// 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

#include "../../include/formfiller/FFL_FormFiller.h"
#include "../../include/formfiller/FFL_IFormFiller.h"
#include "../../include/formfiller/FFL_CheckBox.h"
#include "../../include/formfiller/FFL_ComboBox.h"
#include "../../include/formfiller/FFL_ListBox.h"
#include "../../include/formfiller/FFL_PushButton.h"
#include "../../include/formfiller/FFL_RadioButton.h"
#include "../../include/formfiller/FFL_TextField.h"

#define FFL_MAXLISTBOXHEIGHT        140.0f

// HHOOK CFFL_IFormFiller::m_hookSheet = NULL;
// MSG CFFL_IFormFiller::g_Msg;

/* ----------------------------- CFFL_IFormFiller ----------------------------- */

CFFL_IFormFiller::CFFL_IFormFiller(CPDFDoc_Environment* pApp) :
    m_pApp(pApp),
    m_bNotifying(FALSE)
{
}

CFFL_IFormFiller::~CFFL_IFormFiller()
{
    for (auto& it : m_Maps)
        delete it.second;
    m_Maps.clear();
}

FX_BOOL CFFL_IFormFiller::Annot_HitTest(CPDFSDK_PageView* pPageView,CPDFSDK_Annot* pAnnot, CPDF_Point point)
{
    CPDF_Rect rc = pAnnot->GetRect();
    if(rc.Contains(point.x, point.y))
        return TRUE;
    return FALSE;
}

FX_RECT CFFL_IFormFiller::GetViewBBox(CPDFSDK_PageView* pPageView, CPDFSDK_Annot* pAnnot)
{
    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
        return pFormFiller->GetViewBBox(pPageView, pAnnot);

    ASSERT(pPageView != NULL);

    CPDF_Annot* pPDFAnnot = pAnnot->GetPDFAnnot();
    CPDF_Rect rcAnnot;
    pPDFAnnot->GetRect(rcAnnot);

    CPDF_Rect rcWin = CPWL_Utils::InflateRect(rcAnnot, 1);
    return rcWin.GetOutterRect();
}

void CFFL_IFormFiller::OnDraw(CPDFSDK_PageView* pPageView, /*HDC hDC,*/ CPDFSDK_Annot* pAnnot,
                        CFX_RenderDevice* pDevice, CPDF_Matrix* pUser2Device,
                        /*const CRect& rcWindow,*/ FX_DWORD dwFlags)
{
    ASSERT(pPageView != NULL);
    CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;

    if (IsVisible(pWidget))
    {
        if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
        {
            if (pFormFiller->IsValid())
            {
                pFormFiller->OnDraw(pPageView, pAnnot, pDevice, pUser2Device, dwFlags);
                pAnnot->GetPDFPage();

                CPDFSDK_Document* pDocument = m_pApp->GetSDKDocument();
                if (pDocument->GetFocusAnnot() == pAnnot)
                {
                    CPDF_Rect rcFocus = pFormFiller->GetFocusBox(pPageView);
                    if (!rcFocus.IsEmpty())
                    {
                        CFX_PathData path;
                        path.SetPointCount(5);
                        path.SetPoint(0, rcFocus.left,  rcFocus.top, FXPT_MOVETO);
                        path.SetPoint(1, rcFocus.left,  rcFocus.bottom, FXPT_LINETO);
                        path.SetPoint(2, rcFocus.right,  rcFocus.bottom, FXPT_LINETO);
                        path.SetPoint(3, rcFocus.right,  rcFocus.top, FXPT_LINETO);
                        path.SetPoint(4, rcFocus.left,  rcFocus.top, FXPT_LINETO);

