Sandbox script folders (#1837)

* Move scripts

* Update paths

* Fix ordering

* Simplify eslint rules

4 files changed, 896 insertions, 0 deletions

diff --git a/ext/js/templates/sandbox/template-renderer-frame-api.js b/ext/js/templates/sandbox/template-renderer-frame-api.js
new file mode 100644
index 00000000..f234c8e0
--- /dev/null
+++ b/ext/js/templates/sandbox/template-renderer-frame-api.js
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2020-2021  Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+class TemplateRendererFrameApi {
+    constructor(templateRenderer) {
+        this._templateRenderer = templateRenderer;
+        this._windowMessageHandlers = new Map([
+            ['render', {async: false, handler: this._onRender.bind(this)}],
+            ['renderMulti', {async: false, handler: this._onRenderMulti.bind(this)}],
+            ['getModifiedData', {async: false, handler: this._onGetModifiedData.bind(this)}]
+        ]);
+    }
+
+    prepare() {
+        window.addEventListener('message', this._onWindowMessage.bind(this), false);
+        this._postMessage(window.parent, 'ready', {}, null);
+    }
+
+    // Private
+
+    _onWindowMessage(e) {
+        const {source, data: {action, params, id}} = e;
+        const messageHandler = this._windowMessageHandlers.get(action);
+        if (typeof messageHandler === 'undefined') { return; }
+
+        this._onWindowMessageInner(messageHandler, action, params, source, id);
+    }
+
+    async _onWindowMessageInner({handler, async}, action, params, source, id) {
+        let response;
+        try {
+            let result = handler(params);
+            if (async) {
+                result = await result;
+            }
+            response = {result};
+        } catch (error) {
+            response = {error: this._serializeError(error)};
+        }
+
+        if (typeof id === 'undefined') { return; }
+        this._postMessage(source, `${action}.response`, response, id);
+    }
+
+    _onRender({template, data, type}) {
+        return this._templateRenderer.render(template, data, type);
+    }
+
+    _onRenderMulti({items}) {
+        return this._serializeMulti(this._templateRenderer.renderMulti(items));
+    }
+
+    _onGetModifiedData({data, type}) {
+        const result = this._templateRenderer.getModifiedData(data, type);
+        return this._clone(result);
+    }
+
+    _serializeError(error) {
+        try {
+            if (typeof error === 'object' && error !== null) {
+                return {
+                    name: error.name,
+                    message: error.message,
+                    stack: error.stack,
+                    data: error.data
+                };
+            }
+        } catch (e) {
+            // NOP
+        }
+        return {
+            value: error,
+            hasValue: true
+        };
+    }
+
+    _serializeMulti(array) {
+        for (let i = 0, ii = array.length; i < ii; ++i) {
+            const value = array[i];
+            const {error} = value;
+            if (typeof error !== 'undefined') {
+                value.error = this._serializeError(error);
+            }
+        }
+        return array;
+    }
+
+    _clone(value) {
+        return JSON.parse(JSON.stringify(value));
+    }
+
+    _postMessage(target, action, params, id) {
+        return target.postMessage({action, params, id}, '*');
+    }
+}
diff --git a/ext/js/templates/sandbox/template-renderer-frame-main.js b/ext/js/templates/sandbox/template-renderer-frame-main.js
new file mode 100644
index 00000000..bb9cac3a
--- /dev/null
+++ b/ext/js/templates/sandbox/template-renderer-frame-main.js
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2020-2021  Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/* globals
+ * AnkiNoteDataCreator
+ * CssStyleApplier
+ * JapaneseUtil
+ * TemplateRenderer
+ * TemplateRendererFrameApi
+ */
+
+(async () => {
+    const cssStyleApplier = new CssStyleApplier('/data/structured-content-style.json');
+    await cssStyleApplier.prepare();
+    const japaneseUtil = new JapaneseUtil(null);
+    const templateRenderer = new TemplateRenderer(japaneseUtil, cssStyleApplier);
+    const ankiNoteDataCreator = new AnkiNoteDataCreator(japaneseUtil);
+    templateRenderer.registerDataType('ankiNote', {
