// Copyright (c) 2006-2008 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 CHROME_BROWSER_TABS_TAB_STRIP_MODEL_ORDER_CONTROLLER_H__ #define CHROME_BROWSER_TABS_TAB_STRIP_MODEL_ORDER_CONTROLLER_H__ #include "chrome/browser/pref_member.h" #include "chrome/browser/tabs/tab_strip_model.h" #include "chrome/common/page_transition_types.h" class TabContents; class TabStripModel; /////////////////////////////////////////////////////////////////////////////// // TabStripModelOrderController // // An object that allows different types of ordering and reselection to be // heuristics plugged into a TabStripModel. // class TabStripModelOrderController : public TabStripModelObserver { public: explicit TabStripModelOrderController(TabStripModel* tabstrip); virtual ~TabStripModelOrderController(); // Determine where to place a newly opened tab by using the supplied // transition and foreground flag to figure out how it was opened. int DetermineInsertionIndex(TabContents* new_contents, PageTransition::Type transition, bool foreground); // Determine where to shift selection after a tab is closed is made phantom. // If |is_remove| is false, the tab is not being removed but rather made // phantom (see description of phantom tabs in TabStripModel). int DetermineNewSelectedIndex(int removed_index, bool is_remove) const; // Overridden from TabStripModelObserver: virtual void TabSelectedAt(TabContents* old_contents, TabContents* new_contents, int index, bool user_gesture); protected: // Returns a valid index to be selected after the tab at |removing_index| is // closed. If |index| is after |removing_index| and |is_remove| is true, // |index| is adjusted to reflect the fact that |removing_index| is going // away. This also skips any phantom tabs. int GetValidIndex(int index, int removing_index, bool is_remove) const; TabStripModel* tabstrip_; }; #endif // CHROME_BROWSER_TABS_TAB_STRIP_MODEL_ORDER_CONTROLLER_H__