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// Copyright (c) 2012 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 CHROME_BROWSER_EXTENSIONS_CHROME_REQUIREMENTS_CHECKER_H_
#define CHROME_BROWSER_EXTENSIONS_CHROME_REQUIREMENTS_CHECKER_H_
#include <vector>
#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "extensions/browser/requirements_checker.h"
class GPUFeatureChecker;
namespace extensions {
class Extension;
// Validates the 'requirements' extension manifest field. This is an
// asynchronous process that involves several threads, but the public interface
// of this class (including constructor and destructor) must only be used on
// the UI thread.
class ChromeRequirementsChecker : public RequirementsChecker {
public:
ChromeRequirementsChecker();
~ChromeRequirementsChecker() override;
private:
// RequirementsChecker:
void Check(const scoped_refptr<const Extension>& extension,
const RequirementsCheckedCallback& callback) override;
// Callbacks for the GPUFeatureChecker.
void SetWebGLAvailability(bool available);
void MaybeRunCallback();
std::vector<std::string> errors_;
// Every requirement that needs to be resolved asynchronously will add to
// this counter. When the counter is depleted, the callback will be run.
int pending_requirement_checks_;
scoped_refptr<GPUFeatureChecker> webgl_checker_;
RequirementsCheckedCallback callback_;
base::WeakPtrFactory<ChromeRequirementsChecker> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(ChromeRequirementsChecker);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_CHROME_REQUIREMENTS_CHECKER_H_
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