feat: enable picture-in-picture mode for video tags

buildflags/BUILD.gn

@@ -18,6 +18,7 @@ buildflag_header("buildflags") {
     "ENABLE_TTS=$enable_tts",
     "ENABLE_COLOR_CHOOSER=$enable_color_chooser",
     "ENABLE_ELECTRON_EXTENSIONS=$enable_electron_extensions",
+    "ENABLE_PICTURE_IN_PICTURE=$enable_picture_in_picture",
     "OVERRIDE_LOCATION_PROVIDER=$enable_fake_location_provider",
   ]
 }

buildflags/buildflags.gni

@@ -18,6 +18,8 @@ declare_args() {
 
   enable_color_chooser = true
 
+  enable_picture_in_picture = true
+
   # Provide a fake location provider for mocking
   # the geolocation responses. Disable it if you
   # need to test with chromium's location provider.

chromium_src/BUILD.gn

@@ -184,4 +184,32 @@ static_library("chrome") {
       ]
     }
   }
+
+  if (enable_picture_in_picture) {
+    sources += [
+      "//chrome/browser/picture_in_picture/picture_in_picture_window_manager.cc",
+      "//chrome/browser/picture_in_picture/picture_in_picture_window_manager.h",
+      "//chrome/browser/ui/views/overlay/back_to_tab_image_button.cc",
+      "//chrome/browser/ui/views/overlay/back_to_tab_image_button.h",
+      "//chrome/browser/ui/views/overlay/close_image_button.cc",
+      "//chrome/browser/ui/views/overlay/close_image_button.h",
+      "//chrome/browser/ui/views/overlay/mute_image_button.cc",
+      "//chrome/browser/ui/views/overlay/mute_image_button.h",
+      "//chrome/browser/ui/views/overlay/overlay_window_views.cc",
+      "//chrome/browser/ui/views/overlay/overlay_window_views.h",
+      "//chrome/browser/ui/views/overlay/playback_image_button.cc",
+      "//chrome/browser/ui/views/overlay/playback_image_button.h",
+      "//chrome/browser/ui/views/overlay/resize_handle_button.cc",
+      "//chrome/browser/ui/views/overlay/resize_handle_button.h",
+      "//chrome/browser/ui/views/overlay/skip_ad_label_button.cc",
+      "//chrome/browser/ui/views/overlay/skip_ad_label_button.h",
+      "//chrome/browser/ui/views/overlay/track_image_button.cc",
+      "//chrome/browser/ui/views/overlay/track_image_button.h",
+    ]
+
+    deps += [
+      "//chrome/app/vector_icons",
+      "//components/vector_icons:vector_icons",
+    ]
+  }
 }

