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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_formfillenvironment.h"
      8 
      9 #include <memory>
     10 #include <utility>
     11 
     12 #include "core/fpdfapi/parser/cpdf_array.h"
     13 #include "core/fpdfdoc/cpdf_docjsactions.h"
     14 #include "fpdfsdk/cpdfsdk_annothandlermgr.h"
     15 #include "fpdfsdk/cpdfsdk_interform.h"
     16 #include "fpdfsdk/cpdfsdk_pageview.h"
     17 #include "fpdfsdk/cpdfsdk_widget.h"
     18 #include "fpdfsdk/formfiller/cffl_interactiveformfiller.h"
     19 #include "fpdfsdk/fsdk_actionhandler.h"
     20 #include "fxjs/ijs_runtime.h"
     21 #include "third_party/base/ptr_util.h"
     22 
     23 namespace {
     24 
     25 // NOTE: |bsUTF16LE| must outlive the use of the result. Care must be taken
     26 // since modifying the result would impact |bsUTF16LE|.
     27 FPDF_WIDESTRING AsFPDFWideString(ByteString* bsUTF16LE) {
     28   return reinterpret_cast<FPDF_WIDESTRING>(
     29       bsUTF16LE->GetBuffer(bsUTF16LE->GetLength()));
     30 }
     31 
     32 }  // namespace
     33 
     34 CPDFSDK_FormFillEnvironment::CPDFSDK_FormFillEnvironment(
     35     UnderlyingDocumentType* pDoc,
     36     FPDF_FORMFILLINFO* pFFinfo)
     37     : m_pInfo(pFFinfo),
     38       m_pUnderlyingDoc(pDoc),
     39       m_pSysHandler(pdfium::MakeUnique<CFX_SystemHandler>(this)),
     40       m_bChangeMask(false),
     41       m_bBeingDestroyed(false) {}
     42 
     43 CPDFSDK_FormFillEnvironment::~CPDFSDK_FormFillEnvironment() {
     44   m_bBeingDestroyed = true;
     45   ClearAllFocusedAnnots();
     46 
     47   // |m_PageMap| will try to access |m_pInterForm| when it cleans itself up.
     48   // Make sure it is deleted before |m_pInterForm|.
     49   m_PageMap.clear();
     50 
     51   // |m_pAnnotHandlerMgr| will try to access |m_pFormFiller| when it cleans
     52   // itself up. Make sure it is deleted before |m_pFormFiller|.
     53   m_pAnnotHandlerMgr.reset();
     54 
     55   // Must destroy the |m_pFormFiller| before the environment (|this|)
     56   // because any created form widgets hold a pointer to the environment.
     57   // Those widgets may call things like KillTimer() as they are shutdown.
     58   m_pFormFiller.reset();
     59 
     60   if (m_pInfo && m_pInfo->Release)
     61     m_pInfo->Release(m_pInfo);
     62 }
     63 
     64 int CPDFSDK_FormFillEnvironment::JS_appAlert(const wchar_t* Msg,
     65                                              const wchar_t* Title,
     66                                              uint32_t Type,
     67                                              uint32_t Icon) {
     68   if (!m_pInfo || !m_pInfo->m_pJsPlatform ||
     69       !m_pInfo->m_pJsPlatform->app_alert) {
     70     return -1;
     71   }
     72   ByteString bsMsg = WideString(Msg).UTF16LE_Encode();
     73   ByteString bsTitle = WideString(Title).UTF16LE_Encode();
     74   return m_pInfo->m_pJsPlatform->app_alert(
     75       m_pInfo->m_pJsPlatform, AsFPDFWideString(&bsMsg),
     76       AsFPDFWideString(&bsTitle), Type, Icon);
     77 }
     78 
     79 int CPDFSDK_FormFillEnvironment::JS_appResponse(const wchar_t* Question,
     80                                                 const wchar_t* Title,
     81                                                 const wchar_t* Default,
     82                                                 const wchar_t* cLabel,
     83                                                 FPDF_BOOL bPassword,
     84                                                 void* response,
     85                                                 int length) {
     86   if (!m_pInfo || !m_pInfo->m_pJsPlatform ||
     87       !m_pInfo->m_pJsPlatform->app_response) {
     88     return -1;
     89   }
     90   ByteString bsQuestion = WideString(Question).UTF16LE_Encode();
     91   ByteString bsTitle = WideString(Title).UTF16LE_Encode();
     92   ByteString bsDefault = WideString(Default).UTF16LE_Encode();
     93   ByteString bsLabel = WideString(cLabel).UTF16LE_Encode();
     94   return m_pInfo->m_pJsPlatform->app_response(
