cione-comp-lib/es/node_modules/claygl/src/core/mixin/notifier.mjs

`$ yarn add cione-comp-lib` 或者 `$ npm i cione-comp-lib -S`

function Handler(action, context) {
  this.action = action;
  this.context = context;
}
var notifier = {
  trigger: function(name) {
    if (!this.hasOwnProperty("__handlers__")) {
      return;
    }
    if (!this.__handlers__.hasOwnProperty(name)) {
      return;
    }
    var hdls = this.__handlers__[name];
    var l = hdls.length, i = -1, args = arguments;
    switch (args.length) {
      case 1:
        while (++i < l) {
          hdls[i].action.call(hdls[i].context);
        }
        return;
      case 2:
        while (++i < l) {
          hdls[i].action.call(hdls[i].context, args[1]);
        }
        return;
      case 3:
        while (++i < l) {
          hdls[i].action.call(hdls[i].context, args[1], args[2]);
        }
        return;
      case 4:
        while (++i < l) {
          hdls[i].action.call(hdls[i].context, args[1], args[2], args[3]);
        }
        return;
      case 5:
        while (++i < l) {
          hdls[i].action.call(hdls[i].context, args[1], args[2], args[3], args[4]);
        }
        return;
      default:
        while (++i < l) {
          hdls[i].action.apply(hdls[i].context, Array.prototype.slice.call(args, 1));
        }
        return;
    }
  },
  on: function(name, action, context) {
    if (!name || !action) {
      return;
    }
    var handlers = this.__handlers__ || (this.__handlers__ = {});
    if (!handlers[name]) {
      handlers[name] = [];
    } else {
      if (this.has(name, action)) {
        return;
      }
    }
    var handler = new Handler(action, context || this);
    handlers[name].push(handler);
    return this;
  },
  once: function(name, action, context) {
    if (!name || !action) {
      return;
    }
    var self = this;
    function wrapper() {
      self.off(name, wrapper);
      action.apply(this, arguments);
    }
    return this.on(name, wrapper, context);
  },
  before: function(name, action, context) {
    if (!name || !action) {
      return;
    }
    name = "before" + name;
    return this.on(name, action, context);
  },
  after: function(name, action, context) {
    if (!name || !action) {
      return;
    }
    name = "after" + name;
    return this.on(name, action, context);
  },
  success: function(action, context) {
    return this.once("success", action, context);
  },
  error: function(action, context) {
    return this.once("error", action, context);
  },
  off: function(name, action) {
    var handlers = this.__handlers__ || (this.__handlers__ = {});
    if (!action) {
      handlers[name] = [];
      return;
    }
    if (handlers[name]) {
      var hdls = handlers[name];
      var retains = [];
      for (var i = 0; i < hdls.length; i++) {
        if (action && hdls[i].action !== action) {
          retains.push(hdls[i]);
        }
      }
      handlers[name] = retains;
    }
    return this;
  },
  has: function(name, action) {
    var handlers = this.__handlers__;
    if (!handlers || !handlers[name]) {
      return false;
    }
    var hdls = handlers[name];
    for (var i = 0; i < hdls.length; i++) {
      if (hdls[i].action === action) {
        return true;
      }
    }
  }
};
var notifier$1 = notifier;
export { notifier$1 as default };