165 lines
3.7 KiB
TypeScript
165 lines
3.7 KiB
TypeScript
/* Copyright: Ankitects Pty Ltd and contributors
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* License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
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declare var MathJax: any;
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type Callback = () => void | Promise<void>;
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var ankiPlatform = "desktop";
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var typeans;
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var _updatingQueue: Promise<void> = Promise.resolve();
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var qFade = 50;
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var aFade = 0;
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var onUpdateHook: Array<Callback>;
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var onShownHook: Array<Callback>;
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function _runHook(arr: Array<Callback>): Promise<void[]> {
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const promises = [];
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for (let i = 0; i < arr.length; i++) {
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promises.push(arr[i]());
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}
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return Promise.all(promises);
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}
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function _queueAction(action: Callback): void {
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_updatingQueue = _updatingQueue.then(action);
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}
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async function _updateQA(
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html: string,
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fadeTime: number,
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onupdate: Callback,
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onshown: Callback
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): Promise<void> {
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onUpdateHook = [onupdate];
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onShownHook = [onshown];
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const qa = $("#qa");
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const renderError = (kind: string) => (error: Error): void => {
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const errorMessage = String(error).substring(0, 2000);
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const errorStack = String(error.stack).substring(0, 2000);
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qa.html(
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`Invalid ${kind} on card: ${errorMessage}\n${errorStack}`.replace(
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/\n/g,
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"<br />"
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)
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);
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};
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// fade out current text
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await qa.fadeTo(fadeTime, 0).promise();
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// update text
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try {
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qa.html(html);
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} catch (error) {
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renderError("HTML")(error);
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}
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await _runHook(onUpdateHook);
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// wait for mathjax to ready
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await MathJax.startup.promise
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.then(() => {
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// clear MathJax buffers from previous typesets
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MathJax.typesetClear();
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return MathJax.typesetPromise(qa.slice(0, 1));
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})
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.catch(renderError("MathJax"));
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// and reveal when processing is done
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await qa.fadeTo(fadeTime, 1).promise();
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await _runHook(onShownHook);
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}
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function _showQuestion(q: string, bodyclass: string): void {
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_queueAction(() =>
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_updateQA(
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q,
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qFade,
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function () {
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// return to top of window
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window.scrollTo(0, 0);
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document.body.className = bodyclass;
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},
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function () {
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// focus typing area if visible
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typeans = document.getElementById("typeans");
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if (typeans) {
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typeans.focus();
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}
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}
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)
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);
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}
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function _showAnswer(a: string, bodyclass: string): void {
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_queueAction(() =>
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_updateQA(
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a,
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aFade,
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function () {
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if (bodyclass) {
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// when previewing
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document.body.className = bodyclass;
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}
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// scroll to answer?
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var e = $("#answer");
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if (e[0]) {
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e[0].scrollIntoView();
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}
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},
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function () {}
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)
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);
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}
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const _flagColours = {
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1: "#ff6666",
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2: "#ff9900",
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3: "#77ff77",
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4: "#77aaff",
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};
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function _drawFlag(flag: 0 | 1 | 2 | 3 | 4): void {
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var elem = $("#_flag");
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if (flag === 0) {
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elem.hide();
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return;
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}
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elem.show();
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elem.css("color", _flagColours[flag]);
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}
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function _drawMark(mark: boolean): void {
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var elem = $("#_mark");
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if (!mark) {
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elem.hide();
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} else {
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elem.show();
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}
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}
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function _typeAnsPress(): void {
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if ((window.event as KeyboardEvent).keyCode === 13) {
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pycmd("ans");
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}
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}
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function _emulateMobile(enabled: boolean): void {
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const list = document.documentElement.classList;
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if (enabled) {
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list.add("mobile");
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} else {
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list.remove("mobile");
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}
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}
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