mirror of
https://github.com/gorhill/uBlock.git
synced 2024-11-05 18:32:30 +01:00
Replace exec with transpose in procedural filters
The purpose is to avoid having to iterate through
all input nodes at each operator implementation
level. The `transpose` method deals with only one
input node, and the iteration is performed by the
main procedural filtering entry points.
Additionally:
- Add `:spath` to HTML filtering
- Rename `:watch-attrs` to `:watch-attr`
- `:watch=attrs` is deprecated and will be kept around
until it is safe to remove it completely
This commit is contained in:
Raymond Hill
parent
4956a166d3
commit
41685f4cce
@ -469,14 +469,10 @@ vAPI.DOMFilterer = (function() {
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}
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this.needle = new RegExp(arg0, arg1);
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}
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exec(input) {
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const output = [];
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for ( const node of input ) {
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if ( this.needle.test(node.textContent) ) {
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output.push(node);
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}
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transpose(node, output) {
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if ( this.needle.test(node.textContent) ) {
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output.push(node);
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}
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return output;
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}
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};
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@ -484,24 +480,17 @@ vAPI.DOMFilterer = (function() {
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constructor(task) {
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this.pselector = new PSelector(task[1]);
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}
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exec(input) {
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const output = [];
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for ( const node of input ) {
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if ( this.pselector.test(node) === this.target ) {
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output.push(node);
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}
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transpose(node, output) {
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if ( this.pselector.test(node) === this.target ) {
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output.push(node);
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}
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return output;
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}
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};
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PSelectorIfTask.prototype.target = true;
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const PSelectorIfNotTask = class extends PSelectorIfTask {
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constructor(task) {
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super(task);
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this.target = false;
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}
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};
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PSelectorIfNotTask.prototype.target = false;
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const PSelectorMatchesCSSTask = class {
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constructor(task) {
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@ -512,46 +501,31 @@ vAPI.DOMFilterer = (function() {
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}
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this.value = new RegExp(arg0, arg1);
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}
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exec(input) {
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const output = [];
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for ( const node of input ) {
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const style = window.getComputedStyle(node, this.pseudo);
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if ( style === null ) { return null; } /* FF */
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if ( this.value.test(style[this.name]) ) {
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output.push(node);
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}
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transpose(node, output) {
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const style = window.getComputedStyle(node, this.pseudo);
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if ( style !== null && this.value.test(style[this.name]) ) {
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output.push(node);
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}
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return output;
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}
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};
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PSelectorMatchesCSSTask.prototype.pseudo = null;
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const PSelectorMatchesCSSAfterTask = class extends PSelectorMatchesCSSTask {
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constructor(task) {
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super(task);
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this.pseudo = ':after';
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}
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};
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PSelectorMatchesCSSAfterTask.prototype.pseudo = ':after';
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const PSelectorMatchesCSSBeforeTask = class extends PSelectorMatchesCSSTask {
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constructor(task) {
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super(task);
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this.pseudo = ':before';
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}
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};
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PSelectorMatchesCSSBeforeTask.prototype.pseudo = ':before';
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const PSelectorMinTextLengthTask = class {
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constructor(task) {
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this.min = task[1];
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}
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exec(input) {
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const output = [];
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for ( const node of input ) {
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if ( node.textContent.length >= this.min ) {
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output.push(node);
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}
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transpose(node, output) {
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if ( node.textContent.length >= this.min ) {
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output.push(node);
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}
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return output;
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}
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};
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@ -559,20 +533,15 @@ vAPI.DOMFilterer = (function() {
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constructor(task) {
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this.nth = task[1];
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}
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exec(input) {
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const output = [];
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for ( let node of input ) {
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let nth = this.nth;
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for (;;) {
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node = node.parentElement;
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if ( node === null ) { break; }
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nth -= 1;
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if ( nth !== 0 ) { continue; }
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output.push(node);
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break;
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}
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transpose(node, output) {
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let nth = this.nth;
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for (;;) {
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node = node.parentElement;
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if ( node === null ) { return; }
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nth -= 1;
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if ( nth === 0 ) { break; }
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}
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return output;
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output.push(node);
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}
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};
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@ -580,25 +549,21 @@ vAPI.DOMFilterer = (function() {
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constructor(task) {
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this.spath = task[1];
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}
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exec(input) {
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const output = [];
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for ( let node of input ) {
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const parent = node.parentElement;
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if ( parent === null ) { continue; }
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let pos = 1;
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for (;;) {
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node = node.previousElementSibling;
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if ( node === null ) { break; }
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pos += 1;
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}
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const nodes = parent.querySelectorAll(
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':scope > :nth-child(' + pos + ')' + this.spath
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);
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for ( const node of nodes ) {
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output.push(node);
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}
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transpose(node, output) {
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const parent = node.parentElement;
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if ( parent === null ) { return; }
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let pos = 1;
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for (;;) {
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node = node.previousElementSibling;
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if ( node === null ) { break; }
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pos += 1;
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}
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const nodes = parent.querySelectorAll(
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`:scope > :nth-child(${pos})${this.spath}`