                        CFX_GraphStateData gsd;
                        gsd.SetDashCount(1);
                        gsd.m_DashArray[0] = 1.0f;
                        gsd.m_DashPhase = 0;
                        gsd.m_LineWidth = 1.0f;
                        pDevice->DrawPath(&path, pUser2Device, &gsd, 0, ArgbEncode(255,0,0,0), FXFILL_ALTERNATE);
                    }
                }
                return;
            }
        }

        if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
            pFormFiller->OnDrawDeactive(pPageView, pAnnot, pDevice, pUser2Device, dwFlags);
        else
            pWidget->DrawAppearance(pDevice, pUser2Device, CPDF_Annot::Normal, NULL);

        if (!IsReadOnly(pWidget) && IsFillingAllowed(pWidget))
            pWidget->DrawShadow(pDevice, pPageView);
    }
}

void CFFL_IFormFiller::OnCreate(CPDFSDK_Annot* pAnnot)
{
    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
    {
        pFormFiller->OnCreate(pAnnot);
    }
}

void CFFL_IFormFiller::OnLoad(CPDFSDK_Annot* pAnnot)
{
    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
    {
        pFormFiller->OnLoad(pAnnot);
    }
}

void CFFL_IFormFiller::OnDelete(CPDFSDK_Annot* pAnnot)
{
    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
    {
        pFormFiller->OnDelete(pAnnot);
    }

    UnRegisterFormFiller(pAnnot);
}

void CFFL_IFormFiller::OnMouseEnter(CPDFSDK_PageView* pPageView, CPDFSDK_Annot* pAnnot, FX_UINT nFlag)
{
    ASSERT(pAnnot != NULL);
    ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");

    if (!m_bNotifying)
    {
        CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
        if (pWidget->GetAAction(CPDF_AAction::CursorEnter))
        {
            m_bNotifying = TRUE;

            int nValueAge = pWidget->GetValueAge();

            pWidget->ClearAppModified();

            ASSERT(pPageView != NULL);


            PDFSDK_FieldAction fa;
            fa.bModifier = m_pApp->FFI_IsCTRLKeyDown(nFlag);
            fa.bShift = m_pApp->FFI_IsSHIFTKeyDown(nFlag);
            pWidget->OnAAction(CPDF_AAction::CursorEnter, fa, pPageView );
            m_bNotifying = FALSE;

            //if ( !IsValidAnnot(pPageView, pAnnot) ) return;

            if (pWidget->IsAppModified())
            {
                if (CFFL_FormFiller* pFormFiller = GetFormFiller(pWidget, FALSE))
                {
                    pFormFiller->ResetPDFWindow(pPageView, pWidget->GetValueAge() == nValueAge);
                }
            }
        }
    }

    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, TRUE))
    {
        pFormFiller->OnMouseEnter(pPageView, pAnnot);
    }
}

void CFFL_IFormFiller::OnMouseExit(CPDFSDK_PageView* pPageView, CPDFSDK_Annot* pAnnot, FX_UINT nFlag)
{
    ASSERT(pAnnot != NULL);
    ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");

    if (!m_bNotifying)
    {
        CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
        if (pWidget->GetAAction(CPDF_AAction::CursorExit))
        {
            m_bNotifying = TRUE;
            pWidget->GetAppearanceAge();
            int nValueAge = pWidget->GetValueAge();
            pWidget->ClearAppModified();

            ASSERT(pPageView != NULL);


            PDFSDK_FieldAction fa;
            fa.bModifier = m_pApp->FFI_IsCTRLKeyDown(nFlag);
            fa.bShift = m_pApp->FFI_IsSHIFTKeyDown(nFlag);

            pWidget->OnAAction(CPDF_AAction::CursorExit, fa, pPageView);
            m_bNotifying = FALSE;

            //if (!IsValidAnnot(pPageView, pAnnot)) return;

            if (pWidget->IsAppModified())
            {
                if (CFFL_FormFiller* pFormFiller = GetFormFiller(pWidget, FALSE))
                {
                    pFormFiller->ResetPDFWindow(pPageView, nValueAge == pWidget->GetValueAge());
                }
            }
        }
    }

    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
    {
        pFormFiller->OnMouseExit(pPageView, pAnnot);
    }
}

FX_BOOL CFFL_IFormFiller::OnLButtonDown(CPDFSDK_PageView* pPageView, CPDFSDK_Annot* pAnnot, FX_UINT nFlags, const CPDF_Point& point)
{
    ASSERT(pAnnot != NULL);
    ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");

    if (!m_bNotifying)
    {
        CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
        if (Annot_HitTest(pPageView, pAnnot, point) && pWidget->GetAAction(CPDF_AAction::ButtonDown))
        {
            m_bNotifying = TRUE;
            pWidget->GetAppearanceAge();
            int nValueAge = pWidget->GetValueAge();
            pWidget->ClearAppModified();