     95       m_pInfo->m_pJsPlatform, AsFPDFWideString(&bsQuestion),
     96       AsFPDFWideString(&bsTitle), AsFPDFWideString(&bsDefault),
     97       AsFPDFWideString(&bsLabel), bPassword, response, length);
     98 }
     99 
    100 void CPDFSDK_FormFillEnvironment::JS_appBeep(int nType) {
    101   if (!m_pInfo || !m_pInfo->m_pJsPlatform ||
    102       !m_pInfo->m_pJsPlatform->app_beep) {
    103     return;
    104   }
    105   m_pInfo->m_pJsPlatform->app_beep(m_pInfo->m_pJsPlatform, nType);
    106 }
    107 
    108 WideString CPDFSDK_FormFillEnvironment::JS_fieldBrowse() {
    109   if (!m_pInfo || !m_pInfo->m_pJsPlatform ||
    110       !m_pInfo->m_pJsPlatform->Field_browse) {
    111     return WideString();
    112   }
    113   const int nRequiredLen =
    114       m_pInfo->m_pJsPlatform->Field_browse(m_pInfo->m_pJsPlatform, nullptr, 0);
    115   if (nRequiredLen <= 0)
    116     return WideString();
    117 
    118   std::vector<uint8_t> pBuff(nRequiredLen);
    119   const int nActualLen = m_pInfo->m_pJsPlatform->Field_browse(
    120       m_pInfo->m_pJsPlatform, pBuff.data(), nRequiredLen);
    121   if (nActualLen <= 0 || nActualLen > nRequiredLen)
    122     return WideString();
    123 
    124   pBuff.resize(nActualLen);
    125   return WideString::FromLocal(ByteStringView(pBuff));
    126 }
    127 
    128 WideString CPDFSDK_FormFillEnvironment::JS_docGetFilePath() {
    129   if (!m_pInfo || !m_pInfo->m_pJsPlatform ||
    130       !m_pInfo->m_pJsPlatform->Doc_getFilePath) {
    131     return WideString();
    132   }
    133   const int nRequiredLen = m_pInfo->m_pJsPlatform->Doc_getFilePath(
    134       m_pInfo->m_pJsPlatform, nullptr, 0);
    135   if (nRequiredLen <= 0)
    136     return WideString();
    137 
    138   std::vector<uint8_t> pBuff(nRequiredLen);
    139   const int nActualLen = m_pInfo->m_pJsPlatform->Doc_getFilePath(
    140       m_pInfo->m_pJsPlatform, pBuff.data(), nRequiredLen);
    141   if (nActualLen <= 0 || nActualLen > nRequiredLen)
    142     return WideString();
    143 
    144   pBuff.resize(nActualLen);
    145   return WideString::FromLocal(ByteStringView(pBuff));
    146 }
    147 
    148 void CPDFSDK_FormFillEnvironment::JS_docSubmitForm(void* formData,
    149                                                    int length,
    150                                                    const wchar_t* URL) {
    151   if (!m_pInfo || !m_pInfo->m_pJsPlatform ||
    152       !m_pInfo->m_pJsPlatform->Doc_submitForm) {
    153     return;
    154   }
    155   ByteString bsDestination = WideString(URL).UTF16LE_Encode();
    156   m_pInfo->m_pJsPlatform->Doc_submitForm(m_pInfo->m_pJsPlatform, formData,
    157                                          length,
    158                                          AsFPDFWideString(&bsDestination));
    159 }
    160 
    161 void CPDFSDK_FormFillEnvironment::JS_docmailForm(void* mailData,
    162                                                  int length,
    163                                                  FPDF_BOOL bUI,
    164                                                  const wchar_t* To,
    165                                                  const wchar_t* Subject,
    166                                                  const wchar_t* CC,
    167                                                  const wchar_t* BCC,
    168                                                  const wchar_t* Msg) {
    169   if (!m_pInfo || !m_pInfo->m_pJsPlatform ||
    170       !m_pInfo->m_pJsPlatform->Doc_mail) {
    171     return;
    172   }
    173   ByteString bsTo = WideString(To).UTF16LE_Encode();
    174   ByteString bsSubject = WideString(Subject).UTF16LE_Encode();
    175   ByteString bsCC = WideString(CC).UTF16LE_Encode();
    176   ByteString bsBcc = WideString(BCC).UTF16LE_Encode();
    177   ByteString bsMsg = WideString(Msg).UTF16LE_Encode();
    178   m_pInfo->m_pJsPlatform->Doc_mail(
    179       m_pInfo->m_pJsPlatform, mailData, length, bUI, AsFPDFWideString(&bsTo),
    180       AsFPDFWideString(&bsSubject), AsFPDFWideString(&bsCC),
    181       AsFPDFWideString(&bsBcc), AsFPDFWideString(&bsMsg));
    182 }
    183 
