Index: components/keyboard_lock/keyboard_lock_host.h |
diff --git a/components/keyboard_lock/keyboard_lock_host.h b/components/keyboard_lock/keyboard_lock_host.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..4026da1006762858c168d2a1bef1ea32c7a8cae7 |
--- /dev/null |
+++ b/components/keyboard_lock/keyboard_lock_host.h |
@@ -0,0 +1,66 @@ |
+// Copyright 2017 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_KEYBOARD_LOCK_KEYBOARD_LOCK_HOST_H_ |
+#define COMPONENTS_KEYBOARD_LOCK_KEYBOARD_LOCK_HOST_H_ |
+ |
+#include <memory> |
+ |
+#include "base/gtest_prod_util.h" |
+#include "base/macros.h" |
+#include "base/synchronization/lock.h" |
+#include "components/keyboard_lock/key_event_interceptor.h" |
+ |
+namespace base { |
+template <typename T> |
+struct DefaultSingletonTraits; |
+} // namespace base |
+ |
+namespace keyboard_lock { |
+ |
+class KeyEventInterceptorInstaller; |
+ |
+FORWARD_DECLARE_TEST(KeyboardLockHostTest, KeyEventInterceptorInstallationTest); |
+ |
+class KeyboardLockHost final { |
+ public: |
+ static KeyboardLockHost* GetInstance(); |
+ |
+ ~KeyboardLockHost(); |
+ |
+ // May return nullptr if not interceptor has been installed. This function |
+ // never returns a destroyed object: only one KeyEventInterceptor installation |
+ // is allowed during the lifetime of the process. |
+ KeyEventInterceptor* interceptor() const; |
dtapuska
2017/04/18 13:43:17
Returning a non-const ptr from a const object is w
Hzj_jie
2017/04/19 00:46:26
Done.
|
+ |
+ std::unique_ptr<KeyEventInterceptor::Retriever> GetInterceptorRetriever(); |
+ |
+ private: |
+ // Allows KeyEventInterceptorInstaller to access SetKeyEventInterceptor(). |
+ friend class KeyEventInterceptorInstaller; |
+ |
+ // Allows Singleton to create a instance of KeyboardLockHost. |
+ friend struct base::DefaultSingletonTraits<KeyboardLockHost>; |
+ |
+ // Allows test cases to create a new instance of KeyboardLockHost. |
+ FRIEND_TEST_ALL_PREFIXES(KeyboardLockHostTest, |
+ KeyEventInterceptorInstallationTest); |
+ |
+ KeyboardLockHost(); |
+ |
+ void SetKeyEventInterceptor(std::unique_ptr<KeyEventInterceptor> interceptor); |
+ |
+ // GUARDED_BY(lock_) |
+ std::unique_ptr<KeyEventInterceptor> interceptor_; |
+ |
+ // This lock only guards |interceptor_|, other function calls should be |
+ // forwarded to UI thread. |
+ mutable base::Lock lock_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(KeyboardLockHost); |
+}; |
+ |
+} // namespace keyboard_lock |
+ |
+#endif // COMPONENTS_KEYBOARD_LOCK_KEYBOARD_LOCK_HOST_H_ |