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// Copyright 2018 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/keyboard/keyboard_lock.h"
#include "third_party/blink/public/platform/browser_interface_broker_proxy.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/dom/dom_exception.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/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/bindings/v8_binding.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/persistent.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
namespace blink {
namespace {
constexpr char kKeyboardLockFrameDetachedErrorMsg[] =
"Current frame is detached.";
constexpr char kKeyboardLockPromisePreemptedErrorMsg[] =
"This request has been superseded by a subsequent lock() method call.";
constexpr char kKeyboardLockNoValidKeyCodesErrorMsg[] =
"No valid key codes passed into lock().";
constexpr char kKeyboardLockChildFrameErrorMsg[] =
"lock() must be called from a primary top-level browsing context.";
constexpr char kKeyboardLockRequestFailedErrorMsg[] =
"lock() request could not be registered.";
} // namespace
KeyboardLock::KeyboardLock(ExecutionContext* context)
: ExecutionContextClient(context), service_(context) {}
KeyboardLock::~KeyboardLock() = default;
ScriptPromise<IDLUndefined> KeyboardLock::lock(
ScriptState* state,
const Vector<String>& keycodes,
ExceptionState& exception_state) {
DCHECK(state);
if (!IsLocalFrameAttached()) {
exception_state.ThrowDOMException(DOMExceptionCode::kInvalidStateError,
kKeyboardLockFrameDetachedErrorMsg);
return EmptyPromise();
}
if (!CalledFromSupportedContext(ExecutionContext::From(state))) {
exception_state.ThrowDOMException(DOMExceptionCode::kInvalidStateError,
kKeyboardLockChildFrameErrorMsg);
return EmptyPromise();
}
if (!EnsureServiceConnected()) {
exception_state.ThrowDOMException(DOMExceptionCode::kInvalidStateError,
kKeyboardLockRequestFailedErrorMsg);
return EmptyPromise();
}
request_keylock_resolver_ =
MakeGarbageCollected<ScriptPromiseResolver<IDLUndefined>>(state);
service_->RequestKeyboardLock(
keycodes,
WTF::BindOnce(&KeyboardLock::LockRequestFinished, WrapPersistent(this),
WrapPersistent(request_keylock_resolver_.Get())));
return request_keylock_resolver_->Promise();
}
void KeyboardLock::unlock(ScriptState* state) {
DCHECK(state);
if (!CalledFromSupportedContext(ExecutionContext::From(state)))
return;
if (!EnsureServiceConnected())
return;
service_->CancelKeyboardLock();
}
bool KeyboardLock::IsLocalFrameAttached() {
return DomWindow();
}
bool KeyboardLock::EnsureServiceConnected() {
if (!service_.is_bound()) {
if (!DomWindow())
return false;
// See https://bit.ly/2S0zRAS for task types.
DomWindow()->GetBrowserInterfaceBroker().GetInterface(
service_.BindNewPipeAndPassReceiver(
DomWindow()->GetTaskRunner(TaskType::kMiscPlatformAPI)));
DCHECK(service_.is_bound());
}
return true;
}
bool KeyboardLock::CalledFromSupportedContext(ExecutionContext* context) {
DCHECK(context);
// This API is only accessible from an outermost main frame, secure browsing
// context.
return DomWindow() && DomWindow()->GetFrame()->IsOutermostMainFrame() &&
context->IsSecureContext();
}
void KeyboardLock::LockRequestFinished(
ScriptPromiseResolver<IDLUndefined>* resolver,
mojom::KeyboardLockRequestResult result) {
DCHECK(request_keylock_resolver_);
// If |resolver| is not the current promise, then reject the promise.
if (resolver != request_keylock_resolver_) {
resolver->RejectWithDOMException(DOMExceptionCode::kAbortError,
kKeyboardLockPromisePreemptedErrorMsg);
return;
}
switch (result) {
case mojom::blink::KeyboardLockRequestResult::kSuccess:
resolver->Resolve();
break;
case mojom::blink::KeyboardLockRequestResult::kFrameDetachedError:
resolver->RejectWithDOMException(DOMExceptionCode::kInvalidStateError,
kKeyboardLockFrameDetachedErrorMsg);
break;
case mojom::blink::KeyboardLockRequestResult::kNoValidKeyCodesError:
resolver->RejectWithDOMException(DOMExceptionCode::kInvalidAccessError,
kKeyboardLockNoValidKeyCodesErrorMsg);
break;
case mojom::blink::KeyboardLockRequestResult::kChildFrameError:
resolver->RejectWithDOMException(DOMExceptionCode::kInvalidStateError,
kKeyboardLockChildFrameErrorMsg);
break;
case mojom::blink::KeyboardLockRequestResult::kRequestFailedError:
resolver->RejectWithDOMException(DOMExceptionCode::kInvalidStateError,
kKeyboardLockRequestFailedErrorMsg);
break;
}
request_keylock_resolver_ = nullptr;
}
void KeyboardLock::Trace(Visitor* visitor) const {
visitor->Trace(service_);
visitor->Trace(request_keylock_resolver_);
ExecutionContextClient::Trace(visitor);
}
} // namespace blink
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