193 lines
22 KiB
Diff
193 lines
22 KiB
Diff
From: csagan5 <32685696+csagan5@users.noreply.github.com>
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Date: Sat, 28 Oct 2017 10:09:41 +0200
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Subject: Inject scripts for AMP, tracking, ads and video
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Remove AMP, tracking and ads from search/news results
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Break Page Visibility API and Fullscreen API for youtube.com and vimeo.com to allow playing videos in background (original Javascript code by timdream)
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Set proper injection script nonce
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Send a random key press to circumvent idle status detection
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License: GPL-3.0-only - https://spdx.org/licenses/GPL-3.0-only.html
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---
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third_party/blink/renderer/core/dom/build.gni | 2 +
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.../blink/renderer/core/dom/document.cc | 64 +++++++++++++++++++
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.../blink/renderer/core/dom/document.h | 3 +
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.../core/dom/extensions/anti_amp_cure.h | 6 ++
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.../core/dom/extensions/video_bg_play.h | 6 ++
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.../renderer/core/html/html_script_element.cc | 5 ++
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.../renderer/core/html/html_script_element.h | 1 +
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7 files changed, 87 insertions(+)
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create mode 100644 third_party/blink/renderer/core/dom/extensions/anti_amp_cure.h
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create mode 100644 third_party/blink/renderer/core/dom/extensions/video_bg_play.h
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diff --git a/third_party/blink/renderer/core/dom/build.gni b/third_party/blink/renderer/core/dom/build.gni
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--- a/third_party/blink/renderer/core/dom/build.gni
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+++ b/third_party/blink/renderer/core/dom/build.gni
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@@ -167,6 +167,8 @@ blink_core_sources_dom = [
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"has_invalidation_flags.h",
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"icon_url.cc",
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"icon_url.h",
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+ "extensions/anti_amp_cure.h",
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+ "extensions/video_bg_play.h",
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"id_target_observer.cc",
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"id_target_observer.h",
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"id_target_observer_registry.cc",
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diff --git a/third_party/blink/renderer/core/dom/document.cc b/third_party/blink/renderer/core/dom/document.cc
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--- a/third_party/blink/renderer/core/dom/document.cc
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+++ b/third_party/blink/renderer/core/dom/document.cc
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@@ -295,6 +295,7 @@
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#include "third_party/blink/renderer/core/page/scrolling/root_scroller_controller.h"
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#include "third_party/blink/renderer/core/page/scrolling/scroll_state_callback.h"
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#include "third_party/blink/renderer/core/page/scrolling/scrolling_coordinator.h"
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+#include "extensions/video_bg_play.h"
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#include "third_party/blink/renderer/core/page/scrolling/snap_coordinator.h"
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#include "third_party/blink/renderer/core/page/scrolling/top_document_root_scroller_controller.h"
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#include "third_party/blink/renderer/core/page/spatial_navigation_controller.h"
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@@ -372,6 +373,8 @@
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#include "third_party/blink/renderer/platform/wtf/text/string_buffer.h"
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#include "third_party/blink/renderer/platform/wtf/text/text_encoding_registry.h"
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+#include "extensions/anti_amp_cure.h"
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+
