utils Constants.ts

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  /**
 * 常量定义
 */

export const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';

/**
 * VexFlow兼容的CSS类名
 */
export const VEXFLOW_CSS_CLASSES = {
  NOTE: 'vf-note',
  NUMBERED_NOTE_HEAD: 'vf-numbered-note-head',
  LYRIC: 'vf-lyric',
  BEAM: 'vf-beam',
  CUSTOM_BG: 'vf-custom-bg',
  BARLINE: 'vf-barline',
  DURATION_LINE: 'vf-duration-line',
  REST: 'vf-rest',
  STEM: 'vf-stem',
} as const;

/**
 * 音高映射（简谱数字到音名）
 */
export const PITCH_MAP: { [key: number]: string } = {
  1: 'C',
  2: 'D',
  3: 'E',
  4: 'F',
  5: 'G',
  6: 'A',
  7: 'B',
};

/**
 * 音名到简谱数字映射
 */
export const NOTE_NAME_TO_PITCH: { [key: string]: number } = {
  'C': 1,
  'D': 2,
  'E': 3,
  'F': 4,
  'G': 5,
  'A': 6,
  'B': 7,
};