stylus/background/navigation-manager.js

104 lines
3.3 KiB
JavaScript

/* global CHROME FIREFOX URLS deepEqual ignoreChromeError */// toolbox.js
/* global bgReady */// common.js
/* global msg */
'use strict';
/* exported navMan */
const navMan = (() => {
const listeners = new Set();
let prevData = {};
chrome.webNavigation.onCommitted.addListener(onNavigation.bind('committed'));
chrome.webNavigation.onHistoryStateUpdated.addListener(onFakeNavigation.bind('history'));
chrome.webNavigation.onReferenceFragmentUpdated.addListener(onFakeNavigation.bind('hash'));
return {
/** @param {function(data: Object, type: ('committed'|'history'|'hash'))} fn */
onUrlChange(fn) {
listeners.add(fn);
},
};
/** @this {string} type */
async function onNavigation(data) {
if (CHROME && data.timeStamp === prevData.timeStamp && deepEqual(data, prevData)) {
return; // Chrome bug: listener is called twice with identical data
}
prevData = data;
if (CHROME &&
URLS.chromeProtectsNTP &&
data.url.startsWith('https://www.google.') &&
data.url.includes('/_/chrome/newtab?')) {
// Modern Chrome switched to WebUI NTP so this is obsolete, but there may be exceptions
// TODO: investigate, and maybe use a separate listener for CHROME <= ver
const tab = await browser.tabs.get(data.tabId);
const url = tab.pendingUrl || tab.url;
if (url === 'chrome://newtab/') {
data.url = url;
}
}
listeners.forEach(fn => fn(data, this));
}
/** @this {string} type */
function onFakeNavigation(data) {
const {url, frameId} = data;
onNavigation.call(this, data);
msg.sendTab(data.tabId, {method: 'urlChanged', url}, {frameId})
.catch(msg.ignoreError);
}
})();
bgReady.all.then(() => {
/*
* Expose style version on greasyfork/sleazyfork 1) info page and 2) code page
* Not using manifest.json as adding a content script disables the extension on update.
*/
const urlMatches = '/scripts/\\d+[^/]*(/code)?([?#].*)?$';
chrome.webNavigation.onCommitted.addListener(({tabId}) => {
chrome.tabs.executeScript(tabId, {
file: '/content/install-hook-greasyfork.js',
runAt: 'document_start',
});
}, {
url: [
{hostEquals: 'greasyfork.org', urlMatches},
{hostEquals: 'sleazyfork.org', urlMatches},
],
});
/*
* Removes the Get Stylus button on style pages.
* Not using manifest.json as adding a content script disables the extension on update.
*/
chrome.webNavigation.onCommitted.addListener(({tabId}) => {
chrome.tabs.executeScript(tabId, {
file: '/content/install-hook-userstylesworld.js',
runAt: 'document_start',
});
}, {
url: [
{hostEquals: 'userstyles.world'},
],
});
/*
* FF misses some about:blank iframes so we inject our content script explicitly
*/
if (FIREFOX) {
chrome.webNavigation.onDOMContentLoaded.addListener(async ({tabId, frameId}) => {
if (frameId &&
!await msg.sendTab(tabId, {method: 'ping'}, {frameId}).catch(ignoreChromeError)) {
for (const file of chrome.runtime.getManifest().content_scripts[0].js) {
chrome.tabs.executeScript(tabId, {
frameId,
file,
matchAboutBlank: true,
}, ignoreChromeError);
}
}
}, {
url: [{urlEquals: 'about:blank'}],
});
}
});