| // Copyright 2014 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. |
| |
| #include "modules/presentation/NavigatorPresentation.h" |
| |
| #include "core/frame/Navigator.h" |
| #include "modules/presentation/Presentation.h" |
| |
| namespace blink { |
| |
| NavigatorPresentation::NavigatorPresentation() |
| { |
| } |
| |
| // static |
| const char* NavigatorPresentation::supplementName() |
| { |
| return "NavigatorPresentation"; |
| } |
| |
| // static |
| NavigatorPresentation& NavigatorPresentation::from(Navigator& navigator) |
| { |
| NavigatorPresentation* supplement = static_cast<NavigatorPresentation*>(Supplement<Navigator>::from(navigator, supplementName())); |
| if (!supplement) { |
| supplement = new NavigatorPresentation(); |
| provideTo(navigator, supplementName(), supplement); |
| } |
| return *supplement; |
| } |
| |
| // static |
| Presentation* NavigatorPresentation::presentation(Navigator& navigator) |
| { |
| NavigatorPresentation& self = NavigatorPresentation::from(navigator); |
| if (!self.m_presentation) { |
| if (!navigator.frame()) |
| return nullptr; |
| self.m_presentation = Presentation::create(navigator.frame()); |
| } |
| return self.m_presentation; |
| } |
| |
| DEFINE_TRACE(NavigatorPresentation) |
| { |
| visitor->trace(m_presentation); |
| Supplement<Navigator>::trace(visitor); |
| } |
| |
| } // namespace blink |