1 /* 2 * Copyright (C) 2012 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef WebPrerenderingSupport_h 32 #define WebPrerenderingSupport_h 33 34 #include "WebCommon.h" 35 36 namespace blink { 37 38 class WebPrerender; 39 40 class WebPrerenderingSupport { 41 public: 42 BLINK_PLATFORM_EXPORT static void initialize(WebPrerenderingSupport*); 43 BLINK_PLATFORM_EXPORT static void shutdown(); 44 BLINK_PLATFORM_EXPORT static WebPrerenderingSupport* current(); 45 46 // A prerender link element is added when it is inserted into a document. 47 virtual void add(const WebPrerender&) = 0; 48 49 // A prerender is canceled when it is removed from a document. 50 virtual void cancel(const WebPrerender&) = 0; 51 52 // A prerender is abandoned when it's navigated away from or suspended in the page cache. This 53 // is a weaker signal than cancel(), since the launcher hasn't indicated that the prerender isn't 54 // wanted, and we may end up using it after, for instance, a short redirect chain. 55 virtual void abandon(const WebPrerender&) = 0; 56 57 protected: 58 WebPrerenderingSupport() { } 59 virtual ~WebPrerenderingSupport() { } 60 61 private: 62 static WebPrerenderingSupport* s_platform; 63 }; 64 65 } // namespace blink 66 67 #endif // WebPrerenderingSupport_h 68
