| // Copyright 2014 The PDFium Authors |
| // 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 |
| |
| #include "fpdfsdk/pwl/cpwl_scroll_bar.h" |
| |
| #include <math.h> |
| |
| #include <algorithm> |
| #include <sstream> |
| #include <utility> |
| |
| #include "core/fxcrt/check.h" |
| #include "core/fxge/cfx_fillrenderoptions.h" |
| #include "core/fxge/cfx_path.h" |
| #include "core/fxge/cfx_renderdevice.h" |
| #include "fpdfsdk/pwl/cpwl_wnd.h" |
| |
| namespace { |
| |
| constexpr float kButtonWidth = 9.0f; |
| constexpr float kPosButtonMinWidth = 2.0f; |
| |
| } // namespace |
| |
| void PWL_FLOATRANGE::Reset() { |
| fMin = 0.0f; |
| fMax = 0.0f; |
| } |
| |
| void PWL_FLOATRANGE::Set(float min, float max) { |
| fMin = std::min(min, max); |
| fMax = std::max(min, max); |
| } |
| |
| bool PWL_FLOATRANGE::In(float x) const { |
| return (FXSYS_IsFloatBigger(x, fMin) || FXSYS_IsFloatEqual(x, fMin)) && |
| (FXSYS_IsFloatSmaller(x, fMax) || FXSYS_IsFloatEqual(x, fMax)); |
| } |
| |
| float PWL_FLOATRANGE::GetWidth() const { |
| return fMax - fMin; |
| } |
| |
| PWL_SCROLL_PRIVATEDATA::PWL_SCROLL_PRIVATEDATA() { |
| Default(); |
| } |
| |
| void PWL_SCROLL_PRIVATEDATA::Default() { |
| ScrollRange.Reset(); |
| fScrollPos = ScrollRange.fMin; |
| fClientWidth = 0; |
| fBigStep = 10; |
| fSmallStep = 1; |
| } |
| |
| void PWL_SCROLL_PRIVATEDATA::SetScrollRange(float min, float max) { |
| ScrollRange.Set(min, max); |
| |
| if (FXSYS_IsFloatSmaller(fScrollPos, ScrollRange.fMin)) |
| fScrollPos = ScrollRange.fMin; |
| if (FXSYS_IsFloatBigger(fScrollPos, ScrollRange.fMax)) |
| fScrollPos = ScrollRange.fMax; |
| } |
| |
| void PWL_SCROLL_PRIVATEDATA::SetClientWidth(float width) { |
| fClientWidth = width; |
| } |
| |
| void PWL_SCROLL_PRIVATEDATA::SetSmallStep(float step) { |
| fSmallStep = step; |
| } |
| |
| void PWL_SCROLL_PRIVATEDATA::SetBigStep(float step) { |
| fBigStep = step; |
| } |
| |
| bool PWL_SCROLL_PRIVATEDATA::SetPos(float pos) { |
| if (ScrollRange.In(pos)) { |
| fScrollPos = pos; |
| return true; |
| } |
| return false; |
| } |
| |
| void PWL_SCROLL_PRIVATEDATA::AddSmall() { |
| if (!SetPos(fScrollPos + fSmallStep)) |
| SetPos(ScrollRange.fMax); |
| } |
| |
| void PWL_SCROLL_PRIVATEDATA::SubSmall() { |
| if (!SetPos(fScrollPos - fSmallStep)) |
| SetPos(ScrollRange.fMin); |
| } |
| |
| void PWL_SCROLL_PRIVATEDATA::AddBig() { |
| if (!SetPos(fScrollPos + fBigStep)) |
| SetPos(ScrollRange.fMax); |
| } |
| |
| void PWL_SCROLL_PRIVATEDATA::SubBig() { |
| if (!SetPos(fScrollPos - fBigStep)) |
| SetPos(ScrollRange.fMin); |
| } |
| |
| CPWL_ScrollBar::CPWL_ScrollBar( |
| const CreateParams& cp, |
| std::unique_ptr<IPWL_FillerNotify::PerWindowData> pAttachedData) |
| : CPWL_Wnd(cp, std::move(pAttachedData)) { |
| GetCreationParams()->eCursorType = IPWL_FillerNotify::CursorStyle::kArrow; |
| } |
| |
| CPWL_ScrollBar::~CPWL_ScrollBar() = default; |
| |
| void CPWL_ScrollBar::OnDestroy() { |
| // Until cleanup takes place in the virtual destructor for CPWL_Wnd |
| // subclasses, implement the virtual OnDestroy method that does the |
| // cleanup first, then invokes the superclass OnDestroy ... gee, |
| // like a dtor would. |
| m_pMinButton.ExtractAsDangling(); |
