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      1 // Copyright 2016 PDFium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
      6 
      7 #include "fpdfsdk/cpdfsdk_pageview.h"
      8 
      9 #include <memory>
     10 #include <vector>
     11 
     12 #include "core/fpdfapi/parser/cpdf_document.h"
     13 #include "core/fpdfapi/render/cpdf_renderoptions.h"
     14 #include "core/fpdfdoc/cpdf_annotlist.h"
     15 #include "core/fpdfdoc/cpdf_interform.h"
     16 #include "core/fxcrt/autorestorer.h"
     17 #include "fpdfsdk/cpdfsdk_annot.h"
     18 #include "fpdfsdk/cpdfsdk_annotiteration.h"
     19 #include "fpdfsdk/cpdfsdk_formfillenvironment.h"
     20 #include "fpdfsdk/cpdfsdk_interform.h"
     21 #include "third_party/base/ptr_util.h"
     22 
     23 #ifdef PDF_ENABLE_XFA
     24 #include "fpdfsdk/fpdfxfa/cpdfxfa_page.h"
     25 #include "xfa/fxfa/cxfa_ffdocview.h"
     26 #include "xfa/fxfa/cxfa_ffpageview.h"
     27 #include "xfa/fxfa/cxfa_ffwidgethandler.h"
     28 #include "xfa/fxfa/cxfa_rendercontext.h"
     29 #include "xfa/fxgraphics/cxfa_graphics.h"
     30 #endif  // PDF_ENABLE_XFA
     31 
     32 CPDFSDK_PageView::CPDFSDK_PageView(CPDFSDK_FormFillEnvironment* pFormFillEnv,
     33                                    UnderlyingPageType* page)
     34     : m_page(page),
     35       m_pFormFillEnv(pFormFillEnv),
     36 #ifndef PDF_ENABLE_XFA
     37       m_bOwnsPage(false),
     38 #endif  // PDF_ENABLE_XFA
     39       m_bOnWidget(false),
     40       m_bValid(false),
     41       m_bLocked(false),
     42       m_bBeingDestroyed(false) {
     43   CPDFSDK_InterForm* pInterForm = pFormFillEnv->GetInterForm();
     44   CPDF_InterForm* pPDFInterForm = pInterForm->GetInterForm();
     45 #ifdef PDF_ENABLE_XFA
     46   if (page->GetPDFPage())
     47     pPDFInterForm->FixPageFields(page->GetPDFPage());
     48 #else   // PDF_ENABLE_XFA
     49   pPDFInterForm->FixPageFields(page);
     50   m_page->SetView(this);
     51 #endif  // PDF_ENABLE_XFA
     52 }
     53 
     54 CPDFSDK_PageView::~CPDFSDK_PageView() {
     55 #ifndef PDF_ENABLE_XFA
     56   // The call to |ReleaseAnnot| can cause the page pointed to by |m_page| to
     57   // be freed, which will cause issues if we try to cleanup the pageview pointer
     58   // in |m_page|. So, reset the pageview pointer before doing anything else.
     59   m_page->SetView(nullptr);
     60 #endif  // PDF_ENABLE_XFA
     61 
     62   CPDFSDK_AnnotHandlerMgr* pAnnotHandlerMgr =
     63       m_pFormFillEnv->GetAnnotHandlerMgr();
     64   for (CPDFSDK_Annot* pAnnot : m_SDKAnnotArray)
     65     pAnnotHandlerMgr->ReleaseAnnot(pAnnot);
     66 
     67   m_SDKAnnotArray.clear();
     68   m_pAnnotList.reset();
     69 
     70 #ifndef PDF_ENABLE_XFA
     71   if (m_bOwnsPage)
     72     delete m_page;
     73 #endif  // PDF_ENABLE_XFA
     74 }
     75 
     76 void CPDFSDK_PageView::PageView_OnDraw(CFX_RenderDevice* pDevice,
     77                                        CFX_Matrix* pUser2Device,
     78 #ifdef PDF_ENABLE_XFA
     79                                        CPDF_RenderOptions* pOptions,
     80                                        const FX_RECT& pClip) {
     81 #else
     82                                        CPDF_RenderOptions* pOptions) {
     83 #endif  // PDF_ENABLE_XFA
     84   m_curMatrix = *pUser2Device;
     85 
     86 #ifdef PDF_ENABLE_XFA
     87   CPDFXFA_Page* pPage = GetPDFXFAPage();
     88   if (!pPage)
     89     return;
     90 
     91   if (pPage->GetContext()->GetFormType() == FormType::kXFAFull) {
     92     CFX_RectF rectClip(
     93         static_cast<float>(pClip.left), static_cast<float>(pClip.top),
     94         static_cast<float>(pClip.Width()), static_cast<float>(pClip.Height()));
     95 
     96     CXFA_Graphics gs(pDevice);
     97     gs.SetClipRect(rectClip);
     98 
     99     CXFA_FFPageView* xfaView = pPage->GetXFAPageView();
    100     CXFA_RenderContext renderContext(xfaView, rectClip, *pUser2Device);
    101     renderContext.DoRender(&gs);
    102 
    103     CXFA_FFDocView* docView = xfaView->GetDocView();
    104     if (!docView)
    105       return;
    106     CPDFSDK_Annot* annot = GetFocusAnnot();
    107     if (!annot)
    108       return;
    109     // Render the focus widget
    110     docView->GetWidgetHandler()->RenderWidget(annot->GetXFAWidget(), &gs,
    111                                               *pUser2Device, false);
    112     return;
    113   }
    114 #endif  // PDF_ENABLE_XFA
    115 
    116   // for pdf/static xfa.
