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preserve style element name during livePreview

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also strip _ from methods as we don't use such convention
This commit is contained in:
tophf 2022-02-13 04:36:33 +03:00
parent fcad0ee523
commit 2e021f6ac9
1 changed files with 63 additions and 54 deletions
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117
content/style-injector.js
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@ -9,8 +9,8 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
const PATCH_ID = 'transition-patch'; const PATCH_ID = 'transition-patch';
// styles are out of order if any of these elements is injected between them // styles are out of order if any of these elements is injected between them
const ORDERED_TAGS = new Set(['head', 'body', 'frameset', 'style', 'link']); const ORDERED_TAGS = new Set(['head', 'body', 'frameset', 'style', 'link']);
const docRewriteObserver = RewriteObserver(_sort); const docRewriteObserver = RewriteObserver(sort);
const docRootObserver = RootObserver(_sortIfNeeded); const docRootObserver = RootObserver(sortIfNeeded);
const toSafeChar = c => String.fromCharCode(0xFF00 + c.charCodeAt(0) - 0x20); const toSafeChar = c => String.fromCharCode(0xFF00 + c.charCodeAt(0) - 0x20);
const list = []; const list = [];
const table = new Map(); const table = new Map();
@ -25,24 +25,24 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
list, list,
async apply(styleMap) { async apply(styleMap) {
const styles = _styleMapToArray(styleMap); const styles = styleMapToArray(styleMap);
const value = !styles.length const value = !styles.length
? [] ? []
: await docRootObserver.evade(() => { : await docRootObserver.evade(() => {
if (!isTransitionPatched && isEnabled) { if (!isTransitionPatched && isEnabled) {
_applyTransitionPatch(styles); applyTransitionPatch(styles);
} }
return styles.map(_addUpdate); return styles.map(addUpdate);
}); });
_emitUpdate(); emitUpdate();
return value; return value;
}, },
clear() { clear() {
_addRemoveElements(false); addRemoveElements(false);
list.length = 0; list.length = 0;
table.clear(); table.clear();
_emitUpdate(); emitUpdate();
}, },
clearOrphans() { clearOrphans() {
@ -55,12 +55,12 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
}, },
remove(id) { remove(id) {
_remove(id); remove(id);
_emitUpdate(); emitUpdate();
}, },
replace(styleMap) { replace(styleMap) {
const styles = _styleMapToArray(styleMap); const styles = styleMapToArray(styleMap);
const added = new Set(styles.map(s => s.id)); const added = new Set(styles.map(s => s.id));
const removed = []; const removed = [];
for (const style of list) { for (const style of list) {
@ -68,24 +68,24 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
removed.push(style.id); removed.push(style.id);
} }
} }
styles.forEach(_addUpdate); styles.forEach(addUpdate);
removed.forEach(_remove); removed.forEach(remove);
_emitUpdate(); emitUpdate();
}, },
toggle(enable) { toggle(enable) {
if (isEnabled === enable) return; if (isEnabled === enable) return;
isEnabled = enable; isEnabled = enable;
if (!enable) _toggleObservers(false); if (!enable) toggleObservers(false);
_addRemoveElements(enable); addRemoveElements(enable);
if (enable) _toggleObservers(true); if (enable) toggleObservers(true);
}, },
sort: _sort, sort: sort,
}; };
function _add(style) { function add(style) {
const el = style.el = _createStyle(style); const el = style.el = createStyle(style);
const i = list.findIndex(item => compare(item, style) > 0); const i = list.findIndex(item => compare(item, style) > 0);
table.set(style.id, style); table.set(style.id, style);
if (isEnabled) { if (isEnabled) {
@ -95,7 +95,7 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
return el; return el;
} }
function _addRemoveElements(add) { function addRemoveElements(add) {
for (const {el} of list) { for (const {el} of list) {
if (add) { if (add) {
document.documentElement.appendChild(el); document.documentElement.appendChild(el);
@ -105,11 +105,11 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
} }
} }
