mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-05 16:46:26 +00:00
5f59b02c90
- Extended nsIScrollableFrame and nsGfxScrollFrame to return destination of smooth scrolls which are to be animated on the compositor thread. - Added apz.smooth_scroll_repaint_interval preference. - Implemented AsyncPanZoomController::PanZoomState::SMOOTH_MSD_SCROLL state and AsyncPanZoomController::SmoothScrollAnimation class to animate smooth scroll animations on the compositor thread. - Extended FrameMetrics to report requests for smooth scrolls to be animated on the compositor thread and their corresponding destination positions. - AsyncPanZoomController now checks FrameMetrics for requests to perform smooth scrolling on the compositor thread. It will ensure that they are cancelled as needed by mousewheel, touchpanel, keyboard, and CSSOM-View instant scrolling DOM methods. - The layout/generic/test/test_scroll_behavior.html mochitest has been commented as depending on Bug 1062609 before being enabled for APZ.
1172 lines
45 KiB
C++
1172 lines
45 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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/* rendering object to wrap rendering objects that should be scrollable */
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#ifndef nsGfxScrollFrame_h___
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#define nsGfxScrollFrame_h___
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#include "mozilla/Attributes.h"
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#include "nsContainerFrame.h"
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#include "nsIAnonymousContentCreator.h"
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#include "nsBoxFrame.h"
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#include "nsIScrollableFrame.h"
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#include "nsIScrollbarMediator.h"
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#include "nsIStatefulFrame.h"
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#include "nsThreadUtils.h"
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#include "nsIReflowCallback.h"
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#include "nsBoxLayoutState.h"
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#include "nsQueryFrame.h"
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#include "nsExpirationTracker.h"
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class nsPresContext;
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class nsIPresShell;
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class nsIContent;
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class nsIAtom;
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class nsIScrollFrameInternal;
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class nsPresState;
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class nsIScrollPositionListener;
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struct ScrollReflowState;
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namespace mozilla {
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namespace layers {
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class Layer;
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}
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namespace layout {
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class ScrollbarActivity;
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}
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}
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namespace mozilla {
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class ScrollFrameHelper : public nsIReflowCallback {
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public:
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typedef nsIFrame::Sides Sides;
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typedef mozilla::CSSIntPoint CSSIntPoint;
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typedef mozilla::layout::ScrollbarActivity ScrollbarActivity;
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typedef mozilla::layers::FrameMetrics FrameMetrics;
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typedef mozilla::layers::Layer Layer;
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class AsyncScroll;
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class AsyncSmoothMSDScroll;
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ScrollFrameHelper(nsContainerFrame* aOuter, bool aIsRoot);
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~ScrollFrameHelper();
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mozilla::ScrollbarStyles GetScrollbarStylesFromFrame() const;
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// If a child frame was added or removed on the scrollframe,
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// reload our child frame list.
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// We need this if a scrollbar frame is recreated.
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void ReloadChildFrames();
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nsresult CreateAnonymousContent(
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nsTArray<nsIAnonymousContentCreator::ContentInfo>& aElements);
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void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements, uint32_t aFilter);
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nsresult FireScrollPortEvent();
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void PostOverflowEvent();
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void Destroy();
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void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists);
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void AppendScrollPartsTo(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists,
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bool aCreateLayer,
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bool aPositioned);
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bool GetBorderRadii(const nsSize& aFrameSize, const nsSize& aBorderArea,
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Sides aSkipSides, nscoord aRadii[8]) const;
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// nsIReflowCallback
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virtual bool ReflowFinished() MOZ_OVERRIDE;
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virtual void ReflowCallbackCanceled() MOZ_OVERRIDE;
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/**
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* @note This method might destroy the frame, pres shell and other objects.
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* Called when the 'curpos' attribute on one of the scrollbars changes.
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*/
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void CurPosAttributeChanged(nsIContent* aChild);
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void PostScrollEvent();
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void FireScrollEvent();
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void PostScrolledAreaEvent();
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void FireScrolledAreaEvent();
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class ScrollEvent : public nsRunnable {
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public:
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NS_DECL_NSIRUNNABLE
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explicit ScrollEvent(ScrollFrameHelper *helper) : mHelper(helper) {}
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void Revoke() { mHelper = nullptr; }
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private:
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ScrollFrameHelper *mHelper;
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};
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class AsyncScrollPortEvent : public nsRunnable {
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public:
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NS_DECL_NSIRUNNABLE
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explicit AsyncScrollPortEvent(ScrollFrameHelper *helper) : mHelper(helper) {}
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void Revoke() { mHelper = nullptr; }
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private:
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ScrollFrameHelper *mHelper;
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};
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class ScrolledAreaEvent : public nsRunnable {
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public:
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NS_DECL_NSIRUNNABLE
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explicit ScrolledAreaEvent(ScrollFrameHelper *helper) : mHelper(helper) {}
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void Revoke() { mHelper = nullptr; }
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private:
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ScrollFrameHelper *mHelper;
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};
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/**
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* @note This method might destroy the frame, pres shell and other objects.
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*/
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void FinishReflowForScrollbar(nsIContent* aContent, nscoord aMinXY,
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nscoord aMaxXY, nscoord aCurPosXY,
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nscoord aPageIncrement,
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nscoord aIncrement);
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/**
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* @note This method might destroy the frame, pres shell and other objects.
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*/
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void SetScrollbarEnabled(nsIContent* aContent, nscoord aMaxPos);
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/**
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* @note This method might destroy the frame, pres shell and other objects.
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*/
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void SetCoordAttribute(nsIContent* aContent, nsIAtom* aAtom, nscoord aSize);
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nscoord GetCoordAttribute(nsIFrame* aFrame, nsIAtom* aAtom, nscoord aDefaultValue,
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nscoord* aRangeStart, nscoord* aRangeLength);
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/**
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* @note This method might destroy the frame, pres shell and other objects.
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* Update scrollbar curpos attributes to reflect current scroll position
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*/
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void UpdateScrollbarPosition();
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nsRect GetScrollPortRect() const { return mScrollPort; }
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nsPoint GetScrollPosition() const {
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return mScrollPort.TopLeft() - mScrolledFrame->GetPosition();
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}
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/**
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* For LTR frames, the logical scroll position is the offset of the top left
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* corner of the frame from the top left corner of the scroll port (same as
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* GetScrollPosition).
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* For RTL frames, it is the offset of the top right corner of the frame from
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* the top right corner of the scroll port
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*/
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nsPoint GetLogicalScrollPosition() const {
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nsPoint pt;
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pt.x = IsLTR() ?
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mScrollPort.x - mScrolledFrame->GetPosition().x :
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mScrollPort.XMost() - mScrolledFrame->GetRect().XMost();
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pt.y = mScrollPort.y - mScrolledFrame->GetPosition().y;
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return pt;
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}
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nsRect GetScrollRange() const;
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// Get the scroll range assuming the scrollport has size (aWidth, aHeight).
