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/*
* libpinyin
* Library to deal with pinyin.
*
* Copyright (C) 2011 Peng Wu <alexepico@gmail.com>
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef PINYIN_PARSER2_H
#define PINYIN_PARSER2_H
#include <glib.h>
#include "chewing_key.h"
namespace pinyin{
typedef struct {
const char * m_pinyin_str;
const char * m_chewing_str;
ChewingKey m_chewing_key;
} content_table_item_t;
typedef struct {
const char * m_pinyin_input;
guint32 m_flags;
guint16 m_table_index;
} pinyin_index_item_t;
typedef struct {
const char * m_chewing_input;
guint32 m_flags;
guint16 m_table_index;
} chewing_index_item_t;
typedef struct {
ChewingKey m_orig_key;
guint32 m_orig_freq;
ChewingKey m_first_key;
ChewingKey m_second_key;
guint32 m_new_freq;
} divided_table_item_t;
typedef struct {
ChewingKey m_orig_first_key;
ChewingKey m_orig_second_key;
guint32 m_orig_freq;
ChewingKey m_new_first_key;
ChewingKey m_new_second_key;
guint32 m_new_freq;
} resplit_table_item_t;
typedef GArray * ChewingKeyVector;
typedef GArray * ChewingKeyRestVector;
typedef GArray * ParseValueVector;
/**
* @brief Class to translate string into ChewingKey.
*/
class PinyinParser2
{
/* constructor/destructor */
public:
virtual ~PinyinParser2 () {}
/* public method */
public:
/**
* @brief Translate only one ChewingKey from a string.
*
* @param options pinyin options from pinyin_custom2.h.
* @param key stores result ChewingKey.
* @param str snput string in UTF-8 encoding, in most case this string is just a plain ASCII string.
* @param len the length of str, in number of chars rather than bytes.
*
* @return whether the entire string is parsed as one key.
*/
virtual bool parse_one_key (guint32 options, ChewingKey & key, ChewingKeyRest & key_rest, const char *str, int len) const = 0;
/**
* @brief Translate the source string into a set of ChewingKeys.
*
* @param options pinyin options from pinyin_custom2.h.
* @param keys stores result ChewingKeys.
* @param str input string in UTF-8 encoding, in most case this string is just a plain ASCII string.
* @param len the length of str, in number of chars rather than bytes.
*
* @return the number of chars were actually used.
*/
/* Note:
* the parse method will use dynamic programming to drive parse_one_key.
*/
virtual int parse (guint32 options, ChewingKeyVector & keys, ChewingKeyRestVector & key_rests, const char *str, int len) const = 0;
};
/**
* The Full Pinyin Parser which parses full pinyin string into ChewingKeys.
*/
class FullPinyinParser2 : public PinyinParser2
{
/* Note: some internal pointers to full pinyin table. */
protected:
ParseValueVector m_parse_steps;
int final_step(size_t step_len, ChewingKeyVector & keys,
ChewingKeyRestVector & key_rests) const;
public:
FullPinyinParser2 ();
virtual ~FullPinyinParser2 () {
g_array_free(m_parse_steps, TRUE);
}
virtual bool parse_one_key (guint32 options, ChewingKey & key, ChewingKeyRest & key_rest, const char *str, int len) const;
virtual int parse (guint32 options, ChewingKeyVector & keys, ChewingKeyRestVector & key_rests, const char *str, int len) const;
};
/* The valid input chars of ShuangPin is a-z and ';'
*/
class DoublePinyinParser2 : public PinyinParser2
{
/* Note: two internal pointers to double pinyin scheme table. */
public:
virtual ~DoublePinyinParser2 () {}
virtual bool parse_one_key (guint32 options, ChewingKey & key, ChewingKeyRest & key_rest, const char *str, int len) const;
virtual int parse (guint32 options, ChewingKeyVector & keys, ChewingKeyRestVector & key_rests, const char *str, int len) const;
public:
bool set_scheme (DoublePinyinScheme scheme);
};
/**
* @brief Class to parse Chewing input string
*
* Several keyboard scheme are supported:
* * ZHUYIN_ZHUYIN Parse original ZhuYin string, such as ㄅㄧㄢ
* * Chewing_STANDARD Standard ZhuYin keyboard, which maps 1 to Bo(ㄅ), q to Po(ㄆ) etc.
* * Chewing_HSU Hsu ZhuYin keyboard, which uses a-z (except q) chars.
* * Chewing_IBM IBM ZhuYin keyboard, which maps 1 to Bo(ㄅ), 2 to Po(ㄆ) etc.
* * Chewing_GIN_YIEH Gin-Yieh ZhuYin keyboard.
* * Chewing_ET Eten (倚天) ZhuYin keyboard.
* * Chewing_ET26 Eten (倚天) ZhuYin keyboard, which only uses a-z chars.
* UTF-8 string is used in ZhuYin Parser, because the requirement of supporting original ZhuYin strings.
* So that the length of inputted string is calculated in number of utf8 chars instead of bytes.
*/
class ChewingParser2 : public PinyinParser2
{
/* Note: one internal pointer to chewing scheme table. */
public:
virtual ~ChewingParser2 () {}
virtual bool parse_one_key (guint32 options, ChewingKey & key, ChewingKeyRest & key_rest, const char *str, int len) const;
virtual int parse (guint32 options, ChewingKeyVector & keys, ChewingKeyRestVector & key_rests, const char *str, int len) const;
public:
bool set_scheme (ChewingScheme scheme);
};
};
#endif
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