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#ifndef NDEBUG
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using WeakDocumentSet = blink::HeapHashSet<blink::WeakMember<blink::Document>>;
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static WeakDocumentSet& LiveDocumentSet();
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@@ -7440,6 +7443,64 @@ void Document::OnPrepareToStopParsing() {
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MilestoneForDelayedAsyncScript::kFinishedParsing);
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}
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+void Document::injectScripts() {
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+ // determine whether this is a search results page
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+ const WTF::String& host = url_.Host();
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+ if ((host == nullptr) || host.empty())
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+ return;
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+
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+ auto* bodyElement = body();
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+ if (!bodyElement)
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+ return;
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+ int selected = 0;
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+ size_t pos1 = host.Find("www.google."), pos2 = host.Find("news.google."), pos3 = url_.GetPath().Find("/search"), pos4 = host.Find("images.google.");
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+ if (((pos1 == 0) && (pos3 == 0)) || (pos2 == 0) || (pos4 == 0)) {
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+ LOG(INFO) << "injecting AMP removal Javascript payload";
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+ selected = 1;
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+ // check for eligibility of the video bg fix
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+ } else if (
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+ ((WTF::kNotFound != host.Find("youtube.com")) && (WTF::kNotFound == host.Find("accounts.youtube.com"))) ||
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+ (WTF::kNotFound != host.Find("vimeo.com"))
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+ ) {
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+ LOG(INFO) << "injecting video-bg-play Javascript payload";
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+ selected = 2;
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+ } else
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+ return;
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+
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+ // find out which nonce to use
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+ const AtomicString& nonce = findFirstScriptNonce();
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+
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+ HTMLScriptElement* e = MakeGarbageCollected<HTMLScriptElement>(*this, CreateElementFlags());
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+ if (selected == 1)
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+ e->setTextContent(ANTI_AMP_CURE_JS);
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+ else if (selected == 2)
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+ e->setTextContent(VIDEO_BG_PLAY_JS);
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+ else
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+ NOTREACHED();
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+
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+ if (nonce != g_null_atom) {
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+ e->setNonce(nonce);
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+ } else
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+ LOG(WARNING) << "could not find script nonce to use";
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+
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+ bodyElement->AppendChild(e);
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+}
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+
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+const AtomicString& Document::findFirstScriptNonce() {
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+ HTMLCollection* s = scripts();
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+ unsigned source_length = (unsigned)s->length();
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+ // all scripts are likely to have the nonce, thus scan only first 10
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+ if (source_length > 10)
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+ source_length = 10;
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+ for (unsigned i = 0; i < source_length; ++i) {
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+ Element* element = s->item(i);
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+ const AtomicString& nonce = element->nonce();
