Make the CPDFXFA_App non-global

This CL changes CPDFXFA_App from a global object to a child of the
CPDFXFA_Document objects.

BUG=pdfium:623

Review-Url: https://codereview.chromium.org/2416753002

5 files changed, 77 insertions, 148 deletions

diff --git a/fpdfsdk/fpdfxfa/DEPS b/fpdfsdk/fpdfxfa/DEPS
index d4de6f1e89..1687e308b5 100644
--- a/fpdfsdk/fpdfxfa/DEPS
+++ b/fpdfsdk/fpdfxfa/DEPS
@@ -1,3 +1,4 @@
 include_rules = [
+  '+fxjs',
   '+xfa/fxbarcode',
 ]
diff --git a/fpdfsdk/fpdfxfa/cpdfxfa_app.cpp b/fpdfsdk/fpdfxfa/cpdfxfa_app.cpp
index 61694d0a28..b543d52315 100644
--- a/fpdfsdk/fpdfxfa/cpdfxfa_app.cpp
+++ b/fpdfsdk/fpdfxfa/cpdfxfa_app.cpp
@@ -11,110 +11,47 @@
 #include "fpdfsdk/cpdfsdk_formfillenvironment.h"
 #include "fpdfsdk/fpdfxfa/cxfa_fwladaptertimermgr.h"
 #include "fpdfsdk/fsdk_define.h"
+#include "fxjs/fxjs_v8.h"
 #include "third_party/base/ptr_util.h"
-#include "xfa/fxbarcode/BC_Library.h"
 #include "xfa/fxfa/xfa_ffapp.h"
 #include "xfa/fxfa/xfa_fontmgr.h"
 
-namespace {
-
-CPDFXFA_App* g_pApp = nullptr;
-
-}  // namespace
-
-CPDFXFA_App* CPDFXFA_App::GetInstance() {
-  if (!g_pApp) {
-    g_pApp = new CPDFXFA_App();
-  }
-  return g_pApp;
-}
-
-void CPDFXFA_App::ReleaseInstance() {
-  delete g_pApp;
-  g_pApp = nullptr;
-}
-
-CPDFXFA_App::CPDFXFA_App()
-    : m_bJavaScriptInitialized(FALSE), m_pIsolate(nullptr) {
-  m_pFormFillEnvList.RemoveAll();
-}
-
-CPDFXFA_App::~CPDFXFA_App() {
-  FXJSE_Runtime_Release(m_pIsolate);
-  m_pIsolate = nullptr;
-
-  FXJSE_Finalize();
-  BC_Library_Destory();
-}
-
-FX_BOOL CPDFXFA_App::Initialize(v8::Isolate* pIsolate) {
-  BC_Library_Init();
-  FXJSE_Initialize();
-
-  m_pIsolate = pIsolate ? pIsolate : FXJSE_Runtime_Create_Own();
-  if (!m_pIsolate)
-    return FALSE;
+CPDFXFA_App::CPDFXFA_App() : m_pIsolate(nullptr) {
+  // TODO(dsinclair): How do we 'release' the isolate?
+  FXJS_GetIsolate(&m_pIsolate);
 
   m_pXFAApp = pdfium::MakeUnique<CXFA_FFApp>(this);
-  m_pXFAApp->SetDefaultFontMgr(
-      std::unique_ptr<CXFA_DefFontMgr>(new CXFA_DefFontMgr));
-
-  return TRUE;
-}
-
-FX_BOOL CPDFXFA_App::AddFormFillEnv(CPDFSDK_FormFillEnvironment* pFormFillEnv) {
-  if (!pFormFillEnv)
-    return FALSE;
-
-  m_pFormFillEnvList.Add(pFormFillEnv);
-  return TRUE;
+  m_pXFAApp->SetDefaultFontMgr(pdfium::MakeUnique<CXFA_DefFontMgr>());
 }
 
