groovy.swing.factory.EmptyBorderFactory.groovy Maven / Gradle / Ivy

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Groovy: A powerful, dynamic language for the JVM
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/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 */
package groovy.swing.factory

import javax.swing.BorderFactory

/**
 * accepts values in lieu of attributes:
 *  int - all of top, left, bottom, right
 *  [int, int, int, int] - top, left, bottom, right
 * accepts attributes when no value present:
 *  top: int, left: int, bottom: int, right: int
 *
 */
class EmptyBorderFactory extends SwingBorderFactory {

    public Object newInstance(FactoryBuilderSupport builder, Object name, Object value, Map attributes) {
        builder.context.applyBorderToParent = attributes.remove('parent')

        if (!attributes) {
            if (value instanceof Integer) {
                return BorderFactory.createEmptyBorder(value, value, value, value)
            } else if (value instanceof List && value.size() == 4) {
                // we need GDK methods on Collection for boolean .any{} and boolean .all{} :(
                boolean ints = true
                value.each {ints = ints & it instanceof Integer}
                if (ints) {
                    return BorderFactory.createEmptyBorder(*value)
                }
            }
            throw new RuntimeException("$name only accepts a single integer or an array of four integers as a value argument")
        }
        if (value == null) {
            int top = attributes.remove("top")
            int left = attributes.remove("left")
            int bottom = attributes.remove("bottom")
            int right = attributes.remove("right")
            if ((top == null) || (left == null) || (bottom == null) || (right == null) || attributes) {
                throw new RuntimeException("When $name is called it must be call with top:, left:, bottom:, right:, and no other attributes")
            }
            return BorderFactory.createEmptyBorder(top, left, bottom, right)
        }
        throw new RuntimeException("$name cannot be called with both an argulent value and attributes")
    }

}