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      1 /*
      2  * Copyright (C) 2007 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.google.android.util;
     18 
     19 import android.content.Context;
     20 import android.text.Spannable;
     21 import android.text.SpannableStringBuilder;
     22 import android.text.style.ImageSpan;
     23 
     24 import java.util.ArrayList;
     25 
     26 /**
     27  * Parses a text message typed by the user looking for smileys.
     28  */
     29 public class SmileyParser extends AbstractMessageParser {
     30 
     31     private SmileyResources mRes;
     32 
     33     public SmileyParser(String text, SmileyResources res) {
     34         super(text,
     35                 true,   // smilies
     36                 false,  // acronyms
     37                 false,  // formatting
     38                 false,  // urls
     39                 false,  // music
     40                 false   // me text
     41         );
     42         mRes = res;
     43     }
     44 
     45     @Override
     46     protected Resources getResources() {
     47         return mRes;
     48     }
     49 
     50     /**
     51      * Retrieves the parsed text as a spannable string object.
     52      * @param context the context for fetching smiley resources.
     53      * @return the spannable string as CharSequence.
     54      */
     55     public CharSequence getSpannableString(Context context) {
     56         SpannableStringBuilder builder = new SpannableStringBuilder();
     57 
     58         if (getPartCount() == 0) {
     59             return "";
     60         }
     61 
     62         // should have only one part since we parse smiley only
     63         Part part = getPart(0);
     64         ArrayList<Token> tokens = part.getTokens();
     65         int len = tokens.size();
     66         for (int i = 0; i < len; i++) {
     67             Token token = tokens.get(i);
     68             int start = builder.length();
     69             builder.append(token.getRawText());
     70             if (token.getType() == AbstractMessageParser.Token.Type.SMILEY) {
     71                 int resid = mRes.getSmileyRes(token.getRawText());
     72                 if (resid != -1) {
     73                     builder.setSpan(new ImageSpan(context, resid),
     74                             start,
     75                             builder.length(),
     76                             Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
     77                 }
     78             }
     79         }
     80         return builder;
     81     }
     82 
     83 }
     84