electron_strings.grdp

@@ -18,4 +18,55 @@
   <message name="IDS_DESKTOP_MEDIA_PICKER_MULTIPLE_SCREEN_NAME" desc="Name for screens in the desktop media picker UI when there are multiple monitors.">
     {SCREEN_INDEX, plural, =1{Screen #} other{Screen #}}
   </message>
+
+  <!-- Picture-in-Picture -->
+  <if expr="is_macosx">
+    <message name="IDS_PICTURE_IN_PICTURE_TITLE_TEXT" desc="Title of the Picture-in-Picture window. This appears in the system tray and window header.">
+      Picture in Picture
+    </message>
+  </if>
+  <if expr="not is_macosx">
+    <message name="IDS_PICTURE_IN_PICTURE_TITLE_TEXT" desc="Title of the Picture-in-Picture window. This appears in the system tray and window header.">
+      Picture in picture
+    </message>
+  </if>
+  <message name="IDS_PICTURE_IN_PICTURE_PAUSE_CONTROL_TEXT" desc="Text label of the pause control button. The button appears when the user hovers over the Picture-in-Picture window and the video is currently playing.">
+    Pause
+  </message>
+  <message name="IDS_PICTURE_IN_PICTURE_PLAY_CONTROL_TEXT" desc="Text label of the play control button. The button appears when the user hovers over the Picture-in-Picture window and the video is currently paused.">
+    Play
+  </message>
+  <message name="IDS_PICTURE_IN_PICTURE_REPLAY_CONTROL_TEXT" desc="Text label of the replay control button. The button appears when the user hovers over the Picture-in-Picture window and the video is ended.">
+    Play from the beginning
+  </message>
+  <message name="IDS_PICTURE_IN_PICTURE_BACK_TO_TAB_CONTROL_TEXT" desc="Text label of the back to tab control button. The button appears when the user hovers over the Picture-in-Picture window.">
+    Back to video player
+  </message>
+  <message name="IDS_PICTURE_IN_PICTURE_MUTE_CONTROL_TEXT" desc="Text label of the mute control button. The button appears when the user hovers over the Picture-in-Picture window and the video is currently unmuted.">
+    Mute
+  </message>
+  <message name="IDS_PICTURE_IN_PICTURE_UNMUTE_CONTROL_TEXT" desc="Text label of the mute control button. The button appears when the user hovers over the Picture-in-Picture window and the video is currently muted.">
+    Unmute
+  </message>
+  <message name="IDS_PICTURE_IN_PICTURE_SKIP_AD_CONTROL_TEXT" desc="Text label of the skip ad control button. The button appears when the user hovers over the Picture-in-Picture window.">
+    Skip Ad
+  </message>
+  <message name="IDS_PICTURE_IN_PICTURE_CLOSE_CONTROL_TEXT" desc="Text label of the close control button. The button appears when the user hovers over the Picture-in-Picture window.">
+    Close
+  </message>
+  <message name="IDS_PICTURE_IN_PICTURE_RESIZE_HANDLE_TEXT" desc="Text label of the resize handle. The button appears when the user hovers over the Picture-in-Picture window.">
+    Resize
+  </message>
+  <message name="IDS_PICTURE_IN_PICTURE_PLAY_PAUSE_CONTROL_ACCESSIBLE_TEXT" desc="Accessible text label used for the controls button in the Picture-in-Picture window. The button toggles between play and pause controls.">
+    Toggle video to play or pause
+  </message>
+  <message name="IDS_PICTURE_IN_PICTURE_MUTE_CONTROL_ACCESSIBLE_TEXT" desc="Accessible text label used for the controls button in the Picture-in-Picture window. The button toggles mute state.">
+    Toggle mute
+  </message>
+  <message name="IDS_PICTURE_IN_PICTURE_NEXT_TRACK_CONTROL_ACCESSIBLE_TEXT" desc="Accessible text label used for the controls button in the Picture-in-Picture window. The button invokes next track action.">
+    Next track
+  </message>
+  <message name="IDS_PICTURE_IN_PICTURE_PREVIOUS_TRACK_CONTROL_ACCESSIBLE_TEXT" desc="Accessible text label used for the controls button in the Picture-in-Picture window. The button invokes previous track action.">
+    Previous track
+  </message>
 </grit-part>

patches/chromium/.patches

@@ -74,3 +74,4 @@ build_win_disable_zc_twophase.patch
 disable_color_correct_rendering.patch
 add_contentgpuclient_precreatemessageloop_callback.patch
 fix_vc_incompatible_inline_calls.patch
+picture-in-picture.patch

