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add a comment for USO devs

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This commit is contained in:
tophf 2022-09-16 15:32:43 +03:00
parent 62987fe5f8
commit 09691a6362
1 changed files with 4 additions and 4 deletions
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8
content/install-hook-userstyles.js
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@ -194,7 +194,8 @@
function inPageContext(eventId, eventIdHost, styleId, apiUrl) { function inPageContext(eventId, eventIdHost, styleId, apiUrl) {
let done, orphaned, vars; let done, orphaned, vars;
if (!window.chrome) window.chrome = {runtime: {sendMessage: () => {}}}; // USO bug in FF // `chrome` may be empty if no extensions use externally_connectable but USO needs it
if (!window.chrome) window.chrome = {runtime: {sendMessage: () => {}}};
const EXT_ID = 'fjnbnpbmkenffdnngjfgmeleoegfcffe'; const EXT_ID = 'fjnbnpbmkenffdnngjfgmeleoegfcffe';
const {defineProperty} = Object; const {defineProperty} = Object;
const {dispatchEvent, CustomEvent, removeEventListener} = window; const {dispatchEvent, CustomEvent, removeEventListener} = window;
@ -224,9 +225,6 @@ function inPageContext(eventId, eventIdHost, styleId, apiUrl) {
], ],
]; ];
OVR.forEach(([obj, name, caller], i) => { OVR.forEach(([obj, name, caller], i) => {
/* Using Proxy to make the override undetectable so Stylish cannot track our users,
* which was the primary reason privacy-concerned users abandoned Stylish.
* TODO: add a user option to allow USO see the user has Stylus? */
const orig = obj[name]; const orig = obj[name];
const ovr = new Proxy(orig, { const ovr = new Proxy(orig, {
apply(fn, me, args) { apply(fn, me, args) {
@ -237,6 +235,8 @@ function inPageContext(eventId, eventIdHost, styleId, apiUrl) {
defineProperty(obj, name, {value: ovr}); defineProperty(obj, name, {value: ovr});
OVR[i] = [obj, name, ovr, orig]; // same args as restore() OVR[i] = [obj, name, ovr, orig]; // same args as restore()
}); });
/* We set `isInstalled` at page start intentionally not trying to replicate Stylish login events.
* This difference allows USO site to detect presence of Stylus (or another similar extension). */
window.isInstalled = true; window.isInstalled = true;
addEventListener(eventId, onCommand, true); addEventListener(eventId, onCommand, true);
function onCommand(e) { function onCommand(e) {