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// Copyright 2017 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_MODULE_RECORD_H_
#define THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_MODULE_RECORD_H_
#include "third_party/blink/renderer/bindings/core/v8/script_source_location_type.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_code_cache.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/bindings/trace_wrapper_v8_reference.h"
#include "third_party/blink/renderer/platform/loader/fetch/cached_metadata_handler.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/text_position.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
#include "v8/include/v8.h"
namespace blink {
class ExceptionState;
class KURL;
class ScriptFetchOptions;
class ScriptState;
class ScriptValue;
class ScriptPromise;
// ModuleEvaluationResult encapsulates the result of a module evaluation.
// - Without top-level-await
// - succeed and not return a value, or
// (IsSuccess() == true), no return value is available.
// - throw any object.
// (IsException() == true && GetException()) returns the thrown exception
// - With top-level-await a module can either
// - return a promise, or
// (IsSuccess() == true && GetPromise()) returns a valid ScriptPromise())
// - throw any object.
// (IsException() == true && GetException()) returns the thrown exception
class CORE_EXPORT ModuleEvaluationResult final {
STACK_ALLOCATED();
public:
ModuleEvaluationResult() = delete;
static ModuleEvaluationResult Empty();
static ModuleEvaluationResult FromResult(v8::Local<v8::Value> promise);
static ModuleEvaluationResult FromException(v8::Local<v8::Value> exception);
ModuleEvaluationResult(const ModuleEvaluationResult& value) = default;
ModuleEvaluationResult& operator=(const ModuleEvaluationResult& value) =
default;
~ModuleEvaluationResult() = default;
ModuleEvaluationResult& Escape(ScriptState::EscapableScope* scope);
bool IsSuccess() const { return is_success_; }
bool IsException() const { return !is_success_; }
v8::Local<v8::Value> GetException() const;
ScriptPromise GetPromise(ScriptState* script_state) const;
private:
ModuleEvaluationResult(bool is_success, v8::Local<v8::Value> value)
: is_success_(is_success), value_(value) {}
bool is_success_;
v8::Local<v8::Value> value_;
};
// ModuleRecordProduceCacheData is a parameter object for
// ModuleRecord::ProduceCache().
class CORE_EXPORT ModuleRecordProduceCacheData final
: public GarbageCollected<ModuleRecordProduceCacheData> {
public:
ModuleRecordProduceCacheData(v8::Isolate*,
SingleCachedMetadataHandler*,
V8CodeCache::ProduceCacheOptions,
v8::Local<v8::Module>);
void Trace(Visitor*) const;
SingleCachedMetadataHandler* CacheHandler() const { return cache_handler_; }
V8CodeCache::ProduceCacheOptions GetProduceCacheOptions() const {
return produce_cache_options_;
}
v8::Local<v8::UnboundModuleScript> UnboundScript(v8::Isolate* isolate) const {
return unbound_script_.NewLocal(isolate);
}
private:
Member<SingleCachedMetadataHandler> cache_handler_;
V8CodeCache::ProduceCacheOptions produce_cache_options_;
// TODO(keishi): Visitor only defines a trace method for v8::Value so this
// needs to be cast.
GC_PLUGIN_IGNORE("757708")
TraceWrapperV8Reference<v8::UnboundModuleScript> unbound_script_;
};
// TODO(rikaf): Add a class level comment
class CORE_EXPORT ModuleRecord final {
STATIC_ONLY(ModuleRecord);
public:
static v8::Local<v8::Module> Compile(
v8::Isolate*,
const String& source,
const KURL& source_url,
const KURL& base_url,
const ScriptFetchOptions&,
const TextPosition&,
ExceptionState&,
V8CacheOptions = kV8CacheOptionsDefault,
SingleCachedMetadataHandler* = nullptr,
ScriptSourceLocationType source_location_type =
ScriptSourceLocationType::kInternal,
ModuleRecordProduceCacheData** out_produce_cache_data = nullptr);
// Returns exception, if any.
static ScriptValue Instantiate(ScriptState*,
v8::Local<v8::Module> record,
const KURL& source_url);
static ModuleEvaluationResult Evaluate(ScriptState*,
v8::Local<v8::Module> record,
const KURL& source_url);
static void ReportException(ScriptState*, v8::Local<v8::Value> exception);
static Vector<String> ModuleRequests(ScriptState*,
v8::Local<v8::Module> record);
static Vector<TextPosition> ModuleRequestPositions(
ScriptState*,
v8::Local<v8::Module> record);
static v8::Local<v8::Value> V8Namespace(v8::Local<v8::Module> record);
private:
static v8::MaybeLocal<v8::Module> ResolveModuleCallback(
v8::Local<v8::Context>,
v8::Local<v8::String> specifier,
v8::Local<v8::Module> referrer);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_MODULE_RECORD_H_
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