| m_pMaxButton.ExtractAsDangling(); |
| m_pPosButton.ExtractAsDangling(); |
| CPWL_Wnd::OnDestroy(); |
| } |
| |
| bool CPWL_ScrollBar::RepositionChildWnd() { |
| ObservedPtr<CPWL_ScrollBar> this_observed(this); |
| CFX_FloatRect rcClient = this_observed->GetClientRect(); |
| CFX_FloatRect rcMinButton; |
| CFX_FloatRect rcMaxButton; |
| if (FXSYS_IsFloatBigger(rcClient.top - rcClient.bottom, |
| kButtonWidth * 2 + kPosButtonMinWidth + 2)) { |
| rcMinButton = CFX_FloatRect(rcClient.left, rcClient.top - kButtonWidth, |
| rcClient.right, rcClient.top); |
| rcMaxButton = CFX_FloatRect(rcClient.left, rcClient.bottom, rcClient.right, |
| rcClient.bottom + kButtonWidth); |
| } else { |
| float fBWidth = |
| (rcClient.top - rcClient.bottom - kPosButtonMinWidth - 2) / 2; |
| if (FXSYS_IsFloatBigger(fBWidth, 0)) { |
| rcMinButton = CFX_FloatRect(rcClient.left, rcClient.top - fBWidth, |
| rcClient.right, rcClient.top); |
| rcMaxButton = CFX_FloatRect(rcClient.left, rcClient.bottom, |
| rcClient.right, rcClient.bottom + fBWidth); |
| } else { |
| if (!this_observed->SetVisible(false)) { |
| return false; |
| } |
| } |
| } |
| if (this_observed->m_pMinButton) { |
| this_observed->m_pMinButton->Move(rcMinButton, true, false); |
| if (!this_observed) { |
| return false; |
| } |
| } |
| if (this_observed->m_pMaxButton) { |
| this_observed->m_pMaxButton->Move(rcMaxButton, true, false); |
| if (!this_observed) { |
| return false; |
| } |
| } |
| return this_observed->MovePosButton(false); |
| } |
| |
| void CPWL_ScrollBar::DrawThisAppearance(CFX_RenderDevice* pDevice, |
| const CFX_Matrix& mtUser2Device) { |
| CFX_FloatRect rectWnd = GetWindowRect(); |
| |
| if (IsVisible() && !rectWnd.IsEmpty()) { |
| pDevice->DrawFillRect(&mtUser2Device, rectWnd, GetBackgroundColor(), |
| GetTransparency()); |
| |
| pDevice->DrawStrokeLine( |
| &mtUser2Device, CFX_PointF(rectWnd.left + 2.0f, rectWnd.top - 2.0f), |
| CFX_PointF(rectWnd.left + 2.0f, rectWnd.bottom + 2.0f), |
| ArgbEncode(GetTransparency(), 100, 100, 100), 1.0f); |
| |
| pDevice->DrawStrokeLine( |
| &mtUser2Device, CFX_PointF(rectWnd.right - 2.0f, rectWnd.top - 2.0f), |
| CFX_PointF(rectWnd.right - 2.0f, rectWnd.bottom + 2.0f), |
| ArgbEncode(GetTransparency(), 100, 100, 100), 1.0f); |
| } |
| } |
| |
| bool CPWL_ScrollBar::OnLButtonDown(Mask<FWL_EVENTFLAG> nFlag, |
| const CFX_PointF& point) { |
| CPWL_Wnd::OnLButtonDown(nFlag, point); |
| |
| if (HasFlag(PWS_AUTOTRANSPARENT)) { |
| if (GetTransparency() != 255) { |
| SetTransparency(255); |
| if (!InvalidateRect(nullptr)) |
| return true; |
| } |
| } |
| |
| if (m_pPosButton && m_pPosButton->IsVisible()) { |
| CFX_FloatRect rcClient = GetClientRect(); |
| CFX_FloatRect rcPosButton = m_pPosButton->GetWindowRect(); |
| CFX_FloatRect rcMinArea = |
| CFX_FloatRect(rcClient.left, rcPosButton.top, rcClient.right, |
| rcClient.top - kButtonWidth); |
| CFX_FloatRect rcMaxArea = |
| CFX_FloatRect(rcClient.left, rcClient.bottom + kButtonWidth, |
| rcClient.right, rcPosButton.bottom); |
| |
| rcMinArea.Normalize(); |
| rcMaxArea.Normalize(); |
| |
| if (rcMinArea.Contains(point)) { |
| m_sData.SubBig(); |
| if (!MovePosButton(true)) |
| return true; |
| NotifyScrollWindow(); |
| } |
| |
| if (rcMaxArea.Contains(point)) { |
| m_sData.AddBig(); |
| if (!MovePosButton(true)) |
| return true; |
| NotifyScrollWindow(); |
| } |
| } |
| |
| return true; |
| } |
| |
| bool CPWL_ScrollBar::OnLButtonUp(Mask<FWL_EVENTFLAG> nFlag, |
| const CFX_PointF& point) { |
| CPWL_Wnd::OnLButtonUp(nFlag, point); |
| |
| if (HasFlag(PWS_AUTOTRANSPARENT)) { |
| if (GetTransparency() != kTransparency) { |
| SetTransparency(kTransparency); |
| if (!InvalidateRect(nullptr)) |
| return true; |
| } |
| } |
| |
| m_pTimer.reset(); |
| m_bMouseDown = false; |
| return true; |
| } |
| |
| void CPWL_ScrollBar::SetScrollInfo(const PWL_SCROLL_INFO& info) { |
| if (info == m_OriginInfo) |
| return; |
| |
| m_OriginInfo = info; |
| float fMax = |
| std::max(0.0f, info.fContentMax - info.fContentMin - info.fPlateWidth); |
| SetScrollRange(0, fMax, info.fPlateWidth); |
| SetScrollStep(info.fBigStep, info.fSmallStep); |
| } |
| |
| void CPWL_ScrollBar::SetScrollPosition(float pos) { |
| pos = m_OriginInfo.fContentMax - pos; |
| SetScrollPos(pos); |
| } |
| |
| void CPWL_ScrollBar::NotifyLButtonDown(CPWL_Wnd* child, const CFX_PointF& pos) { |
| if (child == m_pMinButton) |
| OnMinButtonLBDown(pos); |
| else if (child == m_pMaxButton) |
| OnMaxButtonLBDown(pos); |
| else if (child == m_pPosButton) |
| OnPosButtonLBDown(pos); |
| } |
| |
| void CPWL_ScrollBar::NotifyLButtonUp(CPWL_Wnd* child, const CFX_PointF& pos) { |
| if (child == m_pMinButton) |
| OnMinButtonLBUp(pos); |
| else if (child == m_pMaxButton) |
| OnMaxButtonLBUp(pos); |
| else if (child == m_pPosButton) |
| OnPosButtonLBUp(pos); |
| } |
| |
| void CPWL_ScrollBar::NotifyMouseMove(CPWL_Wnd* child, const CFX_PointF& pos) { |
| if (child == m_pMinButton) |
| OnMinButtonMouseMove(pos); |
| else if (child == m_pMaxButton) |
| OnMaxButtonMouseMove(pos); |
| else if (child == m_pPosButton) |
| OnPosButtonMouseMove(pos); |
| } |
| |
| void CPWL_ScrollBar::CreateButtons(const CreateParams& cp) { |
| ObservedPtr<CPWL_ScrollBar> this_observed(this); |
| |
| CreateParams scp = cp; |
| scp.dwBorderWidth = 2; |
| scp.nBorderStyle = BorderStyle::kBeveled; |
| scp.dwFlags = PWS_VISIBLE | PWS_BORDER | PWS_BACKGROUND | PWS_NOREFRESHCLIP; |
| |
| if (!this_observed->m_pMinButton) { |
| auto pButton = |
| std::make_unique<CPWL_SBButton>(scp, this_observed->CloneAttachedData(), |
| CPWL_SBButton::Type::kMinButton); |
| this_observed->m_pMinButton = pButton.get(); |
| this_observed->AddChild(std::move(pButton)); |
| this_observed->m_pMinButton->Realize(); |
| } |
| if (!this_observed->m_pMaxButton) { |
| auto pButton = |
| std::make_unique<CPWL_SBButton>(scp, this_observed->CloneAttachedData(), |
| CPWL_SBButton::Type::kMaxButton); |
| this_observed->m_pMaxButton = pButton.get(); |
| this_observed->AddChild(std::move(pButton)); |
| this_observed->m_pMaxButton->Realize(); |
| } |
| if (!this_observed->m_pPosButton) { |
| auto pButton = |
| std::make_unique<CPWL_SBButton>(scp, this_observed->CloneAttachedData(), |
| CPWL_SBButton::Type::kPosButton); |
| this_observed->m_pPosButton = pButton.get(); |
| if (this_observed->m_pPosButton->SetVisible(false) && this_observed) { |
| this_observed->AddChild(std::move(pButton)); |
| this_observed->m_pPosButton->Realize(); |
| } |
| } |
