800 lines
22 KiB
JavaScript
800 lines
22 KiB
JavaScript
/* global LZString */
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'use strict';
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const RX_NAMESPACE = new RegExp([/[\s\r\n]*/,
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/(@namespace[\s\r\n]+(?:[^\s\r\n]+[\s\r\n]+)?url\(http:\/\/.*?\);)/,
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/[\s\r\n]*/].map(rx => rx.source).join(''), 'g');
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const RX_CSS_COMMENTS = /\/\*[\s\S]*?\*\//g;
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// eslint-disable-next-line no-var
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var SLOPPY_REGEXP_PREFIX = '\0';
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// CSS transition bug workaround: since we insert styles asynchronously,
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// the browsers, especially Firefox, may apply all transitions on page load
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const CSS_TRANSITION_SUPPRESSOR = '* { transition: none !important; }';
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const RX_CSS_TRANSITION_DETECTOR = /([\s\n;/{]|-webkit-|-moz-)transition[\s\n]*:[\s\n]*(?!none)/;
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// Note, only 'var'-declared variables are visible from another extension page
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// eslint-disable-next-line no-var
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var cachedStyles = {
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list: null, // array of all styles
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byId: new Map(), // all styles indexed by id
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filters: new Map(), // filterStyles() parameters mapped to the returned results, 10k max
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regexps: new Map(), // compiled style regexps
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urlDomains: new Map(), // getDomain() results for 100 last checked urls
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needTransitionPatch: new Map(), // FF bug workaround
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mutex: {
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inProgress: true, // while getStyles() is reading IndexedDB all subsequent calls
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// (initially 'true' to prevent rogue getStyles before dbExec.initialized)
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onDone: [], // to getStyles() are queued and resolved when the first one finishes
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},
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};
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window.LZString = window.LZString || window.LZStringUnsafe;
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// eslint-disable-next-line no-var
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var [chromeLocal, chromeSync] = [
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chrome.storage.local,
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chrome.storage.sync,
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].map(storage => {
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const wrapper = {
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get(options) {
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return new Promise(resolve => {
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storage.get(options, data => resolve(data));
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});
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},
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set(data) {
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return new Promise(resolve => {
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storage.set(data, () => resolve(data));
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});
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},
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remove(keyOrKeys) {
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return new Promise(resolve => {
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storage.remove(keyOrKeys, resolve);
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});
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},
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getValue(key) {
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return wrapper.get(key).then(data => data[key]);
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},
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setValue(key, value) {
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return wrapper.set({[key]: value});
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},
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getLZValue(key) {
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return wrapper.getLZValues([key]).then(data => data[key]);
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},
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getLZValues(keys) {
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return wrapper.get(keys).then((data = {}) => {
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for (const key of keys) {
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const value = data[key];
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data[key] = value && tryJSONparse(LZString.decompressFromUTF16(value));
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}
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return data;
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});
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},
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setLZValue(key, value) {
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return wrapper.set({[key]: LZString.compressToUTF16(JSON.stringify(value))});
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}
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};
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return wrapper;
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});
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// eslint-disable-next-line no-var
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var dbExec = dbExecIndexedDB;
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dbExec.initialized = false;
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// we use chrome.storage.local fallback if IndexedDB doesn't save data,
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// which, once detected on the first run, is remembered in chrome.storage.local
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// for reliablility and in localStorage for fast synchronous access
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// (FF may block localStorage depending on its privacy options)
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do {
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const done = () => {
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cachedStyles.mutex.inProgress = false;
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getStyles().then(() => {
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dbExec.initialized = true;
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window.dispatchEvent(new Event('storageReady'));
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});
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};
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const fallback = () => {
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dbExec = dbExecChromeStorage;
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chromeLocal.set({dbInChromeStorage: true});
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localStorage.dbInChromeStorage = 'true';
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ignoreChromeError();
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done();
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};
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const fallbackSet = localStorage.dbInChromeStorage;
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if (fallbackSet === 'true' || !tryCatch(() => indexedDB)) {
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fallback();
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break;
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} else if (fallbackSet === 'false') {
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done();
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break;
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}
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chromeLocal.get('dbInChromeStorage')
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.then(data =>
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data && data.dbInChromeStorage && Promise.reject())
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.then(() =>
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tryCatch(dbExecIndexedDB, 'getAllKeys', IDBKeyRange.lowerBound(1), 1) ||
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Promise.reject())
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.then(({target}) => (
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(target.result || [])[0] ?
