Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 381 insertions, 0 deletions

diff --git a/basic/source/sbx/sbxexec.cxx b/basic/source/sbx/sbxexec.cxx
new file mode 100644
index 000000000..d830061f0
--- /dev/null
+++ b/basic/source/sbx/sbxexec.cxx
@@ -0,0 +1,381 @@
+/* -*- 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 <basic/sbx.hxx>
+#include <basic/sberrors.hxx>
+#include <rtl/character.hxx>
+#include <rtl/ustrbuf.hxx>
+
+
+static SbxVariableRef Element
+    ( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf,
+      SbxClassType );
+
+static const sal_Unicode* SkipWhitespace( const sal_Unicode* p )
+{
+    while( *p && ( *p == ' ' || *p == '\t' ) )
+        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 )
+{
+    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( !rtl::isAsciiAlpha( *p ) && *p != '_' )
+        {
+            SbxBase::SetError( ERRCODE_BASIC_SYNTAX );
+        }
+        else
+        {
+            rSym = p;
+            // The it can contain alphabetic characters, numbers or underlines
+            while( *p && (rtl::isAsciiAlphanumeric( *p ) || *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 )
+{
+
+    SbxVariableRef refVar;
+    const sal_Unicode* p = SkipWhitespace( *ppBuf );
+    if( rtl::isAsciiAlpha( *p ) || *p == '_' || *p == '[' )
+    {
+        // Read in the element
+        refVar = Element( pObj, pGbl, &p, t );
+        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 );
+        }
+    }
+    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 )
+{
+    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 );
+    }
+    *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 )
+{
+    const sal_Unicode* p = *ppBuf;
+    SbxVariableRef refVar( Operand( pObj, pGbl, &p, false ) );
+    p = SkipWhitespace( p );
+    while( refVar.is() && ( *p == '*' || *p == '/' ) )
+    {
+        sal_Unicode cOp = *p++;
+        SbxVariableRef refVar2( Operand( pObj, pGbl, &p, false ) );
+        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 )
+{
+    const sal_Unicode* p = *ppBuf;
+    SbxVariableRef refVar( MulDiv( pObj, pGbl, &p ) );
+    p = SkipWhitespace( p );
+    while( refVar.is() && ( *p == '+' || *p == '-' ) )
+    {
+        sal_Unicode cOp = *p++;
+        SbxVariableRef refVar2( MulDiv( pObj, pGbl, &p ) );
+        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 )
+{
+    const sal_Unicode* p = *ppBuf;
+    SbxVariableRef refVar( Operand( pObj, pGbl, &p, true ) );
+    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 ) );
+                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 )
+{
+    OUString aSym;
+    const sal_Unicode* p = Symbol( *ppBuf, aSym );
+    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 );
+                    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 );
+    }
+    *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 );
+        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 );
+    p = SkipWhitespace( p );
+    if( *p )
+    {
+        SetError( ERRCODE_BASIC_SYNTAX );
+    }
+    return pVar.get();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */