2cbd968da5
* refactor: use ValueOrDefault() in electron_api_web_contents.cc * refactor: use ValueOrDefault() in electron_api_url_loader.cc * refactor: use ValueOrDefault() in electron_download_manager_delegate.cc * refactor: use ValueOrDefault() in electron_touch_bar.mm * refactor: use ValueOrDefault() in electron_url_loader_factory.cc * refactor: use ValueOrDefault() in electron_browser_context.cc * refactor: use ValueOrDefault() in electron_touch_bar.mm * refactor: use ValueOrDefault() in blink_converter.cc * feat: add ValueOrDefault() to PersistentDictionary * empty commit * refactor: use ValueOrDefault() in blink_converter.cc * refactor: inline the rectangle base::Value::Dict * refactor: remove has_scroll temporary --------- Co-authored-by: Deepak Mohan <hop2deep@gmail.com>
76 lines
2.4 KiB
C++
76 lines
2.4 KiB
C++
// Copyright 2014 Cheng Zhao. All rights reserved.
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// Use of this source code is governed by MIT license that can be found in the
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// LICENSE file.
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#ifndef ELECTRON_SHELL_COMMON_GIN_HELPER_PERSISTENT_DICTIONARY_H_
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#define ELECTRON_SHELL_COMMON_GIN_HELPER_PERSISTENT_DICTIONARY_H_
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#include "base/memory/raw_ptr.h"
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#include "gin/converter.h"
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#include "v8/include/v8-context.h"
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#include "v8/include/v8-isolate.h"
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#include "v8/include/v8-local-handle.h"
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#include "v8/include/v8-object.h"
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namespace gin_helper {
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// Like Dictionary, but stores object in persistent handle so you can keep it
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// safely on heap.
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//
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// TODO(zcbenz): The only user of this class is ElectronTouchBar, we should
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// migrate away from this class.
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class PersistentDictionary {
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public:
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PersistentDictionary();
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PersistentDictionary(v8::Isolate* isolate, v8::Local<v8::Object> object);
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PersistentDictionary(const PersistentDictionary& other);
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~PersistentDictionary();
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PersistentDictionary& operator=(const PersistentDictionary& other);
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v8::Local<v8::Object> GetHandle() const;
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template <typename K, typename V>
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bool Get(const K& key, V* out) const {
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const auto handle = GetHandle();
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v8::Local<v8::Context> context = isolate_->GetCurrentContext();
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v8::Local<v8::Value> v8_key = gin::ConvertToV8(isolate_, key);
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v8::Local<v8::Value> value;
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return handle->Has(context, v8_key).FromMaybe(false) &&
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handle->Get(context, v8_key).ToLocal(&value) &&
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gin::ConvertFromV8(isolate_, value, out);
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}
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// Convenience function for using a default value if the
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// specified key isn't present in the dictionary.
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template <typename T>
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T ValueOrDefault(const std::string_view key, T default_value) const {
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if (auto value = T{}; Get(key, &value))
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return value;
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return default_value;
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}
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private:
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raw_ptr<v8::Isolate> isolate_ = nullptr;
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v8::Global<v8::Object> handle_;
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};
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} // namespace gin_helper
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namespace gin {
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template <>
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struct Converter<gin_helper::PersistentDictionary> {
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static bool FromV8(v8::Isolate* isolate,
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v8::Local<v8::Value> val,
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gin_helper::PersistentDictionary* out) {
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if (!val->IsObject())
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return false;
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*out = gin_helper::PersistentDictionary(isolate, val.As<v8::Object>());
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return true;
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}
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};
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} // namespace gin
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#endif // ELECTRON_SHELL_COMMON_GIN_HELPER_PERSISTENT_DICTIONARY_H_
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