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• TextContainer.java

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org.odftoolkit.odfdom.changes.TextContainer Maven / Gradle / Ivy

/*
 * Copyright 2012 The Apache Software Foundation.
 *
 * 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.odftoolkit.odfdom.changes;

import org.odftoolkit.odfdom.pkg.OdfElement;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Text;

/**
 * This container can be used for components including a mix of text and elements, where each
 * character and element are components. Instead of a list of this mixed components only a list of
 * the elements is being held
 *
 * @author svante.schubertATgmail.com
 */
public class TextContainer extends Component {

  public TextContainer(OdfElement componentElement, Component parent) {
    super(componentElement, parent);
  }

  public void appendText(Text text) {
    mRootElement.appendChild(text);
  }

  public void removeText(int start, int end) {
    ((TextContainingElement) mRootElement).delete(start, end);
  }

  public Node appendChild(Node node) {
    Node newNode = mRootElement.appendChild(node);
    return newNode;
  }

  /** Adds the given component to the root element */
  @Override
  public void addChild(int index, Component c) {
    mRootElement.insert(c.getRootElement(), index);
  }

  /** @return either a text node of size 1 or an element being the root element of a component */
  @Override
  public Node getChildNode(int index) {
    return ((OdfElement) mRootElement).receiveNode(index);
  }

  /**
   * @return either a text node from start index and cut after endIndex) or an element being the
   *     root element of a component
   */
  public Node getChildNode(int startIndex, int endIndex) {
    return ((OdfElement) mRootElement).receiveNode(startIndex, endIndex);
  }

  /**
   * Removes a component from the text element container. Removes either an element representing a
   * component or text node of size 1
   *
   * @returns the node being deleted, either the text node or element
   */
  @Override
  public Node remove(int index) {
    Node node = (Node) this.getChildNode(index);
    return mRootElement.removeChild(node);
  }

  /**
   * All children of the root element will be traversed. If it is a text node the size is added, if
   * it is an element and a component a size of one is added, if it is a marker, for known text
   * marker elements (text:span, text:bookmark) the children are recursive checked
   *
   * @return the number of child components
   */
  @Override
  public int size() {
    return mRootElement.componentSize();
  }

  /** Recursive traverse the text container and count the children */
  private int findChild(Node parent, int size, Node targetNode) {
    NodeList children = parent.getChildNodes();
    Node child;
    for (int i = 0; i < children.getLength(); i++) {
      child = children.item(i);
      if (child != targetNode) {
        if (child instanceof Text) {
          size += ((Text) child).getLength();
        } else if (child instanceof Element) {
          if (Component.isTextSelection(child)) {
            size = findChild(child, size, targetNode);
          } else if (child instanceof OdfElement && ((OdfElement) child).isComponentRoot()) {
            size++;
          }
          //					else if (child instanceof TextSElement) {
          //						 Integer spaceCount = ((TextSElement) child).getTextCAttribute();
          //						if(spaceCount == null){
          //							size++;
          //						}else{
          //							size += spaceCount;
          //						}
          //					}
        }
      } else {
        break;
      }
    }
    return size;
  }

  @Override
  public int indexOf(Object o) {
    Node targetNode = null;
    if (o instanceof Component) {
      targetNode = ((Component) o).getRootElement();
    } else if (o instanceof Node) {
      targetNode = (Node) o;
    }
    int position = 0;
    if (targetNode != null) {
      position += findChild(mRootElement, position, targetNode);
    }
    return position;
  }
}