    117   CPDFSDK_AnnotIteration annotIteration(this, true);
    118   for (const auto& pSDKAnnot : annotIteration) {
    119     m_pFormFillEnv->GetAnnotHandlerMgr()->Annot_OnDraw(
    120         this, pSDKAnnot.Get(), pDevice, pUser2Device,
    121         pOptions->GetDrawAnnots());
    122   }
    123 }
    124 
    125 CPDFSDK_Annot* CPDFSDK_PageView::GetFXAnnotAtPoint(const CFX_PointF& point) {
    126   CPDFSDK_AnnotHandlerMgr* pAnnotMgr = m_pFormFillEnv->GetAnnotHandlerMgr();
    127   CPDFSDK_AnnotIteration annotIteration(this, false);
    128   for (const auto& pSDKAnnot : annotIteration) {
    129     CFX_FloatRect rc = pAnnotMgr->Annot_OnGetViewBBox(this, pSDKAnnot.Get());
    130     if (pSDKAnnot->GetAnnotSubtype() == CPDF_Annot::Subtype::POPUP)
    131       continue;
    132     if (rc.Contains(point))
    133       return pSDKAnnot.Get();
    134   }
    135   return nullptr;
    136 }
    137 
    138 CPDFSDK_Annot* CPDFSDK_PageView::GetFXWidgetAtPoint(const CFX_PointF& point) {
    139   CPDFSDK_AnnotHandlerMgr* pAnnotMgr = m_pFormFillEnv->GetAnnotHandlerMgr();
    140   CPDFSDK_AnnotIteration annotIteration(this, false);
    141   for (const auto& pSDKAnnot : annotIteration) {
    142     bool bHitTest = pSDKAnnot->GetAnnotSubtype() == CPDF_Annot::Subtype::WIDGET;
    143 #ifdef PDF_ENABLE_XFA
    144     bHitTest = bHitTest ||
    145                pSDKAnnot->GetAnnotSubtype() == CPDF_Annot::Subtype::XFAWIDGET;
    146 #endif  // PDF_ENABLE_XFA
    147     if (bHitTest) {
    148       pAnnotMgr->Annot_OnGetViewBBox(this, pSDKAnnot.Get());
    149       if (pAnnotMgr->Annot_OnHitTest(this, pSDKAnnot.Get(), point))
    150         return pSDKAnnot.Get();
    151     }
    152   }
    153   return nullptr;
    154 }
    155 
    156 #ifdef PDF_ENABLE_XFA
    157 CPDFSDK_Annot* CPDFSDK_PageView::AddAnnot(CXFA_FFWidget* pPDFAnnot) {
    158   if (!pPDFAnnot)
    159     return nullptr;
    160 
    161   CPDFSDK_Annot* pSDKAnnot = GetAnnotByXFAWidget(pPDFAnnot);
    162   if (pSDKAnnot)
    163     return pSDKAnnot;
    164 
    165   CPDFSDK_AnnotHandlerMgr* pAnnotHandler = m_pFormFillEnv->GetAnnotHandlerMgr();
    166   pSDKAnnot = pAnnotHandler->NewAnnot(pPDFAnnot, this);
    167   if (!pSDKAnnot)
    168     return nullptr;
    169 
    170   m_SDKAnnotArray.push_back(pSDKAnnot);
    171   return pSDKAnnot;
    172 }
    173 
    174 bool CPDFSDK_PageView::DeleteAnnot(CPDFSDK_Annot* pAnnot) {
    175   if (!pAnnot)
    176     return false;
    177 
    178   CPDFXFA_Page* pPage = pAnnot->GetPDFXFAPage();
    179   if (!pPage || !pPage->GetContext()->ContainsXFAForm())
    180     return false;
    181 
    182   CPDFSDK_Annot::ObservedPtr pObserved(pAnnot);
    183   if (GetFocusAnnot() == pAnnot)
    184     m_pFormFillEnv->KillFocusAnnot(0);  // May invoke JS, invalidating pAnnot.
