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/**
* Phoebe DOM Implementation.
*
* This is a C++ approximation of the W3C DOM model, which follows
* fairly closely the specifications in the various .idl files, copies of
* which are provided for reference. Most important is this one:
*
* http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407/idl-definitions.html
*
* Authors:
* Bob Jamison
*
* Copyright (C) 2006-2007 Bob Jamison
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "jsengine.h"
#include "jsdombind.h"
#include <stdio.h>
#include <stdarg.h>
namespace org
{
namespace w3c
{
namespace dom
{
//########################################################################
//# M E S S A G E S
//########################################################################
void JavascriptEngine::error(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
fprintf(stderr, "JS error: ");
vfprintf(stderr, fmt, args);
fprintf(stderr, "\n");
va_end(args);
}
void JavascriptEngine::trace(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
fprintf(stdout, "JS: ");
vfprintf(stdout, fmt, args);
fprintf(stdout, "\n");
va_end(args);
}
static JSClass globalClass =
{
"Global", 0,
JS_PropertyStub, JS_PropertyStub,
JS_PropertyStub, JS_PropertyStub,
JS_EnumerateStub, JS_ResolveStub,
JS_ConvertStub, JS_FinalizeStub
};
//A couple of shell functions from js.c
static JSBool shellf_version(JSContext *cx, JSObject *obj,
uintN argc, jsval *argv, jsval *rval)
{
if (argc > 0 && JSVAL_IS_INT(argv[0]))
*rval = INT_TO_JSVAL(JS_SetVersion(cx, (JSVersion) JSVAL_TO_INT(argv[0])));
else
*rval = INT_TO_JSVAL(JS_GetVersion(cx));
return JS_TRUE;
}
static JSBool shellf_print(JSContext *cx, JSObject *obj,
uintN argc, jsval *argv, jsval *rval)
{
uintN i, n;
JSString *str;
for (i = n = 0; i < argc; i++)
{
str = JS_ValueToString(cx, argv[i]);
if (!str)
return JS_FALSE;
fprintf(stdout, "%s%s", i ? " " : "", JS_GetStringBytes(str));
}
n++;
if (n)
fputc('\n', stdout);
return JS_TRUE;
}
static JSFunctionSpec shell_functions[] =
{
{"version", shellf_version, 0},
{"print", shellf_print, 0},
{ 0 }
};
bool JavascriptEngine::startup()
{
/* You need a runtime and one or more contexts to do anything with JS. */
rt = JS_NewRuntime(0x400000L);
if (!rt)
{
error("can't create JavaScript runtime");
return false;
}
cx = JS_NewContext(rt, 8192);
if (!cx)
{
error("can't create JavaScript context");
return false;
}
JS_SetContextPrivate(cx, (void *)this);
JS_SetErrorReporter(cx, errorReporter);
/*
* The context definitely wants a global object, in order to have standard
* classes and functions like Date and parseInt. See below for details on
* JS_NewObject.
*/
globalObj = JS_NewObject(cx, &globalClass, 0, 0);
if (!globalObj)
{
error("Could not init global object");
return false;
}
if (!JS_InitStandardClasses(cx, globalObj))
{
error("Could not init standard classes");
return false;
}
if (!JS_DefineFunctions(cx, globalObj, shell_functions))
{
error("Could not add extra functions");
return false;
}
if (!createClasses())
{
error("Could not create local classes");
return false;
}
return true;
}
bool JavascriptEngine::shutdown()
{
return true;
}
/**
* Evaluate a script
*/
bool JavascriptEngine::evaluate(const DOMString &script)
{
const char *cscript = script.c_str();
int length = script.size();
jsval rval;
JSBool ret = JS_EvaluateScript(cx, globalObj,
cscript, length, "buffer",
0, &rval);
if (ret == JS_FALSE)
{
return false;
}
return true;
}
/**
* Evaluate a script from a file
*/
bool JavascriptEngine::evaluateFile(const DOMString &fileName)
{
FILE *f = fopen(fileName.c_str(), "r");
if (!f)
{
error("Could not open '%s' for reading", fileName.c_str());
return false;
}
DOMString script;
while (true)
{
int ch = fgetc(f);
if (ch < 0)
break;
script.push_back((char)ch);
}
fclose(f);
const char *cscript = script.c_str();
int length = script.size();
jsval rval;
JSBool ret = JS_EvaluateScript(cx, globalObj,
cscript, length, fileName.c_str(),
0, &rval);
if (ret == JS_FALSE)
{
return false;
}
return true;
}
/**
* Bind with the basic DOM classes
*/
bool JavascriptEngine::createClasses()
{
JavascriptDOMBinder binder(*this);
binder.createClasses();
return true;
}
} // namespace dom
} // namespace w3c
} // namespace org
//########################################################################
//# E N D O F F I L E
//########################################################################
|
