1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_BROWSER_INSTANT_INSTANT_UNLOAD_HANDLER_H_ 6 #define CHROME_BROWSER_INSTANT_INSTANT_UNLOAD_HANDLER_H_ 7 #pragma once 8 9 #include "base/memory/scoped_vector.h" 10 11 class Browser; 12 class TabContentsWrapper; 13 14 // InstantUnloadHandler makes sure the before unload and unload handler is run 15 // when using instant. When the user commits the instant preview the existing 16 // TabContentsWrapper is passed to |RunUnloadListenersOrDestroy|. If the tab has 17 // no before unload or unload listener the tab is deleted, otherwise the before 18 // unload and unload listener is executed. If the before unload listener shows a 19 // dialog the tab is added back to the tabstrip at its original location next to 20 // the instant page. 21 class InstantUnloadHandler { 22 public: 23 explicit InstantUnloadHandler(Browser* browser); 24 ~InstantUnloadHandler(); 25 26 // See class description for details on what this does. 27 void RunUnloadListenersOrDestroy(TabContentsWrapper* tab_contents, int index); 28 29 private: 30 class TabContentsDelegateImpl; 31 32 // Invoked if the tab is to be shown. This happens if the before unload 33 // listener returns a string. 34 void Activate(TabContentsDelegateImpl* delegate); 35 36 // Destroys the old tab. This is invoked if script tries to close the page. 37 void Destroy(TabContentsDelegateImpl* delegate); 38 39 // TODO(sky): browser really needs to wait to close until there are no more 40 // tabs managed by InstantUnloadHandler. 41 Browser* browser_; 42 43 ScopedVector<TabContentsDelegateImpl> delegates_; 44 45 DISALLOW_COPY_AND_ASSIGN(InstantUnloadHandler); 46 }; 47 48 #endif // CHROME_BROWSER_INSTANT_INSTANT_UNLOAD_HANDLER_H_ 49
