mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-30 05:35:31 +00:00
218 lines
7.3 KiB
C++
218 lines
7.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* 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 nsListBoxBodyFrame_h
|
|
#define nsListBoxBodyFrame_h
|
|
|
|
#include "mozilla/Attributes.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsBoxFrame.h"
|
|
#include "nsIScrollbarMediator.h"
|
|
#include "nsIReflowCallback.h"
|
|
#include "nsBoxLayoutState.h"
|
|
#include "nsThreadUtils.h"
|
|
#include "nsPIBoxObject.h"
|
|
|
|
class nsPresContext;
|
|
class nsListScrollSmoother;
|
|
nsIFrame* NS_NewListBoxBodyFrame(nsIPresShell* aPresShell,
|
|
nsStyleContext* aContext);
|
|
|
|
class nsListBoxBodyFrame final : public nsBoxFrame,
|
|
public nsIScrollbarMediator,
|
|
public nsIReflowCallback
|
|
{
|
|
nsListBoxBodyFrame(nsStyleContext* aContext,
|
|
nsBoxLayout* aLayoutManager);
|
|
virtual ~nsListBoxBodyFrame();
|
|
|
|
public:
|
|
NS_DECL_QUERYFRAME_TARGET(nsListBoxBodyFrame)
|
|
NS_DECL_QUERYFRAME
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
// non-virtual ListBoxObject
|
|
int32_t GetNumberOfVisibleRows();
|
|
int32_t GetIndexOfFirstVisibleRow();
|
|
nsresult EnsureIndexIsVisible(int32_t aRowIndex);
|
|
nsresult ScrollToIndex(int32_t aRowIndex);
|
|
nsresult ScrollByLines(int32_t aNumLines);
|
|
nsresult GetItemAtIndex(int32_t aIndex, nsIDOMElement **aResult);
|
|
nsresult GetIndexOfItem(nsIDOMElement *aItem, int32_t *aResult);
|
|
|
|
friend nsIFrame* NS_NewListBoxBodyFrame(nsIPresShell* aPresShell,
|
|
nsStyleContext* aContext);
|
|
|
|
// nsIFrame
|
|
virtual void Init(nsIContent* aContent,
|
|
nsContainerFrame* aParent,
|
|
nsIFrame* aPrevInFlow) override;
|
|
virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
|
|
|
|
virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsIAtom* aAttribute, int32_t aModType) override;
|
|
|
|
// nsIScrollbarMediator
|
|
virtual void ScrollByPage(nsScrollbarFrame* aScrollbar, int32_t aDirection,
|
|
nsIScrollbarMediator::ScrollSnapMode snapMode
|
|
= nsIScrollbarMediator::DISABLE_SNAP) override;
|
|
virtual void ScrollByWhole(nsScrollbarFrame* aScrollbar, int32_t aDirection,
|
|
nsIScrollbarMediator::ScrollSnapMode snapMode
|
|
= nsIScrollbarMediator::DISABLE_SNAP) override;
|
|
virtual void ScrollByLine(nsScrollbarFrame* aScrollbar, int32_t aDirection,
|
|
nsIScrollbarMediator::ScrollSnapMode snapMode
|
|
= nsIScrollbarMediator::DISABLE_SNAP) override;
|
|
virtual void RepeatButtonScroll(nsScrollbarFrame* aScrollbar) override;
|
|
virtual void ThumbMoved(nsScrollbarFrame* aScrollbar,
|
|
int32_t aOldPos,
|
|
int32_t aNewPos) override;
|
|
virtual void ScrollbarReleased(nsScrollbarFrame* aScrollbar) override {}
|
|
virtual void VisibilityChanged(bool aVisible) override;
|
|
virtual nsIFrame* GetScrollbarBox(bool aVertical) override;
|
|
virtual void ScrollbarActivityStarted() const override {}
|
|
virtual void ScrollbarActivityStopped() const override {}
|
|
virtual bool IsScrollbarOnRight() const override {
|
|
return (StyleVisibility()->mDirection == NS_STYLE_DIRECTION_LTR);
|
|
}
|
|
virtual bool ShouldSuppressScrollbarRepaints() const override {
|
|
return false;
|
|
}
|
|
|
|
|
|
// nsIReflowCallback
|
|
virtual bool ReflowFinished() override;
|
|
virtual void ReflowCallbackCanceled() override;
|
|
|
|
NS_IMETHOD DoXULLayout(nsBoxLayoutState& aBoxLayoutState) override;
|
|
virtual void MarkIntrinsicISizesDirty() override;
|
|
|
|
virtual nsSize GetXULMinSizeForScrollArea(nsBoxLayoutState& aBoxLayoutState) override;
|
|
virtual nsSize GetXULPrefSize(nsBoxLayoutState& aBoxLayoutState) override;
|
|
|
|
// size calculation
|
|
int32_t GetRowCount();
|
|
int32_t GetRowHeightAppUnits() { return mRowHeight; }
|
|
int32_t GetFixedRowSize();
|
|
void SetRowHeight(nscoord aRowHeight);
|
|
nscoord GetYPosition();
|
|
nscoord GetAvailableHeight();
|
|
nscoord ComputeIntrinsicISize(nsBoxLayoutState& aBoxLayoutState);
|
|
|
|
// scrolling
|
|
nsresult InternalPositionChangedCallback();
|
|
nsresult InternalPositionChanged(bool aUp, int32_t aDelta);
|
|
// Process pending position changed events, then do the position change.
