kicad/common/eda_pattern_match.cpp

192 lines
5.1 KiB
C++

/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2015-2017 Chris Pavlina <pavlina.chris@gmail.com>
* Copyright (C) 2015-2017 KiCad Developers, see AUTHORS.txt for contributors.
*
* 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.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <eda_pattern_match.h>
#include <wx/log.h>
#include <climits>
#include <make_unique.h>
bool EDA_PATTERN_MATCH_SUBSTR::SetPattern( const wxString& aPattern )
{
m_pattern = aPattern;
return true;
}
int EDA_PATTERN_MATCH_SUBSTR::Find( const wxString& aCandidate ) const
{
int loc = aCandidate.Find( m_pattern );
return ( loc == wxNOT_FOUND ) ? EDA_PATTERN_NOT_FOUND : loc;
}
/**
* Context class to set wx loglevel for a block, and always restore it at the end.
*/
class WX_LOGLEVEL_CONTEXT
{
wxLogLevel m_old_level;
public:
WX_LOGLEVEL_CONTEXT( wxLogLevel level )
{
m_old_level = wxLog::GetLogLevel();
wxLog::SetLogLevel( level );
}
~WX_LOGLEVEL_CONTEXT()
{
wxLog::SetLogLevel( m_old_level );
}
};
bool EDA_PATTERN_MATCH_REGEX::SetPattern( const wxString& aPattern )
{
m_pattern = aPattern;
// Evil and undocumented: wxRegEx::Compile calls wxLogError on error, even
// though it promises to just return false. Silence the error.
WX_LOGLEVEL_CONTEXT ctx( wxLOG_FatalError );
return m_regex.Compile( aPattern, wxRE_ADVANCED );
}
int EDA_PATTERN_MATCH_REGEX::Find( const wxString& aCandidate ) const
{
if( m_regex.IsValid() )
{
if( m_regex.Matches( aCandidate ) )
{
size_t start, len;
m_regex.GetMatch( &start, &len, 0 );
return ( start > INT_MAX ) ? INT_MAX : start;
}
else
{
return EDA_PATTERN_NOT_FOUND;
}
}
else
{
int loc = aCandidate.Find( m_pattern );
return ( loc == wxNOT_FOUND ) ? EDA_PATTERN_NOT_FOUND : loc;
}
}
bool EDA_PATTERN_MATCH_WILDCARD::SetPattern( const wxString& aPattern )
{
// Compile the wildcard string to a regular expression
wxString regex;
regex.Alloc( 2 * aPattern.Length() ); // no need to keep resizing, we know the size roughly
const wxString to_replace = wxT( ".*+?^${}()|[]/\\" );
for( wxString::const_iterator it = aPattern.begin(); it < aPattern.end(); ++it )
{
wxUniChar c = *it;
if( c == '?' )
{
regex += wxT( "." );
}
else if( c == '*' )
{
regex += wxT( ".*" );
}
else if( to_replace.Find( c ) != wxNOT_FOUND )
{
regex += "\\";
regex += c;
}
else
{
regex += c;
}
}
return EDA_PATTERN_MATCH_REGEX::SetPattern( regex );
}
int EDA_PATTERN_MATCH_WILDCARD::Find( const wxString& aCandidate ) const
{
return EDA_PATTERN_MATCH_REGEX::Find( aCandidate );
}
EDA_COMBINED_MATCHER::EDA_COMBINED_MATCHER( const wxString& aPattern )
: m_pattern( aPattern )
{
// Whatever syntax users prefer, it shall be matched.
AddMatcher( aPattern, std::make_unique<EDA_PATTERN_MATCH_REGEX>() );
AddMatcher( aPattern, std::make_unique<EDA_PATTERN_MATCH_WILDCARD>() );
// If any of the above matchers couldn't be created because the pattern
// syntax does not match, the substring will try its best.
AddMatcher( aPattern, std::make_unique<EDA_PATTERN_MATCH_SUBSTR>() );
}
bool EDA_COMBINED_MATCHER::Find( const wxString& aTerm, int& aMatchersTriggered, int& aPosition )
{
aPosition = EDA_PATTERN_NOT_FOUND;
aMatchersTriggered = 0;
for( auto const& matcher : m_matchers )
{
int local_find = matcher->Find( aTerm );
if ( local_find != EDA_PATTERN_NOT_FOUND )
{
aMatchersTriggered += 1;
if ( local_find < aPosition || aPosition == EDA_PATTERN_NOT_FOUND )
{
aPosition = local_find;
}
}
}
return aPosition != EDA_PATTERN_NOT_FOUND;
}
wxString const& EDA_COMBINED_MATCHER::GetPattern() const
{
return m_pattern;
}
void EDA_COMBINED_MATCHER::AddMatcher(
const wxString &aPattern,
std::unique_ptr<EDA_PATTERN_MATCH> aMatcher )
{
if ( aMatcher->SetPattern( aPattern ) )
{
m_matchers.push_back( std::move( aMatcher ) );
}
}