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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /layout/base/nsRefreshObservers.cpp
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'layout/base/nsRefreshObservers.cpp')
-rw-r--r--layout/base/nsRefreshObservers.cpp55
1 files changed, 55 insertions, 0 deletions
diff --git a/layout/base/nsRefreshObservers.cpp b/layout/base/nsRefreshObservers.cpp
new file mode 100644
index 0000000000..44f797c0f1
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+++ b/layout/base/nsRefreshObservers.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsRefreshObservers.h"
+#include "nsPresContext.h"
+#include "mozilla/Likely.h"
+
+namespace mozilla {
+
+ManagedPostRefreshObserver::ManagedPostRefreshObserver(nsPresContext* aPc,
+ Action&& aAction)
+ : mPresContext(aPc), mAction(std::move(aAction)) {}
+
+ManagedPostRefreshObserver::ManagedPostRefreshObserver(nsPresContext* aPc)
+ : mPresContext(aPc) {
+ MOZ_ASSERT(mPresContext, "Can't observe without a nsPresContext");
+}
+
+ManagedPostRefreshObserver::~ManagedPostRefreshObserver() = default;
+
+void ManagedPostRefreshObserver::Cancel() {
+ // Caller holds a strong reference, so no need to reference stuff from here.
+ if (mAction) {
+ mAction(true);
+ }
+ mAction = nullptr;
+ mPresContext = nullptr;
+}
+
+void ManagedPostRefreshObserver::DidRefresh() {
+ if (MOZ_UNLIKELY(!mAction)) {
+ return;
+ }
+
+ RefPtr<ManagedPostRefreshObserver> thisObject = this;
+ auto action = std::move(mAction);
+ Unregister unregister = action(false);
+
+ if (unregister == Unregister::Yes) {
+ if (RefPtr<nsPresContext> pc = std::move(mPresContext)) {
+ // We have to null-check mPresContext here because in theory, mAction
+ // could've ended up in `Cancel` being called, which would clear
+ // mPresContext. In that case, we're already unregistered so no need to
+ // do anything.
+ pc->UnregisterManagedPostRefreshObserver(this);
+ }
+ } else {
+ mAction = std::move(action);
+ }
+}
+
+} // namespace mozilla