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[Perf] Message List: Faster focus animations

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This commit is contained in:
Alexander Zinchuk 2021-07-13 17:31:26 +03:00
parent c3d6285795
commit c4e3a41ff1
3 changed files with 15 additions and 7 deletions
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2
src/components/middle/message/hooks/useFocusMessage.ts
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@ -3,7 +3,7 @@ import fastSmoothScroll from '../../../../util/fastSmoothScroll';
import { FocusDirection } from '../../../../types';
// This is the max scroll offset within existing viewport.
const FOCUS_MAX_OFFSET = 1500;
const FOCUS_MAX_OFFSET = 1200;
// This is used when the viewport was replaced.
const RELOCATED_FOCUS_OFFSET = 1000;
const FOCUS_MARGIN = 20;

5
src/modules/actions/ui/messages.ts
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@ -26,7 +26,8 @@ import {
import { findLast } from '../../../util/iteratees';
import { IS_TOUCH_ENV } from '../../../util/environment';
const FOCUS_DURATION = 2000;
const FOCUS_DURATION = 1500;
const FOCUS_NO_HIGHLIGHT_DURATION = 500; // Matches `fastSmoothScroll:MAX_JS_DURATION`
const POLL_RESULT_OPEN_DELAY_MS = 450;
let blurTimeout: number | undefined;
@ -269,7 +270,7 @@ addReducer('focusMessage', (global, actions, payload) => {
newGlobal = updateFocusedMessage(newGlobal);
newGlobal = updateFocusDirection(newGlobal);
setGlobal(newGlobal);
}, FOCUS_DURATION);
}, noHighlight ? FOCUS_NO_HIGHLIGHT_DURATION : FOCUS_DURATION);
global = updateFocusedMessage(global, chatId, messageId, noHighlight);
global = updateFocusDirection(global, undefined);

15
src/util/fastSmoothScroll.ts
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@ -7,9 +7,10 @@ import { dispatchHeavyAnimationEvent } from '../hooks/useHeavyAnimationCheck';
import { fastRaf } from './schedulers';
import { animateSingle } from './animation';
const MAX_DISTANCE = 1500;
const MAX_DISTANCE = 1200;
const MIN_JS_DURATION = 250;
const MAX_JS_DURATION = 600;
const MAX_JS_DURATION = 500;
const SHORT_CURVE_THRESHOLD = 150; // px
let isAnimating = false;
@ -115,8 +116,10 @@ function scrollWithJs(
return;
}
const absPath = Math.abs(path);
const transition = absPath < SHORT_CURVE_THRESHOLD ? shortTransition : longTransition;
const duration = forceDuration || (
MIN_JS_DURATION + (Math.abs(path) / MAX_DISTANCE) * (MAX_JS_DURATION - MIN_JS_DURATION)
MIN_JS_DURATION + (absPath / MAX_DISTANCE) * (MAX_JS_DURATION - MIN_JS_DURATION)
);
const startAt = Date.now();
@ -133,6 +136,10 @@ function scrollWithJs(
});
}
function transition(t: number) {
function longTransition(t: number) {
return t === 1 ? 1 : 1 - 2 ** (-10 * t);
}
function shortTransition(t: number) {
return 1 - ((1 - t) ** 3.5);
}