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
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
// Copyright 2025 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_ALERT_TAB_ALERT_CONTROLLER_H_
#define CHROME_BROWSER_UI_TABS_ALERT_TAB_ALERT_CONTROLLER_H_
#include <optional>
#include <vector>
#include "base/callback_list.h"
#include "base/containers/flat_set.h"
#include "chrome/browser/ui/tabs/alert/tab_alert.h"
#include "content/public/browser/web_contents_observer.h"
namespace content {
enum class WebContentsCapabilityType;
class WebContents;
} // namespace content
namespace tabs {
// Comparator used to determine which tab alert has a higher priority to be
// shown.
struct CompareAlerts {
bool operator()(TabAlert first, TabAlert second) const;
};
// Observes the corresponding web contents for the tab to keep track of all
// active alerts. Callers can subscribe and be notified when the tab alert that
// should be shown changes.
class TabAlertController : public content::WebContentsObserver {
public:
explicit TabAlertController(content::WebContents* web_contents);
TabAlertController(const TabAlertController&) = delete;
TabAlertController& operator=(const TabAlertController&) = delete;
~TabAlertController() override;
using AlertToShowChangedCallback =
base::RepeatingCallback<void(std::optional<TabAlert>)>;
base::CallbackListSubscription AddAlertToShowChangedCallback(
AlertToShowChangedCallback callback);
std::optional<TabAlert> GetAlertToShow() const;
// Gets all active tab alerts that is sorted from highest priority
// to lowest priority to be shown.
std::vector<TabAlert> GetAllActiveAlerts();
// WebContentsObserver override:
void OnCapabilityTypesChanged(
content::WebContentsCapabilityType capability_type,
bool used) override;
void MediaPictureInPictureChanged(bool is_picture_in_picture) override;
void DidUpdateAudioMutingState(bool muted) override;
void OnAudioStateChanged(bool audible) override;
private:
// Adds `alert` to the set of already active alerts for this tab if it isn't
// currently active. Otherwise, removes `alert` from the set and is considered
// inactive.
void UpdateAlertState(TabAlert alert, bool is_active);
using AlertToShowChangedCallbackList =
base::RepeatingCallbackList<void(std::optional<TabAlert>)>;
AlertToShowChangedCallbackList alert_to_show_changed_callbacks_;
// Maintains a sorted collection of all active tab alerts from highest
// priority to lowest priority to be shown.
base::flat_set<TabAlert, CompareAlerts> active_alerts_;
};
} // namespace tabs
#endif // CHROME_BROWSER_UI_TABS_ALERT_TAB_ALERT_CONTROLLER_H_
|
