radio/libjs/wContainer/abstractlist.js

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2018-08-04 21:46:25 +00:00
"use strict";
var Class = require("../utils/class");
var AbstractList = Class.inherit({
"className": "AbstractList",
"constructor": function(owning) {
Class.fn.constructor.call(this);
if (!this.constructor.dataType) {
throw new Error("An attempt to instantiate a list without declared member type");
}
this._owning = owning !== false;
this._begin = new ListNode(this);
this._end = this._begin;
this._size = 0;
},
"destructor": function() {
this.clear();
Class.fn.destructor.call(this);
},
"begin": function() {
return new ListIterator(this._begin);
},
"clear": function() {
var node = this._begin;
while (node !== this._end) {
node = node._next;
node._prev.destructor();
}
node._prev = null;
this._begin = node;
this._size = 0;
},
"end": function() {
return new ListIterator(this._end);
},
"erase": function(begin, end) {
if (end === undefined) {
end = begin.clone();
end["++"]();
}
if (begin._node === this._begin) {
this._begin = end._node;
end._node._prev = null;
} else {
begin._node._prev._next = end._node;
end._node._prev = begin._node._prev;
}
while(!begin["=="](end)) {
var node = begin._node;
begin["++"]();
--this._size;
node.destructor();
}
},
"insert": function(data, target) {
if (target._node._list !== this) {
throw new Error("An attempt to insert to list using iterator from another container");
}
if (!(data instanceof this.constructor.dataType)) {
throw new Error("An attempt to insert wrong data type into list");
}
var node = new ListNode(this);
node._data = data;
if (target._node === this._begin) {
this._begin = node;
} else {
var bItr = target.clone();
bItr["--"]();
var before = bItr._node;
before._next = node;
node._prev = before;
bItr.destructor();
}
node._next = target._node;
target._node._prev = node;
++this._size;
},
"pop_back": function() {
if (this._begin === this._end) {
throw new Error("An attempt to pop from empty list");
}
var node = this._end._prev;
if (node === this._begin) {
this._begin = this._end;
this._end._prev = null;
} else {
node._prev._next = this._end;
this._end._prev = node._prev;
}
node.destructor();
--this._size;
},
"push_back": function(data) {
if (!(data instanceof this.constructor.dataType)) {
throw new Error("An attempt to insert wrong data type into list");
}
var node = new ListNode(this);
node._data = data;
if (this._size === 0) {
this._begin = node;
} else {
this._end._prev._next = node;
node._prev = this._end._prev;
}
node._next = this._end;
this._end._prev = node;
this._size++;
},
"size": function() {
return this._size;
}
});
var ListNode = Class.inherit({
"className": "ListNode",
"constructor": function(list) {
Class.fn.constructor.call(this);
this._list = list
this._data = null;
this._next = null;
this._prev = null;
this._owning = list._owning !== false;
},
"destructor": function() {
if (this._owning && (this._data instanceof Class)) {
this._data.destructor();
}
delete this._list;
Class.fn.destructor.call(this);
}
});
var ListIterator = Class.inherit({
"className": "ListIterator",
"constructor": function(node) {
Class.fn.constructor.call(this);
this._node = node;
},
"++": function() {
if (this._node._next === null) {
throw new Error("An attempt to increment iterator, pointing at the end of container");
}
this._node = this._node._next;
},
"--": function() {
if (this._node._prev === null) {
throw new Error("An attempt to decrement iterator, pointing at the beginning of container");
}
this._node = this._node._prev;
},
"*": function() {
if (this._node._data === null) {
throw new Error("An attempt to dereference iterator, pointing at the end of container");
}
return this._node._data;
},
"==": function(other) {
return this._node === other._node;
},
"clone": function() {
return new ListIterator(this._node);
}
});
AbstractList.dataType = undefined;
AbstractList.iterator = ListIterator;
AbstractList.template = function(data) {
if (!(data instanceof Function)) {
throw new Error("Wrong argument to template a list");
}
var List = AbstractList.inherit({
"className": "List",
"constructor": function(owning) {
AbstractList.fn.constructor.call(this, owning);
}
});
List.dataType = data;
return List;
};
module.exports = AbstractList;