com.puppetlabs.geppetto.pp.dsl.ui.preferences.editors.GlobPatternFieldEditor.java Source code

Introduction

Here is the source code for com.puppetlabs.geppetto.pp.dsl.ui.preferences.editors.GlobPatternFieldEditor.java

Source

/**
 * Copyright (c) 2014 Puppet Labs, Inc. and other contributors, as listed below.
 * 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:
 *   Puppet Labs
 */
package com.puppetlabs.geppetto.pp.dsl.ui.preferences.editors;

import java.util.Collections;
import java.util.Set;
import java.util.StringTokenizer;

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;

import com.google.common.collect.Sets;

/**
 * A field editor to edit glob patterns.
 */
public class GlobPatternFieldEditor extends ListEditor {
    private static String mangleGlob(String glob) {
        if (glob != null) {
            glob = glob.trim();
            while (glob.startsWith("/"))
                glob = glob.substring(1).trim();
            if (glob.isEmpty())
                glob = null;
        }
        return glob;
    }

    public static Set<String> parseGlobPatterns(String filter) {
        if (filter != null) {
            filter = filter.trim();
            if (filter.length() > 0) {
                StringTokenizer st = new StringTokenizer(filter, ":\n\r");
                Set<String> v = Sets.newLinkedHashSet();
                while (st.hasMoreElements())
                    v.add(((String) st.nextElement()).trim());
                return v;
            }
        }
        return Collections.emptySet();
    }

    /**
     * Creates a glob pattern field editor.
     *
     * @param name
     *            the name of the preference this field editor works on
     * @param labelText
     *            the label text of the field editor
     * @param parent
     *            the parent of the field editor's control
     */
    public GlobPatternFieldEditor(String name, String labelText, Composite parent) {
        init(name, labelText);
        createControl(parent);
    }

    @Override
    protected String createList(String[] items) {
        if (items.length == 0)
            return "";

        StringBuffer path = new StringBuffer();
        for (int i = 0; i < items.length; i++) {
            String glob = mangleGlob(items[i]);
            if (glob == null)
                continue;
            if (path.length() > 0)
                path.append(':');
            path.append(glob);
        }
        return path.toString();
    }

    @Override
    protected String getEditedInput(String input) {
        return getInputObject("Edit Glob Pattern", input);
    }

    protected String getInputObject(String title, String input) {
        PromptDialog dialog = new PromptDialog(getShell(), SWT.SHEET);
        String[] value = new String[] { input };
        int[] okCancel = new int[] { 1 };

        dialog.prompt(title, "Glob pattern (* = any string, ? = any character, ** = any path)", null, value, null,
                okCancel);
        if (okCancel[0] == 0)
            return null;
        return value[0].trim();
    }

    @Override
    protected String getNewInputObject() {
        return getInputObject("Add Glob Pattern", null);
    }

    @Override
    protected String[] parseString(String stringList) {
        Set<String> v = parseGlobPatterns(stringList);
        return v.toArray(new String[v.size()]);
    }
}