-FX_BOOL CPDFXFA_App::RemoveFormFillEnv(
-    CPDFSDK_FormFillEnvironment* pFormFillEnv) {
-  if (!pFormFillEnv)
-    return FALSE;
-
-  int nFind = m_pFormFillEnvList.Find(pFormFillEnv);
-  if (nFind != -1) {
-    m_pFormFillEnvList.RemoveAt(nFind);
-    return TRUE;
-  }
-
-  return FALSE;
-}
+CPDFXFA_App::~CPDFXFA_App() {}
 
 void CPDFXFA_App::GetAppName(CFX_WideString& wsName) {
-  CPDFSDK_FormFillEnvironment* pFormFillEnv = m_pFormFillEnvList.GetAt(0);
-  if (pFormFillEnv)
-    wsName = pFormFillEnv->FFI_GetAppName();
+  if (m_pFormFillEnv)
+    wsName = m_pFormFillEnv->FFI_GetAppName();
 }
 
 void CPDFXFA_App::GetLanguage(CFX_WideString& wsLanguage) {
-  CPDFSDK_FormFillEnvironment* pFormFillEnv = m_pFormFillEnvList.GetAt(0);
-  if (pFormFillEnv)
-    wsLanguage = pFormFillEnv->GetLanguage();
+  if (m_pFormFillEnv)
+    wsLanguage = m_pFormFillEnv->GetLanguage();
 }
 
 void CPDFXFA_App::GetPlatform(CFX_WideString& wsPlatform) {
-  CPDFSDK_FormFillEnvironment* pFormFillEnv = m_pFormFillEnvList.GetAt(0);
-  if (pFormFillEnv) {
-    wsPlatform = pFormFillEnv->GetPlatform();
+  if (m_pFormFillEnv) {
+    wsPlatform = m_pFormFillEnv->GetPlatform();
   }
 }
 
 void CPDFXFA_App::Beep(uint32_t dwType) {
-  CPDFSDK_FormFillEnvironment* pFormFillEnv = m_pFormFillEnvList.GetAt(0);
-  if (pFormFillEnv)
-    pFormFillEnv->JS_appBeep(dwType);
+  if (m_pFormFillEnv)
+    m_pFormFillEnv->JS_appBeep(dwType);
 }
 
 int32_t CPDFXFA_App::MsgBox(const CFX_WideString& wsMessage,
                             const CFX_WideString& wsTitle,
                             uint32_t dwIconType,
                             uint32_t dwButtonType) {
-  CPDFSDK_FormFillEnvironment* pFormFillEnv = m_pFormFillEnvList.GetAt(0);
-  if (!pFormFillEnv)
+  if (!m_pFormFillEnv)
     return -1;
 
   uint32_t iconType = 0;
@@ -147,8 +84,8 @@ int32_t CPDFXFA_App::MsgBox(const CFX_WideString& wsMessage,
       iButtonType |= 3;
       break;
   }
-  int32_t iRet = pFormFillEnv->JS_appAlert(wsMessage.c_str(), wsTitle.c_str(),
-                                           iButtonType, iconType);
+  int32_t iRet = m_pFormFillEnv->JS_appAlert(wsMessage.c_str(), wsTitle.c_str(),
+                                             iButtonType, iconType);
   switch (iRet) {
     case 1:
       return XFA_IDOK;
@@ -167,29 +104,29 @@ CFX_WideString CPDFXFA_App::Response(const CFX_WideString& wsQuestion,
                                      const CFX_WideString& wsDefaultAnswer,
                                      FX_BOOL bMark) {
   CFX_WideString wsAnswer;
-  CPDFSDK_FormFillEnvironment* pFormFillEnv = m_pFormFillEnvList.GetAt(0);
-  if (pFormFillEnv) {
-    int nLength = 2048;
-    char* pBuff = new char[nLength];
-    nLength = pFormFillEnv->JS_appResponse(wsQuestion.c_str(), wsTitle.c_str(),
+  if (!m_pFormFillEnv)
+    return wsAnswer;
+
+  int nLength = 2048;
+  char* pBuff = new char[nLength];
+  nLength = m_pFormFillEnv->JS_appResponse(wsQuestion.c_str(), wsTitle.c_str(),
                                            wsDefaultAnswer.c_str(), nullptr,
                                            bMark, pBuff, nLength);
-    if (nLength > 0) {
-      nLength = nLength > 2046 ? 2046 : nLength;
-      pBuff[nLength] = 0;
-      pBuff[nLength + 1] = 0;
-      wsAnswer = CFX_WideString::FromUTF16LE(
-          reinterpret_cast<const unsigned short*>(pBuff),
-          nLength / sizeof(unsigned short));
-    }
-    delete[] pBuff;
+  if (nLength > 0) {
+    nLength = nLength > 2046 ? 2046 : nLength;
+    pBuff[nLength] = 0;
+    pBuff[nLength + 1] = 0;
+    wsAnswer = CFX_WideString::FromUTF16LE(
+        reinterpret_cast<const unsigned short*>(pBuff),
+        nLength / sizeof(unsigned short));
   }
+  delete[] pBuff;
   return wsAnswer;
 }
 
