Index: third_party/WebKit/Source/core/observer/ResizeObserver.cpp |
diff --git a/third_party/WebKit/Source/core/observer/ResizeObserver.cpp b/third_party/WebKit/Source/core/observer/ResizeObserver.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..e491469b4611a3a69d5d9aa78f33f991832f9414 |
--- /dev/null |
+++ b/third_party/WebKit/Source/core/observer/ResizeObserver.cpp |
@@ -0,0 +1,96 @@ |
+// 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/ResizeObserver.h" |
+ |
+#include "core/observer/ResizeObservation.h" |
+#include "core/observer/ResizeObserverCallback.h" |
+#include "core/observer/ResizeObserverController.h" |
+ |
+namespace blink { |
+ |
+ResizeObserver* ResizeObserver::create(Document& document, ResizeObserverCallback* callback) |
+{ |
+ auto observer = new ResizeObserver(callback); |
+ document.ensureResizeObserverController().addObserver(*observer); |
+ return observer; |
+} |
+ |
+ResizeObserver::ResizeObserver(ResizeObserverCallback* callback) |
+ : m_callback(callback) |
+{ |
+} |
+ |
+bool compareObservationToElement(Member<blink::ResizeObservation> observation, Element* el) |
szager1
2016/05/23 19:49:11
This isn't used.
atotic1
2016/05/25 00:15:53
Done.
|
+{ |
+ return observation->target() == el; |
+} |
szager1
2016/05/23 19:49:11
Add blank line.
atotic1
2016/05/25 00:15:53
Done.
|
+bool operator==(Member<blink::ResizeObservation> observation, Element* el) |
szager1
2016/05/23 19:49:11
meh, this is obfuscating. Just use (observation->
atotic1
2016/05/25 00:15:53
Leftover from when I was using the std::find algor
|
+{ |
+ return observation->target() == el; |
+} |
+ |
+void ResizeObserver::observe(Element* target) |
+{ |
+ if (target && m_observations.find(target) == kNotFound) |
szager1
2016/05/23 19:49:11
This is why, for IntersectionObserver, I did this:
atotic1
2016/05/25 00:15:53
Done.
I was not optimizing this case because we t
|
+ m_observations.append(new ResizeObservation(target, this)); |
+} |
+ |
+void ResizeObserver::unobserve(Element* target) |
+{ |
+ auto pos = m_observations.find(target); |
+ if (pos != kNotFound) |
+ m_observations.remove(pos); |
+} |
+ |
+void ResizeObserver::disconnect() |
+{ |
+ m_observations.clear(); |
+ m_activeObservations.clear(); |
szager1
2016/05/23 19:49:11
Also:
m_callback.clear();
atotic1
2016/05/25 00:15:53
That'd violate the spec, because no elements could
|
+} |
+ |
+void ResizeObserver::gatherObservations() |
+{ |
+ m_activeObservations.clear(); |
szager1
2016/05/23 19:49:11
This should be either ASSERT(m_activeObservations-
atotic1
2016/05/25 00:15:53
??? m_activeObservations->clear() does not compile
szager1
2016/06/02 20:52:40
It should never happen that gatherObservations() i
|
+ |
+ for (auto observation : m_observations) { |
szager1
2016/05/23 19:49:11
I'm not sure if it makes a difference, but maybe i
atotic1
2016/05/25 00:15:53
auto& means you can't have a null.
Done.
|
+ if (observation->hasResized()) |
+ m_activeObservations.append(*observation); |
+ } |
+} |
+ |
+void ResizeObserver::deliverObservations() |
+{ |
+ if (m_activeObservations.size() == 0) |
+ return; |
+ |
+ HeapVector<Member<ResizeObserverEntry>> entries; |
+ |
+ for (size_t i = 0; i < m_activeObservations.size(); i++) { |
szager1
2016/05/23 19:49:11
for (auto& observation : m_activeObservations)
atotic1
2016/05/25 00:15:53
Done.
|
+ auto observation = m_activeObservations.at(i); |
+ auto entry = new ResizeObserverEntry(observation->target()); |
+ entries.append(entry); |
+ observation->setBroadcastSize(entry->clientWidth(), entry->clientHeight()); |
+ } |
+ m_callback->handleEvent(entries, this); |
szager1
2016/05/23 19:49:11
m_activeObservations->clear();
atotic1
2016/05/25 00:15:53
Done.
|
+} |
+ |
+ResizeObserver::ObservationList::iterator ResizeObserver::find(Element* target) |
+{ |
+ for (ObservationList::iterator it = m_observations.begin(); it != m_observations.end(); ++it) { |
+ if ((*it)->target() == target) |
+ return it; |
+ } |
+ |
+ return m_observations.end(); |
+} |
+ |
+DEFINE_TRACE(ResizeObserver) |
+{ |
+ visitor->trace(m_callback); |
+ visitor->trace(m_observations); |
+ visitor->trace(m_activeObservations); |
+} |
+ |
+} // namespace blink |