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context_tracker
contextChangeDetector.h
Go to the documentation of this file.
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/******************************************************
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* Presage, an extensible predictive text entry system
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* ---------------------------------------------------
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*
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* Copyright (C) 2008 Matteo Vescovi <matteo.vescovi@yahoo.co.uk>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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**********(*)*/
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#ifndef PRESAGE_CONTEXTCHANGEDETECTOR
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#define PRESAGE_CONTEXTCHANGEDETECTOR
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string>
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#include "../configuration.h"
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class
ContextChangeDetector
{
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public
:
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ContextChangeDetector
(
const
std::string,
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const
std::string,
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const
std::string,
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const
std::string,
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bool
);
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~ContextChangeDetector
();
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bool
context_change
(
const
std::string& past_stream)
const
;
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std::string
change
(
const
std::string& past_stream)
const
;
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std::string
get_sliding_window
()
const
;
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void
set_sliding_window_size
(
const
std::string& str);
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void
update_sliding_window
(
const
std::string& str);
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private
:
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bool
context_change_helper
(
const
std::string& str1,
const
std::string& str2)
const
;
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static
const
std::string::size_type
DEFAULT_SLIDING_WINDOW_SIZE
;
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std::string::size_type
SLIDING_WINDOW_SIZE
;
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std::string
sliding_window
;
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const
std::string
wordChars
;
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const
std::string
separatorChars
;
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const
std::string
blankspaceChars
;
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const
std::string
controlChars
;
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bool
lowercase_mode
;
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};
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#endif // PRESAGE_CONTEXTCHANGEDETECTOR
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