electron api sendInputEvent 源码

// Copyright (c) 2014 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.

#include "shell/browser/api/atom_api_web_contents.h"

#include 
#include set>
#include string>
#include 
#include 

#include "base/message_loop/message_loop_current.h"
#include "base/no_destructor.h"
#include "base/optional.h"
#include "base/strings/utf_string_conversions.h"
#include "base/threading/thread_restrictions.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/values.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/ssl/security_state_tab_helper.h"
#include "content/browser/frame_host/frame_tree_node.h"             // nogncheck
#include "content/browser/frame_host/render_frame_host_manager.h"   // nogncheck
#include "content/browser/renderer_host/render_widget_host_impl.h"  // nogncheck
#include "content/browser/renderer_host/render_widget_host_view_base.h"  // nogncheck
#include "content/common/widget_messages.h"
#include "content/public/browser/child_process_security_policy.h"
#include "content/public/browser/download_request_utils.h"
#include "content/public/browser/favicon_status.h"
#include "content/public/browser/native_web_keyboard_event.h"
#include "content/public/browser/navigation_details.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/plugin_service.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/render_widget_host.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/service_worker_context.h"
#include "content/public/browser/site_instance.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/context_menu_params.h"
#include "electron/buildflags/buildflags.h"
#include "electron/shell/common/api/api.mojom.h"
#include "mojo/public/cpp/bindings/associated_remote.h"
#include "mojo/public/cpp/system/platform_handle.h"
#include "ppapi/buildflags/buildflags.h"
#include "shell/browser/api/atom_api_browser_window.h"
#include "shell/browser/api/atom_api_debugger.h"
#include "shell/browser/api/atom_api_session.h"
#include "shell/browser/atom_autofill_driver_factory.h"
#include "shell/browser/atom_browser_client.h"
#include "shell/browser/atom_browser_context.h"
#include "shell/browser/atom_browser_main_parts.h"
#include "shell/browser/atom_javascript_dialog_manager.h"
#include "shell/browser/atom_navigation_throttle.h"
#include "shell/browser/browser.h"
#include "shell/browser/child_web_contents_tracker.h"
#include "shell/browser/lib/bluetooth_chooser.h"
#include "shell/browser/native_window.h"
#include "shell/browser/session_preferences.h"
#include "shell/browser/ui/drag_util.h"
#include "shell/browser/ui/inspectable_web_contents.h"
#include "shell/browser/ui/inspectable_web_contents_view.h"
#include "shell/browser/web_contents_permission_helper.h"
#include "shell/browser/web_contents_preferences.h"
#include "shell/browser/web_contents_zoom_controller.h"
#include "shell/browser/web_view_guest_delegate.h"
#include "shell/common/api/atom_api_native_image.h"
#include "shell/common/color_util.h"
#include "shell/common/gin_converters/blink_converter.h"
#include "shell/common/gin_converters/callback_converter.h"
#include "shell/common/gin_converters/content_converter.h"
#include "shell/common/gin_converters/file_path_converter.h"
#include "shell/common/gin_converters/gfx_converter.h"
#include "shell/common/gin_converters/gurl_converter.h"
#include "shell/common/gin_converters/image_converter.h"
#include "shell/common/gin_converters/net_converter.h"
#include "shell/common/gin_converters/value_converter.h"
#include "shell/common/gin_helper/dictionary.h"
#include "shell/common/gin_helper/object_template_builder.h"
#include "shell/common/mouse_util.h"
#include "shell/common/node_includes.h"
#include "shell/common/options_switches.h"
#include "third_party/blink/public/common/associated_interfaces/associated_interface_provider.h"
#include "third_party/blink/public/common/page/page_zoom.h"
#include "third_party/blink/public/mojom/frame/find_in_page.mojom.h"
#include "third_party/blink/public/mojom/frame/fullscreen.mojom.h"
#include "third_party/blink/public/platform/web_cursor_info.h"
#include "third_party/blink/public/platform/web_input_event.h"
#include "ui/display/screen.h"
#include "ui/events/base_event_utils.h"

#if BUILDFLAG(ENABLE_OSR)
#include "shell/browser/osr/osr_render_widget_host_view.h"
#include "shell/browser/osr/osr_web_contents_view.h"
#endif

#if !defined(OS_MACOSX)
#include "ui/aura/window.h"
#else
#include "ui/base/cocoa/defaults_utils.h"
#endif