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+ if ((nonce != g_null_atom) && !nonce.empty())
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+ return nonce;
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+ }
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+ return g_null_atom;
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+}
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+
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void Document::FinishedParsing() {
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DCHECK(!GetScriptableDocumentParser() || !parser_->IsParsing());
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DCHECK(!GetScriptableDocumentParser() || ready_state_ != kLoading);
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@@ -7506,6 +7567,9 @@ void Document::FinishedParsing() {
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}
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frame->Loader().FinishedParsing();
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+ if (!IsPrefetchOnly()) {
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+ injectScripts();
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+ }
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}
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// Schedule dropping of the ElementDataCache. We keep it alive for a while
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diff --git a/third_party/blink/renderer/core/dom/document.h b/third_party/blink/renderer/core/dom/document.h
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--- a/third_party/blink/renderer/core/dom/document.h
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+++ b/third_party/blink/renderer/core/dom/document.h
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@@ -2076,6 +2076,9 @@ class CORE_EXPORT Document : public ContainerNode,
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void AXContextModeChanged();
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void ClearAXObjectCache();
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+ void injectScripts();
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+ const AtomicString& findFirstScriptNonce();
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+
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bool IsDocumentFragment() const =
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delete; // This will catch anyone doing an unnecessary check.
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bool IsDocumentNode() const =
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diff --git a/third_party/blink/renderer/core/dom/extensions/anti_amp_cure.h b/third_party/blink/renderer/core/dom/extensions/anti_amp_cure.h
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new file mode 100644
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--- /dev/null
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+++ b/third_party/blink/renderer/core/dom/extensions/anti_amp_cure.h
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@@ -0,0 +1,6 @@
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+#ifndef anti_amp_cure_h
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+#define anti_amp_cure_h
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+
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+#define ANTI_AMP_CURE_JS "/* Array of bytes to base64 string decoding */\n/* */\nfunction b64ToUint6(nChr) {\n return nChr > 64 && nChr < 91 ?\n nChr - 65 :\n nChr > 96 && nChr < 123 ?\n nChr - 71 :\n nChr > 47 && nChr < 58 ?\n nChr + 4 :\n nChr === 43 ?\n 62 :\n nChr === 47 ?\n 63 :\n 0;\n}\n\n/* returns an Uint8Array with decoded bytes */\n/* from https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/Base64_encoding_and_decoding#Appendix.3A_Decode_a_Base64_string_to_Uint8Array_or_ArrayBuffer */\nfunction base64DecToArr(sBase64, nBlockSize) {\n var\n // URL encoding variant\n sB64Enc = sBase64.replace('-', '+').replace('_', '/'),\n nInLen = sB64Enc.length,\n nOutLen = nBlockSize ? Math.ceil((nInLen * 3 + 1 >>> 2) / nBlockSize) * nBlockSize : nInLen * 3 + 1 >>> 2,\n aBytes = new Uint8Array(nOutLen);\n\n for (var nMod3, nMod4, nUint24 = 0, nOutIdx = 0, nInIdx = 0; nInIdx < nInLen; nInIdx++) {\n nMod4 = nInIdx & 3;\n nUint24 |= b64ToUint6(sB64Enc.charCodeAt(nInIdx)) << 18 - 6 * nMod4;\n if (nMod4 === 3 || nInLen - nInIdx === 1) {\n for (nMod3 = 0; nMod3 < 3 && nOutIdx < nOutLen; nMod3++, nOutIdx++) {\n aBytes[nOutIdx] = nUint24 >>> (16 >>> nMod3 & 24) & 255;\n }\n nUint24 = 0;\n }\n }\n\n return aBytes;\n}\n\nconst antiAMPPolicy = trustedTypes.createPolicy(\"antiAMP\", {\n createHTML: (s) => s\n});\n\n\nfunction replaceHyperlink(a, url) {\n // create new A element - old one has event listeners attached\n var newA = document.createElement('a');\n newA.referrerPolicy = 'no-referrer';\n // property set when hyperlink has been created by this script\n newA.sane = true;\n newA.href = url;\n // copy CSS classes - news have only one\n newA.className = a.className;\n // scan child nodes for SVGs\n // news nodes will only have a text node\n a.childNodes.forEach(function(n) {\n // remove icon from image result buttons\n if (n.nodeName == 'DIV') {\n var svgs = n.querySelectorAll('div svg');\n if (svgs.length == 2)\n svgs[1].parentNode.removeChild(svgs[1]);\n }\n });\n // use direct HTML as appending nodes skips some e.g. heading\n newA.innerHTML = antiAMPPolicy.createHTML(a.innerHTML);\n // replace hyperlink\n a.parentNode.replaceChild(newA, a);\n return newA;\n}\n\nfunction getURLFromJsData(jsdata) {\n if (!jsdata) return;\n\n var res = jsdata.split(';');\n if (res.length < 3) return;\n // decode the payload\n var data = base64DecToArr(res[1]);\n // 08 = field 1, type Variant\n if (data[0] != 0x08)\n return;\n // 13 = 19 (raw) or -10 (zigzag)\n if (data[1] != 0x13) {\n console.warn('could not decode:', res[1]);\n return;\n }\n // 22 = field 4, type String\n if (data[2] != 0x22)\n return;\n // usually 2 bytes varint e.g. 88-01 = length 136\n res = proto_read_uint32(data, 3);\n // extract slice with the URL\n var url = new TextDecoder().decode(data.slice(res.pos, res.pos + res.value));\n console.log('decoded proto URL:', url);\n return url;\n}\n\nfunction recreateNewsHyperlink(a) {\n var article = a.parentNode;\n if (!article) return false;\n // grab jsdata from parent\n var url = getURLFromJsData(article.getAttribute('jsdata'));\n // use the AMP (but external) URL as fallback\n var obfuscated = false;\n if (!url) {\n url = a.href;\n obfuscated = true;\n }\n\n // ready to replace the hyperlink\n var newA = replaceHyperlink(a, url);\n if (obfuscated)\n newA.setAttribute(\"_target\", \"blank\");\n\n // replace headline hyperlink\n var h4a = article.querySelector('h4 a');\n if (h4a) {\n var newH4a = replaceHyperlink(h4a, url);\n if (obfuscated)\n newH4a.setAttribute(\"_target\", \"blank\");\n }\n\n // remove icon by finding the time sibling\n var t = article.querySelector('time');\n if (t) {\n var found = false;\n t.parentNode.childNodes.forEach(function(n) {\n if (found) return;\n if (n.innerText == \"amp\") {\n t.parentNode.removeChild(n);\n found = true;\n }\n });\n }\n\n // cleanup of the article\n article.removeAttribute('jsmodel');\n article.removeAttribute('jsaction');\n article.removeAttribute('jscontroller');\n article.removeAttribute('jsdata');\n\n return true;\n}\n\n// from protobufjs\nfunction proto_read_uint32(buf, pos) {\n var value = (buf[pos] & 127) >>> 0;\n if (buf[pos++] < 128) return {\n value: value,\n pos: pos\n };\n value = (value | (buf[pos] & 127) << 7) >>> 0;\n if (buf[pos++] < 128) return {\n value: value,\n pos: pos\n };\n value = (value | (buf[pos] & 127) << 14) >>> 0;\n if (buf[pos++] < 128) return {\n value: value,\n pos: pos\n };\n value = (value | (buf[pos] & 127) << 21) >>> 0;\n if (buf[pos++] < 128) return {\n value: value,\n pos: pos\n };\n value = (value | (buf[pos] & 15) << 28) >>> 0;\n if (buf[pos++] < 128) return {\n value: value,\n pos: pos\n };\n\n if ((pos += 5) > buf.length)\n throw RangeError('cannot read string length');\n\n return {\n value: value,\n pos: pos\n };\n}\n\nfunction recreateResultHyperlink(a) {\n var url = a.href;\n // remove AMP class, get actual page URL\n var ampCur = a.getAttribute('data-amp-cur');\n if (ampCur) {\n url = ampCur;\n a.classList.remove('amp_r');\n } else {\n var realLink = getRealLinkFromGoogleUrl(a);\n if (realLink) {\n url = realLink;\n } else {\n // might not be an actual hyperlink, ignore it\n if (!a.href) {\n return false;\n }\n // leave original href unchanged\n }\n }\n\n // re-create with original CSS classes\n replaceHyperlink(a, url);\n\n return true;\n}\n\nfunction isResult(a) {\n if (a.getAttribute('data-amp-cur'))\n return true;\n var inlineMousedown = a.getAttribute('onmousedown');\n if (!inlineMousedown)\n return false;\n // return rwt(....); // E.g Google search results.\n // return google.rwt(...); // E.g. sponsored search results\n // return google.arwt(this); // E.g. sponsored search results (dec 2016).\n return /\\ba?rwt\\(/.test(inlineMousedown) || /\\bctpacw\\b/.test(inlineMousedown);\n}\n\n/**\n * @returns {String} the real URL if the given link is a Google redirect URL.\n */\nfunction getRealLinkFromGoogleUrl(a) {\n if ((a.hostname === location.hostname || a.hostname.indexOf('www.google.') == 0) &&\n /^\\/(local_)?url$/.test(a.pathname)) {\n // Google Maps / Dito (/local_url?q=<url>)\n // Mobile (/url?q=<url>)\n var url = /[?&](?:q|url)=((?:https?|ftp)[%:][^&]+)/.exec(a.search);\n if (url)\n return decodeURIComponent(url[1]);\n // Help pages, e.g. safe browsing (/url?...&q=%2Fsupport%2Fanswer...)\n url = /[?