patches/chromium/picture-in-picture.patch

@@ -0,0 +1,110 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Heilig Benedek <benecene@gmail.com>
+Date: Sat, 10 Aug 2019 00:41:50 +0200
+Subject: feat: enable picture in picture mode for video players
+
+
+diff --git a/chrome/browser/ui/views/overlay/back_to_tab_image_button.cc b/chrome/browser/ui/views/overlay/back_to_tab_image_button.cc
+index 8e4deafa1746eeb48802a0503fefb37bedb33d04..127c62efd2327e1f3f09e9b93a0b8344e2714f80 100644
+--- a/chrome/browser/ui/views/overlay/back_to_tab_image_button.cc
++++ b/chrome/browser/ui/views/overlay/back_to_tab_image_button.cc
+@@ -4,7 +4,7 @@
+
+ #include "chrome/browser/ui/views/overlay/back_to_tab_image_button.h"
+
+-#include "chrome/grit/generated_resources.h"
++#include "electron/grit/electron_resources.h"
+ #include "third_party/skia/include/core/SkColor.h"
+ #include "ui/base/l10n/l10n_util.h"
+ #include "ui/gfx/color_palette.h"
+diff --git a/chrome/browser/ui/views/overlay/close_image_button.cc b/chrome/browser/ui/views/overlay/close_image_button.cc
+index 0aca25164dcad26cc000e289d6eb9010e336e6fc..70114b5aa865b96d3ace898d1faf515b9098abd9 100644
+--- a/chrome/browser/ui/views/overlay/close_image_button.cc
++++ b/chrome/browser/ui/views/overlay/close_image_button.cc
+@@ -4,7 +4,7 @@
+
+ #include "chrome/browser/ui/views/overlay/close_image_button.h"
+
+-#include "chrome/grit/generated_resources.h"
++#include "electron/grit/electron_resources.h"
+ #include "third_party/skia/include/core/SkColor.h"
+ #include "ui/base/l10n/l10n_util.h"
+ #include "ui/gfx/color_palette.h"
+diff --git a/chrome/browser/ui/views/overlay/mute_image_button.cc b/chrome/browser/ui/views/overlay/mute_image_button.cc
+index 8c88ef08dd5165c0429dd90e8a76b711ac15a4df..ebdb06a6391b8108fa51796a4ad5f3a8ca489b60 100644
+--- a/chrome/browser/ui/views/overlay/mute_image_button.cc
++++ b/chrome/browser/ui/views/overlay/mute_image_button.cc
+@@ -5,7 +5,7 @@
+ #include "chrome/browser/ui/views/overlay/mute_image_button.h"
+
+ #include "chrome/app/vector_icons/vector_icons.h"
+-#include "chrome/grit/generated_resources.h"
++#include "electron/grit/electron_resources.h"
+ #include "components/vector_icons/vector_icons.h"
+ #include "third_party/skia/include/core/SkColor.h"
+ #include "ui/base/l10n/l10n_util.h"
+diff --git a/chrome/browser/ui/views/overlay/overlay_window_views.cc b/chrome/browser/ui/views/overlay/overlay_window_views.cc
+index 780863193ca12ec1295752969dfc47ac06a9ae64..e2947b893cfcdb1beaa27beac80a1885ed011ce4 100644
+--- a/chrome/browser/ui/views/overlay/overlay_window_views.cc
++++ b/chrome/browser/ui/views/overlay/overlay_window_views.cc
+@@ -20,7 +20,7 @@
+ #include "chrome/browser/ui/views/overlay/resize_handle_button.h"
+ #include "chrome/browser/ui/views/overlay/skip_ad_label_button.h"
+ #include "chrome/browser/ui/views/overlay/track_image_button.h"
+-#include "chrome/grit/generated_resources.h"
++#include "electron/grit/electron_resources.h"
+ #include "components/vector_icons/vector_icons.h"
+ #include "content/public/browser/picture_in_picture_window_controller.h"
+ #include "content/public/browser/web_contents.h"
+diff --git a/chrome/browser/ui/views/overlay/playback_image_button.cc b/chrome/browser/ui/views/overlay/playback_image_button.cc
+index d9e5174ed622fb030bc37d32fbb40b132d7c4c23..1bf19c344721e74bb29c11a4c5c762a75e5cd821 100644
+--- a/chrome/browser/ui/views/overlay/playback_image_button.cc
++++ b/chrome/browser/ui/views/overlay/playback_image_button.cc
+@@ -5,7 +5,7 @@
+ #include "chrome/browser/ui/views/overlay/playback_image_button.h"
+
+ #include "chrome/app/vector_icons/vector_icons.h"
+-#include "chrome/grit/generated_resources.h"
++#include "electron/grit/electron_resources.h"
+ #include "components/vector_icons/vector_icons.h"
+ #include "third_party/skia/include/core/SkColor.h"
+ #include "ui/base/l10n/l10n_util.h"
+diff --git a/chrome/browser/ui/views/overlay/resize_handle_button.cc b/chrome/browser/ui/views/overlay/resize_handle_button.cc
+index ee6b3612d7bdda591e05e5af338a80167ce6cd53..af093f14f1ef49c6de7228b296c32532203ca568 100644
+--- a/chrome/browser/ui/views/overlay/resize_handle_button.cc
++++ b/chrome/browser/ui/views/overlay/resize_handle_button.cc
+@@ -5,7 +5,7 @@
+ #include "chrome/browser/ui/views/overlay/resize_handle_button.h"
+
+ #include "chrome/app/vector_icons/vector_icons.h"
+-#include "chrome/grit/generated_resources.h"
++#include "electron/grit/electron_resources.h"
+ #include "third_party/skia/include/core/SkColor.h"
+ #include "ui/base/hit_test.h"
+ #include "ui/base/l10n/l10n_util.h"
+diff --git a/chrome/browser/ui/views/overlay/skip_ad_label_button.cc b/chrome/browser/ui/views/overlay/skip_ad_label_button.cc
+index da780c96bb757d7382df5f419e2c0fd644ac72b0..ae520bcf73cf6c39ca428c03975746e20b23c3ee 100644
+--- a/chrome/browser/ui/views/overlay/skip_ad_label_button.cc
++++ b/chrome/browser/ui/views/overlay/skip_ad_label_button.cc
+@@ -4,7 +4,7 @@
+
+ #include "chrome/browser/ui/views/overlay/skip_ad_label_button.h"
+
+-#include "chrome/grit/generated_resources.h"
++#include "electron/grit/electron_resources.h"
+ #include "ui/base/l10n/l10n_util.h"
+ #include "ui/gfx/color_palette.h"
+ #include "ui/views/background.h"
+diff --git a/chrome/browser/ui/views/overlay/track_image_button.cc b/chrome/browser/ui/views/overlay/track_image_button.cc
+index 8f42277409a216f81d21723eb03045ac54525b0e..f7a15bfde9a43c15b18e8afbd60a0b19960f2c93 100644
+--- a/chrome/browser/ui/views/overlay/track_image_button.cc
++++ b/chrome/browser/ui/views/overlay/track_image_button.cc
+@@ -5,7 +5,7 @@
+ #include "chrome/browser/ui/views/overlay/track_image_button.h"
+
+ #include "chrome/app/vector_icons/vector_icons.h"
+-#include "chrome/grit/generated_resources.h"
++#include "electron/grit/electron_resources.h"
+ #include "components/vector_icons/vector_icons.h"
+ #include "third_party/skia/include/core/SkColor.h"
+ #include "ui/base/l10n/l10n_util.h"

