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refactor _updateFrameOffset

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This commit is contained in:
siikamiika 2020-04-05 19:21:06 +03:00
parent abd056e563
commit aea7c590d1
1 changed files with 17 additions and 21 deletions
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36
ext/fg/js/popup-proxy.js
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@ -120,8 +120,9 @@ class PopupProxy {
}
async _updateFrameOffset() {
const now = Date.now();
const firstRun = this._frameOffsetUpdatedAt === null;
const expired = firstRun || this._frameOffsetUpdatedAt < Date.now() - PopupProxy._frameOffsetExpireTimeout;
const expired = firstRun || this._frameOffsetUpdatedAt < now - PopupProxy._frameOffsetExpireTimeout;
if (this._frameOffsetPromise === null && !expired) { return; }
if (this._frameOffsetPromise !== null) {
@ -131,27 +132,22 @@ class PopupProxy {
return;
}
this._frameOffsetPromise = this._getFrameOffset();
const handleOffset = (offset) => {
this._frameOffset = offset !== null ? offset : [0, 0];
this._frameOffsetUpdatedAt = Date.now();
this._frameOffsetPromise = null;
};
const handleError = (e) => {
console.error(e);
this._frameOffsetPromise = null;
};
const promise = this._updateFrameOffsetInner(now);
if (firstRun) {
try {
handleOffset(await this._frameOffsetPromise);
} catch (e) {
handleError(e);
await promise;
}
} else {
this._frameOffsetPromise.then(handleOffset, handleError);
}
async _updateFrameOffsetInner(now) {
this._frameOffsetPromise = this._getFrameOffset();
try {
const offset = await this._frameOffsetPromise;
this._frameOffset = offset !== null ? offset : [0, 0];
this._frameOffsetUpdatedAt = now;
} catch (e) {
logError(e);
} finally {
this._frameOffsetPromise = null;
}
}