signal-desktop/js/emoji_util.js

/*
 * vim: ts=4:sw=4:expandtab
 */

;(function() {
    'use strict';
    window.emoji_util = window.emoji_util || {};

    // EmojiConverter overrides
    EmojiConvertor.prototype.getCountOfAllMatches = function(str, regex) {
        var match = regex.exec(str);
        var count = 0;

        if (!regex.global) {
            return match ? 1 : 0;
        }

        while (match) {
            count += 1;
            match = regex.exec(str);
        }

        return count;
    };

    EmojiConvertor.prototype.hasNormalCharacters = function(str) {
        var self = this;
        var noEmoji = str.replace(self.rx_unified, '').trim();
        return noEmoji.length > 0;
    };

    EmojiConvertor.prototype.getSizeClass = function(str) {
        var self = this;

        if (self.hasNormalCharacters(str)) {
            return '';
        }

        var emojiCount = self.getCountOfAllMatches(str, self.rx_unified);
        if (emojiCount > 8) {
            return '';
        }
        else if (emojiCount > 6) {
            return 'small';
        }
        else if (emojiCount > 4) {
            return 'medium';
        }
        else if (emojiCount > 2) {
            return 'large';
        }
        else {
            return 'jumbo';
        }
    };

    var imgClass = /(<img [^>]+ class="emoji)(")/g;
    EmojiConvertor.prototype.addClass = function(text, sizeClass) {
        if (!sizeClass) {
            return text;
        }

        return text.replace(imgClass, function(match, before, after) {
            return before + ' ' + sizeClass + after;
        });
    };

    var imgTitle = /(<img [^>]+ class="emoji[^>]+ title=")([^:">]+)(")/g;
    EmojiConvertor.prototype.ensureTitlesHaveColons = function(text) {
        return text.replace(imgTitle, function(match, before, title, after) {
            return before + ':' + title + ':' + after;
        });
    };

    EmojiConvertor.prototype.signalReplace = function(str) {
        var sizeClass = this.getSizeClass(str);

        var text = this.replace_unified(str);
        text = this.addClass(text, sizeClass);

        return this.ensureTitlesHaveColons(text);
    };

    window.emoji = new EmojiConvertor();
    emoji.init_colons();
    emoji.img_sets.apple.path = 'node_modules/emoji-datasource-apple/img/apple/64/';
    emoji.include_title = true;
    emoji.replace_mode = 'img';
    emoji.supports_css = false; // needed to avoid spans with background-image

    window.emoji_util.parse = function($el) {
        if (!$el || !$el.length) {
            return;
        }

        $el.html(emoji.signalReplace($el.html()));
    };

})();