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FF59+: always set style's textContent in page context

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see #461
This commit is contained in:
tophf 2018-09-05 15:58:15 +03:00
parent 74eb7c7ecd
commit dcdb4be10b
1 changed files with 40 additions and 16 deletions
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56
content/apply.js
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@ -18,6 +18,13 @@
var docRewriteObserver;
var docRootObserver;
// FF59+ bug workaround
// See https://github.com/openstyles/stylus/issues/461
// Since it's easy to spoof the browser version in pre-Quantum FF we're checking
// for getPreventDefault which got removed in FF59 https://bugzil.la/691151
const FF_BUG461 = !CHROME && !isOwnPage && !Event.prototype.getPreventDefault;
const pageContextQueue = [];
requestStyles();
chrome.runtime.onMessage.addListener(applyOnMessage);
window.applyOnMessage = applyOnMessage;
@ -262,6 +269,10 @@
docRootObserver.firstStart();
}
if (FF_BUG461 && (gotNewStyles || styles.needTransitionPatch)) {
setContentsInPageContext();
}
if (!isOwnPage && !docRewriteObserver && styleElements.size) {
initDocRewriteObserver();
}
@ -284,6 +295,8 @@
// workaround for Chrome devtools bug fixed in v65
el.remove();
el = null;
} else if (FF_BUG461) {
pageContextQueue.push({id: el.id, el, code});
} else {
el.textContent = code;
}
@ -303,12 +316,8 @@
el.type = 'text/css';
// SVG className is not a string, but an instance of SVGAnimatedString
el.classList.add('stylus');
if (!CHROME && (
// FF bug workaround, see https://github.com/openstyles/stylus/issues/461
location.hostname === 'www.barclaycardus.com' ||
location.hostname === 'www.icloud.com'
)) {
setContentsInPageContext(el, code);
if (FF_BUG461) {
pageContextQueue.push({id: el.id, el, code});
} else {
el.textContent = code;
}
@ -319,16 +328,31 @@
return el;
}
function setContentsInPageContext(el, code) {
const originalId = el.id;
el.id += performance.now();
// when adding to ROOT we don't want our observer to pop up so we use a DIV wrapper
(document.head || ROOT.appendChild(document.createElement('div'))).appendChild(el);
(document.head || ROOT).appendChild(document.createElement('script')).text = `
document.currentScript.remove();
document.getElementById('${el.id}').textContent = ${JSON.stringify(code)};`;
if (!document.head) el.parentNode.remove();
el.id = originalId;
function setContentsInPageContext() {
try {
(document.head || ROOT).appendChild(document.createElement('script')).text = `
document.currentScript.remove();
for (const {id, code} of ${JSON.stringify(pageContextQueue)}) {
(
document.getElementById(id) ||
document.querySelector('style.stylus[id="' + id + '"]') ||
{}
).textContent = code;
}
`;
} catch (e) {}
let failedSome;
for (const {el, code} of pageContextQueue) {
if (el.textContent !== code) {
el.textContent = code;
failedSome = true;
}
}
if (failedSome) {
console.debug('Could not set code of some styles in page context, ' +
'see https://github.com/openstyles/stylus/issues/461');
}
pageContextQueue.length = 0;
}
function addStyleElement(newElement) {