+        modifier: ({marker, commonData}) => ankiNoteDataCreator.create(marker, commonData),
+        composeData: (marker, commonData) => ({marker, commonData})
+    });
+    const templateRendererFrameApi = new TemplateRendererFrameApi(templateRenderer);
+    templateRendererFrameApi.prepare();
+})();
diff --git a/ext/js/templates/sandbox/template-renderer-media-provider.js b/ext/js/templates/sandbox/template-renderer-media-provider.js
new file mode 100644
index 00000000..114d3387
--- /dev/null
+++ b/ext/js/templates/sandbox/template-renderer-media-provider.js
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2021  Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/* global
+ * Handlebars
+ */
+
+class TemplateRendererMediaProvider {
+    constructor() {
+        this._requirements = null;
+    }
+
+    get requirements() {
+        return this._requirements;
+    }
+
+    set requirements(value) {
+        this._requirements = value;
+    }
+
+    hasMedia(root, args, namedArgs) {
+        const {media} = root;
+        const data = this._getMediaData(media, args, namedArgs);
+        return (data !== null);
+    }
+
+    getMedia(root, args, namedArgs) {
+        const {media} = root;
+        const data = this._getMediaData(media, args, namedArgs);
+        if (data !== null) {
+            const result = this._getFormattedValue(data, namedArgs);
+            if (typeof result === 'string') { return result; }
+        }
+        const defaultValue = namedArgs.default;
+        return typeof defaultValue !== 'undefined' ? defaultValue : '';
+    }
+
+    // Private
+
+    _addRequirement(value) {
+        if (this._requirements === null) { return; }
+        this._requirements.push(value);
+    }
+
+    _getFormattedValue(data, namedArgs) {
+        let {value} = data;
+        const {escape=true} = namedArgs;
+        if (escape) {
+            value = Handlebars.Utils.escapeExpression(value);
+        }
+        return value;
+    }
+
+    _getMediaData(media, args, namedArgs) {
+        const type = args[0];
+        switch (type) {
+            case 'audio': return this._getSimpleMediaData(media, 'audio');
+            case 'screenshot': return this._getSimpleMediaData(media, 'screenshot');
+            case 'clipboardImage': return this._getSimpleMediaData(media, 'clipboardImage');
+            case 'clipboardText': return this._getSimpleMediaData(media, 'clipboardText');
+            case 'selectionText': return this._getSimpleMediaData(media, 'selectionText');
+            case 'textFurigana': return this._getTextFurigana(media, args[1], namedArgs);
+            case 'dictionaryMedia': return this._getDictionaryMedia(media, args[1], namedArgs);
+            default: return null;
+        }
+    }
+
+    _getSimpleMediaData(media, type) {
+        const result = media[type];
+        if (typeof result === 'object' && result !== null) { return result; }
+        this._addRequirement({type});
+        return null;
+    }
+
+    _getDictionaryMedia(media, path, namedArgs) {
+        const {dictionaryMedia} = media;
+        const {dictionary} = namedArgs;
+        if (
+            typeof dictionaryMedia !== 'undefined' &&
+            typeof dictionary === 'string' &&
+            Object.prototype.hasOwnProperty.call(dictionaryMedia, dictionary)
+        ) {
+            const dictionaryMedia2 = dictionaryMedia[dictionary];
+            if (Object.prototype.hasOwnProperty.call(dictionaryMedia2, path)) {
+                const result = dictionaryMedia2[path];
+                if (typeof result === 'object' && result !== null) {
+                    return result;
+                }
+            }
+        }
+        this._addRequirement({
+            type: 'dictionaryMedia',
+            dictionary,
+            path
+        });
+        return null;
+    }
+
+    _getTextFurigana(media, text, namedArgs) {
+        const {readingMode=null} = namedArgs;
+        const {textFurigana} = media;
+        if (Array.isArray(textFurigana)) {
+            for (const entry of textFurigana) {
+                if (entry.text !== text || entry.readingMode !== readingMode) { continue; }
+                return entry.details;
+            }
+        }
+        this._addRequirement({
+            type: 'textFurigana',
+            text,
+            readingMode
