office-gobmx/basic/source/sbx/sbxexec.cxx
Mike Kaganski 527741d528 Related: tdf#153752 Use virtual method to avoid dynamic casts
Change-Id: I97c09d82699621d5a43a525b5f2cf75ff5d131c0
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/147353
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
2023-02-21 05:52:59 +00:00

391 lines
11 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/config.h>
#include <basic/sbx.hxx>
#include <basic/sberrors.hxx>
#include <rtl/character.hxx>
#include <rtl/ustrbuf.hxx>
#include <basiccharclass.hxx>
static SbxVariableRef Element
( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf,
SbxClassType, bool bCompatible );
static const sal_Unicode* SkipWhitespace( const sal_Unicode* p )
{
while( BasicCharClass::isWhitespace(*p) )
p++;
return p;
}
// Scanning of a symbol. The symbol were inserted in rSym, the return value
// is the new scan position. The symbol is at errors empty.
static const sal_Unicode* Symbol( const sal_Unicode* p, OUString& rSym, bool bCompatible )
{
sal_uInt16 nLen = 0;
// Did we have a nonstandard symbol?
if( *p == '[' )
{
rSym = ++p;
while( *p && *p != ']' )
{
p++;
nLen++;
}
p++;
}
else
{
// A symbol had to begin with an alphabetic character or an underline
if( !BasicCharClass::isAlpha( *p, bCompatible ) && *p != '_' )
{
SbxBase::SetError( ERRCODE_BASIC_SYNTAX );
}
else
{
rSym = p;
// The it can contain alphabetic characters, numbers or underlines
while( *p && (BasicCharClass::isAlphaNumeric( *p, bCompatible ) || *p == '_') )
{
p++;
nLen++;
}
// Ignore standard BASIC suffixes
if( *p && (*p == '%' || *p == '&' || *p == '!' || *p == '#' || *p == '$' ) )
{
p++;
}
}
}
rSym = rSym.copy( 0, nLen );
return p;
}
// Qualified name. Element.Element...
static SbxVariableRef QualifiedName
( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf, SbxClassType t, bool bCompatible )
{
SbxVariableRef refVar;
const sal_Unicode* p = SkipWhitespace( *ppBuf );
if( BasicCharClass::isAlpha( *p, bCompatible ) || *p == '_' || *p == '[' )
{
// Read in the element
refVar = Element( pObj, pGbl, &p, t, bCompatible );
while( refVar.is() && (*p == '.' || *p == '!') )
{
// It follows still an objectelement. The current element
// had to be a SBX-Object or had to deliver such an object!
pObj = dynamic_cast<SbxObject*>( refVar.get() );
if( !pObj )
// Then it had to deliver an object
pObj = dynamic_cast<SbxObject*>( refVar->GetObject() );
refVar.clear();
if( !pObj )
break;
p++;
// And the next element please
refVar = Element( pObj, pGbl, &p, t, bCompatible );
}
}
else
SbxBase::SetError( ERRCODE_BASIC_SYNTAX );
*ppBuf = p;
return refVar;
}
// Read in of an operand. This could be a number, a string or
// a function (with optional parameters).
static SbxVariableRef Operand
( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf, bool bVar, bool bCompatible )
{
SbxVariableRef refVar( new SbxVariable );
const sal_Unicode* p = SkipWhitespace( *ppBuf );
if( !bVar && ( rtl::isAsciiDigit( *p )
|| ( *p == '.' && rtl::isAsciiDigit( *( p+1 ) ) )
|| *p == '-'
|| *p == '&' ) )
{
// A number could be scanned in directly!
sal_uInt16 nLen;
if( !refVar->Scan( OUString( p ), &nLen ) )
{
refVar.clear();
}
else
{
p += nLen;
}
}
else if( !bVar && *p == '"' )
{
// A string
OUStringBuffer aString;
p++;
for( ;; )
{
// This is perhaps an error
if( !*p )
{
return nullptr;
}
// Double quotes are OK
if( *p == '"' && (*++p) != '"' )
{
break;
}
aString.append(*p++);
}
refVar->PutString( aString.makeStringAndClear() );
}
else
{
refVar = QualifiedName( pObj, pGbl, &p, SbxClassType::DontCare, bCompatible );
}
*ppBuf = p;
return refVar;
}
// Read in of a simple term. The operands +, -, * and /
// are supported.
static SbxVariableRef MulDiv( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf, bool bCompatible )
{
const sal_Unicode* p = *ppBuf;
SbxVariableRef refVar( Operand( pObj, pGbl, &p, false, bCompatible ) );
p = SkipWhitespace( p );
while( refVar.is() && ( *p == '*' || *p == '/' ) )
{
sal_Unicode cOp = *p++;
SbxVariableRef refVar2( Operand( pObj, pGbl, &p, false, bCompatible ) );
if( refVar2.is() )
{
// temporary variable!
