| // 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_SCRIPT_MODULE_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_SCRIPT_MODULE_H_ |
| |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/platform/bindings/shared_persistent.h" |
| #include "third_party/blink/renderer/platform/loader/fetch/access_control_status.h" |
| #include "third_party/blink/renderer/platform/wtf/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; |
| |
| // ScriptModule wraps a handle to a v8::Module for use in core. |
| // |
| // Using ScriptModules needs a ScriptState and its scope to operate in. You |
| // should always provide the same ScriptState and not try to reuse ScriptModules |
| // across different contexts. |
| // Currently all ScriptModule users can easily access its context Modulator, so |
| // we use it to fill ScriptState in. |
| class CORE_EXPORT ScriptModule final { |
| DISALLOW_NEW(); |
| |
| public: |
| static ScriptModule Compile(v8::Isolate*, |
| const String& source, |
| const KURL& source_url, |
| const KURL& base_url, |
| const ScriptFetchOptions&, |
| AccessControlStatus, |
| const TextPosition&, |
| ExceptionState&); |
| |
| // TODO(kouhei): Remove copy ctor |
| ScriptModule(); |
| ~ScriptModule(); |
| |
| ScriptModule(v8::Isolate*, v8::Local<v8::Module>, const KURL&); |
| |
| // Returns exception, if any. |
| ScriptValue Instantiate(ScriptState*); |
| |
| // Returns exception, if any. |
| ScriptValue Evaluate(ScriptState*) const; |
| static void ReportException(ScriptState*, v8::Local<v8::Value> exception); |
| |
| Vector<String> ModuleRequests(ScriptState*); |
| Vector<TextPosition> ModuleRequestPositions(ScriptState*); |
| |
| inline bool operator==(const blink::ScriptModule& other) const; |
| bool operator!=(const blink::ScriptModule& other) const { |
| return !(*this == other); |
| } |
| |
| bool IsNull() const { return !module_ || module_->IsEmpty(); } |
| |
| v8::Local<v8::Value> V8Namespace(v8::Isolate*); |
| |
| private: |
| // ModuleScript instances store their record as |
| // TraceWrapperV8Reference<v8::Module>, and reconstructs ScriptModule from it. |
| friend class ModuleScript; |
| |
| v8::Local<v8::Module> NewLocal(v8::Isolate* isolate) { |
| return module_->NewLocal(isolate); |
| } |
| |
| static v8::MaybeLocal<v8::Module> ResolveModuleCallback( |
| v8::Local<v8::Context>, |
| v8::Local<v8::String> specifier, |
| v8::Local<v8::Module> referrer); |
| |
| scoped_refptr<SharedPersistent<v8::Module>> module_; |
| unsigned identity_hash_ = 0; |
| String source_url_; |
| |
| friend struct ScriptModuleHash; |
| friend struct WTF::HashTraits<blink::ScriptModule>; |
| }; |
| |
| struct ScriptModuleHash { |
| STATIC_ONLY(ScriptModuleHash); |
| |
| public: |
| static unsigned GetHash(const blink::ScriptModule& key) { |
| return key.identity_hash_; |
| } |
| |
| static bool Equal(const blink::ScriptModule& a, |
| const blink::ScriptModule& b) { |
| return a == b; |
| } |
| |
| static constexpr bool safe_to_compare_to_empty_or_deleted = true; |
| }; |
| |
| } // namespace blink |
| |
| namespace WTF { |
| |
| template <> |
| struct DefaultHash<blink::ScriptModule> { |
| using Hash = blink::ScriptModuleHash; |
| }; |
| |
| template <> |
| struct HashTraits<blink::ScriptModule> |
| : public SimpleClassHashTraits<blink::ScriptModule> { |
| static bool IsDeletedValue(const blink::ScriptModule& value) { |
| return HashTraits<scoped_refptr<blink::SharedPersistent<v8::Module>>>:: |
| IsDeletedValue(value.module_); |
| } |
| |
| static void ConstructDeletedValue(blink::ScriptModule& slot, |
| bool zero_value) { |
| HashTraits<scoped_refptr<blink::SharedPersistent<v8::Module>>>:: |
| ConstructDeletedValue(slot.module_, zero_value); |
| } |
| }; |
| |
| } // namespace WTF |
| |
| namespace blink { |
| |
| inline bool ScriptModule::operator==(const ScriptModule& other) const { |
| if (HashTraits<ScriptModule>::IsDeletedValue(*this) && |
| HashTraits<ScriptModule>::IsDeletedValue(other)) |
| return true; |
| |
| if (HashTraits<ScriptModule>::IsDeletedValue(*this) || |
| HashTraits<ScriptModule>::IsDeletedValue(other)) |
| return false; |
| |
| blink::SharedPersistent<v8::Module>* left = module_.get(); |
| blink::SharedPersistent<v8::Module>* right = other.module_.get(); |
| if (left == right) |
| return true; |
| if (!left || !right) |
| return false; |
| return *left == *right; |
| } |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_BINDINGS_CORE_V8_SCRIPT_MODULE_H_ |