+        });
+        return null;
+    }
+}
diff --git a/ext/js/templates/sandbox/template-renderer.js b/ext/js/templates/sandbox/template-renderer.js
new file mode 100644
index 00000000..02471c97
--- /dev/null
+++ b/ext/js/templates/sandbox/template-renderer.js
@@ -0,0 +1,620 @@
+/*
+ * Copyright (C) 2016-2021  Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/* global
+ * DictionaryDataUtil
+ * Handlebars
+ * StructuredContentGenerator
+ * TemplateRendererMediaProvider
+ */
+
+class TemplateRenderer {
+    constructor(japaneseUtil, cssStyleApplier) {
+        this._japaneseUtil = japaneseUtil;
+        this._cssStyleApplier = cssStyleApplier;
+        this._mediaProvider = new TemplateRendererMediaProvider();
+        this._cache = new Map();
+        this._cacheMaxSize = 5;
+        this._helpersRegistered = false;
+        this._stateStack = null;
+        this._dataTypes = new Map();
+        this._requirements = null;
+        this._cleanupCallbacks = null;
+        this._temporaryElement = null;
+    }
+
+    registerDataType(name, {modifier=null, composeData=null}) {
+        this._dataTypes.set(name, {modifier, composeData});
+    }
+
+    render(template, data, type) {
+        const instance = this._getTemplateInstance(template);
+        data = this._getModifiedData(data, void 0, type);
+        return this._renderTemplate(instance, data);
+    }
+
+    renderMulti(items) {
+        const results = [];
+        for (const {template, templateItems} of items) {
+            const instance = this._getTemplateInstance(template);
+            for (const {type, commonData, datas} of templateItems) {
+                for (let data of datas) {
+                    let result;
+                    try {
+                        data = this._getModifiedData(data, commonData, type);
+                        result = this._renderTemplate(instance, data);
+                        result = {result};
+                    } catch (error) {
+                        result = {error};
+                    }
+                    results.push(result);
+                }
+            }
+        }
+        return results;
+    }
+
+    getModifiedData(data, type) {
+        return this._getModifiedData(data, void 0, type);
+    }
+
+    // Private
+
+    _getTemplateInstance(template) {
+        if (!this._helpersRegistered) {
+            this._registerHelpers();
+        }
+
+        const cache = this._cache;
+        let instance = cache.get(template);
+        if (typeof instance === 'undefined') {
+            this._updateCacheSize(this._cacheMaxSize - 1);
+            instance = Handlebars.compile(template);
+            cache.set(template, instance);
+        }
+
+        return instance;
+    }
+
+    _renderTemplate(instance, data) {
+        const cleanupCallbacks = [];
+        const requirements = [];
+        try {
+            this._stateStack = [new Map()];
+            this._requirements = requirements;
+            this._mediaProvider.requirements = requirements;
+            this._cleanupCallbacks = cleanupCallbacks;
+            const result = instance(data).trim();
+            return {result, requirements};
+        } finally {
+            for (const callback of cleanupCallbacks) { callback(); }
+            this._stateStack = null;
+            this._requirements = null;
+            this._mediaProvider.requirements = null;
+            this._cleanupCallbacks = null;
+        }
+    }
+
+    _getModifiedData(data, commonData, type) {
+        if (typeof type === 'string') {
+            const typeInfo = this._dataTypes.get(type);
+            if (typeof typeInfo !== 'undefined') {
+                if (typeof commonData !== 'undefined') {
+                    const {composeData} = typeInfo;
+                    if (typeof composeData === 'function') {
+                        data = composeData(data, commonData);
+                    }
+                }
+                const {modifier} = typeInfo;
+                if (typeof modifier === 'function') {
+                    data = modifier(data);
+                }
+            }
+        }
+        return data;
+    }
+
+    _updateCacheSize(maxSize) {
+        const cache = this._cache;
+        let removeCount = cache.size - maxSize;
+        if (removeCount <= 0) { return; }
+
+        for (const key of cache.keys()) {
+            cache.delete(key);
+            if (--removeCount <= 0) { break; }
+        }
+    }
+
+    _registerHelpers() {
+        Handlebars.partials = Handlebars.templates;
+
+        const helpers = [
+            ['dumpObject',       this._dumpObject.bind(this)],
+            ['furigana',         this._furigana.bind(this)],
+            ['furiganaPlain',    this._furiganaPlain.bind(this)],
+            ['kanjiLinks',       this._kanjiLinks.bind(this)],
+            ['multiLine',        this._multiLine.bind(this)],
+            ['sanitizeCssClass', this._sanitizeCssClass.bind(this)],
+            ['regexReplace',     this._regexReplace.bind(this)],
+            ['regexMatch',       this._regexMatch.bind(this)],
+            ['mergeTags',        this._mergeTags.bind(this)],
+            ['eachUpTo',         this._eachUpTo.bind(this)],
+            ['spread',           this._spread.bind(this)],
+            ['op',               this._op.bind(this)],
+            ['get',              this._get.bind(this)],
+            ['set',              this._set.bind(this)],
+            ['scope',            this._scope.bind(this)],
+            ['property',         this._property.bind(this)],
+            ['noop',             this._noop.bind(this)],
+            ['isMoraPitchHigh',  this._isMoraPitchHigh.bind(this)],
+            ['getKanaMorae',     this._getKanaMorae.bind(this)],
+            ['typeof',           this._getTypeof.bind(this)],
+            ['join',             this._join.bind(this)],
+            ['concat',           this._concat.bind(this)],
+            ['pitchCategories',  this._pitchCategories.bind(this)],
+            ['formatGlossary',   this._formatGlossary.bind(this)],
+            ['hasMedia',         this._hasMedia.bind(this)],
+            ['getMedia',         this._getMedia.bind(this)]
+        ];
+
+        for (const [name, helper] of helpers) {
+            this._registerHelper(name, helper);
+        }
+
+        this._helpersRegistered = true;
+    }
+
+    _registerHelper(name, helper) {
+        function wrapper(...args) {
+            return helper(this, ...args);
+        }
+        Handlebars.registerHelper(name, wrapper);
+    }
+
+    _escape(text) {
+        return Handlebars.Utils.escapeExpression(text);
+    }
+
+    _dumpObject(context, options) {
+        const dump = JSON.stringify(options.fn(context), null, 4);
+        return this._escape(dump);
+    }
+
+    _furigana(context, ...args) {
+        const {expression, reading} = this._getFuriganaExpressionAndReading(context, ...args);
+        const segs = this._japaneseUtil.distributeFurigana(expression, reading);
+
+        let result = '';
+        for (const {text, reading: reading2} of segs) {
+            if (reading2.length > 0) {
+                result += `<ruby>${text}<rt>${reading2}</rt></ruby>`;
+            } else {
+                result += text;
+            }
+        }
+
+        return result;
+    }
+
+    _furiganaPlain(context, ...args) {
+        const {expression, reading} = this._getFuriganaExpressionAndReading(context, ...args);
+        const segs = this._japaneseUtil.distributeFurigana(expression, reading);
+
+        let result = '';
+        for (const {text, reading: reading2} of segs) {
+            if (reading2.length > 0) {
+                if (result.length > 0) { result += ' '; }
+                result += `${text}[${reading2}]`;
+            } else {
+                result += text;
+            }
+        }
+
+        return result;
+    }
+
+    _getFuriganaExpressionAndReading(context, ...args) {
+        const options = args[args.length - 1];
+        if (args.length >= 3) {
+            return {expression: args[0], reading: args[1]};
+        } else {
+            const {expression, reading} = options.fn(context);
+            return {expression, reading};
+        }
+    }
+
+    _kanjiLinks(context, options) {
+        const jp = this._japaneseUtil;
+        let result = '';
+        for (const c of options.fn(context)) {
+            if (jp.isCodePointKanji(c.codePointAt(0))) {
+                result += `<a href="#" class="kanji-link">${c}</a>`;
+            } else {
+                result += c;
+            }
+        }
+
+        return result;
+    }
+
+    _stringToMultiLineHtml(string) {
+        return string.split('\n').join('<br>');
+    }
+
+    _multiLine(context, options) {
+        return this._stringToMultiLineHtml(options.fn(context));
+    }
+
+    _sanitizeCssClass(context, options) {
+        return options.fn(context).replace(/[^_a-z0-9\u00a0-\uffff]/ig, '_');
+    }
+
+    _regexReplace(context, ...args) {
+        // Usage:
+        // {{#regexReplace regex string [flags]}}content{{/regexReplace}}
+        // regex: regular expression string
+        // string: string to replace
+        // flags: optional flags for regular expression
+        //   e.g. "i" for case-insensitive, "g" for replace all
+        let value = args[args.length - 1].fn(context);
+        if (args.length >= 3) {
+            try {
+                const flags = args.length > 3 ? args[2] : 'g';
+                const regex = new RegExp(args[0], flags);
+                value = value.replace(regex, args[1]);
+            } catch (e) {
+                return `${e}`;
+            }
+        }
+        return value;
+    }
+
+    _regexMatch(context, ...args) {
+        // Usage:
+        // {{#regexMatch regex [flags]}}content{{/regexMatch}}
+        // regex: regular expression string
+        // flags: optional flags for regular expression
+        //   e.g. "i" for case-insensitive, "g" for match all
+        let value = args[args.length - 1].fn(context);
+        if (args.length >= 2) {
+            try {
+                const flags = args.length > 2 ? args[1] : '';
+                const regex = new RegExp(args[0], flags);
+                const parts = [];
+                value.replace(regex, (g0) => parts.push(g0));
+                value = parts.join('');
+            } catch (e) {
+                return `${e}`;
+            }
+        }
+        return value;
+    }
+
+    _mergeTags(context, object, isGroupMode, isMergeMode) {
+        const tagSources = [];
+        if (isGroupMode || isMergeMode) {
+            for (const definition of object.definitions) {
+                tagSources.push(definition.definitionTags);
+            }
+        } else {
+            tagSources.push(object.definitionTags);
+        }
+
+        const tags = new Set();
+        for (const tagSource of tagSources) {
+            if (!Array.isArray(tagSource)) { continue; }
+            for (const tag of tagSource) {
+                tags.add(tag.name);
+            }
+        }
+
+        return [...tags].join(', ');
+    }
+
+    _eachUpTo(context, iterable, maxCount, options) {
+        if (iterable) {
+            const results = [];
+            let any = false;
+            for (const entry of iterable) {
+                any = true;
+                if (results.length >= maxCount) { break; }
+                const processedEntry = options.fn(entry);
+                results.push(processedEntry);
+            }
+            if (any) {
+                return results.join('');
+            }
+        }
+        return options.inverse(context);
+    }
+
+    _spread(context, ...args) {
+        const result = [];
+        for (let i = 0, ii = args.length - 1; i < ii; ++i) {
+            try {
+                result.push(...args[i]);
+            } catch (e) {
+                // NOP
+            }
+        }
+        return result;
+    }
+
+    _op(context, ...args) {
+        switch (args.length) {
+            case 3: return this._evaluateUnaryExpression(args[0], args[1]);
+            case 4: return this._evaluateBinaryExpression(args[0], args[1], args[2]);
+            case 5: return this._evaluateTernaryExpression(args[0], args[1], args[2], args[3]);
+            default: return void 0;
+        }
+    }
+
+    _evaluateUnaryExpression(operator, operand1) {
+        switch (operator) {
+            case '+': return +operand1;
+            case '-': return -operand1;
+            case '~': return ~operand1;
+            case '!': return !operand1;
+            default: return void 0;
+        }
+    }
+
+    _evaluateBinaryExpression(operator, operand1, operand2) {
+        switch (operator) {
+            case '+': return operand1 + operand2;
+            case '-': return operand1 - operand2;
+            case '/': return operand1 / operand2;
+            case '*': return operand1 * operand2;
