# Code coverage report for pinyin/src/pinyin.js

## Statements: 92.21% (71 / 77) Branches: 80% (24 / 30) Functions: 100% (7 / 7) Lines: 92.21% (71 / 77) Ignored: none

All files » pinyin/src/ » pinyin.js

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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;