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XKbSwitchApi.cpp
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XKbSwitchApi.cpp
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/*
* XKb Switch API for using in vim libcall()
*
* Copyright (C) 2013 by Alexei Rad'kov
* Copyright (C) 2010-2023 by Sergei Mironov
*
* 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 3 of the License, or (at your option)
* any later version.
*/
#include <algorithm>
#include "XKeyboard.hpp"
using namespace std;
using namespace kb;
namespace
{
class XKeyboardWrapper
{
public:
XKeyboardWrapper() : xkb( NULL ), unusable( false )
{}
~XKeyboardWrapper()
{
delete xkb;
}
XKeyboard * get( void )
{
if ( unusable )
return NULL;
if ( xkb )
return xkb;
try
{
xkb = new XKeyboard(0);
xkb->open_display();
}
catch( ... )
{
unusable = true;
return NULL;
}
return xkb;
}
private:
XKeyboard * xkb;
bool unusable;
} xkb;
string_vector symNames;
string_vector & getSymNames( void )
{
static bool loaded = false;
if ( loaded )
return symNames;
XKeyboard * xkb = ::xkb.get();
if ( ! xkb )
{
loaded = true;
return symNames;
}
loaded = true;
xkb->build_layout(symNames);
return symNames;
}
}
extern "C"
{
const char * Xkb_Switch_getXkbLayout( const char * /* unused */ )
{
try
{
XKeyboard * xkb = ::xkb.get();
if ( ! xkb )
return "";
string_vector & syms = getSymNames();
return syms.at( xkb->get_group() ).c_str();
}
catch( ... )
{
}
return NULL;
}
const char * Xkb_Switch_setXkbLayout( const char * newgrp )
{
try
{
XKeyboard * xkb = ::xkb.get();
if ( ! xkb )
return "";
string_vector & syms = getSymNames();
if ( newgrp == NULL || newgrp[ 0 ] == '\0' )
return NULL;
string_vector::iterator i = find( syms.begin(), syms.end(),
newgrp );
if ( i == syms.end() )
return NULL;
xkb->set_group( i - syms.begin() );
}
catch( ... )
{
}
return NULL;
}
}