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diff --git a/fpdfsdk/pwl/cpwl_scroll_bar.h b/fpdfsdk/pwl/cpwl_scroll_bar.h
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+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef FPDFSDK_PWL_CPWL_SCROLL_BAR_H_
+#define FPDFSDK_PWL_CPWL_SCROLL_BAR_H_
+
+#include "core/fxcrt/cfx_unowned_ptr.h"
+#include "fpdfsdk/pwl/cpwl_wnd.h"
+
+class CPWL_SBButton;
+class CPWL_ScrollBar;
+
+struct PWL_SCROLL_INFO {
+ public:
+ PWL_SCROLL_INFO()
+ : fContentMin(0.0f),
+ fContentMax(0.0f),
+ fPlateWidth(0.0f),
+ fBigStep(0.0f),
+ fSmallStep(0.0f) {}
+
+ bool operator==(const PWL_SCROLL_INFO& that) const {
+ return fContentMin == that.fContentMin && fContentMax == that.fContentMax &&
+ fPlateWidth == that.fPlateWidth && fBigStep == that.fBigStep &&
+ fSmallStep == that.fSmallStep;
+ }
+ bool operator!=(const PWL_SCROLL_INFO& that) const {
+ return !(*this == that);
+ }
+
+ float fContentMin;
+ float fContentMax;
+ float fPlateWidth;
+ float fBigStep;
+ float fSmallStep;
+};
+
+enum PWL_SCROLLBAR_TYPE { SBT_HSCROLL, SBT_VSCROLL };
+
+enum PWL_SBBUTTON_TYPE { PSBT_MIN, PSBT_MAX, PSBT_POS };
+
+class CPWL_SBButton : public CPWL_Wnd {
+ public:
+ CPWL_SBButton(PWL_SCROLLBAR_TYPE eScrollBarType,
+ PWL_SBBUTTON_TYPE eButtonType);
+ ~CPWL_SBButton() override;
+
+ // CPWL_Wnd
+ CFX_ByteString GetClassName() const override;
+ void OnCreate(PWL_CREATEPARAM& cp) override;
+ void DrawThisAppearance(CFX_RenderDevice* pDevice,
+ CFX_Matrix* pUser2Device) override;
+ bool OnLButtonDown(const CFX_PointF& point, uint32_t nFlag) override;
+ bool OnLButtonUp(const CFX_PointF& point, uint32_t nFlag) override;
+ bool OnMouseMove(const CFX_PointF& point, uint32_t nFlag) override;
+
+ protected:
+ PWL_SCROLLBAR_TYPE m_eScrollBarType;
+ PWL_SBBUTTON_TYPE m_eSBButtonType;
+
+ bool m_bMouseDown;
+};
+
+struct PWL_FLOATRANGE {
+ public:
+ PWL_FLOATRANGE();
+ PWL_FLOATRANGE(float min, float max);
+
+ bool operator==(const PWL_FLOATRANGE& that) const {
+ return fMin == that.fMin && fMax == that.fMax;
+ }
+ bool operator!=(const PWL_FLOATRANGE& that) const { return !(*this == that); }
+
+ void Default();
+ void Set(float min, float max);
+ bool In(float x) const;
+ float GetWidth() const;
+
+ float fMin;
+ float fMax;
+};
+
+struct PWL_SCROLL_PRIVATEDATA {
+ public:
+ PWL_SCROLL_PRIVATEDATA();
+
+ bool operator==(const PWL_SCROLL_PRIVATEDATA& that) const {
+ return ScrollRange == that.ScrollRange &&
+ fClientWidth == that.fClientWidth && fScrollPos == that.fScrollPos &&
+ fBigStep == that.fBigStep && fSmallStep == that.fSmallStep;
+ }
+ bool operator!=(const PWL_SCROLL_PRIVATEDATA& that) const {
+ return !(*this == that);
+ }
+
+ void Default();
+ void SetScrollRange(float min, float max);