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nsRect GetScrollRange(nscoord aWidth, nscoord aHeight) const;
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nsSize GetScrollPositionClampingScrollPortSize() const;
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gfxSize GetResolution() const;
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void SetResolution(const gfxSize& aResolution);
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protected:
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nsRect GetScrollRangeForClamping() const;
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public:
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static void AsyncScrollCallback(ScrollFrameHelper* aInstance,
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mozilla::TimeStamp aTime);
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static void AsyncSmoothMSDScrollCallback(ScrollFrameHelper* aInstance,
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mozilla::TimeDuration aDeltaTime);
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/**
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* @note This method might destroy the frame, pres shell and other objects.
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* aRange is the range of allowable scroll positions around the desired
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* aScrollPosition. Null means only aScrollPosition is allowed.
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* This is a closed-ended range --- aRange.XMost()/aRange.YMost() are allowed.
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*/
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void ScrollTo(nsPoint aScrollPosition, nsIScrollableFrame::ScrollMode aMode,
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const nsRect* aRange = nullptr) {
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ScrollToWithOrigin(aScrollPosition, aMode, nsGkAtoms::other, aRange);
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}
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/**
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* @note This method might destroy the frame, pres shell and other objects.
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*/
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void ScrollToCSSPixels(const CSSIntPoint& aScrollPosition,
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nsIScrollableFrame::ScrollMode aMode
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= nsIScrollableFrame::INSTANT);
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/**
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* @note This method might destroy the frame, pres shell and other objects.
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*/
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void ScrollToCSSPixelsApproximate(const mozilla::CSSPoint& aScrollPosition,
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nsIAtom* aOrigin = nullptr);
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CSSIntPoint GetScrollPositionCSSPixels();
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/**
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* @note This method might destroy the frame, pres shell and other objects.
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*/
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void ScrollToImpl(nsPoint aScrollPosition, const nsRect& aRange, nsIAtom* aOrigin = nullptr);
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void ScrollVisual(nsPoint aOldScrolledFramePosition);
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/**
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* @note This method might destroy the frame, pres shell and other objects.
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*/
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void ScrollBy(nsIntPoint aDelta, nsIScrollableFrame::ScrollUnit aUnit,
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nsIScrollableFrame::ScrollMode aMode, nsIntPoint* aOverflow,
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nsIAtom* aOrigin = nullptr, bool aIsMomentum = false);
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/**
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* @note This method might destroy the frame, pres shell and other objects.
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*/
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void ScrollToRestoredPosition();
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nsSize GetLineScrollAmount() const;
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nsSize GetPageScrollAmount() const;
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nsPresState* SaveState() const;
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void RestoreState(nsPresState* aState);
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nsIFrame* GetScrolledFrame() const { return mScrolledFrame; }
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nsIFrame* GetScrollbarBox(bool aVertical) const {
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return aVertical ? mVScrollbarBox : mHScrollbarBox;
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}
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void AddScrollPositionListener(nsIScrollPositionListener* aListener) {
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mListeners.AppendElement(aListener);
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}
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void RemoveScrollPositionListener(nsIScrollPositionListener* aListener) {
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mListeners.RemoveElement(aListener);
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}
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static void SetScrollbarVisibility(nsIFrame* aScrollbar, bool aVisible);
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/**
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* GetScrolledRect is designed to encapsulate deciding which
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* directions of overflow should be reachable by scrolling and which
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* should not. Callers should NOT depend on it having any particular
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* behavior (although nsXULScrollFrame currently does).
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*
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* This should only be called when the scrolled frame has been
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* reflowed with the scroll port size given in mScrollPort.
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*
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* Currently it allows scrolling down and to the right for
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* nsHTMLScrollFrames with LTR directionality and for all
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* nsXULScrollFrames, and allows scrolling down and to the left for
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* nsHTMLScrollFrames with RTL directionality.
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*/
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nsRect GetScrolledRect() const;
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/**
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* GetScrolledRectInternal is designed to encapsulate deciding which
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* directions of overflow should be reachable by scrolling and which
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* should not. Callers should NOT depend on it having any particular
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* behavior (although nsXULScrollFrame currently does).
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*
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* Currently it allows scrolling down and to the right for
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* nsHTMLScrollFrames with LTR directionality and for all
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* nsXULScrollFrames, and allows scrolling down and to the left for
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* nsHTMLScrollFrames with RTL directionality.
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*/
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nsRect GetScrolledRectInternal(const nsRect& aScrolledOverflowArea,
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const nsSize& aScrollPortSize) const;
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uint32_t GetScrollbarVisibility() const {
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return (mHasVerticalScrollbar ? nsIScrollableFrame::VERTICAL : 0) |
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(mHasHorizontalScrollbar ? nsIScrollableFrame::HORIZONTAL : 0);
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}
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nsMargin GetActualScrollbarSizes() const;
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nsMargin GetDesiredScrollbarSizes(nsBoxLayoutState* aState);
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nscoord GetNondisappearingScrollbarWidth(nsBoxLayoutState* aState);
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bool IsLTR() const;
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bool IsScrollbarOnRight() const;
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bool IsScrollingActive() const { return mScrollingActive || mShouldBuildScrollableLayer; }
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bool IsProcessingAsyncScroll() const {
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return mAsyncScroll != nullptr || mAsyncSmoothMSDScroll != nullptr;
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}
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void ResetScrollPositionForLayerPixelAlignment()
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{
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mScrollPosForLayerPixelAlignment = GetScrollPosition();
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}
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bool UpdateOverflow();
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void UpdateSticky();
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bool IsRectNearlyVisible(const nsRect& aRect) const;
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nsRect ExpandRectToNearlyVisible(const nsRect& aRect) const;
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// adjust the scrollbar rectangle aRect to account for any visible resizer.
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// aHasResizer specifies if there is a content resizer, however this method
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// will also check if a widget resizer is present as well.