|
|
// This can wipe out the frametree.
|
|
nsresult DoInternalPositionChangedSync(bool aUp, int32_t aDelta);
|
|
// Actually do the internal position change. This can wipe out the frametree
|
|
nsresult DoInternalPositionChanged(bool aUp, int32_t aDelta);
|
|
nsListScrollSmoother* GetSmoother();
|
|
void VerticalScroll(int32_t aDelta);
|
|
// Update the scroll index given a position, in CSS pixels
|
|
void UpdateIndex(int32_t aNewPos);
|
|
|
|
// frames
|
|
nsIFrame* GetFirstFrame();
|
|
nsIFrame* GetLastFrame();
|
|
|
|
// lazy row creation and destruction
|
|
void CreateRows();
|
|
void DestroyRows(int32_t& aRowsToLose);
|
|
void ReverseDestroyRows(int32_t& aRowsToLose);
|
|
nsIFrame* GetFirstItemBox(int32_t aOffset, bool* aCreated);
|
|
nsIFrame* GetNextItemBox(nsIFrame* aBox, int32_t aOffset, bool* aCreated);
|
|
bool ContinueReflow(nscoord height);
|
|
NS_IMETHOD ListBoxAppendFrames(nsFrameList& aFrameList);
|
|
NS_IMETHOD ListBoxInsertFrames(nsIFrame* aPrevFrame, nsFrameList& aFrameList);
|
|
void OnContentInserted(nsIContent* aContent);
|
|
void OnContentRemoved(nsPresContext* aPresContext, nsIContent* aContainer,
|
|
nsIFrame* aChildFrame, nsIContent* aOldNextSibling);
|
|
|
|
void GetListItemContentAt(int32_t aIndex, nsIContent** aContent);
|
|
void GetListItemNextSibling(nsIContent* aListItem, nsIContent** aContent, int32_t& aSiblingIndex);
|
|
|
|
void PostReflowCallback();
|
|
|
|
bool SetBoxObject(nsPIBoxObject* aBoxObject)
|
|
{
|
|
NS_ENSURE_TRUE(!mBoxObject, false);
|
|
mBoxObject = aBoxObject;
|
|
return true;
|
|
}
|
|
|
|
virtual bool SupportsOrdinalsInChildren() override;
|
|
|
|
virtual bool ComputesOwnOverflowArea() override { return true; }
|
|
|
|
protected:
|
|
class nsPositionChangedEvent;
|
|
friend class nsPositionChangedEvent;
|
|
|
|
class nsPositionChangedEvent : public mozilla::Runnable
|
|
{
|
|
public:
|
|
nsPositionChangedEvent(nsListBoxBodyFrame* aFrame,
|
|
bool aUp, int32_t aDelta) :
|
|
mFrame(aFrame), mUp(aUp), mDelta(aDelta)
|
|
{}
|
|
|
|
NS_IMETHOD Run() override
|
|
{
|
|
if (!mFrame) {
|
|
return NS_OK;
|
|
}
|
|
|
|
mFrame->mPendingPositionChangeEvents.RemoveElement(this);
|
|
|
|
return mFrame->DoInternalPositionChanged(mUp, mDelta);
|
|
}
|
|
|
|
void Revoke() {
|
|
mFrame = nullptr;
|
|
}
|
|
|
|
nsListBoxBodyFrame* mFrame;
|
|
bool mUp;
|
|
int32_t mDelta;
|
|
};
|
|
|
|
void ComputeTotalRowCount();
|
|
int32_t ToRowIndex(nscoord aPos) const;
|
|
void RemoveChildFrame(nsBoxLayoutState &aState, nsIFrame *aChild);
|
|
|
|
nsTArray< RefPtr<nsPositionChangedEvent> > mPendingPositionChangeEvents;
|
|
nsCOMPtr<nsPIBoxObject> mBoxObject;
|
|
|
|
// frame markers
|
|
nsWeakFrame mTopFrame;
|
|
nsIFrame* mBottomFrame;
|
|
nsIFrame* mLinkupFrame;
|
|
|
|
nsListScrollSmoother* mScrollSmoother;
|
|
|
|
int32_t mRowsToPrepend;
|
|
|
|
// row height
|
|
int32_t mRowCount;
|
|
nscoord mRowHeight;
|
|
nscoord mAvailableHeight;
|
|
nscoord mStringWidth;
|
|
|
|
// scrolling
|
|
int32_t mCurrentIndex; // Row-based
|
|
int32_t mOldIndex;
|
|
int32_t mYPosition;
|
|
int32_t mTimePerRow;
|
|
|
|
// row height
|
|
bool mRowHeightWasSet;
|
|
// scrolling
|
|
bool mScrolling;
|
|
bool mAdjustScroll;
|
|
|
|
bool mReflowCallbackPosted;
|
|
};
|
|
|
|
#endif // nsListBoxBodyFrame_h
|