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    <title>Code coverage report for music-core/models/Note.ts</title>
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        <h1><a href="../../index.html">All files</a> / <a href="index.html">music-core/models</a> Note.ts</h1>
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                <span class="strong">99.36% </span>
                <span class="quiet">Statements</span>
                <span class='fraction'>313/315</span>
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                <span class="strong">90% </span>
                <span class="quiet">Branches</span>
                <span class='fraction'>36/40</span>
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                <span class="strong">100% </span>
                <span class="quiet">Functions</span>
                <span class='fraction'>11/11</span>
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                <span class="strong">99.36% </span>
                <span class="quiet">Lines</span>
                <span class='fraction'>313/315</span>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">/**
 * @file 音符模型
 * @description 表示乐谱中的音符，包含音高、时值、连接等信息
 */
&nbsp;
import { 
  NoteType, StemDirection, BeamType, AccidentalType, 
  TieSlurType, SyllabicType, ID 
} from './types';
import { Pitch, Rest, Unpitched } from './Pitch';
&nbsp;
/**
 * 连音符（tuplet）信息
 */
export interface TimeModification {
  /** 实际演奏的音符数 */
  actualNotes: number;
  /** 等效的正常音符数 */
  normalNotes: number;
  /** 基准音符类型 */
  normalType?: NoteType;
  /** 基准音符的附点数 */
  normalDots?: number;
}
&nbsp;
/**
 * 连音线信息
 */
export interface TieInfo {
  type: TieSlurType;
  number?: number;
}
&nbsp;
/**
 * 符杠信息
 */
export interface BeamInfo {
  number: number;  // 1-8，表示第几层符杠
  type: BeamType;
}
&nbsp;
/**
 * 歌词信息
 */
export interface Lyric {
  /** 歌词编号（用于多段歌词） */
  number?: string;
  /** 音节类型 */
  syllabic?: SyllabicType;
  /** 歌词文字 */
  text: string;
  /** 是否延长 */
  extend?: boolean;
  /** 是否有省略符号 */
  elision?: boolean;
}
&nbsp;
/**
 * 装饰音信息
 */
export interface GraceNote {
  /** 是否为倚音（有时值） */
  slash?: boolean;
  /** 是否从前音偷时值 */
  stealTimePrevious?: number;
  /** 是否从后音偷时值 */
  stealTimeFollowing?: number;
  /** 制造时值 */
  makeTime?: number;
}
&nbsp;
/**
 * 音符数据接口
 */
export interface INote {
  /** 唯一标识 */
  id?: ID;
  
  // === 音高信息（三选一）===
  /** 有音高的音符 */
  pitch?: Pitch;
  /** 休止符 */
  rest?: Rest;
  /** 无固定音高（打击乐） */
  unpitched?: Unpitched;
  
  // === 时值信息 ===
  /** 时值（以 divisions 为单位） */
  duration: number;
  /** 符头类型 */
  type?: NoteType;
  /** 附点数量 */
  dots?: number;
  /** 连音符信息 */
  timeModification?: TimeModification;
  
  // === 和弦信息 ===
  /** 是否为和弦的非第一个音 */
  chord?: boolean;
  
  // === 装饰音 ===
  /** 装饰音信息 */
  grace?: GraceNote;
  /** 是否为提示音 */
  cue?: boolean;
  
  // === 连接信息 ===
  /** 连音线 */
  ties?: TieInfo[];
  /** 符杠 */
  beams?: BeamInfo[];
  
  // === 显示信息 ===
  /** 符干方向 */
  stem?: StemDirection;
  /** 临时记号 */
  accidental?: AccidentalType;
  /** 是否显示临时记号的括号 */
  accidentalBracket?: boolean;
  /** 是否为礼貌性临时记号 */
  accidentalCourtesy?: boolean;
  
  // === 声部信息 ===
  /** 声部号 */
  voice?: number;
  /** 谱表号（多谱表时） */
  staff?: number;
  
  // === 歌词 ===
  lyrics?: Lyric[];
  
  // === 乐器 ===
  instrumentId?: string;
  