 IFX_FileRead* CPDFXFA_App::DownloadURL(const CFX_WideString& wsURL) {
-  CPDFSDK_FormFillEnvironment* pFormFillEnv = m_pFormFillEnvList.GetAt(0);
-  return pFormFillEnv ? pFormFillEnv->DownloadFromURL(wsURL.c_str()) : nullptr;
+  return m_pFormFillEnv ? m_pFormFillEnv->DownloadFromURL(wsURL.c_str())
+                        : nullptr;
 }
 
 FX_BOOL CPDFXFA_App::PostRequestURL(const CFX_WideString& wsURL,
@@ -198,23 +135,21 @@ FX_BOOL CPDFXFA_App::PostRequestURL(const CFX_WideString& wsURL,
                                     const CFX_WideString& wsEncode,
                                     const CFX_WideString& wsHeader,
                                     CFX_WideString& wsResponse) {
-  CPDFSDK_FormFillEnvironment* pFormFillEnv = m_pFormFillEnvList.GetAt(0);
-  if (!pFormFillEnv)
+  if (!m_pFormFillEnv)
     return FALSE;
 
-  wsResponse = pFormFillEnv->PostRequestURL(wsURL.c_str(), wsData.c_str(),
-                                            wsContentType.c_str(),
-                                            wsEncode.c_str(), wsHeader.c_str());
+  wsResponse = m_pFormFillEnv->PostRequestURL(
+      wsURL.c_str(), wsData.c_str(), wsContentType.c_str(), wsEncode.c_str(),
+      wsHeader.c_str());
   return TRUE;
 }
 
 FX_BOOL CPDFXFA_App::PutRequestURL(const CFX_WideString& wsURL,
                                    const CFX_WideString& wsData,
                                    const CFX_WideString& wsEncode) {
-  CPDFSDK_FormFillEnvironment* pFormFillEnv = m_pFormFillEnvList.GetAt(0);
-  return pFormFillEnv &&
-         pFormFillEnv->PutRequestURL(wsURL.c_str(), wsData.c_str(),
-                                     wsEncode.c_str());
+  return m_pFormFillEnv &&
+         m_pFormFillEnv->PutRequestURL(wsURL.c_str(), wsData.c_str(),
+                                       wsEncode.c_str());
 }
 
 void CPDFXFA_App::LoadString(int32_t iStringID, CFX_WideString& wsString) {
@@ -316,8 +251,7 @@ void CPDFXFA_App::LoadString(int32_t iStringID, CFX_WideString& wsString) {
 
 IFWL_AdapterTimerMgr* CPDFXFA_App::GetTimerMgr() {
   CXFA_FWLAdapterTimerMgr* pAdapter = nullptr;
-  CPDFSDK_FormFillEnvironment* pFormFillEnv = m_pFormFillEnvList.GetAt(0);
-  if (pFormFillEnv)
-    pAdapter = new CXFA_FWLAdapterTimerMgr(pFormFillEnv);
+  if (m_pFormFillEnv)
+    pAdapter = new CXFA_FWLAdapterTimerMgr(m_pFormFillEnv);
   return pAdapter;
 }
diff --git a/fpdfsdk/fpdfxfa/cpdfxfa_app.h b/fpdfsdk/fpdfxfa/cpdfxfa_app.h
index 78184d1434..ef5c3761c6 100644
--- a/fpdfsdk/fpdfxfa/cpdfxfa_app.h
+++ b/fpdfsdk/fpdfxfa/cpdfxfa_app.h
@@ -14,21 +14,13 @@ class IFXJS_Runtime;
 
 class CPDFXFA_App : public IXFA_AppProvider {
  public:
-  static CPDFXFA_App* GetInstance();
-  static void ReleaseInstance();
-
   CPDFXFA_App();
   ~CPDFXFA_App() override;
 
-  FX_BOOL Initialize(v8::Isolate* pIsolate);
   CXFA_FFApp* GetXFAApp() { return m_pXFAApp.get(); }
 