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Promise.reject('ok') :
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dbExecIndexedDB('put', {id: -1})))
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.then(() =>
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dbExecIndexedDB('get', -1))
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.then(({target}) => (
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(target.result || {}).id === -1 ?
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dbExecIndexedDB('delete', -1) :
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Promise.reject()))
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.then(() =>
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Promise.reject('ok'))
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.catch(result => {
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if (result === 'ok') {
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chromeLocal.set({dbInChromeStorage: false});
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localStorage.dbInChromeStorage = 'false';
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done();
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} else {
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fallback();
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}
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});
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} while (0);
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function dbExecIndexedDB(method, ...args) {
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return new Promise((resolve, reject) => {
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Object.assign(indexedDB.open('stylish', 2), {
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onsuccess(event) {
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const database = event.target.result;
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if (!method) {
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resolve(database);
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} else {
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const transaction = database.transaction(['styles'], 'readwrite');
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const store = transaction.objectStore('styles');
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Object.assign(store[method](...args), {
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onsuccess: event => resolve(event, store, transaction, database),
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onerror: reject,
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});
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}
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},
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onerror(event) {
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console.warn(event.target.error || event.target.errorCode);
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reject(event);
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},
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onupgradeneeded(event) {
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if (event.oldVersion === 0) {
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event.target.result.createObjectStore('styles', {
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keyPath: 'id',
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autoIncrement: true,
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});
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}
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},
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});
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});
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}
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function dbExecChromeStorage(method, data) {
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const STYLE_KEY_PREFIX = 'style-';
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switch (method) {
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case 'get':
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return chromeLocal.getValue(STYLE_KEY_PREFIX + data)
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.then(result => ({target: {result}}));
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case 'put':
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if (!data.id) {
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return getStyles().then(() => {
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data.id = 1;
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for (const style of cachedStyles.list) {
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data.id = Math.max(data.id, style.id + 1);
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}
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return dbExecChromeStorage('put', data);
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});
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}
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return chromeLocal.setValue(STYLE_KEY_PREFIX + data.id, data)
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.then(() => (chrome.runtime.lastError ? Promise.reject() : data.id));
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case 'delete':
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return chromeLocal.remove(STYLE_KEY_PREFIX + data);
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case 'getAll':
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return chromeLocal.get(null).then(storage => {
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const styles = [];
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for (const key in storage) {
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if (key.startsWith(STYLE_KEY_PREFIX) &&
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Number(key.substr(STYLE_KEY_PREFIX.length))) {
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styles.push(storage[key]);
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}
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}
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return {target: {result: styles}};
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});
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}
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return Promise.reject();
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}
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function getStyles(options) {
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if (cachedStyles.list) {
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return Promise.resolve(filterStyles(options));
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}
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if (cachedStyles.mutex.inProgress) {
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return new Promise(resolve => {
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cachedStyles.mutex.onDone.push({options, resolve});
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});
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}
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cachedStyles.mutex.inProgress = true;
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return dbExec('getAll').then(event => {
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cachedStyles.list = event.target.result || [];
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cachedStyles.byId.clear();
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for (const style of cachedStyles.list) {
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cachedStyles.byId.set(style.id, style);
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if (!style.name) {
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style.name = 'ID: ' + style.id;
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}
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}
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cachedStyles.mutex.inProgress = false;
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for (const {options, resolve} of cachedStyles.mutex.onDone) {
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resolve(filterStyles(options));
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}
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cachedStyles.mutex.onDone = [];
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return filterStyles(options);
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});
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}
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function filterStyles({
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enabled = null,
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id = null,
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matchUrl = null,
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md5Url = null,
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asHash = null,
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strictRegexp = true, // used by the popup to detect bad regexps
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} = {}) {
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enabled = enabled === null || typeof enabled === 'boolean' ? enabled :
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typeof enabled === 'string' ? enabled === 'true' : null;
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id = id === null ? null : Number(id);
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if (
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enabled === null &&
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id === null &&
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matchUrl === null &&
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md5Url === null &&
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asHash !== true
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) {
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return cachedStyles.list;
