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Delta Between Two Patch Sets: include.preload.js

Issue 29374674: Issue 4864 - Start using ESLint for adblockpluschrome (Closed)
Left Patch Set: Add arrow-parens rule to match existing convention Created March 7, 2017, 10:48 a.m.
Right Patch Set: Use .includes again Created March 31, 2017, 8:37 a.m.
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1 /* 1 /*
2 * This file is part of Adblock Plus <https://adblockplus.org/>, 2 * This file is part of Adblock Plus <https://adblockplus.org/>,
3 * Copyright (C) 2006-2016 Eyeo GmbH 3 * Copyright (C) 2006-2017 eyeo GmbH
4 * 4 *
5 * Adblock Plus is free software: you can redistribute it and/or modify 5 * Adblock Plus is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 3 as 6 * it under the terms of the GNU General Public License version 3 as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
8 * 8 *
9 * Adblock Plus is distributed in the hope that it will be useful, 9 * Adblock Plus is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details. 12 * GNU General Public License for more details.
13 * 13 *
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330 function runInPageContext(fn, arg) 330 function runInPageContext(fn, arg)
331 { 331 {
332 let script = document.createElement("script"); 332 let script = document.createElement("script");
333 script.type = "application/javascript"; 333 script.type = "application/javascript";
334 script.async = false; 334 script.async = false;
335 script.textContent = "(" + fn + ")(" + JSON.stringify(arg) + ");"; 335 script.textContent = "(" + fn + ")(" + JSON.stringify(arg) + ");";
336 document.documentElement.appendChild(script); 336 document.documentElement.appendChild(script);
337 document.documentElement.removeChild(script); 337 document.documentElement.removeChild(script);
338 } 338 }
339 339
340 // Chrome doesn't allow us to intercept WebSockets[1], and therefore 340 // Before Chrome 58 the webRequest API didn't allow us to intercept
341 // some ad networks are misusing them as a way to serve adverts and circumvent 341 // WebSockets[1], and therefore some ad networks are misusing them as a way to
342 // us. As a workaround we wrap WebSocket, preventing blocked WebSocket 342 // serve adverts and circumvent us. As a workaround we wrap WebSocket,
343 // connections from being opened. 343 // preventing blocked WebSocket connections from being opened.
344 // [1] - https://bugs.chromium.org/p/chromium/issues/detail?id=129353 344 // [1] - https://bugs.chromium.org/p/chromium/issues/detail?id=129353
345 function wrapWebSocket() 345 function wrapWebSocket()
346 { 346 {
347 let randomEventName = "abpws-" + Math.random().toString(36).substr(2); 347 let randomEventName = "abpws-" + Math.random().toString(36).substr(2);
348 348
349 document.addEventListener(randomEventName, event => 349 document.addEventListener(randomEventName, event =>
350 { 350 {
351 ext.backgroundPage.sendMessage({ 351 ext.backgroundPage.sendMessage({
352 type: "request.websocket", 352 type: "request.websocket",
353 url: event.detail.url 353 url: event.detail.url
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384 384
385 dispatchEvent(new RealCustomEvent(eventName, {detail: {url}})); 385 dispatchEvent(new RealCustomEvent(eventName, {detail: {url}}));
386 } 386 }
387 387
388 function WrappedWebSocket(url, ...args) 388 function WrappedWebSocket(url, ...args)
389 { 389 {
390 // Throw correct exceptions if the constructor is used improperly. 390 // Throw correct exceptions if the constructor is used improperly.
391 if (!(this instanceof WrappedWebSocket)) return RealWebSocket(); 391 if (!(this instanceof WrappedWebSocket)) return RealWebSocket();
392 if (arguments.length < 1) return new RealWebSocket(); 392 if (arguments.length < 1) return new RealWebSocket();
393 393
394 let websocket; 394 let websocket = new RealWebSocket(url, ...args);
395 if (arguments.length == 1)
396 websocket = new RealWebSocket(url);
397 else
398 websocket = new RealWebSocket(url, args[0]);
399 395
400 checkRequest(websocket.url, blocked => 396 checkRequest(websocket.url, blocked =>
401 { 397 {
402 if (blocked) 398 if (blocked)
403 closeWebSocket(websocket); 399 closeWebSocket(websocket);
404 }); 400 });
405 401
406 return websocket; 402 return websocket;
407 } 403 }
408 WrappedWebSocket.prototype = RealWebSocket.prototype; 404 WrappedWebSocket.prototype = RealWebSocket.prototype;
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470 if (!ourShadowRoot) 466 if (!ourShadowRoot)
471 return; 467 return;
472 let desc = Object.getOwnPropertyDescriptor(Element.prototype, 468 let desc = Object.getOwnPropertyDescriptor(Element.prototype,
473 "shadowRoot"); 469 "shadowRoot");
474 let shadowRoot = Function.prototype.call.bind(desc.get); 470 let shadowRoot = Function.prototype.call.bind(desc.get);
475 471
476 Object.defineProperty(Element.prototype, "shadowRoot", { 472 Object.defineProperty(Element.prototype, "shadowRoot", {
477 configurable: true, enumerable: true, get() 473 configurable: true, enumerable: true, get()
478 { 474 {
479 let thisShadow = shadowRoot(this); 475 let thisShadow = shadowRoot(this);
480 return thisShadow == ourShadowRoot ? null : shadow; 476 return thisShadow == ourShadowRoot ? null : thisShadow;
481 } 477 }
482 }); 478 });
483 }, null); 479 }, null);
484 } 480 }
485 481
486 return shadow; 482 return shadow;
487 }, 483 },
488 484
489 addSelectors(selectors, filters) 485 addSelectors(selectors, filters)
490 { 486 {
491 if (selectors.length == 0) 487 if (selectors.length == 0)
492 return; 488 return;
493 489
494 if (!this.style) 490 if (!this.style)
495 { 491 {
496 // Create <style> element lazily, only if we add styles. Add it to 492 // Create <style> element lazily, only if we add styles. Add it to
497 // the shadow DOM if possible. Otherwise fallback to the <head> or 493 // the shadow DOM if possible. Otherwise fallback to the <head> or
498 // <html> element. If we have injected a style element before that 494 // <html> element. If we have injected a style element before that
499 // has been removed (the sheet property is null), create a new one. 495 // has been removed (the sheet property is null), create a new one.