shell/browser/atom_browser_client.cc

@@ -402,6 +402,9 @@ void AtomBrowserClient::OverrideWebkitPrefs(content::RenderViewHost* host,
   prefs->default_minimum_page_scale_factor = 1.f;
   prefs->default_maximum_page_scale_factor = 1.f;
   prefs->navigate_on_drag_drop = false;
+#if !BUILDFLAG(ENABLE_PICTURE_IN_PICTURE)
+  prefs->picture_in_picture_enabled = false;
+#endif
 
   ui::NativeTheme* native_theme = ui::NativeTheme::GetInstanceForNativeUi();
   prefs->preferred_color_scheme = native_theme->ShouldUseDarkColors()
@@ -684,6 +687,14 @@ bool AtomBrowserClient::CanCreateWindow(
   return false;
 }
 
+#if BUILDFLAG(ENABLE_PICTURE_IN_PICTURE)
+std::unique_ptr<content::OverlayWindow>
+AtomBrowserClient::CreateWindowForPictureInPicture(
+    content::PictureInPictureWindowController* controller) {
+  return content::OverlayWindow::Create(controller);
+}
+#endif
+
 void AtomBrowserClient::GetAdditionalAllowedSchemesForFileSystem(
     std::vector<std::string>* additional_schemes) {
   auto schemes_list = api::GetStandardSchemes();

shell/browser/atom_browser_client.h

@@ -14,6 +14,7 @@
 #include "base/synchronization/lock.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/render_process_host_observer.h"
+#include "electron/buildflags/buildflags.h"
 #include "net/ssl/client_cert_identity.h"
 
 namespace content {
@@ -127,6 +128,10 @@ class AtomBrowserClient : public content::ContentBrowserClient,
                        bool user_gesture,
                        bool opener_suppressed,
                        bool* no_javascript_access) override;
+#if BUILDFLAG(ENABLE_PICTURE_IN_PICTURE)
+  std::unique_ptr<content::OverlayWindow> CreateWindowForPictureInPicture(
+      content::PictureInPictureWindowController* controller) override;
+#endif
   void GetAdditionalAllowedSchemesForFileSystem(
       std::vector<std::string>* additional_schemes) override;
   void GetAdditionalWebUISchemes(

shell/browser/common_web_contents_delegate.cc

@@ -55,6 +55,10 @@
 #include "shell/browser/printing/print_preview_message_handler.h"
 #endif
 