            ASSERT(pPageView != NULL);


            PDFSDK_FieldAction fa;
            fa.bModifier = m_pApp->FFI_IsCTRLKeyDown(nFlags);
            fa.bShift = m_pApp->FFI_IsSHIFTKeyDown(nFlags);
            pWidget->OnAAction(CPDF_AAction::ButtonDown, fa, pPageView);
            m_bNotifying = FALSE;

            if (!IsValidAnnot(pPageView, pAnnot)) return TRUE;

            if (pWidget->IsAppModified())
            {
                if (CFFL_FormFiller* pFormFiller = GetFormFiller(pWidget, FALSE))
                {
                    pFormFiller->ResetPDFWindow(pPageView, nValueAge == pWidget->GetValueAge());
                }
            }
        }
    }

    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
    {
        return pFormFiller->OnLButtonDown(pPageView, pAnnot, nFlags, point);
    }

    return FALSE;
}

FX_BOOL CFFL_IFormFiller::OnLButtonUp(CPDFSDK_PageView* pPageView, CPDFSDK_Annot* pAnnot, FX_UINT nFlags, const CPDF_Point& point)
{
    ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
    CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
    CPDFSDK_Document* pDocument = m_pApp->GetSDKDocument();

    switch (pWidget->GetFieldType())
    {
    case FIELDTYPE_PUSHBUTTON:
    case FIELDTYPE_CHECKBOX:
    case FIELDTYPE_RADIOBUTTON:
        if (GetViewBBox(pPageView, pAnnot).Contains((int)point.x, (int)point.y))
            pDocument->SetFocusAnnot(pAnnot);
        break;
    default:
        pDocument->SetFocusAnnot(pAnnot);
        break;
    }

    FX_BOOL bRet = FALSE;

    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
    {
        bRet = pFormFiller->OnLButtonUp(pPageView, pAnnot, nFlags, point);
    }

    if (pDocument->GetFocusAnnot() == pAnnot)
    {
        FX_BOOL bExit = FALSE;
        FX_BOOL bReset = FALSE;
        OnButtonUp(pWidget, pPageView, bReset, bExit,nFlags);
        if (bExit) return TRUE;
    }
    return bRet;
}

void CFFL_IFormFiller::OnButtonUp(CPDFSDK_Widget* pWidget, CPDFSDK_PageView* pPageView, FX_BOOL& bReset, FX_BOOL& bExit,FX_UINT nFlag)
{
    ASSERT(pWidget != NULL);

    if (!m_bNotifying)
    {
        if (pWidget->GetAAction(CPDF_AAction::ButtonUp))
        {
            m_bNotifying = TRUE;
            int nAge = pWidget->GetAppearanceAge();
            int nValueAge = pWidget->GetValueAge();

            ASSERT(pPageView != NULL);
//          CReader_DocView* pDocView = pPageView->GetDocView();
//          ASSERT(pDocView != NULL);


            PDFSDK_FieldAction fa;
            fa.bModifier = m_pApp->FFI_IsCTRLKeyDown(nFlag);
            fa.bShift = m_pApp->FFI_IsSHIFTKeyDown(nFlag);

            pWidget->OnAAction(CPDF_AAction::ButtonUp, fa, pPageView);
            m_bNotifying = FALSE;

            if (!IsValidAnnot(pPageView, pWidget))
            {
                bExit = TRUE;
                return;
            }

            if (nAge != pWidget->GetAppearanceAge())
            {
                if (CFFL_FormFiller* pFormFiller = GetFormFiller(pWidget, FALSE))
                {
                    pFormFiller->ResetPDFWindow(pPageView, nValueAge == pWidget->GetValueAge());
                }

                bReset = TRUE;
            }
        }
    }
}

FX_BOOL CFFL_IFormFiller::OnLButtonDblClk(CPDFSDK_PageView* pPageView, CPDFSDK_Annot* pAnnot, FX_UINT nFlags, const CPDF_Point& point)
{
    ASSERT(pAnnot != NULL);
    ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");

