1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_TABS_HOVER_TAB_SELECTOR_H_
#define CHROME_BROWSER_UI_TABS_HOVER_TAB_SELECTOR_H_
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
class TabStripModel;
// Helper class to perform "spring-loaded" tab transitions. Manages
// the lifecycle of delayed tab transition tasks.
class HoverTabSelector {
public:
explicit HoverTabSelector(TabStripModel* tab_strip_model);
HoverTabSelector(const HoverTabSelector&) = delete;
HoverTabSelector& operator=(const HoverTabSelector&) = delete;
~HoverTabSelector();
// Begin a delayed tab transition to the tab at |index|. Only starts
// the transition if the specified tab is not active and there isn't
// already a transition to it scheduled. Cancels the pending transition
// to any other tab, if there is one.
void StartTabTransition(int index);
// Cancel a pending tab transition. No-op if there is no pending transition.
void CancelTabTransition();
private:
// Performs the tab transition.
void PerformTabTransition();
// Model of the tab strip on which this class operates.
raw_ptr<TabStripModel> tab_strip_model_;
// The model index of the tab to transition to.
int tab_transition_tab_index_;
// Factory for creating tab transition tasks.
base::WeakPtrFactory<HoverTabSelector> weak_factory_{this};
};
#endif // CHROME_BROWSER_UI_TABS_HOVER_TAB_SELECTOR_H_
|
