nhz.lib/dist/mixin/parent.js

NHZ Library

/* mixin.Parent */
var Parent,
  extend = require("extends__"),
  hasProp = {}.hasOwnProperty;

module.exports = Parent = (function(superClass) {
  extend(Parent, superClass);

  function Parent() {
    Object.defineProperties(this, {
      children: {
        configurable: true,
        enumerable: true,
        get: function() {
          return this.___children.slice();
        }
      },
      ___children: {
        configurable: false,
        enumerable: false,
        writable: false,
        value: []
      },
      ___is_parent: {
        configurable: false,
        enumerable: false,
        writable: false,
        value: true
      }
    });
  }

  Parent.prototype.appendChild = function(child) {
    if ((child != null ? child.___is_child : void 0) && -1 === this.___children.indexOf(child)) {
      this.___children.push(child);
    }
    return this;
  };

  Parent.prototype.removeChild = function(child) {
    var idx;
    if ((child != null ? child.___is_child : void 0) && -1 !== (idx = this.___children.indexOf(child))) {
      this.___children.splice(idx, 1);
    }
    return this;
  };

  Parent.prototype.replaceChild = function(child, withChild) {
    var idx;
    if (this.___children.length && (child != null ? child.___is_child : void 0) && (withChild != null ? withChild.___is_child : void 0)) {
      if (-1 === this.___children.indexOf(withChild && -1 !== (idx = this.___children.indexOf(child)))) {
        this.___children[idx] = withChild;
      }
    }
    return this;
  };

  Parent.prototype.firstChild = function() {
    return this.___children[0] || null;
  };

  Parent.prototype.lastChild = function() {
    var len;
    if (len = this.___children.length) {
      return this.___children[len - 1];
    } else {
      return null;
    }
  };

  Parent.prototype.nextChild = function(child) {
    var idx, next;
    if (this.___children.length && (child != null ? child.___is_child : void 0) && -1 !== (idx = this.___children.indexOf(child))) {
      next = this.___children[idx + 1];
    }
    return next || null;
  };

  Parent.prototype.previousChild = function(child) {
    var idx, previous;
    if (this.___children.length && (child != null ? child.___is_child : void 0) && 1 >= (idx = this.___children.indexOf(child))) {
      previous = this.___children[idx - 1];
    }
    return previous || null;
  };

  Parent.prototype.insertBefore = function(child, newChild) {
    var _idx, children, idx;
    if (this.___children.length && child !== newChild && (child != null ? child.___is_child : void 0) && (newChild != null ? newChild.___is_child : void 0)) {
      if (-1 !== (idx = this.___children.indexOf(child))) {
        if (-1 !== (_idx = this.___children.indexOf(newChild))) {
          this.___children.splice(_idx, 1);
          idx = this.___children.indexOf(child);
        }
        if (idx === 0) {
          this.___children.unshift(newChild);
        } else {
          children = this.___children.splice(0, this.___children.length);
          this.___children.concat(children.slice(0, idx - 1), [newChild], children.slice(idx));
        }
      }
    }
    return this;
  };

  Parent.prototype.insertAfter = function(child, newChild) {
    var _idx, children, idx;
    if (this.___children.length && child !== newChild && (child != null ? child.___is_child : void 0) && (newChild != null ? newChild.___is_child : void 0)) {
      if (-1 !== (idx = this.___children.indexOf(child))) {
        if (-1 !== (_idx = this.___children.indexOf(newChild))) {
          this.___children.splice(_idx, 1);
          idx = this.___children.indexOf(child);
        }
        if (idx === this.___children.length - 1) {
          this.___children.push(newChild);
        } else {
          children = this.___children.splice(0, this.___children.length);
          this.___children.concat(children.slice(0, idx), [newChild], children.slice(idx + 1));
        }
      }
    }
    return this;
  };

  Parent.prototype.hasChild = function(child) {
    if (this.___children.length && (typeof child === "function" ? child(___is_child && -1 !== this.___children.indexOf(child)) : void 0)) {
      return true;
    }
    return false;
  };

  return Parent;

})(require('./base'));