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// Copyright 2018 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 "third_party/blink/renderer/modules/keyboard/keyboard_lock.h"
#include "services/service_manager/public/cpp/interface_provider.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/core/dom/dom_exception.h"
#include "third_party/blink/renderer/core/dom/exception_code.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/platform/bindings/v8_binding.h"
#include "third_party/blink/renderer/platform/heap/persistent.h"
#include "third_party/blink/renderer/platform/wtf/assertions.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
namespace blink {
namespace {
constexpr char kFrameDetachedErrorMsg[] = "Current frame is detached.";
constexpr char kPromisePreemptedErrorMsg[] =
"This request has been superseded by a subsequent lock() method call.";
constexpr char kNoValidKeyCodesErrorMsg[] =
"No valid key codes passed into lock().";
constexpr char kChildFrameErrorMsg[] =
"lock() must be called from a top-level browsing context.";
constexpr char kRequestFailedErrorMsg[] =
"lock() request could not be registered.";
} // namespace
KeyboardLock::KeyboardLock(ExecutionContext* context)
: ContextLifecycleObserver(context) {}
KeyboardLock::~KeyboardLock() = default;
ScriptPromise KeyboardLock::lock(ScriptState* state,
const Vector<String>& keycodes) {
DCHECK(state);
if (!CalledFromSupportedContext(ExecutionContext::From(state))) {
return ScriptPromise::RejectWithDOMException(
state, DOMException::Create(kInvalidStateError, kChildFrameErrorMsg));
}
if (!EnsureServiceConnected()) {
return ScriptPromise::RejectWithDOMException(
state,
DOMException::Create(kInvalidStateError, kFrameDetachedErrorMsg));
}
request_keylock_resolver_ = ScriptPromiseResolver::Create(state);
service_->RequestKeyboardLock(
keycodes,
WTF::Bind(&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::EnsureServiceConnected() {
if (!service_) {
LocalFrame* frame = GetFrame();
if (!frame) {
return false;
}
frame->GetInterfaceProvider().GetInterface(mojo::MakeRequest(&service_));
}
DCHECK(service_);
return true;
}
bool KeyboardLock::CalledFromSupportedContext(ExecutionContext* context) {
// KeyboardLock API is only accessible from a top level browsing context.
LocalFrame* frame = GetFrame();
return frame && frame->IsMainFrame();
}
void KeyboardLock::LockRequestFinished(
ScriptPromiseResolver* 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->Reject(
DOMException::Create(kAbortError, kPromisePreemptedErrorMsg));
return;
}
switch (result) {
case mojom::KeyboardLockRequestResult::kSuccess:
request_keylock_resolver_->Resolve();
break;
case mojom::KeyboardLockRequestResult::kFrameDetachedError:
request_keylock_resolver_->Reject(
DOMException::Create(kInvalidStateError, kFrameDetachedErrorMsg));
break;
case mojom::KeyboardLockRequestResult::kNoValidKeyCodesError:
request_keylock_resolver_->Reject(
DOMException::Create(kInvalidAccessError, kNoValidKeyCodesErrorMsg));
break;
case mojom::KeyboardLockRequestResult::kChildFrameError:
request_keylock_resolver_->Reject(
DOMException::Create(kInvalidStateError, kChildFrameErrorMsg));
break;
case mojom::KeyboardLockRequestResult::kRequestFailedError:
request_keylock_resolver_->Reject(
DOMException::Create(kInvalidStateError, kRequestFailedErrorMsg));
break;
}
request_keylock_resolver_ = nullptr;
}
void KeyboardLock::Trace(blink::Visitor* visitor) {
visitor->Trace(request_keylock_resolver_);
ContextLifecycleObserver::Trace(visitor);
}
} // namespace blink
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