+ void SetClientWidth(float width);
+ void SetSmallStep(float step);
+ void SetBigStep(float step);
+ bool SetPos(float pos);
+
+ void AddSmall();
+ void SubSmall();
+ void AddBig();
+ void SubBig();
+
+ PWL_FLOATRANGE ScrollRange;
+ float fClientWidth;
+ float fScrollPos;
+ float fBigStep;
+ float fSmallStep;
+};
+
+class CPWL_ScrollBar : public CPWL_Wnd {
+ public:
+ explicit CPWL_ScrollBar(PWL_SCROLLBAR_TYPE sbType = SBT_HSCROLL);
+ ~CPWL_ScrollBar() override;
+
+ // CPWL_Wnd
+ CFX_ByteString GetClassName() const override;
+ void OnCreate(PWL_CREATEPARAM& cp) override;
+ void OnDestroy() override;
+ void RePosChildWnd() override;
+ void DrawThisAppearance(CFX_RenderDevice* pDevice,
+ CFX_Matrix* pUser2Device) override;
+ bool OnLButtonDown(const CFX_PointF& point, uint32_t nFlag) override;
+ bool OnLButtonUp(const CFX_PointF& point, uint32_t nFlag) override;
+ void SetScrollInfo(const PWL_SCROLL_INFO& info) override;
+ void SetScrollPosition(float pos) override;
+ void NotifyLButtonDown(CPWL_Wnd* child, const CFX_PointF& pos) override;
+ void NotifyLButtonUp(CPWL_Wnd* child, const CFX_PointF& pos) override;
+ void NotifyMouseMove(CPWL_Wnd* child, const CFX_PointF& pos) override;
+ void CreateChildWnd(const PWL_CREATEPARAM& cp) override;
+ void TimerProc() override;
+
+ float GetScrollBarWidth() const;
+ PWL_SCROLLBAR_TYPE GetScrollBarType() const { return m_sbType; }
+
+ void SetNotifyForever(bool bForever) { m_bNotifyForever = bForever; }
+
+ protected:
+ void SetScrollRange(float fMin, float fMax, float fClientWidth);
+ void SetScrollPos(float fPos);
+ void MovePosButton(bool bRefresh);
+ void SetScrollStep(float fBigStep, float fSmallStep);
+ void NotifyScrollWindow();
+ CFX_FloatRect GetScrollArea() const;
+
+ private:
+ void CreateButtons(const PWL_CREATEPARAM& cp);
+
+ void OnMinButtonLBDown(const CFX_PointF& point);
+ void OnMinButtonLBUp(const CFX_PointF& point);
+ void OnMinButtonMouseMove(const CFX_PointF& point);
+
+ void OnMaxButtonLBDown(const CFX_PointF& point);
+ void OnMaxButtonLBUp(const CFX_PointF& point);
+ void OnMaxButtonMouseMove(const CFX_PointF& point);
+
+ void OnPosButtonLBDown(const CFX_PointF& point);
+ void OnPosButtonLBUp(const CFX_PointF& point);
+ void OnPosButtonMouseMove(const CFX_PointF& point);
+
+ float TrueToFace(float);
+ float FaceToTrue(float);
+
+ PWL_SCROLLBAR_TYPE m_sbType;
+ PWL_SCROLL_INFO m_OriginInfo;
+ CFX_UnownedPtr<CPWL_SBButton> m_pMinButton;
+ CFX_UnownedPtr<CPWL_SBButton> m_pMaxButton;
+ CFX_UnownedPtr<CPWL_SBButton> m_pPosButton;
+ PWL_SCROLL_PRIVATEDATA m_sData;
+ bool m_bMouseDown;
+ bool m_bMinOrMax;
+ bool m_bNotifyForever;
+ float m_nOldPos;
+ float m_fOldPosButton;
+};
+
+#endif // FPDFSDK_PWL_CPWL_SCROLL_BAR_H_