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Instantiate procedural filterer instance on demand only

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The procedural filterer will be instantiated only when
needed, i.e. only when there are actual procedural
filters to enforce.
This commit is contained in:
Raymond Hill 2020-07-24 19:08:48 -04:00
parent 3b72c7cb04
commit e98ea7ea9b
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GPG Key ID: 25E1490B761470C2
1 changed files with 44 additions and 34 deletions
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78
src/js/contentscript.js
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@ -762,6 +762,9 @@ vAPI.injectScriptlet = function(doc, text) {
this.mustApplySelectors = false;
this.selectors = new Map();
this.hiddenNodes = new Set();
if ( vAPI.domWatcher instanceof Object ) {
vAPI.domWatcher.addListener(this);
}
}
addProceduralSelectors(aa) {
@ -873,7 +876,7 @@ vAPI.injectScriptlet = function(doc, text) {
onDOMCreated() {
this.domIsReady = true;
this.domFilterer.commitNow();
this.domFilterer.commit();
}
onDOMChanged(addedNodes, removedNodes) {
@ -900,12 +903,9 @@ vAPI.injectScriptlet = function(doc, text) {
this.exceptedCSSRules = [];
this.reOnlySelectors = /\n\{[^\n]+/g;
this.exceptions = [];
this.proceduralFilterer = new DOMProceduralFilterer(this);
this.proceduralFilterer = null;
this.hideNodeAttr = undefined;
this.hideNodeStyleSheetInjected = false;
if ( vAPI.domWatcher instanceof Object ) {
vAPI.domWatcher.addListener(this);
}
// https://github.com/uBlockOrigin/uBlock-issues/issues/167
// By the time the DOMContentLoaded is fired, the content script might
// have been disconnected from the background page. Unclear why this
@ -1059,13 +1059,15 @@ vAPI.injectScriptlet = function(doc, text) {
entry.injected === false
) {
userStylesheet.add(
entry.selectors + '\n{' + entry.declarations + '}'
`${entry.selectors}\n{${entry.declarations}}`
);
}
}
this.addedCSSRules.clear();
userStylesheet.apply();
this.proceduralFilterer.commitNow();
if ( this.proceduralFilterer instanceof Object ) {
this.proceduralFilterer.commitNow();
}
}
commit(commitNow) {
@ -1077,19 +1079,27 @@ vAPI.injectScriptlet = function(doc, text) {
}
}
proceduralFiltererInstance() {
if ( this.proceduralFilterer instanceof Object === false ) {
this.proceduralFilterer = new DOMProceduralFilterer(this);
}
return this.proceduralFilterer;
}
addProceduralSelectors(aa) {
this.proceduralFilterer.addProceduralSelectors(aa);
if ( aa.length === 0 ) { return; }
this.proceduralFiltererInstance().addProceduralSelectors(aa);
}
createProceduralFilter(o) {
return this.proceduralFilterer.createProceduralFilter(o);
return this.proceduralFiltererInstance().createProceduralFilter(o);
}
getAllSelectors() {
const out = this.getAllSelectors_(false);
out.procedural = Array.from(
this.proceduralFilterer.selectors.values()
);
out.procedural = this.proceduralFilterer instanceof Object
? Array.from(this.proceduralFilterer.selectors.values())
: [];
return out;
}
@ -1104,17 +1114,6 @@ vAPI.injectScriptlet = function(doc, text) {
if ( selectors.length === 0 ) { return 0; }
return document.querySelectorAll(selectors.join(',\n')).length;
}
onDOMCreated() {
this.proceduralFilterer.onDOMCreated();
}
onDOMChanged() {
this.proceduralFilterer.onDOMChanged.apply(
this.proceduralFilterer,
arguments
);
}
};
}
@ -1304,6 +1303,24 @@ vAPI.injectScriptlet = function(doc, text) {
}
};
const stop = function() {
document.removeEventListener('error', onResourceFailed, true);
if ( processTimer !== undefined ) {
clearTimeout(processTimer);
}
if ( vAPI.domWatcher instanceof Object ) {
vAPI.domWatcher.removeListener(domWatcherInterface);
}
vAPI.shutdown.remove(stop);
vAPI.domCollapser = null;
};
const start = function() {
if ( vAPI.domWatcher instanceof Object ) {
vAPI.domWatcher.addListener(domWatcherInterface);
}
};
const domWatcherInterface = {
onDOMCreated: function() {
if ( self.vAPI instanceof Object === false ) { return; }
@ -1334,12 +1351,7 @@ vAPI.injectScriptlet = function(doc, text) {
document.addEventListener('error', onResourceFailed, true);
vAPI.shutdown.add(function() {
document.removeEventListener('error', onResourceFailed, true);
if ( processTimer !== undefined ) {
clearTimeout(processTimer);
}
});
vAPI.shutdown.add(stop);
},
onDOMChanged: function(addedNodes) {
if ( addedNodes.length === 0 ) { return; }
@ -1357,11 +1369,7 @@ vAPI.injectScriptlet = function(doc, text) {
}
};
if ( vAPI.domWatcher instanceof Object ) {
vAPI.domWatcher.addListener(domWatcherInterface);
}
vAPI.domCollapser = { add, addMany, addIFrame, addIFrames, process };
vAPI.domCollapser = { start };
}
/******************************************************************************/
@ -1711,6 +1719,8 @@ vAPI.injectScriptlet = function(doc, text) {
return;
}
vAPI.domCollapser.start();
if ( response.noCosmeticFiltering ) {
vAPI.domFilterer = null;
vAPI.domSurveyor = null;