root/axscript/ActiveScriptError.cpp

DEFINITIONS

1. isSyntaxError
2. GetExceptionInfo
3. GetSourcePosition
4. GetSourceLineText

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is [ActiveScripting implemented with Tamarin].
 *
 * The Initial Developer of the Original Code is Mozilla Corp.
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Mark Hammond.
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "axtam.h"
#include "ActiveScriptError.h"

using namespace axtam;

bool CActiveScriptError::isSyntaxError()
{
        using namespace avmplus::NativeID;
        Traits *tse = core->toplevel->getBuiltinClass(abcclass_SyntaxError)->traits()->itraits;
        return exception->isValid() && core->istype(exception->atom, tse);
}
// IActiveScriptError
STDMETHODIMP CActiveScriptError::GetExceptionInfo( 
            /* [out] */ EXCEPINFO *pexcepinfo)
{
        if (!pexcepinfo)
                return E_POINTER;

        // SyntaxErrors don't get a stack-trace - it's just to the compiler.
        core->fillEXCEPINFO(exception, pexcepinfo, !isSyntaxError());
        return S_OK;
}

STDMETHODIMP CActiveScriptError::GetSourcePosition(
            /* [out] */ DWORD *pdwSourceContext,
            /* [out] */ ULONG *pulLineNumber,
            /* [out] */ LONG *plCharacterPosition)
{
        if (pdwSourceContext)
                *pdwSourceContext = dwSourceContextCookie;
        // WSH doesn't initialize either of these variables
        if (pulLineNumber)
                *pulLineNumber = 0;
        if (plCharacterPosition)
                *plCharacterPosition = 0;

        if (isSyntaxError()) {
                // ESC may set 'line', 'column'attributes
                if (pulLineNumber) {
                        Multiname multiname(core->publicNamespace, core->constantString("line"));
                        Atom line = core->toplevel->getproperty(exception->atom, &multiname,
                                                                core->toplevel->toVTable(exception->atom));
                        AvmAssert(line != undefinedAtom); // line can't be 0, so should exist
                        *pulLineNumber = core->toUInt32(line) - 1; // zero based, as below.
                }
                // ESC doesn't do character positions :(
                return S_OK;
        } else {
#ifdef DEBUGGER
                StackTrace *st = exception->getStackTrace();
                if (pulLineNumber && st) {
                        // although not documented as such, linenum is zero based for
                        // axscript engines - its pretty easy to demonstrate with IE.
                        *pulLineNumber = st->elements[0].linenum-1;
                }
                // No column numbers available from runtime exceptions.
                return S_OK;
#else
                return E_NOTIMPL;
#endif
        }
        AvmAssert(false); // not reached!
}

STDMETHODIMP CActiveScriptError::GetSourceLineText(
            /* [out] */ BSTR *pbstrSourceLine)
{
        return E_NOTIMPL;
}