blob: f63d06e81e88f66e99160b274529a4074d163493 (
plain)
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
|
// Copyright 2014 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 IOS_WEB_PUBLIC_WEB_STATE_WEB_STATE_OBSERVER_H_
#define IOS_WEB_PUBLIC_WEB_STATE_WEB_STATE_OBSERVER_H_
#include "base/macros.h"
namespace web {
struct LoadCommittedDetails;
class WebState;
class WebStateImpl;
// An observer API implemented by classes which are interested in various page
// load events from WebState.
class WebStateObserver {
public:
// Returns the web state associated with this observer.
WebState* web_state() const { return web_state_; }
// This method is invoked when a new non-pending navigation item is created.
// This corresponds to one NavigationManager item being created
// (in the case of new navigations) or renavigated to (for back/forward
// navigations).
virtual void NavigationItemCommitted(
const LoadCommittedDetails& load_details) {};
// Called when the current page is loaded.
virtual void PageLoaded() {};
// Called on URL hash change events.
virtual void URLHashChanged() {};
// Called on history state change events.
virtual void HistoryStateChanged() {};
// Invoked when the WebState is being destroyed. Gives subclasses a chance
// to cleanup.
virtual void WebStateDestroyed() {}
protected:
// Use this constructor when the object is tied to a single WebState for
// its entire lifetime.
explicit WebStateObserver(WebState* web_state);
// Use this constructor when the object wants to observe a WebState for
// part of its lifetime. It can then call Observe() to start and stop
// observing.
WebStateObserver();
virtual ~WebStateObserver();
// Start observing a different WebState; used with the default constructor.
void Observe(WebState* web_state);
private:
friend class WebStateImpl;
// Stops observing the current web state.
void ResetWebState();
WebState* web_state_;
DISALLOW_COPY_AND_ASSIGN(WebStateObserver);
};
} // namespace web
#endif // IOS_WEB_PUBLIC_WEB_STATE_WEB_STATE_OBSERVER_H_
|