    184 void CPDFSDK_FormFillEnvironment::JS_docprint(FPDF_BOOL bUI,
    185                                               int nStart,
    186                                               int nEnd,
    187                                               FPDF_BOOL bSilent,
    188                                               FPDF_BOOL bShrinkToFit,
    189                                               FPDF_BOOL bPrintAsImage,
    190                                               FPDF_BOOL bReverse,
    191                                               FPDF_BOOL bAnnotations) {
    192   if (!m_pInfo || !m_pInfo->m_pJsPlatform ||
    193       !m_pInfo->m_pJsPlatform->Doc_print) {
    194     return;
    195   }
    196   m_pInfo->m_pJsPlatform->Doc_print(m_pInfo->m_pJsPlatform, bUI, nStart, nEnd,
    197                                     bSilent, bShrinkToFit, bPrintAsImage,
    198                                     bReverse, bAnnotations);
    199 }
    200 
    201 void CPDFSDK_FormFillEnvironment::JS_docgotoPage(int nPageNum) {
    202   if (!m_pInfo || !m_pInfo->m_pJsPlatform ||
    203       !m_pInfo->m_pJsPlatform->Doc_gotoPage) {
    204     return;
    205   }
    206   m_pInfo->m_pJsPlatform->Doc_gotoPage(m_pInfo->m_pJsPlatform, nPageNum);
    207 }
    208 
    209 IJS_Runtime* CPDFSDK_FormFillEnvironment::GetJSRuntime() {
    210   if (!IsJSInitiated())
    211     return nullptr;
    212   if (!m_pJSRuntime)
    213     m_pJSRuntime.reset(IJS_Runtime::Create(this));
    214   return m_pJSRuntime.get();
    215 }
    216 
    217 CPDFSDK_AnnotHandlerMgr* CPDFSDK_FormFillEnvironment::GetAnnotHandlerMgr() {
    218   if (!m_pAnnotHandlerMgr)
    219     m_pAnnotHandlerMgr = pdfium::MakeUnique<CPDFSDK_AnnotHandlerMgr>(this);
    220   return m_pAnnotHandlerMgr.get();
    221 }
    222 
    223 CPDFSDK_ActionHandler* CPDFSDK_FormFillEnvironment::GetActionHandler() {
    224   if (!m_pActionHandler)
    225     m_pActionHandler = pdfium::MakeUnique<CPDFSDK_ActionHandler>();
    226   return m_pActionHandler.get();
    227 }
    228 
    229 CFFL_InteractiveFormFiller*
    230 CPDFSDK_FormFillEnvironment::GetInteractiveFormFiller() {
    231   if (!m_pFormFiller)
    232     m_pFormFiller = pdfium::MakeUnique<CFFL_InteractiveFormFiller>(this);
    233   return m_pFormFiller.get();
    234 }
    235 
    236 void CPDFSDK_FormFillEnvironment::Invalidate(UnderlyingPageType* page,
    237                                              const FX_RECT& rect) {
    238   if (m_pInfo && m_pInfo->FFI_Invalidate) {
    239     m_pInfo->FFI_Invalidate(m_pInfo, page, rect.left, rect.top, rect.right,
    240                             rect.bottom);
    241   }
    242 }
    243 
    244 void CPDFSDK_FormFillEnvironment::OutputSelectedRect(
    245     UnderlyingPageType* page,
    246     const CFX_FloatRect& rect) {
    247   if (m_pInfo && m_pInfo->FFI_OutputSelectedRect) {
    248     m_pInfo->FFI_OutputSelectedRect(m_pInfo, page, rect.left, rect.top,
    249                                     rect.right, rect.bottom);
    250   }
    251 }
    252 
    253 void CPDFSDK_FormFillEnvironment::SetCursor(int nCursorType) {
    254   if (m_pInfo && m_pInfo->FFI_SetCursor)
    255     m_pInfo->FFI_SetCursor(m_pInfo, nCursorType);
    256 }
    257 
    258 int CPDFSDK_FormFillEnvironment::SetTimer(int uElapse,
    259                                           TimerCallback lpTimerFunc) {
    260   if (m_pInfo && m_pInfo->FFI_SetTimer)
    261     return m_pInfo->FFI_SetTimer(m_pInfo, uElapse, lpTimerFunc);
    262   return -1;
    263 }
    264 
    265 void CPDFSDK_FormFillEnvironment::KillTimer(int nTimerID) {
    266   if (m_pInfo && m_pInfo->FFI_KillTimer)
    267     m_pInfo->FFI_KillTimer(m_pInfo, nTimerID);
    268 }
    269 
    270 FX_SYSTEMTIME CPDFSDK_FormFillEnvironment::GetLocalTime() const {
    271   FX_SYSTEMTIME fxtime;
    272   if (!m_pInfo || !m_pInfo->FFI_GetLocalTime)
    273     return fxtime;
    274 
    275   FPDF_SYSTEMTIME systime = m_pInfo->FFI_GetLocalTime(m_pInfo);
    276   fxtime.wDay = systime.wDay;
    277   fxtime.wDayOfWeek = systime.wDayOfWeek;
    278   fxtime.wHour = systime.wHour;
