@dan-uni/dan-any/src/ass-gen/ass/dialogue.ts

A danmaku transformer lib, supporting danmaku from different platforms.

import type { RGB } from '../types'

import { DanmakuType } from '../types'
import { formatColor, getDecoratingColor, isWhite } from '../util'

// Dialogue: 0,0:00:00.00,0:00:08.00,R2L,,20,20,2,,{\move(622.5,25,-62.5,25)}标准小裤裤
// Dialogue: 0,0:00:08.35,0:00:12.35,Fix,,20,20,2,,{\pos(280,50)\c&HEAA000}没男主吗

const formatTime = (seconds: number) => {
  const div = (i: number, j: number) => Math.floor(i / j)
  const pad = (n: number) => (n < 10 ? `0${n}` : String(n))

  const integer = Math.floor(seconds)
  const hour = div(integer, 60 * 60)
  const minute = div(integer, 60) % 60
  const second = integer % 60
  const minorSecond = Math.floor((seconds - integer) * 100) // 取小数部分2位

  return `${hour}:${pad(minute)}:${pad(second)}.${minorSecond}`
}

const encode = (text: string) =>
  text
    .toString()
    .replaceAll('{', '｛')
    .replaceAll('}', '｝')
    .replaceAll(/\r|\n/g, '')

const scrollCommand = ({
  start,
  end,
  top,
}: {
  start: number
  end: number
  top: number
}) => `\\move(${start},${top},${end},${top})`
const fixCommand = ({ top, left }: { top: number; left: number }) =>
  `\\an8\\pos(${left},${top})`
const colorCommand = (color: RGB) => `\\c${formatColor(color)}`
const borderColorCommand = (color: RGB) => `\\3c${formatColor(color)}`

// eslint-disable-next-line import/no-default-export
export default (
  danmaku: {
    type: (typeof DanmakuType)[keyof typeof DanmakuType]
    color: RGB
    fontSizeType: number
    content: string
    time: number
    start: number
    end: number
    top: number
    left: number
  },
  config: { scrollTime: number; fixTime: number },
) => {
  const { fontSizeType, content, time } = danmaku
  const { scrollTime, fixTime } = config

  const commands = [
    danmaku.type === DanmakuType.SCROLL
      ? scrollCommand({
          start: danmaku.start,
          end: danmaku.end,
          top: danmaku.top,
        })
      : fixCommand({ top: danmaku.top, left: danmaku.left }),
    // 所有网站的原始默认色是白色，所以白色的时候不用额外加和颜色相关的指令
    isWhite(danmaku.color) ? '' : colorCommand(danmaku.color),
    isWhite(danmaku.color)
      ? ''
      : borderColorCommand(getDecoratingColor(danmaku.color)),
  ]
  const fields = [
    0, // Layer,
    formatTime(time), // Start
    formatTime(
      time + (danmaku.type === DanmakuType.SCROLL ? scrollTime : fixTime),
    ), // End
    `F${fontSizeType}`, // Style
    '', // Name
    '0000', // MarginL
    '0000', // MarginR
    '0000', // MarginV
    '', // Effect
    `{${commands.join('')}}${encode(content)}`, // Text
  ]

  return `Dialogue: ${fields.join(',')}`
}