| } |
| |
| float CPWL_ScrollBar::GetScrollBarWidth() const { |
| return IsVisible() ? kWidth : 0.0f; |
| } |
| |
| void CPWL_ScrollBar::SetScrollRange(float fMin, |
| float fMax, |
| float fClientWidth) { |
| ObservedPtr<CPWL_ScrollBar> this_observed(this); |
| if (!this_observed->m_pPosButton) { |
| return; |
| } |
| this_observed->m_sData.SetScrollRange(fMin, fMax); |
| this_observed->m_sData.SetClientWidth(fClientWidth); |
| |
| if (FXSYS_IsFloatSmaller(this_observed->m_sData.ScrollRange.GetWidth(), |
| 0.0f)) { |
| (void)this_observed->m_pPosButton->SetVisible(false); |
| // Note, |this| may no longer be viable at this point. If more work needs |
| // to be done, check this_observed. |
| return; |
| } |
| |
| if (!this_observed->m_pPosButton->SetVisible(true) || !this_observed) { |
| return; |
| } |
| |
| (void)this_observed->MovePosButton(true); |
| // Note, |this| may no longer be viable at this point. If more work needs |
| // to be done, check the return value of MovePosButton(). |
| } |
| |
| void CPWL_ScrollBar::SetScrollPos(float fPos) { |
| float fOldPos = m_sData.fScrollPos; |
| m_sData.SetPos(fPos); |
| if (!FXSYS_IsFloatEqual(m_sData.fScrollPos, fOldPos)) { |
| (void)MovePosButton(true); |
| // Note, |this| may no longer be viable at this point. If more work needs |
| // to be done, check the return value of MovePosButton(). |
| } |
| } |
| |
| void CPWL_ScrollBar::SetScrollStep(float fBigStep, float fSmallStep) { |
| m_sData.SetBigStep(fBigStep); |
| m_sData.SetSmallStep(fSmallStep); |
| } |
| |
| bool CPWL_ScrollBar::MovePosButton(bool bRefresh) { |
| ObservedPtr<CPWL_ScrollBar> this_observed(this); |
| |
| DCHECK(m_pMinButton); |
| DCHECK(m_pMaxButton); |
| |
| if (this_observed->m_pPosButton->IsVisible()) { |
| CFX_FloatRect rcPosArea = this_observed->GetScrollArea(); |
| float fTop = this_observed->TrueToFace(m_sData.fScrollPos); |
| float fBottom = |
| this_observed->TrueToFace(m_sData.fScrollPos + m_sData.fClientWidth); |
| if (FXSYS_IsFloatSmaller(fTop - fBottom, kPosButtonMinWidth)) { |
| fBottom = fTop - kPosButtonMinWidth; |
| } |
| if (FXSYS_IsFloatSmaller(fBottom, rcPosArea.bottom)) { |
| fBottom = rcPosArea.bottom; |
| fTop = fBottom + kPosButtonMinWidth; |
| } |
| |
| CFX_FloatRect rcPosButton = |
| CFX_FloatRect(rcPosArea.left, fBottom, rcPosArea.right, fTop); |
| |
| this_observed->m_pPosButton->Move(rcPosButton, true, bRefresh); |
| if (!this_observed) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| void CPWL_ScrollBar::OnMinButtonLBDown(const CFX_PointF& point) { |
| m_sData.SubSmall(); |
| if (!MovePosButton(true)) |
| return; |
| |
| NotifyScrollWindow(); |
| m_bMinOrMax = true; |
| m_pTimer = std::make_unique<CFX_Timer>(GetTimerHandler(), this, 100); |
| } |
| |
| void CPWL_ScrollBar::OnMinButtonLBUp(const CFX_PointF& point) {} |
| |
| void CPWL_ScrollBar::OnMinButtonMouseMove(const CFX_PointF& point) {} |
| |
| void CPWL_ScrollBar::OnMaxButtonLBDown(const CFX_PointF& point) { |
| m_sData.AddSmall(); |
| if (!MovePosButton(true)) |
| return; |
| |
| NotifyScrollWindow(); |
| m_bMinOrMax = false; |
| m_pTimer = std::make_unique<CFX_Timer>(GetTimerHandler(), this, 100); |
| } |
| |
| void CPWL_ScrollBar::OnMaxButtonLBUp(const CFX_PointF& point) {} |
