showChoices 显示选项

showChoices

类型: MethodDeclaration

所属类: CommandFunctionList

定义位置: command.ts

描述

显示选项

参数

参数名	类型	描述	默认值
\{choices, parameters\}	`{
choices: Array<any>
parameters: string
}`	-	-

返回值

类型: Array<CommandFunction>

源代码

位置: 第 1512 行

protected showChoices({choices, parameters}: {
    choices: Array<any>
    parameters: string
  }): Array<CommandFunction> {
    // 解析变量文本内容
    const method = this.showChoices as any
    let {parseVariable} = method
    if (!parseVariable) {
      const regexp = /<(local):(.*?)>|<(global):([0-9a-f]{16})>/g
      const replacer = (match: string, m1?: string, m2?: string, m3?: string, m4?: string): any => {
        const tag = m1 ?? m3!
        const key = m2 ?? m4!
        switch (tag) {
          case 'local':
            return CurrentEvent.attributes[key]?.toString()
          case 'global':
            return Variable.get(key)?.toString()
        }
      }
      const mapper = (content: string) => content.replace(regexp, replacer)
      parseVariable = method.parseVariable = (contents: Array<string>) => contents.map(mapper)
    }
    const {commands, index} = this.stack.get()
    const pop = Command.goto(commands, index + 2)
    const contents: Array<string> = []
    const branches: Array<CommandFunctionList> = []
    for (const choice of choices) {
      contents.push(choice.content)
      branches.push(Command.compile(choice.commands, pop))
    }
    const fn1 = () => {
      const list = EventManager.getEnabledEvents('showchoices')
      const fn = list.length === 0 ? Command.skip : () => {
        Command.parameters = parameters
        Command.choiceContents = parseVariable(contents)
        Command.choiceIndex = -1
        CurrentEvent.stack.push(CommandList, CommandIndex)
        for (let i = list.length - 1; i >= 1; i--) {
          CurrentEvent.stack.push(list[i], 0)
        }
        CommandList = list[0]
        CommandIndex = 0
        return true
      }
      // 编译时不能确定事件已加载，因此使用运行时编译
      return (CommandList[CommandIndex - 1] = fn)()
    }
    const fn2 = () => {
      switch (Command.choiceIndex) {
        case -1:
          return true
        default: {
          const commands = branches[Command.choiceIndex]
          if (commands) {
            CommandList = commands
            CommandIndex = 0
          }
          return true
        }
      }
    }
    return [fn1, fn2]
  }

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文档生成时间：2025/7/21 20:53:39