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}
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if (matchUrl && !URLS.supported(matchUrl)) {
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return asHash ? {} : [];
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}
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const blankHash = asHash && {
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disableAll: prefs.get('disableAll'),
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exposeIframes: prefs.get('exposeIframes'),
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};
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const cacheKey = [enabled, id, matchUrl, md5Url, asHash, strictRegexp].join('\t');
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const cached = cachedStyles.filters.get(cacheKey);
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if (cached) {
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cached.hits++;
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cached.lastHit = Date.now();
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return asHash
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? Object.assign(blankHash, cached.styles)
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: cached.styles;
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}
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return filterStylesInternal({
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enabled,
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id,
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matchUrl,
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md5Url,
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asHash,
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strictRegexp,
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blankHash,
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cacheKey,
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});
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}
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function filterStylesInternal({
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// js engines don't like big functions (V8 often deoptimized the original filterStyles)
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// it also makes sense to extract the less frequently executed code
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enabled,
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id,
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matchUrl,
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md5Url,
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asHash,
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strictRegexp,
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blankHash,
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cacheKey,
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}) {
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if (matchUrl && !cachedStyles.urlDomains.has(matchUrl)) {
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cachedStyles.urlDomains.set(matchUrl, getDomains(matchUrl));
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for (let i = cachedStyles.urlDomains.size - 100; i > 0; i--) {
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const firstKey = cachedStyles.urlDomains.keys().next().value;
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cachedStyles.urlDomains.delete(firstKey);
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}
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}
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const styles = id === null
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? cachedStyles.list
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: [cachedStyles.byId.get(id)];
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if (!styles[0]) {
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// may happen when users [accidentally] reopen an old URL
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// of edit.html with a non-existent style id parameter
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return asHash ? blankHash : [];
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}
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const filtered = asHash ? {} : [];
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const needSections = asHash || matchUrl !== null;
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const matchUrlBase = matchUrl && matchUrl.includes('#') && matchUrl.split('#', 1)[0];
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let style;
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for (let i = 0; (style = styles[i]); i++) {
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if ((enabled === null || style.enabled === enabled)
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&& (md5Url === null || style.md5Url === md5Url)
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&& (id === null || style.id === id)) {
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const sections = needSections &&
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getApplicableSections({
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style,
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matchUrl,
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strictRegexp,
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stopOnFirst: !asHash,
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skipUrlCheck: true,
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matchUrlBase,
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});
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if (asHash) {
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if (sections.length) {
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filtered[style.id] = sections;
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}
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} else if (matchUrl === null || sections.length) {
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filtered.push(style);
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}
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}
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}
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cachedStyles.filters.set(cacheKey, {
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styles: filtered,
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lastHit: Date.now(),
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hits: 1,
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});
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if (cachedStyles.filters.size > 10000) {
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cleanupCachedFilters();
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}
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// a shallow copy is needed because the cache doesn't store options like disableAll
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return asHash
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? Object.assign(blankHash, filtered)
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: filtered;
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}
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function saveStyle(style) {
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const id = Number(style.id) || null;
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const reason = style.reason;
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const notify = style.notify !== false;
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delete style.method;
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delete style.reason;
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delete style.notify;
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if (!style.name) {
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delete style.name;
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}
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let existed;
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let codeIsUpdated;
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return maybeCalcDigest()
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.then(maybeImportFix)
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.then(decide);
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function maybeCalcDigest() {
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if (['install', 'update', 'update-digest'].includes(reason)) {
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return calcStyleDigest(style).then(digest => {
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style.originalDigest = digest;
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});
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}
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return Promise.resolve();
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}
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function maybeImportFix() {
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if (reason === 'import') {
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style.originalDigest = style.originalDigest || style.styleDigest; // TODO: remove in the future
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delete style.styleDigest; // TODO: remove in the future
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if (typeof style.originalDigest !== 'string' || style.originalDigest.length !== 40) {
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delete style.originalDigest;
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}
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}
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}
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function decide() {
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if (id !== null) {
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// Update or create
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style.id = id;
