org.jboss.tools.jst.web.ui.internal.preferences.ELSearchPreferencePage.java Source code

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Here is the source code for org.jboss.tools.jst.web.ui.internal.preferences.ELSearchPreferencePage.java

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/*******************************************************************************
 * Copyright (c) 2012 Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is 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:
 *     Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.jboss.tools.jst.web.ui.internal.preferences;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.IOException;

import org.eclipse.jface.preference.IPersistentPreferenceStore;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;
import org.jboss.tools.common.ui.widget.editor.IFieldEditor;
import org.jboss.tools.common.ui.widget.editor.SwtFieldEditorFactory;
import org.jboss.tools.jst.web.kb.WebKbPlugin;
import org.jboss.tools.jst.web.kb.preferences.ELSearchPreferences;

/**
 * Preference page for EL Search preferences
 * 
 * @author Viacheslav Kabanovich
 *
 */
public class ELSearchPreferencePage extends PreferencePage implements IWorkbenchPreferencePage {

    private IWorkbench workbench;
    IFieldEditor timeLimit;

    @Override
    protected Control createContents(Composite parent) {
        Composite composite = new Composite(parent, SWT.NONE);
        GridLayout layout = new GridLayout(2, false);
        layout.marginWidth = 0;
        layout.marginHeight = 0;
        composite.setLayout(layout);

        timeLimit = SwtFieldEditorFactory.INSTANCE.createTextEditor("timeLimit", //$NON-NLS-1$
                Messages.ELSearchPreferencePage_searchTimeLimit,
                getPreferenceStore().getString(ELSearchPreferences.EL_SEARCH_TIME_LIMIT));
        timeLimit.doFillIntoGrid(composite);

        timeLimit.addPropertyChangeListener(new PropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent evt) {
                validate();
            }
        });
        validate();

        return composite;
    }

    public void init(IWorkbench workbench) {
        this.workbench = workbench;
    }

    protected void validate() {
        if (timeLimit == null) {
            return;
        }
        String error = null;
        String value = timeLimit.getValueAsString();
        try {
            int v = Integer.parseInt(value);
            if (v < 0) {
                error = Messages.ELSearchPreferencePage_searchTimeLimit_invalid;
            }
        } catch (NumberFormatException e) {
            error = Messages.ELSearchPreferencePage_searchTimeLimit_invalid;
        }
        setErrorMessage(error);
        setValid(error == null);
    }

    @Override
    protected void performDefaults() {
        IPreferenceStore store = getPreferenceStore();

        String defaultValue = store.getDefaultString(ELSearchPreferences.EL_SEARCH_TIME_LIMIT);
        timeLimit.setValue(defaultValue);
        store.setValue(ELSearchPreferences.EL_SEARCH_TIME_LIMIT, defaultValue);

        if (store instanceof IPersistentPreferenceStore) {
            try {
                ((IPersistentPreferenceStore) store).save();
            } catch (IOException e) {
                WebKbPlugin.getDefault().logError(e);
            }
        }

        super.performDefaults();
    }

    @Override
    public boolean performOk() {
        if (!isValid()) {
            return false;
        }
        IPreferenceStore store = getPreferenceStore();
        store.setValue(ELSearchPreferences.EL_SEARCH_TIME_LIMIT, timeLimit.getValueAsString());

        if (store instanceof IPersistentPreferenceStore) {
            try {
                ((IPersistentPreferenceStore) store).save();
            } catch (IOException e) {
                WebKbPlugin.getDefault().logError(e);
            }
        }

        return super.performOk();
    }

    protected IPreferenceStore doGetPreferenceStore() {
        return WebKbPlugin.getDefault().getPreferenceStore();
    }

}