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
18package com.android.mms.model;
19
20import java.io.UnsupportedEncodingException;
21
22import org.w3c.dom.events.Event;
23import org.w3c.dom.smil.ElementTime;
24
25import android.content.Context;
26import android.util.Log;
27
28import com.android.mms.LogTag;
29import com.android.mms.dom.smil.SmilMediaElementImpl;
30import com.google.android.mms.pdu.CharacterSets;
31
32public class TextModel extends RegionMediaModel {
33    private static final String TAG = LogTag.TAG;
34
35    private CharSequence mText;
36    private final int mCharset;
37
38    public TextModel(Context context, String contentType, String src, RegionModel region) {
39        this(context, contentType, src, CharacterSets.UTF_8, new byte[0], region);
40    }
41
42    public TextModel(Context context, String contentType, String src,
43            int charset, byte[] data, RegionModel region) {
44        super(context, SmilHelper.ELEMENT_TAG_TEXT, contentType, src,
45                data != null ? data : new byte[0], region);
46
47        if (charset == CharacterSets.ANY_CHARSET) {
48            // By default, we use ISO_8859_1 to decode the data
49            // which character set wasn't set.
50            charset = CharacterSets.ISO_8859_1;
51        }
52        mCharset = charset;
53        mText = extractTextFromData(data);
54    }
55
56    private CharSequence extractTextFromData(byte[] data) {
57        if (data != null) {
58            try {
59                if (CharacterSets.ANY_CHARSET == mCharset) {
60                    return new String(data); // system default encoding.
61                } else {
62                    String name = CharacterSets.getMimeName(mCharset);
63                    return new String(data, name);
64                }
65            } catch (UnsupportedEncodingException e) {
66                Log.e(TAG, "Unsupported encoding: " + mCharset, e);
67                return new String(data); // system default encoding.
68            }
69        }
70        return "";
71    }
72
73    public String getText() {
74        if (mText == null) {
75            mText = extractTextFromData(getData());
76        }
77
78        // If our internal CharSequence is not already a String,
79        // re-save it as a String so subsequent calls to getText will
80        // be less expensive.
81        if (!(mText instanceof String)) {
82            mText = mText.toString();
83        }
84
85        return mText.toString();
86    }
87
88    public void setText(CharSequence text) {
89        mText = text;
90        notifyModelChanged(true);
91    }
92
93    public void cloneText() {
94        mText = new String((mText != null ? mText.toString() : ""));
95    }
96
97    public int getCharset() {
98        return mCharset;
99    }
100
101    // EventListener Interface
102    public void handleEvent(Event evt) {
103        if (evt.getType().equals(SmilMediaElementImpl.SMIL_MEDIA_START_EVENT)) {
104            mVisible = true;
105        } else if (mFill != ElementTime.FILL_FREEZE) {
106            mVisible = false;
107        }
108
109        notifyModelChanged(false);
110    }
111}
112