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/* -*- 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 nsSliderFrame_h__
#define nsSliderFrame_h__
#include "mozilla/Attributes.h"
#include "nsRepeatService.h"
#include "nsBoxFrame.h"
#include "nsIAtom.h"
#include "nsCOMPtr.h"
#include "nsITimer.h"
#include "nsIDOMEventListener.h"
class nsITimer;
class nsSliderFrame;
nsIFrame* NS_NewSliderFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
class nsSliderMediator final : public nsIDOMEventListener
{
public:
NS_DECL_ISUPPORTS
nsSliderFrame* mSlider;
explicit nsSliderMediator(nsSliderFrame* aSlider) { mSlider = aSlider; }
virtual void SetSlider(nsSliderFrame* aSlider) { mSlider = aSlider; }
NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent) override;
protected:
virtual ~nsSliderMediator() {}
};
class nsSliderFrame : public nsBoxFrame
{
public:
NS_DECL_FRAMEARENA_HELPERS
NS_DECL_QUERYFRAME_TARGET(nsSliderFrame)
NS_DECL_QUERYFRAME
friend class nsSliderMediator;
explicit nsSliderFrame(nsStyleContext* aContext);
virtual ~nsSliderFrame();
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(NS_LITERAL_STRING("SliderFrame"), aResult);
}
#endif
virtual nsSize GetXULPrefSize(nsBoxLayoutState& aBoxLayoutState) override;
virtual nsSize GetXULMinSize(nsBoxLayoutState& aBoxLayoutState) override;
virtual nsSize GetXULMaxSize(nsBoxLayoutState& aBoxLayoutState) override;
NS_IMETHOD DoXULLayout(nsBoxLayoutState& aBoxLayoutState) override;
// nsIFrame overrides
virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
virtual void BuildDisplayListForChildren(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) override;
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) override;
virtual nsresult AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) override;
virtual void Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* asPrevInFlow) override;
virtual nsresult HandleEvent(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) override;
virtual nsIAtom* GetType() const override;
// nsContainerFrame overrides
virtual void SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList) override;
virtual void AppendFrames(ChildListID aListID,
nsFrameList& aFrameList) override;
virtual void InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList) override;
virtual void RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame) override;
nsresult StartDrag(nsIDOMEvent* aEvent);
nsresult StopDrag();
bool StartAPZDrag();
static int32_t GetCurrentPosition(nsIContent* content);
static int32_t GetMinPosition(nsIContent* content);
static int32_t GetMaxPosition(nsIContent* content);
static int32_t GetIncrement(nsIContent* content);
static int32_t GetPageIncrement(nsIContent* content);
static int32_t GetIntegerAttribute(nsIContent* content, nsIAtom* atom, int32_t defaultValue);
void EnsureOrient();
NS_IMETHOD HandlePress(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) override;
NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus,
bool aControlHeld) override
{
return NS_OK;
}
NS_IMETHOD HandleDrag(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) override
{
return NS_OK;
}
NS_IMETHOD HandleRelease(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) override;
// Return the ratio the scrollbar thumb should move in proportion to the
// scrolled frame.
float GetThumbRatio() const;
private:
bool GetScrollToClick();
nsIFrame* GetScrollbar();
bool ShouldScrollForEvent(mozilla::WidgetGUIEvent* aEvent);
bool ShouldScrollToClickForEvent(mozilla::WidgetGUIEvent* aEvent);
bool IsEventOverThumb(mozilla::WidgetGUIEvent* aEvent);
void PageUpDown(nscoord change);
void SetCurrentThumbPosition(nsIContent* aScrollbar, nscoord aNewPos, bool aIsSmooth,
bool aMaySnap);
void SetCurrentPosition(nsIContent* aScrollbar, int32_t aNewPos, bool aIsSmooth);
void SetCurrentPositionInternal(nsIContent* aScrollbar, int32_t pos,
bool aIsSmooth);
void CurrentPositionChanged();
void DragThumb(bool aGrabMouseEvents);
void AddListener();
void RemoveListener();
bool isDraggingThumb();
void StartRepeat() {
nsRepeatService::GetInstance()->Start(Notify, this);
}
void StopRepeat() {
nsRepeatService::GetInstance()->Stop(Notify, this);
}
void Notify();
static void Notify(void* aData) {
(static_cast<nsSliderFrame*>(aData))->Notify();
}
void PageScroll(nscoord aChange);
nsPoint mDestinationPoint;
RefPtr<nsSliderMediator> mMediator;
float mRatio;
nscoord mDragStart;
nscoord mThumbStart;
int32_t mCurPos;
nscoord mChange;
bool mDragFinished;
// true if an attribute change has been caused by the user manipulating the
// slider. This allows notifications to tell how a slider's current position
// was changed.
bool mUserChanged;
// true if we've handed off the scrolling to APZ. This means that we should
// ignore scrolling events as the position will be updated by APZ. If we were
// to process these events then the scroll position update would conflict
// causing the scroll position to jump.
bool mScrollingWithAPZ;
// true if displayport suppression is active, for more performant
// scrollbar-dragging behaviour.
bool mSuppressionActive;
static bool gMiddlePref;
static int32_t gSnapMultiplier;
}; // class nsSliderFrame
#endif
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