/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.mms.util;
import android.content.Context;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.style.ImageSpan;
import com.android.mms.R;
import java.util.HashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* A class for annotating a CharSequence with spans to convert textual emoticons
* to graphical ones.
*/
public class SmileyParser {
// Singleton stuff
private static SmileyParser sInstance;
public static SmileyParser getInstance() { return sInstance; }
public static void init(Context context) {
sInstance = new SmileyParser(context);
}
private final Context mContext;
private final String[] mSmileyTexts;
private final Pattern mPattern;
private final HashMap<String, Integer> mSmileyToRes;
private SmileyParser(Context context) {
mContext = context;
mSmileyTexts = mContext.getResources().getStringArray(DEFAULT_SMILEY_TEXTS);
mSmileyToRes = buildSmileyToRes();
mPattern = buildPattern();
}
static class Smileys {
private static final int[] sIconIds = {
R.drawable.emo_im_happy,
R.drawable.emo_im_sad,
R.drawable.emo_im_winking,
R.drawable.emo_im_tongue_sticking_out,
R.drawable.emo_im_surprised,
R.drawable.emo_im_kissing,
R.drawable.emo_im_yelling,
R.drawable.emo_im_cool,
R.drawable.emo_im_money_mouth,
R.drawable.emo_im_foot_in_mouth,
R.drawable.emo_im_embarrassed,
R.drawable.emo_im_angel,
R.drawable.emo_im_undecided,
R.drawable.emo_im_crying,
R.drawable.emo_im_lips_are_sealed,
R.drawable.emo_im_laughing,
R.drawable.emo_im_wtf,
R.drawable.emo_im_heart,
R.drawable.emo_im_mad,
R.drawable.emo_im_smirk,
R.drawable.emo_im_pokerface
};
public static int HAPPY = 0;
public static int SAD = 1;
public static int WINKING = 2;
public static int TONGUE_STICKING_OUT = 3;
public static int SURPRISED = 4;
public static int KISSING = 5;
public static int YELLING = 6;
public static int COOL = 7;
public static int MONEY_MOUTH = 8;
public static int FOOT_IN_MOUTH = 9;
public static int EMBARRASSED = 10;
public static int ANGEL = 11;
public static int UNDECIDED = 12;
public static int CRYING = 13;
public static int LIPS_ARE_SEALED = 14;
public static int LAUGHING = 15;
public static int WTF = 16;
public static int MAD = 17;
public static int HEART = 18;
public static int SMIRK = 19;
public static int POKERFACE = 20;
public static int getSmileyResource(int which) {
return sIconIds[which];
}
}
// NOTE: if you change anything about this array, you must make the corresponding change
// to the string arrays: default_smiley_texts and default_smiley_names in res/values/arrays.xml
public static final int[] DEFAULT_SMILEY_RES_IDS = {
Smileys.getSmileyResource(Smileys.HAPPY), // 0
Smileys.getSmileyResource(Smileys.SAD), // 1
Smileys.getSmileyResource(Smileys.WINKING), // 2
Smileys.getSmileyResource(Smileys.TONGUE_STICKING_OUT), // 3
Smileys.getSmileyResource(Smileys.SURPRISED), // 4
Smileys.getSmileyResource(Smileys.KISSING), // 5
Smileys.getSmileyResource(Smileys.YELLING), // 6
Smileys.getSmileyResource(Smileys.COOL), // 7
Smileys.getSmileyResource(Smileys.MONEY_MOUTH), // 8
Smileys.getSmileyResource(Smileys.FOOT_IN_MOUTH), // 9
Smileys.getSmileyResource(Smileys.EMBARRASSED), // 10
Smileys.getSmileyResource(Smileys.ANGEL), // 11
Smileys.getSmileyResource(Smileys.UNDECIDED), // 12
Smileys.getSmileyResource(Smileys.CRYING), // 13
Smileys.getSmileyResource(Smileys.LIPS_ARE_SEALED), // 14
Smileys.getSmileyResource(Smileys.LAUGHING), // 15
Smileys.getSmileyResource(Smileys.WTF), // 16
Smileys.getSmileyResource(Smileys.MAD), // 17
Smileys.getSmileyResource(Smileys.HEART), // 18
Smileys.getSmileyResource(Smileys.SMIRK), // 19
Smileys.getSmileyResource(Smileys.POKERFACE), // 20
};
public static final int DEFAULT_SMILEY_TEXTS = R.array.default_smiley_texts;
public static final int DEFAULT_SMILEY_NAMES = R.array.default_smiley_names;
/**
* Builds the hashtable we use for mapping the string version
* of a smiley (e.g. ":-)") to a resource ID for the icon version.
*/
private HashMap<String, Integer> buildSmileyToRes() {
if (DEFAULT_SMILEY_RES_IDS.length != mSmileyTexts.length) {
// Throw an exception if someone updated DEFAULT_SMILEY_RES_IDS
// and failed to update arrays.xml
throw new IllegalStateException("Smiley resource ID/text mismatch");
}
HashMap<String, Integer> smileyToRes =
new HashMap<String, Integer>(mSmileyTexts.length);
for (int i = 0; i < mSmileyTexts.length; i++) {
smileyToRes.put(mSmileyTexts[i], DEFAULT_SMILEY_RES_IDS[i]);
}
return smileyToRes;
}
/**
* Builds the regular expression we use to find smileys in {@link #addSmileySpans}.
*/
private Pattern buildPattern() {
// Set the StringBuilder capacity with the assumption that the average
// smiley is 3 characters long.
StringBuilder patternString = new StringBuilder(mSmileyTexts.length * 3);
// Build a regex that looks like (:-)|:-(|...), but escaping the smilies
// properly so they will be interpreted literally by the regex matcher.
patternString.append('(');
for (String s : mSmileyTexts) {
patternString.append(Pattern.quote(s));
patternString.append('|');
}
// Replace the extra '|' with a ')'
patternString.replace(patternString.length() - 1, patternString.length(), ")");
return Pattern.compile(patternString.toString());
}
/**
* Adds ImageSpans to a CharSequence that replace textual emoticons such
* as :-) with a graphical version.
*
* @param text A CharSequence possibly containing emoticons
* @return A CharSequence annotated with ImageSpans covering any
* recognized emoticons.
*/
public CharSequence addSmileySpans(CharSequence text) {
SpannableStringBuilder builder = new SpannableStringBuilder(text);
Matcher matcher = mPattern.matcher(text);
while (matcher.find()) {
int resId = mSmileyToRes.get(matcher.group());
builder.setSpan(new ImageSpan(mContext, resId),
matcher.start(), matcher.end(),
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
return builder;
}
}