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void AdjustScrollbarRectForResizer(nsIFrame* aFrame, nsPresContext* aPresContext,
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nsRect& aRect, bool aHasResizer, bool aVertical);
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// returns true if a resizer should be visible
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bool HasResizer() { return mResizerBox && !mCollapsedResizer; }
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void LayoutScrollbars(nsBoxLayoutState& aState,
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const nsRect& aContentArea,
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const nsRect& aOldScrollArea);
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bool IsIgnoringViewportClipping() const;
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bool ShouldClampScrollPosition() const;
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bool IsAlwaysActive() const;
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void MarkActive();
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void MarkInactive();
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nsExpirationState* GetExpirationState() { return &mActivityExpirationState; }
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void ScheduleSyntheticMouseMove();
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static void ScrollActivityCallback(nsITimer *aTimer, void* anInstance);
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void HandleScrollbarStyleSwitching();
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nsIAtom* LastScrollOrigin() const { return mLastScrollOrigin; }
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nsIAtom* LastSmoothScrollOrigin() const { return mLastSmoothScrollOrigin; }
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uint32_t CurrentScrollGeneration() const { return mScrollGeneration; }
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nsPoint LastScrollDestination() const { return mDestination; }
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void ResetScrollInfoIfGeneration(uint32_t aGeneration) {
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if (aGeneration == mScrollGeneration) {
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mLastScrollOrigin = nullptr;
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mLastSmoothScrollOrigin = nullptr;
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}
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}
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bool WantAsyncScroll() const;
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void ComputeFrameMetrics(Layer* aLayer, nsIFrame* aContainerReferenceFrame,
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const ContainerLayerParameters& aParameters,
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nsRect* aClipRect,
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nsTArray<FrameMetrics>* aOutput) const;
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// nsIScrollbarMediator
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void ScrollByPage(nsScrollbarFrame* aScrollbar, int32_t aDirection);
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void ScrollByWhole(nsScrollbarFrame* aScrollbar, int32_t aDirection);
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void ScrollByLine(nsScrollbarFrame* aScrollbar, int32_t aDirection);
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void RepeatButtonScroll(nsScrollbarFrame* aScrollbar);
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void ThumbMoved(nsScrollbarFrame* aScrollbar,
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nscoord aOldPos,
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nscoord aNewPos);
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void ScrollByUnit(nsScrollbarFrame* aScrollbar,
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nsIScrollableFrame::ScrollMode aMode,
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int32_t aDirection,
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nsIScrollableFrame::ScrollUnit aUnit);
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// owning references to the nsIAnonymousContentCreator-built content
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nsCOMPtr<nsIContent> mHScrollbarContent;
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nsCOMPtr<nsIContent> mVScrollbarContent;
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nsCOMPtr<nsIContent> mScrollCornerContent;
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nsCOMPtr<nsIContent> mResizerContent;
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nsRevocableEventPtr<ScrollEvent> mScrollEvent;
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nsRevocableEventPtr<AsyncScrollPortEvent> mAsyncScrollPortEvent;
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nsRevocableEventPtr<ScrolledAreaEvent> mScrolledAreaEvent;
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nsIFrame* mHScrollbarBox;
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nsIFrame* mVScrollbarBox;
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nsIFrame* mScrolledFrame;
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nsIFrame* mScrollCornerBox;
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nsIFrame* mResizerBox;
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nsContainerFrame* mOuter;
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nsRefPtr<AsyncScroll> mAsyncScroll;
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nsRefPtr<AsyncSmoothMSDScroll> mAsyncSmoothMSDScroll;
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nsRefPtr<ScrollbarActivity> mScrollbarActivity;
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nsTArray<nsIScrollPositionListener*> mListeners;
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nsIAtom* mLastScrollOrigin;
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nsIAtom* mLastSmoothScrollOrigin;
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uint32_t mScrollGeneration;
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nsRect mScrollPort;
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// Where we're currently scrolling to, if we're scrolling asynchronously.
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// If we're not in the middle of an asynchronous scroll then this is
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// just the current scroll position. ScrollBy will choose its
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// destination based on this value.
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nsPoint mDestination;
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nsPoint mScrollPosAtLastPaint;
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// A goal position to try to scroll to as content loads. As long as mLastPos
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// matches the current logical scroll position, we try to scroll to mRestorePos
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// after every reflow --- because after each time content is loaded/added to the
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// scrollable element, there will be a reflow.
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nsPoint mRestorePos;
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// The last logical position we scrolled to while trying to restore mRestorePos, or
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// 0,0 when this is a new frame. Set to -1,-1 once we've scrolled for any reason
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// other than trying to restore mRestorePos.
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nsPoint mLastPos;
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// The current resolution derived from the zoom level and device pixel ratio.
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gfxSize mResolution;
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nsExpirationState mActivityExpirationState;
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nsCOMPtr<nsITimer> mScrollActivityTimer;
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nsPoint mScrollPosForLayerPixelAlignment;
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// The scroll position where we last updated image visibility.
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nsPoint mLastUpdateImagesPos;
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FrameMetrics::ViewID mScrollParentID;
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bool mNeverHasVerticalScrollbar:1;
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bool mNeverHasHorizontalScrollbar:1;
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bool mHasVerticalScrollbar:1;
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bool mHasHorizontalScrollbar:1;
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bool mFrameIsUpdatingScrollbar:1;
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bool mDidHistoryRestore:1;
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// Is this the scrollframe for the document's viewport?
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bool mIsRoot:1;
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// True if we should clip all descendants, false if we should only clip
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// descendants for which we are the containing block.
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bool mClipAllDescendants:1;
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// If true, don't try to layout the scrollbars in Reflow(). This can be
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// useful if multiple passes are involved, because we don't want to place the
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// scrollbars at the wrong size.
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bool mSupppressScrollbarUpdate:1;
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// If true, we skipped a scrollbar layout due to mSupppressScrollbarUpdate
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// being set at some point. That means we should lay out scrollbars even if
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// it might not strictly be needed next time mSupppressScrollbarUpdate is
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// false.
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bool mSkippedScrollbarLayout:1;
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bool mHadNonInitialReflow:1;
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// State used only by PostScrollEvents so we know
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// which overflow states have changed.
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bool mHorizontalOverflow:1;
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bool mVerticalOverflow:1;
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bool mPostedReflowCallback:1;
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bool mMayHaveDirtyFixedChildren:1;
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// If true, need to actually update our scrollbar attributes in the
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// reflow callback.
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bool mUpdateScrollbarAttributes:1;
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// If true, we should be prepared to scroll using this scrollframe
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// by placing descendant content into its own layer(s)
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bool mScrollingActive:1;
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// If true, the resizer is collapsed and not displayed
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bool mCollapsedResizer:1;
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// If true, the layer should always be active because we always build a
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// scrollable layer. Used for asynchronous scrolling.
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bool mShouldBuildScrollableLayer:1;
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// True if this frame has been scrolled at least once
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bool mHasBeenScrolled:1;
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// True if the frame's resolution has been set via SetResolution or restored
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// via RestoreState.
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bool mIsResolutionSet:1;
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protected:
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/**
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* @note This method might destroy the frame, pres shell and other objects.
