEWorkbenchMessages.ExtendedFileEditorsPreferencePage_labelNotResolved, id);
            }
        });
        viewer.setContentProvider(new ArrayContentProvider());
        viewer.setInput(registry.retrieveAllStrategies());
        this.idePreferenceStore = IDEWorkbenchPlugin.getDefault().getPreferenceStore();
        viewer.setSelection(new StructuredSelection(
                this.idePreferenceStore.getString(IDE.UNASSOCIATED_EDITOR_STRATEGY_PREFERENCE_KEY)));
        viewer.addSelectionChangedListener(new ISelectionChangedListener() {
            @Override
            public void selectionChanged(SelectionChangedEvent event) {
                idePreferenceStore.setValue(IDE.UNASSOCIATED_EDITOR_STRATEGY_PREFERENCE_KEY,
                        (String) ((IStructuredSelection) event.getSelection()).getFirstElement());
            }
        });

        return res;
    }

    @Override
    public boolean performOk() {
        if (idePreferenceStore != null && idePreferenceStore.needsSaving()
                && idePreferenceStore instanceof IPersistentPreferenceStore) {
            try {
                ((IPersistentPreferenceStore) idePreferenceStore).save();
            } catch (IOException e) {
                String message = JFaceResources.format("PreferenceDialog.saveErrorMessage", getTitle(), //$NON-NLS-1$
                        e.getMessage());
                Policy.getStatusHandler().show(new Status(IStatus.ERROR, Policy.JFACE, message, e),
                        JFaceResources.getString("PreferenceDialog.saveErrorTitle")); //$NON-NLS-1$
            }
        }
        return super.performOk();
    }

    @Override
    public void performDefaults() {
        super.performDefaults();
        idePreferenceStore.setToDefault(IDE.UNASSOCIATED_EDITOR_STRATEGY_PREFERENCE_KEY);
    }

}