json-joy
Version:
Collection of libraries for building collaborative editing apps.
48 lines (47 loc) • 1.71 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.CursorState = void 0;
const sync_store_1 = require("../../../util/events/sync-store");
class CursorState {
constructor(ctx) {
this.ctx = ctx;
/** Current score. */
this.score = new sync_store_1.ValueSyncStore(0);
/** By how much the score changed. */
this.scoreDelta = new sync_store_1.ValueSyncStore(0);
/** The last score that was shown to the user. */
this.lastVisScore = new sync_store_1.ValueSyncStore(0);
}
/** -------------------------------------------------- {@link UiLifeCycles} */
start() {
const dom = this.ctx.dom;
let lastNow = 0;
const onChange = (event) => {
const now = Date.now();
const timeDiff = now - lastNow;
let delta = 0;
switch (event.detail.ev?.type) {
case 'delete':
case 'insert':
case 'format':
case 'marker': {
delta = timeDiff < 30 ? 10 : timeDiff < 70 ? 5 : timeDiff < 150 ? 2 : timeDiff <= 1000 ? 1 : -1;
break;
}
default: {
delta = timeDiff <= 1000 ? 0 : -1;
break;
}
}
if (delta)
this.score.next(delta >= 0 ? this.score.value + delta : 0);
this.scoreDelta.next(delta);
lastNow = now;
};
dom.et.addEventListener('change', onChange);
return () => {
dom.et.removeEventListener('change', onChange);
};
}
}
exports.CursorState = CursorState;