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*/
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void ScrollToWithOrigin(nsPoint aScrollPosition,
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nsIScrollableFrame::ScrollMode aMode,
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nsIAtom *aOrigin, // nullptr indicates "other" origin
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const nsRect* aRange);
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void CompleteAsyncScroll(const nsRect &aRange, nsIAtom* aOrigin = nullptr);
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static void EnsureImageVisPrefsCached();
|
|
static bool sImageVisPrefsCached;
|
|
// The number of scrollports wide/high to expand when looking for images.
|
|
static uint32_t sHorzExpandScrollPort;
|
|
static uint32_t sVertExpandScrollPort;
|
|
// The fraction of the scrollport we allow to scroll by before we schedule
|
|
// an update of image visibility.
|
|
static int32_t sHorzScrollFraction;
|
|
static int32_t sVertScrollFraction;
|
|
};
|
|
|
|
}
|
|
|
|
/**
|
|
* The scroll frame creates and manages the scrolling view
|
|
*
|
|
* It only supports having a single child frame that typically is an area
|
|
* frame, but doesn't have to be. The child frame must have a view, though
|
|
*
|
|
* Scroll frames don't support incremental changes, i.e. you can't replace
|
|
* or remove the scrolled frame
|
|
*/
|
|
class nsHTMLScrollFrame : public nsContainerFrame,
|
|
public nsIScrollableFrame,
|
|
public nsIAnonymousContentCreator,
|
|
public nsIStatefulFrame {
|
|
public:
|
|
typedef mozilla::ScrollFrameHelper ScrollFrameHelper;
|
|
typedef mozilla::CSSIntPoint CSSIntPoint;
|
|
friend nsHTMLScrollFrame* NS_NewHTMLScrollFrame(nsIPresShell* aPresShell,
|
|
nsStyleContext* aContext,
|
|
bool aIsRoot);
|
|
|
|
NS_DECL_QUERYFRAME
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists) MOZ_OVERRIDE {
|
|
mHelper.BuildDisplayList(aBuilder, aDirtyRect, aLists);
|
|
}
|
|
|
|
bool TryLayout(ScrollReflowState* aState,
|
|
nsHTMLReflowMetrics* aKidMetrics,
|
|
bool aAssumeVScroll, bool aAssumeHScroll,
|
|
bool aForce);
|
|
bool ScrolledContentDependsOnHeight(ScrollReflowState* aState);
|
|
void ReflowScrolledFrame(ScrollReflowState* aState,
|
|
bool aAssumeHScroll,
|
|
bool aAssumeVScroll,
|
|
nsHTMLReflowMetrics* aMetrics,
|
|
bool aFirstPass);
|
|
void ReflowContents(ScrollReflowState* aState,
|
|
const nsHTMLReflowMetrics& aDesiredSize);
|
|
void PlaceScrollArea(const ScrollReflowState& aState,
|
|
const nsPoint& aScrollPosition);
|
|
nscoord GetIntrinsicVScrollbarWidth(nsRenderingContext *aRenderingContext);
|
|
|
|
virtual bool GetBorderRadii(const nsSize& aFrameSize, const nsSize& aBorderArea,
|
|
Sides aSkipSides, nscoord aRadii[8]) const MOZ_OVERRIDE {
|
|
return mHelper.GetBorderRadii(aFrameSize, aBorderArea, aSkipSides, aRadii);
|
|
}
|
|
|
|
virtual nscoord GetMinISize(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
|
|
virtual nscoord GetPrefISize(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
|
|
virtual nsresult GetPadding(nsMargin& aPadding) MOZ_OVERRIDE;
|
|
virtual bool IsCollapsed() MOZ_OVERRIDE;
|
|
|
|
virtual void Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus) MOZ_OVERRIDE;
|
|
|
|
virtual bool UpdateOverflow() MOZ_OVERRIDE {
|
|
return mHelper.UpdateOverflow();
|
|
}
|
|
|
|
// Called to set the child frames. We typically have three: the scroll area,
|
|
// the vertical scrollbar, and the horizontal scrollbar.
|
|
virtual void SetInitialChildList(ChildListID aListID,
|
|
nsFrameList& aChildList) MOZ_OVERRIDE;
|
|
virtual void AppendFrames(ChildListID aListID,
|
|
nsFrameList& aFrameList) MOZ_OVERRIDE;
|
|
virtual void InsertFrames(ChildListID aListID,
|
|
nsIFrame* aPrevFrame,
|
|
nsFrameList& aFrameList) MOZ_OVERRIDE;
|
|
virtual void RemoveFrame(ChildListID aListID,
|
|
nsIFrame* aOldFrame) MOZ_OVERRIDE;
|
|
|
|
virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
|
|
|
|
virtual nsIScrollableFrame* GetScrollTargetFrame() MOZ_OVERRIDE {
|
|
return this;
|
|
}
|
|
|
|
virtual nsContainerFrame* GetContentInsertionFrame() MOZ_OVERRIDE {
|
|
return mHelper.GetScrolledFrame()->GetContentInsertionFrame();
|
|
}
|
|
|
|
virtual bool DoesClipChildren() MOZ_OVERRIDE { return true; }
|
|
virtual nsSplittableType GetSplittableType() const MOZ_OVERRIDE;
|
|
|
|
virtual nsPoint GetPositionOfChildIgnoringScrolling(nsIFrame* aChild) MOZ_OVERRIDE
|
|
{ nsPoint pt = aChild->GetPosition();
|
|
if (aChild == mHelper.GetScrolledFrame()) pt += GetScrollPosition();
|
|
return pt;
|
|
}
|
|
|
|
// nsIAnonymousContentCreator
|
|
virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) MOZ_OVERRIDE;
|
|
virtual void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
|
|
uint32_t aFilter) MOZ_OVERRIDE;
|
|
|
|
// nsIScrollableFrame
|
|
virtual nsIFrame* GetScrolledFrame() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrolledFrame();
|
|
}
|
|
virtual mozilla::ScrollbarStyles GetScrollbarStyles() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrollbarStylesFromFrame();
|
|
}
|
|
virtual uint32_t GetScrollbarVisibility() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrollbarVisibility();
|
|
}
|
|
virtual nsMargin GetActualScrollbarSizes() const MOZ_OVERRIDE {
|
|
return mHelper.GetActualScrollbarSizes();
|
|
}
|
|
virtual nsMargin GetDesiredScrollbarSizes(nsBoxLayoutState* aState) MOZ_OVERRIDE {