    185 
    186   if (pObserved) {
    187     CPDFSDK_AnnotHandlerMgr* pAnnotHandler =
    188         m_pFormFillEnv->GetAnnotHandlerMgr();
    189     if (pAnnotHandler)
    190       pAnnotHandler->ReleaseAnnot(pObserved.Get());
    191   }
    192 
    193   auto it = std::find(m_SDKAnnotArray.begin(), m_SDKAnnotArray.end(), pAnnot);
    194   if (it != m_SDKAnnotArray.end())
    195     m_SDKAnnotArray.erase(it);
    196   if (m_pCaptureWidget.Get() == pAnnot)
    197     m_pCaptureWidget.Reset();
    198 
    199   return true;
    200 }
    201 #endif  // PDF_ENABLE_XFA
    202 
    203 CPDF_Document* CPDFSDK_PageView::GetPDFDocument() {
    204   if (m_page) {
    205 #ifdef PDF_ENABLE_XFA
    206     return m_page->GetContext()->GetPDFDoc();
    207 #else   // PDF_ENABLE_XFA
    208     return m_page->m_pDocument.Get();
    209 #endif  // PDF_ENABLE_XFA
    210   }
    211   return nullptr;
    212 }
    213 
    214 CPDF_Page* CPDFSDK_PageView::GetPDFPage() const {
    215 #ifdef PDF_ENABLE_XFA
    216   return m_page ? m_page->GetPDFPage() : nullptr;
    217 #else   // PDF_ENABLE_XFA
    218   return m_page;
    219 #endif  // PDF_ENABLE_XFA
    220 }
    221 
    222 CPDFSDK_Annot* CPDFSDK_PageView::GetAnnotByDict(CPDF_Dictionary* pDict) {
    223   for (CPDFSDK_Annot* pAnnot : m_SDKAnnotArray) {
    224     if (pAnnot->GetPDFAnnot()->GetAnnotDict() == pDict)
    225       return pAnnot;
    226   }
    227   return nullptr;
    228 }
    229 
    230 #ifdef PDF_ENABLE_XFA
    231 CPDFSDK_Annot* CPDFSDK_PageView::GetAnnotByXFAWidget(CXFA_FFWidget* hWidget) {
    232   if (!hWidget)
    233     return nullptr;
    234 
    235   for (CPDFSDK_Annot* pAnnot : m_SDKAnnotArray) {
    236     if (pAnnot->GetXFAWidget() == hWidget)
    237       return pAnnot;
    238   }
    239   return nullptr;
    240 }
    241 #endif  // PDF_ENABLE_XFA
    242 
    243 WideString CPDFSDK_PageView::GetSelectedText() {
    244   if (CPDFSDK_Annot* pAnnot = GetFocusAnnot()) {
    245     CPDFSDK_AnnotHandlerMgr* pAnnotHandlerMgr =
    246         m_pFormFillEnv->GetAnnotHandlerMgr();
    247     return pAnnotHandlerMgr->Annot_GetSelectedText(pAnnot);
    248   }
    249 
    250   return WideString();
    251 }
    252 
    253 void CPDFSDK_PageView::ReplaceSelection(const WideString& text) {
    254   if (CPDFSDK_Annot* pAnnot = GetFocusAnnot()) {
    255     CPDFSDK_AnnotHandlerMgr* pAnnotHandlerMgr =
    256         m_pFormFillEnv->GetAnnotHandlerMgr();
    257     pAnnotHandlerMgr->Annot_ReplaceSelection(pAnnot, text);
    258   }
    259 }
    260 
    261 bool CPDFSDK_PageView::OnFocus(const CFX_PointF& point, uint32_t nFlag) {
    262   CPDFSDK_Annot::ObservedPtr pAnnot(GetFXWidgetAtPoint(point));
    263   if (!pAnnot) {
    264     m_pFormFillEnv->KillFocusAnnot(nFlag);
    265     return false;
    266   }
    267 
    268   m_pFormFillEnv->SetFocusAnnot(&pAnnot);
    269   return true;
    270 }
    271 
    272 bool CPDFSDK_PageView::OnLButtonDown(const CFX_PointF& point, uint32_t nFlag) {
