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| "use strict";
var PINYIN_DICT = {};
var utils = require("./utils");
var PINYIN_STYLE = utils.PINYIN_STYLE;
// 声母表。
var INITIALS = "b,p,m,f,d,t,n,l,g,k,h,j,q,x,r,zh,ch,sh,z,c,s".split(",");
// 韵母表。
//var FINALS = "ang,eng,ing,ong,an,en,in,un,er,ai,ei,ui,ao,ou,iu,ie,ve,a,o,e,i,u,v".split(",");
// 带音标字符。
var PHONETIC_SYMBOL = require("./phonetic-symbol.js");
var re_phonetic_symbol_source = "";
for(var k in PHONETIC_SYMBOL){
re_phonetic_symbol_source += k;
}
var RE_PHONETIC_SYMBOL = new RegExp("([" + re_phonetic_symbol_source + "])", "g");
var RE_TONE2 = /([aeoiuvnm])([0-4])$/;
// 修改拼音词库表中的格式。
// @param {String} pinyin, 单个拼音。
// @param {PINYIN_STYLE} style, 拼音风格。
// @return {String}
function toFixed(pinyin, style){
var tone = ""; // 声调。
switch(style){
case PINYIN_STYLE.INITIALS:
return initials(pinyin);
case PINYIN_STYLE.FIRST_LETTER:
var first_letter = pinyin.charAt(0);
if(PHONETIC_SYMBOL.hasOwnProperty(first_letter)){
first_letter = PHONETIC_SYMBOL[first_letter].charAt(0);
}
return first_letter;
case PINYIN_STYLE.NORMAL:
return pinyin.replace(RE_PHONETIC_SYMBOL, function($0, $1_phonetic){
return PHONETIC_SYMBOL[$1_phonetic].replace(RE_TONE2, "$1");
});
case PINYIN_STYLE.TONE2:
var py = pinyin.replace(RE_PHONETIC_SYMBOL, function($0, $1){
// 声调数值。
tone = PHONETIC_SYMBOL[$1].replace(RE_TONE2, "$2");
return PHONETIC_SYMBOL[$1].replace(RE_TONE2, "$1");
});
return py + tone;
case PINYIN_STYLE.TONE:
default:
return pinyin;
}
}
// 单字拼音转换。
// @param {String} han, 单个汉字
// @return {Array} 返回拼音列表，多音字会有多个拼音项。
function single_pinyin(han, options){
Iif(typeof han !== "string"){
return [];
}
Iif(han.length !== 1){
return single_pinyin(han.charAt(0), options);
}
var hanCode = han.charCodeAt(0);
Iif(!PINYIN_DICT[hanCode]){
return [han];
}
var pys = PINYIN_DICT[hanCode].split(",");
if(!options.heteronym){
return [toFixed(pys[0], options.style)];
}
// 临时存储已存在的拼音，避免多音字拼音转换为非注音风格出现重复。
var py_cached = {};
var pinyins = [];
for(var i = 0, py, l = pys.length; i < l; i++){
py = toFixed(pys[i], options.style);
if(py_cached.hasOwnProperty(py)){
continue;
}
py_cached[py] = py;
pinyins.push(py);
}
return pinyins;
}
// @param {String} hans 要转为拼音的目标字符串（汉字）。
// @param {Object} options, 可选，用于指定拼音风格，是否启用多音字。
// @return {Array} 返回的拼音列表。
function pinyin(hans, options){
Iif(typeof hans !== "string"){
return [];
}
options = utils.extend(utils.DEFAULT_OPTIONS, options || {});
var pys = [];
for(var i = 0, nohans = "", firstCharCode, words, l = hans.length; i < l; i++){
words = hans[i];
firstCharCode = words.charCodeAt(0);
if(PINYIN_DICT[firstCharCode]){
// ends of non-chinese words.
Iif(nohans.length > 0){
pys.push([nohans]);
nohans = ""; // reset non-chinese words.
}
pys.push(single_pinyin(words, options));
}else{
nohans += words;
}
}
// 清理最后的非中文字符串。
if(nohans.length > 0){
pys.push([nohans]);
nohans = ""; // reset non-chinese words.
}
return pys;
}
// 格式化为声母(Initials)、韵母(Finals)。
// @param {String}
// @return {String}
function initials(pinyin) {
for (var i = 0, l = INITIALS.length; i < l; i++){
if (pinyin.indexOf(INITIALS[i]) === 0) {
return INITIALS[i];
}
}
return "";
}
pinyin.STYLE_NORMAL = PINYIN_STYLE.NORMAL;
pinyin.STYLE_TONE = PINYIN_STYLE.TONE;
pinyin.STYLE_TONE2 = PINYIN_STYLE.TONE2;
pinyin.STYLE_INITIALS = PINYIN_STYLE.INITIALS;
pinyin.STYLE_FIRST_LETTER = PINYIN_STYLE.FIRST_LETTER;
pinyin.toFixed = toFixed;
pinyin.setDict = function(dict) {
PINYIN_DICT = dict;
};
module.exports = pinyin;
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