|
|
return mHelper.GetDesiredScrollbarSizes(aState);
|
|
}
|
|
virtual nsMargin GetDesiredScrollbarSizes(nsPresContext* aPresContext,
|
|
nsRenderingContext* aRC) MOZ_OVERRIDE {
|
|
nsBoxLayoutState bls(aPresContext, aRC, 0);
|
|
return GetDesiredScrollbarSizes(&bls);
|
|
}
|
|
virtual nscoord GetNondisappearingScrollbarWidth(nsPresContext* aPresContext,
|
|
nsRenderingContext* aRC) MOZ_OVERRIDE {
|
|
nsBoxLayoutState bls(aPresContext, aRC, 0);
|
|
return mHelper.GetNondisappearingScrollbarWidth(&bls);
|
|
}
|
|
virtual nsRect GetScrolledRect() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrolledRect();
|
|
}
|
|
virtual nsRect GetScrollPortRect() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrollPortRect();
|
|
}
|
|
virtual nsPoint GetScrollPosition() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrollPosition();
|
|
}
|
|
virtual nsPoint GetLogicalScrollPosition() const MOZ_OVERRIDE {
|
|
return mHelper.GetLogicalScrollPosition();
|
|
}
|
|
virtual nsRect GetScrollRange() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrollRange();
|
|
}
|
|
virtual nsSize GetScrollPositionClampingScrollPortSize() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrollPositionClampingScrollPortSize();
|
|
}
|
|
virtual gfxSize GetResolution() const MOZ_OVERRIDE {
|
|
return mHelper.GetResolution();
|
|
}
|
|
virtual void SetResolution(const gfxSize& aResolution) MOZ_OVERRIDE {
|
|
return mHelper.SetResolution(aResolution);
|
|
}
|
|
virtual nsSize GetLineScrollAmount() const MOZ_OVERRIDE {
|
|
return mHelper.GetLineScrollAmount();
|
|
}
|
|
virtual nsSize GetPageScrollAmount() const MOZ_OVERRIDE {
|
|
return mHelper.GetPageScrollAmount();
|
|
}
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
virtual void ScrollTo(nsPoint aScrollPosition, ScrollMode aMode,
|
|
const nsRect* aRange = nullptr) MOZ_OVERRIDE {
|
|
mHelper.ScrollTo(aScrollPosition, aMode, aRange);
|
|
}
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
virtual void ScrollToCSSPixels(const CSSIntPoint& aScrollPosition,
|
|
nsIScrollableFrame::ScrollMode aMode
|
|
= nsIScrollableFrame::INSTANT) MOZ_OVERRIDE {
|
|
mHelper.ScrollToCSSPixels(aScrollPosition, aMode);
|
|
}
|
|
virtual void ScrollToCSSPixelsApproximate(const mozilla::CSSPoint& aScrollPosition,
|
|
nsIAtom* aOrigin = nullptr) MOZ_OVERRIDE {
|
|
mHelper.ScrollToCSSPixelsApproximate(aScrollPosition, aOrigin);
|
|
}
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
virtual CSSIntPoint GetScrollPositionCSSPixels() MOZ_OVERRIDE {
|
|
return mHelper.GetScrollPositionCSSPixels();
|
|
}
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
virtual void ScrollBy(nsIntPoint aDelta, ScrollUnit aUnit, ScrollMode aMode,
|
|
nsIntPoint* aOverflow, nsIAtom* aOrigin = nullptr,
|
|
bool aIsMomentum = false) MOZ_OVERRIDE {
|
|
mHelper.ScrollBy(aDelta, aUnit, aMode, aOverflow, aOrigin, aIsMomentum);
|
|
}
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
virtual void ScrollToRestoredPosition() MOZ_OVERRIDE {
|
|
mHelper.ScrollToRestoredPosition();
|
|
}
|
|
virtual void AddScrollPositionListener(nsIScrollPositionListener* aListener) MOZ_OVERRIDE {
|
|
mHelper.AddScrollPositionListener(aListener);
|
|
}
|
|
virtual void RemoveScrollPositionListener(nsIScrollPositionListener* aListener) MOZ_OVERRIDE {
|
|
mHelper.RemoveScrollPositionListener(aListener);
|
|
}
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
virtual void CurPosAttributeChanged(nsIContent* aChild) MOZ_OVERRIDE {
|
|
mHelper.CurPosAttributeChanged(aChild);
|
|
}
|
|
NS_IMETHOD PostScrolledAreaEventForCurrentArea() MOZ_OVERRIDE {
|
|
mHelper.PostScrolledAreaEvent();
|
|
return NS_OK;
|
|
}
|
|
virtual bool IsScrollingActive() MOZ_OVERRIDE {
|
|
return mHelper.IsScrollingActive();
|
|
}
|
|
virtual bool IsProcessingAsyncScroll() MOZ_OVERRIDE {
|
|
return mHelper.IsProcessingAsyncScroll();
|
|
}
|
|
virtual void ResetScrollPositionForLayerPixelAlignment() MOZ_OVERRIDE {
|
|
mHelper.ResetScrollPositionForLayerPixelAlignment();
|
|
}
|
|
virtual bool IsResolutionSet() const MOZ_OVERRIDE {
|
|
return mHelper.mIsResolutionSet;
|
|
}
|
|
virtual bool DidHistoryRestore() const MOZ_OVERRIDE {
|
|
return mHelper.mDidHistoryRestore;
|
|
}
|
|
virtual void ClearDidHistoryRestore() MOZ_OVERRIDE {
|
|
mHelper.mDidHistoryRestore = false;
|
|
}
|
|
virtual bool IsRectNearlyVisible(const nsRect& aRect) MOZ_OVERRIDE {
|
|
return mHelper.IsRectNearlyVisible(aRect);
|
|
}
|
|
virtual nsRect ExpandRectToNearlyVisible(const nsRect& aRect) const MOZ_OVERRIDE {
|
|
return mHelper.ExpandRectToNearlyVisible(aRect);
|
|
}
|
|
virtual nsIAtom* LastScrollOrigin() MOZ_OVERRIDE {
|
|
return mHelper.LastScrollOrigin();
|
|
}
|
|
virtual nsIAtom* LastSmoothScrollOrigin() MOZ_OVERRIDE {
|
|
return mHelper.LastSmoothScrollOrigin();
|
|
}
|
|
virtual uint32_t CurrentScrollGeneration() MOZ_OVERRIDE {
|
|
return mHelper.CurrentScrollGeneration();
|
|
}
|
|
virtual nsPoint LastScrollDestination() MOZ_OVERRIDE {
|
|
return mHelper.LastScrollDestination();
|
|
}
|
|
virtual void ResetScrollInfoIfGeneration(uint32_t aGeneration) MOZ_OVERRIDE {
|
|
mHelper.ResetScrollInfoIfGeneration(aGeneration);
|
|
}
|
|
virtual bool WantAsyncScroll() const MOZ_OVERRIDE {
|
|
return mHelper.WantAsyncScroll();
|
|
}
|
|
virtual void ComputeFrameMetrics(Layer* aLayer, nsIFrame* aContainerReferenceFrame,
|
|
const ContainerLayerParameters& aParameters,