    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
    {
        return pFormFiller->OnLButtonDblClk(pPageView, pAnnot, nFlags, point);
    }

    return FALSE;
}

FX_BOOL CFFL_IFormFiller::OnMouseMove(CPDFSDK_PageView* pPageView, CPDFSDK_Annot* pAnnot, FX_UINT nFlags, const CPDF_Point& point)
{
    ASSERT(pAnnot != NULL);
    ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");

    //change cursor
    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, TRUE))
    {
        return pFormFiller->OnMouseMove(pPageView, pAnnot, nFlags, point);
    }

    return FALSE;
}

FX_BOOL CFFL_IFormFiller::OnMouseWheel(CPDFSDK_PageView* pPageView, CPDFSDK_Annot* pAnnot, FX_UINT nFlags, short zDelta, const CPDF_Point& point)
{
    ASSERT(pAnnot != NULL);
    ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");

    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
    {
        return pFormFiller->OnMouseWheel(pPageView, pAnnot, nFlags, zDelta, point);
    }

    return FALSE;
}

FX_BOOL CFFL_IFormFiller::OnRButtonDown(CPDFSDK_PageView* pPageView, CPDFSDK_Annot* pAnnot, FX_UINT nFlags, const CPDF_Point& point)
{
    ASSERT(pAnnot != NULL);
    ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");

    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
    {
        return pFormFiller->OnRButtonDown(pPageView, pAnnot, nFlags, point);
    }

    return FALSE;
}

FX_BOOL CFFL_IFormFiller::OnRButtonUp(CPDFSDK_PageView* pPageView, CPDFSDK_Annot* pAnnot, FX_UINT nFlags, const CPDF_Point& point)
{
    ASSERT(pAnnot != NULL);
    ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");

    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
    {
        return pFormFiller->OnRButtonUp(pPageView, pAnnot, nFlags, point);
    }

    return FALSE;
}

FX_BOOL CFFL_IFormFiller::OnKeyDown(CPDFSDK_Annot* pAnnot, FX_UINT nKeyCode, FX_UINT nFlags)
{
    ASSERT(pAnnot != NULL);
    ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");

    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
    {
        return pFormFiller->OnKeyDown(pAnnot, nKeyCode, nFlags);
    }

    return FALSE;
}

FX_BOOL CFFL_IFormFiller::OnChar(CPDFSDK_Annot* pAnnot, FX_UINT nChar, FX_UINT nFlags)
{
    ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
    if (nChar == FWL_VKEY_Tab)
        return TRUE;

    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
        return pFormFiller->OnChar(pAnnot, nChar, nFlags);

    return FALSE;
}

FX_BOOL CFFL_IFormFiller::OnSetFocus(CPDFSDK_Annot* pAnnot,FX_UINT nFlag)
{
    if (!pAnnot)
        return FALSE;

    ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");

    if (!m_bNotifying)
    {
        CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
        if (pWidget->GetAAction(CPDF_AAction::GetFocus))
        {
            m_bNotifying = TRUE;
            pWidget->GetAppearanceAge();

            int nValueAge = pWidget->GetValueAge();
            pWidget->ClearAppModified();

            CPDFSDK_PageView* pPageView = pAnnot->GetPageView();
            ASSERT(pPageView != NULL);

            PDFSDK_FieldAction fa;
            fa.bModifier = m_pApp->FFI_IsCTRLKeyDown(nFlag);
            fa.bShift = m_pApp->FFI_IsSHIFTKeyDown(nFlag);

            CFFL_FormFiller* pFormFiller = GetFormFiller(pWidget, TRUE);
            if(!pFormFiller) return FALSE;
            pFormFiller->GetActionData(pPageView, CPDF_AAction::GetFocus, fa);
            pWidget->OnAAction(CPDF_AAction::GetFocus, fa, pPageView);
            m_bNotifying = FALSE;

            if (pWidget->IsAppModified())
            {
                if (CFFL_FormFiller* pFormFiller = GetFormFiller(pWidget, FALSE))
                {
                    pFormFiller->ResetPDFWindow(pPageView, nValueAge == pWidget->GetValueAge());
                }
            }
        }
    }

