@awesome-fe/translate/dom/subtitle/subtitle.js

Translation utils

"use strict";
var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
    if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
        if (ar || !(i in from)) {
            if (!ar) ar = Array.prototype.slice.call(from, 0, i);
            ar[i] = from[i];
        }
    }
    return to.concat(ar || Array.prototype.slice.call(from));
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.subtitle = void 0;
var subtitle;
(function (subtitle_1) {
    var SubtitleFormat;
    (function (SubtitleFormat) {
        SubtitleFormat["AUTO"] = "auto";
        SubtitleFormat["SRT"] = "srt";
        SubtitleFormat["VTT"] = "vtt";
    })(SubtitleFormat = subtitle_1.SubtitleFormat || (subtitle_1.SubtitleFormat = {}));
    function parse(text, format) {
        if (format === void 0) { format = SubtitleFormat.AUTO; }
        if (format === SubtitleFormat.AUTO) {
            return parse(text, detectFormat(text));
        }
        else if (format === SubtitleFormat.SRT || format === SubtitleFormat.VTT) {
            var _a = partition(text, format), meta = _a.meta, items = _a.items;
            return {
                meta: meta,
                items: items.map(function (segment) {
                    var _a;
                    var lines = segment.split(/\r?\n/);
                    var timeIndex = lines.findIndex(function (line) { return /\d\d:\d\d:\d\d[,.]\d\d\d --> \d\d:\d\d:\d\d[,.]\d\d\d/.test(line); });
                    var time = lines[timeIndex].split(' --> ');
                    return {
                        cue: (_a = lines[timeIndex - 1]) !== null && _a !== void 0 ? _a : '',
                        startTime: parseTime(time[0]),
                        endTime: parseTime(time[1]),
                        text: unescapeSubtitle(lines.slice(timeIndex + 1).join('\n').trim(), format),
                    };
                }),
            };
        }
    }
    subtitle_1.parse = parse;
    function stringify(subtitle, format) {
        if (format === void 0) { format = SubtitleFormat.AUTO; }
        if (format === SubtitleFormat.AUTO) {
            return stringify(subtitle, subtitle.meta.format);
        }
        else if (format === SubtitleFormat.SRT) {
            return subtitle.items.map(function (item, index) {
                return "".concat(index + 1, "\n").concat(formatTime(item.startTime, format), " --> ").concat(formatTime(item.endTime, format), "\n").concat(escapeSubtitle(item.text, format));
            }).join('\n\n');
        }
        else if (format === SubtitleFormat.VTT) {
            var meta = "".concat(['WEBVTT', escapeSubtitle(subtitle.meta.header, SubtitleFormat.VTT)].filter(function (it) { return !!it; }).join(' - '), "\nKind: ").concat(subtitle.meta.kind, "\nLanguage: ").concat(subtitle.meta.language);
            var body = subtitle.items.map(function (item, index) {
                var _a;
                return "".concat(escapeSubtitle((_a = item.cue) !== null && _a !== void 0 ? _a : '', format), "\n").concat(formatTime(item.startTime, format), " --> ").concat(formatTime(item.endTime, format), "\n").concat(escapeSubtitle(item.text, format)).trim();
            });
            return __spreadArray([meta], body, true).join('\n\n');
        }
    }
    subtitle_1.stringify = stringify;
    function detectFormat(text) {
        if (text.startsWith('WEBVTT')) {
            return SubtitleFormat.VTT;
        }
        else if (/\d\d:\d\d:\d\d,\d\d\d --> \d\d:\d\d:\d\d,\d\d\d/.test(text)) {
            return SubtitleFormat.SRT;
        }
        else {
            throw new Error('Unsupported subtitle format');
        }
    }
    function parseVttMeta(text) {
        var _a, _b;
        var lines = text.split('\n');
        var header = lines[0];
        var kind = lines[1].split(':')[1].trim();
        var language = lines[2].split(':')[1].trim();
        return {
            header: unescapeSubtitle((_b = (_a = header.split('-')[1]) === null || _a === void 0 ? void 0 : _a.trim()) !== null && _b !== void 0 ? _b : '', SubtitleFormat.VTT),
            format: SubtitleFormat.VTT,
            kind: kind,
            language: language,
        };
    }
    function partition(text, format) {
        var segments = text.split(/\r?\n\r?\n/).filter(function (it) { return !!it; });
        if (format === SubtitleFormat.SRT) {
            return {
                meta: {
                    header: '',
                    format: SubtitleFormat.SRT,
                    kind: 'captions',
                    language: 'en',
                },
                items: segments,
            };
        }
        else if (format === SubtitleFormat.VTT) {
            return {
                meta: parseVttMeta(segments[0]),
                items: segments.slice(1),
            };
        }
    }
    function parseTime(string) {
        var _a = string.split(/[:,.]/).map(function (s) { return parseInt(s, 10); }), hours = _a[0], minutes = _a[1], seconds = _a[2], milliseconds = _a[3];
        return hours * 3600000 + minutes * 60000 + seconds * 1000 + milliseconds;
    }
    function escapeSubtitle(text, format) {
        if (format === SubtitleFormat.SRT) {
            return text.replace(/\xa0/g, '\\h');
        }
        else if (format === SubtitleFormat.VTT) {
            return text
                .replace(/&/g, '&amp;')
                .replace(/</g, '&lt;')
                .replace(/>/g, '&gt;')
                .replace(/\xa0/g, '&nbsp;');
        }
    }
    function unescapeSubtitle(text, format) {
        if (format === SubtitleFormat.SRT) {
            return text.replace(/\\h/g, '\xa0').replace(/\\N/g, '\n');
        }
        else if (format === SubtitleFormat.VTT) {
            return text
                .replace(/&lt;/g, '<')
                .replace(/&gt;/g, '>')
                .replace(/&nbsp;/g, '\xa0')
                .replace(/&amp;/g, '&');
        }
    }
    function pad(value, length) {
        return value.toString().padStart(length, '0');
    }
    function formatTime(time, format) {
        var hours = Math.floor(time / 3600000);
        var minutes = Math.floor((time - hours * 3600000) / 60000);
        var seconds = Math.floor((time - hours * 3600000 - minutes * 60000) / 1000);
        var milliseconds = time - hours * 3600000 - minutes * 60000 - seconds * 1000;
        if (format === SubtitleFormat.SRT) {
            return "".concat(pad(hours, 2), ":").concat(pad(minutes, 2), ":").concat(pad(seconds, 2), ",").concat(pad(milliseconds, 3));
        }
        else if (format === SubtitleFormat.VTT) {
            return "".concat(pad(hours, 2), ":").concat(pad(minutes, 2), ":").concat(pad(seconds, 2), ".").concat(pad(milliseconds, 3));
        }
    }
})(subtitle = exports.subtitle || (exports.subtitle = {}));
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