Class KeyframesRule

packages/jss/src/plugins/keyframesRule.js:16–61

 * Rule for @keyframes
 */
export class KeyframesRule {
  type = 'keyframes'

  at = '@keyframes'

  isProcessed = false

  constructor(key, frames, options) {
    const nameMatch = key.match(nameRegExp)
    if (nameMatch && nameMatch[1]) {
      this.name = nameMatch[1]
    } else {
      this.name = 'noname'
      warning(false, `[JSS] Bad keyframes name ${key}`)
    }
    this.key = `${this.type}-${this.name}`
    this.options = options
    const {scoped, sheet, generateId} = options
    this.id = scoped === false ? this.name : escape(generateId(this, sheet))
    this.rules = new RuleList({...options, parent: this})

    for (const name in frames) {
      this.rules.add(name, frames[name], {
        ...options,
        parent: this
      })
    }

    this.rules.process()
  }

  /**
   * Generates a CSS string.
   */
  toString(options = defaultToStringOptions) {
    const {linebreak} = getWhitespaceSymbols(options)
    if (options.indent == null) options.indent = defaultToStringOptions.indent
    if (options.children == null) options.children = defaultToStringOptions.children
    if (options.children === false) {
      return `${this.at} ${this.id} {}`
    }
    let children = this.rules.toString(options)
    if (children) children = `${linebreak}${children}${linebreak}`
    return `${this.at} ${this.id} {${children}}`
  }
}

const keyRegExp = /@keyframes\s+/