    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, TRUE))
        return pFormFiller->OnSetFocus(pAnnot, nFlag);

    return TRUE;
}

FX_BOOL CFFL_IFormFiller::OnKillFocus(CPDFSDK_Annot* pAnnot,FX_UINT nFlag)
{
    if(!pAnnot) return FALSE;
    ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");

    if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE))
    {
        if (pFormFiller->OnKillFocus(pAnnot, nFlag))
        {
            if (!m_bNotifying)
            {
                CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
                if (pWidget->GetAAction(CPDF_AAction::LoseFocus))
                {
                    m_bNotifying = TRUE;
                    pWidget->ClearAppModified();

                    CPDFSDK_PageView* pPageView = pWidget->GetPageView();
                    ASSERT(pPageView != NULL);

                    PDFSDK_FieldAction fa;
                    fa.bModifier = m_pApp->FFI_IsCTRLKeyDown(nFlag);
                    fa.bShift = m_pApp->FFI_IsSHIFTKeyDown(nFlag);

                    pFormFiller->GetActionData(pPageView, CPDF_AAction::LoseFocus, fa);

                    pWidget->OnAAction(CPDF_AAction::LoseFocus, fa, pPageView);
                    m_bNotifying = FALSE;

                }
            }
        }
        else
            return FALSE;
    }

    return TRUE;
}

FX_BOOL CFFL_IFormFiller::IsVisible(CPDFSDK_Widget* pWidget)
{
    return pWidget->IsVisible();
}

FX_BOOL CFFL_IFormFiller::IsReadOnly(CPDFSDK_Widget* pWidget)
{
    ASSERT(pWidget != NULL);

    int nFieldFlags = pWidget->GetFieldFlags();

    return (nFieldFlags & FIELDFLAG_READONLY) == FIELDFLAG_READONLY;
}

FX_BOOL CFFL_IFormFiller::IsFillingAllowed(CPDFSDK_Widget* pWidget)
{
    ASSERT(pWidget != NULL);

    if (pWidget->GetFieldType() == FIELDTYPE_PUSHBUTTON)
        return TRUE;
    else
    {
        CPDF_Page* pPage = pWidget->GetPDFPage();
        ASSERT(pPage != NULL);

        CPDF_Document* pDocument = pPage->m_pDocument;
        ASSERT(pDocument != NULL);

        FX_DWORD dwPermissions = pDocument->GetUserPermissions();
        return (dwPermissions&FPDFPERM_FILL_FORM) ||
                (dwPermissions&FPDFPERM_ANNOT_FORM) ||
            (dwPermissions&FPDFPERM_MODIFY);
    }
    return TRUE;
}

CFFL_FormFiller* CFFL_IFormFiller::GetFormFiller(CPDFSDK_Annot* pAnnot, FX_BOOL bRegister)
{
    auto it = m_Maps.find(pAnnot);
    if (it != m_Maps.end())
        return it->second;

    if (!bRegister)
        return nullptr;

    CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
    int nFieldType = pWidget->GetFieldType();
    CFFL_FormFiller* pFormFiller;
    switch (nFieldType) {
        case FIELDTYPE_PUSHBUTTON:
            pFormFiller = new CFFL_PushButton(m_pApp, pWidget);
            break;
        case FIELDTYPE_CHECKBOX:
            pFormFiller = new CFFL_CheckBox(m_pApp, pWidget);
            break;
      case FIELDTYPE_RADIOBUTTON:
            pFormFiller = new CFFL_RadioButton(m_pApp, pWidget);
            break;
      case FIELDTYPE_TEXTFIELD:
            pFormFiller = new CFFL_TextField(m_pApp, pWidget);
            break;
      case FIELDTYPE_LISTBOX:
            pFormFiller = new CFFL_ListBox(m_pApp, pWidget);
            break;
      case FIELDTYPE_COMBOBOX:
            pFormFiller = new CFFL_ComboBox(m_pApp, pWidget);
            break;
      case FIELDTYPE_UNKNOWN:
      default:
            pFormFiller = nullptr;
            break;
    }

    if (!pFormFiller)
        return nullptr;

    m_Maps[pAnnot] = pFormFiller;
    return pFormFiller;
}

void CFFL_IFormFiller::RemoveFormFiller(CPDFSDK_Annot* pAnnot)
{
    if ( pAnnot != NULL )
    {
        UnRegisterFormFiller( pAnnot );
    }
}

void CFFL_IFormFiller::UnRegisterFormFiller(CPDFSDK_Annot* pAnnot)
{
    auto it = m_Maps.find(pAnnot);
    if (it == m_Maps.end())
        return;

    delete it->second;
    m_Maps.erase(it);
}

void CFFL_IFormFiller::QueryWherePopup(void* pPrivateData, FX_FLOAT fPopupMin,FX_FLOAT fPopupMax, int32_t & nRet, FX_FLOAT & fPopupRet)
{
    ASSERT(pPrivateData != NULL);

