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 com.android.mms.dom.smil.SmilMediaElementImpl; 21 import android.drm.mobile1.DrmException; 22 import com.android.mms.drm.DrmWrapper; 23 import com.google.android.mms.pdu.CharacterSets; 24 25 import org.w3c.dom.events.Event; 26 import org.w3c.dom.smil.ElementTime; 27 28 import android.content.Context; 29 import android.util.Log; 30 31 import java.io.IOException; 32 import java.io.UnsupportedEncodingException; 33 34 public class TextModel extends RegionMediaModel { 35 private static final String TAG = "Mms/text"; 36 37 private CharSequence mText; 38 private final int mCharset; 39 TextModel(Context context, String contentType, String src, RegionModel region)40 public TextModel(Context context, String contentType, String src, RegionModel region) { 41 this(context, contentType, src, CharacterSets.UTF_8, new byte[0], region); 42 } 43 TextModel(Context context, String contentType, String src, int charset, byte[] data, RegionModel region)44 public TextModel(Context context, String contentType, String src, 45 int charset, byte[] data, RegionModel region) { 46 super(context, SmilHelper.ELEMENT_TAG_TEXT, contentType, src, 47 data != null ? data : new byte[0], region); 48 49 if (charset == CharacterSets.ANY_CHARSET) { 50 // By default, we use ISO_8859_1 to decode the data 51 // which character set wasn't set. 52 charset = CharacterSets.ISO_8859_1; 53 } 54 mCharset = charset; 55 mText = extractTextFromData(data); 56 } 57 extractTextFromData(byte[] data)58 private CharSequence extractTextFromData(byte[] data) { 59 if (data != null) { 60 try { 61 if (CharacterSets.ANY_CHARSET == mCharset) { 62 return new String(data); // system default encoding. 63 } else { 64 String name = CharacterSets.getMimeName(mCharset); 65 return new String(data, name); 66 } 67 } catch (UnsupportedEncodingException e) { 68 Log.e(TAG, "Unsupported encoding: " + mCharset, e); 69 return new String(data); // system default encoding. 70 } 71 } 72 return ""; 73 } 74 TextModel(Context context, String contentType, String src, int charset, DrmWrapper wrapper, RegionModel regionModel)75 public TextModel(Context context, String contentType, String src, int charset, 76 DrmWrapper wrapper, RegionModel regionModel) throws IOException { 77 super(context, SmilHelper.ELEMENT_TAG_TEXT, contentType, src, wrapper, regionModel); 78 79 if (charset == CharacterSets.ANY_CHARSET) { 80 // By default, we use ISO_8859_1 to decode the data 81 // which character set wasn't set. 82 charset = CharacterSets.ISO_8859_1; 83 } 84 mCharset = charset; 85 } 86 getText()87 public String getText() { 88 if (mText == null) { 89 try { 90 mText = extractTextFromData(getData()); 91 } catch (DrmException e) { 92 Log.e(TAG, e.getMessage(), e); 93 // Display DRM error message in place. 94 mText = e.getMessage(); 95 } 96 } 97 98 // If our internal CharSequence is not already a String, 99 // re-save it as a String so subsequent calls to getText will 100 // be less expensive. 101 if (!(mText instanceof String)) { 102 mText = mText.toString(); 103 } 104 105 return mText.toString(); 106 } 107 setText(CharSequence text)108 public void setText(CharSequence text) { 109 mText = text; 110 notifyModelChanged(true); 111 } 112 cloneText()113 public void cloneText() { 114 mText = new String(mText.toString()); 115 } 116 getCharset()117 public int getCharset() { 118 return mCharset; 119 } 120 121 // EventListener Interface handleEvent(Event evt)122 public void handleEvent(Event evt) { 123 if (evt.getType().equals(SmilMediaElementImpl.SMIL_MEDIA_START_EVENT)) { 124 mVisible = true; 125 } else if (mFill != ElementTime.FILL_FREEZE) { 126 mVisible = false; 127 } 128 129 notifyModelChanged(false); 130 } 131 } 132