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#include "globals.h"
#include "V8Script.h"
#include "V8Wrappers.h"
#include <utf8_helpers.h>
using namespace v8;
#ifdef UNICODE
# define V8_TCHAR uint16_t
#else
# define V8_TCHAR char
#endif
V8Wrappers *wrappers = NULL;
void V8Script::initializeEngine()
{
if (wrappers != NULL)
return;
wrappers = new V8Wrappers();
}
V8Script::V8Script() : exceptionCallback(NULL), exceptionCallbackParam(NULL)
{
}
V8Script::~V8Script()
{
dispose();
}
bool V8Script::compile(const TCHAR *source, Dialog *dlg)
{
dispose();
HandleScope handle_scope;
context = Context::New(NULL, wrappers->getGlobalTemplate());
Context::Scope context_scope(context);
context->Global()->Set(String::New("window"), wrappers->newDialogState(), ReadOnly);
context->Global()->Set(String::New("opts"), wrappers->newOptions(), ReadOnly);
context->Global()->Set(String::New("info"), wrappers->newDialogInfo(), ReadOnly);
for(unsigned int i = 0; i < dlg->getFieldCount(); i++)
{
Field *field = dlg->getField(i);
context->Global()->Set(String::New(field->getName()), wrappers->newState(field->getType()), ReadOnly);
}
TryCatch try_catch;
Local<Script> script = Script::Compile(String::New((const V8_TCHAR *) source), String::New(dlg->getName()));
if (script.IsEmpty())
{
reportException(&try_catch);
dispose();
return false;
}
// Run once to get the functions
Handle<Value> result = script->Run();
if (script.IsEmpty())
{
reportException(&try_catch);
dispose();
return false;
}
Handle<Value> configureFunction = context->Global()->Get(String::New("configure"));
if (!configureFunction.IsEmpty() && !configureFunction->IsFunction())
configureFunction.Clear();
Handle<Value> drawFunction = context->Global()->Get(String::New("draw"));
if (drawFunction.IsEmpty() || !drawFunction->IsFunction())
{
dispose();
return false;
}
this->configureFunction = Persistent<Function>::New(Handle<Function>::Cast(configureFunction));
this->drawFunction = Persistent<Function>::New(Handle<Function>::Cast(drawFunction));
return true;
}
void V8Script::dispose()
{
context.Dispose();
configureFunction.Dispose();
drawFunction.Dispose();
context.Clear();
configureFunction.Clear();
drawFunction.Clear();
}
bool V8Script::isValid()
{
return !context.IsEmpty() && !drawFunction.IsEmpty();
}
static Handle<Object> get(Handle<Object> obj, const char *field)
{
HandleScope scope;
Local<Value> v = obj->Get(String::New(field));
_ASSERT(!v.IsEmpty());
_ASSERT(!v->IsUndefined());
_ASSERT(v->IsObject());
return scope.Close( Handle<Object>::Cast(v) );
}
void V8Script::fillWrappers(DialogState *state, SkinOptions *opts, DialogInfo *info, bool configure)
{
Local<Object> global = context->Global();
wrappers->fillOptions(get(global, "opts"), opts, configure);
wrappers->fillDialogState(get(global, "window"), state);
wrappers->fillDialogInfo(get(global, "info"), info);
for(unsigned int i = 0; i < state->fields.size(); i++)
{
FieldState *field = state->fields[i];
wrappers->fillState(get(global, field->getField()->getName()), field);
}
}
std::pair<SkinOptions *,DialogState *> V8Script::configure(Dialog *dlg)
{
if (!isValid())
return std::pair<SkinOptions *,DialogState *>(NULL, NULL);
SkinOptions *opts = new SkinOptions();
DialogState *state = dlg->createState();
if (!configureFunction.IsEmpty())
{
HandleScope handle_scope;
Context::Scope context_scope(context);
fillWrappers(state, opts, dlg->getInfo(), true);
TryCatch try_catch;
Handle<Value> result = configureFunction->Call(context->Global(), 0, NULL);
if (result.IsEmpty())
{
reportException(&try_catch);
delete opts;
delete state;
return std::pair<SkinOptions *,DialogState *>(NULL, NULL);;
}
}
return std::pair<SkinOptions *,DialogState *>(opts, state);
}
bool V8Script::run(DialogState * state, SkinOptions *opts, DialogInfo *info)
{
if (!isValid())
return false;
HandleScope handle_scope;
Context::Scope context_scope(context);
fillWrappers(state, opts, info, false);
TryCatch try_catch;
Handle<Value> result = drawFunction->Call(context->Global(), 0, NULL);
if (result.IsEmpty())
{
reportException(&try_catch);
return false;
}
return true;
}
void V8Script::setExceptionCallback(ExceptionCallback cb, void *param)
{
exceptionCallback = cb;
exceptionCallbackParam = param;
}
void V8Script::reportException(v8::TryCatch *try_catch)
{
std::string err;
char tmp[1024];
HandleScope handle_scope;
String::Utf8Value exception(try_catch->Exception());
Handle<Message> message = try_catch->Message();
if (message.IsEmpty())
{
// V8 didn't provide any extra information about this error; just
// print the exception.
_snprintf(tmp, 1024, "%s\n", *exception);
err += tmp;
}
else
{
// Print (filename):(line number): (message).
String::Utf8Value filename(message->GetScriptResourceName());
int linenum = message->GetLineNumber();
_snprintf(tmp, 1024, "%s:%i: %s\n", *filename, linenum, *exception);
err += tmp;
// Print line of source code.
String::Utf8Value sourceline(message->GetSourceLine());
_snprintf(tmp, 1024, "%s\n", *sourceline);
err += tmp;
// Print wavy underline (GetUnderline is deprecated).
int start = message->GetStartColumn();
for (int i = 0; i < start; i++) {
err += " ";
}
int end = message->GetEndColumn();
for (int i = start; i < end; i++) {
err += "^";
}
err += "\n";
}
Utf8ToTchar tcharErr(err.c_str());
OutputDebugString(tcharErr);
if (exceptionCallback != NULL)
exceptionCallback(exceptionCallbackParam, tcharErr);
}
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