#if defined(OS_LINUX)
#include "ui/views/linux_ui/linux_ui.h"
#endif

#if defined(OS_LINUX) || defined(OS_WIN)
#include "third_party/blink/public/mojom/renderer_preferences.mojom.h"
#include "ui/gfx/font_render_params.h"
#endif

#if BUILDFLAG(ENABLE_PRINTING)
#include "chrome/browser/printing/print_view_manager_basic.h"
#include "components/printing/common/print_messages.h"
#endif

#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS)
#include "shell/browser/extensions/atom_extension_web_contents_observer.h"
#endif

namespace gin {

#if BUILDFLAG(ENABLE_PRINTING)
template 
struct Converter<:printerbasicinfo> {
  static v8::Local<:value> ToV8(v8::Isolate* isolate,
                                   const printing::PrinterBasicInfo& val) {
    gin_helper::Dictionary dict = gin::Dictionary::CreateEmpty(isolate);
    dict.Set("name", val.printer_name);
    dict.Set("displayName", val.display_name);
    dict.Set("description", val.printer_description);
    dict.Set("status", val.printer_status);
    dict.Set("isDefault", val.is_default ? true : false);
    dict.Set("options", val.options);
    return dict.GetHandle();
  }
};

template 
struct Converter<:margintype> {
  static bool FromV8(v8::Isolate* isolate,
                     v8::Local<:value> val,
                     printing::MarginType* out) {
    std::string type;
    if (ConvertFromV8(isolate, val, &type)) {
      if (type == "default") {
        *out = printing::DEFAULT_MARGINS;
        return true;
      }
      if (type == "none") {
        *out = printing::NO_MARGINS;
        return true;
      }
      if (type == "printableArea") {
        *out = printing::PRINTABLE_AREA_MARGINS;
        return true;
      }
      if (type == "custom") {
        *out = printing::CUSTOM_MARGINS;
        return true;
      }
    }
    return false;
  }
};

template 
struct Converter<:duplexmode> {
  static bool FromV8(v8::Isolate* isolate,
                     v8::Local<:value> val,
                     printing::DuplexMode* out) {
    std::string mode;
    if (ConvertFromV8(isolate, val, &mode)) {
      if (mode == "simplex") {
        *out = printing::SIMPLEX;
        return true;
      }
      if (mode == "longEdge") {
        *out = printing::LONG_EDGE;
        return true;
      }
      if (mode == "shortEdge") {
        *out = printing::SHORT_EDGE;
        return true;
      }
    }
    return false;
  }
};

#endif

template 
struct Converter {
  static v8::Local<:value> ToV8(v8::Isolate* isolate,
                                   WindowOpenDisposition val) {
    std::string disposition = "other";
    switch (val) {
      case WindowOpenDisposition::CURRENT_TAB:
        disposition = "default";
        break;
      case WindowOpenDisposition::NEW_FOREGROUND_TAB:
        disposition = "foreground-tab";
        break;
      case WindowOpenDisposition::NEW_BACKGROUND_TAB:
        disposition = "background-tab";
        break;
      case WindowOpenDisposition::NEW_POPUP:
      case WindowOpenDisposition::NEW_WINDOW:
        disposition = "new-window";
        break;
      case WindowOpenDisposition::SAVE_TO_DISK:
        disposition = "save-to-disk";
        break;
      default:
        break;
    }
    return gin::ConvertToV8(isolate, disposition);
  }
};

template 
struct Converter<:savepagetype> {
  static bool FromV8(v8::Isolate* isolate,
                     v8::Local<:value> val,
                     content::SavePageType* out) {
    std::string save_type;
    if (!ConvertFromV8(isolate, val, &save_type))
      return false;
    save_type = base::ToLowerASCII(save_type);
    if (save_type == "htmlonly") {
      *out = content::SAVE_PAGE_TYPE_AS_ONLY_HTML;
    } else if (save_type == "htmlcomplete") {
      *out = content::SAVE_PAGE_TYPE_AS_COMPLETE_HTML;
    } else if (save_type == "mhtml") {
      *out = content::SAVE_PAGE_TYPE_AS_MHTML;
    } else {
      return false;
    }
    return true;
  }
};

template 
struct Converter<:api::webcontents::type> {
  static v8::Local<:value> ToV8(v8::Isolate* isolate,
                                   electron::api::WebContents::Type val) {
    using Type = electron::api::WebContents::Type;
    std::string type;
    switch (val) {
      case Type::BACKGROUND_PAGE:
        type = "backgroundPage";
        break;
      case Type::BROWSER_WINDOW:
        type = "window";
        break;
      case Type::BROWSER_VIEW:
        type = "browserView";
        break;
      case Type::REMOTE:
        type = "remote";
        break;
      case Type::WEB_VIEW:
        type = "webview";
        break;
      case Type::OFF_SCREEN:
        type = "offscreen";
        break;
      default:
        break;
    }
    return gin::ConvertToV8(isolate, type);
  }

  static bool FromV8(v8::Isolate* isolate,
                     v8::Local<:value> val,
                     electron::api::WebContents::Type* out) {
    using Type = electron::api::WebContents::Type;
    std::string type;
    if (!ConvertFromV8(isolate, val, &type))
      return false;
    if (type == "backgroundPage") {
      *out = Type::BACKGROUND_PAGE;
    } else if (type == "browserView") {
      *out = Type::BROWSER_VIEW;
    } else if (type == "webview") {
      *out = Type::WEB_VIEW;
#if BUILDFLAG(ENABLE_OSR)
    } else if (type == "offscreen") {
      *out = Type::OFF_SCREEN;
#endif
    } else {
      return false;
    }
    return true;
  }
};

template 
struct Converter> {
  static v8::Local<:value> ToV8(
      v8::Isolate* isolate,
      const scoped_refptr<:devtoolsagenthost>& val) {
    gin_helper::Dictionary dict(isolate, v8::Object::New(isolate));
    dict.Set("id", val->GetId());
    dict.Set("url", val->GetURL().spec());
    return dict.GetHandle();
  }
};

}  // namespace gin

namespace electron {

namespace api {

namespace {

// Called when CapturePage is done.
void OnCapturePageDone(gin_helper::Promise<:image> promise,
                       const SkBitmap& bitmap) {
  // Hack to enable transparency in captured image
  promise.Resolve(gfx::Image::CreateFrom1xBitmap(bitmap));
}

base::Optionalbase::TimeDelta> GetCursorBlinkInterval() {
#if defined(OS_MACOSX)
  base::TimeDelta interval;
  if (ui::TextInsertionCaretBlinkPeriod(&interval))
    return interval;
#elif defined(OS_LINUX)
  if (auto* linux_ui = views::LinuxUI::instance())
    return linux_ui->GetCursorBlinkInterval();
#elif defined(OS_WIN)
  const auto system_msec = ::GetCaretBlinkTime();
  if (system_msec != 0) {
    return (system_msec == INFINITE)
               ? base::TimeDelta()
               : base::TimeDelta::FromMilliseconds(system_msec);
  }
#endif
  return base::nullopt;
}

}  // namespace

WebContents::WebContents(v8::Isolate* isolate,
                         content::WebContents* web_contents)
    : content::WebContentsObserver(web_contents),
      type_(Type::REMOTE),
      weak_factory_(this) {
  web_contents->SetUserAgentOverride(GetBrowserContext()->GetUserAgent(),
                                     false);
  Init(isolate);
  AttachAsUserData(web_contents);
  InitZoomController(web_contents, gin::Dictionary::CreateEmpty(isolate));
  registry_.AddInterface(base::BindRepeating(&WebContents::BindElectronBrowser,
                                             base::Unretained(this)));
  bindings_.set_connection_error_handler(base::BindRepeating(
      &WebContents::OnElectronBrowserConnectionError, base::Unretained(this)));
}

WebContents::WebContents(v8::Isolate* isolate,
                         std::unique_ptr<:webcontents> web_contents,
                         Type type)
    : content::WebContentsObserver(web_contents.get()),
      type_(type),
      weak_factory_(this) {
  DCHECK(type != Type::REMOTE)
      "Can‘t take ownership of a remote WebContents";
  auto session = Session::CreateFrom(isolate, GetBrowserContext());
  session_.Reset(isolate, session.ToV8());
  InitWithSessionAndOptions(isolate, std::move(web_contents), session,
                            gin::Dictionary::CreateEmpty(isolate));
}

WebContents::WebContents(v8::Isolate* isolate,
                         const gin_helper::Dictionary& options)
    : weak_factory_(this) {
  // Read options.
  options.Get("backgroundThrottling", &background_throttling_);

  // Get type
  options.Get("type", &type_);

#if BUILDFLAG(ENABLE_OSR)
  bool b = false;
  if (options.Get(options::kOffscreen, &b) && b)
    type_ = Type::OFF_SCREEN;
#endif

  // Init embedder earlier
  options.Get("embedder", &embedder_);

  // Whether to enable DevTools.
  options.Get("devTools", &enable_devtools_);

  // BrowserViews are not attached to a window initially so they should start
  // off as hidden. This is also important for compositor recycling. See:
  // https://github.com/electron/electron/pull/21372
  bool initially_shown = type_ != Type::BROWSER_VIEW;
  options.Get(options::kShow, &initially_shown);

  // Obtain the session.
  std::string partition;
  gin::Handle session;
  if (options.Get("session", &session) && !session.IsEmpty()) {
  } else if (options.Get("partition", &partition)) {
    session = Session::FromPartition(isolate, partition);
  } else {
    // Use the default session if not specified.
    session = Session::FromPartition(isolate, "");
  }
  session_.Reset(isolate, session.ToV8());

  std::unique_ptr<:webcontents> web_contents;
  if (IsGuest()) {
    scoped_refptr<:siteinstance> site_instance =
        content::SiteInstance::CreateForURL(session->browser_context(),
                                            GURL("chrome-guest://fake-host"));
    content::WebContents::CreateParams params(session->browser_context(),
                                              site_instance);
    guest_delegate_ =
        std::make_unique(embedder_->web_contents(), this);
    params.guest_delegate = guest_delegate_.get();

#if BUILDFLAG(ENABLE_OSR)
    if (embedder_ && embedder_->IsOffScreen()) {
      auto* view = new OffScreenWebContentsView(
          false,
          base::BindRepeating(&WebContents::OnPaint, base::Unretained(this)));
      params.view = view;
      params.delegate_view = view;

      web_contents = content::WebContents::Create(params);
      view->SetWebContents(web_contents.get());
    } else {
#endif
      web_contents = content::WebContents::Create(params);
#if BUILDFLAG(ENABLE_OSR)
    }
  } else if (IsOffScreen()) {
    bool transparent = false;
    options.Get("transparent", &transparent);

    content::WebContents::CreateParams params(session->browser_context());
    auto* view = new OffScreenWebContentsView(
        transparent,
        base::BindRepeating(&WebContents::OnPaint, base::Unretained(this)));
    params.view = view;
    params.delegate_view = view;

    web_contents = content::WebContents::Create(params);
    view->SetWebContents(web_contents.get());
#endif
  } else {
    content::WebContents::CreateParams params(session->browser_context());
    params.initially_hidden = !initially_shown;
    web_contents = content::WebContents::Create(params);
  }

  InitWithSessionAndOptions(isolate, std::move(web_contents), session, options);
}

void WebContents::InitZoomController(content::WebContents* web_contents,
                                     const gin_helper::Dictionary& options) {
  WebContentsZoomController::CreateForWebContents(web_contents);
  zoom_controller_ = WebContentsZoomController::FromWebContents(web_contents);
  double zoom_factor;
  if (options.Get(options::kZoomFactor, &zoom_factor))
    zoom_controller_->SetDefaultZoomFactor(zoom_factor);
}

void WebContents::InitWithSessionAndOptions(
    v8::Isolate* isolate,
    std::unique_ptr<:webcontents> owned_web_contents,
    gin::Handle session,
    const gin_helper::Dictionary& options) {
  Observe(owned_web_contents.get());
  // TODO(zcbenz): Make InitWithWebContents take unique_ptr.
  // At the time of writing we are going through a refactoring and I don‘t want
  // to make other people‘s work harder.
  InitWithWebContents(owned_web_contents.release(), session->browser_context(),
                      IsGuest());

  managed_web_contents()->GetView()->SetDelegate(this);

  auto* prefs = web_contents()->GetMutableRendererPrefs();
  prefs->accept_languages = g_browser_process->GetApplicationLocale();

#if defined(OS_LINUX) || defined(OS_WIN)
  // Update font settings.
  static const base::NoDestructor<:fontrenderparams>params(
      gfx::GetFontRenderParams(gfx::FontRenderParamsQuery(), nullptr));
  prefs->should_antialias_text = params->antialiasing;
  prefs->use_subpixel_positioning = params->subpixel_positioning;
  prefs->hinting = params->hinting;
  prefs->use_autohinter = params->autohinter;
  prefs->use_bitmaps = params->use_bitmaps;
  prefs->subpixel_rendering = params->subpixel_rendering;
#endif

