Commit | Line | Data |
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ef72d3f5 | 1 | export const DEFAULT_CIRCULAR_ARRAY_SIZE = 2000; |
edfb206c | 2 | |
ef72d3f5 | 3 | export class CircularArray<T> extends Array<T> { |
365f6bc9 | 4 | public size: number; |
edfb206c | 5 | |
534434b0 | 6 | constructor(size: number = DEFAULT_CIRCULAR_ARRAY_SIZE, ...items: T[]) { |
edfb206c | 7 | super(); |
534434b0 JB |
8 | this.checkSize(size); |
9 | this.size = size; | |
10 | if (arguments.length > 1) { | |
11 | this.push(...items); | |
12 | } | |
edfb206c JB |
13 | } |
14 | ||
d43a619b | 15 | public push(...items: T[]): number { |
534434b0 JB |
16 | const length = super.push(...items); |
17 | if (length > this.size) { | |
18 | super.splice(0, length - this.size); | |
edfb206c | 19 | } |
534434b0 | 20 | return this.length; |
edfb206c JB |
21 | } |
22 | ||
d43a619b | 23 | public unshift(...items: T[]): number { |
534434b0 JB |
24 | const length = super.unshift(...items); |
25 | if (length > this.size) { | |
26 | super.splice(this.size, items.length); | |
edfb206c | 27 | } |
35e15933 | 28 | return this.length; |
edfb206c | 29 | } |
c70ff58d | 30 | |
534434b0 JB |
31 | public concat(...items: (T | ConcatArray<T>)[]): CircularArray<T> { |
32 | const concatenatedCircularArray = super.concat( | |
33 | items as T[] | |
34 | ) as CircularArray<T>; | |
35 | concatenatedCircularArray.size = this.size; | |
36 | if (concatenatedCircularArray.length > concatenatedCircularArray.size) { | |
37 | concatenatedCircularArray.splice( | |
38 | 0, | |
9be37455 | 39 | concatenatedCircularArray.length - concatenatedCircularArray.size |
534434b0 | 40 | ); |
c70ff58d | 41 | } |
534434b0 | 42 | return concatenatedCircularArray; |
c70ff58d JB |
43 | } |
44 | ||
d43a619b | 45 | public splice(start: number, deleteCount?: number, ...items: T[]): T[] { |
534434b0 JB |
46 | let itemsRemoved: T[]; |
47 | if (arguments.length >= 3 && typeof deleteCount !== 'undefined') { | |
48 | itemsRemoved = super.splice(start, deleteCount); | |
49 | // FIXME: that makes the items insert not in place | |
50 | this.push(...items); | |
51 | } else if (arguments.length === 2) { | |
52 | itemsRemoved = super.splice(start, deleteCount); | |
53 | } else { | |
54 | itemsRemoved = super.splice(start); | |
55 | } | |
56 | return itemsRemoved; | |
c70ff58d | 57 | } |
d43a619b JB |
58 | |
59 | public resize(size: number): void { | |
534434b0 | 60 | this.checkSize(size); |
d43a619b JB |
61 | if (size === 0) { |
62 | this.length = 0; | |
534434b0 JB |
63 | } else if (size < this.size) { |
64 | for (let i = size; i < this.size; i++) { | |
65 | super.pop(); | |
66 | } | |
d43a619b JB |
67 | } |
68 | this.size = size; | |
69 | } | |
70 | ||
71 | public empty(): boolean { | |
72 | return this.length === 0; | |
73 | } | |
74 | ||
75 | public full(): boolean { | |
76 | return this.length === this.size; | |
77 | } | |
534434b0 JB |
78 | |
79 | private checkSize(size: number) { | |
80 | if (size < 0) { | |
81 | throw new RangeError('Invalid circular array size'); | |
82 | } | |
83 | } | |
edfb206c | 84 | } |