[xfa] Refactor CJX method signatures.

This CL changes the CJX methods from void (*)(CFXJSE_Arguments*) to
CJS_Return (*)(CJS_V8* runtime, const std::vector<v8::Local<v8::Value>>&
params) which is closer to how CJS works in practice.

Change-Id: I3a3129268acfe4262dfeb04179919ed19f6c24e1
Reviewed-on: https://pdfium-review.googlesource.com/20491
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/fxjs/cjs_v8.cpp b/fxjs/cjs_v8.cpp
index 67f0cb52b1..18bbed606c 100644
--- a/fxjs/cjs_v8.cpp
+++ b/fxjs/cjs_v8.cpp
@@ -6,6 +6,11 @@
 
 #include "fxjs/cjs_v8.h"
 
+#ifdef PDF_ENABLE_XFA
+#include "fxjs/cfxjse_context.h"
+#include "xfa/fxfa/parser/cxfa_object.h"
+#endif  // PDF_ENABLE_XFA
+
 CJS_V8::CJS_V8(v8::Isolate* isolate) : m_isolate(isolate) {}
 
 CJS_V8::~CJS_V8() {
@@ -176,6 +181,17 @@ WideString CJS_V8::ToWideString(v8::Local<v8::Value> pValue) {
   return WideString::FromUTF8(ByteStringView(*s, s.length()));
 }
 
+ByteString CJS_V8::ToByteString(v8::Local<v8::Value> pValue) {
+  if (pValue.IsEmpty())
+    return ByteString();
+  v8::Local<v8::Context> context = m_isolate->GetCurrentContext();
+  v8::MaybeLocal<v8::String> maybe_string = pValue->ToString(context);
+  if (maybe_string.IsEmpty())
+    return ByteString();
+  v8::String::Utf8Value s(maybe_string.ToLocalChecked());
+  return ByteString(*s);
+}
+
 v8::Local<v8::Object> CJS_V8::ToObject(v8::Local<v8::Value> pValue) {
   if (pValue.IsEmpty() || !pValue->IsObject())
     return v8::Local<v8::Object>();
@@ -197,3 +213,29 @@ void CJS_V8::SetConstArray(const WideString& name, v8::Local<v8::Array> array) {
 v8::Local<v8::Array> CJS_V8::GetConstArray(const WideString& name) {
   return v8::Local<v8::Array>::New(GetIsolate(), m_ConstArrays[name]);
 }
+
+#ifdef PDF_ENABLE_XFA
+CXFA_Object* CJS_V8::ToXFAObject(v8::Local<v8::Value> obj) {
+  ASSERT(!obj.IsEmpty());
+
+  if (!obj->IsObject())
+    return nullptr;
+
+  CFXJSE_HostObject* hostObj =
+      FXJSE_RetrieveObjectBinding(obj.As<v8::Object>(), nullptr);
+  if (!hostObj || hostObj->type() != CFXJSE_HostObject::kXFA)
+    return nullptr;
+  return static_cast<CXFA_Object*>(hostObj);
+}
+
+v8::Local<v8::Value> CJS_V8::NewXFAObject(
+    CXFA_Object* obj,
+    v8::Global<v8::FunctionTemplate>& tmpl) {
+  v8::EscapableHandleScope scope(m_isolate);
+  v8::Local<v8::FunctionTemplate> klass =
+      v8::Local<v8::FunctionTemplate>::New(m_isolate, tmpl);
+  v8::Local<v8::Object> object = klass->InstanceTemplate()->NewInstance();
+  FXJSE_UpdateObjectBinding(object, obj);
+  return scope.Escape(object);
+}
+#endif  // PDF_ENABLE_XFA