1 files changed, 197 insertions, 0 deletions
diff --git a/kommander/widget/parser.h b/kommander/widget/parser.h
new file mode 100644
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+++ b/kommander/widget/parser.h
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+/***************************************************************************
+                    parser.h - Internal parser
+                             -------------------
+    copyright          : (C) 2004      Michal Rudolf <[email protected]>
+    
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef _HAVE_PARSER_H_
+#define _HAVE_PARSER_H_
+
+#include "kommander_export.h"
+#include "parsenode.h"
+
+#include <qvaluevector.h>
+#include <qstringlist.h>
+#include <qmap.h>
+
+class KommanderWidget;
+class ParserData;
+
+class Parser
+{
+public:
+  Parser(ParserData* data);
+  Parser(ParserData* data, const QString& expr);
+  // set string to parse
+  bool setString(const QString& s);
+  // set Kommander widget associated with parser
+  void setWidget(KommanderWidget* w);
+
+  // parse generic expression
+  QString expression(Parse::Mode mode = Parse::Execute);
+  // execute single command; return true if ok
+  bool command(Parse::Mode mode = Parse::Execute);
+  // special class method to execute single parser function without creating parser object
+  static QString function(ParserData* data, const QString& name, const QStringList& params);
+  // execute whole block; return true if ok
+  bool parse(Parse::Mode mode = Parse::Execute);
+  // return line of errorneous node
+  int errorLine() const;
+  // return error message
+  QString errorMessage() const;
+
+  // check if this is a name of standard variable
+  bool isVariable(const QString& name) const;
+  // set variable value
+  void setVariable(const QString& name, ParseNode value);
+  // unset variable
+  void unsetVariable(const QString& key);
+  // get variable value
+  ParseNode variable(const QString& name) const;
+  // access associative array 
+  const QMap<QString, ParseNode>& array(const QString& name) const;
+  // check if this is a name of an array
+  bool isArray(const QString& name) const;
+  // set array key
+  void setArray(const QString& name, const QString& key, ParseNode value);
+  // unset array key or whole array
+  void unsetArray(const QString& name, const QString& key = QString::null);
+  // array value 
+  ParseNode arrayValue(const QString& name, const QString& key) const;
+  // access 2D array 
+  const QMap<QString, QMap<QString, ParseNode> >& matrix(const QString& name) const;
+  // check if this is name of a 2D array
+  bool isMatrix(const QString& name) const;
+  // set array key
+  void setMatrix(const QString& name, const QString& keyr, const QString& keyc, ParseNode value);
+  // unset array key or whole array
+  void unsetMatrix(const QString& name, const QString& keyr = QString::null, const QString& keyc = QString::null);
+  // array value 
+  ParseNode matrixValue(const QString& name, const QString& keyr, const QString& keyc) const;
+  // get associated widget
+  KommanderWidget* currentWidget() const;
+
+private:
+  // parsing function - top-down approach
+
+  // parse const
+  ParseNode parseConstant(Parse::Mode mode = Parse::Execute);
+  // parse value (literal or variable)
+  ParseNode parseValue(Parse::Mode mode = Parse::Execute);
+  // parse multiplication, division and mod (x*y, x/y, x%y)
+  ParseNode parseMultiply(Parse::Mode mode = Parse::Execute);
+  // parse sum (x+y, x-y)
+  ParseNode parseAdd(Parse::Mode mode = Parse::Execute);
+  // parse signed numeric (+x, -x)
+  ParseNode parseSignedNumber(Parse::Mode mode = Parse::Execute);
+
+  /*  
+  // parse string expression
