// Copyright 2022 The Chromium Embedded Framework Authors. Portions copyright // 2016 The Chromium Authors. All rights reserved. Use of this source code is // governed by a BSD-style license that can be found in the LICENSE file. #include "libcef/browser/permission_prompt.h" #include "libcef/browser/browser_host_base.h" #include "libcef/features/runtime.h" #include "base/logging.h" #include "base/memory/weak_ptr.h" #include "base/notreached.h" #include "chrome/browser/ui/permission_bubble/permission_prompt.h" namespace permission_prompt { namespace { uint64_t g_next_prompt_id = 0; using DelegateCallback = base::OnceCallback; class CefPermissionPromptCallbackImpl : public CefPermissionPromptCallback { public: using CallbackType = base::OnceCallback; explicit CefPermissionPromptCallbackImpl(CallbackType&& callback) : callback_(std::move(callback)) {} CefPermissionPromptCallbackImpl(const CefPermissionPromptCallbackImpl&) = delete; CefPermissionPromptCallbackImpl& operator=( const CefPermissionPromptCallbackImpl&) = delete; // Don't need to execute the callback in this destructor because this object // will always be kept alive until after the CefPermissionPrompt is destroyed, // and that object will disconnect/execute the callback in its destructor. ~CefPermissionPromptCallbackImpl() override = default; void Continue(cef_permission_request_result_t result) override { if (CEF_CURRENTLY_ON_UIT()) { if (!callback_.is_null()) { auto callback = base::BindOnce(std::move(callback_), result, /*notify_delegate=*/true); if (safe_to_run_sync_) { std::move(callback).Run(); } else { CEF_POST_TASK(CEF_UIT, std::move(callback)); } } } else { CEF_POST_TASK(CEF_UIT, base::BindOnce(&CefPermissionPromptCallbackImpl::Continue, this, result)); } } [[nodiscard]] CallbackType Disconnect() { return std::move(callback_); } bool IsDisconnected() const { return callback_.is_null(); } void MarkSafeToRunSync() { safe_to_run_sync_ = true; } private: // Callback execution from inside CreatePermissionPromptImpl must be async, // otherwise PermissionRequestManager state will be incorrect. bool safe_to_run_sync_ = false; CallbackType callback_; IMPLEMENT_REFCOUNTING(CefPermissionPromptCallbackImpl); }; // Implementation based on PermissionPromptAndroid. class CefPermissionPrompt : public permissions::PermissionPrompt { public: explicit CefPermissionPrompt(Delegate* delegate) : delegate_(delegate) { DCHECK(delegate_); } CefPermissionPrompt(const CefPermissionPrompt&) = delete; CefPermissionPrompt& operator=(const CefPermissionPrompt&) = delete; // Expect to be destroyed (and the UI needs to go) when: // 1. A navigation happens, tab/webcontents is being closed; with the current // GetTabSwitchingBehavior() implementation, this instance survives the tab // being backgrounded. // 2. The permission request is resolved (accept, deny, dismiss). // 3. A higher priority request comes in. ~CefPermissionPrompt() override { CEF_REQUIRE_UIT(); if (callback_) { // If the callback is non-null at this point then we still need to execute // it in order to notify the client. auto callback = callback_->Disconnect(); if (!callback.is_null()) { std::move(callback).Run(CEF_PERMISSION_RESULT_IGNORE, /*notify_delegate=*/false); } } } // Used to associate the client callback when OnShowPermissionPrompt is // handled. void AttachClientCallback( CefRefPtr callback) { DCHECK(callback); callback_ = callback; callback_->MarkSafeToRunSync(); } // Used to tie Delegate access to this object's lifespan. DelegateCallback MakeDelegateCallback() { return base::BindOnce(&CefPermissionPrompt::NotifyDelegate, weak_ptr_factory_.GetWeakPtr()); } // PermissionPrompt methods: bool UpdateAnchor() override { return true; } TabSwitchingBehavior GetTabSwitchingBehavior() override { return TabSwitchingBehavior::kKeepPromptAlive; } permissions::PermissionPromptDisposition GetPromptDisposition() const override { return permissions::PermissionPromptDisposition::CUSTOM_MODAL_DIALOG; } private: // We don't expose AcceptThisTime() because it's a special case for // Geolocation (see DCHECK in PrefProvider::SetWebsiteSetting). void NotifyDelegate(cef_permission_request_result_t result) { switch (result) { case CEF_PERMISSION_RESULT_ACCEPT: delegate_->Accept(); break; case CEF_PERMISSION_RESULT_DENY: delegate_->Deny(); break; case CEF_PERMISSION_RESULT_DISMISS: delegate_->Dismiss(); break; case CEF_PERMISSION_RESULT_IGNORE: delegate_->Ignore(); break; } } // |delegate_| is the PermissionRequestManager, which owns this object. const raw_ptr delegate_; CefRefPtr callback_; base::WeakPtrFactory