    279   fxtime.wMilliseconds = systime.wMilliseconds;
    280   fxtime.wMinute = systime.wMinute;
    281   fxtime.wMonth = systime.wMonth;
    282   fxtime.wSecond = systime.wSecond;
    283   fxtime.wYear = systime.wYear;
    284   return fxtime;
    285 }
    286 
    287 void CPDFSDK_FormFillEnvironment::OnChange() {
    288   if (m_pInfo && m_pInfo->FFI_OnChange)
    289     m_pInfo->FFI_OnChange(m_pInfo);
    290 }
    291 
    292 FPDF_PAGE CPDFSDK_FormFillEnvironment::GetCurrentPage(
    293     UnderlyingDocumentType* document) {
    294   if (m_pInfo && m_pInfo->FFI_GetCurrentPage)
    295     return m_pInfo->FFI_GetCurrentPage(m_pInfo, document);
    296   return nullptr;
    297 }
    298 
    299 void CPDFSDK_FormFillEnvironment::ExecuteNamedAction(const char* namedAction) {
    300   if (m_pInfo && m_pInfo->FFI_ExecuteNamedAction)
    301     m_pInfo->FFI_ExecuteNamedAction(m_pInfo, namedAction);
    302 }
    303 
    304 void CPDFSDK_FormFillEnvironment::OnSetFieldInputFocus(
    305     FPDF_WIDESTRING focusText,
    306     FPDF_DWORD nTextLen,
    307     bool bFocus) {
    308   if (m_pInfo && m_pInfo->FFI_SetTextFieldFocus)
    309     m_pInfo->FFI_SetTextFieldFocus(m_pInfo, focusText, nTextLen, bFocus);
    310 }
    311 
    312 void CPDFSDK_FormFillEnvironment::DoURIAction(const char* bsURI) {
    313   if (m_pInfo && m_pInfo->FFI_DoURIAction)
    314     m_pInfo->FFI_DoURIAction(m_pInfo, bsURI);
    315 }
    316 
    317 void CPDFSDK_FormFillEnvironment::DoGoToAction(int nPageIndex,
    318                                                int zoomMode,
    319                                                float* fPosArray,
    320                                                int sizeOfArray) {
    321   if (m_pInfo && m_pInfo->FFI_DoGoToAction) {
    322     m_pInfo->FFI_DoGoToAction(m_pInfo, nPageIndex, zoomMode, fPosArray,
    323                               sizeOfArray);
    324   }
    325 }
    326 
    327 #ifdef PDF_ENABLE_XFA
    328 void CPDFSDK_FormFillEnvironment::DisplayCaret(CPDFXFA_Page* page,
    329                                                FPDF_BOOL bVisible,
    330                                                double left,
    331                                                double top,
    332                                                double right,
    333                                                double bottom) {
    334   if (m_pInfo && m_pInfo->FFI_DisplayCaret) {
    335     m_pInfo->FFI_DisplayCaret(m_pInfo, page, bVisible, left, top, right,
    336                               bottom);
    337   }
    338 }
    339 
    340 int CPDFSDK_FormFillEnvironment::GetCurrentPageIndex(
    341     CPDFXFA_Context* document) {
    342   if (!m_pInfo || !m_pInfo->FFI_GetCurrentPageIndex)
    343     return -1;
    344   return m_pInfo->FFI_GetCurrentPageIndex(m_pInfo, document);
    345 }
    346 
    347 void CPDFSDK_FormFillEnvironment::SetCurrentPage(CPDFXFA_Context* document,
    348                                                  int iCurPage) {
    349   if (m_pInfo && m_pInfo->FFI_SetCurrentPage)
    350     m_pInfo->FFI_SetCurrentPage(m_pInfo, document, iCurPage);
    351 }
    352 
    353 WideString CPDFSDK_FormFillEnvironment::GetPlatform() {
    354   if (!m_pInfo || !m_pInfo->FFI_GetPlatform)
    355     return WideString();
    356 
    357   int nRequiredLen = m_pInfo->FFI_GetPlatform(m_pInfo, nullptr, 0);
    358   if (nRequiredLen <= 0)
    359     return WideString();
    360 
    361   std::vector<uint8_t> pBuff(nRequiredLen);
    362   int nActualLen =
    363       m_pInfo->FFI_GetPlatform(m_pInfo, pBuff.data(), nRequiredLen);
    364   if (nActualLen <= 0 || nActualLen > nRequiredLen)
    365     return WideString();
    366 
    367   return WideString::FromUTF16LE(reinterpret_cast<uint16_t*>(pBuff.data()),
    368                                  nActualLen / sizeof(uint16_t));
    369 }
    370 
    371 void CPDFSDK_FormFillEnvironment::GotoURL(CPDFXFA_Context* document,
    372                                           const WideStringView& wsURL) {
    373   if (!m_pInfo || !m_pInfo->FFI_GotoURL)
    374     return;
    375 
    376   ByteString bsTo = WideString(wsURL).UTF16LE_Encode();
    377   FPDF_WIDESTRING pTo = (FPDF_WIDESTRING)bsTo.GetBuffer(wsURL.GetLength());
    378   m_pInfo->FFI_GotoURL(m_pInfo, document, pTo);
    379   bsTo.ReleaseBuffer(bsTo.GetStringLength());
    380 }
    381 
    382 void CPDFSDK_FormFillEnvironment::GetPageViewRect(CPDFXFA_Page* page,
    383                                                   FS_RECTF& dstRect) {
    384   if (!m_pInfo || !m_pInfo->FFI_GetPageViewRect)
    385     return;
    386 
    387   double left;
    388   double top;
    389   double right;
    390   double bottom;
    391   m_pInfo->FFI_GetPageViewRect(m_pInfo, page, &left, &top, &right, &bottom);
    392   if (top < bottom)
    393     std::swap(top, bottom);
    394 
    395   dstRect.left = static_cast<float>(left);
    396   dstRect.top = static_cast<float>(top);
    397   dstRect.bottom = static_cast<float>(bottom);
    398   dstRect.right = static_cast<float>(right);
    399 }
    400 
    401 bool CPDFSDK_FormFillEnvironment::PopupMenu(CPDFXFA_Page* page,
    402                                             FPDF_WIDGET hWidget,
    403                                             int menuFlag,
    404                                             CFX_PointF pt) {
    405   return m_pInfo && m_pInfo->FFI_PopupMenu &&
    406          m_pInfo->FFI_PopupMenu(m_pInfo, page, hWidget, menuFlag, pt.x, pt.y);
    407 }
    408 
    409 void CPDFSDK_FormFillEnvironment::Alert(FPDF_WIDESTRING Msg,
    410                                         FPDF_WIDESTRING Title,
    411                                         int Type,
    412                                         int Icon) {
    413   if (m_pInfo && m_pInfo->m_pJsPlatform && m_pInfo->m_pJsPlatform->app_alert) {
    414     m_pInfo->m_pJsPlatform->app_alert(m_pInfo->m_pJsPlatform, Msg, Title, Type,
    415                                       Icon);
    416   }
    417 }
    418 
    419 void CPDFSDK_FormFillEnvironment::EmailTo(FPDF_FILEHANDLER* fileHandler,
    420                                           FPDF_WIDESTRING pTo,
    421                                           FPDF_WIDESTRING pSubject,
    422                                           FPDF_WIDESTRING pCC,
    423                                           FPDF_WIDESTRING pBcc,
    424                                           FPDF_WIDESTRING pMsg) {
    425   if (m_pInfo && m_pInfo->FFI_EmailTo)
    426     m_pInfo->FFI_EmailTo(m_pInfo, fileHandler, pTo, pSubject, pCC, pBcc, pMsg);
    427 }
    428 
    429 void CPDFSDK_FormFillEnvironment::UploadTo(FPDF_FILEHANDLER* fileHandler,
    430                                            int fileFlag,
    431                                            FPDF_WIDESTRING uploadTo) {
    432   if (m_pInfo && m_pInfo->FFI_UploadTo)
    433     m_pInfo->FFI_UploadTo(m_pInfo, fileHandler, fileFlag, uploadTo);
    434 }
    435 
    436 FPDF_FILEHANDLER* CPDFSDK_FormFillEnvironment::OpenFile(int fileType,
    437                                                         FPDF_WIDESTRING wsURL,
    438                                                         const char* mode) {
    439   if (m_pInfo && m_pInfo->FFI_OpenFile)
    440     return m_pInfo->FFI_OpenFile(m_pInfo, fileType, wsURL, mode);
    441   return nullptr;
    442 }
    443 
    444 RetainPtr<IFX_SeekableReadStream> CPDFSDK_FormFillEnvironment::DownloadFromURL(
    445     const wchar_t* url) {
    446   if (!m_pInfo || !m_pInfo->FFI_DownloadFromURL)
    447     return nullptr;
    448 
    449   ByteString bstrURL = WideString(url).UTF16LE_Encode();
    450   FPDF_WIDESTRING wsURL =
    451       (FPDF_WIDESTRING)bstrURL.GetBuffer(bstrURL.GetLength());
    452 
    453   FPDF_LPFILEHANDLER fileHandler = m_pInfo->FFI_DownloadFromURL(m_pInfo, wsURL);
    454   return MakeSeekableStream(fileHandler);
    455 }
    456 
    457 WideString CPDFSDK_FormFillEnvironment::PostRequestURL(
    458     const wchar_t* wsURL,
    459     const wchar_t* wsData,
    460     const wchar_t* wsContentType,
    461     const wchar_t* wsEncode,
    462     const wchar_t* wsHeader) {
    463   if (!m_pInfo || !m_pInfo->FFI_PostRequestURL)
    464     return L"";
    465 
    466   ByteString bsURL = WideString(wsURL).UTF16LE_Encode();
    467   FPDF_WIDESTRING URL = (FPDF_WIDESTRING)bsURL.GetBuffer(bsURL.GetLength());
    468 
    469   ByteString bsData = WideString(wsData).UTF16LE_Encode();
    470   FPDF_WIDESTRING data = (FPDF_WIDESTRING)bsData.GetBuffer(bsData.GetLength());
    471 
    472   ByteString bsContentType = WideString(wsContentType).UTF16LE_Encode();
    473   FPDF_WIDESTRING contentType =
    474       (FPDF_WIDESTRING)bsContentType.GetBuffer(bsContentType.GetLength());
    475 
    476   ByteString bsEncode = WideString(wsEncode).UTF16LE_Encode();
    477   FPDF_WIDESTRING encode =
    478       (FPDF_WIDESTRING)bsEncode.GetBuffer(bsEncode.GetLength());
    479 
    480   ByteString bsHeader = WideString(wsHeader).UTF16LE_Encode();
    481   FPDF_WIDESTRING header =
    482       (FPDF_WIDESTRING)bsHeader.GetBuffer(bsHeader.GetLength());
    483 
    484   FPDF_BSTR response;
    485   FPDF_BStr_Init(&response);
    486   m_pInfo->FFI_PostRequestURL(m_pInfo, URL, data, contentType, encode, header,
    487                               &response);
    488 
    489   WideString wsRet = WideString::FromUTF16LE(
    490       (FPDF_WIDESTRING)response.str, response.len / sizeof(FPDF_WIDESTRING));
    491   FPDF_BStr_Clear(&response);
    492 
    493   return wsRet;
    494 }
    495 
    496 FPDF_BOOL CPDFSDK_FormFillEnvironment::PutRequestURL(const wchar_t* wsURL,
    497                                                      const wchar_t* wsData,
    498                                                      const wchar_t* wsEncode) {
    499   if (!m_pInfo || !m_pInfo->FFI_PutRequestURL)
    500     return false;
    501 
    502   ByteString bsURL = WideString(wsURL).UTF16LE_Encode();
    503   FPDF_WIDESTRING URL = (FPDF_WIDESTRING)bsURL.GetBuffer(bsURL.GetLength());
    504 
    505   ByteString bsData = WideString(wsData).UTF16LE_Encode();
    506   FPDF_WIDESTRING data = (FPDF_WIDESTRING)bsData.GetBuffer(bsData.GetLength());
    507 
    508   ByteString bsEncode = WideString(wsEncode).UTF16LE_Encode();
    509   FPDF_WIDESTRING encode =
    510       (FPDF_WIDESTRING)bsEncode.GetBuffer(bsEncode.GetLength());
    511 
    512   return m_pInfo->FFI_PutRequestURL(m_pInfo, URL, data, encode);
    513 }
    514 
    515 WideString CPDFSDK_FormFillEnvironment::GetLanguage() {
    516   if (!m_pInfo || !m_pInfo->FFI_GetLanguage)
    517     return WideString();
    518 
    519   int nRequiredLen = m_pInfo->FFI_GetLanguage(m_pInfo, nullptr, 0);
    520   if (nRequiredLen <= 0)
    521     return WideString();
    522 
    523   std::vector<uint8_t> pBuff(nRequiredLen);
    524   int nActualLen =
    525       m_pInfo->FFI_GetLanguage(m_pInfo, pBuff.data(), nRequiredLen);
    526   if (nActualLen <= 0 || nActualLen > nRequiredLen)
    527     return WideString();
    528 
    529   return WideString::FromUTF16LE(reinterpret_cast<uint16_t*>(pBuff.data()),
    530                                  nActualLen / sizeof(uint16_t));
    531 }
    532 
    533 void CPDFSDK_FormFillEnvironment::PageEvent(int iPageCount,
    534                                             uint32_t dwEventType) const {
    535   if (m_pInfo && m_pInfo->FFI_PageEvent)
    536     m_pInfo->FFI_PageEvent(m_pInfo, iPageCount, dwEventType);
    537 }
    538 #endif  // PDF_ENABLE_XFA
    539 
    540 void CPDFSDK_FormFillEnvironment::ClearAllFocusedAnnots() {
    541   for (auto& it : m_PageMap) {
    542     if (it.second->IsValidSDKAnnot(GetFocusAnnot()))
    543       KillFocusAnnot(0);
    544   }
    545 }
    546 
    547 CPDFSDK_PageView* CPDFSDK_FormFillEnvironment::GetPageView(
    548     UnderlyingPageType* pUnderlyingPage,
    549     bool renew) {
    550   auto it = m_PageMap.find(pUnderlyingPage);
    551   if (it != m_PageMap.end())
    552     return it->second.get();
    553 
    554   if (!renew)
    555     return nullptr;
    556 
    557   auto pNew = pdfium::MakeUnique<CPDFSDK_PageView>(this, pUnderlyingPage);
    558   CPDFSDK_PageView* pPageView = pNew.get();
    559   m_PageMap[pUnderlyingPage] = std::move(pNew);
    560 
    561   // Delay to load all the annotations, to avoid endless loop.