  // Honor the system‘s cursor blink rate settings
  if (auto interval = GetCursorBlinkInterval())
    prefs->caret_blink_interval = *interval;

  // Save the preferences in C++.
  new WebContentsPreferences(web_contents(), options);

  WebContentsPermissionHelper::CreateForWebContents(web_contents());
  SecurityStateTabHelper::CreateForWebContents(web_contents());
  InitZoomController(web_contents(), options);
#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS)
  extensions::AtomExtensionWebContentsObserver::CreateForWebContents(
      web_contents());
#endif

  registry_.AddInterface(base::BindRepeating(&WebContents::BindElectronBrowser,
                                             base::Unretained(this)));
  bindings_.set_connection_error_handler(base::BindRepeating(
      &WebContents::OnElectronBrowserConnectionError, base::Unretained(this)));
  AutofillDriverFactory::CreateForWebContents(web_contents());

  web_contents()->SetUserAgentOverride(GetBrowserContext()->GetUserAgent(),
                                       false);

  if (IsGuest()) {
    NativeWindow* owner_window = nullptr;
    if (embedder_) {
      // New WebContents‘s owner_window is the embedder‘s owner_window.
      auto* relay =
          NativeWindowRelay::FromWebContents(embedder_->web_contents());
      if (relay)
        owner_window = relay->GetNativeWindow();
    }
    if (owner_window)
      SetOwnerWindow(owner_window);
  }

  Init(isolate);
  AttachAsUserData(web_contents());
}

WebContents::~WebContents() {
  // The destroy() is called.
  if (managed_web_contents()) {
    managed_web_contents()->GetView()->SetDelegate(nullptr);

    RenderViewDeleted(web_contents()->GetRenderViewHost());

    if (type_ == Type::BROWSER_WINDOW && owner_window()) {
      // For BrowserWindow we should close the window and clean up everything
      // before WebContents is destroyed.
      for (ExtendedWebContentsObserver& observer : observers_)
        observer.OnCloseContents();
      // BrowserWindow destroys WebContents asynchronously, manually emit the
      // destroyed event here.
      WebContentsDestroyed();
    } else if (Browser::Get()->is_shutting_down()) {
      // Destroy WebContents directly when app is shutting down.
      DestroyWebContents(false /* async */);
    } else {
      // Destroy WebContents asynchronously unless app is shutting down,
      // because destroy() might be called inside WebContents‘s event handler.
      DestroyWebContents(!IsGuest() /* async */);
      // The WebContentsDestroyed will not be called automatically because we
      // destroy the webContents in the next tick. So we have to manually
      // call it here to make sure "destroyed" event is emitted.
      WebContentsDestroyed();
    }
  }
}

void WebContents::DestroyWebContents(bool async) {
  // This event is only for internal use, which is emitted when WebContents is
  // being destroyed.
  Emit("will-destroy");
  ResetManagedWebContents(async);
}

bool WebContents::DidAddMessageToConsole(
    content::WebContents* source,
    blink::mojom::ConsoleMessageLevel level,
    const base::string16& message,
    int32_t line_no,
    const base::string16& source_id) {
  return Emit("console-message", static_cast(level), message, line_no,
              source_id);
}

void WebContents::OnCreateWindow(
    const GURL& target_url,
    const content::Referrer& referrer,
    const std::string& frame_name,
    WindowOpenDisposition disposition,
    const std::vector<:>string>& features,
    const scoped_refptr<:resourcerequestbody>& body) {
  if (type_ == Type::BROWSER_WINDOW || type_ == Type::OFF_SCREEN)
    Emit("-new-window", target_url, frame_name, disposition, features, body,
         referrer);
  else
    Emit("new-window", target_url, frame_name, disposition, features);
}

void WebContents::WebContentsCreated(content::WebContents* source_contents,
                                     int opener_render_process_id,
                                     int opener_render_frame_id,
                                     const std::string& frame_name,
                                     const GURL& target_url,
                                     content::WebContents* new_contents) {
  ChildWebContentsTracker::CreateForWebContents(new_contents);
  auto* tracker = ChildWebContentsTracker::FromWebContents(new_contents);
  tracker->url = target_url;
  tracker->frame_name = frame_name;
}

void WebContents::AddNewContents(
    content::WebContents* source,
    std::unique_ptr<:webcontents> new_contents,
    WindowOpenDisposition disposition,
    const gfx::Rect& initial_rect,
    bool user_gesture,
    bool* was_blocked) {
  auto* tracker = ChildWebContentsTracker::FromWebContents(new_contents.get());
  DCHECK(tracker);