+#if BUILDFLAG(ENABLE_PICTURE_IN_PICTURE)
+#include "chrome/browser/picture_in_picture/picture_in_picture_window_manager.h"
+#endif
+
 using content::BrowserThread;
 
 namespace electron {
@@ -636,4 +640,23 @@ void CommonWebContentsDelegate::SetHtmlApiFullscreen(bool enter_fullscreen) {
   native_fullscreen_ = false;
 }
 
+content::PictureInPictureResult
+CommonWebContentsDelegate::EnterPictureInPicture(
+    content::WebContents* web_contents,
+    const viz::SurfaceId& surface_id,
+    const gfx::Size& natural_size) {
+#if BUILDFLAG(ENABLE_PICTURE_IN_PICTURE)
+  return PictureInPictureWindowManager::GetInstance()->EnterPictureInPicture(
+      web_contents, surface_id, natural_size);
+#else
+  return content::PictureInPictureResult::kNotSupported;
+#endif
+}
+
+void CommonWebContentsDelegate::ExitPictureInPicture() {
+#if BUILDFLAG(ENABLE_PICTURE_IN_PICTURE)
+  PictureInPictureWindowManager::GetInstance()->ExitPictureInPicture();
+#endif
+}
+
 }  // namespace electron

shell/browser/common_web_contents_delegate.h

@@ -102,6 +102,11 @@ class CommonWebContentsDelegate : public content::WebContentsDelegate,
   bool HandleKeyboardEvent(
       content::WebContents* source,
       const content::NativeWebKeyboardEvent& event) override;
+  content::PictureInPictureResult EnterPictureInPicture(
+      content::WebContents* web_contents,
+      const viz::SurfaceId&,
+      const gfx::Size& natural_size) override;
+  void ExitPictureInPicture() override;
 
   // InspectableWebContentsDelegate:
   void DevToolsSaveToFile(const std::string& url,

shell/browser/feature_list.cc

@@ -10,6 +10,8 @@
 #include "base/command_line.h"
 #include "base/feature_list.h"
 #include "content/public/common/content_features.h"
+#include "electron/buildflags/buildflags.h"
+#include "media/base/media_switches.h"
 
 namespace electron {
 
@@ -25,6 +27,9 @@ void InitializeFeatureList() {
   // when node integration is enabled.
   disable_features +=
       std::string(",") + features::kSpareRendererForSitePerProcess.name;
+#if !BUILDFLAG(ENABLE_PICTURE_IN_PICTURE)
+  disable_features += std::string(",") + media::kPictureInPicture.name;
+#endif
   base::FeatureList::InitializeInstance(enable_features, disable_features);
 }
 

shell/common/api/features.cc

@@ -45,6 +45,10 @@ bool IsExtensionsEnabled() {
   return BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS);
 }
 
+bool IsPictureInPictureEnabled() {
+  return BUILDFLAG(ENABLE_PICTURE_IN_PICTURE);
+}
+
 bool IsComponentBuild() {
 #if defined(COMPONENT_BUILD)
   return true;
@@ -67,6 +71,7 @@ void Initialize(v8::Local<v8::Object> exports,
   dict.SetMethod("isViewApiEnabled", &IsViewApiEnabled);
   dict.SetMethod("isTtsEnabled", &IsTtsEnabled);
   dict.SetMethod("isPrintingEnabled", &IsPrintingEnabled);
+  dict.SetMethod("isPictureInPictureEnabled", &IsPictureInPictureEnabled);
   dict.SetMethod("isComponentBuild", &IsComponentBuild);
   dict.SetMethod("isExtensionsEnabled", &IsExtensionsEnabled);
 }

spec/api-web-contents-spec.js

@@ -1273,4 +1273,23 @@ describe('webContents module', () => {
       expect(data).to.be.an.instanceof(Buffer).that.is.not.empty()
     })
   })
+
+  describe('PictureInPicture video', () => {
+    it('works as expected', (done) => {
+      w.destroy()
+      w = new BrowserWindow({
+        show: false,
+        webPreferences: {
+          sandbox: true
+        }
+      })
+      w.webContents.once('did-finish-load', async () => {
+        const result = await w.webContents.executeJavaScript(
+          `runTest(${features.isPictureInPictureEnabled()})`, true)
+        expect(result).to.be.true()
+        done()
+      })
+      w.loadFile(path.join(fixtures, 'api', 'picture-in-picture.html'))
+    })
+  })
 })