|
|
nsRect* aClipRect,
|
|
nsTArray<FrameMetrics>* aOutput) const MOZ_OVERRIDE {
|
|
mHelper.ComputeFrameMetrics(aLayer, aContainerReferenceFrame,
|
|
aParameters, aClipRect, aOutput);
|
|
}
|
|
|
|
// nsIStatefulFrame
|
|
NS_IMETHOD SaveState(nsPresState** aState) MOZ_OVERRIDE {
|
|
NS_ENSURE_ARG_POINTER(aState);
|
|
*aState = mHelper.SaveState();
|
|
return NS_OK;
|
|
}
|
|
NS_IMETHOD RestoreState(nsPresState* aState) MOZ_OVERRIDE {
|
|
NS_ENSURE_ARG_POINTER(aState);
|
|
mHelper.RestoreState(aState);
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* Get the "type" of the frame
|
|
*
|
|
* @see nsGkAtoms::scrollFrame
|
|
*/
|
|
virtual nsIAtom* GetType() const MOZ_OVERRIDE;
|
|
|
|
// nsIScrollbarMediator
|
|
virtual void ScrollByPage(nsScrollbarFrame* aScrollbar, int32_t aDirection) MOZ_OVERRIDE {
|
|
mHelper.ScrollByPage(aScrollbar, aDirection);
|
|
}
|
|
virtual void ScrollByWhole(nsScrollbarFrame* aScrollbar, int32_t aDirection) MOZ_OVERRIDE {
|
|
mHelper.ScrollByWhole(aScrollbar, aDirection);
|
|
}
|
|
virtual void ScrollByLine(nsScrollbarFrame* aScrollbar, int32_t aDirection) MOZ_OVERRIDE {
|
|
mHelper.ScrollByLine(aScrollbar, aDirection);
|
|
}
|
|
virtual void RepeatButtonScroll(nsScrollbarFrame* aScrollbar) MOZ_OVERRIDE {
|
|
mHelper.RepeatButtonScroll(aScrollbar);
|
|
}
|
|
virtual void ThumbMoved(nsScrollbarFrame* aScrollbar,
|
|
nscoord aOldPos,
|
|
nscoord aNewPos) MOZ_OVERRIDE {
|
|
mHelper.ThumbMoved(aScrollbar, aOldPos, aNewPos);
|
|
}
|
|
virtual void VisibilityChanged(bool aVisible) {}
|
|
virtual nsIFrame* GetScrollbarBox(bool aVertical) MOZ_OVERRIDE {
|
|
return mHelper.GetScrollbarBox(aVertical);
|
|
}
|
|
virtual void ScrollbarActivityStarted() const MOZ_OVERRIDE;
|
|
virtual void ScrollbarActivityStopped() const MOZ_OVERRIDE;
|
|
|
|
#ifdef DEBUG_FRAME_DUMP
|
|
virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
|
|
#endif
|
|
|
|
#ifdef ACCESSIBILITY
|
|
virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
|
|
#endif
|
|
|
|
protected:
|
|
nsHTMLScrollFrame(nsIPresShell* aShell, nsStyleContext* aContext, bool aIsRoot);
|
|
void SetSuppressScrollbarUpdate(bool aSuppress) {
|
|
mHelper.mSupppressScrollbarUpdate = aSuppress;
|
|
}
|
|
bool GuessHScrollbarNeeded(const ScrollReflowState& aState);
|
|
bool GuessVScrollbarNeeded(const ScrollReflowState& aState);
|
|
|
|
bool IsScrollbarUpdateSuppressed() const {
|
|
return mHelper.mSupppressScrollbarUpdate;
|
|
}
|
|
|
|
// Return whether we're in an "initial" reflow. Some reflows with
|
|
// NS_FRAME_FIRST_REFLOW set are NOT "initial" as far as we're concerned.
|
|
bool InInitialReflow() const;
|
|
|
|
/**
|
|
* Override this to return false if computed height/min-height/max-height
|
|
* should NOT be propagated to child content.
|
|
* nsListControlFrame uses this.
|
|
*/
|
|
virtual bool ShouldPropagateComputedHeightToScrolledContent() const { return true; }
|
|
|
|
private:
|
|
friend class mozilla::ScrollFrameHelper;
|
|
ScrollFrameHelper mHelper;
|
|
};
|
|
|
|
/**
|
|
* The scroll frame creates and manages the scrolling view
|
|
*
|
|
* It only supports having a single child frame that typically is an area
|
|
* frame, but doesn't have to be. The child frame must have a view, though
|
|
*
|
|
* Scroll frames don't support incremental changes, i.e. you can't replace
|
|
* or remove the scrolled frame
|
|
*/
|
|
class nsXULScrollFrame MOZ_FINAL : public nsBoxFrame,
|
|
public nsIScrollableFrame,
|
|
public nsIAnonymousContentCreator,
|
|
public nsIStatefulFrame {
|
|
public:
|
|
typedef mozilla::ScrollFrameHelper ScrollFrameHelper;
|
|
typedef mozilla::CSSIntPoint CSSIntPoint;
|
|
|
|
NS_DECL_QUERYFRAME
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
friend nsXULScrollFrame* NS_NewXULScrollFrame(nsIPresShell* aPresShell,
|
|
nsStyleContext* aContext,
|
|
bool aIsRoot,
|
|
bool aClipAllDescendants);
|
|
|
|
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists) MOZ_OVERRIDE {
|
|
mHelper.BuildDisplayList(aBuilder, aDirtyRect, aLists);
|
|
}
|
|
|
|
// XXXldb Is this actually used?
|
|
#if 0
|
|
virtual nscoord GetMinISize(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
|
|
#endif
|
|
|
|
virtual bool UpdateOverflow() MOZ_OVERRIDE {
|
|
return mHelper.UpdateOverflow();
|
|
}
|
|
|
|
// Called to set the child frames. We typically have three: the scroll area,
|
|
// the vertical scrollbar, and the horizontal scrollbar.
|
|
virtual void SetInitialChildList(ChildListID aListID,
|
|
nsFrameList& aChildList) MOZ_OVERRIDE;
|
|
virtual void AppendFrames(ChildListID aListID,
|
|
nsFrameList& aFrameList) MOZ_OVERRIDE;
|
|
virtual void InsertFrames(ChildListID aListID,
|
|
nsIFrame* aPrevFrame,
|
|
nsFrameList& aFrameList) MOZ_OVERRIDE;
|
|
virtual void RemoveFrame(ChildListID aListID,
|
|
nsIFrame* aOldFrame) MOZ_OVERRIDE;
|
|
|
|
virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
|
|
|
|
|
|
virtual nsIScrollableFrame* GetScrollTargetFrame() MOZ_OVERRIDE {
|
|
return this;
|
|
}
|
|
|
|
virtual nsContainerFrame* GetContentInsertionFrame() MOZ_OVERRIDE {
|
|
return mHelper.GetScrolledFrame()->GetContentInsertionFrame();
|
|
}
|
|
|
|
virtual bool DoesClipChildren() MOZ_OVERRIDE { return true; }
|
|
virtual nsSplittableType GetSplittableType() const MOZ_OVERRIDE;
|
|
|
|
virtual nsPoint GetPositionOfChildIgnoringScrolling(nsIFrame* aChild) MOZ_OVERRIDE
|
|
{ nsPoint pt = aChild->GetPosition();
|
|
