ParagraphBehaviour.java

/**
 * Copyright 2009 Google Inc.
 *
 * Licensed 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 org.waveprotocol.wave.client.editor.content.paragraph;

import org.waveprotocol.wave.model.util.CollectionUtils;
import org.waveprotocol.wave.model.util.StringMap;
import org.waveprotocol.wave.model.util.ValueUtils;

/**
 * The many behaviours of the "paragraph" element type
 *
 * It should probably not be called paragraph any more...
 *
 * @author danilatos@google.com (Daniel Danilatos)
 */
enum ParagraphBehaviour {

  /** Normal paragraph */
  DEFAULT,
  /** Heading of some importance level or other */
  HEADING,
  /** List item */
  LIST;

  private static final StringMap<ParagraphBehaviour> subtypeMappings =
      CollectionUtils.createStringMap();

  static {
    subtypeMappings.put("p", DEFAULT);
    for (int i = 1; i <= Paragraph.NUM_HEADING_SIZES; i++) {
      subtypeMappings.put("h" + i, HEADING);
    }
    subtypeMappings.put(Paragraph.LIST_TYPE, LIST);
  }

  /**
   * @param subtype value of a paragraph's subtype attribute
   * @return the corresponding behaviour
   */
  public static ParagraphBehaviour of(String subtype) {
    ParagraphBehaviour b = subtypeMappings.get(ValueUtils.valueOrDefault(subtype, ""));
    return ValueUtils.valueOrDefault(b, DEFAULT);
  }
}