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      1 /*
      2  * Copyright (C) 2007 Esmertec AG.
      3  * Copyright (C) 2007 The Android Open Source Project
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 
     18 package com.android.mms.dom.smil;
     19 
     20 import java.util.ArrayList;
     21 
     22 import org.w3c.dom.Node;
     23 import org.w3c.dom.NodeList;
     24 import org.w3c.dom.smil.ElementSequentialTimeContainer;
     25 import org.w3c.dom.smil.ElementTime;
     26 import org.w3c.dom.smil.SMILElement;
     27 
     28 import com.android.mms.dom.NodeListImpl;
     29 
     30 public abstract class ElementSequentialTimeContainerImpl extends
     31         ElementTimeContainerImpl implements ElementSequentialTimeContainer {
     32 
     33     /*
     34      * Internal Interface
     35      */
     36 
     37     ElementSequentialTimeContainerImpl(SMILElement element) {
     38         super(element);
     39     }
     40 
     41     /*
     42      * ElementSequentialTimeContainer Interface
     43      */
     44 
     45     public NodeList getActiveChildrenAt(float instant) {
     46         NodeList allChildren = this.getTimeChildren();
     47         ArrayList<Node> nodes = new ArrayList<Node>();
     48         for (int i = 0; i < allChildren.getLength(); i++) {
     49             instant -= ((ElementTime) allChildren.item(i)).getDur();
     50             if (instant < 0) {
     51                 nodes.add(allChildren.item(i));
     52                 return new NodeListImpl(nodes);
     53             }
     54         }
     55         return new NodeListImpl(nodes);
     56     }
     57 
     58     public float getDur() {
     59         float dur = super.getDur();
     60         if (dur == 0) {
     61             NodeList children = getTimeChildren();
     62             for (int i = 0; i < children.getLength(); ++i) {
     63                 ElementTime child = (ElementTime) children.item(i);
     64                 if (child.getDur() < 0) {
     65                     // Return "indefinite" since containing a child whose duration is indefinite.
     66                     return -1.0F;
     67                 }
     68                 dur += child.getDur();
     69             }
     70         }
     71         return dur;
     72     }
     73 }
     74