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// Copyright 2016 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/shapedetection/barcode_detector.h"
#include <utility>
#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/bindings/modules/v8/v8_barcode_detector_options.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_detected_barcode.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_point_2d.h"
#include "third_party/blink/renderer/core/dom/dom_exception.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/geometry/dom_rect.h"
#include "third_party/blink/renderer/core/workers/worker_thread.h"
#include "third_party/blink/renderer/modules/canvas/imagebitmap/image_bitmap_source_util.h"
#include "third_party/blink/renderer/modules/shapedetection/barcode_detector_statics.h"
#include "third_party/blink/renderer/platform/bindings/enumeration_base.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
namespace blink {
namespace {
shape_detection::mojom::blink::BarcodeFormat StringToBarcodeFormat(
const WebString& format_string) {
if (format_string == "aztec")
return shape_detection::mojom::blink::BarcodeFormat::AZTEC;
if (format_string == "code_128")
return shape_detection::mojom::blink::BarcodeFormat::CODE_128;
if (format_string == "code_39")
return shape_detection::mojom::blink::BarcodeFormat::CODE_39;
if (format_string == "code_93")
return shape_detection::mojom::blink::BarcodeFormat::CODE_93;
if (format_string == "codabar")
return shape_detection::mojom::blink::BarcodeFormat::CODABAR;
if (format_string == "data_matrix")
return shape_detection::mojom::blink::BarcodeFormat::DATA_MATRIX;
if (format_string == "ean_13")
return shape_detection::mojom::blink::BarcodeFormat::EAN_13;
if (format_string == "ean_8")
return shape_detection::mojom::blink::BarcodeFormat::EAN_8;
if (format_string == "itf")
return shape_detection::mojom::blink::BarcodeFormat::ITF;
if (format_string == "pdf417")
return shape_detection::mojom::blink::BarcodeFormat::PDF417;
if (format_string == "qr_code")
return shape_detection::mojom::blink::BarcodeFormat::QR_CODE;
if (format_string == "upc_a")
return shape_detection::mojom::blink::BarcodeFormat::UPC_A;
if (format_string == "upc_e")
return shape_detection::mojom::blink::BarcodeFormat::UPC_E;
return shape_detection::mojom::blink::BarcodeFormat::UNKNOWN;
}
} // anonymous namespace
BarcodeDetector* BarcodeDetector::Create(ExecutionContext* context,
const BarcodeDetectorOptions* options,
ExceptionState& exception_state) {
return MakeGarbageCollected<BarcodeDetector>(context, options,
exception_state);
}
BarcodeDetector::BarcodeDetector(ExecutionContext* context,
const BarcodeDetectorOptions* options,
ExceptionState& exception_state)
: service_(context) {
auto barcode_detector_options =
shape_detection::mojom::blink::BarcodeDetectorOptions::New();
if (options->hasFormats()) {
// TODO(https://github.com/WICG/shape-detection-api/issues/66):
// potentially process UNKNOWN as platform-specific formats.
for (const auto& format_string : options->formats()) {
auto format = StringToBarcodeFormat(IDLEnumAsString(format_string));
if (format != shape_detection::mojom::blink::BarcodeFormat::UNKNOWN)
barcode_detector_options->formats.push_back(format);
}
if (barcode_detector_options->formats.empty()) {
exception_state.ThrowTypeError("Hint option provided, but is empty.");
return;
}
}
// See https://bit.ly/2S0zRAS for task types.
