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/*
* Copyright (C) 2013-2020 Graeme Gott <graeme@gottcode.org>
*
* This library 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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "query.h"
#include <sstream>
#include <glib.h>
using namespace WhiskerMenu;
//-----------------------------------------------------------------------------
static inline bool is_start_word(const std::string& string, std::string::size_type pos)
{
return (pos == 0) || g_unichar_isspace(g_utf8_get_char(g_utf8_prev_char(&string.at(pos))));
}
//-----------------------------------------------------------------------------
Query::Query(const std::string& query)
{
set(query);
}
//-----------------------------------------------------------------------------
unsigned int Query::match(const std::string& haystack) const
{
// Make sure haystack is longer than query
if (m_query.empty() || (m_query.length() > haystack.length()))
{
return UINT_MAX;
}
// Check if haystack begins with or is query
std::string::size_type pos = haystack.find(m_query);
if (pos == 0)
{
return (haystack.length() == m_query.length()) ? 0x4 : 0x8;
}
// Check if haystack contains query starting at a word boundary
else if ((pos != std::string::npos) && is_start_word(haystack, pos))
{
return 0x10;
}
if (m_query_words.size() > 1)
{
// Check if haystack contains query as words
std::string::size_type search_pos = 0;
for (const auto& word : m_query_words)
{
search_pos = haystack.find(word, search_pos);
if ((search_pos == std::string::npos) || !is_start_word(haystack, search_pos))
{
search_pos = std::string::npos;
break;
}
}
if (search_pos != std::string::npos)
{
return 0x20;
}
// Check if haystack contains query as words in any order
decltype(m_query_words.size()) found_words = 0;
for (const auto& word : m_query_words)
{
search_pos = haystack.find(word);
if ((search_pos != std::string::npos) && is_start_word(haystack, search_pos))
{
++found_words;
}
else
{
break;
}
}
if (found_words == m_query_words.size())
{
return 0x40;
}
}
// Check if haystack contains query
if (pos != std::string::npos)
{
return 0x80;
}
return UINT_MAX;
}
//-----------------------------------------------------------------------------
unsigned int Query::match_as_characters(const std::string& haystack) const
{
// Make sure haystack is longer than query
if (m_query.empty() || (m_query.length() > haystack.length()))
{
return UINT_MAX;
}
bool start_word = true;
const gchar* query_startwords_string = m_query.c_str();
const gchar* query_string = m_query.c_str();
for (const gchar* pos = haystack.c_str(); *pos; pos = g_utf8_next_char(pos))
{
gunichar c = g_utf8_get_char(pos);
if (start_word)
{
// Check if individual letters of query start words in haystack
if (c == g_utf8_get_char(query_startwords_string))
{
query_startwords_string = g_utf8_next_char(query_startwords_string);
}
start_word = false;
}
else if (g_unichar_isspace(c))
{
start_word = true;
}
// Check if individual letters of query are in haystack
if (c == g_utf8_get_char(query_string))
{
query_string = g_utf8_next_char(query_string);
}
}
if (!*query_startwords_string)
{
return 0x100;
}
if (!*query_string)
{
return 0x200;
}
return UINT_MAX;
}
//-----------------------------------------------------------------------------
void Query::clear()
{
m_raw_query.clear();
m_query.clear();
m_query_words.clear();
}
//-----------------------------------------------------------------------------
void Query::set(const std::string& query)
{
m_query.clear();
m_query_words.clear();
m_raw_query = query;
if (m_raw_query.empty())
{
return;
}
gchar* normalized = g_utf8_normalize(m_raw_query.c_str(), -1, G_NORMALIZE_DEFAULT);
gchar* utf8 = g_utf8_casefold(normalized, -1);
m_query = utf8;
g_free(utf8);
g_free(normalized);
std::string buffer;
std::stringstream ss(m_query);
while (ss >> buffer)
{
m_query_words.push_back(buffer);
}
}
//-----------------------------------------------------------------------------
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