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return dbExec('get', id).then((event, store) => {
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const oldStyle = event.target.result;
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existed = Boolean(oldStyle);
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if (reason === 'update-digest' && oldStyle.originalDigest === style.originalDigest) {
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return style;
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}
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codeIsUpdated = !existed || 'sections' in style && !styleSectionsEqual(style, oldStyle);
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style = Object.assign({installDate: Date.now()}, oldStyle, style);
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return write(style, store);
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});
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} else {
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// Create
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delete style.id;
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style = Object.assign({
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// Set optional things if they're undefined
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enabled: true,
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updateUrl: null,
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md5Url: null,
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url: null,
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originalMd5: null,
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}, style);
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return write(style);
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}
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}
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function write(style, store) {
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style.sections = normalizeStyleSections(style);
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if (store) {
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return new Promise(resolve => {
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store.put(style).onsuccess = event => resolve(done(event));
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});
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} else {
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return dbExec('put', style).then(done);
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}
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}
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function done(event) {
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if (reason === 'update-digest') {
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return style;
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}
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style.id = style.id || event.target.result;
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invalidateCache(existed ? {updated: style} : {added: style});
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if (notify) {
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notifyAllTabs({
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method: existed ? 'styleUpdated' : 'styleAdded',
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style, codeIsUpdated, reason,
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});
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}
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return style;
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}
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}
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function deleteStyle({id, notify = true}) {
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id = Number(id);
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return dbExec('delete', id).then(() => {
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invalidateCache({deletedId: id});
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if (notify) {
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notifyAllTabs({method: 'styleDeleted', id});
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}
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return id;
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});
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}
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function getApplicableSections({
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style,
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matchUrl,
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strictRegexp = true,
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// filterStylesInternal() sets the following to avoid recalc on each style:
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stopOnFirst,
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skipUrlCheck,
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matchUrlBase = matchUrl.includes('#') && matchUrl.split('#', 1)[0],
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// as per spec the fragment portion is ignored in @-moz-document:
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// https://www.w3.org/TR/2012/WD-css3-conditional-20120911/#url-of-doc
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// but the spec is outdated and doesn't account for SPA sites
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// so we only respect it in case of url("http://exact.url/without/hash")
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}) {
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if (!skipUrlCheck && !URLS.supported(matchUrl)) {
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return [];
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}
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const sections = [];
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for (const section of style.sections) {
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const {urls, domains, urlPrefixes, regexps, code} = section;
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const isGlobal = !urls.length && !urlPrefixes.length && !domains.length && !regexps.length;
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const isMatching = !isGlobal && (
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urls.length
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&& (urls.includes(matchUrl) || matchUrlBase && urls.includes(matchUrlBase))
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|| urlPrefixes.length
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&& arraySomeIsPrefix(urlPrefixes, matchUrl)
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|| domains.length
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&& arraySomeIn(cachedStyles.urlDomains.get(matchUrl) || getDomains(matchUrl), domains)
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|| regexps.length
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&& arraySomeMatches(regexps, matchUrl, strictRegexp));
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if (isGlobal && !styleCodeEmpty(code) || isMatching) {
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sections.push(section);
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if (stopOnFirst) {
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break;
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}
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}
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}
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return sections;
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function arraySomeIsPrefix(array, string) {
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for (const prefix of array) {
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if (string.startsWith(prefix)) {
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return true;
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}
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}
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return false;
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}
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function arraySomeIn(array, haystack) {
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for (const el of array) {
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if (haystack.indexOf(el) >= 0) {
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return true;
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}
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}
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return false;
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}
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function arraySomeMatches(array, matchUrl, strictRegexp) {
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for (const regexp of array) {
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for (let pass = 1; pass <= (strictRegexp ? 1 : 2); pass++) {
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const cacheKey = pass === 1 ? regexp : SLOPPY_REGEXP_PREFIX + regexp;
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let rx = cachedStyles.regexps.get(cacheKey);
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if (rx === false) {
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// invalid regexp
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break;
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}
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if (!rx) {
|
|
const anchored = pass === 1 ? '^(?:' + regexp + ')$' : '^' + regexp + '$';
|
|
rx = tryRegExp(anchored);
|
|
cachedStyles.regexps.set(cacheKey, rx || false);
|
|
if (!rx) {
|
|
// invalid regexp
|
|
break;
|
|
}
|
|
}
|
|
if (rx.test(matchUrl)) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
|
|
function styleCodeEmpty(code) {
|
|
// Collect the global section if it's not empty, not comment-only, not namespace-only.
