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// Copyright 2019 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/xr/xr_transient_input_hit_test_source.h"
#include "third_party/blink/renderer/modules/xr/xr_input_source_array.h"
#include "third_party/blink/renderer/modules/xr/xr_session.h"
#include "third_party/blink/renderer/modules/xr/xr_transient_input_hit_test_result.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "device/vr/public/mojom/vr_service.mojom-blink.h"
namespace {
const char* kCannotCancelHitTestSource =
"Hit test source could not be canceled. Ensure that it was not already "
"canceled.";
}
namespace blink {
XRTransientInputHitTestSource::XRTransientInputHitTestSource(
uint64_t id,
XRSession* xr_session)
: id_(id), xr_session_(xr_session) {
DCHECK(xr_session_);
}
uint64_t XRTransientInputHitTestSource::id() const {
return id_;
}
void XRTransientInputHitTestSource::cancel(ExceptionState& exception_state) {
if (!xr_session_->RemoveHitTestSource(this)) {
exception_state.ThrowDOMException(DOMExceptionCode::kInvalidStateError,
kCannotCancelHitTestSource);
}
}
void XRTransientInputHitTestSource::Update(
const HashMap<uint32_t, Vector<device::mojom::blink::XRHitResultPtr>>&
hit_test_results,
XRInputSourceArray* input_source_array) {
// TODO: Be smarter about the update - it's possible to add new resulst /
// remove the ones that were removed & update the ones that are being changed.
current_frame_results_.clear();
// If we don't know anything about input sources, we won't be able to
// construct any results so we are done (and current_frame_results_ should
// stay empty).
if (!input_source_array) {
return;
}
for (const auto& source_id_and_results : hit_test_results) {
XRInputSource* input_source =
input_source_array->GetWithSourceId(source_id_and_results.key);
// If the input source with the given ID could not be found, just skip
// processing results for this input source.
if (!input_source)
continue;
// If the input source is not visible, ignore it.
if (input_source->IsVisible()) {
current_frame_results_.push_back(
MakeGarbageCollected<XRTransientInputHitTestResult>(
input_source, source_id_and_results.value));
}
}
}
HeapVector<Member<XRTransientInputHitTestResult>>
XRTransientInputHitTestSource::Results() {
return current_frame_results_;
}
void XRTransientInputHitTestSource::Trace(Visitor* visitor) const {
visitor->Trace(current_frame_results_);
visitor->Trace(xr_session_);
ScriptWrappable::Trace(visitor);
}
} // namespace blink
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