From 5b2034ff45f854b5b95848b7e4910fa4142c4c5f Mon Sep 17 00:00:00 2001
From: csagan5 <32685696+csagan5@users.noreply.github.com>
Date: Sun, 18 Feb 2018 22:43:29 +0100
Subject: [PATCH] Add patch to play videos in background

---
 .../BRM039_play-videos-in-background.patch    | 70 +++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 patches/BRM039_play-videos-in-background.patch

diff --git a/patches/BRM039_play-videos-in-background.patch b/patches/BRM039_play-videos-in-background.patch
new file mode 100644
index 00000000..d6230cfa
--- /dev/null
+++ b/patches/BRM039_play-videos-in-background.patch
@@ -0,0 +1,70 @@
+Author: csagan5 <32685696+csagan5@users.noreply.github.com>
+Date:   Sun Feb 18 22:15:25 2018 +0100
+
+    Play videos in background
+    Break Page Visibility API and Fullscreen API for youtube.com and vimeo.com
+    Original Javascript code by timdream
+
+diff --git a/third_party/WebKit/Source/core/dom/BUILD.gn b/third_party/WebKit/Source/core/dom/BUILD.gn
+--- a/third_party/WebKit/Source/core/dom/BUILD.gn
++++ b/third_party/WebKit/Source/core/dom/BUILD.gn
+@@ -302,6 +302,7 @@ blink_core_sources("dom") {
+     "events/WindowEventContext.cpp",
+     "events/WindowEventContext.h",
+     "extensions/dont-track-me.h",
++    "extensions/video-bg-play.h",
+     "ng/flat_tree_traversal_ng.cc",
+     "ng/flat_tree_traversal_ng.h",
+     "trustedtypes/TrustedHTML.cpp",
+diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
+--- a/third_party/WebKit/Source/core/dom/Document.cpp
++++ b/third_party/WebKit/Source/core/dom/Document.cpp
+@@ -222,6 +222,7 @@
+ #include "core/xml_names.h"
+ #include "core/xmlns_names.h"
+ #include "extensions/dont-track-me.h"
++#include "extensions/video-bg-play.h"
+ #include "platform/CrossThreadFunctional.h"
+ #include "platform/DateComponents.h"
+ #include "platform/EventDispatchForbiddenScope.h"
+@@ -5887,17 +5888,25 @@ void Document::FinishedParsing() {
+ 
+   // determine whether this is a Google search results page
+   const SecurityOrigin *origin = GetSecurityOrigin();
+-  if (origin) {
++  auto* bodyElement = body();
++  if (origin && bodyElement) {
+     WTF::String domain = origin->Domain();
+     size_t pos = domain.Find(".google.");
+-    auto* bodyElement = body();
+-    if (bodyElement && (pos != WTF::kNotFound) && (domain.length() - pos - 8 < 4)) {
++    if ((pos != WTF::kNotFound) && (domain.length() - pos - 8 < 4)) {
+       LOG(INFO) << "injecting dont-track-me Javascript payload";
+       HTMLScriptElement* e = HTMLScriptElement::Create(*this, CreateElementFlags());
+       e->setText(DONT_TRACK_ME_JS);
+       bodyElement->AppendChild(e);
+     }
+-  }
++
++    // check for eligibility of the video bg fix
++    if ((WTF::kNotFound != domain.Find("youtube.com")) || (WTF::kNotFound != domain.Find("vimeo.com"))) {
++      LOG(INFO) << "injecting video-bg-play Javascript payload";
++      HTMLScriptElement* e = HTMLScriptElement::Create(*this, CreateElementFlags());
++      e->setText(VIDEO_BG_PLAY_JS);
++      bodyElement->AppendChild(e);
++    }
++  } // has origin and body element
+ }
+ 
+ void Document::ElementDataCacheClearTimerFired(TimerBase*) {
+diff --git a/third_party/WebKit/Source/core/dom/extensions/video-bg-play.h b/third_party/WebKit/Source/core/dom/extensions/video-bg-play.h
+new file mode 100644
+--- /dev/null
++++ b/third_party/WebKit/Source/core/dom/extensions/video-bg-play.h
+@@ -0,0 +1,6 @@
++#ifndef video_bg_play_h
++#define video_bg_play_h
++
++#define VIDEO_BG_PLAY_JS "'use strict';\n\n/* video background play fix - original version by timdream */\ndocument.videoBGFix = {};\n\n// Page Visibility API\nObject.defineProperties(document.videoBGFix,\n  { 'hidden': {value: false}, 'visibilityState': {value: 'visible'} });\n\nwindow.addEventListener(\n  'visibilitychange', evt => evt.stopImmediatePropagation(), true);\nwindow.addEventListener(\n  'blur', evt => evt.stopImmediatePropagation(), true);\n\n// Fullscreen API\nwindow.addEventListener('fullscreenchange', evt => {\n  Object.defineProperties(document.videoBGFix,\n    { 'fullscreenEnabled': {value: true},\n      'fullscreen': {value: true},\n      'fullscreenElement': {value: document.fullscreenElement.videoBGFix}});\n  window.addEventListener(\n    'fullscreenchange', evt => evt.stopImmediatePropagation(), true);\n}, { capture: true, once: true });\n"
++
++#endif  // video_bg_play_h