HRESULT ScriptHost::Initialize()
{
Finalize();
m_has_error = false;
HRESULT hr = S_OK;
IActiveScriptParsePtr parser;
pfc::stringcvt::string_wide_from_utf8_fast wname(m_host->get_script_engine());
pfc::stringcvt::string_wide_from_utf8_fast wcode(m_host->get_script_code());
// Load preprocessor module
script_preprocessor preprocessor(wcode.get_ptr());
preprocessor.process_script_info(m_host->ScriptInfo());
hr = InitScriptEngineByName(wname);
if (SUCCEEDED(hr)) hr = m_script_engine->SetScriptSite(this);
if (SUCCEEDED(hr)) hr = m_script_engine->QueryInterface(&parser);
if (SUCCEEDED(hr)) hr = parser->InitNew();
EnableSafeModeToScriptEngine(m_script_engine, g_cfg_safe_mode);
if (SUCCEEDED(hr)) hr = m_script_engine->AddNamedItem(L"window", SCRIPTITEM_ISVISIBLE);
if (SUCCEEDED(hr)) hr = m_script_engine->AddNamedItem(L"gdi", SCRIPTITEM_ISVISIBLE);
if (SUCCEEDED(hr)) hr = m_script_engine->AddNamedItem(L"fb", SCRIPTITEM_ISVISIBLE);
if (SUCCEEDED(hr)) hr = m_script_engine->AddNamedItem(L"utils", SCRIPTITEM_ISVISIBLE);
if (SUCCEEDED(hr)) hr = m_script_engine->AddNamedItem(L"plman", SCRIPTITEM_ISVISIBLE);
if (SUCCEEDED(hr)) hr = m_script_engine->AddNamedItem(L"et", SCRIPTITEM_ISVISIBLE);
if (SUCCEEDED(hr)) hr = m_script_engine->SetScriptState(SCRIPTSTATE_CONNECTED);
if (SUCCEEDED(hr)) hr = m_script_engine->GetScriptDispatch(NULL, &m_script_root);
// Parse imported scripts
if (SUCCEEDED(hr)) hr = ProcessImportedScripts(preprocessor, parser);
// Parse main script
DWORD source_context = 0;
if (SUCCEEDED(hr)) hr = GenerateSourceContext(NULL, wcode, source_context);
m_contextToPathMap[source_context] = "<main>";
if (SUCCEEDED(hr)) hr = parser->ParseScriptText(wcode.get_ptr(), NULL, NULL, NULL,
source_context, 0, SCRIPTTEXT_HOSTMANAGESSOURCE | SCRIPTTEXT_ISVISIBLE, NULL, NULL);
if (SUCCEEDED(hr))
{
m_engine_inited = true;
}
else
{
m_engine_inited = false;
m_has_error = true;
}
m_callback_invoker.init(m_script_root);
return hr;
}
HRESULT ScriptHost::ProcessImportedScripts(script_preprocessor &preprocessor, IActiveScriptParsePtr &parser)
{
// processing "@import"
script_preprocessor::t_script_list scripts;
HRESULT hr = preprocessor.process_import(m_host->ScriptInfo(), scripts);
for (t_size i = 0; i < scripts.get_count(); ++i)
{
DWORD source_context;
if (SUCCEEDED(hr)) hr = GenerateSourceContext(scripts[i].path.get_ptr(), scripts[i].code.get_ptr(), source_context);
if (FAILED(hr)) break;
m_contextToPathMap[source_context] = pfc::stringcvt::string_utf8_from_wide(scripts[i].path.get_ptr());
hr = parser->ParseScriptText(scripts[i].code.get_ptr(), NULL, NULL, NULL,
source_context, 0, SCRIPTTEXT_HOSTMANAGESSOURCE | SCRIPTTEXT_ISVISIBLE, NULL, NULL);
}
return hr;
}
/**
* Evaluate JavaScript expression.
*
* @parem [in] lpwszScript JavaScript expression
* @parem [out] lpwszResult evaluation result
* @return S_OK if successful.
*/
HRESULT JScriptEngine::Eval(LPCWSTR lpwszScript, LPWSTR lpwszResult)
{
HRESULT hr = E_FAIL;
if (m_spScript == NULL)
return E_FAIL;
IActiveScriptPtr spScript;
// Clone the scripting engine.
hr = m_spScript->Clone(&spScript);
if (FAILED(hr))
{
#ifdef _DEBUG
OutputDebugString(TEXT("Unable to clone JScript engine."));
#endif
return hr;
}
IActiveScriptParsePtr spScriptParse;
// Script Engine must support IActiveScriptParse for us to use it
hr = spScript->QueryInterface(IID_IActiveScriptParse, (void **)&spScriptParse);
if (FAILED(hr))
{
#ifdef _DEBUG
OutputDebugString(TEXT("JScript engine doesn't support IActiveScriptParse."));
#endif
return hr;
}
IActiveScriptSitePtr spScriptSite;
CComObject<JScriptSite>* pJScriptSite = NULL;
CComObject<JScriptSite>::CreateInstance(&pJScriptSite);
pJScriptSite->QueryInterface(IID_IActiveScriptSite, (void**)&spScriptSite);
// Set scripting site
hr = spScript->SetScriptSite(spScriptSite);
if (hr)
return hr;
// InitNew the object:
hr = spScriptParse->InitNew();
VARIANT v;
VariantInit(&v);
// Feed the custom JavaScript to the JavaScript engine.
hr = spScriptParse->ParseScriptText(lpwszScript, NULL, NULL, NULL, 0, 0, SCRIPTTEXT_ISEXPRESSION , &v, NULL);
if (v.vt == VT_BSTR)
{
wsprintfW(lpwszResult, L"%s", v.bstrVal);
}
VariantClear(&v);
return hr;
}
