Merge "Extract variables related to Emoji to a separate class." into main

import java.util.regex.Pattern;

import java.util.stream.Collectors;

/** Variables and functions that is related to Emoji. */

class EmojiHelper {

    static final CharSequence EMOJI_CAKE = "\ud83c\udf82";

    // This regex can be used to match Unicode emoji characters and character sequences. It's from

    // the official Unicode site (https://unicode.org/reports/tr51/#EBNF_and_Regex) with minor

    // changes to fit our needs. It should be updated once new emoji categories are added.

    //

    // Emoji categories that can be matched by this regex:

    // - Country flags. "\p{RI}\p{RI}" matches country flags since they always consist of 2 Unicode

    //   scalars.

    // - Single-Character Emoji. "\p{Emoji}" matches Single-Character Emojis.

    // - Emoji with modifiers. E.g. Emojis with different skin tones. "\p{Emoji}\p{EMod}" matches

    //   them.

    // - Emoji Presentation. Those are characters which can normally be drawn as either text or as

    //   Emoji. "\p{Emoji}\x{FE0F}" matches them.

    // - Emoji Keycap. E.g. Emojis for number 0 to 9. "\p{Emoji}\x{FE0F}\x{20E3}" matches them.

    // - Emoji tag sequence. "\p{Emoji}[\x{E0020}-\x{E007E}]+\x{E007F}" matches them.

    // - Emoji Zero-Width Joiner (ZWJ) Sequence. A ZWJ emoji is actually multiple emojis joined by

    //   the jointer "0x200D".

    //

    // Note: since "\p{Emoji}" also matches some ASCII characters like digits 0-9, we use

    // "\p{Emoji}&&\p{So}" to exclude them. This is the change we made from the official emoji

    // regex.

    private static final String UNICODE_EMOJI_REGEX =

            "\\p{RI}\\p{RI}|"

                    + "("

                    + "\\p{Emoji}(\\p{EMod}|\\x{FE0F}\\x{20E3}?|[\\x{E0020}-\\x{E007E}]+\\x{E007F})"

                    + "|[\\p{Emoji}&&\\p{So}]"

                    + ")"

                    + "("

                    + "\\x{200D}"

                    + "\\p{Emoji}(\\p{EMod}|\\x{FE0F}\\x{20E3}?|[\\x{E0020}-\\x{E007E}]+\\x{E007F})"

                    + "?)*";

    static final Pattern EMOJI_PATTERN = Pattern.compile(UNICODE_EMOJI_REGEX);

}

/** Functions that help creating the People tile layouts. */

public class PeopleTileViewHelper {

    /** Turns on debugging information about People Space. */

    private static final int MESSAGES_COUNT_OVERFLOW = 6;

    private static final CharSequence EMOJI_CAKE = "\ud83c\udf82";

    private static final Pattern DOUBLE_EXCLAMATION_PATTERN = Pattern.compile("[!][!]+");

    private static final Pattern DOUBLE_QUESTION_PATTERN = Pattern.compile("[?][?]+");

    private static final Pattern ANY_DOUBLE_MARK_PATTERN = Pattern.compile("[!?][!?]+");

    static final String BRIEF_PAUSE_ON_TALKBACK = "\n\n";

    // This regex can be used to match Unicode emoji characters and character sequences. It's from

    // the official Unicode site (https://unicode.org/reports/tr51/#EBNF_and_Regex) with minor

    // changes to fit our needs. It should be updated once new emoji categories are added.

    //

    // Emoji categories that can be matched by this regex:

    // - Country flags. "\p{RI}\p{RI}" matches country flags since they always consist of 2 Unicode

    //   scalars.

    // - Single-Character Emoji. "\p{Emoji}" matches Single-Character Emojis.

    // - Emoji with modifiers. E.g. Emojis with different skin tones. "\p{Emoji}\p{EMod}" matches

    //   them.

    // - Emoji Presentation. Those are characters which can normally be drawn as either text or as

    //   Emoji. "\p{Emoji}\x{FE0F}" matches them.

    // - Emoji Keycap. E.g. Emojis for number 0 to 9. "\p{Emoji}\x{FE0F}\x{20E3}" matches them.

    // - Emoji tag sequence. "\p{Emoji}[\x{E0020}-\x{E007E}]+\x{E007F}" matches them.

    // - Emoji Zero-Width Joiner (ZWJ) Sequence. A ZWJ emoji is actually multiple emojis joined by

    //   the jointer "0x200D".

    //

    // Note: since "\p{Emoji}" also matches some ASCII characters like digits 0-9, we use

    // "\p{Emoji}&&\p{So}" to exclude them. This is the change we made from the official emoji

    // regex.

    private static final String UNICODE_EMOJI_REGEX =

            "\\p{RI}\\p{RI}|"

                    + "("

                    + "\\p{Emoji}(\\p{EMod}|\\x{FE0F}\\x{20E3}?|[\\x{E0020}-\\x{E007E}]+\\x{E007F})"

                    + "|[\\p{Emoji}&&\\p{So}]"

                    + ")"

                    + "("

                    + "\\x{200D}"

                    + "\\p{Emoji}(\\p{EMod}|\\x{FE0F}\\x{20E3}?|[\\x{E0020}-\\x{E007E}]+\\x{E007F})"

                    + "?)*";

    private static final Pattern EMOJI_PATTERN = Pattern.compile(UNICODE_EMOJI_REGEX);

    public static final String EMPTY_STRING = "";

    private int mMediumVerticalPadding;

        if (status.getActivity() == ACTIVITY_BIRTHDAY

                || status.getActivity() == ACTIVITY_UPCOMING_BIRTHDAY) {

            setEmojiBackground(views, EMOJI_CAKE);

            setEmojiBackground(views, EmojiHelper.EMOJI_CAKE);

        }

        Icon statusIcon = status.getIcon();

    /** Returns emoji if {@code message} has two of the same emoji in sequence. */

    @VisibleForTesting

    CharSequence getDoubleEmoji(CharSequence message) {

        Matcher unicodeEmojiMatcher = EMOJI_PATTERN.matcher(message);

        Matcher unicodeEmojiMatcher = EmojiHelper.EMOJI_PATTERN.matcher(message);

        // Stores the start and end indices of each matched emoji.

        List<Pair<Integer, Integer>> emojiIndices = new ArrayList<>();

        // Stores each emoji text.