|
|
const cmtOpen = code && code.indexOf('/*');
|
|
if (cmtOpen >= 0) {
|
|
const cmtCloseLast = code.lastIndexOf('*/');
|
|
if (cmtCloseLast < 0) {
|
|
code = code.substr(0, cmtOpen);
|
|
} else {
|
|
code = code.substr(0, cmtOpen) +
|
|
code.substring(cmtOpen, cmtCloseLast + 2).replace(RX_CSS_COMMENTS, '') +
|
|
code.substr(cmtCloseLast + 2);
|
|
}
|
|
}
|
|
return !code
|
|
|| !code.trim()
|
|
|| code.includes('@namespace') && !code.replace(RX_NAMESPACE, '').trim();
|
|
}
|
|
|
|
|
|
function styleSectionsEqual({sections: a}, {sections: b}) {
|
|
if (!a || !b) {
|
|
return undefined;
|
|
}
|
|
if (a.length !== b.length) {
|
|
return false;
|
|
}
|
|
// order of sections should be identical to account for the case of multiple
|
|
// sections matching the same URL because the order of rules is part of cascading
|
|
return a.every((sectionA, index) => propertiesEqual(sectionA, b[index]));
|
|
|
|
function propertiesEqual(secA, secB) {
|
|
for (const name of ['urlPrefixes', 'urls', 'domains', 'regexps']) {
|
|
if (!equalOrEmpty(secA[name], secB[name], 'every', arrayMirrors)) {
|
|
return false;
|
|
}
|
|
}
|
|
return equalOrEmpty(secA.code, secB.code, 'substr', (a, b) => a === b);
|
|
}
|
|
|
|
function equalOrEmpty(a, b, telltale, comparator) {
|
|
const typeA = a && typeof a[telltale] === 'function';
|
|
const typeB = b && typeof b[telltale] === 'function';
|
|
return (
|
|
(a === null || a === undefined || (typeA && !a.length)) &&
|
|
(b === null || b === undefined || (typeB && !b.length))
|
|
) || typeA && typeB && a.length === b.length && comparator(a, b);
|
|
}
|
|
|
|
function arrayMirrors(array1, array2) {
|
|
return (
|
|
array1.every(el => array2.includes(el)) &&
|
|
array2.every(el => array1.includes(el))
|
|
);
|
|
}
|
|
}
|
|
|
|
|
|
function invalidateCache({added, updated, deletedId} = {}) {
|
|
if (!cachedStyles.list) {
|
|
return;
|
|
}
|
|
const id = added ? added.id : updated ? updated.id : deletedId;
|
|
const cached = cachedStyles.byId.get(id);
|
|
if (updated) {
|
|
if (cached) {
|
|
Object.assign(cached, updated);
|
|
cachedStyles.filters.clear();
|
|
cachedStyles.needTransitionPatch.delete(id);
|
|
return;
|
|
} else {
|
|
added = updated;
|
|
}
|
|
}
|
|
if (added) {
|
|
if (!cached) {
|
|
cachedStyles.list.push(added);
|
|
cachedStyles.byId.set(added.id, added);
|
|
cachedStyles.filters.clear();
|
|
cachedStyles.needTransitionPatch.delete(id);
|
|
}
|
|
return;
|
|
}
|
|
if (deletedId !== undefined) {
|
|
if (cached) {
|
|
const cachedIndex = cachedStyles.list.indexOf(cached);
|
|
cachedStyles.list.splice(cachedIndex, 1);
|
|
cachedStyles.byId.delete(deletedId);
|
|
cachedStyles.filters.clear();
|
|
cachedStyles.needTransitionPatch.delete(id);
|
|
return;
|
|
}
|
|
}
|
|
cachedStyles.list = null;
|
|
cachedStyles.filters.clear();
|
|
cachedStyles.needTransitionPatch.clear(id);
|
|
}
|
|
|
|
|
|
function cleanupCachedFilters({force = false} = {}) {
|
|
if (!force) {
|
|
debounce(cleanupCachedFilters, 1000, {force: true});
|
|
return;
|
|
}
|
|
const size = cachedStyles.filters.size;
|
|
const oldestHit = cachedStyles.filters.values().next().value.lastHit;
|
|
const now = Date.now();
|
|
const timeSpan = now - oldestHit;
|
|
const recencyWeight = 5 / size;
|
|
const hitWeight = 1 / 4; // we make ~4 hits per URL
|
|
const lastHitWeight = 10;
|
|
// delete the oldest 10%
|
|
[...cachedStyles.filters.entries()]
|
|
.map(([id, v], index) => ({
|
|
id,
|
|
weight:
|
|
index * recencyWeight +
|
|
v.hits * hitWeight +
|
|
(v.lastHit - oldestHit) / timeSpan * lastHitWeight,
|
|
}))
|
|
.sort((a, b) => a.weight - b.weight)
|
|
.slice(0, size / 10 + 1)
|
|
.forEach(({id}) => cachedStyles.filters.delete(id));
|
|
}
|
|
|
|
|
|
function getDomains(url) {
|
|
let d = /.*?:\/*([^/:]+)|$/.exec(url)[1];
|
|
if (!d || url.startsWith('file:')) {
|
|
return [];
|
|
}
|
|
const domains = [d];
|
|
while (d.indexOf('.') !== -1) {
|
|
d = d.substring(d.indexOf('.') + 1);
|
|
domains.push(d);
|
|
}
|
|
return domains;
|
|
}
|
|
|
|
|
|
function normalizeStyleSections({sections}) {
|
|
// retain known properties in an arbitrarily predefined order
|
|
return (sections || []).map(section => ({
|
|
code: section.code || '',
|
|
urls: section.urls || [],
|
|
urlPrefixes: section.urlPrefixes || [],
|
|
domains: section.domains || [],
|
|
regexps: section.regexps || [],
|
|
}));
|
|
}
|
|
|
|
|
|
function calcStyleDigest(style) {
|
|
const jsonString = style.usercssData ?
