diff options
Diffstat (limited to 'data/extensions/jsr@javascriptrestrictor/level_cache.js')
| -rw-r--r-- | data/extensions/jsr@javascriptrestrictor/level_cache.js | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/data/extensions/jsr@javascriptrestrictor/level_cache.js b/data/extensions/jsr@javascriptrestrictor/level_cache.js new file mode 100644 index 0000000..b0bef17 --- /dev/null +++ b/data/extensions/jsr@javascriptrestrictor/level_cache.js @@ -0,0 +1,143 @@ +/** \file + * \brief Handle domain-specific levels + * + * \author Copyright (C) 2020 Libor Polcak + * \author Copyright (C) 2021 Giorgio Maone + * \author Copyright (C) 2022 Marek Salon + * + * \license SPDX-License-Identifier: GPL-3.0-or-later + */ +// 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/>. +// + +/** + * Returns the a Promise which resolves to the configuration + * for the current level to be used by the content script for injection + * @param {url} string + * @param isPrivate bool specifying incognito mode + */ + + +function getContentConfiguration(url, frameId, tabId) { + return new Promise(resolve => { + function resolve_promise() { + let level = getCurrentLevelJSON(url); + if (level[0].is_default && frameId !== 0) { + /** + * \bug iframes nested within an iframe with user-specific level do not get this level + * + * Suppose that there is an iframe from domain C nested in an iframe from + * domain B that is iself nested in a visited domain A. + * + * +------------------------------------------------------------+ + * | visited domain a.example | + * | | + * | +--------------------------------------------------------+ | + * | | iframe from domain b.example | | + * | | | | + * | | +----------------------------------------------------+ | | + * | | | iframe from domain c.example | | | + * | | | | | | + * | | +----------------------------------------------------+ | | + * | | | | + * | +--------------------------------------------------------+ | + * +------------------------------------------------------------+ + * + * Suppose that B has a user-defined specific level settings, and C does + * not have a user-defined specific level settings. The iframe of domain B + * gets the user-defined settings for domain B but the iframe from domain C + * is set with the level of domain A. + */ + level = getCurrentLevelJSON(TabCache.get(tabId).url); + } + let [{wrappers}, code] = level; + let {domainHash} = Hashes.getFor(url); + if (isFpdOn(tabId)) { + if (!code) { + code = fp_generate_wrapping_code(fpdSettings.detection); + } + else { + code = fp_update_wrapping_code(code, wrappers, fpdSettings.detection); + } + } + resolve({ + currentLevel: level[0], + code, + wrappers, + domainHash + }); + } + if (levels_initialised === true) { + resolve_promise(); + } + else { + levels_updated_callbacks.push(resolve_promise); + } + }); +} + +/** + * Messaging with content script. + * + * @message The message from content script. + * + * Returns the promise with the message returned to the content script. + */ +function contentScriptLevelSetter(message, {frameId, tab}) { + switch (message.message) { + case "get wrapping for URL": + return getContentConfiguration(message.url, frameId, tab.id) + } +} +browser.runtime.onSyncMessage.addListener(contentScriptLevelSetter); + + +/** + * Register a dynamic content script to be ran for early configuration and + * injection of the wrapper, hopefully before of the asynchronous + * message listener above + * \see Depends on /nscl/service/DocStartInjection.js, /nscl/service/TabCache.js + */ + +DocStartInjection.register(async ({url, frameId, tabId}) => { + let configuration = await getContentConfiguration(url, frameId, tabId); + return ` + window.configuration = ${JSON.stringify(configuration)}; + if (typeof configureInjection === "function") configureInjection(configuration); + `; +}); + +/** + * We need to process both previous and the next URL. See + * https://pagure.io/JShelter/webextension/issue/46 and + * https://pagure.io/JShelter/webextension/issue/58 for more details. + * So far only window.name wrapper needs such information so we did not created any general + * mechanism. + * Beware that this mechanism is triggered even when the user clicks the back button while content + * scripts do not run again. + */ +NavCache.onUrlChanged.addListener(({tabId, frameId, previousUrl, url}) => { + if (getSiteForURL(previousUrl) === getSiteForURL(url)) return; + (async () => { + let configuration = await getContentConfiguration(url, frameId, tabId); + if (configuration.currentLevel.windowname) { + browser.tabs.executeScript(tabId, { + code: `window.name = "";`, + frameId, + runAt: "document_start", + matchAboutBlank: true, + }); + } + })(); +}); |