SbxVariable* pVar = refVar.get();
pVar = new SbxVariable( *pVar );
refVar = pVar;
if( cOp == '*' )
*refVar *= *refVar2;
else
*refVar /= *refVar2;
}
else
{
refVar.clear();
break;
}
}
*ppBuf = p;
return refVar;
}
static SbxVariableRef PlusMinus( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf, bool bCompatible )
{
const sal_Unicode* p = *ppBuf;
SbxVariableRef refVar( MulDiv( pObj, pGbl, &p, bCompatible ) );
p = SkipWhitespace( p );
while( refVar.is() && ( *p == '+' || *p == '-' ) )
{
sal_Unicode cOp = *p++;
SbxVariableRef refVar2( MulDiv( pObj, pGbl, &p, bCompatible ) );
if( refVar2.is() )
{
// temporary Variable!
SbxVariable* pVar = refVar.get();
pVar = new SbxVariable( *pVar );
refVar = pVar;
if( cOp == '+' )
*refVar += *refVar2;
else
*refVar -= *refVar2;
}
else
{
refVar.clear();
break;
}
}
*ppBuf = p;
return refVar;
}
static SbxVariableRef Assign( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf, bool bCompatible )
{
const sal_Unicode* p = *ppBuf;
SbxVariableRef refVar( Operand( pObj, pGbl, &p, true, bCompatible ) );
p = SkipWhitespace( p );
if( refVar.is() )
{
if( *p == '=' )
{
// Assign only onto properties!
if( refVar->GetClass() != SbxClassType::Property )
{
SbxBase::SetError( ERRCODE_BASIC_BAD_ACTION );
refVar.clear();
}
else
{
p++;
SbxVariableRef refVar2( PlusMinus( pObj, pGbl, &p, bCompatible ) );
if( refVar2.is() )
{
SbxVariable* pVar = refVar.get();
SbxVariable* pVar2 = refVar2.get();
*pVar = *pVar2;
pVar->SetParameters( nullptr );
}
}
}
else
// Simple call: once activating
refVar->Broadcast( SfxHintId::BasicDataWanted );
}
*ppBuf = p;
return refVar;
}
// Read in of an element. This is a symbol, optional followed
// by a parameter list. The symbol will be searched in the
// specified object and the parameter list will be attached if necessary.
static SbxVariableRef Element
( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf,
SbxClassType t, bool bCompatible )
{
OUString aSym;
const sal_Unicode* p = Symbol( *ppBuf, aSym, bCompatible );
SbxVariableRef refVar;
if( !aSym.isEmpty() )
{
SbxFlagBits nOld = pObj->GetFlags();
if( pObj == pGbl )
{
pObj->SetFlag( SbxFlagBits::GlobalSearch );
}
refVar = pObj->Find( aSym, t );
pObj->SetFlags( nOld );
if( refVar.is() )
{
refVar->SetParameters( nullptr );
// Follow still parameter?
p = SkipWhitespace( p );
if( *p == '(' )
{
p++;
auto refPar = tools::make_ref<SbxArray>();
sal_uInt32 nArg = 0;
// We are once relaxed and accept as well
// the line- or command end as delimiter
// Search parameter always global!
while( *p && *p != ')' && *p != ']' )
{
SbxVariableRef refArg = PlusMinus( pGbl, pGbl, &p, bCompatible );
if( !refArg.is() )
{
// Error during the parsing
refVar.clear(); break;
}
else
{
// One copies the parameter, so that
// one have the current status (triggers also
// the call per access)
refPar->Put(new SbxVariable(*refArg), ++nArg);
}
p = SkipWhitespace( p );
if( *p == ',' )
p++;
}
if( *p == ')' )
p++;
if( refVar.is() )
refVar->SetParameters( refPar.get() );
}
}
else
SbxBase::SetError( ERRCODE_BASIC_NO_METHOD, aSym );
}
*ppBuf = p;
return refVar;
}
// Mainroutine
SbxVariable* SbxObject::Execute( const OUString& rTxt )
{
SbxVariableRef pVar;
const sal_Unicode* p = rTxt.getStr();
for( ;; )
{
p = SkipWhitespace( p );
if( !*p )
{
break;
}
if( *p++ != '[' )
{
SetError( ERRCODE_BASIC_SYNTAX ); break;
}
pVar = Assign( this, this, &p, IsOptionCompatible() );
if( !pVar.is() )
{
break;
}
p = SkipWhitespace( p );
if( *p++ != ']' )
{
SetError( ERRCODE_BASIC_SYNTAX ); break;
}
}
return pVar.get();
}
SbxVariable* SbxObject::FindQualified( const OUString& rName, SbxClassType t )
{
SbxVariableRef pVar;
const sal_Unicode* p = rName.getStr();
p = SkipWhitespace( p );
if( !*p )
{
return nullptr;
}
pVar = QualifiedName( this, this, &p, t, IsOptionCompatible() );
p = SkipWhitespace( p );
if( *p )
{
SetError( ERRCODE_BASIC_SYNTAX );
}
return pVar.get();
}
bool SbxObject::IsOptionCompatible() const
{
if (const SbxObject* pObj = GetParent())
return pObj->IsOptionCompatible();
return false;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */