aboutsummaryrefslogtreecommitdiff
path: root/ext/js/dom/sandbox
diff options
context:
space:
mode:
Diffstat (limited to 'ext/js/dom/sandbox')
-rw-r--r--ext/js/dom/sandbox/css-style-applier.js196
1 files changed, 0 insertions, 196 deletions
diff --git a/ext/js/dom/sandbox/css-style-applier.js b/ext/js/dom/sandbox/css-style-applier.js
deleted file mode 100644
index ea3f1a28..00000000
--- a/ext/js/dom/sandbox/css-style-applier.js
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
- * Copyright (C) 2023-2024 Yomitan Authors
- * Copyright (C) 2021-2022 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/>.
- */
-
-import {readResponseJson} from '../../core/json.js';
-
-/**
- * This class is used to apply CSS styles to elements using a consistent method
- * that is the same across different browsers.
- */
-export class CssStyleApplier {
- /**
- * Creates a new instance of the class.
- * @param {string} styleDataUrl The local URL to the JSON file continaing the style rules.
- * The style rules should follow the format of `CssStyleApplierRawStyleData`.
- */
- constructor(styleDataUrl) {
- /** @type {string} */
- this._styleDataUrl = styleDataUrl;
- /** @type {import('css-style-applier').CssRule[]} */
- this._styleData = [];
- /** @type {Map<string, import('css-style-applier').CssRule[]>} */
- this._cachedRules = new Map();
- /** @type {RegExp} */
- this._patternHtmlWhitespace = /[\t\r\n\f ]+/g;
- /** @type {RegExp} */
- this._patternClassNameCharacter = /[0-9a-zA-Z-_]/;
- }
-
- /**
- * Loads the data file for use.
- */
- async prepare() {
- /** @type {import('css-style-applier').RawStyleData} */
- let rawData = [];
- try {
- rawData = await this._fetchJsonAsset(this._styleDataUrl);
- } catch (e) {
- // eslint-disable-next-line no-console
- console.error(e);
- }
- const styleData = this._styleData;
- styleData.length = 0;
- for (const {selectors, styles} of rawData) {
- const selectors2 = selectors.join(',');
- const styles2 = [];
- for (const [property, value] of styles) {
- styles2.push({property, value});
- }
- styleData.push({
- selectors: selectors2,
- styles: styles2
- });
- }
- }
-
- /**
- * Applies CSS styles directly to the "style" attribute using the "class" attribute.
- * This only works for elements with a single class.
- * @param {Iterable<HTMLElement>} elements An iterable collection of HTMLElement objects.
- */
- applyClassStyles(elements) {
- const elementStyles = [];
- for (const element of elements) {
- const className = element.getAttribute('class');
- if (className === null || className.length === 0) { continue; }
- let cssTextNew = '';
- for (const {selectors, styles} of this._getCandidateCssRulesForClass(className)) {
- if (!element.matches(selectors)) { continue; }
- cssTextNew += this._getCssText(styles);
- }
- cssTextNew += element.style.cssText;
- elementStyles.push({element, style: cssTextNew});
- }
- for (const {element, style} of elementStyles) {
- element.removeAttribute('class');
- if (style.length > 0) {
- element.setAttribute('style', style);
- } else {
- element.removeAttribute('style');
- }
- }
- }
-
- // Private
-
- /**
- * Fetches and parses a JSON file.
- * @template [T=unknown]
- * @param {string} url The URL to the file.
- * @returns {Promise<T>} A JSON object.
- * @throws {Error} An error is thrown if the fetch fails.
- */
- async _fetchJsonAsset(url) {
- const response = await fetch(url, {
- method: 'GET',
- mode: 'no-cors',
- cache: 'default',
- credentials: 'omit',
- redirect: 'follow',
- referrerPolicy: 'no-referrer'
- });
- if (!response.ok) {
- throw new Error(`Failed to fetch ${url}: ${response.status}`);
- }
- return await readResponseJson(response);
- }
-
- /**
- * Gets an array of candidate CSS rules which might match a specific class.
- * @param {string} className A whitespace-separated list of classes.
- * @returns {import('css-style-applier').CssRule[]} An array of candidate CSS rules.
- */
- _getCandidateCssRulesForClass(className) {
- let rules = this._cachedRules.get(className);
- if (typeof rules !== 'undefined') { return rules; }
-
- rules = [];
- this._cachedRules.set(className, rules);
-
- const classList = this._getTokens(className);
- for (const {selectors, styles} of this._styleData) {
- if (!this._selectorMightMatch(selectors, classList)) { continue; }
- rules.push({selectors, styles});
- }
-
- return rules;
- }
-
- /**
- * Converts an array of CSS rules to a CSS string.
- * @param {import('css-style-applier').CssDeclaration[]} styles An array of CSS rules.
- * @returns {string} The CSS string.
- */
- _getCssText(styles) {
- let cssText = '';
- for (const {property, value} of styles) {
- cssText += `${property}:${value};`;
- }
- return cssText;
- }
-
- /**
- * Checks whether or not a CSS string might match at least one class in a list.
- * @param {string} selectors A CSS selector string.
- * @param {string[]} classList An array of CSS classes.
- * @returns {boolean} `true` if the selector string might match one of the classes in `classList`, false otherwise.
- */
- _selectorMightMatch(selectors, classList) {
- const pattern = this._patternClassNameCharacter;
- for (const item of classList) {
- const prefixedItem = `.${item}`;
- let start = 0;
- while (true) {
- const index = selectors.indexOf(prefixedItem, start);
- if (index < 0) { break; }
- start = index + prefixedItem.length;
- if (start >= selectors.length || !pattern.test(selectors[start])) { return true; }
- }
- }
- return false;
- }
-
- /**
- * Gets the whitespace-delimited tokens from a string.
- * @param {string} tokenListString The string to parse.
- * @returns {string[]} An array of tokens.
- */
- _getTokens(tokenListString) {
- let start = 0;
- const pattern = this._patternHtmlWhitespace;
- pattern.lastIndex = 0;
- const result = [];
- while (true) {
- const match = pattern.exec(tokenListString);
- const end = match === null ? tokenListString.length : match.index;
- if (end > start) { result.push(tokenListString.substring(start, end)); }
- if (match === null) { return result; }
- start = end + match[0].length;
- }
- }
-}