chrome/browser/ui/views/tabs/tab_strip_controller.h


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// Copyright (c) 2012 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_UI_VIEWS_TABS_TAB_STRIP_CONTROLLER_H_
#define CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_CONTROLLER_H_
#pragma once

class BaseTab;
class GURL;
class TabStrip;
class TabStripSelectionModel;

namespace gfx {
class Point;
}

// Model/Controller for the TabStrip.
// NOTE: All indices used by this class are in model coordinates.
class TabStripController {
 public:
  virtual ~TabStripController() {}

  // Returns the selection model of the tabstrip.
  virtual const TabStripSelectionModel& GetSelectionModel() = 0;

  // Returns the number of tabs in the model.
  virtual int GetCount() const = 0;

  // Returns true if |index| is a valid model index.
  virtual bool IsValidIndex(int index) const = 0;

  // Returns true if the tab at |index| is the active tab. The active tab is the
  // one whose content is shown.
  virtual bool IsActiveTab(int index) const = 0;

  // Returns the index of the active tab.
  virtual int GetActiveIndex() const = 0;

  // Returns true if the selected index is selected.
  virtual bool IsTabSelected(int index) const = 0;

  // Returns true if the selected index is pinned.
  virtual bool IsTabPinned(int index) const = 0;

  // Returns true if the selected index is closeable.
  virtual bool IsTabCloseable(int index) const = 0;

  // Returns true if the selected index is the new tab page.
  virtual bool IsNewTabPage(int index) const = 0;

  // Select the tab at the specified index in the model.
  virtual void SelectTab(int index) = 0;

  // Extends the selection from the anchor to the specified index in the model.
  virtual void ExtendSelectionTo(int index) = 0;

  // Toggles the selection of the specified index in the model.
  virtual void ToggleSelected(int index) = 0;

  // Adds the selection the anchor to |index|.
  virtual void AddSelectionFromAnchorTo(int index) = 0;

  // Closes the tab at the specified index in the model.
  virtual void CloseTab(int index) = 0;

  // Shows a context menu for the tab at the specified point in screen coords.
  virtual void ShowContextMenuForTab(BaseTab* tab, const gfx::Point& p) = 0;

  // Updates the loading animations of all the tabs.
  virtual void UpdateLoadingAnimations() = 0;

  // Returns true if the associated TabStrip's delegate supports tab moving or
  // detaching. Used by the Frame to determine if dragging on the Tab
  // itself should move the window in cases where there's only one
  // non drag-able Tab.
  virtual int HasAvailableDragActions() const = 0;

  // Notifies controller of a drop index update.
  virtual void OnDropIndexUpdate(int index, bool drop_before) = 0;

  // Performs a drop at the specified location.
  virtual void PerformDrop(bool drop_before, int index, const GURL& url) = 0;

  // Return true if this tab strip is compatible with the provided tab strip.
  // Compatible tab strips can transfer tabs during drag and drop.
  virtual bool IsCompatibleWith(TabStrip* other) const = 0;

  // Creates the new tab.
  virtual void CreateNewTab() = 0;

  // Informs that an active tab is selected when already active (ie - clicked
  // when already active/foreground).
  virtual void ClickActiveTab(int index) = 0;

  // Returns true if the tab strip is in an incognito window.
  virtual bool IsIncognito() = 0;
};

#endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_CONTROLLER_H_