Add observer for BAAnnots from Javascript

fpdfsdk/cpdfsdk_widget.cpp

 // Copyright 2016 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 "fpdfsdk/include/cpdfsdk_widget.h"
 
 #include <memory>
 
 #include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_stream.h"
 #include "core/fpdfdoc/include/cpdf_defaultappearance.h"
 #include "core/fpdfdoc/include/cpdf_formcontrol.h"
 #include "core/fpdfdoc/include/cpdf_formfield.h"
 #include "core/fpdfdoc/include/cpdf_iconfit.h"
 #include "core/fpdfdoc/include/cpdf_interform.h"
 #include "core/fxge/include/cfx_graphstatedata.h"
 #include "core/fxge/include/cfx_pathdata.h"
 #include "core/fxge/include/cfx_renderdevice.h"
 #include "fpdfsdk/formfiller/cba_fontmap.h"
 #include "fpdfsdk/fxedit/include/fxet_edit.h"
 #include "fpdfsdk/include/cpdfsdk_interform.h"
 #include "fpdfsdk/include/fsdk_define.h"
 #include "fpdfsdk/include/fsdk_mgr.h"
 #include "fpdfsdk/pdfwindow/PWL_Edit.h"
 #include "fpdfsdk/pdfwindow/PWL_Utils.h"
-#include "third_party/base/stl_util.h"
 
 #ifdef PDF_ENABLE_XFA
 #include "fpdfsdk/fpdfxfa/include/fpdfxfa_doc.h"
 #include "xfa/fxfa/include/cxfa_eventparam.h"
 #include "xfa/fxfa/include/fxfa_widget.h"
 #include "xfa/fxfa/include/xfa_ffdocview.h"
 #include "xfa/fxfa/include/xfa_ffwidget.h"
 #include "xfa/fxfa/include/xfa_ffwidgethandler.h"
 #endif  // PDF_ENABLE_XFA
 
-CPDFSDK_Widget::Observer::Observer(CPDFSDK_Widget** pWatchedPtr)
-    : m_pWatchedPtr(pWatchedPtr) {
-  (*m_pWatchedPtr)->AddObserver(this);
-}
-
-CPDFSDK_Widget::Observer::~Observer() {
-  if (m_pWatchedPtr)
-    (*m_pWatchedPtr)->RemoveObserver(this);
-}
-
-void CPDFSDK_Widget::Observer::OnWidgetDestroyed() {
-  ASSERT(m_pWatchedPtr);
-  *m_pWatchedPtr = nullptr;
-  m_pWatchedPtr = nullptr;
-}
-
 CPDFSDK_Widget::CPDFSDK_Widget(CPDF_Annot* pAnnot,
                                CPDFSDK_PageView* pPageView,
                                CPDFSDK_InterForm* pInterForm)
     : CPDFSDK_BAAnnot(pAnnot, pPageView),
       m_pInterForm(pInterForm),
       m_nAppAge(0),
       m_nValueAge(0)
 #ifdef PDF_ENABLE_XFA
       ,
       m_hMixXFAWidget(nullptr),
       m_pWidgetHandler(nullptr)
 #endif  // PDF_ENABLE_XFA
 {
 }
 
-CPDFSDK_Widget::~CPDFSDK_Widget() {
-  for (auto* pObserver : m_Observers)
-    pObserver->OnWidgetDestroyed();
-}
-
-void CPDFSDK_Widget::AddObserver(Observer* pObserver) {
-  ASSERT(!pdfium::ContainsKey(m_Observers, pObserver));
-  m_Observers.insert(pObserver);
-}
-
-void CPDFSDK_Widget::RemoveObserver(Observer* pObserver) {
-  ASSERT(pdfium::ContainsKey(m_Observers, pObserver));
-  m_Observers.erase(pObserver);
-}
+CPDFSDK_Widget::~CPDFSDK_Widget() {}
 
 #ifdef PDF_ENABLE_XFA
 CXFA_FFWidget* CPDFSDK_Widget::GetMixXFAWidget() const {
   CPDFSDK_Document* pSDKDoc = m_pPageView->GetSDKDocument();
   CPDFXFA_Document* pDoc = pSDKDoc->GetXFADocument();
   if (pDoc->GetDocType() == DOCTYPE_STATIC_XFA) {
     if (!m_hMixXFAWidget) {
       if (CXFA_FFDocView* pDocView = pDoc->GetXFADocView()) {
         CFX_WideString sName;
         if (GetFieldType() == FIELDTYPE_RADIOBUTTON) {
@@ skipping 1881 matching lines @@
     return FALSE;
 
   if (!IsVisible())
     return FALSE;
 
   if ((GetFieldFlags() & FIELDFLAG_READONLY) == FIELDFLAG_READONLY)
     return FALSE;
 
   return TRUE;
 }