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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/bindings/core/v8/dictionary.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_script_runner.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_string_resource.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
namespace blink {
Dictionary::Dictionary(v8::Isolate* isolate,
v8::Local<v8::Value> dictionary_object,
ExceptionState& exception_state)
: isolate_(isolate) {
DCHECK(isolate);
// https://webidl.spec.whatwg.org/#es-dictionary
// Type of an ECMAScript value must be Undefined, Null or Object.
if (dictionary_object.IsEmpty() || dictionary_object->IsUndefined()) {
value_type_ = ValueType::kUndefined;
return;
}
if (dictionary_object->IsNull()) {
value_type_ = ValueType::kNull;
return;
}
if (dictionary_object->IsObject()) {
value_type_ = ValueType::kObject;
dictionary_object_ = dictionary_object.As<v8::Object>();
return;
}
exception_state.ThrowTypeError(
"The dictionary provided is neither undefined, null nor an Object.");
}
bool Dictionary::HasProperty(const StringView& key,
ExceptionState& exception_state) const {
if (dictionary_object_.IsEmpty())
return false;
TryRethrowScope rethrow_scope(isolate_, exception_state);
bool has_key = false;
if (!dictionary_object_->Has(V8Context(), V8String(isolate_, key))
.To(&has_key)) {
return false;
}
return has_key;
}
bool Dictionary::Get(const StringView& key, Dictionary& value) const {
v8::Local<v8::Value> v8_value;
if (!Get(key, v8_value))
return false;
if (v8_value->IsObject()) {
DCHECK(isolate_);
DCHECK(isolate_->IsCurrent());
// TODO(bashi,yukishiino): Should rethrow the exception.
// http://crbug.com/666661
DummyExceptionStateForTesting exception_state;
value = Dictionary(isolate_, v8_value, exception_state);
}
return true;
}
bool Dictionary::Get(v8::Local<v8::Value> key,
v8::Local<v8::Value>& result) const {
if (dictionary_object_.IsEmpty())
return false;
// Swallow possible exceptions in v8::Object::Get() and Has().
// TODO(bashi,yukishiino): Should rethrow the exception.
// http://crbug.com/666661
v8::TryCatch try_catch(GetIsolate());
bool has_property;
if (!dictionary_object_->Has(V8Context(), key).To(&has_property) ||
!has_property)
return false;
return dictionary_object_->Get(V8Context(), key).ToLocal(&result);
}
bool Dictionary::GetInternal(const v8::Local<v8::Value>& key,
v8::Local<v8::Value>& result,
ExceptionState& exception_state) const {
if (dictionary_object_.IsEmpty())
return false;
TryRethrowScope rethrow_scope(GetIsolate(), exception_state);
bool has_key = false;
if (!dictionary_object_->Has(V8Context(), key).To(&has_key)) {
DCHECK(rethrow_scope.HasCaught());
return false;
}
DCHECK(!rethrow_scope.HasCaught());
if (!has_key)
return false;
if (!dictionary_object_->Get(V8Context(), key).ToLocal(&result)) {
DCHECK(rethrow_scope.HasCaught());
return false;
}
DCHECK(!rethrow_scope.HasCaught());
return true;
}
[[nodiscard]] static v8::MaybeLocal<v8::String> GetStringValueInArray(
v8::Local<v8::Context> context,
v8::Local<v8::Array> array,
uint32_t index) {
v8::Local<v8::Value> value;
if (!array->Get(context, index).ToLocal(&value))
return v8::MaybeLocal<v8::String>();
return value->ToString(context);
}
HashMap<String, String> Dictionary::GetOwnPropertiesAsStringHashMap(
ExceptionState& exception_state) const {
if (dictionary_object_.IsEmpty())
return HashMap<String, String>();
TryRethrowScope rethrow_scope(GetIsolate(), exception_state);
v8::Local<v8::Array> property_names;
if (!dictionary_object_->GetOwnPropertyNames(V8Context())
.ToLocal(&property_names)) {
return HashMap<String, String>();
}
HashMap<String, String> own_properties;
for (uint32_t i = 0; i < property_names->Length(); ++i) {
v8::Local<v8::String> key;
if (!GetStringValueInArray(V8Context(), property_names, i).ToLocal(&key)) {
return HashMap<String, String>();
}
V8StringResource<> string_key(GetIsolate(), key);
if (!string_key.Prepare(exception_state)) {
return HashMap<String, String>();
}
v8::Local<v8::Value> value;
if (!dictionary_object_->Get(V8Context(), key).ToLocal(&value)) {
return HashMap<String, String>();
}
V8StringResource<> string_value(GetIsolate(), value);
if (!string_value.Prepare(exception_state)) {
return HashMap<String, String>();
}
if (!static_cast<const String&>(string_key).empty())
own_properties.Set(string_key, string_value);
}
return own_properties;
}
Vector<String> Dictionary::GetPropertyNames(
ExceptionState& exception_state) const {
if (dictionary_object_.IsEmpty())
return Vector<String>();
TryRethrowScope rethrow_scope(GetIsolate(), exception_state);
v8::Local<v8::Array> property_names;
if (!dictionary_object_->GetPropertyNames(V8Context())
.ToLocal(&property_names)) {
return Vector<String>();
}
Vector<String> names;
for (uint32_t i = 0; i < property_names->Length(); ++i) {
v8::Local<v8::String> key;
if (!GetStringValueInArray(V8Context(), property_names, i).ToLocal(&key)) {
return Vector<String>();
}
V8StringResource<> string_key(GetIsolate(), key);
if (!string_key.Prepare(exception_state)) {
return Vector<String>();
}
names.push_back(string_key);
}
return names;
}
} // namespace blink
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