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);
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for ( const node of nodes ) {
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output.push(node);
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}
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return output;
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}
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};
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@ -623,17 +588,14 @@ vAPI.DOMFilterer = (function() {
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filterer.onDOMChanged([ null ]);
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}
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}
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exec(input) {
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if ( input.length === 0 ) { return input; }
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transpose(node, output) {
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output.push(node);
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if ( this.observed.has(node) ) { return; }
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if ( this.observer === null ) {
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this.observer = new MutationObserver(this.handler);
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}
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for ( const node of input ) {
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if ( this.observed.has(node) ) { continue; }
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this.observer.observe(node, this.observerOptions);
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this.observed.add(node);
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}
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return input;
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this.observer.observe(node, this.observerOptions);
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this.observed.add(node);
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}
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};
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@ -642,23 +604,19 @@ vAPI.DOMFilterer = (function() {
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this.xpe = document.createExpression(task[1], null);
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this.xpr = null;
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}
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exec(input) {
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const output = [];
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for ( const node of input ) {
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this.xpr = this.xpe.evaluate(
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node,
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XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,
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this.xpr
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);
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let j = this.xpr.snapshotLength;
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while ( j-- ) {
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const node = this.xpr.snapshotItem(j);
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if ( node.nodeType === 1 ) {
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output.push(node);
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}
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transpose(node, output) {
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this.xpr = this.xpe.evaluate(
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node,
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XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,
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this.xpr
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);
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let j = this.xpr.snapshotLength;
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while ( j-- ) {
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const node = this.xpr.snapshotItem(j);
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if ( node.nodeType === 1 ) {
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output.push(node);
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}
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}
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return output;
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}
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};
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@ -677,7 +635,7 @@ vAPI.DOMFilterer = (function() {
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[ ':not', PSelectorIfNotTask ],
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[ ':nth-ancestor', PSelectorNthAncestorTask ],
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[ ':spath', PSelectorSpathTask ],
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[ ':watch-attrs', PSelectorWatchAttrs ],
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[ ':watch-attr', PSelectorWatchAttrs ],
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[ ':xpath', PSelectorXpathTask ],
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]);
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}
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@ -704,21 +662,27 @@ vAPI.DOMFilterer = (function() {
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let nodes = this.prime(input);
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for ( const task of this.tasks ) {
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if ( nodes.length === 0 ) { break; }
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nodes = task.exec(nodes);
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const transposed = [];
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for ( const node of nodes ) {
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task.transpose(node, transposed);
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}
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nodes = transposed;
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}
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return nodes;
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}
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test(input) {
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const nodes = this.prime(input);
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const AA = [ null ];
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for ( const node of nodes ) {
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AA[0] = node;
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let aa = AA;
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let output = [ node ];
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for ( const task of this.tasks ) {
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aa = task.exec(aa);
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if ( aa.length === 0 ) { break; }
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const transposed = [];
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for ( const node of output ) {
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task.transpose(node, transposed);
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}
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output = transposed;
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if ( output.length === 0 ) { break; }
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}
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if ( aa.length !== 0 ) { return true; }
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if ( output.length !== 0 ) { return true; }
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}
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return false;
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}
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@ -50,14 +50,10 @@
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}
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this.needle = new RegExp(arg0, arg1);
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}
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exec(input) {
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const output = [];
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for ( const node of input ) {
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if ( this.needle.test(node.textContent) ) {
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output.push(node);
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}
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transpose(node, output) {
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if ( this.needle.test(node.textContent) ) {
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output.push(node);
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}
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return output;
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}
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};
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@ -65,14 +61,10 @@
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constructor(task) {
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this.pselector = new PSelector(task[1]);
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}
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exec(input) {
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const output = [];
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for ( const node of input ) {
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if ( this.pselector.test(node) === this.target ) {
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output.push(node);
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}
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transpose(node, output) {
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if ( this.pselector.test(node) === this.target ) {
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output.push(node);
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}
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return output;
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}
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get invalid() {
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return this.pselector.invalid;
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@ -81,24 +73,17 @@
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PSelectorIfTask.prototype.target = true;
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const PSelectorIfNotTask = class extends PSelectorIfTask {
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constructor(task) {
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super(task);
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this.target = false;
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}
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};
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PSelectorIfNotTask.prototype.target = false;
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const PSelectorMinTextLengthTask = class {
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constructor(task) {
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this.min = task[1];
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}
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exec(input) {
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const output = [];
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for ( const node of input ) {
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if ( node.textContent.length >= this.min ) {
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output.push(node);
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}
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transpose(node, output) {
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if ( node.textContent.length >= this.min ) {
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output.push(node);
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}
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return output;
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}
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};
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@ -106,20 +91,37 @@
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constructor(task) {
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this.nth = task[1];
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}
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exec(input) {
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const output = [];
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for ( let node of input ) {
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let nth = this.nth;
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for (;;) {
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node = node.parentElement;
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if ( node === null ) { break; }
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nth -= 1;
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if ( nth !== 0 ) { continue; }
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output.push(node);
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break;
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}
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transpose(node, output) {
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let nth = this.nth;
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for (;;) {
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node = node.parentElement;
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if ( node === null ) { return; }
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nth -= 1;
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if ( nth === 0 ) { break; }
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}
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output.push(node);
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}
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};
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const PSelectorSpathTask = class {
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constructor(task) {
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this.spath = task[1];
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}
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transpose(node, output) {
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const parent = node.parentElement;
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if ( parent === null ) { return; }
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let pos = 1;
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for (;;) {
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node = node.previousElementSibling;
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if ( node === null ) { break; }
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pos += 1;
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}
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const nodes = parent.querySelectorAll(
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`:scope > :nth-child(${pos})${this.spath}`
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);
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for ( const node of nodes ) {
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output.push(node);
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}
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return output;
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}
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};
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@ -127,25 +129,21 @@
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constructor(task) {
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this.xpe = task[1];
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}
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exec(input) {
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const output = [];
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const xpe = docRegister.createExpression(this.xpe, null);
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let xpr = null;
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for ( const node of input ) {
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xpr = xpe.evaluate(
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node,
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XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,
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xpr
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);
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let j = xpr.snapshotLength;
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while ( j-- ) {
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const node = xpr.snapshotItem(j);
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if ( node.nodeType === 1 ) {
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output.push(node);
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}
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transpose(node, output) {
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const xpr = docRegister.evaluate(
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this.xpe,
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node,
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null,
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XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,
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null
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);
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let j = xpr.snapshotLength;
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while ( j-- ) {
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const node = xpr.snapshotItem(j);
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if ( node.nodeType === 1 ) {
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output.push(node);
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}
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}
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return output;
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}
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};
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@ -181,22 +179,28 @@
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let nodes = this.prime(input);
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for ( const task of this.tasks ) {
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if ( nodes.length === 0 ) { break; }
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nodes = task.exec(nodes);
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const transposed = [];
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for ( const node of nodes ) {
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task.transpose(node, transposed);
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}
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nodes = transposed;
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}
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return nodes;
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}
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test(input) {
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if ( this.invalid ) { return false; }
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const nodes = this.prime(input);
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const AA = [ null ];
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for ( const node of nodes ) {
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AA[0] = node;
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let aa = AA;
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let output = [ node ];
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for ( const task of this.tasks ) {
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aa = task.exec(aa);
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if ( aa.length === 0 ) { break; }
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const transposed = [];
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for ( const node of output ) {
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task.transpose(node, transposed);
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}
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output = transposed;
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if ( output.length === 0 ) { break; }
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}
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if ( aa.length !== 0 ) { return true; }
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if ( output.length !== 0 ) { return true; }
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}
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return false;
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}
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@ -209,7 +213,8 @@
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[ ':min-text-length', PSelectorMinTextLengthTask ],
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[ ':not', PSelectorIfNotTask ],
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[ ':nth-ancestor', PSelectorNthAncestorTask ],
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[ ':xpath', PSelectorXpathTask ]
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[ ':spath', PSelectorSpathTask ],
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[ ':xpath', PSelectorXpathTask ],
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]);
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PSelector.prototype.invalid = false;
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@ -169,6 +169,7 @@
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'min-text-length',
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'not',
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'nth-ancestor',
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'watch-attr',
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'watch-attrs',
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'xpath'
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].join('|'),
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@ -285,6 +286,7 @@
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[ ':-abp-contains', ':has-text' ],
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[ ':-abp-has', ':has' ],
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[ ':contains', ':has-text' ],
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[ ':watch-attrs', ':watch-attr' ],
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]);
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const compileArgument = new Map([
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@ -299,7 +301,7 @@
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[ ':not', compileNotSelector ],
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[ ':nth-ancestor', compileNthAncestorSelector ],
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[ ':spath', compileSpathExpression ],
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[ ':watch-attrs', compileAttrList ],
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[ ':watch-attr', compileAttrList ],
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[ ':xpath', compileXpathExpression ]
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]);
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@ -356,7 +358,7 @@
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break;
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case ':min-text-length':
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case ':nth-ancestor':
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case ':watch-attrs':
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case ':watch-attr':
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case ':xpath':
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raw.push(`${task[0]}(${task[1]})`);
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break;
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