    273   CPDFSDK_Annot::ObservedPtr pAnnot(GetFXWidgetAtPoint(point));
    274   if (!pAnnot) {
    275     m_pFormFillEnv->KillFocusAnnot(nFlag);
    276     return false;
    277   }
    278 
    279   CPDFSDK_AnnotHandlerMgr* pAnnotHandlerMgr =
    280       m_pFormFillEnv->GetAnnotHandlerMgr();
    281   if (!pAnnotHandlerMgr->Annot_OnLButtonDown(this, &pAnnot, nFlag, point))
    282     return false;
    283 
    284   if (!pAnnot)
    285     return false;
    286 
    287   m_pFormFillEnv->SetFocusAnnot(&pAnnot);
    288   return true;
    289 }
    290 
    291 #ifdef PDF_ENABLE_XFA
    292 bool CPDFSDK_PageView::OnRButtonDown(const CFX_PointF& point, uint32_t nFlag) {
    293   CPDFSDK_Annot::ObservedPtr pAnnot(GetFXWidgetAtPoint(point));
    294   if (!pAnnot)
    295     return false;
    296 
    297   CPDFSDK_AnnotHandlerMgr* pAnnotHandlerMgr =
    298       m_pFormFillEnv->GetAnnotHandlerMgr();
    299   bool ok = pAnnotHandlerMgr->Annot_OnRButtonDown(this, &pAnnot, nFlag, point);
    300   if (!pAnnot)
    301     return false;
    302 
    303   if (ok)
    304     m_pFormFillEnv->SetFocusAnnot(&pAnnot);
    305 
    306   return true;
    307 }
    308 
    309 bool CPDFSDK_PageView::OnRButtonUp(const CFX_PointF& point, uint32_t nFlag) {
    310   CPDFSDK_AnnotHandlerMgr* pAnnotHandlerMgr =
    311       m_pFormFillEnv->GetAnnotHandlerMgr();
    312   CPDFSDK_Annot::ObservedPtr pFXAnnot(GetFXWidgetAtPoint(point));
    313   if (!pFXAnnot)
    314     return false;
    315 
    316   if (pAnnotHandlerMgr->Annot_OnRButtonUp(this, &pFXAnnot, nFlag, point))
    317     m_pFormFillEnv->SetFocusAnnot(&pFXAnnot);
    318 
    319   return true;
    320 }
    321 #endif  // PDF_ENABLE_XFA
    322 
    323 bool CPDFSDK_PageView::OnLButtonUp(const CFX_PointF& point, uint32_t nFlag) {
    324   CPDFSDK_AnnotHandlerMgr* pAnnotHandlerMgr =
    325       m_pFormFillEnv->GetAnnotHandlerMgr();
    326   CPDFSDK_Annot::ObservedPtr pFXAnnot(GetFXWidgetAtPoint(point));
    327   CPDFSDK_Annot::ObservedPtr pFocusAnnot(GetFocusAnnot());
    328   if (pFocusAnnot && pFocusAnnot != pFXAnnot) {
    329     // Last focus Annot gets a chance to handle the event.
    330     if (pAnnotHandlerMgr->Annot_OnLButtonUp(this, &pFocusAnnot, nFlag, point))
    331       return true;
    332   }
    333   return pFXAnnot &&
    334          pAnnotHandlerMgr->Annot_OnLButtonUp(this, &pFXAnnot, nFlag, point);
    335 }
    336 
    337 bool CPDFSDK_PageView::OnMouseMove(const CFX_PointF& point, int nFlag) {
    338   CPDFSDK_AnnotHandlerMgr* pAnnotHandlerMgr =
    339       m_pFormFillEnv->GetAnnotHandlerMgr();
    340   CPDFSDK_Annot::ObservedPtr pFXAnnot(GetFXAnnotAtPoint(point));
    341 
    342   if (m_bOnWidget && m_pCaptureWidget != pFXAnnot)
    343     ExitWidget(pAnnotHandlerMgr, true, nFlag);
    344 
    345   if (pFXAnnot) {
    346     if (!m_bOnWidget) {
    347       EnterWidget(pAnnotHandlerMgr, &pFXAnnot, nFlag);
    348 
    349       // Annot_OnMouseEnter may have invalidated pFXAnnot.
