xpcom/glue/Observer.h@129ffea94266
xpcom/glue/Observer.h
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 #ifndef mozilla_Observer_h
7 #define mozilla_Observer_h
9 #include "nsTArray.h"
11 namespace mozilla {
13 /**
14 * Observer<T> provides a way for a class to observe something.
15 * When an event has to be broadcasted to all Observer<T>, Notify() method
16 * is called.
17 * T represents the type of the object passed in argument to Notify().
18 *
19 * @see ObserverList.
20 */
21 template <class T>
22 class Observer
23 {
24 public:
25 virtual ~Observer() { }
26 virtual void Notify(const T& aParam) = 0;
27 };
29 /**
30 * ObserverList<T> tracks Observer<T> and can notify them when Broadcast() is
31 * called.
32 * T represents the type of the object passed in argument to Broadcast() and
33 * sent to Observer<T> objects through Notify().
34 *
35 * @see Observer.
36 */
37 template <class T>
38 class ObserverList
39 {
40 public:
41 /**
42 * Note: When calling AddObserver, it's up to the caller to make sure the
43 * object isn't going to be release as long as RemoveObserver hasn't been
44 * called.
45 *
46 * @see RemoveObserver()
47 */
48 void AddObserver(Observer<T>* aObserver) {
49 mObservers.AppendElement(aObserver);
50 }
52 /**
53 * Remove the observer from the observer list.
54 * @return Whether the observer has been found in the list.
55 */
56 bool RemoveObserver(Observer<T>* aObserver) {
57 return mObservers.RemoveElement(aObserver);
58 }
60 uint32_t Length() {
61 return mObservers.Length();
62 }
64 void Broadcast(const T& aParam) {
65 uint32_t size = mObservers.Length();
66 for (uint32_t i=0; i<size; ++i) {
67 mObservers[i]->Notify(aParam);
68 }
69 }
71 protected:
72 nsTArray<Observer<T>*> mObservers;
73 };
75 } // namespace mozilla
77 #endif // mozilla_Observer_h