    562   pPageView->LoadFXAnnots();
    563   return pPageView;
    564 }
    565 
    566 CPDFSDK_PageView* CPDFSDK_FormFillEnvironment::GetCurrentView() {
    567   UnderlyingPageType* pPage =
    568       UnderlyingFromFPDFPage(GetCurrentPage(m_pUnderlyingDoc.Get()));
    569   return pPage ? GetPageView(pPage, true) : nullptr;
    570 }
    571 
    572 CPDFSDK_PageView* CPDFSDK_FormFillEnvironment::GetPageView(int nIndex) {
    573   UnderlyingPageType* pTempPage = GetPage(nIndex);
    574   if (!pTempPage)
    575     return nullptr;
    576 
    577   auto it = m_PageMap.find(pTempPage);
    578   return it != m_PageMap.end() ? it->second.get() : nullptr;
    579 }
    580 
    581 void CPDFSDK_FormFillEnvironment::ProcJavascriptFun() {
    582   CPDF_Document* pPDFDoc = GetPDFDocument();
    583   CPDF_DocJSActions docJS(pPDFDoc);
    584   int iCount = docJS.CountJSActions();
    585   for (int i = 0; i < iCount; i++) {
    586     WideString csJSName;
    587     CPDF_Action jsAction = docJS.GetJSActionAndName(i, &csJSName);
    588     GetActionHandler()->DoAction_JavaScript(jsAction, csJSName, this);
    589   }
    590 }
    591 
    592 bool CPDFSDK_FormFillEnvironment::ProcOpenAction() {
    593   if (!m_pUnderlyingDoc)
    594     return false;
    595 
    596   const CPDF_Dictionary* pRoot = GetPDFDocument()->GetRoot();
    597   if (!pRoot)
    598     return false;
    599 
    600   CPDF_Object* pOpenAction = pRoot->GetDictFor("OpenAction");
    601   if (!pOpenAction)
    602     pOpenAction = pRoot->GetArrayFor("OpenAction");
    603   if (!pOpenAction)
    604     return false;
    605 
    606   if (pOpenAction->IsArray())
    607     return true;
    608 
    609   CPDF_Dictionary* pDict = pOpenAction->AsDictionary();
    610   if (!pDict)
    611     return false;
    612 
    613   CPDF_Action action(pDict);
    614   GetActionHandler()->DoAction_DocOpen(action, this);
    615   return true;
    616 }
    617 
    618 void CPDFSDK_FormFillEnvironment::RemovePageView(
    619     UnderlyingPageType* pUnderlyingPage) {
    620   auto it = m_PageMap.find(pUnderlyingPage);
    621   if (it == m_PageMap.end())
    622     return;
    623 
    624   CPDFSDK_PageView* pPageView = it->second.get();
    625   if (pPageView->IsLocked() || pPageView->IsBeingDestroyed())
    626     return;
    627 
    628   // Mark the page view so we do not come into |RemovePageView| a second
    629   // time while we're in the process of removing.
    630   pPageView->SetBeingDestroyed();
    631 
    632   // This must happen before we remove |pPageView| from the map because
    633   // |KillFocusAnnot| can call into the |GetPage| method which will
    634   // look for this page view in the map, if it doesn't find it a new one will
    635   // be created. We then have two page views pointing to the same page and
    636   // bad things happen.
