Index: third_party/WebKit/Source/core/observer/ResizeObserverController.cpp |
diff --git a/third_party/WebKit/Source/core/observer/ResizeObserverController.cpp b/third_party/WebKit/Source/core/observer/ResizeObserverController.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..b7bccedc07f4a0d9dc5a5c6bfd27d24827bacf72 |
--- /dev/null |
+++ b/third_party/WebKit/Source/core/observer/ResizeObserverController.cpp |
@@ -0,0 +1,53 @@ |
+// Copyright 2016 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. |
+ |
+#include "core/observer/ResizeObserverController.h" |
+ |
+#include "core/observer/ResizeObserver.h" |
+ |
+ |
+namespace blink { |
+ |
+ResizeObserverController::ResizeObserverController() |
+{ |
+} |
+ |
+void ResizeObserverController::addObserver(ResizeObserver& observer) |
+{ |
+ m_observers.add(&observer); |
+} |
+ |
+bool ResizeObserverController::gatherObservations() |
+{ |
+ bool hasObservations = false; |
+ for (auto& observer : m_observers) |
+ hasObservations = hasObservations || observer->gatherObservations(); |
szager1
2016/07/11 18:33:47
This will skip calling gatherObservations() if has
atotic1
2016/07/11 23:18:58
Good catch. I've reversed the operands, since |= c
|
+ return hasObservations; |
+} |
+ |
+void ResizeObserverController::deliverObservations() |
+{ |
+ // Copy is needed because m_observers might get modified during deliverObservations. |
+ ObserverSet observers; |
szager1
2016/07/11 18:33:47
The idiomatic way to do this is:
HeapVector<Membe
atotic1
2016/07/11 23:18:58
Done. A question:
m_observers is a collection of W
szager1
2016/07/11 23:33:34
Correct: a GC can never happen during the executio
|
+ for (auto it = m_observers.begin(); it != m_observers.end(); ++it) |
+ observers.add(*it); |
+ |
+ for (auto& observer : observers) { |
+ if (observer) |
+ observer->deliverObservations(); |
+ } |
+} |
+ |
+void ResizeObserverController::clearObservations() |
+{ |
+ for (auto& observer : m_observers) |
+ observer->clearObservations(); |
+} |
+ |
+DEFINE_TRACE(ResizeObserverController) |
+{ |
+ visitor->trace(m_observers); |
+} |
+ |
+} // namespace blink |