  v8::Locker locker(isolate());
  v8::HandleScope handle_scope(isolate());
  auto api_web_contents =
      CreateAndTake(isolate(), std::move(new_contents), Type::BROWSER_WINDOW);
  if (Emit("-add-new-contents", api_web_contents, disposition, user_gesture,
           initial_rect.x(), initial_rect.y(), initial_rect.width(),
           initial_rect.height(), tracker->url, tracker->frame_name)) {
    // TODO(zcbenz): Can we make this sync?
    api_web_contents->DestroyWebContents(true /* async */);
  }
}

content::WebContents* WebContents::OpenURLFromTab(
    content::WebContents* source,
    const content::OpenURLParams& params) {
  if (params.disposition != WindowOpenDisposition::CURRENT_TAB) {
    if (type_ == Type::BROWSER_WINDOW || type_ == Type::OFF_SCREEN)
      Emit("-new-window", params.url, "", params.disposition);
    else
      Emit("new-window", params.url, "", params.disposition);
    return nullptr;
  }

  // Give user a chance to cancel navigation.
  if (Emit("will-navigate", params.url))
    return nullptr;

  // Don‘t load the URL if the web contents was marked as destroyed from a
  // will-navigate event listener
  if (IsDestroyed())
    return nullptr;

  return CommonWebContentsDelegate::OpenURLFromTab(source, params);
}

void WebContents::BeforeUnloadFired(content::WebContents* tab,
                                    bool proceed,
                                    bool* proceed_to_fire_unload) {
  if (type_ == Type::BROWSER_WINDOW || type_ == Type::OFF_SCREEN)
    *proceed_to_fire_unload = proceed;
  else
    *proceed_to_fire_unload = true;
}

void WebContents::SetContentsBounds(content::WebContents* source,
                                    const gfx::Rect& pos) {
  Emit("move", pos);
}

void WebContents::CloseContents(content::WebContents* source) {
  Emit("close");

  auto* autofill_driver_factory =
      AutofillDriverFactory::FromWebContents(web_contents());
  if (autofill_driver_factory) {
    autofill_driver_factory->CloseAllPopups();
  }

  if (managed_web_contents())
    managed_web_contents()->GetView()->SetDelegate(nullptr);
  for (ExtendedWebContentsObserver& observer : observers_)
    observer.OnCloseContents();
}

void WebContents::ActivateContents(content::WebContents* source) {
  Emit("activate");
}

void WebContents::UpdateTargetURL(content::WebContents* source,
                                  const GURL& url) {
  Emit("update-target-url", url);
}

bool WebContents::HandleKeyboardEvent(
    content::WebContents* source,
    const content::NativeWebKeyboardEvent& event) {
  if (type_ == Type::WEB_VIEW && embedder_) {
    // Send the unhandled keyboard events back to the embedder.
    return embedder_->HandleKeyboardEvent(source, event);
  } else {
    // Go to the default keyboard handling.
    return CommonWebContentsDelegate::HandleKeyboardEvent(source, event);
  }
}

content::KeyboardEventProcessingResult WebContents::PreHandleKeyboardEvent(
    content::WebContents* source,
    const content::NativeWebKeyboardEvent& event) {
  if (event.GetType() == blink::WebInputEvent::Type::kRawKeyDown ||
      event.GetType() == blink::WebInputEvent::Type::kKeyUp) {
    bool prevent_default = Emit("before-input-event", event);
    if (prevent_default) {
      return content::KeyboardEventProcessingResult::HANDLED;
    }
  }

  return content::KeyboardEventProcessingResult::NOT_HANDLED;
}

void WebContents::ContentsZoomChange(bool zoom_in) {
  Emit("zoom-changed", zoom_in ? "in" : "out");
}

void WebContents::EnterFullscreenModeForTab(
    content::WebContents* source,
    const GURL& origin,
    const blink::mojom::FullscreenOptions& options) {
  auto* permission_helper =
      WebContentsPermissionHelper::FromWebContents(source);
  auto callback =
      base::BindRepeating(&WebContents::OnEnterFullscreenModeForTab,
                          base::Unretained(this), source, origin, options);
  permission_helper->RequestFullscreenPermission(callback);
}

void WebContents::OnEnterFullscreenModeForTab(
    content::WebContents* source,
    const