weak_ptr_factory_{this}; }; // |notify_delegate| will be false if called from the CefPermissionPrompt // destructor. void ExecuteResult(CefRefPtr browser, uint64_t prompt_id, DelegateCallback delegate_callback, cef_permission_request_result_t result, bool notify_delegate) { CEF_REQUIRE_UIT(); if (auto client = browser->GetClient()) { if (auto handler = client->GetPermissionHandler()) { handler->OnDismissPermissionPrompt(browser, prompt_id, result); } } if (notify_delegate) { // Will be a no-op if this executes after the CefPermissionPrompt was // destroyed. std::move(delegate_callback).Run(result); } } cef_permission_request_types_t GetCefRequestType( permissions::RequestType type) { switch (type) { case permissions::RequestType::kAccessibilityEvents: return CEF_PERMISSION_TYPE_ACCESSIBILITY_EVENTS; case permissions::RequestType::kArSession: return CEF_PERMISSION_TYPE_AR_SESSION; case permissions::RequestType::kCameraPanTiltZoom: return CEF_PERMISSION_TYPE_CAMERA_PAN_TILT_ZOOM; case permissions::RequestType::kCameraStream: return CEF_PERMISSION_TYPE_CAMERA_STREAM; case permissions::RequestType::kClipboard: return CEF_PERMISSION_TYPE_CLIPBOARD; case permissions::RequestType::kDiskQuota: return CEF_PERMISSION_TYPE_DISK_QUOTA; case permissions::RequestType::kLocalFonts: return CEF_PERMISSION_TYPE_LOCAL_FONTS; case permissions::RequestType::kGeolocation: return CEF_PERMISSION_TYPE_GEOLOCATION; case permissions::RequestType::kIdleDetection: return CEF_PERMISSION_TYPE_IDLE_DETECTION; case permissions::RequestType::kMicStream: return CEF_PERMISSION_TYPE_MIC_STREAM; case permissions::RequestType::kMidiSysex: return CEF_PERMISSION_TYPE_MIDI_SYSEX; case permissions::RequestType::kMultipleDownloads: return CEF_PERMISSION_TYPE_MULTIPLE_DOWNLOADS; case permissions::RequestType::kNotifications: return CEF_PERMISSION_TYPE_NOTIFICATIONS; #if BUILDFLAG(IS_WIN) case permissions::RequestType::kProtectedMediaIdentifier: return CEF_PERMISSION_TYPE_PROTECTED_MEDIA_IDENTIFIER; #endif case permissions::RequestType::kRegisterProtocolHandler: return CEF_PERMISSION_TYPE_REGISTER_PROTOCOL_HANDLER; case permissions::RequestType::kSecurityAttestation: return CEF_PERMISSION_TYPE_SECURITY_ATTESTATION; case permissions::RequestType::kStorageAccess: return CEF_PERMISSION_TYPE_STORAGE_ACCESS; case permissions::RequestType::kU2fApiRequest: return CEF_PERMISSION_TYPE_U2F_API_REQUEST; case permissions::RequestType::kVrSession: return CEF_PERMISSION_TYPE_VR_SESSION; case permissions::RequestType::kWindowManagement: return CEF_PERMISSION_TYPE_WINDOW_MANAGEMENT; } NOTREACHED(); return CEF_PERMISSION_TYPE_NONE; } uint32_t GetRequestedPermissions( permissions::PermissionPrompt::Delegate* delegate) { uint32_t permissions = CEF_PERMISSION_TYPE_NONE; for (const auto* request : delegate->Requests()) { permissions |= GetCefRequestType(request->request_type()); } return permissions; } std::unique_ptr CreatePermissionPromptImpl( content::WebContents* web_contents, permissions::PermissionPrompt::Delegate* delegate, bool* default_handling) { CEF_REQUIRE_UIT(); if (auto browser = CefBrowserHostBase::GetBrowserForContents(web_contents)) { if (auto client = browser->GetClient()) { if (auto handler = client->GetPermissionHandler()) { auto permission_prompt = std::make_unique(delegate); const auto prompt_id = ++g_next_prompt_id; auto callback = base::BindOnce(&ExecuteResult, browser, prompt_id, permission_prompt->MakeDelegateCallback()); CefRefPtr callbackImpl( new CefPermissionPromptCallbackImpl(std::move(callback))); bool handled = handler->OnShowPermissionPrompt( browser, prompt_id, delegate->GetRequestingOrigin().spec(), GetRequestedPermissions(delegate), callbackImpl.get()); if (callbackImpl->IsDisconnected() || handled) { // Callback execution will be async. LOG_IF(ERROR, !handled) << "Should return true from OnShowPermissionPrompt when " "executing the callback"; *default_handling = false; permission_prompt->AttachClientCallback(callbackImpl); return permission_prompt; } else { // Proceed with default handling. |callback| is discarded without // execution. callback = callbackImpl->Disconnect(); } } } } if (cef::IsAlloyRuntimeEnabled()) { LOG(INFO) << "Implement OnShowPermissionPrompt to override default IGNORE " "handling of permission prompts."; } // Proceed with default handling. This will be IGNORE with the Alloy runtime // and default UI prompt with the Chrome runtime. *default_handling = true; return nullptr; } } // namespace void RegisterCreateCallback() { SetCreatePermissionPromptFunction(&CreatePermissionPromptImpl); } } // namespace permission_prompt