    350       if (!pFXAnnot) {
    351         ExitWidget(pAnnotHandlerMgr, false, nFlag);
    352         return true;
    353       }
    354     }
    355 
    356     pAnnotHandlerMgr->Annot_OnMouseMove(this, &pFXAnnot, nFlag, point);
    357     return true;
    358   }
    359 
    360   return false;
    361 }
    362 
    363 void CPDFSDK_PageView::EnterWidget(CPDFSDK_AnnotHandlerMgr* pAnnotHandlerMgr,
    364                                    CPDFSDK_Annot::ObservedPtr* pAnnot,
    365                                    uint32_t nFlag) {
    366   m_bOnWidget = true;
    367   m_pCaptureWidget.Reset(pAnnot->Get());
    368   pAnnotHandlerMgr->Annot_OnMouseEnter(this, pAnnot, nFlag);
    369 }
    370 
    371 void CPDFSDK_PageView::ExitWidget(CPDFSDK_AnnotHandlerMgr* pAnnotHandlerMgr,
    372                                   bool callExitCallback,
    373                                   uint32_t nFlag) {
    374   m_bOnWidget = false;
    375   if (m_pCaptureWidget) {
    376     if (callExitCallback)
    377       pAnnotHandlerMgr->Annot_OnMouseExit(this, &m_pCaptureWidget, nFlag);
    378 
    379     m_pCaptureWidget.Reset();
    380   }
    381 }
    382 
    383 bool CPDFSDK_PageView::OnMouseWheel(double deltaX,
    384                                     double deltaY,
    385                                     const CFX_PointF& point,
    386                                     int nFlag) {
    387   CPDFSDK_Annot::ObservedPtr pAnnot(GetFXWidgetAtPoint(point));
    388   if (!pAnnot)
    389     return false;
    390 
    391   CPDFSDK_AnnotHandlerMgr* pAnnotHandlerMgr =
    392       m_pFormFillEnv->GetAnnotHandlerMgr();
    393   return pAnnotHandlerMgr->Annot_OnMouseWheel(this, &pAnnot, nFlag,
    394                                               static_cast<int>(deltaY), point);
    395 }
    396 
    397 bool CPDFSDK_PageView::OnChar(int nChar, uint32_t nFlag) {
    398   if (CPDFSDK_Annot* pAnnot = GetFocusAnnot()) {
    399     CPDFSDK_AnnotHandlerMgr* pAnnotHandlerMgr =
    400         m_pFormFillEnv->GetAnnotHandlerMgr();
    401     return pAnnotHandlerMgr->Annot_OnChar(pAnnot, nChar, nFlag);
    402   }
    403 
    404   return false;
    405 }
    406 
    407 bool CPDFSDK_PageView::OnKeyDown(int nKeyCode, int nFlag) {
    408   if (CPDFSDK_Annot* pAnnot = GetFocusAnnot()) {
    409     CPDFSDK_AnnotHandlerMgr* pAnnotHandlerMgr =
    410         m_pFormFillEnv->GetAnnotHandlerMgr();
    411     return pAnnotHandlerMgr->Annot_OnKeyDown(pAnnot, nKeyCode, nFlag);
    412   }
    413   return false;
    414 }
    415 
    416 bool CPDFSDK_PageView::OnKeyUp(int nKeyCode, int nFlag) {
    417   return false;
    418 }
    419 
    420 void CPDFSDK_PageView::LoadFXAnnots() {
    421   CPDFSDK_AnnotHandlerMgr* pAnnotHandlerMgr =
    422       m_pFormFillEnv->GetAnnotHandlerMgr();
    423 
    424   AutoRestorer<bool> lock(&m_bLocked);
    425   m_bLocked = true;
    426 
    427 #ifdef PDF_ENABLE_XFA
    428   RetainPtr<CPDFXFA_Page> protector(m_page);
    429   if (m_pFormFillEnv->GetXFAContext()->GetFormType() == FormType::kXFAFull) {
    430     CXFA_FFPageView* pageView = m_page->GetXFAPageView();
    431     std::unique_ptr<IXFA_WidgetIterator> pWidgetHandler(
    432         pageView->CreateWidgetIterator(
    433             XFA_TRAVERSEWAY_Form,
    434             XFA_WidgetStatus_Visible | XFA_WidgetStatus_Viewable));
    435     if (!pWidgetHandler) {
    436       return;
    437     }
    438 
    439     while (CXFA_FFWidget* pXFAAnnot = pWidgetHandler->MoveToNext()) {
    440       CPDFSDK_Annot* pAnnot = pAnnotHandlerMgr->NewAnnot(pXFAAnnot, this);
    441       if (!pAnnot)
    442         continue;
    443       m_SDKAnnotArray.push_back(pAnnot);
    444       pAnnotHandlerMgr->Annot_OnLoad(pAnnot);
    445     }
    446 
    447     return;
    448   }
    449 #endif  // PDF_ENABLE_XFA
    450 
    451   CPDF_Page* pPage = GetPDFPage();
    452   ASSERT(pPage);
    453   bool bUpdateAP = CPDF_InterForm::IsUpdateAPEnabled();
    454   // Disable the default AP construction.
