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// Copyright 2013 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 COMPONENTS_TEST_RUNNER_WEB_TASK_H_
#define COMPONENTS_TEST_RUNNER_WEB_TASK_H_
#include <vector>
#include "base/macros.h"
namespace test_runner {
class WebTaskList;
// WebTask represents a task which can run by WebTestDelegate::postTask() or
// WebTestDelegate::postDelayedTask().
class WebTask {
public:
explicit WebTask(WebTaskList*);
virtual ~WebTask();
// The main code of this task.
// An implementation of run() should return immediately if cancel() was
// called.
virtual void run() = 0;
virtual void cancel() = 0;
protected:
WebTaskList* task_list_;
};
class WebTaskList {
public:
WebTaskList();
~WebTaskList();
void RegisterTask(WebTask*);
void UnregisterTask(WebTask*);
void RevokeAll();
private:
std::vector<WebTask*> tasks_;
DISALLOW_COPY_AND_ASSIGN(WebTaskList);
};
// A task containing an object pointer of class T. Derived classes should
// override RunIfValid() which in turn can safely invoke methods on the
// object_. The Class T must have "WebTaskList* mutable_task_list()".
template <class T>
class WebMethodTask : public WebTask {
public:
explicit WebMethodTask(T* object)
: WebTask(object->mutable_task_list()), object_(object) {}
virtual ~WebMethodTask() {}
void run() override {
if (object_)
RunIfValid();
}
void cancel() override {
object_ = 0;
task_list_->UnregisterTask(this);
task_list_ = 0;
}
virtual void RunIfValid() = 0;
protected:
T* object_;
};
} // namespace test_runner
#endif // COMPONENTS_TEST_RUNNER_WEB_TASK_H_
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