+  ParseNode parseStringValue(Parse::Mode mode = Parse::Execute);
+  // parse string concatenation (x+y)
+  ParseNode parseConcatenation(Parse::Mode mode = Parse::Execute);
+  */
+
+  // parse comparisons (x==y, x<y, x>y, x!=y, x<>y, x<=y, x>=y
+  ParseNode parseComparison(Parse::Mode mode = Parse::Execute);
+  // parse boolean not (!x, not x)
+  ParseNode parseNot(Parse::Mode mode = Parse::Execute);
+  // parse boolean and (x&&y, x and y)
+  ParseNode parseAnd(Parse::Mode mode = Parse::Execute);
+  // parse boolean or (x||y, x or y)
+  ParseNode parseOr(Parse::Mode mode = Parse::Execute);
+  // parse generic condition
+  ParseNode parseCondition(Parse::Mode mode = Parse::Execute);
+
+  // parse (x) expression
+  ParseNode parseParenthesis(Parse::Mode mode = Parse::Execute);
+  // parse generic expression
+  ParseNode parseExpression(Parse::Mode mode = Parse::Execute);
+  // parse parameters
+  ParseNode parseFunction(Parse::Mode mode = Parse::Execute);
+  // parse widget function
+  ParseNode parseWidget(Parse::Mode mode = Parse::Execute, const QString &widgetName = QString::null);
+
+  // parse assignment
+  ParseNode parseAssignment(Parse::Mode mode = Parse::Execute);
+  // parse conditional
+  Parse::Flow parseIf(Parse::Mode mode = Parse::Execute);
+  // parse assignment
+  Parse::Flow parseCommand(Parse::Mode mode = Parse::Execute);
+  // parse while loop
+  Parse::Flow parseWhile(Parse::Mode mode = Parse::Execute);
+  // parse for loop
+  Parse::Flow parseFor(Parse::Mode mode = Parse::Execute);
+  // parse foreach loop
+  Parse::Flow parseForeach(Parse::Mode mode = Parse::Execute);
+  // parse switch block
+  void parseSwitch(Parse::Mode mode = Parse::Execute);
+  // parse whole block
+  Parse::Flow parseBlock(Parse::Mode mode = Parse::Execute);
+
+  // insert next node
+  void insertNode(ParseNode p, int line);
+  // next item to be parsed
+  ParseNode next() const;
+  // next is Else or Else && If?
+  bool nextElseIf();
+  // check if next item is keyword k, if so - go further, if no, set error
+  bool tryKeyword(Parse::Keyword k, Parse::Mode mode = Parse::Execute);
+  // check if next item is a variable, if so, return its name
+  bool tryVariable(Parse::Mode mode = Parse::Execute);
+
+  // get the name of the next node treated as variable
+  QString nextVariable(Parse::Mode mode = Parse::Execute);
+  // check whether variable/array name is global (preceded with _)
+  bool isGlobal(const QString& name) const;
+  // check if next item is a function
+  bool isFunction() const;
+  // check if next item is a widget
+  bool isWidget() const;
+
+  // reset to default state
+  void reset();
+  // set error state if no error was set before; err is expected symbol that wasn't found
+  void setError(const QString& msg);
+  void setError(const QString& msg, int pos);
+  // check whether parsing was successful
+  bool isError() const;
+
+  // parsing data
+  ParserData* m_data;
+  // current parsing position
+  uint m_start;
+  // current error message
+  QString m_error;
+  // in case of error, this keeps position of first error
+  uint m_errorPosition;
+  // parsing nodes
+  QValueVector<ParseNode> m_parts;
+  // variables
+  QMap<QString, ParseNode> m_variables;
+  // arrays
+  QMap<QString, QMap<QString, ParseNode> > m_arrays;
+  // 2D arrays
+  QMap<QString, QMap<QString, QMap<QString, ParseNode> > > m_matrices;
+  // Kommander 
+  KommanderWidget* m_widget;
+  // global variables
+  static QMap<QString, ParseNode> m_globalVariables;
+  // global arrays
+  static QMap<QString, QMap<QString, ParseNode> > m_globalArrays;
+  // global 2D arrays
+  static QMap<QString, QMap<QString, QMap<QString, ParseNode> > > m_globalMatrices;
+};
+
+#endif
+