-  FX_BOOL AddFormFillEnv(CPDFSDK_FormFillEnvironment* pFormFillEnv);
-  FX_BOOL RemoveFormFillEnv(CPDFSDK_FormFillEnvironment* pFormFillEnv);
-
-  FX_BOOL IsJavaScriptInitialized() const { return m_bJavaScriptInitialized; }
-  void SetJavaScriptInitialized(FX_BOOL bInitialized) {
-    m_bJavaScriptInitialized = bInitialized;
+  void SetFormFillEnv(CPDFSDK_FormFillEnvironment* pFormFillEnv) {
+    m_pFormFillEnv = pFormFillEnv;
   }
 
   v8::Isolate* GetJSERuntime() const { return m_pIsolate; }
@@ -62,10 +54,8 @@ class CPDFXFA_App : public IXFA_AppProvider {
   void LoadString(int32_t iStringID, CFX_WideString& wsString) override;
   IFWL_AdapterTimerMgr* GetTimerMgr() override;
 
-  CFX_ArrayTemplate<CPDFSDK_FormFillEnvironment*> m_pFormFillEnvList;
-
- protected:
-  FX_BOOL m_bJavaScriptInitialized;
+ private:
+  CPDFSDK_FormFillEnvironment* m_pFormFillEnv;  // Not owned.
   std::unique_ptr<CXFA_FFApp> m_pXFAApp;
   v8::Isolate* m_pIsolate;
 };
diff --git a/fpdfsdk/fpdfxfa/cpdfxfa_document.cpp b/fpdfsdk/fpdfxfa/cpdfxfa_document.cpp
index df0da31beb..79d28c0637 100644
--- a/fpdfsdk/fpdfxfa/cpdfxfa_document.cpp
+++ b/fpdfsdk/fpdfxfa/cpdfxfa_document.cpp
@@ -16,6 +16,7 @@
 #include "fpdfsdk/fsdk_define.h"
 #include "fpdfsdk/javascript/ijs_runtime.h"
 #include "public/fpdf_formfill.h"
+#include "third_party/base/ptr_util.h"
 #include "xfa/fxfa/cxfa_eventparam.h"
 #include "xfa/fxfa/xfa_ffapp.h"
 #include "xfa/fxfa/xfa_ffdoc.h"
@@ -28,13 +29,11 @@ extern void SetLastError(int err);
 extern int GetLastError();
 #endif
 
-CPDFXFA_Document::CPDFXFA_Document(std::unique_ptr<CPDF_Document> pPDFDoc,
-                                   CPDFXFA_App* pProvider)
+CPDFXFA_Document::CPDFXFA_Document(std::unique_ptr<CPDF_Document> pPDFDoc)
     : m_iDocType(DOCTYPE_PDF),
       m_pPDFDoc(std::move(pPDFDoc)),
       m_pFormFillEnv(nullptr),
       m_pXFADocView(nullptr),
-      m_pApp(pProvider),
       m_nLoadStatus(FXFA_LOADSTATUS_PRELOAD),
       m_nPageCount(0),
       m_DocEnv(this) {}
@@ -42,6 +41,12 @@ CPDFXFA_Document::CPDFXFA_Document(std::unique_ptr<CPDF_Document> pPDFDoc,
 CPDFXFA_Document::~CPDFXFA_Document() {
   m_nLoadStatus = FXFA_LOADSTATUS_CLOSING;
 
+  // Must happen before we remove the form fill environment.
+  if (m_pXFADoc) {
+    if (CXFA_FFApp* pApp = GetApp()->GetXFAApp())
+      CloseXFADoc(pApp->GetDocHandler());
+  }
+
   if (m_pFormFillEnv) {
     m_pFormFillEnv->ClearAllFocusedAnnots();
     // Once we're deleted the FormFillEnvironment will point at a bad underlying
@@ -50,19 +55,23 @@ CPDFXFA_Document::~CPDFXFA_Document() {
     m_pFormFillEnv = nullptr;
   }
 
-  if (m_pXFADoc) {
-    CXFA_FFApp* pApp = m_pApp->GetXFAApp();
-    if (pApp) {
-      CXFA_FFDocHandler* pDocHandler = pApp->GetDocHandler();
-      if (pDocHandler)
-        CloseXFADoc(pDocHandler);
-    }
-    m_pXFADoc.reset();
-  }
-
   m_nLoadStatus = FXFA_LOADSTATUS_CLOSED;
 }
 
+void CPDFXFA_Document::CloseXFADoc(CXFA_FFDocHandler* pDoc) {
+  if (!pDoc)
+    return;
+  m_pXFADoc->CloseDoc();
+  m_pXFADoc.reset();
+  m_pXFADocView = nullptr;
+}
+
+CPDFXFA_App* CPDFXFA_Document::GetApp() {
+  if (!m_pApp)
+    m_pApp = pdfium::MakeUnique<CPDFXFA_App>();
+  return m_pApp.get();
+}
+
 FX_BOOL CPDFXFA_Document::LoadXFADoc() {
   m_nLoadStatus = FXFA_LOADSTATUS_LOADING;
 