function _addUpdate(style) { function addUpdate(style) {
return table.has(style.id) ? _update(style) : _add(style); return table.has(style.id) ? update(style) : add(style);
} }
function _applyTransitionPatch(styles) { function applyTransitionPatch(styles) {
isTransitionPatched = true; isTransitionPatched = true;
// CSS transition bug workaround: since we insert styles asynchronously, // CSS transition bug workaround: since we insert styles asynchronously,
// the browsers, especially Firefox, may apply all transitions on page load // the browsers, especially Firefox, may apply all transitions on page load
@ -118,7 +118,7 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
!styles.some(s => s.code.includes('transition'))) { !styles.some(s => s.code.includes('transition'))) {
return; return;
} }
const el = _createStyle({id: PATCH_ID, code: ` const el = createStyle({id: PATCH_ID, code: `
:root:not(#\\0):not(#\\0) * { :root:not(#\\0):not(#\\0) * {
transition: none !important; transition: none !important;
} }
@ -129,8 +129,9 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
requestAnimationFrame(() => setTimeout(() => el.remove())); requestAnimationFrame(() => setTimeout(() => el.remove()));
} }
function _createStyle({id, code = '', name} = {}) { function createStyle(style = {}) {
if (!creationDoc) _initCreationDoc(); const {id} = style;
if (!creationDoc) initCreationDoc();
let el; let el;
if (document.documentElement instanceof SVGSVGElement) { if (document.documentElement instanceof SVGSVGElement) {
// SVG document style // SVG document style
@ -147,26 +148,30 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
const oldEl = document.getElementById(el.id); const oldEl = document.getElementById(el.id);
if (oldEl) oldEl.id += '-superseded-by-Stylus'; if (oldEl) oldEl.id += '-superseded-by-Stylus';
} }
el.type = 'text/css';
// SVG className is not a string, but an instance of SVGAnimatedString
el.classList.add('stylus');
setTextAndName(el, style);
return el;
}
function setTextAndName(el, {id, code = '', name}) {
if (exposeStyleName && name) { if (exposeStyleName && name) {
el.dataset.name = name; el.dataset.name = name;
name = encodeURIComponent(name.replace(/[#%/@:']/g, toSafeChar)); name = encodeURIComponent(name.replace(/[#%/@:']/g, toSafeChar));
code += `\n/*# sourceURL=${chrome.runtime.getURL(name)}.user.css#${id} */`; code += `\n/*# sourceURL=${chrome.runtime.getURL(name)}.user.css#${id} */`;
} }
el.type = 'text/css';
// SVG className is not a string, but an instance of SVGAnimatedString
el.classList.add('stylus');
el.textContent = code; el.textContent = code;
return el;
} }
function _toggleObservers(shouldStart) { function toggleObservers(shouldStart) {
const onOff = shouldStart && isEnabled ? 'start' : 'stop'; const onOff = shouldStart && isEnabled ? 'start' : 'stop';
docRewriteObserver[onOff](); docRewriteObserver[onOff]();
docRootObserver[onOff](); docRootObserver[onOff]();
} }
function _emitUpdate() { function emitUpdate() {
_toggleObservers(list.length); toggleObservers(list.length);
onUpdate(); onUpdate();
} }
@ -177,11 +182,11 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
and since userAgent.navigator can be spoofed via about:config or devtools, and since userAgent.navigator can be spoofed via about:config or devtools,
we're checking for getPreventDefault that was removed in FF59 we're checking for getPreventDefault that was removed in FF59
*/ */
function _initCreationDoc() { function initCreationDoc() {
creationDoc = !Event.prototype.getPreventDefault && document.wrappedJSObject; creationDoc = !Event.prototype.getPreventDefault && document.wrappedJSObject;
if (creationDoc) { if (creationDoc) {
({createElement, createElementNS} = creationDoc); ({createElement, createElementNS} = creationDoc);
const el = document.documentElement.appendChild(_createStyle()); const el = document.documentElement.appendChild(createStyle());
const isApplied = el.sheet; const isApplied = el.sheet;
el.remove(); el.remove();
if (isApplied) return; if (isApplied) return;
@ -190,7 +195,7 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