+            case '%': return operand1 % operand2;
+            case '**': return operand1 ** operand2;
+            case '==': return operand1 == operand2; // eslint-disable-line eqeqeq
+            case '!=': return operand1 != operand2; // eslint-disable-line eqeqeq
+            case '===': return operand1 === operand2;
+            case '!==': return operand1 !== operand2;
+            case '<':  return operand1 < operand2;
+            case '<=': return operand1 <= operand2;
+            case '>':  return operand1 > operand2;
+            case '>=': return operand1 >= operand2;
+            case '<<': return operand1 << operand2;
+            case '>>': return operand1 >> operand2;
+            case '>>>': return operand1 >>> operand2;
+            case '&': return operand1 & operand2;
+            case '|': return operand1 | operand2;
+            case '^': return operand1 ^ operand2;
+            case '&&': return operand1 && operand2;
+            case '||': return operand1 || operand2;
+            default: return void 0;
+        }
+    }
+
+    _evaluateTernaryExpression(operator, operand1, operand2, operand3) {
+        switch (operator) {
+            case '?:': return operand1 ? operand2 : operand3;
+            default: return void 0;
+        }
+    }
+
+    _get(context, key) {
+        for (let i = this._stateStack.length; --i >= 0;) {
+            const map = this._stateStack[i];
+            if (map.has(key)) {
+                return map.get(key);
+            }
+        }
+        return void 0;
+    }
+
+    _set(context, ...args) {
+        switch (args.length) {
+            case 2:
+                {
+                    const [key, options] = args;
+                    const value = options.fn(context);
+                    this._stateStack[this._stateStack.length - 1].set(key, value);
+                }
+                break;
+            case 3:
+                {
+                    const [key, value] = args;
+                    this._stateStack[this._stateStack.length - 1].set(key, value);
+                }
+                break;
+        }
+        return '';
+    }
+
+    _scope(context, options) {
+        try {
+            this._stateStack.push(new Map());
+            return options.fn(context);
+        } finally {
+            if (this._stateStack.length > 1) {
+                this._stateStack.pop();
+            }
+        }
+    }
+
+    _property(context, ...args) {
+        const ii = args.length - 1;
+        if (ii <= 0) { return void 0; }
+
+        try {
+            let value = args[0];
+            for (let i = 1; i < ii; ++i) {
+                value = value[args[i]];
+            }
+            return value;
+        } catch (e) {
+            return void 0;
+        }
+    }
+
+    _noop(context, options) {
+        return options.fn(context);
+    }
+
+    _isMoraPitchHigh(context, index, position) {
+        return this._japaneseUtil.isMoraPitchHigh(index, position);
+    }
+
+    _getKanaMorae(context, text) {
+        return this._japaneseUtil.getKanaMorae(`${text}`);
+    }
+
+    _getTypeof(context, ...args) {
+        const ii = args.length - 1;
+        const value = (ii > 0 ? args[0] : args[ii].fn(context));
+        return typeof value;
+    }
+
+    _join(context, ...args) {
+        return args.length > 1 ? args.slice(1, args.length - 1).flat().join(args[0]) : '';
+    }
+
+    _concat(context, ...args) {
+        let result = '';
+        for (let i = 0, ii = args.length - 1; i < ii; ++i) {
+            result += args[i];
+        }
+        return result;
+    }
+
+    _pitchCategories(context, data) {
+        const {pronunciations, headwords} = data.dictionaryEntry;
+        const categories = new Set();
+        for (const {headwordIndex, pitches} of pronunciations) {
+            const {reading, wordClasses} = headwords[headwordIndex];
+            const isVerbOrAdjective = DictionaryDataUtil.isNonNounVerbOrAdjective(wordClasses);
+            for (const {position} of pitches) {
+                const category = this._japaneseUtil.getPitchCategory(reading, position, isVerbOrAdjective);
+                if (category !== null) {
+                    categories.add(category);
+                }
+            }
+        }
+        return [...categories];