    CFFL_PrivateData* pData = (CFFL_PrivateData*)pPrivateData;


    CPDF_Rect rcPageView(0,0,0,0);
    rcPageView.right = pData->pWidget->GetPDFPage()->GetPageWidth();
    rcPageView.bottom = pData->pWidget->GetPDFPage()->GetPageHeight();
    rcPageView.Normalize();


    ASSERT(pData->pWidget != NULL);
    CPDF_Rect rcAnnot = pData->pWidget->GetRect();

    FX_FLOAT fTop = 0.0f;
    FX_FLOAT fBottom = 0.0f;

    CPDFSDK_Widget * pWidget = (CPDFSDK_Widget*)pData->pWidget;
    switch (pWidget->GetRotate() / 90)
    {
    default:
    case 0:
        fTop = rcPageView.top - rcAnnot.top;
        fBottom = rcAnnot.bottom - rcPageView.bottom;
        break;
    case 1:
        fTop = rcAnnot.left - rcPageView.left;
        fBottom = rcPageView.right - rcAnnot.right;
        break;
    case 2:
        fTop = rcAnnot.bottom - rcPageView.bottom;
        fBottom = rcPageView.top - rcAnnot.top;
        break;
    case 3:
        fTop = rcPageView.right - rcAnnot.right;
        fBottom = rcAnnot.left - rcPageView.left;
        break;
    }

    FX_FLOAT fFactHeight = 0;
    FX_BOOL bBottom = TRUE;
    FX_FLOAT fMaxListBoxHeight = 0;
    if (fPopupMax > FFL_MAXLISTBOXHEIGHT)
    {
        if (fPopupMin > FFL_MAXLISTBOXHEIGHT)
        {
            fMaxListBoxHeight = fPopupMin;
        }
        else
        {
            fMaxListBoxHeight = FFL_MAXLISTBOXHEIGHT;
        }
    }
    else
        fMaxListBoxHeight = fPopupMax;

    if (fBottom > fMaxListBoxHeight)
    {
        fFactHeight = fMaxListBoxHeight;
        bBottom = TRUE;
    }
    else
    {
        if (fTop > fMaxListBoxHeight)
        {
            fFactHeight = fMaxListBoxHeight;
            bBottom = FALSE;
        }
        else
        {
            if (fTop > fBottom)
            {
                fFactHeight = fTop;
                bBottom = FALSE;
            }
            else
            {
                fFactHeight = fBottom;
                bBottom = TRUE;
            }
        }
    }

    nRet = bBottom ? 0 : 1;
    fPopupRet = fFactHeight;
}

void CFFL_IFormFiller::OnKeyStrokeCommit(CPDFSDK_Widget* pWidget, CPDFSDK_PageView* pPageView, FX_BOOL& bRC, FX_BOOL& bExit, FX_DWORD nFlag)
{
    if (!m_bNotifying)
    {
        ASSERT(pWidget != NULL);
        if (pWidget->GetAAction(CPDF_AAction::KeyStroke))
        {
            m_bNotifying = TRUE;
            pWidget->ClearAppModified();

            ASSERT(pPageView != NULL);

            PDFSDK_FieldAction fa;
            fa.bModifier = m_pApp->FFI_IsCTRLKeyDown(nFlag);
            fa.bShift = m_pApp->FFI_IsSHIFTKeyDown(nFlag);
            fa.bWillCommit = TRUE;
            fa.bKeyDown = TRUE;
            fa.bRC = TRUE;

            CFFL_FormFiller* pFormFiller = GetFormFiller(pWidget, FALSE);
            ASSERT(pFormFiller != NULL);

            pFormFiller->GetActionData(pPageView, CPDF_AAction::KeyStroke, fa);
            pFormFiller->SaveState(pPageView);

