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// Copyright 2014 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
#ifndef FPDFSDK_JAVASCRIPT_JS_DEFINE_H_
#define FPDFSDK_JAVASCRIPT_JS_DEFINE_H_
#include <vector>
#include "fpdfsdk/javascript/JS_Object.h"
#include "fpdfsdk/javascript/JS_Value.h"
#include "fpdfsdk/javascript/resource.h"
#include "fxjs/fxjs_v8.h"
struct JSConstSpec {
enum Type { Number = 0, String = 1 };
const char* pName;
Type eType;
double number;
const char* pStr;
};
struct JSPropertySpec {
const char* pName;
v8::AccessorGetterCallback pPropGet;
v8::AccessorSetterCallback pPropPut;
};
struct JSMethodSpec {
const char* pName;
v8::FunctionCallback pMethodCall;
};
template <class C, CJS_Return (C::*M)(CJS_Runtime*)>
void JSPropGetter(const char* prop_name_string,
const char* class_name_string,
v8::Local<v8::String> property,
const v8::PropertyCallbackInfo<v8::Value>& info) {
CJS_Runtime* pRuntime =
CJS_Runtime::CurrentRuntimeFromIsolate(info.GetIsolate());
if (!pRuntime)
return;
CJS_Object* pJSObj =
static_cast<CJS_Object*>(pRuntime->GetObjectPrivate(info.Holder()));
if (!pJSObj)
return;
C* pObj = reinterpret_cast<C*>(pJSObj->GetEmbedObject());
CJS_Return result = (pObj->*M)(pRuntime);
if (result.HasError()) {
pRuntime->Error(JSFormatErrorString(class_name_string, prop_name_string,
result.Error()));
return;
}
if (result.HasReturn())
info.GetReturnValue().Set(result.Return());
}
template <class C, CJS_Return (C::*M)(CJS_Runtime*, v8::Local<v8::Value>)>
void JSPropSetter(const char* prop_name_string,
const char* class_name_string,
v8::Local<v8::String> property,
v8::Local<v8::Value> value,
const v8::PropertyCallbackInfo<void>& info) {
CJS_Runtime* pRuntime =
CJS_Runtime::CurrentRuntimeFromIsolate(info.GetIsolate());
if (!pRuntime)
return;
CJS_Object* pJSObj =
static_cast<CJS_Object*>(pRuntime->GetObjectPrivate(info.Holder()));
if (!pJSObj)
return;
C* pObj = reinterpret_cast<C*>(pJSObj->GetEmbedObject());
CJS_Return result = (pObj->*M)(pRuntime, value);
if (result.HasError()) {
pRuntime->Error(JSFormatErrorString(class_name_string, prop_name_string,
result.Error()));
}
}
#define JS_STATIC_PROP(err_name, prop_name, class_name) \
static void get_##prop_name##_static( \
v8::Local<v8::String> property, \
const v8::PropertyCallbackInfo<v8::Value>& info) { \
JSPropGetter<class_name, &class_name::get_##prop_name>( \
#err_name, #class_name, property, info); \
} \
static void set_##prop_name##_static( \
v8::Local<v8::String> property, v8::Local<v8::Value> value, \
const v8::PropertyCallbackInfo<void>& info) { \
JSPropSetter<class_name, &class_name::set_##prop_name>( \
#err_name, #class_name, property, value, info); \
}
template <class C,
CJS_Return (C::*M)(CJS_Runtime*,
const std::vector<v8::Local<v8::Value>>&)>
void JSMethod(const char* method_name_string,
const char* class_name_string,
const v8::FunctionCallbackInfo<v8::Value>& info) {
CJS_Runtime* pRuntime =
CJS_Runtime::CurrentRuntimeFromIsolate(info.GetIsolate());
if (!pRuntime)
return;
CJS_Object* pJSObj =
static_cast<CJS_Object*>(pRuntime->GetObjectPrivate(info.Holder()));
if (!pJSObj)
return;
std::vector<v8::Local<v8::Value>> parameters;
for (unsigned int i = 0; i < (unsigned int)info.Length(); i++)
parameters.push_back(info[i]);
C* pObj = reinterpret_cast<C*>(pJSObj->GetEmbedObject());
CJS_Return result = (pObj->*M)(pRuntime, parameters);
if (result.HasError()) {
pRuntime->Error(JSFormatErrorString(class_name_string, method_name_string,
result.Error()));
return;
}
if (result.HasReturn())
info.GetReturnValue().Set(result.Return());
}
#define JS_STATIC_METHOD(method_name, class_name) \
static void method_name##_static( \
const v8::FunctionCallbackInfo<v8::Value>& info) { \
JSMethod<class_name, &class_name::method_name>(#method_name, #class_name, \
info); \
}
// All JS classes have a name, an object defintion ID, and the ability to
// register themselves with FXJS_V8. We never make a BASE class on its own
// because it can't really do anything.