&](?:q|url)=((?:%2[Ff]|\\/)[^&]+)/.exec(a.search);\n if (url)\n return a.origin + decodeURIComponent(url[1]);\n }\n}\n\nfunction sanitizeAds() {\n // scan all divs\n var div = document.getElementById('tads');\n if (div) {\n div.style.display = 'none';\n return true;\n }\n return false;\n}\n\nfunction sanitizeCards(rootNode) {\n var total = 0;\n var sanitized = 0;\n\n // fix cards\n rootNode.querySelectorAll('g-inner-card a').forEach(function(a) {\n total++;\n if (!a.sane && recreateResultHyperlink(a))\n sanitized++;\n });\n console.log(\"sanitized \", sanitized, \"/\", total, \" card hyperlinks\");\n}\n\nfunction hookMoreSearchResults() {\n var cardsFn = function(e) {\n var node = e.target;\n\n if (node.nodeName == '#text' && node.parentNode && node.parentNode.nodeName == 'TITLE') {\n // title is updated when page loading completes, thus trigger hyperlinks fixing afterwards\n sanitizeCards(document);\n document.removeEventListener('DOMNodeInserted', cardsFn);\n }\n }\n\n // detect and sanitize cards\n document.addEventListener('DOMNodeInserted', cardsFn);\n\n var extrares = document.getElementById('extrares');\n if (!extrares) {\n console.warn(\"could not hook more results\");\n return;\n }\n // mutation observers are great but they don't work\n extrares.addEventListener(\"DOMNodeInserted\", function(e) {\n var node = e.target;\n\n if (node.id && node.id.startsWith(\"arc-srp\"))\n sanitizeResultHyperlinks(node);\n });\n}\n\nfunction setMlogoClick() {\n // skip home page\n if (document.getElementById('hplogo')) return;\n\n var mlogo = document.getElementById('qslc');\n if (mlogo && mlogo.children[0]) {\n mlogo = mlogo.children[0];\n } else {\n mlogo = document.getElementById('mlogo');\n }\n if (mlogo) {\n mlogo.removeAttribute(\"href\");\n mlogo.setAttribute(\"onclick\", \"sanitizeAll()\");\n console.log(\"logo link replaced\");\n } else {\n console.warn(\"could not replace logo link\");\n }\n}\n\nfunction sanitizeResultHyperlinks(rootNode) {\n var sanitized = 0,\n total = 0;\n // exclude translation hyperlink nodes\n const exclude = rootNode.querySelectorAll('#tw-ob a');\n // selector for results (doesn't work with news anymore)\n rootNode.querySelectorAll('div[data-hveid]:not([data-hveid=\"\"]) a, div[data-ved]:not([data-ved=\"\"]) a').forEach(function(a) {\n // exclude nodes which should not be processed\n var excluded = false;\n exclude.forEach(function(e) {\n if (excluded) return;\n if (e == a) {\n excluded = true;\n }\n });\n if (excluded) return;\n\n total++;\n if (!a.sane && recreateResultHyperlink(a))\n sanitized++;\n });\n console.log(\"sanitized \", sanitized, \"/\", total, \" result hyperlinks\");\n}\n\nfunction sanitizeAllNews(rootNode) {\n var sanitized = 0,\n total = 0;\n // pick all articles which have the associated data not yet wiped\n rootNode.querySelectorAll('article[jsdata]:not([jsdata=\"\"]) a').forEach(function(a) {\n total++;\n if (!a.sane && recreateNewsHyperlink(a))\n sanitized++;\n });\n console.log(\"sanitized \", sanitized, \"/\", total, \" news hyperlinks\");\n}\n\nfunction hookMoreNews(rootNode) {\n var newsFn = function(e) {\n var node = e.target;\n // the real inserted node is 'C-WIZ', but we need to wait for loading to complete\n if (node.nodeName == '#text' && node.parentNode && node.parentNode.nodeName == 'TITLE') {\n // title is updated when page loading completes, thus trigger hyperlinks fixing afterwards\n sanitizeAllNews(rootNode);\n rootNode.removeEventListener('DOMNodeInserted', newsFn);\n }\n }\n rootNode.addEventListener('DOMNodeInserted', newsFn);\n}\n\nfunction hookMoreImageResults() {\n document.addEventListener(\"DOMNodeInserted\", function(e) {\n var node = e.target;\n // remove card and iframe, fix hyperlink\n if (node.nodeName == \"DIV\" && node.hasAttribute(\"data-query\"))\n sanitizeResultHyperlinks(node);\n else if (node.nodeName == \"IFRAME\")\n node.parentNode.removeChild(node);\n else if (node.nodeName == \"C-WIZ\")\n // replace instead of removing so that correlated image results will be displayed\n node.parentNode.replaceChild(node, document.createTextNode(\"iframe replaced\"));\n });\n}\n\nconsole.log('Bromite click-tracking and AMP removal v0.4.4');\n\nfunction sanitizeAll() {\n console.log(\"ads removed: \", sanitizeAds());\n\n var main = document.getElementById('main');\n if (main)\n sanitizeResultHyperlinks(main);\n else\n console.warning('could not find main search results');\n}\n\nif (document.location.host.indexOf(\"news.google.\") === 0) {\n sanitizeAllNews(document);\n hookMoreNews(document);\n} else {\n // avoid running cleanup on non-result pages\n if (document.location.host.indexOf(\"accounts.google.\") == -1) {\n console.log(\"ads removed: \", sanitizeAds());\n\n if (document.location.search.match(/[?&]tbm=isch/)) {\n // find main c-wiz\n var cwizs = document.querySelectorAll('c-wiz[data-ssc=\"0\"]');\n if (cwizs.length)\n sanitizeResultHyperlinks(cwizs[0]);\n else\n console.warning('could not find main image results');\n // image search results\n hookMoreImageResults();\n } else {\n var main = document.getElementById('main');\n if (main)\n sanitizeResultHyperlinks(main);\n else\n console.warning('could not find main search results');\n // regular search results\n setMlogoClick();\n hookMoreSearchResults();\n }\n }\n}\n"
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+
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+#endif // anti_amp_cure_h