if (aChild == mHelper.GetScrolledFrame())
|
|
pt += mHelper.GetLogicalScrollPosition();
|
|
return pt;
|
|
}
|
|
|
|
// nsIAnonymousContentCreator
|
|
virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) MOZ_OVERRIDE;
|
|
virtual void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
|
|
uint32_t aFilter) MOZ_OVERRIDE;
|
|
|
|
virtual nsSize GetMinSize(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
|
|
virtual nsSize GetPrefSize(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
|
|
virtual nsSize GetMaxSize(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
|
|
virtual nscoord GetBoxAscent(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
|
|
|
|
NS_IMETHOD DoLayout(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
|
|
virtual nsresult GetPadding(nsMargin& aPadding) MOZ_OVERRIDE;
|
|
|
|
virtual bool GetBorderRadii(const nsSize& aFrameSize, const nsSize& aBorderArea,
|
|
Sides aSkipSides, nscoord aRadii[8]) const MOZ_OVERRIDE {
|
|
return mHelper.GetBorderRadii(aFrameSize, aBorderArea, aSkipSides, aRadii);
|
|
}
|
|
|
|
nsresult Layout(nsBoxLayoutState& aState);
|
|
void LayoutScrollArea(nsBoxLayoutState& aState, const nsPoint& aScrollPosition);
|
|
|
|
static bool AddRemoveScrollbar(bool& aHasScrollbar,
|
|
nscoord& aXY,
|
|
nscoord& aSize,
|
|
nscoord aSbSize,
|
|
bool aOnRightOrBottom,
|
|
bool aAdd);
|
|
|
|
bool AddRemoveScrollbar(nsBoxLayoutState& aState,
|
|
bool aOnRightOrBottom,
|
|
bool aHorizontal,
|
|
bool aAdd);
|
|
|
|
bool AddHorizontalScrollbar (nsBoxLayoutState& aState, bool aOnBottom);
|
|
bool AddVerticalScrollbar (nsBoxLayoutState& aState, bool aOnRight);
|
|
void RemoveHorizontalScrollbar(nsBoxLayoutState& aState, bool aOnBottom);
|
|
void RemoveVerticalScrollbar (nsBoxLayoutState& aState, bool aOnRight);
|
|
|
|
static void AdjustReflowStateForPrintPreview(nsBoxLayoutState& aState, bool& aSetBack);
|
|
static void AdjustReflowStateBack(nsBoxLayoutState& aState, bool aSetBack);
|
|
|
|
// nsIScrollableFrame
|
|
virtual nsIFrame* GetScrolledFrame() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrolledFrame();
|
|
}
|
|
virtual mozilla::ScrollbarStyles GetScrollbarStyles() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrollbarStylesFromFrame();
|
|
}
|
|
virtual uint32_t GetScrollbarVisibility() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrollbarVisibility();
|
|
}
|
|
virtual nsMargin GetActualScrollbarSizes() const MOZ_OVERRIDE {
|
|
return mHelper.GetActualScrollbarSizes();
|
|
}
|
|
virtual nsMargin GetDesiredScrollbarSizes(nsBoxLayoutState* aState) MOZ_OVERRIDE {
|
|
return mHelper.GetDesiredScrollbarSizes(aState);
|
|
}
|
|
virtual nsMargin GetDesiredScrollbarSizes(nsPresContext* aPresContext,
|
|
nsRenderingContext* aRC) MOZ_OVERRIDE {
|
|
nsBoxLayoutState bls(aPresContext, aRC, 0);
|
|
return GetDesiredScrollbarSizes(&bls);
|
|
}
|
|
virtual nscoord GetNondisappearingScrollbarWidth(nsPresContext* aPresContext,
|
|
nsRenderingContext* aRC) MOZ_OVERRIDE {
|
|
nsBoxLayoutState bls(aPresContext, aRC, 0);
|
|
return mHelper.GetNondisappearingScrollbarWidth(&bls);
|
|
}
|
|
virtual nsRect GetScrolledRect() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrolledRect();
|
|
}
|
|
virtual nsRect GetScrollPortRect() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrollPortRect();
|
|
}
|
|
virtual nsPoint GetScrollPosition() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrollPosition();
|
|
}
|
|
virtual nsPoint GetLogicalScrollPosition() const MOZ_OVERRIDE {
|
|
return mHelper.GetLogicalScrollPosition();
|
|
}
|
|
virtual nsRect GetScrollRange() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrollRange();
|
|
}
|
|
virtual nsSize GetScrollPositionClampingScrollPortSize() const MOZ_OVERRIDE {
|
|
return mHelper.GetScrollPositionClampingScrollPortSize();
|
|
}
|
|
virtual gfxSize GetResolution() const MOZ_OVERRIDE {
|
|
return mHelper.GetResolution();
|
|
}
|
|
virtual void SetResolution(const gfxSize& aResolution) MOZ_OVERRIDE {
|
|
return mHelper.SetResolution(aResolution);
|
|
}
|
|
virtual nsSize GetLineScrollAmount() const MOZ_OVERRIDE {
|
|
return mHelper.GetLineScrollAmount();
|
|
}
|
|
virtual nsSize GetPageScrollAmount() const MOZ_OVERRIDE {
|
|
return mHelper.GetPageScrollAmount();
|
|
}
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
virtual void ScrollTo(nsPoint aScrollPosition, ScrollMode aMode,
|
|
const nsRect* aRange = nullptr) MOZ_OVERRIDE {
|
|
mHelper.ScrollTo(aScrollPosition, aMode, aRange);
|
|
}
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
virtual void ScrollToCSSPixels(const CSSIntPoint& aScrollPosition,
|
|
nsIScrollableFrame::ScrollMode aMode
|
|
= nsIScrollableFrame::INSTANT) MOZ_OVERRIDE {
|
|
mHelper.ScrollToCSSPixels(aScrollPosition, aMode);
|
|
}
|
|
virtual void ScrollToCSSPixelsApproximate(const mozilla::CSSPoint& aScrollPosition,
|
|
nsIAtom* aOrigin = nullptr) MOZ_OVERRIDE {
|
|
mHelper.ScrollToCSSPixelsApproximate(aScrollPosition, aOrigin);
|
|
}
|
|
virtual CSSIntPoint GetScrollPositionCSSPixels() MOZ_OVERRIDE {
|
|
return mHelper.GetScrollPositionCSSPixels();
|
|
}
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
virtual void ScrollBy(nsIntPoint aDelta, ScrollUnit aUnit, ScrollMode aMode,
|
|
nsIntPoint* aOverflow, nsIAtom* aOrigin = nullptr,
|
|
bool aIsMomentum = false) MOZ_OVERRIDE {
|
|
mHelper.ScrollBy(aDelta, aUnit, aMode, aOverflow, aOrigin, aIsMomentum);
|
|
}