500 this.style = document.createElement("style"); 496 this.style = document.createElement("style");
501 (this.shadow || document.head || 497 (this.shadow || document.head ||
502 document.documentElement).appendChild(this.style); 498 document.documentElement).appendChild(this.style);
503 499
504 // It can happen that the frame already navigated to a different 500 // It can happen that the frame already navigated to a different
505 // document while we were waiting for the background page to respond. 501 // document while we were waiting for the background page to respond.
506 // In that case the sheet property will stay null, after addind the 502 // In that case the sheet property will stay null, after addind the
507 // <style> element to the shadow DOM. 503 // <style> element to the shadow DOM.
508 if (!this.style.sheet) 504 if (!this.style.sheet)
509 return; 505 return;
510 } 506 }
511 507
512 // If using shadow DOM, we have to add the ::content pseudo-element 508 // If using shadow DOM, we have to add the ::content pseudo-element
513 // before each selector, in order to match elements within the 509 // before each selector, in order to match elements within the
514 // insertion point. 510 // insertion point.
515 let preparedSelectors = []; 511 let preparedSelectors = [];
516 if (this.shadow) 512 if (this.shadow)
517 { 513 {
518 for (let selector of selectors) 514 for (let selector of selectors)
519 { 515 {
520 let subSelectors = splitSelector(selector); 516 let subSelectors = splitSelector(selector);
521 for (let subSelector of subSelectors) 517 for (let subSelector of subSelectors)
522 preparedSelectors.push("::content " + subSelector); 518 preparedSelectors.push("::content " + subSelector);
523 } 519 }
524 } 520 }
525 else 521 else
522 {
526 preparedSelectors = selectors; 523 preparedSelectors = selectors;
524 }
527 525
528 // Safari only allows 8192 primitive selectors to be injected at once[1], we 526 // Safari only allows 8192 primitive selectors to be injected at once[1], we
529 // therefore chunk the inserted selectors into groups of 200 to be safe. 527 // therefore chunk the inserted selectors into groups of 200 to be safe.
530 // (Chrome also has a limit, larger... but we're not certain exactly what it 528 // (Chrome also has a limit, larger... but we're not certain exactly what it
531 // is! Edge apparently has no such limit.) 529 // is! Edge apparently has no such limit.)
532 // [1] - https://github.com/WebKit/webkit/blob/1cb2227f6b2a1035f7bdc46e5ab69 debb75fc1de/Source/WebCore/css/RuleSet.h#L68 530 // [1] - https://github.com/WebKit/webkit/blob/1cb2227f6b2a1035f7bdc46e5ab69 debb75fc1de/Source/WebCore/css/RuleSet.h#L68
533 for (let i = 0; i < preparedSelectors.length; i += this.selectorGroupSize) 531 for (let i = 0; i < preparedSelectors.length; i += this.selectorGroupSize)
534 { 532 {
535 let selector = preparedSelectors.slice( 533 let selector = preparedSelectors.slice(
536 i, i + this.selectorGroupSize 534 i, i + this.selectorGroupSize
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577 checkCollapse(event.target); 575 checkCollapse(event.target);
578 }, true); 576 }, true);
579 577
580 document.addEventListener("load", event => 578 document.addEventListener("load", event =>
581 { 579 {
582 let element = event.target; 580 let element = event.target;
583 if (/^i?frame$/.test(element.localName)) 581 if (/^i?frame$/.test(element.localName))
584 checkCollapse(element); 582 checkCollapse(element);
585 }, true); 583 }, true);
586 } 584 }
LEFTRIGHT
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