| |
| void CPWL_ScrollBar::OnMaxButtonMouseMove(const CFX_PointF& point) {} |
| |
| void CPWL_ScrollBar::OnPosButtonLBDown(const CFX_PointF& point) { |
| m_bMouseDown = true; |
| |
| if (m_pPosButton) { |
| CFX_FloatRect rcPosButton = m_pPosButton->GetWindowRect(); |
| m_nOldPos = point.y; |
| m_fOldPosButton = rcPosButton.top; |
| } |
| } |
| |
| void CPWL_ScrollBar::OnPosButtonLBUp(const CFX_PointF& point) { |
| m_bMouseDown = false; |
| } |
| |
| void CPWL_ScrollBar::OnPosButtonMouseMove(const CFX_PointF& point) { |
| if (fabs(point.y - m_nOldPos) < 1) |
| return; |
| |
| float fOldScrollPos = m_sData.fScrollPos; |
| float fNewPos = FaceToTrue(m_fOldPosButton + point.y - m_nOldPos); |
| if (m_bMouseDown) { |
| if (FXSYS_IsFloatSmaller(fNewPos, m_sData.ScrollRange.fMin)) { |
| fNewPos = m_sData.ScrollRange.fMin; |
| } |
| |
| if (FXSYS_IsFloatBigger(fNewPos, m_sData.ScrollRange.fMax)) { |
| fNewPos = m_sData.ScrollRange.fMax; |
| } |
| |
| m_sData.SetPos(fNewPos); |
| |
| if (!FXSYS_IsFloatEqual(fOldScrollPos, m_sData.fScrollPos)) { |
| if (!MovePosButton(true)) |
| return; |
| |
| NotifyScrollWindow(); |
| } |
| } |
| } |
| |
| void CPWL_ScrollBar::NotifyScrollWindow() { |
| CPWL_Wnd* pParent = GetParentWindow(); |
| if (!pParent) |
| return; |
| |
| pParent->ScrollWindowVertically(m_OriginInfo.fContentMax - |
| m_sData.fScrollPos); |
| } |
| |
| CFX_FloatRect CPWL_ScrollBar::GetScrollArea() const { |
| CFX_FloatRect rcClient = GetClientRect(); |
| if (!m_pMinButton || !m_pMaxButton) |
| return rcClient; |
| |
| CFX_FloatRect rcMin = m_pMinButton->GetWindowRect(); |
| CFX_FloatRect rcMax = m_pMaxButton->GetWindowRect(); |
| float fMinHeight = rcMin.Height(); |
| float fMaxHeight = rcMax.Height(); |
| |
| CFX_FloatRect rcArea; |
| if (rcClient.top - rcClient.bottom > fMinHeight + fMaxHeight + 2) { |
| rcArea = CFX_FloatRect(rcClient.left, rcClient.bottom + fMinHeight + 1, |
| rcClient.right, rcClient.top - fMaxHeight - 1); |
| } else { |
| rcArea = CFX_FloatRect(rcClient.left, rcClient.bottom + fMinHeight + 1, |
| rcClient.right, rcClient.bottom + fMinHeight + 1); |
| } |
| |
| rcArea.Normalize(); |
| return rcArea; |
| } |
| |
| float CPWL_ScrollBar::TrueToFace(float fTrue) { |
| CFX_FloatRect rcPosArea = GetScrollArea(); |
| float fFactWidth = m_sData.ScrollRange.GetWidth() + m_sData.fClientWidth; |
| fFactWidth = fFactWidth == 0 ? 1 : fFactWidth; |
| return rcPosArea.top - |
| fTrue * (rcPosArea.top - rcPosArea.bottom) / fFactWidth; |
| } |
| |
| float CPWL_ScrollBar::FaceToTrue(float fFace) { |
| CFX_FloatRect rcPosArea = GetScrollArea(); |
| float fFactWidth = m_sData.ScrollRange.GetWidth() + m_sData.fClientWidth; |
| fFactWidth = fFactWidth == 0 ? 1 : fFactWidth; |
| return (rcPosArea.top - fFace) * fFactWidth / |
| (rcPosArea.top - rcPosArea.bottom); |
| } |
| |
| void CPWL_ScrollBar::CreateChildWnd(const CreateParams& cp) { |
| CreateButtons(cp); |
| } |
| |
| void CPWL_ScrollBar::OnTimerFired() { |
| PWL_SCROLL_PRIVATEDATA sTemp = m_sData; |
| if (m_bMinOrMax) |
| m_sData.SubSmall(); |
| else |
| m_sData.AddSmall(); |
| |
| if (sTemp == m_sData) |
| return; |
| |
| if (!MovePosButton(true)) |
| return; |
| |
| NotifyScrollWindow(); |
| } |