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diff --git a/interfaces/tdetexteditor/variableinterface.h b/interfaces/tdetexteditor/variableinterface.h
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+/*
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License version 2 as published by the Free Software Foundation.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+
+    ---
+    Copyright (C) 2004, Anders Lund <[email protected]>
+*/
+#ifndef _KTEXTEDITOR_VARIABLE_INTERFACE_H_
+#define _KTEXTEDITOR_VARIABLE_INTERFACE_H_
+
+#include <tdelibs_export.h>
+
+class TQString;
+
+namespace KTextEditor {
+
+/**
+ * This interface is designed to provide access to "document variables",
+ * for example variables defined in files like "kate: variable value;"
+ * or the emacs style "-*- variable: value -*-".
+ *
+ * The purpose is to allow KTE plugins to use variables.
+ * A document implementing this interface should return values for variable
+ * that it does not otherwise know how to use, since they could be of interrest
+ * to plugins. A document implementing this interface must emit the variableChanged()
+ * signal whenever a variable is set that it will return a value for.
+ *
+ * @short KTextEditor interface to Document Variables
+ */
+class KTEXTEDITOR_EXPORT VariableInterface
+{
+  public:
+    VariableInterface();
+    virtual ~VariableInterface();
+
+    unsigned int variableInterfaceNumber();
+
+    /**
+    * @return the value of the variable @p name, or an empty string if the
+    * variable is not set or has no value.
+    */
+    virtual TQString variable( const TQString &name ) const = 0;
+
+    //
+    // signals!!
+    //
+  public:
+    /**
+    * Signal: emitted when a variable is set
+    */
+    virtual void variableChanged( const TQString &variable, const TQString &value ) = 0;
+
+  private:
+    static unsigned int globalVariableInterfaceNumber;
+    unsigned int myVariableInterfaceNumber;
+};
+
+
+KTEXTEDITOR_EXPORT VariableInterface *variableInterface( class Document * );
+} // namespace KTextEditor
+#endif //_KTEXTEDITOR_VARIABLE_INTERFACE_H_