Side by Side Diff: include.preload.js
Issue 29894568:
Issue 6999 - Generate style sheets in background page (Closed)
Base URL: https://hg.adblockplus.org/adblockpluschrome/
Patch Set:
Created Sept. 28, 2018, 12:27 p.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-present eyeo GmbH | 3 * Copyright (C) 2006-present 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 |
| (...skipping 390 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... | |
| 401 this.inline = true; | 401 this.inline = true; |
| 402 | 402 |
| 403 this.elemHideEmulation = new ElemHideEmulation( | 403 this.elemHideEmulation = new ElemHideEmulation( |
| 404 () => {}, | 404 () => {}, |
| 405 this.hideElements.bind(this) | 405 this.hideElements.bind(this) |
| 406 ); | 406 ); |
| 407 } | 407 } |
| 408 ContentFiltering.prototype = { | 408 ContentFiltering.prototype = { |
| 409 selectorGroupSize: 1024, | 409 selectorGroupSize: 1024, |
| 410 | 410 |
| 411 createStyleElement() | |
| 412 { | |
| 413 // Create <style> element lazily, only if we add styles. Add it to | |
| 414 // the <head> or <html> element. If we have injected a style element | |
| 415 // before that has been removed (the sheet property is null), create a | |
| 416 // new one. | |
| 417 let style = document.createElement("style"); | |
| 418 (document.head || document.documentElement).appendChild(style); | |
| 419 | |
| 420 // It can happen that the frame already navigated to a different | |
| 421 // document while we were waiting for the background page to respond. | |
| 422 // In that case the sheet property may stay null, after adding the | |
| 423 // <style> element. | |
| 424 if (!style.sheet) | |
| 425 return null; | |
| 426 | |
| 427 return style; | |
| 428 }, | |
| 429 | |
| 430 addStyleSheet(styleSheet, groupName) | |
| 431 { | |
| 432 let style = this.styles.get(groupName); | |
| 433 | |
| 434 if (!style) | |
| 435 { | |
| 436 style = this.createStyleElement(); | |
| 437 if (!style) | |
| 438 return; | |
| 439 | |
| 440 this.styles.set(groupName, style); | |
| 441 } | |
| 442 | |
| 443 style.textContent = styleSheet; | |
| 444 }, | |
| 445 | |
| 411 addSelectorsInline(selectors, groupName, appendOnly = false) | 446 addSelectorsInline(selectors, groupName, appendOnly = false) |
| 412 { | 447 { |
| 413 let style = this.styles.get(groupName); | 448 let style = this.styles.get(groupName); |
| 414 | 449 |
| 415 if (style && !appendOnly) | 450 if (style && !appendOnly) |
| 416 { | 451 { |
| 417 while (style.sheet.cssRules.length > 0) | 452 while (style.sheet.cssRules.length > 0) |
| 418 style.sheet.deleteRule(0); | 453 style.sheet.deleteRule(0); |
| 419 } | 454 } |
| 420 | 455 |
| 421 if (selectors.length == 0) | 456 if (selectors.length == 0) |
| 422 return; | 457 return; |
| 423 | 458 |
| 424 if (!style) | 459 if (!style) |
| 425 { | 460 { |
| 426 // Create <style> element lazily, only if we add styles. Add it to | 461 style = this.createStyleElement(); |
| 427 // the <head> or <html> element. If we have injected a style element | 462 if (!style) |
| 428 // before that has been removed (the sheet property is null), create a | |
| 429 // new one. | |
| 430 style = document.createElement("style"); | |
| 431 (document.head || document.documentElement).appendChild(style); | |
| 432 | |
| 433 // It can happen that the frame already navigated to a different | |
| 434 // document while we were waiting for the background page to respond. | |
| 435 // In that case the sheet property may stay null, after adding the | |
| 436 // <style> element. | |
| 437 if (!style.sheet) | |
| 438 return; | 463 return; |
| 439 | 464 |
| 440 this.styles.set(groupName, style); | 465 this.styles.set(groupName, style); |
| 441 } | 466 } |
| 442 | 467 |
| 443 // Chromium's Blink engine supports only up to 8,192 simple selectors, and | 468 // Chromium's Blink engine supports only up to 8,192 simple selectors, and |
| 444 // even fewer compound selectors, in a rule. The exact number of selectors | 469 // even fewer compound selectors, in a rule. The exact number of selectors |
| 445 // that would work depends on their sizes (e.g. "#foo .bar" has a | 470 // that would work depends on their sizes (e.g. "#foo .bar" has a |
| 446 // size of 2). Since we don't know the sizes of the selectors here, we | 471 // size of 2). Since we don't know the sizes of the selectors here, we |
| 447 // simply split them into groups of 1,024, based on the reasonable | 472 // simply split them into groups of 1,024, based on the reasonable |
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| 516 if (this.tracer) | 541 if (this.tracer) |
| 517 this.tracer.disconnect(); | 542 this.tracer.disconnect(); |
| 518 this.tracer = null; | 543 this.tracer = null; |
| 519 | 544 |
| 520 if (response.trace) | 545 if (response.trace) |
| 521 this.tracer = new ElementHidingTracer(); | 546 this.tracer = new ElementHidingTracer(); |
| 522 | 547 |
| 523 this.inline = response.inline; | 548 this.inline = response.inline; |
| 524 | 549 |
| 525 if (this.inline) | 550 if (this.inline) |
| 526 this.addSelectorsInline(response.selectors, "standard"); | 551 this.addStyleSheet(response.styleSheet, "standard"); |
| 527 | 552 |
| 528 if (this.tracer) | 553 if (this.tracer) |
| 529 this.tracer.addSelectors(response.selectors); | 554 this.tracer.addSelectors(response.selectors); |
| 530 | 555 |
| 531 this.elemHideEmulation.apply(response.emulatedPatterns); | 556 this.elemHideEmulation.apply(response.emulatedPatterns); |
| 532 }); | 557 }); |
| 533 } | 558 } |
| 534 }; | 559 }; |
| 535 | 560 |
| 536 if (document instanceof HTMLDocument) | 561 if (document instanceof HTMLDocument) |
| (...skipping 13 matching lines...) Expand all Loading... | |
| 550 let element = event.target; | 575 let element = event.target; |
| 551 if (/^i?frame$/.test(element.localName)) | 576 if (/^i?frame$/.test(element.localName)) |
| 552 checkCollapse(element); | 577 checkCollapse(element); |
| 553 }, true); | 578 }, true); |
| 554 } | 579 } |
| 555 | 580 |
| 556 window.checkCollapse = checkCollapse; | 581 window.checkCollapse = checkCollapse; |
| 557 window.contentFiltering = contentFiltering; | 582 window.contentFiltering = contentFiltering; |
| 558 window.typeMap = typeMap; | 583 window.typeMap = typeMap; |
| 559 window.getURLsFromElement = getURLsFromElement; | 584 window.getURLsFromElement = getURLsFromElement; |
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