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author | Matthias Schiffer <mschiffer@universe-factory.net> | 2019-12-24 13:53:16 +0100 |
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committer | Matthias Schiffer <mschiffer@universe-factory.net> | 2019-12-24 13:53:16 +0100 |
commit | 3c51a1994f41b625823c4f15e92396b5498ce23c (patch) | |
tree | 7a96310ec32df82ac87039ea555300bcab510a5e /src/renderer/runtime/util.ts | |
parent | 33926af829848050c54c698ed22da9fe2b912aea (diff) | |
download | rpgedit-3c51a1994f41b625823c4f15e92396b5498ce23c.tar rpgedit-3c51a1994f41b625823c4f15e92396b5498ce23c.zip |
Move renderer into "runtime" subdirectory
Diffstat (limited to 'src/renderer/runtime/util.ts')
-rw-r--r-- | src/renderer/runtime/util.ts | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/renderer/runtime/util.ts b/src/renderer/runtime/util.ts new file mode 100644 index 0000000..5ea0c88 --- /dev/null +++ b/src/renderer/runtime/util.ts @@ -0,0 +1,59 @@ +export function recordToMap<T>(r: Record<string, T>): Map<string, T> { + const ret = new Map(); + + for (const k of Object.keys(r)) + ret.set(k, r[k]); + + return ret; +} + +export function mapValues<K, V1, V2>(f: (v: V1) => V2, map: Map<K, V1>): Map<K, V2> { + const ret: Map<K, V2> = new Map(); + + for (const [k, v] of map) + ret.set(k, f(v)); + + return ret; +} + +export async function mapValuesAsync<K, V1, V2>(f: (v: V1) => Promise<V2>, map: Map<K, V1>): Promise<Map<K, V2>> { + const ret: Map<K, V2> = new Map(); + + for (const [k, v] of mapValues(f, map)) + ret.set(k, await v); + + return ret; +} + +export function nextPowerOf2(n: number): number { + let i = 1; + + while (i < n) + i *= 2; + + return i; +} + +export class Listenable<T extends any[]> { + private readonly listeners: Array<(...args: T) => void> = []; + + public addListener(listener: (...args: T) => void): void { + this.listeners.push(listener); + } + + protected runListeners(...args: T): void { + this.listeners.forEach((l) => l(...args)); + } +} + +export async function getJSON(url: string): Promise<any> { + const res = await window.fetch(url); + if (res.status < 200 || res.status >= 300) + throw new Error(res.statusText); + + return await res.json(); +} + +export function nextAnimationFrame(): Promise<DOMHighResTimeStamp> { + return new Promise((resolve) => window.requestAnimationFrame(resolve)); +} |