@@ -71,7 +80,7 @@ FX_BOOL CPDFXFA_Document::LoadXFADoc() {
 
   m_XFAPageList.RemoveAll();
 
-  CXFA_FFApp* pApp = m_pApp->GetXFAApp();
+  CXFA_FFApp* pApp = GetApp()->GetXFAApp();
   if (!pApp)
     return FALSE;
 
@@ -95,7 +104,7 @@ FX_BOOL CPDFXFA_Document::LoadXFADoc() {
     return FALSE;
   }
   m_pXFADoc->StopLoad();
-  m_pXFADoc->GetXFADoc()->InitScriptContext(m_pApp->GetJSERuntime());
+  m_pXFADoc->GetXFADoc()->InitScriptContext(GetApp()->GetJSERuntime());
 
   if (m_pXFADoc->GetDocType() == XFA_DOCTYPE_Dynamic)
     m_iDocType = DOCTYPE_DYNAMIC_XFA;
diff --git a/fpdfsdk/fpdfxfa/cpdfxfa_document.h b/fpdfsdk/fpdfxfa/cpdfxfa_document.h
index de997c16f3..88c0e60f2d 100644
--- a/fpdfsdk/fpdfxfa/cpdfxfa_document.h
+++ b/fpdfsdk/fpdfxfa/cpdfxfa_document.h
@@ -9,11 +9,11 @@
 
 #include <memory>
 
+#include "fpdfsdk/fpdfxfa/cpdfxfa_app.h"
 #include "fpdfsdk/fpdfxfa/cpdfxfa_docenvironment.h"
 #include "xfa/fxfa/xfa_ffdoc.h"
 
 class CPDFSDK_FormFillEnvironment;
-class CPDFXFA_App;
 class CPDFXFA_Page;
 class CXFA_FFDocHandler;
 class IJS_Runtime;
@@ -29,8 +29,7 @@ enum LoadStatus {
 
 class CPDFXFA_Document {
  public:
-  CPDFXFA_Document(std::unique_ptr<CPDF_Document> pPDFDoc,
-                   CPDFXFA_App* pProvider);
+  CPDFXFA_Document(std::unique_ptr<CPDF_Document> pPDFDoc);
   ~CPDFXFA_Document();
 
   FX_BOOL LoadXFADoc();
@@ -38,9 +37,11 @@ class CPDFXFA_Document {
   CXFA_FFDoc* GetXFADoc() { return m_pXFADoc.get(); }
   CXFA_FFDocView* GetXFADocView() { return m_pXFADocView; }
   int GetDocType() const { return m_iDocType; }
+  CPDFXFA_App* GetApp();  // Creates if needed.
 
   CPDFSDK_FormFillEnvironment* GetFormFillEnv() const { return m_pFormFillEnv; }
   void SetFormFillEnv(CPDFSDK_FormFillEnvironment* pFormFillEnv) {
+    GetApp()->SetFormFillEnv(pFormFillEnv);
     m_pFormFillEnv = pFormFillEnv;
   }
 
@@ -68,13 +69,7 @@ class CPDFXFA_Document {
   CFX_ArrayTemplate<CPDFXFA_Page*>* GetXFAPageList() { return &m_XFAPageList; }
 
  private:
-  void CloseXFADoc(CXFA_FFDocHandler* pDoc) {
-    if (pDoc) {
-      m_pXFADoc->CloseDoc();
-      m_pXFADoc.reset();
-      m_pXFADocView = nullptr;
-    }
-  }
+  void CloseXFADoc(CXFA_FFDocHandler* pDoc);
 
   int m_iDocType;
 
@@ -82,7 +77,7 @@ class CPDFXFA_Document {
   std::unique_ptr<CXFA_FFDoc> m_pXFADoc;
   CPDFSDK_FormFillEnvironment* m_pFormFillEnv;  // not owned.
   CXFA_FFDocView* m_pXFADocView;  // not owned.
-  CPDFXFA_App* const m_pApp;
+  std::unique_ptr<CPDFXFA_App> m_pApp;
   CFX_ArrayTemplate<CPDFXFA_Page*> m_XFAPageList;
   LoadStatus m_nLoadStatus;
   int m_nPageCount;