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diff --git a/third_party/blink/renderer/core/dom/extensions/video_bg_play.h b/third_party/blink/renderer/core/dom/extensions/video_bg_play.h
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new file mode 100644
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--- /dev/null
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+++ b/third_party/blink/renderer/core/dom/extensions/video_bg_play.h
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@@ -0,0 +1,6 @@
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+#ifndef video_bg_play_h
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+#define video_bg_play_h
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+
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+#define VIDEO_BG_PLAY_JS "'use strict';\n\nconst IS_YOUTUBE = window.location.hostname.search(/(?:^|.+\\.)youtube.com/) > -1 ||\n window.location.hostname.search(/(?:^|.+\\.)youtube-nocookie.com/) > -1;\nconst IS_MOBILE_YOUTUBE = window.location.hostname == 'm.youtube.com';\nconst IS_VIMEO = window.location.hostname.search(/(?:^|.+\\.)vimeo.com/) > -1;\n\n/* video background play fix - based on https://github.com/mozilla/video-bg-play */\ndocument.wrappedJSObject = {};\n\n// Page Visibility API\nObject.defineProperties(document.wrappedJSObject,\n { 'hidden': {value: false}, 'visibilityState': {value: 'visible'} });\n\nwindow.addEventListener(\n 'visibilitychange', evt => evt.stopImmediatePropagation(), true);\n\n// Fullscreen API\nif (IS_VIMEO) {\n window.addEventListener(\n 'fullscreenchange', evt => evt.stopImmediatePropagation(), true);\n}\n\nfunction activityRefresh() {\n var baseDelay = 3000;\n if (!this.firstRun) {\n if (window.hasOwnProperty('ytcfg')) {\n var cfg = window.ytcfg.get(\"EXPERIMENT_FLAGS\");\n cfg.kevlar_sign_in_prompt_before_mandatory_consent = false;\n window.ytcfg.set(\"EXPERIMENT_FLAGS\", cfg);\n this.firstRun = false;\n } else {\n baseDelay = 200;\n }\n }\n if (window.hasOwnProperty('_lact')) {\n window._lact = Date.now();\n }\n window.setTimeout(activityRefresh, baseDelay + Math.round(Math.random()*baseDelay*3));\n}\n\n// User activity tracking\nif (IS_YOUTUBE) {\n window.setTimeout(activityRefresh, 200 + Math.round(Math.random()*400));\n}\n"
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+
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+#endif // video_bg_play_h
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diff --git a/third_party/blink/renderer/core/html/html_script_element.cc b/third_party/blink/renderer/core/html/html_script_element.cc
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--- a/third_party/blink/renderer/core/html/html_script_element.cc
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+++ b/third_party/blink/renderer/core/html/html_script_element.cc
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@@ -182,6 +182,11 @@ void HTMLScriptElement::setTextContent(const String& string) {
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Node::setTextContent(string);
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}
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+void HTMLScriptElement::setTextDirect(
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+ const char *s) {
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+ Node::setTextContent(s);
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+}
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+
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void HTMLScriptElement::setAsync(bool async) {
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// https://html.spec.whatwg.org/multipage/scripting.html#dom-script-async
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SetBooleanAttribute(html_names::kAsyncAttr, async);
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diff --git a/third_party/blink/renderer/core/html/html_script_element.h b/third_party/blink/renderer/core/html/html_script_element.h
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--- a/third_party/blink/renderer/core/html/html_script_element.h
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+++ b/third_party/blink/renderer/core/html/html_script_element.h
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@@ -60,6 +60,7 @@ class CORE_EXPORT HTMLScriptElement final : public HTMLElement,
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void setTextContentForBinding(const V8UnionStringOrTrustedScript* value,
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ExceptionState& exception_state) override;
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void setTextContent(const String&) override;
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+ void setTextDirect(const char*);
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void setAsync(bool);
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bool async() const;
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--
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2.25.1
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