+    }
+
+    _getTemporaryElement() {
+        let element = this._temporaryElement;
+        if (element === null) {
+            element = document.createElement('div');
+            this._temporaryElement = element;
+        }
+        return element;
+    }
+
+    _getHtml(node) {
+        const container = this._getTemporaryElement();
+        container.appendChild(node);
+        this._normalizeHtml(container);
+        const result = container.innerHTML;
+        container.textContent = '';
+        return result;
+    }
+
+    _normalizeHtml(root) {
+        const {ELEMENT_NODE, TEXT_NODE} = Node;
+        const treeWalker = document.createTreeWalker(root, NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_TEXT);
+        const elements = [];
+        const textNodes = [];
+        while (true) {
+            const node = treeWalker.nextNode();
+            if (node === null) { break; }
+            switch (node.nodeType) {
+                case ELEMENT_NODE:
+                    elements.push(node);
+                    break;
+                case TEXT_NODE:
+                    textNodes.push(node);
+                    break;
+            }
+        }
+        this._cssStyleApplier.applyClassStyles(elements);
+        for (const element of elements) {
+            const {dataset} = element;
+            for (const key of Object.keys(dataset)) {
+                delete dataset[key];
+            }
+        }
+        for (const textNode of textNodes) {
+            this._replaceNewlines(textNode);
+        }
+    }
+
+    _replaceNewlines(textNode) {
+        const parts = textNode.nodeValue.split('\n');
+        if (parts.length <= 1) { return; }
+        const {parentNode} = textNode;
+        if (parentNode === null) { return; }
+        const fragment = document.createDocumentFragment();
+        for (let i = 0, ii = parts.length; i < ii; ++i) {
+            if (i > 0) { fragment.appendChild(document.createElement('br')); }
+            fragment.appendChild(document.createTextNode(parts[i]));
+        }
+        parentNode.replaceChild(fragment, textNode);
+    }
+
+    _createStructuredContentGenerator(data) {
+        const mediaLoader = {
+            loadMedia: async (path, dictionary, onLoad, onUnload) => {
+                const imageUrl = this._mediaProvider.getMedia(data, ['dictionaryMedia', path], {dictionary, format: 'fileName', default: null});
+                if (imageUrl !== null) {
+                    onLoad(imageUrl);
+                    this._cleanupCallbacks.push(() => onUnload(true));
+                }
+            }
+        };
+        return new StructuredContentGenerator(mediaLoader, document);
+    }
+
+    _formatGlossary(context, dictionary, options) {
+        const data = options.data.root;
+        const content = options.fn(context);
+        if (typeof content === 'string') { return this._stringToMultiLineHtml(this._escape(content)); }
+        if (!(typeof content === 'object' && content !== null)) { return ''; }
+        switch (content.type) {
+            case 'image': return this._formatGlossaryImage(content, dictionary, data);
+            case 'structured-content': return this._formatStructuredContent(content, dictionary, data);
+        }
+        return '';
+    }
+
+    _formatGlossaryImage(content, dictionary, data) {
+        const structuredContentGenerator = this._createStructuredContentGenerator(data);
+        const node = structuredContentGenerator.createDefinitionImage(content, dictionary);
+        return this._getHtml(node);
+    }
+
+    _formatStructuredContent(content, dictionary, data) {
+        const structuredContentGenerator = this._createStructuredContentGenerator(data);
+        const node = structuredContentGenerator.createStructuredContent(content.content, dictionary);
+        return node !== null ? this._getHtml(node) : '';
+    }
+
+    _hasMedia(context, ...args) {
+        const ii = args.length - 1;
+        const options = args[ii];
+        return this._mediaProvider.hasMedia(options.data.root, args.slice(0, ii), options.hash);
+    }
+
+    _getMedia(context, ...args) {
+        const ii = args.length - 1;
+        const options = args[ii];
+        return this._mediaProvider.getMedia(options.data.root, args.slice(0, ii), options.hash);
+    }
+}