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      1 /*
      2  * Copyright (C) 2008 Esmertec AG.
      3  * Copyright (C) 2008 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.model;
     19 
     20 import java.io.UnsupportedEncodingException;
     21 
     22 import org.w3c.dom.events.Event;
     23 import org.w3c.dom.smil.ElementTime;
     24 
     25 import android.content.Context;
     26 import android.util.Log;
     27 
     28 import com.android.mms.dom.smil.SmilMediaElementImpl;
     29 import com.google.android.mms.pdu.CharacterSets;
     30 
     31 public class TextModel extends RegionMediaModel {
     32     private static final String TAG = "Mms/text";
     33 
     34     private CharSequence mText;
     35     private final int mCharset;
     36 
     37     public TextModel(Context context, String contentType, String src, RegionModel region) {
     38         this(context, contentType, src, CharacterSets.UTF_8, new byte[0], region);
     39     }
     40 
     41     public TextModel(Context context, String contentType, String src,
     42             int charset, byte[] data, RegionModel region) {
     43         super(context, SmilHelper.ELEMENT_TAG_TEXT, contentType, src,
     44                 data != null ? data : new byte[0], region);
     45 
     46         if (charset == CharacterSets.ANY_CHARSET) {
     47             // By default, we use ISO_8859_1 to decode the data
     48             // which character set wasn't set.
     49             charset = CharacterSets.ISO_8859_1;
     50         }
     51         mCharset = charset;
     52         mText = extractTextFromData(data);
     53     }
     54 
     55     private CharSequence extractTextFromData(byte[] data) {
     56         if (data != null) {
     57             try {
     58                 if (CharacterSets.ANY_CHARSET == mCharset) {
     59                     return new String(data); // system default encoding.
     60                 } else {
     61                     String name = CharacterSets.getMimeName(mCharset);
     62                     return new String(data, name);
     63                 }
     64             } catch (UnsupportedEncodingException e) {
     65                 Log.e(TAG, "Unsupported encoding: " + mCharset, e);
     66                 return new String(data); // system default encoding.
     67             }
     68         }
     69         return "";
     70     }
     71 
     72     public String getText() {
     73         if (mText == null) {
     74             mText = extractTextFromData(getData());
     75         }
     76 
     77         // If our internal CharSequence is not already a String,
     78         // re-save it as a String so subsequent calls to getText will
     79         // be less expensive.
     80         if (!(mText instanceof String)) {
     81             mText = mText.toString();
     82         }
     83 
     84         return mText.toString();
     85     }
     86 
     87     public void setText(CharSequence text) {
     88         mText = text;
     89         notifyModelChanged(true);
     90     }
     91 
     92     public void cloneText() {
     93         mText = new String((mText != null ? mText.toString() : ""));
     94     }
     95 
     96     public int getCharset() {
     97         return mCharset;
     98     }
     99 
    100     // EventListener Interface
    101     public void handleEvent(Event evt) {
    102         if (evt.getType().equals(SmilMediaElementImpl.SMIL_MEDIA_START_EVENT)) {
    103             mVisible = true;
    104         } else if (mFill != ElementTime.FILL_FREEZE) {
    105             mVisible = false;
    106         }
    107 
    108         notifyModelChanged(false);
    109     }
    110 }
    111