mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-23 12:51:06 +00:00
89d03cb81b
Remove the #include from `nsFrameState.cpp` because it is not used. Differential Revision: https://phabricator.services.mozilla.com/D210232
111 lines
3.8 KiB
C++
111 lines
3.8 KiB
C++
/* -*- 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/. */
|
|
|
|
#ifndef mozilla_dom_VisualViewport_h
|
|
#define mozilla_dom_VisualViewport_h
|
|
|
|
#include "mozilla/DOMEventTargetHelper.h"
|
|
#include "mozilla/WeakPtr.h"
|
|
#include "mozilla/dom/VisualViewportBinding.h"
|
|
#include "Units.h"
|
|
|
|
class nsPresContext;
|
|
|
|
namespace mozilla {
|
|
|
|
class PresShell;
|
|
|
|
namespace dom {
|
|
|
|
/* Visual Viewport API spec:
|
|
* https://wicg.github.io/visual-viewport/#the-visualviewport-interface */
|
|
class VisualViewport final : public mozilla::DOMEventTargetHelper {
|
|
public:
|
|
explicit VisualViewport(nsPIDOMWindowInner* aWindow);
|
|
|
|
double OffsetLeft() const;
|
|
double OffsetTop() const;
|
|
double PageLeft() const;
|
|
double PageTop() const;
|
|
MOZ_CAN_RUN_SCRIPT double Width() const;
|
|
MOZ_CAN_RUN_SCRIPT double Height() const;
|
|
double Scale() const;
|
|
IMPL_EVENT_HANDLER(resize)
|
|
IMPL_EVENT_HANDLER(scroll)
|
|
|
|
virtual JSObject* WrapObject(JSContext* aCx,
|
|
JS::Handle<JSObject*> aGivenProto) override;
|
|
void GetEventTargetParent(EventChainPreVisitor& aVisitor) override;
|
|
|
|
void PostResizeEvent();
|
|
void PostScrollEvent(const nsPoint& aPrevVisualOffset,
|
|
const nsPoint& aPrevLayoutOffset);
|
|
|
|
// These two events are modelled after the ScrollEvent class in
|
|
// ScrollContainerFrame.h.
|
|
class VisualViewportResizeEvent : public Runnable {
|
|
public:
|
|
NS_DECL_NSIRUNNABLE
|
|
VisualViewportResizeEvent(VisualViewport* aViewport,
|
|
nsPresContext* aPresContext);
|
|
bool HasPresContext(nsPresContext* aContext) const;
|
|
void Revoke();
|
|
|
|
private:
|
|
VisualViewport* mViewport;
|
|
WeakPtr<nsPresContext> mPresContext;
|
|
};
|
|
|
|
class VisualViewportScrollEvent : public Runnable {
|
|
public:
|
|
NS_DECL_NSIRUNNABLE
|
|
VisualViewportScrollEvent(VisualViewport* aViewport,
|
|
nsPresContext* aPresContext,
|
|
const nsPoint& aPrevVisualOffset,
|
|
const nsPoint& aPrevLayoutOffset);
|
|
bool HasPresContext(nsPresContext* aContext) const;
|
|
void Revoke();
|
|
nsPoint PrevVisualOffset() const { return mPrevVisualOffset; }
|
|
nsPoint PrevLayoutOffset() const { return mPrevLayoutOffset; }
|
|
|
|
private:
|
|
VisualViewport* mViewport;
|
|
WeakPtr<nsPresContext> mPresContext;
|
|
// The VisualViewport "scroll" event is supposed to be fired only when the
|
|
// *relative* offset between visual and layout viewport changes. The two
|
|
// viewports are updated independently from each other, though, so the only
|
|
// thing we can do is note the fact that one of the inputs into the relative
|
|
// visual viewport offset changed and then check the offset again at the
|
|
// next refresh driver tick, just before the event is going to fire.
|
|
// Hopefully, at this point both visual and layout viewport positions have
|
|
// been updated, so that we're able to tell whether the relative offset did
|
|
// in fact change or not.
|
|
const nsPoint mPrevVisualOffset;
|
|
const nsPoint mPrevLayoutOffset;
|
|
};
|
|
|
|
private:
|
|
virtual ~VisualViewport();
|
|
|
|
MOZ_CAN_RUN_SCRIPT CSSSize VisualViewportSize() const;
|
|
CSSPoint VisualViewportOffset() const;
|
|
CSSPoint LayoutViewportOffset() const;
|
|
Document* GetDocument() const;
|
|
PresShell* GetPresShell() const;
|
|
nsPresContext* GetPresContext() const;
|
|
|
|
MOZ_CAN_RUN_SCRIPT void FireResizeEvent();
|
|
MOZ_CAN_RUN_SCRIPT void FireScrollEvent();
|
|
|
|
RefPtr<VisualViewportResizeEvent> mResizeEvent;
|
|
RefPtr<VisualViewportScrollEvent> mScrollEvent;
|
|
};
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_dom_VisualViewport_h
|