Android Open Source - android-bubble-text Linkify

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License

The source code is released under:
MIT License
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Java Source Code

package com.oliveira.bubble;
/*w  w  w .j a va  2 s .c  o m*/
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

@SuppressWarnings("unused")
public class Linkify {

    public static final Pattern USER_REGEX = Pattern.compile("@([A-Za-z0-9_]+)");
    public static final Pattern VALID_EMAIL_ADDRESS_REGEX = Pattern.compile("[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,6}", Pattern.CASE_INSENSITIVE);

    public static Entities computeEntities(String ss) {

        Entities entities = new Entities();
        Matcher matcher = USER_REGEX.matcher(ss);
        while (matcher.find()) {
            final String user = matcher.group(1);
            int i = matcher.start()-1;
            if (i == -1 || (i > 0 && Character.isWhitespace(ss.charAt(i)))) {
                entities.add(new Entity(matcher.start(), matcher.end(), user, matcher.group(), Entity.MENTION));
            }
        }

        matcher = Regex.VALID_URL.matcher(ss);
        while (matcher.find()) {
            final String _url = matcher.group();
            int i = matcher.start() - 1 + _url.indexOf(_url.trim());
            if (i == -1 || (i > 0 && Character.isWhitespace(ss.charAt(i)))) {
                String url = _url.trim();
                if (!url.startsWith("http://") && !url.startsWith("https://") && !url.startsWith("ftp://")) {
                    url = "http://" + url;
                }
                entities.add(new Entity(matcher.start(), matcher.end(), url, matcher.group(), Entity.URL));
            }
        }

        matcher = VALID_EMAIL_ADDRESS_REGEX.matcher(ss);
        while (matcher.find()) {
            final String email = matcher.group();
            int i = matcher.start()-1;
            if (i == -1 || (i > 0 && Character.isWhitespace(ss.charAt(i)))) {
                entities.add(new Entity(matcher.start(), matcher.end(), email, matcher.group(), Entity.EMAIL));
            }
        }

        return entities;
    }

    public static class Entities extends ArrayList<Entity> {

        @Override
        public boolean add(Entity a) {
            for (Entity b : this) {
                if (a.start >= b.start && a.start < b.end)
                    return false;
                if (a.end > b.start && a.end <= b.end)
                    return false;
            }
            return super.add(a);
        }

        @Override
        public boolean addAll(Collection<? extends Entity> collection) {
            for (Entity e : collection)
                add(e);
            return true;
        }

        /**
         * This works on assumptions that mPhoto.entities are grouped and
         * ordered e.g. album|album|link|link|mention|person|person|city
         * They should be cause this is what Linkify.computeEntites does
         * @param type of album that is required
         * @return Ordered array of album entites of one type
         */
        public ArrayList<Linkify.Entity> subEntities (int type) {
            ArrayList<Linkify.Entity> albums = new ArrayList<Linkify.Entity>();
            for (Linkify.Entity entity : this) {
                if (entity.type == type)
                    albums.add(entity);
            }
            return albums;
        }
    }

    public static class Entity implements Serializable {

        public static final int EMAIL = 0;
        public static final int PERSON = 1;
        public static final int URL = 2;
        public static final int ALBUM = 3;
        public static final int VENUE = 4;
        public static final int CITY = 5;
        public static final int COUNTRY = 6;
        public static final int MENTION = 7;

        public int start;
        public int end;
        public String id;
        public String text;
        public int type;

        public Entity() {}
        public Entity(int start, int end, String id, String text, int type) {
            this.start = start;
            this.end = end;
            this.id = id;
            this.text = text;
            this.type = type;
        }
    }
}
Java Source Code List
