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Replace _updatingQa synchronization with promise-based _updatingQueue

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This commit is contained in:
Henrik Giesel 2020-12-30 14:45:27 +01:00
parent eea6bf963b
commit aaa30a5d49
1 changed files with 9 additions and 18 deletions
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27
qt/aqt/data/web/js/reviewer.ts
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@ -5,7 +5,7 @@ declare var MathJax: any;
var ankiPlatform = "desktop";
var typeans;
var _updatingQA = false;
var _updatingQueue: Promise<void> = Promise.resolve();
var qFade = 50;
var aFade = 0;
@ -23,18 +23,11 @@ function _runHook(arr: Array<() => void | Promise<void>>): Promise<void[]> {
return Promise.all(promises);
}
async function _updateQA(html, fadeTime, onupdate, onshown) {
// if a request to update q/a comes in before the previous content
// has been loaded, wait a while and try again
if (_updatingQA) {
setTimeout(function () {
_updateQA(html, fadeTime, onupdate, onshown);
}, 50);
return;
}
_updatingQA = true;
function _queueAction(action: () => Promise<void>): void {
_updatingQueue = _updatingQueue.then(action);
}
async function _updateQA(html, fadeTime, onupdate, onshown): Promise<void> {
onUpdateHook = [onupdate];
onShownHook = [onshown];
@ -67,12 +60,10 @@ async function _updateQA(html, fadeTime, onupdate, onshown) {
// and reveal when processing is done
await qa.fadeTo(fadeTime, 1).promise();
await _runHook(onShownHook);
_updatingQA = false;
}
function _showQuestion(q, bodyclass) {
_updateQA(
_queueAction(() => _updateQA(
q,
qFade,
function () {
@ -88,11 +79,11 @@ function _showQuestion(q, bodyclass) {
typeans.focus();
}
}
);
));
}
function _showAnswer(a, bodyclass) {
_updateQA(
_queueAction(() => _updateQA(
a,
aFade,
function () {
@ -108,7 +99,7 @@ function _showAnswer(a, bodyclass) {
}
},
function () {}
);
));
}
const _flagColours = {