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<div id="main">
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<h1 class="page-title">Source: core/LinkedList.js</h1>
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<section>
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<article>
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<pre class="sunlight-highlight-javascript linenums">/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2014 Photon Storm Ltd.
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* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
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*/
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/**
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* A basic linked list data structure.
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*
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* @class Phaser.LinkedList
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* @constructor
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*/
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Phaser.LinkedList = function () {
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/**
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* @property {object} next - Next element in the list.
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* @default
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*/
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this.next = null;
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/**
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* @property {object} prev - Previous element in the list.
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* @default
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*/
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this.prev = null;
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/**
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* @property {object} first - First element in the list.
|
|
* @default
|
|
*/
|
|
this.first = null;
|
|
|
|
/**
|
|
* @property {object} last - Last element in the list.
|
|
* @default
|
|
*/
|
|
this.last = null;
|
|
|
|
/**
|
|
* @property {object} game - Number of elements in the list.
|
|
* @default
|
|
*/
|
|
this.total = 0;
|
|
|
|
};
|
|
|
|
Phaser.LinkedList.prototype = {
|
|
|
|
/**
|
|
* Adds a new element to this linked list.
|
|
*
|
|
* @method Phaser.LinkedList#add
|
|
* @param {object} child - The element to add to this list. Can be a Phaser.Sprite or any other object you need to quickly iterate through.
|
|
* @return {object} The child that was added.
|
|
*/
|
|
add: function (child) {
|
|
|
|
// If the list is empty
|
|
if (this.total === 0 && this.first == null && this.last == null)
|
|
{
|
|
this.first = child;
|
|
this.last = child;
|
|
this.next = child;
|
|
child.prev = this;
|
|
this.total++;
|
|
return child;
|
|
}
|
|
|
|
// Get gets appended to the end of the list, regardless of anything, and it won't have any children of its own (non-nested list)
|
|
this.last.next = child;
|
|
|
|
child.prev = this.last;
|
|
|
|
this.last = child;
|
|
|
|
this.total++;
|
|
|
|
return child;
|
|
|
|
},
|
|
|
|
/**
|
|
* Removes the given element from this linked list if it exists.
|
|
*
|
|
* @method Phaser.LinkedList#remove
|
|
* @param {object} child - The child to be removed from the list.
|
|
*/
|
|
remove: function (child) {
|
|
|
|
if (child == this.first)
|
|
{
|
|
// It was 'first', make 'first' point to first.next
|
|
this.first = this.first.next;
|
|
}
|
|
else if (child == this.last)
|
|
{
|
|
// It was 'last', make 'last' point to last.prev
|
|
this.last = this.last.prev;
|
|
}
|
|
|
|
if (child.prev)
|
|
{
|
|
// make child.prev.next point to childs.next instead of child
|
|
child.prev.next = child.next;
|
|
}
|
|
|
|
if (child.next)
|
|
{
|
|
// make child.next.prev point to child.prev instead of child
|
|
child.next.prev = child.prev;
|
|
}
|
|
|
|
child.next = child.prev = null;
|
|
|
|
if (this.first == null )
|
|
{
|
|
this.last = null;
|
|
}
|
|
|
|
this.total--;
|
|
|
|
},
|
|
|
|
/**
|
|
* Calls a function on all members of this list, using the member as the context for the callback.
|
|
* The function must exist on the member.
|
|
*
|
|
* @method Phaser.LinkedList#callAll
|
|
* @param {function} callback - The function to call.
|
|
*/
|
|
callAll: function (callback) {
|
|
|
|
if (!this.first || !this.last)
|
|
{
|
|
return;
|
|
}
|
|
|
|
var entity = this.first;
|
|
|
|
do
|
|
{
|
|
if (entity && entity[callback])
|
|
{
|
|
entity[callback].call(entity);
|
|
}
|
|
|
|
entity = entity.next;
|
|
|
|
}
|
|
while(entity != this.last.next);
|
|
|
|
}
|
|
|
|
};
|
|
|
|
Phaser.LinkedList.prototype.constructor = Phaser.LinkedList;
|
|
</pre>
|
|
</article>
|
|
</section>
|
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</div>
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<div class="clearfix"></div>
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<footer>
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<span class="copyright">
|
|
Phaser Copyright © 2012-2014 Photon Storm Ltd.
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</span>
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<br />
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<span class="jsdoc-message">
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.3.0-dev</a>
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on Fri Apr 11 2014 13:08:20 GMT+0100 (BST) using the <a href="https://github.com/terryweiss/docstrap">DocStrap template</a>.
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