    455   CPDF_InterForm::SetUpdateAP(false);
    456   m_pAnnotList = pdfium::MakeUnique<CPDF_AnnotList>(pPage);
    457   CPDF_InterForm::SetUpdateAP(bUpdateAP);
    458 
    459   const size_t nCount = m_pAnnotList->Count();
    460   for (size_t i = 0; i < nCount; ++i) {
    461     CPDF_Annot* pPDFAnnot = m_pAnnotList->GetAt(i);
    462     CheckUnSupportAnnot(GetPDFDocument(), pPDFAnnot);
    463     CPDFSDK_Annot* pAnnot = pAnnotHandlerMgr->NewAnnot(pPDFAnnot, this);
    464     if (!pAnnot)
    465       continue;
    466     m_SDKAnnotArray.push_back(pAnnot);
    467     pAnnotHandlerMgr->Annot_OnLoad(pAnnot);
    468   }
    469 }
    470 
    471 void CPDFSDK_PageView::UpdateRects(const std::vector<CFX_FloatRect>& rects) {
    472   for (const auto& rc : rects)
    473     m_pFormFillEnv->Invalidate(m_page, rc.GetOuterRect());
    474 }
    475 
    476 void CPDFSDK_PageView::UpdateView(CPDFSDK_Annot* pAnnot) {
    477   CFX_FloatRect rcWindow = pAnnot->GetRect();
    478   m_pFormFillEnv->Invalidate(m_page, rcWindow.GetOuterRect());
    479 }
    480 
    481 int CPDFSDK_PageView::GetPageIndex() const {
    482   if (!m_page)
    483     return -1;
    484 
    485 #ifdef PDF_ENABLE_XFA
    486   switch (m_page->GetContext()->GetFormType()) {
    487     case FormType::kXFAFull: {
    488       CXFA_FFPageView* pPageView = m_page->GetXFAPageView();
    489       return pPageView ? pPageView->GetPageIndex() : -1;
    490     }
    491     case FormType::kNone:
    492     case FormType::kAcroForm:
    493     case FormType::kXFAForeground:
    494       break;
    495   }
    496 #endif  // PDF_ENABLE_XFA
    497   return GetPageIndexForStaticPDF();
    498 }
    499 
    500 bool CPDFSDK_PageView::IsValidAnnot(const CPDF_Annot* p) const {
    501   if (!p)
    502     return false;
    503 
    504   const auto& annots = m_pAnnotList->All();
    505   auto it = std::find_if(annots.begin(), annots.end(),
    506                          [p](const std::unique_ptr<CPDF_Annot>& annot) {
    507                            return annot.get() == p;
    508                          });
    509   return it != annots.end();
    510 }
    511 
    512 bool CPDFSDK_PageView::IsValidSDKAnnot(const CPDFSDK_Annot* p) const {
    513   if (!p)
    514     return false;
    515   return pdfium::ContainsValue(m_SDKAnnotArray, p);
    516 }
    517 
    518 CPDFSDK_Annot* CPDFSDK_PageView::GetFocusAnnot() {
    519   CPDFSDK_Annot* pFocusAnnot = m_pFormFillEnv->GetFocusAnnot();
    520   return IsValidSDKAnnot(pFocusAnnot) ? pFocusAnnot : nullptr;
    521 }
    522 
    523 int CPDFSDK_PageView::GetPageIndexForStaticPDF() const {
    524   CPDF_Dictionary* pDict = GetPDFPage()->m_pFormDict.Get();
    525   CPDF_Document* pDoc = m_pFormFillEnv->GetPDFDocument();
    526   return (pDoc && pDict) ? pDoc->GetPageIndex(pDict->GetObjNum()) : -1;
    527 }
    528