fpdfsdk/src/javascript/JS_Runtime.cpp

// 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

#include "../../include/javascript/JavaScript.h"
#include "../../include/javascript/IJavaScript.h"
#include "../../include/javascript/JS_EventHandler.h"
#include "../../include/javascript/JS_Runtime.h"
#include "../../include/javascript/JS_Context.h"
#include "../../include/javascript/JS_Define.h"
#include "../../include/javascript/JS_Object.h"
#include "../../include/javascript/JS_Value.h"
#include "../../include/javascript/Document.h"
#include "../../include/javascript/app.h"
#include "../../include/javascript/color.h"
#include "../../include/javascript/Consts.h"
#include "../../include/javascript/Document.h"
#include "../../include/javascript/event.h"
#include "../../include/javascript/Field.h"
#include "../../include/javascript/Icon.h"
#include "../../include/javascript/PublicMethods.h"
#include "../../include/javascript/report.h"
#include "../../include/javascript/util.h"
#include "../../include/javascript/JS_GlobalData.h"
#include "../../include/javascript/global.h"
#include "../../include/javascript/console.h"
#include "../../include/fpdfxfa/fpdfxfa_app.h"
#include "../../../xfa/src/fxjse/src/value.h"

CJS_RuntimeFactory::~CJS_RuntimeFactory()
{
}

IFXJS_Runtime*                  CJS_RuntimeFactory::NewJSRuntime(CPDFDoc_Environment* pApp)
{
	if (!m_bInit)
	{
		JS_Initial();
		m_bInit = TRUE;
	}
	return new CJS_Runtime(pApp);
}
void                            CJS_RuntimeFactory::AddRef()
{
    //to do.Should be implemented as atom manipulation.
    m_nRef++;
}
void                            CJS_RuntimeFactory::Release()
{
    if(m_bInit)
    {
        //to do.Should be implemented as atom manipulation.
        if (--m_nRef == 0)
        {
            JS_Release();
            ReleaseGlobalData();
            m_bInit = FALSE;
        }
    }
}

void                            CJS_RuntimeFactory::DeleteJSRuntime(IFXJS_Runtime* pRuntime)
{
    delete (CJS_Runtime*)pRuntime;
}

CJS_GlobalData* CJS_RuntimeFactory::NewGlobalData(CPDFDoc_Environment* pApp)
{
    if (m_pGlobalData)
    {
        m_nGlobalDataCount++;
        return m_pGlobalData;
    }
    m_nGlobalDataCount = 1;
    m_pGlobalData = new CJS_GlobalData(pApp);
    return m_pGlobalData;
}

void CJS_RuntimeFactory::ReleaseGlobalData()
{
    m_nGlobalDataCount--;

    if (m_nGlobalDataCount <= 0)
    {
        delete m_pGlobalData;
        m_pGlobalData = NULL;
    }
}

void* CJS_ArrayBufferAllocator::Allocate(size_t length) {
    return calloc(1, length);
}

void* CJS_ArrayBufferAllocator::AllocateUninitialized(size_t length) {
    return malloc(length);
}

void CJS_ArrayBufferAllocator::Free(void* data, size_t length) {
    free(data);
}

/* ------------------------------ CJS_Runtime ------------------------------ */
extern v8::Global<v8::ObjectTemplate>& _getGlobalObjectTemplate(IJS_Runtime* pJSRuntime);
CJS_Runtime::CJS_Runtime(CPDFDoc_Environment* pApp) :
	m_pApp(pApp),
	m_pDocument(NULL),
	m_bBlocking(FALSE),
	m_pFieldEventPath(NULL)
{
	if (CPDFXFA_App::GetInstance()->GetJSERuntime()) {
		m_isolate = (v8::Isolate*)CPDFXFA_App::GetInstance()->GetJSERuntime();
	} else {
		m_pArrayBufferAllocator.reset(new CJS_ArrayBufferAllocator());
		v8::Isolate::CreateParams params;
		params.array_buffer_allocator = m_pArrayBufferAllocator.get();
		m_isolate = v8::Isolate::New(params);
	}

	v8::Isolate* isolate = m_isolate;
	v8::Isolate::Scope isolate_scope(isolate);
	v8::Locker locker(isolate);
	v8::HandleScope handle_scope(isolate);
	if (CPDFXFA_App::GetInstance()->InitRuntime(FALSE)) {
		CJS_Context * pContext = (CJS_Context*)NewContext();
		JS_InitialRuntime(*this, this, pContext, m_context);
		ReleaseContext(pContext);
		return;
	}

