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/*
* Copyright (C) 2023 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/>.
*/
/**
* Injects a stylesheet into a tab.
* @param {'file'|'code'} type The type of content to inject; either 'file' or 'code'.
* @param {string} content The content to inject.
* - If type is `'file'`, this argument should be a path to a file.
* - If type is `'code'`, this argument should be the CSS content.
* @param {number} tabId The id of the tab to inject into.
* @param {number|undefined} frameId The id of the frame to inject into.
* @param {boolean} allFrames Whether or not the stylesheet should be injected into all frames.
* @returns {Promise<void>}
*/
export function injectStylesheet(type, content, tabId, frameId, allFrames) {
return new Promise((resolve, reject) => {
/** @type {chrome.scripting.InjectionTarget} */
const target = {
tabId,
allFrames
};
/** @type {chrome.scripting.CSSInjection} */
const details = (
type === 'file' ?
{origin: 'AUTHOR', files: [content], target} :
{origin: 'USER', css: content, target}
);
if (!allFrames && typeof frameId === 'number') {
details.target.frameIds = [frameId];
}
chrome.scripting.insertCSS(details, () => {
const e = chrome.runtime.lastError;
if (e) {
reject(new Error(e.message));
} else {
resolve();
}
});
});
}
/**
* Checks whether or not a content script is registered.
* @param {string} id The identifier used with a call to `registerContentScript`.
* @returns {Promise<boolean>} `true` if a script is registered, `false` otherwise.
*/
export async function isContentScriptRegistered(id) {
const scripts = await new Promise((resolve, reject) => {
chrome.scripting.getRegisteredContentScripts({ids: [id]}, (result) => {
const e = chrome.runtime.lastError;
if (e) {
reject(new Error(e.message));
} else {
resolve(result);
}
});
});
for (const script of scripts) {
if (script.id === id) {
return true;
}
}
return false;
}
/**
* Registers a dynamic content script.
* Note: if the fallback handler is used and the 'webNavigation' permission isn't granted,
* there is a possibility that the script can be injected more than once due to the events used.
* Therefore, a reentrant check may need to be performed by the content script.
* @param {string} id A unique identifier for the registration.
* @param {import('script-manager').RegistrationDetails} details The script registration details.
* @throws An error is thrown if the id is already in use.
*/
export async function registerContentScript(id, details) {
if (await isContentScriptRegistered(id)) {
throw new Error('Registration already exists');
}
const details2 = createContentScriptRegistrationOptions(details, id);
await /** @type {Promise<void>} */ (new Promise((resolve, reject) => {
chrome.scripting.registerContentScripts([details2], () => {
const e = chrome.runtime.lastError;
if (e) {
reject(new Error(e.message));
} else {
resolve();
}
});
}));
}
/**
* Unregisters a previously registered content script.
* @param {string} id The identifier passed to a previous call to `registerContentScript`.
* @returns {Promise<void>}
*/
export async function unregisterContentScript(id) {
return new Promise((resolve, reject) => {
chrome.scripting.unregisterContentScripts({ids: [id]}, () => {
const e = chrome.runtime.lastError;
if (e) {
reject(new Error(e.message));
} else {
resolve();
}
});
});
}
/**
* @param {import('script-manager').RegistrationDetails} details
* @param {string} id
* @returns {chrome.scripting.RegisteredContentScript}
*/
function createContentScriptRegistrationOptions(details, id) {
const {css, js, allFrames, matches, runAt} = details;
/** @type {chrome.scripting.RegisteredContentScript} */
const options = {
id: id,
persistAcrossSessions: true
};
if (Array.isArray(css)) {
options.css = [...css];
}
if (Array.isArray(js)) {
options.js = [...js];
}
if (typeof allFrames !== 'undefined') {
options.allFrames = allFrames;
}
if (Array.isArray(matches)) {
options.matches = [...matches];
}
if (typeof runAt !== 'undefined') {
options.runAt = runAt;
}
return options;
}
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