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119 lines
3.7 KiB
C++
119 lines
3.7 KiB
C++
/*
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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---
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Copyright (C) 2004, Anders Lund <anders@alweb.dk>
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Copyright (C) 2005 Dominik Haumann (dhdev@gmx.de) (documentation)
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*/
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#ifndef _KTEXTEDITOR_VARIABLE_INTERFACE_H_
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#define _KTEXTEDITOR_VARIABLE_INTERFACE_H_
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#include <ktexteditor/ktexteditor_export.h>
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#include <QtCore/QObject>
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class QString;
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namespace KTextEditor {
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class Document;
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/**
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* \brief Variable/Modeline extension interface for the Document.
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*
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* \ingroup kte_group_doc_extensions
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*
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* \section variface_intro Introduction
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*
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* The VariableInterface is designed to provide access to so called
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* "document variables" (also called modelines), for example variables
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* defined in files like "kate: variable value;" or the emacs style
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* "-*- variable: value -*-".
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*
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* The idea is to allow KTextEditor plugins and applications to use document
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* variables. A document implementing this interface should return values
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* for variables that it does not otherwise know how to use, since they
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* could be of interest for plugins. A Document implementing this interface
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* must emit the signal variableChanged() whenever a variable/value pair was
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* set, changed or removed.
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*
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* \note Implementations should check the document variables whenever the
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* document was saved or loaded.
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*
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* \section variface_access Accessing the VariableInterface
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*
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* The VariableInterface is an extension interface for a
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* Document, i.e. the Document inherits the interface \e provided that the
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* used KTextEditor library implements the interface. Use qobject_cast to
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* access the interface:
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* \code
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* // doc is of type KTextEditor::Document*
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* KTextEditor::VariableInterface *iface =
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* qobject_cast<KTextEditor::VariableInterface*>( doc );
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*
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* if( iface ) {
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* // the implementation supports the interface
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* // do stuff
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* }
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* \endcode
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*
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* \see KTextEditor::Document, KTextEditor::Plugin
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* \author Anders Lund \<anders@alweb.dk\>
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*/
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class KTEXTEDITOR_EXPORT VariableInterface
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{
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public:
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VariableInterface();
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/**
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* Virtual destructor.
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*/
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virtual ~VariableInterface();
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/**
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* Get the value of the variable \p name.
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* \return the value or an empty string if the variable is not set or has
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* no value.
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*/
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virtual QString variable( const QString &name ) const = 0;
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//
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// signals!!
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//
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public:
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/**
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* The \p document emits this signal whenever the \p value of the
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* \p variable changed, this includes when a variable was initially set.
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* \param document document that emitted the signal
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* \param variable variable that changed
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* \param value new value for \e variable
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* \see variable()
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*/
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virtual void variableChanged( Document* document, const QString &variable, const QString &value ) = 0;
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private:
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class VariableInterfacePrivate* const d;
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};
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} // namespace KTextEditor
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Q_DECLARE_INTERFACE(KTextEditor::VariableInterface, "org.kde.KTextEditor.VariableInterface")
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#endif
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// kate: space-indent on; indent-width 2; replace-tabs on;
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