({createElement, createElementNS} = document); ({createElement, createElementNS} = document);
} }
function _remove(id) { function remove(id) {
const style = table.get(id); const style = table.get(id);
if (!style) return; if (!style) return;
table.delete(id); table.delete(id);
@ -198,14 +203,14 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
style.el.remove(); style.el.remove();
} }
function _sort() { function sort() {
docRootObserver.evade(() => { docRootObserver.evade(() => {
list.sort(compare); list.sort(compare);
_addRemoveElements(true); addRemoveElements(true);
}); });
} }
function _sortIfNeeded() { function sortIfNeeded() {
let needsSort; let needsSort;
let el = list.length && list[0].el; let el = list.length && list[0].el;
if (!el) { if (!el) {
@ -226,13 +231,15 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
// some styles are not injected to the document // some styles are not injected to the document
if (i < list.length) needsSort = true; if (i < list.length) needsSort = true;
} }
if (needsSort) _sort(); if (needsSort) sort();
return needsSort; return needsSort;
} }
function _styleMapToArray(styleMap) { function styleMapToArray(styleMap) {
({exposeStyleName} = styleMap.cfg || {}); if (styleMap.cfg) {
delete styleMap.cfg; ({exposeStyleName} = styleMap.cfg);
delete styleMap.cfg;
}
return Object.values(styleMap).map(({id, code, name}) => ({ return Object.values(styleMap).map(({id, code, name}) => ({
id, id,
name, name,
@ -240,11 +247,13 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
})); }));
} }
function _update({id, code}) { function update(newStyle) {
const {id, code} = newStyle;
const style = table.get(id); const style = table.get(id);
if (style.code !== code) { if (style.code !== code ||
style.name !== newStyle.name && exposeStyleName) {
style.code = code; style.code = code;
style.el.textContent = code; setTextAndName(style.el, newStyle);
} }
} }
@ -253,14 +262,14 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
let root; let root;
let observing = false; let observing = false;
let timer; let timer;
const observer = new MutationObserver(_check); const observer = new MutationObserver(check);
return {start, stop}; return {start, stop};
function start() { function start() {
if (observing) return; if (observing) return;
// detect dynamic iframes rewritten after creation by the embedder i.e. externally // detect dynamic iframes rewritten after creation by the embedder i.e. externally
root = document.documentElement; root = document.documentElement;
timer = setTimeout(_check); timer = setTimeout(check);
observer.observe(document, {childList: true}); observer.observe(document, {childList: true});
observing = true; observing = true;
} }
@ -272,7 +281,7 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
observing = false; observing = false;
} }
function _check() { function check() {
if (root !== document.documentElement) { if (root !== document.documentElement) {
root = document.documentElement; root = document.documentElement;
onChange(); onChange();
@ -302,7 +311,7 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
function evade(fn) { function evade(fn) {
const restore = observing && start; const restore = observing && start;
stop(); stop();
return new Promise(resolve => _run(fn, resolve, _waitForRoot)) return new Promise(resolve => run(fn, resolve, waitForRoot))
.then(restore); .then(restore);
} }
@ -320,7 +329,7 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
observing = false; observing = false;
} }
function _run(fn, resolve, wait) { function run(fn, resolve, wait) {
if (document.documentElement) { if (document.documentElement) {
resolve(fn()); resolve(fn());
return true; return true;
@ -328,8 +337,8 @@ window.StyleInjector = window.INJECTED === 1 ? window.StyleInjector : ({
if (wait) wait(fn, resolve); if (wait) wait(fn, resolve);
} }
function _waitForRoot(...args) { function waitForRoot(...args) {
new MutationObserver((_, observer) => _run(...args) && observer.disconnect()) new MutationObserver((_, observer) => run(...args) && observer.disconnect())
.observe(document, {childList: true}); .observe(document, {childList: true});
} }
} }