From ce04a458828b45035dab46c13e14a1f0ae67a2b7 Mon Sep 17 00:00:00 2001
From: dsinclair <dsinclair@chromium.org>
Date: Wed, 7 Sep 2016 05:46:55 -0700
Subject: Add observer for BAAnnots from Javascript

This Cl moves the observer code from the CPDFSDK_Widget up into the
CPDFSDK_Annot base class and then adds a second observer for CPDFSDK_BAAnnot
objects.

This allows us to attach an observer to the Annot javascript class which will
update its internal pointer to the BAAnnot if the BAAnnot is destroyed by
the CPDFSDK_PageView being destroyed.

BUG=chromium:642307

Review-Url: https://codereview.chromium.org/2306663002
---
 fpdfsdk/javascript/Annot.cpp | 35 ++++++++++++++++++++++++++++-------
 1 file changed, 28 insertions(+), 7 deletions(-)

(limited to 'fpdfsdk/javascript/Annot.cpp')

diff --git a/fpdfsdk/javascript/Annot.cpp b/fpdfsdk/javascript/Annot.cpp
index a23d42f72a..ab84247baa 100644
--- a/fpdfsdk/javascript/Annot.cpp
+++ b/fpdfsdk/javascript/Annot.cpp
@@ -11,6 +11,14 @@
 #include "fpdfsdk/javascript/JS_Value.h"
 #include "fpdfsdk/javascript/cjs_context.h"
 
+namespace {
+
+CPDFSDK_BAAnnot* ToBAAnnot(CPDFSDK_Annot* annot) {
+  return static_cast<CPDFSDK_BAAnnot*>(annot);
+}
+
+}  // namespace
+
 BEGIN_JS_STATIC_CONST(CJS_Annot)
 END_JS_STATIC_CONST()
 
@@ -32,8 +40,12 @@ Annot::~Annot() {}
 FX_BOOL Annot::hidden(IJS_Context* cc,
                       CJS_PropValue& vp,
                       CFX_WideString& sError) {
+  CPDFSDK_BAAnnot* baAnnot = ToBAAnnot(m_pAnnot);
+  if (!baAnnot)
+    return FALSE;
+
   if (vp.IsGetting()) {
-    CPDF_Annot* pPDFAnnot = m_BAAnnot->GetPDFAnnot();
+    CPDF_Annot* pPDFAnnot = baAnnot->GetPDFAnnot();
     vp << CPDF_Annot::IsAnnotationHidden(pPDFAnnot->GetAnnotDict());
     return TRUE;
   }
@@ -41,7 +53,7 @@ FX_BOOL Annot::hidden(IJS_Context* cc,
   bool bHidden;
   vp >> bHidden;
 
-  uint32_t flags = m_BAAnnot->GetFlags();
+  uint32_t flags = baAnnot->GetFlags();
   if (bHidden) {
     flags |= ANNOTFLAG_HIDDEN;
     flags |= ANNOTFLAG_INVISIBLE;
@@ -53,21 +65,25 @@ FX_BOOL Annot::hidden(IJS_Context* cc,
     flags &= ~ANNOTFLAG_NOVIEW;
     flags |= ANNOTFLAG_PRINT;
   }
-  m_BAAnnot->SetFlags(flags);
+  baAnnot->SetFlags(flags);
   return TRUE;
 }
 
 FX_BOOL Annot::name(IJS_Context* cc,
                     CJS_PropValue& vp,
                     CFX_WideString& sError) {
+  CPDFSDK_BAAnnot* baAnnot = ToBAAnnot(m_pAnnot);
+  if (!baAnnot)
+    return FALSE;
+
   if (vp.IsGetting()) {
-    vp << m_BAAnnot->GetAnnotName();
+    vp << baAnnot->GetAnnotName();
     return TRUE;
   }
 
   CFX_WideString annotName;
   vp >> annotName;
-  m_BAAnnot->SetAnnotName(annotName);
+  baAnnot->SetAnnotName(annotName);
   return TRUE;
 }
 
@@ -80,10 +96,15 @@ FX_BOOL Annot::type(IJS_Context* cc,
     return FALSE;
   }
 
-  vp << CPDF_Annot::AnnotSubtypeToString(m_BAAnnot->GetAnnotSubtype());
+  CPDFSDK_BAAnnot* baAnnot = ToBAAnnot(m_pAnnot);
+  if (!baAnnot)
+    return FALSE;
+
+  vp << CPDF_Annot::AnnotSubtypeToString(baAnnot->GetAnnotSubtype());
   return TRUE;
 }
 
 void Annot::SetSDKAnnot(CPDFSDK_BAAnnot* annot) {
-  m_BAAnnot = annot;
+  m_pAnnot = annot;
+  m_pObserver.reset(new CPDFSDK_Annot::Observer(&m_pAnnot));
 }
-- 
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