#define DECLARE_JS_CLASS_BASE_PART() \
static const char* g_pClassName; \
static int g_nObjDefnID; \
static void DefineJSObjects(CFXJS_Engine* pEngine, FXJSOBJTYPE eObjType);
#define IMPLEMENT_JS_CLASS_BASE_PART(js_class_name, class_name) \
const char* js_class_name::g_pClassName = #class_name; \
int js_class_name::g_nObjDefnID = -1;
#define DECLARE_JS_CLASS_CONST_PART() \
static JSConstSpec ConstSpecs[]; \
static void DefineConsts(CFXJS_Engine* pEngine);
#define IMPLEMENT_JS_CLASS_CONST_PART(js_class_name, class_name) \
void js_class_name::DefineConsts(CFXJS_Engine* pEngine) { \
for (size_t i = 0; i < FX_ArraySize(ConstSpecs) - 1; ++i) { \
pEngine->DefineObjConst( \
g_nObjDefnID, ConstSpecs[i].pName, \
ConstSpecs[i].eType == JSConstSpec::Number \
? pEngine->NewNumber(ConstSpecs[i].number).As<v8::Value>() \
: pEngine->NewString(ConstSpecs[i].pStr).As<v8::Value>()); \
} \
}
#define IMPLEMENT_JS_CLASS_CONST(js_class_name, class_name) \
IMPLEMENT_JS_CLASS_BASE_PART(js_class_name, class_name) \
IMPLEMENT_JS_CLASS_CONST_PART(js_class_name, class_name) \
void js_class_name::DefineJSObjects(CFXJS_Engine* pEngine, \
FXJSOBJTYPE eObjType) { \
g_nObjDefnID = pEngine->DefineObj(js_class_name::g_pClassName, eObjType, \
nullptr, nullptr); \
DefineConsts(pEngine); \
}
// Rich JS classes provide constants, methods, properties, and the ability
// to construct native object state.
#define DECLARE_JS_CLASS() \
DECLARE_JS_CLASS_BASE_PART() \
DECLARE_JS_CLASS_CONST_PART() \
DECLARE_JS_CLASS_PART()
#define IMPLEMENT_JS_CLASS(js_class_name, class_alternate, class_name) \
IMPLEMENT_JS_CLASS_BASE_PART(js_class_name, class_name) \
IMPLEMENT_JS_CLASS_CONST_PART(js_class_name, class_name) \
IMPLEMENT_JS_CLASS_PART(js_class_name, class_alternate, class_name) \
void js_class_name::DefineJSObjects(CFXJS_Engine* pEngine, \
FXJSOBJTYPE eObjType) { \
g_nObjDefnID = pEngine->DefineObj(js_class_name::g_pClassName, eObjType, \
JSConstructor, JSDestructor); \
DefineConsts(pEngine); \
DefineProps(pEngine); \
DefineMethods(pEngine); \
}
#define DECLARE_JS_CLASS_PART() \
static void JSConstructor(CFXJS_Engine* pEngine, v8::Local<v8::Object> obj); \
static void JSDestructor(CFXJS_Engine* pEngine, v8::Local<v8::Object> obj); \
static void DefineProps(CFXJS_Engine* pEngine); \
static void DefineMethods(CFXJS_Engine* pEngine); \
static JSPropertySpec PropertySpecs[]; \
static JSMethodSpec MethodSpecs[];
#define IMPLEMENT_JS_CLASS_PART(js_class_name, class_alternate, class_name) \
void js_class_name::JSConstructor(CFXJS_Engine* pEngine, \
v8::Local<v8::Object> obj) { \
CJS_Object* pObj = new js_class_name(obj); \
pObj->SetEmbedObject(new class_alternate(pObj)); \
pEngine->SetObjectPrivate(obj, pObj); \
pObj->InitInstance(static_cast<CJS_Runtime*>(pEngine)); \
} \
void js_class_name::JSDestructor(CFXJS_Engine* pEngine, \
v8::Local<v8::Object> obj) { \
delete static_cast<js_class_name*>(pEngine->GetObjectPrivate(obj)); \
} \
void js_class_name::DefineProps(CFXJS_Engine* pEngine) { \
for (size_t i = 0; i < FX_ArraySize(PropertySpecs) - 1; ++i) { \
pEngine->DefineObjProperty(g_nObjDefnID, PropertySpecs[i].pName, \
PropertySpecs[i].pPropGet, \
PropertySpecs[i].pPropPut); \
} \
} \
void js_class_name::DefineMethods(CFXJS_Engine* pEngine) { \
for (size_t i = 0; i < FX_ArraySize(MethodSpecs) - 1; ++i) { \
pEngine->DefineObjMethod(g_nObjDefnID, MethodSpecs[i].pName, \
MethodSpecs[i].pMethodCall); \
} \
}
#endif // FPDFSDK_JAVASCRIPT_JS_DEFINE_H_
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