    InitJSObjects();

    CJS_Context * pContext = (CJS_Context*)NewContext();
    JS_InitialRuntime(*this, this, pContext, m_context);
    ReleaseContext(pContext);
}

CJS_Runtime::~CJS_Runtime()
{
	int size = m_ContextArray.GetSize();
	for (int i=0;i < size; i++)
		delete m_ContextArray.GetAt(i);

    m_ContextArray.RemoveAll();

    RemoveEventsInLoop(m_pFieldEventPath);

    m_pApp = NULL;
    m_pDocument = NULL;
    m_pFieldEventPath = NULL;
    m_context.Reset();

	m_isolate = NULL;
}

FX_BOOL CJS_Runtime::InitJSObjects()
{
	v8::Isolate::Scope isolate_scope(GetIsolate());
	v8::Locker locker(GetIsolate());
	v8::HandleScope handle_scope(GetIsolate());
	v8::Local<v8::Context> context = v8::Context::New(GetIsolate());
	v8::Context::Scope context_scope(context);
	//0 - 8
	if (CJS_Border::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Display::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Font::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Highlight::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Position::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_ScaleHow::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_ScaleWhen::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Style::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Zoomtype::Init(*this, JS_STATIC) < 0) return FALSE;

	//9 - 11
	if (CJS_App::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Color::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Console::Init(*this, JS_STATIC) < 0) return FALSE;

	//12 - 14
	if (CJS_Document::Init(*this, JS_DYNAMIC) < 0) return FALSE;
	if (CJS_Event::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Field::Init(*this, JS_DYNAMIC) < 0) return FALSE;

	//15 - 17
	if (CJS_Global::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Icon::Init(*this, JS_DYNAMIC) < 0) return FALSE;
	if (CJS_Util::Init(*this, JS_STATIC) < 0) return FALSE;

	if (CJS_PublicMethods::Init(*this) < 0) return FALSE;
	if (CJS_GlobalConsts::Init(*this) < 0) return FALSE;
	if (CJS_GlobalArrays::Init(*this) < 0) return FALSE;

	if (CJS_TimerObj::Init(*this, JS_DYNAMIC) < 0) return FALSE;
	if (CJS_PrintParamsObj::Init(*this, JS_DYNAMIC) <0) return FALSE;

	return TRUE;
}

IFXJS_Context* CJS_Runtime::NewContext()
{
    CJS_Context * p = new CJS_Context(this);
    m_ContextArray.Add(p);
    return p;
}

void CJS_Runtime::ReleaseContext(IFXJS_Context * pContext)
{
    CJS_Context* pJSContext = (CJS_Context*)pContext;

    for (int i=0, sz=m_ContextArray.GetSize(); i<sz; i++)
    {
        if (pJSContext == m_ContextArray.GetAt(i))
        {
            delete pJSContext;
            m_ContextArray.RemoveAt(i);
            break;
        }
    }
}

IFXJS_Context*  CJS_Runtime::GetCurrentContext()
{
    if(!m_ContextArray.GetSize())
        return NULL;
    return m_ContextArray.GetAt(m_ContextArray.GetSize()-1);
}

void CJS_Runtime::SetReaderDocument(CPDFSDK_Document* pReaderDoc)
{
	if (m_pDocument != pReaderDoc)
	{
		v8::Isolate::Scope isolate_scope(m_isolate);
		v8::Locker locker(m_isolate);
		v8::HandleScope handle_scope(m_isolate);
		v8::Local<v8::Context> context =v8::Local<v8::Context>::New(m_isolate, m_context);
		v8::Context::Scope context_scope(context);

		m_pDocument = pReaderDoc;

		if (pReaderDoc)
		{
			JSObject pThis = JS_GetThisObj(*this);
			if(!pThis.IsEmpty())
			{
				if (JS_GetObjDefnID(pThis) == JS_GetObjDefnID(*this, L"Document"))
				{
					if (CJS_Document* pJSDocument = (CJS_Document*)JS_GetPrivate(pThis))
					{
						if (Document * pDocument = (Document*)pJSDocument->GetEmbedObject())
							pDocument->AttachDoc(pReaderDoc);
					}
				}
			}
			JS_SetThisObj(*this, JS_GetObjDefnID(*this, L"Document"));
		}
		else
		{
			JS_SetThisObj(*this, JS_GetObjDefnID(*this, L"app"));
		}
	}
}

