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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/screen_details/window_screen_details.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise_resolver.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_throw_dom_exception.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/modules/permissions/permission_utils.h"
#include "third_party/blink/renderer/modules/screen_details/screen_details.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/bindings/script_state.h"
namespace blink {
// static
const char WindowScreenDetails::kSupplementName[] = "WindowScreenDetails";
WindowScreenDetails::WindowScreenDetails(LocalDOMWindow* window)
: ExecutionContextLifecycleObserver(window),
Supplement<LocalDOMWindow>(*window),
permission_service_(window) {}
// static
ScriptPromise<ScreenDetails> WindowScreenDetails::getScreenDetails(
ScriptState* script_state,
LocalDOMWindow& window,
ExceptionState& exception_state) {
return From(&window)->GetScreenDetails(script_state, exception_state);
}
void WindowScreenDetails::ContextDestroyed() {
screen_details_.Clear();
}
void WindowScreenDetails::Trace(Visitor* visitor) const {
visitor->Trace(screen_details_);
visitor->Trace(permission_service_);
ExecutionContextLifecycleObserver::Trace(visitor);
Supplement<LocalDOMWindow>::Trace(visitor);
}
// static
WindowScreenDetails* WindowScreenDetails::From(LocalDOMWindow* window) {
auto* supplement =
Supplement<LocalDOMWindow>::From<WindowScreenDetails>(window);
if (!supplement) {
supplement = MakeGarbageCollected<WindowScreenDetails>(window);
Supplement<LocalDOMWindow>::ProvideTo(*window, supplement);
}
return supplement;
}
ScriptPromise<ScreenDetails> WindowScreenDetails::GetScreenDetails(
ScriptState* script_state,
ExceptionState& exception_state) {
if (!script_state->ContextIsValid()) {
exception_state.ThrowDOMException(DOMExceptionCode::kInvalidStateError,
"The execution context is not valid.");
return EmptyPromise();
}
LocalDOMWindow* window = LocalDOMWindow::From(script_state);
DCHECK(window->IsSecureContext()); // [SecureContext] in IDL.
if (!permission_service_.is_bound()) {
// See https://bit.ly/2S0zRAS for task types.
ConnectToPermissionService(
window, permission_service_.BindNewPipeAndPassReceiver(
window->GetTaskRunner(TaskType::kMiscPlatformAPI)));
}
auto permission_descriptor = CreatePermissionDescriptor(
mojom::blink::PermissionName::WINDOW_MANAGEMENT);
auto* resolver = MakeGarbageCollected<ScriptPromiseResolver<ScreenDetails>>(
script_state, exception_state.GetContext());
const bool has_transient_user_activation =
LocalFrame::HasTransientUserActivation(GetSupplementable()->GetFrame());
auto callback =
WTF::BindOnce(&WindowScreenDetails::OnPermissionInquiryComplete,
WrapPersistent(this), WrapPersistent(resolver),
/*permission_requested=*/has_transient_user_activation);
// Only request permission with transient activation, otherwise check quietly.
// This lets sites with permission get screen details any time (e.g. on load),
// but prevents sites from prompting users without a transient activation.
if (has_transient_user_activation) {
permission_service_->RequestPermission(std::move(permission_descriptor),
/*user_gesture=*/true,
std::move(callback));
} else {
permission_service_->HasPermission(std::move(permission_descriptor),
std::move(callback));
}
return resolver->Promise();
}
void WindowScreenDetails::OnPermissionInquiryComplete(
ScriptPromiseResolver<ScreenDetails>* resolver,
bool permission_requested,
mojom::blink::PermissionStatus status) {
if (!resolver->GetScriptState()->ContextIsValid())
return;
if (status != mojom::blink::PermissionStatus::GRANTED) {
auto* const isolate = resolver->GetScriptState()->GetIsolate();
ScriptState::Scope scope(resolver->GetScriptState());
resolver->Reject(V8ThrowDOMException::CreateOrEmpty(
isolate, DOMExceptionCode::kNotAllowedError,
(status == mojom::blink::PermissionStatus::ASK && !permission_requested)
? "Transient activation is required to request permission."
: "Permission denied."));
return;
}
if (!screen_details_)
screen_details_ = MakeGarbageCollected<ScreenDetails>(GetSupplementable());
resolver->Resolve(screen_details_);
}
} // namespace blink
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