    637   if (pPageView->IsValidSDKAnnot(GetFocusAnnot()))
    638     KillFocusAnnot(0);
    639 
    640   // Remove the page from the map to make sure we don't accidentally attempt
    641   // to use the |pPageView| while we're cleaning it up.
    642   m_PageMap.erase(it);
    643 }
    644 
    645 UnderlyingPageType* CPDFSDK_FormFillEnvironment::GetPage(int nIndex) {
    646   if (!m_pInfo || !m_pInfo->FFI_GetPage)
    647     return nullptr;
    648   return UnderlyingFromFPDFPage(
    649       m_pInfo->FFI_GetPage(m_pInfo, m_pUnderlyingDoc.Get(), nIndex));
    650 }
    651 
    652 CPDFSDK_InterForm* CPDFSDK_FormFillEnvironment::GetInterForm() {
    653   if (!m_pInterForm)
    654     m_pInterForm = pdfium::MakeUnique<CPDFSDK_InterForm>(this);
    655   return m_pInterForm.get();
    656 }
    657 
    658 void CPDFSDK_FormFillEnvironment::UpdateAllViews(CPDFSDK_PageView* pSender,
    659                                                  CPDFSDK_Annot* pAnnot) {
    660   for (const auto& it : m_PageMap) {
    661     CPDFSDK_PageView* pPageView = it.second.get();
    662     if (pPageView != pSender)
    663       pPageView->UpdateView(pAnnot);
    664   }
    665 }
    666 
    667 bool CPDFSDK_FormFillEnvironment::SetFocusAnnot(
    668     CPDFSDK_Annot::ObservedPtr* pAnnot) {
    669   if (m_bBeingDestroyed)
    670     return false;
    671   if (m_pFocusAnnot == *pAnnot)
    672     return true;
    673   if (m_pFocusAnnot && !KillFocusAnnot(0))
    674     return false;
    675   if (!*pAnnot)
    676     return false;
    677 
    678   CPDFSDK_PageView* pPageView = (*pAnnot)->GetPageView();
    679   if (!pPageView || !pPageView->IsValid())
    680     return false;
    681 
    682   CPDFSDK_AnnotHandlerMgr* pAnnotHandler = GetAnnotHandlerMgr();
    683   if (m_pFocusAnnot)
    684     return false;
    685 
    686 #ifdef PDF_ENABLE_XFA
    687   CPDFSDK_Annot::ObservedPtr pLastFocusAnnot(m_pFocusAnnot.Get());
    688   if (!pAnnotHandler->Annot_OnChangeFocus(pAnnot, &pLastFocusAnnot))
    689     return false;
    690 #endif  // PDF_ENABLE_XFA
    691   if (!pAnnotHandler->Annot_OnSetFocus(pAnnot, 0))
    692     return false;
    693   if (m_pFocusAnnot)
    694     return false;
    695 
    696   m_pFocusAnnot.Reset(pAnnot->Get());
    697   return true;
    698 }
    699 
    700 bool CPDFSDK_FormFillEnvironment::KillFocusAnnot(uint32_t nFlag) {
    701   if (!m_pFocusAnnot)
    702     return false;
    703 
    704   CPDFSDK_AnnotHandlerMgr* pAnnotHandler = GetAnnotHandlerMgr();
    705   CPDFSDK_Annot::ObservedPtr pFocusAnnot(m_pFocusAnnot.Get());
    706   m_pFocusAnnot.Reset();
    707 
    708 #ifdef PDF_ENABLE_XFA
    709   CPDFSDK_Annot::ObservedPtr pNull;
    710   if (!pAnnotHandler->Annot_OnChangeFocus(&pNull, &pFocusAnnot))
    711     return false;
    712 #endif  // PDF_ENABLE_XFA
    713 
    714   if (!pAnnotHandler->Annot_OnKillFocus(&pFocusAnnot, nFlag)) {
    715     m_pFocusAnnot.Reset(pFocusAnnot.Get());
    716     return false;
    717   }
    718 
    719   if (pFocusAnnot->GetAnnotSubtype() == CPDF_Annot::Subtype::WIDGET) {
    720     CPDFSDK_Widget* pWidget = static_cast<CPDFSDK_Widget*>(pFocusAnnot.Get());
    721     FormFieldType fieldType = pWidget->GetFieldType();
    722     if (fieldType == FormFieldType::kTextField ||
    723         fieldType == FormFieldType::kComboBox) {
    724       OnSetFieldInputFocus(nullptr, 0, false);
    725     }
    726   }
    727   return !m_pFocusAnnot;
    728 }
    729 
    730 bool CPDFSDK_FormFillEnvironment::GetPermissions(int nFlag) const {
    731   return !!(GetPDFDocument()->GetUserPermissions() & nFlag);
    732 }
    733