FX_BOOL CJS_Runtime::AddEventToLoop(const CFX_WideString& sTargetName, JS_EVENT_T eEventType)
{
    if (m_pFieldEventPath == NULL)
    {
        m_pFieldEventPath = new CJS_FieldEvent;
        m_pFieldEventPath->sTargetName = sTargetName;
        m_pFieldEventPath->eEventType = eEventType;
        m_pFieldEventPath->pNext = NULL;

        return TRUE;
    }

    //to search
    CJS_FieldEvent* p = m_pFieldEventPath;
    CJS_FieldEvent* pLast = m_pFieldEventPath;
    while (p)
    {
        if (p->eEventType == eEventType && p->sTargetName == sTargetName)
            return FALSE;

        pLast = p;
        p = p->pNext;
    }

    //to add
    CJS_FieldEvent* pNew = new CJS_FieldEvent;
    pNew->sTargetName = sTargetName;
    pNew->eEventType = eEventType;
    pNew->pNext = NULL;

    pLast->pNext = pNew;

    return TRUE;
}

void CJS_Runtime::RemoveEventInLoop(const CFX_WideString& sTargetName, JS_EVENT_T eEventType)
{
    FX_BOOL bFind = FALSE;

    CJS_FieldEvent* p = m_pFieldEventPath;
    CJS_FieldEvent* pLast = NULL;
    while (p)
    {
        if (p->eEventType == eEventType && p->sTargetName == sTargetName)
        {
            bFind = TRUE;
            break;
        }

        pLast = p;
        p = p->pNext;
    }

    if (bFind)
    {
        RemoveEventsInLoop(p);

        if (p == m_pFieldEventPath)
            m_pFieldEventPath = NULL;

        if (pLast)
            pLast->pNext = NULL;
    }
}

void CJS_Runtime::RemoveEventsInLoop(CJS_FieldEvent* pStart)
{
    CJS_FieldEvent* p = pStart;

    while (p)
    {
        CJS_FieldEvent* pOld = p;
        p = pOld->pNext;

        delete pOld;
    }
}

v8::Local<v8::Context>  CJS_Runtime::NewJSContext()
{
    return v8::Local<v8::Context>::New(m_isolate, m_context);
}

CFX_WideString ChangeObjName(const CFX_WideString& str)
{
    CFX_WideString sRet = str;
    sRet.Replace(L"_", L".");
    return sRet;
}
FX_BOOL	CJS_Runtime::GetHValueByName(const CFX_ByteStringC& utf8Name, FXJSE_HVALUE hValue)
{
	const FX_CHAR* name = utf8Name.GetCStr();

	v8::Locker lock(GetIsolate());
    v8::Isolate::Scope isolate_scope(GetIsolate());
    v8::HandleScope handle_scope(GetIsolate());
    v8::Local<v8::Context> context =
        v8::Local<v8::Context>::New(GetIsolate(), m_context);
    v8::Context::Scope context_scope(context);


	//v8::Local<v8::Context> tmpCotext = v8::Local<v8::Context>::New(GetIsolate(), m_context);
	v8::Local<v8::Value> propvalue = context->Global()->Get(v8::String::NewFromUtf8(GetIsolate(), name, v8::String::kNormalString, utf8Name.GetLength()));

	if (propvalue.IsEmpty()) {
		FXJSE_Value_SetUndefined(hValue);
		return FALSE;
	}
	((CFXJSE_Value*)hValue)->ForceSetValue(propvalue);

	return TRUE;
}
FX_BOOL	CJS_Runtime::SetHValueByName(const CFX_ByteStringC& utf8Name, FXJSE_HVALUE hValue)
{
	if (utf8Name.IsEmpty() || hValue == NULL)
		return FALSE;
	const FX_CHAR* name = utf8Name.GetCStr();
	v8::Isolate* pIsolate = GetIsolate();
	v8::Locker lock(pIsolate);
    v8::Isolate::Scope isolate_scope(pIsolate);
    v8::HandleScope handle_scope(pIsolate);
    v8::Local<v8::Context> context =
        v8::Local<v8::Context>::New(pIsolate, m_context);
    v8::Context::Scope context_scope(context);

	//v8::Local<v8::Context> tmpCotext = v8::Local<v8::Context>::New(GetIsolate(), m_context);
	v8::Local<v8::Value> propvalue = v8::Local<v8::Value>::New(GetIsolate(),((CFXJSE_Value*)hValue)->DirectGetValue());
	context->Global()->Set(v8::String::NewFromUtf8(pIsolate, name, v8::String::kNormalString, utf8Name.GetLength()), propvalue);

	return TRUE;
}