зеркало из https://github.com/mozilla/gecko-dev.git
56 строки
1.5 KiB
C++
56 строки
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef ZoomConstraintsClient_h_
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#define ZoomConstraintsClient_h_
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#include "mozilla/layers/ScrollableLayerGuid.h"
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#include "mozilla/layers/ZoomConstraints.h"
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#include "mozilla/Maybe.h"
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#include "nsCOMPtr.h"
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#include "nsIDOMEventListener.h"
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#include "nsIObserver.h"
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namespace mozilla {
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class PresShell;
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namespace dom {
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class Document;
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class EventTarget;
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} // namespace dom
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} // namespace mozilla
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class ZoomConstraintsClient final : public nsIDOMEventListener,
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public nsIObserver {
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIDOMEVENTLISTENER
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NS_DECL_NSIOBSERVER
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ZoomConstraintsClient();
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private:
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~ZoomConstraintsClient();
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public:
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void Init(mozilla::PresShell* aPresShell, mozilla::dom::Document* aDocument);
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void Destroy();
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void ScreenSizeChanged();
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bool GetAllowZoom() const { return mZoomConstraints.mAllowZoom; }
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private:
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void RefreshZoomConstraints();
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RefPtr<mozilla::dom::Document> mDocument;
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// raw ref since the presShell owns this
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mozilla::PresShell* MOZ_NON_OWNING_REF mPresShell;
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nsCOMPtr<mozilla::dom::EventTarget> mEventTarget;
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mozilla::Maybe<mozilla::layers::ScrollableLayerGuid> mGuid;
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mozilla::layers::ZoomConstraints mZoomConstraints;
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};
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#endif
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