auto task_runner = context->GetTaskRunner(TaskType::kMiscPlatformAPI);
BarcodeDetectorStatics::From(context)->CreateBarcodeDetection(
service_.BindNewPipeAndPassReceiver(task_runner),
std::move(barcode_detector_options));
service_.set_disconnect_handler(WTF::BindOnce(
&BarcodeDetector::OnConnectionError, WrapWeakPersistent(this)));
}
// static
ScriptPromise<IDLSequence<V8BarcodeFormat>>
BarcodeDetector::getSupportedFormats(ScriptState* script_state) {
ExecutionContext* context = ExecutionContext::From(script_state);
return BarcodeDetectorStatics::From(context)->EnumerateSupportedFormats(
script_state);
}
// static
V8BarcodeFormat::Enum BarcodeDetector::BarcodeFormatToEnum(
const shape_detection::mojom::BarcodeFormat format) {
switch (format) {
case shape_detection::mojom::BarcodeFormat::AZTEC:
return V8BarcodeFormat::Enum::kAztec;
case shape_detection::mojom::BarcodeFormat::CODE_128:
return V8BarcodeFormat::Enum::kCode128;
case shape_detection::mojom::BarcodeFormat::CODE_39:
return V8BarcodeFormat::Enum::kCode39;
case shape_detection::mojom::BarcodeFormat::CODE_93:
return V8BarcodeFormat::Enum::kCode93;
case shape_detection::mojom::BarcodeFormat::CODABAR:
return V8BarcodeFormat::Enum::kCodabar;
case shape_detection::mojom::BarcodeFormat::DATA_MATRIX:
return V8BarcodeFormat::Enum::kDataMatrix;
case shape_detection::mojom::BarcodeFormat::EAN_13:
return V8BarcodeFormat::Enum::kEan13;
case shape_detection::mojom::BarcodeFormat::EAN_8:
return V8BarcodeFormat::Enum::kEan8;
case shape_detection::mojom::BarcodeFormat::ITF:
return V8BarcodeFormat::Enum::kItf;
case shape_detection::mojom::BarcodeFormat::PDF417:
return V8BarcodeFormat::Enum::kPdf417;
case shape_detection::mojom::BarcodeFormat::QR_CODE:
return V8BarcodeFormat::Enum::kQrCode;
case shape_detection::mojom::BarcodeFormat::UNKNOWN:
return V8BarcodeFormat::Enum::kUnknown;
case shape_detection::mojom::BarcodeFormat::UPC_A:
return V8BarcodeFormat::Enum::kUpcA;
case shape_detection::mojom::BarcodeFormat::UPC_E:
return V8BarcodeFormat::Enum::kUpcE;
}
}
ScriptPromise<IDLSequence<DetectedBarcode>> BarcodeDetector::detect(
ScriptState* script_state,
const V8ImageBitmapSource* image_source,
ExceptionState& exception_state) {
std::optional<SkBitmap> bitmap = GetBitmapFromV8ImageBitmapSource(
script_state, image_source, exception_state);
if (!bitmap) {
return ScriptPromise<IDLSequence<DetectedBarcode>>();
}
auto* resolver =
MakeGarbageCollected<ScriptPromiseResolver<IDLSequence<DetectedBarcode>>>(
script_state, exception_state.GetContext());
auto promise = resolver->Promise();
if (bitmap->isNull()) {
resolver->Resolve(HeapVector<Member<DetectedBarcode>>());
return promise;
}
if (!service_.is_bound()) {
resolver->RejectWithDOMException(DOMExceptionCode::kNotSupportedError,
"Barcode detection service unavailable.");
return promise;
}
detect_requests_.insert(resolver);
service_->Detect(
std::move(*bitmap),
WTF::BindOnce(&BarcodeDetector::OnDetectBarcodes, WrapPersistent(this),
WrapPersistent(resolver)));
return promise;
}
void BarcodeDetector::OnDetectBarcodes(
ScriptPromiseResolver<IDLSequence<DetectedBarcode>>* resolver,
Vector<shape_detection::mojom::blink::BarcodeDetectionResultPtr>
barcode_detection_results) {
DCHECK(detect_requests_.Contains(resolver));
detect_requests_.erase(resolver);
HeapVector<Member<DetectedBarcode>> detected_barcodes;
for (const auto& barcode : barcode_detection_results) {
HeapVector<Member<Point2D>> corner_points;
for (const auto& corner_point : barcode->corner_points) {
Point2D* point = Point2D::Create();
point->setX(corner_point.x());
point->setY(corner_point.y());
corner_points.push_back(point);
}
DetectedBarcode* detected_barcode = DetectedBarcode::Create();
detected_barcode->setRawValue(barcode->raw_value);
detected_barcode->setBoundingBox(DOMRectReadOnly::Create(
barcode->bounding_box.x(), barcode->bounding_box.y(),
barcode->bounding_box.width(), barcode->bounding_box.height()));
detected_barcode->setFormat(BarcodeFormatToEnum(barcode->format));
detected_barcode->setCornerPoints(corner_points);
detected_barcodes.push_back(detected_barcode);
}
resolver->Resolve(detected_barcodes);
}
void BarcodeDetector::OnConnectionError() {
service_.reset();
HeapHashSet<Member<ScriptPromiseResolverBase>> resolvers;
resolvers.swap(detect_requests_);
for (const auto& resolver : resolvers) {
// Check if callback's resolver is still valid.
if (!IsInParallelAlgorithmRunnable(resolver->GetExecutionContext(),
resolver->GetScriptState())) {
continue;
}
// Enter into resolver's context to support creating DOMException.
ScriptState::Scope script_state_scope(resolver->GetScriptState());
resolver->Reject(V8ThrowDOMException::CreateOrDie(
resolver->GetScriptState()->GetIsolate(),
DOMExceptionCode::kNotSupportedError,
"Barcode Detection not implemented."));
}
}
void BarcodeDetector::Trace(Visitor* visitor) const {
ScriptWrappable::Trace(visitor);
visitor->Trace(service_);
visitor->Trace(detect_requests_);
}
} // namespace blink
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