  // === 其他 ===
  /** 记号（连线、演奏技法等） */
  notations?: NoteNotations;
}
&nbsp;
/**
 * 音符上的各种记号
 */
export interface NoteNotations {
  /** 连音线（视觉） */
  tied?: { type: TieSlurType; number?: number }[];
  /** 圆滑线 */
  slurs?: { type: TieSlurType; number?: number }[];
  /** 连音符括号 */
  tuplet?: { type: 'start' | 'stop'; number?: number; bracket?: boolean };
  /** 延音记号 */
  fermata?: { type?: 'upright' | 'inverted'; shape?: string };
  /** 演奏技法 */
  articulations?: string[];
  /** 装饰记号 */
  ornaments?: string[];
  /** 力度 */
  dynamics?: string[];
  /** 技术记号（指法等） */
  technical?: string[];
  /** 琶音 */
  arpeggiate?: { direction?: 'up' | 'down' };
  /** 滑音 */
  glissando?: { type: 'start' | 'stop'; lineType?: string };
  /** 滑奏 */
  slide?: { type: 'start' | 'stop'; lineType?: string };
}
&nbsp;
/**
 * 音符类
 */
export class Note implements INote {
  id?: ID;
  pitch?: Pitch;
  rest?: Rest;
  unpitched?: Unpitched;
  duration: number;
  type?: NoteType;
  dots: number;
  timeModification?: TimeModification;
  chord: boolean;
  grace?: GraceNote;
  cue: boolean;
  ties?: TieInfo[];
  beams?: BeamInfo[];
  stem?: StemDirection;
  accidental?: AccidentalType;
  accidentalBracket: boolean;
  accidentalCourtesy: boolean;
  voice: number;
  staff: number;
  lyrics?: Lyric[];
  instrumentId?: string;
  notations?: NoteNotations;
&nbsp;
  constructor(data: INote) {
    this.id = data.id;
    this.pitch = data.pitch;
    this.rest = data.rest;
    this.unpitched = data.unpitched;
    this.duration = data.duration;
    this.type = data.type;
    this.dots = data.dots ?? 0;
    this.timeModification = data.timeModification;
    this.chord = data.chord ?? false;
    this.grace = data.grace;
    this.cue = data.cue ?? false;
    this.ties = data.ties;
    this.beams = data.beams;
    this.stem = data.stem;
    this.accidental = data.accidental;
    this.accidentalBracket = data.accidentalBracket ?? false;
    this.accidentalCourtesy = data.accidentalCourtesy ?? false;
    this.voice = data.voice ?? 1;
    this.staff = data.staff ?? 1;
    this.lyrics = data.lyrics;
    this.instrumentId = data.instrumentId;
    this.notations = data.notations;
  }
&nbsp;
  /**
   * 是否为休止符
   */
  get isRest(): boolean {
    return this.rest !== undefined;
  }
&nbsp;
  /**
   * 是否为有音高的音符
   */
  get isPitched(): boolean {
    return this.pitch !== undefined;
  }
&nbsp;
  /**
   * 是否为装饰音
   */
  get isGrace(): boolean {
    return this.grace !== undefined;
  }
&nbsp;
  /**
   * 是否为和弦音
   */
  get isChordNote(): boolean {
    return this.chord;
  }
&nbsp;
  /**
   * 获取实际时值（考虑连音符）
   * @param divisions 每四分音符的divisions值
   * @returns 以四分音符为单位的时值
   */
  getActualDuration(divisions: number): number {
    if (this.isGrace) return 0;
    
    let baseDuration = this.duration / divisions;
    
    if (this.timeModification) {
      // 连音符：实际时值 = 书写时值 × (normalNotes / actualNotes)
      baseDuration = baseDuration * this.timeModification.normalNotes / this.timeModification.actualNotes;
    }
    
    return baseDuration;
  }
&nbsp;
  /**
   * 获取简谱表示
   * @param key 调号（五度圈位置）
   * @param useMovableDo 是否首调
   */
  getJianpuRepresentation(key: number = 0, useMovableDo: boolean = false): string {
    if (this.isRest) {
      return '0';
    }
    
    if (this.pitch) {
      return this.pitch.toJianpuString(key, useMovableDo);
    }
    
    if (this.unpitched) {
      return 'X';  // 打击乐
<span class="branch-0 cbranch-no" title="branch not covered" >    }</span>
<span class="cstat-no" title="statement not covered" >    </span>
<span class="cstat-no" title="statement not covered" >    return '?';</span>
  }
&nbsp;
  /**
   * 是否有连音线开始
   */
  hasTieStart(): boolean {
    return this.ties?.some(t =&gt; t.type === 'start') ?? false;
  }
&nbsp;
  /**
   * 是否有连音线结束
   */
  hasTieStop(): boolean {
    return this.ties?.some(t =&gt; t.type === 'stop') ?? false;
  }
&nbsp;
  /**
   * 克隆音符
   */
  clone(): Note {
    return new Note({
      ...this,
      pitch: this.pitch?.clone(),
      rest: this.rest ? new Rest(this.rest) : undefined,
      ties: this.<span class="branch-0 cbranch-no" title="branch not covered" >ties ? [...this.ties] : u</span>ndefined,
      beams: this.<span class="branch-0 cbranch-no" title="branch not covered" >beams ? [...this.beams] : u</span>ndefined,
      lyrics: this.lyrics ? [...this.lyrics] : undefined,
      notations: this.<span class="branch-0 cbranch-no" title="branch not covered" >notations ? { ...this.notations } : u</span>ndefined,
    });
  }
}
&nbsp;</pre></td></tr></table></pre>

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