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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef EXTENSIONS_RENDERER_BINDINGS_API_BINDING_UTIL_H_
#define EXTENSIONS_RENDERER_BINDINGS_API_BINDING_UTIL_H_
#include <memory>
#include <string>
#include "base/auto_reset.h"
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "v8/include/v8.h"
namespace extensions {
namespace binding {
class ContextInvalidationData;
// Returns true if the given `context` is considered valid. Contexts can be
// invalidated if various objects or scripts hold onto references after when
// blink releases the context, but we don't want to handle interactions past
// this point. Additionally, simply checking if gin::PerContextData exists is
// insufficient, because gin::PerContextData is released after the notifications
// for releasing the script context, and author script can run between those
// points. See https://crbug.com/772071.
bool IsContextValid(v8::Local<v8::Context> context);
// Same as above, but throws an exception in the `context` if it is invalid.
bool IsContextValidOrThrowError(v8::Local<v8::Context> context);
// Marks the given `context` as invalid.
void InvalidateContext(v8::Local<v8::Context> context);
// A helper class to watch for context invalidation. If the context is
// invalidated before this object is destroyed, the passed in closure will be
// called.
class ContextInvalidationListener {
public:
ContextInvalidationListener(v8::Local<v8::Context> context,
base::OnceClosure on_invalidated);
ContextInvalidationListener(const ContextInvalidationListener&) = delete;
ContextInvalidationListener& operator=(const ContextInvalidationListener&) =
delete;
~ContextInvalidationListener();
void OnInvalidated();
private:
base::OnceClosure on_invalidated_;
raw_ptr<ContextInvalidationData> context_invalidation_data_ = nullptr;
};
// Returns the string version of the current platform, one of "chromeos",
// "linux", "win", or "mac".
std::string GetPlatformString();
// Returns true if response validation is enabled, and the bindings system
// should check the values returned by the browser against the expected results
// defined in the schemas. By default, this is corresponds to whether DCHECK is
// enabled.
bool IsResponseValidationEnabled();
// Override response validation for testing purposes.
std::unique_ptr<base::AutoReset<bool>> SetResponseValidationEnabledForTesting(
bool is_enabled);
} // namespace binding
} // namespace extensions
#endif // EXTENSIONS_RENDERER_BINDINGS_API_BINDING_UTIL_H_
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