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
virtual void ScrollToRestoredPosition() MOZ_OVERRIDE {
|
|
mHelper.ScrollToRestoredPosition();
|
|
}
|
|
virtual void AddScrollPositionListener(nsIScrollPositionListener* aListener) MOZ_OVERRIDE {
|
|
mHelper.AddScrollPositionListener(aListener);
|
|
}
|
|
virtual void RemoveScrollPositionListener(nsIScrollPositionListener* aListener) MOZ_OVERRIDE {
|
|
mHelper.RemoveScrollPositionListener(aListener);
|
|
}
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
virtual void CurPosAttributeChanged(nsIContent* aChild) MOZ_OVERRIDE {
|
|
mHelper.CurPosAttributeChanged(aChild);
|
|
}
|
|
NS_IMETHOD PostScrolledAreaEventForCurrentArea() MOZ_OVERRIDE {
|
|
mHelper.PostScrolledAreaEvent();
|
|
return NS_OK;
|
|
}
|
|
virtual bool IsScrollingActive() MOZ_OVERRIDE {
|
|
return mHelper.IsScrollingActive();
|
|
}
|
|
virtual bool IsProcessingAsyncScroll() MOZ_OVERRIDE {
|
|
return mHelper.IsProcessingAsyncScroll();
|
|
}
|
|
virtual void ResetScrollPositionForLayerPixelAlignment() MOZ_OVERRIDE {
|
|
mHelper.ResetScrollPositionForLayerPixelAlignment();
|
|
}
|
|
virtual bool IsResolutionSet() const MOZ_OVERRIDE {
|
|
return mHelper.mIsResolutionSet;
|
|
}
|
|
virtual bool DidHistoryRestore() const MOZ_OVERRIDE {
|
|
return mHelper.mDidHistoryRestore;
|
|
}
|
|
virtual void ClearDidHistoryRestore() MOZ_OVERRIDE {
|
|
mHelper.mDidHistoryRestore = false;
|
|
}
|
|
virtual bool IsRectNearlyVisible(const nsRect& aRect) MOZ_OVERRIDE {
|
|
return mHelper.IsRectNearlyVisible(aRect);
|
|
}
|
|
virtual nsRect ExpandRectToNearlyVisible(const nsRect& aRect) const MOZ_OVERRIDE {
|
|
return mHelper.ExpandRectToNearlyVisible(aRect);
|
|
}
|
|
virtual nsIAtom* LastScrollOrigin() MOZ_OVERRIDE {
|
|
return mHelper.LastScrollOrigin();
|
|
}
|
|
virtual nsIAtom* LastSmoothScrollOrigin() MOZ_OVERRIDE {
|
|
return mHelper.LastSmoothScrollOrigin();
|
|
}
|
|
virtual uint32_t CurrentScrollGeneration() MOZ_OVERRIDE {
|
|
return mHelper.CurrentScrollGeneration();
|
|
}
|
|
virtual nsPoint LastScrollDestination() MOZ_OVERRIDE {
|
|
return mHelper.LastScrollDestination();
|
|
}
|
|
virtual void ResetScrollInfoIfGeneration(uint32_t aGeneration) MOZ_OVERRIDE {
|
|
mHelper.ResetScrollInfoIfGeneration(aGeneration);
|
|
}
|
|
virtual bool WantAsyncScroll() const MOZ_OVERRIDE {
|
|
return mHelper.WantAsyncScroll();
|
|
}
|
|
virtual void ComputeFrameMetrics(Layer* aLayer, nsIFrame* aContainerReferenceFrame,
|
|
const ContainerLayerParameters& aParameters,
|
|
nsRect* aClipRect,
|
|
nsTArray<FrameMetrics>* aOutput) const MOZ_OVERRIDE {
|
|
mHelper.ComputeFrameMetrics(aLayer, aContainerReferenceFrame,
|
|
aParameters, aClipRect, aOutput);
|
|
}
|
|
|
|
// nsIStatefulFrame
|
|
NS_IMETHOD SaveState(nsPresState** aState) MOZ_OVERRIDE {
|
|
NS_ENSURE_ARG_POINTER(aState);
|
|
*aState = mHelper.SaveState();
|
|
return NS_OK;
|
|
}
|
|
NS_IMETHOD RestoreState(nsPresState* aState) MOZ_OVERRIDE {
|
|
NS_ENSURE_ARG_POINTER(aState);
|
|
mHelper.RestoreState(aState);
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* Get the "type" of the frame
|
|
*
|
|
* @see nsGkAtoms::scrollFrame
|
|
*/
|
|
virtual nsIAtom* GetType() const MOZ_OVERRIDE;
|
|
|
|
virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
|
|
{
|
|
// Override bogus IsFrameOfType in nsBoxFrame.
|
|
if (aFlags & (nsIFrame::eReplacedContainsBlock | nsIFrame::eReplaced))
|
|
return false;
|
|
return nsBoxFrame::IsFrameOfType(aFlags);
|
|
}
|
|
|
|
virtual void ScrollByPage(nsScrollbarFrame* aScrollbar, int32_t aDirection) MOZ_OVERRIDE {
|
|
mHelper.ScrollByPage(aScrollbar, aDirection);
|
|
}
|
|
virtual void ScrollByWhole(nsScrollbarFrame* aScrollbar, int32_t aDirection) MOZ_OVERRIDE {
|
|
mHelper.ScrollByWhole(aScrollbar, aDirection);
|
|
}
|
|
virtual void ScrollByLine(nsScrollbarFrame* aScrollbar, int32_t aDirection) MOZ_OVERRIDE {
|
|
mHelper.ScrollByLine(aScrollbar, aDirection);
|
|
}
|
|
virtual void RepeatButtonScroll(nsScrollbarFrame* aScrollbar) MOZ_OVERRIDE {
|
|
mHelper.RepeatButtonScroll(aScrollbar);
|
|
}
|
|
virtual void ThumbMoved(nsScrollbarFrame* aScrollbar,
|
|
nscoord aOldPos,
|
|
nscoord aNewPos) MOZ_OVERRIDE {
|
|
mHelper.ThumbMoved(aScrollbar, aOldPos, aNewPos);
|
|
}
|
|
virtual void VisibilityChanged(bool aVisible) {}
|
|
virtual nsIFrame* GetScrollbarBox(bool aVertical) MOZ_OVERRIDE {
|
|
return mHelper.GetScrollbarBox(aVertical);
|
|
}
|
|
|
|
virtual void ScrollbarActivityStarted() const MOZ_OVERRIDE;
|
|
virtual void ScrollbarActivityStopped() const MOZ_OVERRIDE;
|
|
|
|
#ifdef DEBUG_FRAME_DUMP
|
|
virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
|
|
#endif
|
|
|
|
protected:
|
|
nsXULScrollFrame(nsIPresShell* aShell, nsStyleContext* aContext, bool aIsRoot,
|
|
bool aClipAllDescendants);
|
|
|
|
void ClampAndSetBounds(nsBoxLayoutState& aState,
|
|
nsRect& aRect,
|
|
nsPoint aScrollPosition,
|
|
bool aRemoveOverflowAreas = false) {
|
|
/*
|
|
* For RTL frames, restore the original scrolled position of the right
|
|
* edge, then subtract the current width to find the physical position.
|
|
*/
|
|
if (!mHelper.IsLTR()) {
|
|
aRect.x = mHelper.mScrollPort.XMost() - aScrollPosition.x - aRect.width;
|
|
}
|
|
mHelper.mScrolledFrame->SetBounds(aState, aRect, aRemoveOverflowAreas);
|
|
}
|
|
|
|
private:
|
|
friend class mozilla::ScrollFrameHelper;
|
|
ScrollFrameHelper mHelper;
|
|
};
|
|
|
|
#endif /* nsGfxScrollFrame_h___ */
|