            PDFSDK_FieldAction faOld = fa;
            pWidget->OnAAction(CPDF_AAction::KeyStroke, fa, pPageView);

            bRC = fa.bRC;
//          bExit = !IsValidAnnot(m_pApp, pDocument, pDocView, pPageView, pWidget);

            m_bNotifying = FALSE;
        }
    }
}

void CFFL_IFormFiller::OnValidate(CPDFSDK_Widget* pWidget, CPDFSDK_PageView* pPageView, FX_BOOL& bRC, FX_BOOL& bExit, FX_DWORD nFlag)
{
    if (!m_bNotifying)
    {
        ASSERT(pWidget != NULL);
        if (pWidget->GetAAction(CPDF_AAction::Validate))
        {
            m_bNotifying = TRUE;
            pWidget->ClearAppModified();

            ASSERT(pPageView != NULL);
//          CReader_DocView* pDocView = pPageView->GetDocView();
//          ASSERT(pDocView != NULL);


            PDFSDK_FieldAction fa;
            fa.bModifier = m_pApp->FFI_IsCTRLKeyDown(nFlag);
            fa.bShift = m_pApp->FFI_IsSHIFTKeyDown(nFlag);
            fa.bKeyDown = TRUE;
            fa.bRC = TRUE;

            CFFL_FormFiller* pFormFiller = GetFormFiller(pWidget, FALSE);
            ASSERT(pFormFiller != NULL);

            pFormFiller->GetActionData(pPageView, CPDF_AAction::Validate, fa);
            pFormFiller->SaveState(pPageView);

            PDFSDK_FieldAction faOld = fa;
            pWidget->OnAAction(CPDF_AAction::Validate, fa, pPageView);

            bRC = fa.bRC;
//          bExit = !IsValidAnnot(m_pApp, pDocument, pDocView, pPageView, pWidget);

            m_bNotifying = FALSE;
        }
    }
}

void CFFL_IFormFiller::OnCalculate(CPDFSDK_Widget* pWidget, CPDFSDK_PageView* pPageView, FX_BOOL& bExit, FX_DWORD nFlag)
{
    if (!m_bNotifying)
    {
        ASSERT(pWidget != NULL);
        ASSERT(pPageView != NULL);
//      CReader_DocView* pDocView = pPageView->GetDocView();
//      ASSERT(pDocView != NULL);
        CPDFSDK_Document* pDocument = pPageView->GetSDKDocument();
        ASSERT(pDocument != NULL);

        CPDFSDK_InterForm* pInterForm = (CPDFSDK_InterForm*)pDocument->GetInterForm();
        ASSERT(pInterForm != NULL);

        pInterForm->OnCalculate(pWidget->GetFormField());

//      bExit = !IsValidAnnot(m_pApp, pDocument, pDocView, pPageView, pWidget);

        m_bNotifying = FALSE;
    }
}

void CFFL_IFormFiller::OnFormat(CPDFSDK_Widget* pWidget, CPDFSDK_PageView* pPageView, FX_BOOL& bExit, FX_DWORD nFlag)
{
    if (!m_bNotifying)
    {
        ASSERT(pWidget != NULL);
        ASSERT(pPageView != NULL);
//      CReader_DocView* pDocView = pPageView->GetDocView();
//      ASSERT(pDocView != NULL);
        CPDFSDK_Document* pDocument = pPageView->GetSDKDocument();
        ASSERT(pDocument != NULL);

        CPDFSDK_InterForm* pInterForm = (CPDFSDK_InterForm*)pDocument->GetInterForm();
        ASSERT(pInterForm != NULL);

        FX_BOOL bFormated = FALSE;
        CFX_WideString sValue = pInterForm->OnFormat(pWidget->GetFormField(), bFormated);

//      bExit = !IsValidAnnot(m_pApp, pDocument, pDocView, pPageView, pWidget);

        if (bExit) return;

        if (bFormated)
        {
            pInterForm->ResetFieldAppearance(pWidget->GetFormField(), sValue.c_str(), TRUE);
            pInterForm->UpdateField(pWidget->GetFormField());
        }

        m_bNotifying = FALSE;
    }
}

FX_BOOL CFFL_IFormFiller::IsValidAnnot(CPDFSDK_PageView* pPageView, CPDFSDK_Annot* pAnnot)
{