|
|
style.sourceCode : JSON.stringify(normalizeStyleSections(style));
|
|
const text = new TextEncoder('utf-8').encode(jsonString);
|
|
return crypto.subtle.digest('SHA-1', text).then(hex);
|
|
|
|
function hex(buffer) {
|
|
const parts = [];
|
|
const PAD8 = '00000000';
|
|
const view = new DataView(buffer);
|
|
for (let i = 0; i < view.byteLength; i += 4) {
|
|
parts.push((PAD8 + view.getUint32(i).toString(16)).slice(-8));
|
|
}
|
|
return parts.join('');
|
|
}
|
|
}
|
|
|
|
|
|
function handleCssTransitionBug({tabId, frameId, url, styles}) {
|
|
for (let id in styles) {
|
|
id |= 0;
|
|
if (!id) {
|
|
continue;
|
|
}
|
|
let need = cachedStyles.needTransitionPatch.get(id);
|
|
if (need === false) {
|
|
continue;
|
|
}
|
|
if (need !== true) {
|
|
need = styles[id].some(sectionContainsTransitions);
|
|
cachedStyles.needTransitionPatch.set(id, need);
|
|
if (!need) {
|
|
continue;
|
|
}
|
|
}
|
|
if (FIREFOX && !url.startsWith(URLS.ownOrigin)) {
|
|
patchFirefox();
|
|
} else {
|
|
styles.needTransitionPatch = true;
|
|
}
|
|
break;
|
|
}
|
|
|
|
function patchFirefox() {
|
|
const options = {
|
|
frameId,
|
|
code: CSS_TRANSITION_SUPPRESSOR,
|
|
matchAboutBlank: true,
|
|
};
|
|
if (FIREFOX >= 53) {
|
|
options.cssOrigin = 'user';
|
|
}
|
|
browser.tabs.insertCSS(tabId, Object.assign(options, {
|
|
runAt: 'document_start',
|
|
})).then(() => setTimeout(() => {
|
|
browser.tabs.removeCSS(tabId, options).catch(ignoreChromeError);
|
|
})).catch(ignoreChromeError);
|
|
}
|
|
|
|
function sectionContainsTransitions(section) {
|
|
let code = section.code;
|
|
const firstTransition = code.indexOf('transition');
|
|
if (firstTransition < 0) {
|
|
return false;
|
|
}
|
|
const firstCmt = code.indexOf('/*');
|
|
// check the part before the first comment
|
|
if (firstCmt < 0 || firstTransition < firstCmt) {
|
|
if (quickCheckAround(code, firstTransition)) {
|
|
return true;
|
|
} else if (firstCmt < 0) {
|
|
return false;
|
|
}
|
|
}
|
|
// check the rest
|
|
const lastCmt = code.lastIndexOf('*/');
|
|
if (lastCmt < firstCmt) {
|
|
// the comment is unclosed and we already checked the preceding part
|
|
return false;
|
|
}
|
|
let mid = code.slice(firstCmt, lastCmt + 2);
|
|
mid = mid.indexOf('*/') === mid.length - 2 ? '' : mid.replace(RX_CSS_COMMENTS, '');
|
|
code = mid + code.slice(lastCmt + 2);
|
|
return quickCheckAround(code) || RX_CSS_TRANSITION_DETECTOR.test(code);
|
|
}
|
|
|
|
function quickCheckAround(code, pos = code.indexOf('transition')) {
|
|
return RX_CSS_TRANSITION_DETECTOR.test(code.substr(Math.max(0, pos - 10), 50));
|
|
}
|
|
}
|