| /* |
| * Copyright (C) 2011 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef WebScopedUserGesture_h |
| #define WebScopedUserGesture_h |
| |
| #include "../platform/WebPrivateOwnPtr.h" |
| |
| namespace WebCore { |
| class UserGestureIndicator; |
| } |
| |
| namespace blink { |
| |
| class WebUserGestureToken; |
| |
| // An instance of this class, while kept alive, will indicate that we are in |
| // the context of a known user gesture. To use, create one, perform whatever |
| // actions were done under color of a known user gesture, and then delete it. |
| // Usually this will be done on the stack. |
| // |
| // SECURITY WARNING: Do not create several instances of this class for the same |
| // user gesture. Doing so might enable malicious code to work around certain |
| // restrictions such as opening multiple windows. |
| // Instead, obtain the current WebUserGestureToken from the |
| // WebUserGestureIndicator, and use this token to create a |
| // WebScopedUserGesture. If the token was alrady consumed, the new |
| // WebScopedUserGesture will not indicate that we are in the context of a user |
| // gesture. |
| class WebScopedUserGesture { |
| public: |
| explicit WebScopedUserGesture(const WebUserGestureToken& token) { initializeWithToken(token); } |
| WebScopedUserGesture() { initialize(); } |
| ~WebScopedUserGesture() { reset(); } |
| |
| private: |
| BLINK_EXPORT void initialize(); |
| BLINK_EXPORT void initializeWithToken(const WebUserGestureToken&); |
| BLINK_EXPORT void reset(); |
| |
| WebPrivateOwnPtr<WebCore::UserGestureIndicator> m_indicator; |
| }; |
| |
| } // namespace blink |
| |
| #endif // WebScopedUserGesture_h |