    ASSERT(pPageView != NULL);
    ASSERT(pAnnot != NULL);

    if(pPageView)
        return pPageView->IsValidAnnot(pAnnot->GetPDFAnnot());
    else
        return FALSE;
}

void CFFL_IFormFiller::OnBeforeKeyStroke(FX_BOOL bEditOrList, void* pPrivateData, int32_t nKeyCode,
                                              CFX_WideString & strChange, const CFX_WideString& strChangeEx,
                                              int nSelStart, int nSelEnd,
                                        FX_BOOL bKeyDown, FX_BOOL & bRC, FX_BOOL & bExit, FX_DWORD nFlag)
{
    ASSERT(pPrivateData != NULL);
    CFFL_PrivateData* pData = (CFFL_PrivateData*)pPrivateData;
    ASSERT(pData->pWidget != NULL);

    CFFL_FormFiller* pFormFiller = GetFormFiller(pData->pWidget, FALSE);
    ASSERT(pFormFiller != NULL);

    if (!m_bNotifying)
    {
        if (pData->pWidget->GetAAction(CPDF_AAction::KeyStroke))
        {
            m_bNotifying = TRUE;
            int nAge = pData->pWidget->GetAppearanceAge();
            int nValueAge = pData->pWidget->GetValueAge();

            ASSERT(pData->pPageView != NULL);
            CPDFSDK_Document* pDocument  = pData->pPageView->GetSDKDocument();

            PDFSDK_FieldAction fa;
            fa.bModifier = m_pApp->FFI_IsCTRLKeyDown(nFlag);
            fa.bShift = m_pApp->FFI_IsSHIFTKeyDown(nFlag);
            fa.sChange = strChange;
            fa.sChangeEx = strChangeEx;
            fa.bKeyDown = bKeyDown;
            fa.bWillCommit = FALSE;
            fa.bRC = TRUE;
            fa.nSelStart = nSelStart;
            fa.nSelEnd = nSelEnd;


            pFormFiller->GetActionData(pData->pPageView, CPDF_AAction::KeyStroke, fa);
            pFormFiller->SaveState(pData->pPageView);

            if (pData->pWidget->OnAAction(CPDF_AAction::KeyStroke, fa, pData->pPageView))
            {
                if (!IsValidAnnot(pData->pPageView, pData->pWidget))
                {
                    bExit = TRUE;
                    m_bNotifying = FALSE;
                    return;
                }

                if (nAge != pData->pWidget->GetAppearanceAge())
                {
                    CPWL_Wnd* pWnd = pFormFiller->ResetPDFWindow(pData->pPageView, nValueAge == pData->pWidget->GetValueAge());
                    pData = (CFFL_PrivateData*)pWnd->GetAttachedData();
                    bExit = TRUE;
                }

                if (fa.bRC)
                {
                    pFormFiller->SetActionData(pData->pPageView, CPDF_AAction::KeyStroke, fa);
                    bRC = FALSE;
                }
                else
                {
                    pFormFiller->RestoreState(pData->pPageView);
                    bRC = FALSE;
                }

                if (pDocument->GetFocusAnnot() != pData->pWidget)
                {
                    pFormFiller->CommitData(pData->pPageView,nFlag);
                    bExit = TRUE;
                }
            }
            else
            {
                if (!IsValidAnnot(pData->pPageView, pData->pWidget))
                {
                    bExit = TRUE;
                    m_bNotifying = FALSE;
                    return;
                }
            }

            m_bNotifying = FALSE;
        }
    }
}

void    CFFL_IFormFiller::OnAfterKeyStroke(FX_BOOL bEditOrList, void* pPrivateData, FX_BOOL & bExit,FX_DWORD nFlag)
{
    ASSERT(pPrivateData != NULL);
    CFFL_PrivateData* pData = (CFFL_PrivateData*)pPrivateData;
    ASSERT(pData->pWidget != NULL);

    CFFL_FormFiller* pFormFiller = GetFormFiller(pData->pWidget, FALSE);
    ASSERT(pFormFiller != NULL);

    if (!bEditOrList)
        pFormFiller->OnKeyStroke(bExit);
}