Starmath now allows multiple parsers second part

Uses AbstractSmParser as base for SmParser
Renames parse._xx as parse5._xx
rename of parse._xx is not recognized, so clang-formated
New parse.hxx as a future mean to get the parser.

Change-Id: I122c1fda0144a24316948fcc125e60ed1a130bcb
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/111243
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 122 insertions, 0 deletions

diff --git a/starmath/inc/parsebase.hxx b/starmath/inc/parsebase.hxx
new file mode 100644
index 000000000000..ee6a0621b0d6
--- /dev/null
+++ b/starmath/inc/parsebase.hxx
@@ -0,0 +1,122 @@
+/* -*- 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 .
+ */
+
+/** Parses the starmath code and creates the nodes.
+  *
+  */
+
+#ifndef INCLUDED_STARMATH_INC_PARSEBASE_HXX
+#define INCLUDED_STARMATH_INC_PARSEBASE_HXX
+
+#include <unotools/charclass.hxx>
+#include <memory>
+#include <set>
+#include <vector>
+
+#include "token.hxx"
+#include "node.hxx"
+
+#define DEPTH_LIMIT 1024
+
+// Those are the errors that the parser may encounter.
+enum class SmParseError : uint_fast8_t
+{
+    None = 0,
+    UnexpectedChar = 1,
+    UnexpectedToken = 2,
+    PoundExpected = 3,
+    ColorExpected = 4,
+    LgroupExpected = 5,
+    RgroupExpected = 6,
+    LbraceExpected = 7,
+    RbraceExpected = 8,
+    ParentMismatch = 9,
+    RightExpected = 10,
+    FontExpected = 11,
+    SizeExpected = 12,
+    DoubleAlign = 13,
+    DoubleSubsupscript = 14,
+    NumberExpected = 15
+};
+
+struct SmErrorDesc
+{
+    SmParseError m_eType;
+    SmNode* m_pNode;
+    OUString m_aText;
+
+    SmErrorDesc(SmParseError eType, SmNode* pNode, OUString aText)
+        : m_eType(eType)
+        , m_pNode(pNode)
+        , m_aText(aText)
+    {
+    }
+};
+
+class DepthProtect
+{
+private:
+    sal_Int32& m_rParseDepth;
+
+public:
+    DepthProtect(sal_Int32& rParseDepth)
+        : m_rParseDepth(rParseDepth)
+    {
+        ++m_rParseDepth;
+        if (m_rParseDepth > DEPTH_LIMIT)
+            throw std::range_error("parser depth limit");
+    }
+    ~DepthProtect() { --m_rParseDepth; }
+};
+
+namespace starmathdatabase
+{
+// Must be in sync with SmParseError list
+extern const char* SmParseErrorDesc[16];
+
+OUString getParseErrorDesc(SmParseError err);
+}
+
+class AbstractSmParser
+{
+public:
+    AbstractSmParser() {}
+    virtual ~AbstractSmParser() {}
+
+    /** Parse rBuffer to formula tree */
+    virtual std::unique_ptr<SmTableNode> Parse(const OUString& rBuffer) = 0;
+    /** Parse rBuffer to formula subtree that constitutes an expression */
+    virtual std::unique_ptr<SmNode> ParseExpression(const OUString& rBuffer) = 0;
+
+    virtual const OUString& GetText() const = 0;
+
+    virtual bool IsImportSymbolNames() const = 0;
+    virtual void SetImportSymbolNames(bool bVal) = 0;
+    virtual bool IsExportSymbolNames() const = 0;
+    virtual void SetExportSymbolNames(bool bVal) = 0;
+
+    virtual const SmErrorDesc* NextError() = 0;
+    virtual const SmErrorDesc* PrevError() = 0;
+    virtual const SmErrorDesc* GetError() const = 0;
+    virtual const std::set<OUString>& GetUsedSymbols() const = 0;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */