json-joy
Version:
Collection of libraries for building collaborative editing apps.
116 lines (115 loc) • 3.91 kB
JavaScript
import * as React from 'react';
import useHarmonicIntervalFn from 'react-use/lib/useHarmonicIntervalFn';
import { keyframes, rule } from 'nano-theme';
import { usePeritext } from '../../web/react/context';
import { useSyncStore, useSyncStoreOpt } from '../../web/react/hooks';
import { DefaultRendererColors } from './constants';
import { CommonSliceType } from '../../../json-crdt-extensions';
import { useCursorPlugin } from './context';
import { CaretScore } from '../../components/CaretScore';
import { Anchor } from '../../../json-crdt-extensions/peritext/rga/constants';
const height = 1.5;
const ms = 350;
const moveAnimation = keyframes({
from: {
tr: 'scale(1.2)',
},
to: {
tr: 'scale(1)',
},
});
const blockClass = rule({
pos: 'relative',
pe: 'none',
us: 'none',
w: '0px',
h: '100%',
bg: 'black',
va: 'bottom',
});
const innerClass = rule({
pos: 'absolute',
b: '-.18em',
l: '-.065em',
w: 'calc(max(.2em, 2px))',
h: `${height}em`,
bg: DefaultRendererColors.ActiveCursor,
bdl: `1px dotted ${DefaultRendererColors.InactiveCursor}`,
bdrad: '0.0625em',
'mix-blend-mode': 'multiply',
an: moveAnimation + ' .25s ease-out forwards',
});
const innerClass2 = rule({
'mix-blend-mode': 'hard-light',
});
const dotClass = rule({
pos: 'absolute',
pe: 'none',
us: 'none',
w: '2px',
h: '2px',
bdrad: '50%',
z: 9999,
top: '-8px',
left: '4px',
bg: DefaultRendererColors.InactiveCursor,
});
export const RenderCaret = ({ italic, point, children }) => {
const ctx = usePeritext();
const pending = useSyncStore(ctx.peritext.editor.pending);
const [show, setShow] = React.useState(true);
useHarmonicIntervalFn(() => setShow(Date.now() % (ms + ms) > ms), ms);
const { dom } = usePeritext();
const focus = useSyncStoreOpt(dom?.cursor.focus) || false;
const plugin = useCursorPlugin();
const ref = React.useRef(null);
// Place caret at the end of line wrap.
React.useEffect(() => {
const el = ref.current;
if (!el)
return;
const style = el.style;
style.top = '0px';
style.left = '0px';
if (point.anchor === Anchor.After) {
if (point.isAbs())
return;
const rect = ctx.dom.getCharRect(point.id);
if (!rect)
return;
const nextPoint = point.copy((p) => p.refBefore());
if (nextPoint.isAbs())
return;
const rect2 = ctx.dom.getCharRect(nextPoint.id);
if (!rect2)
return;
if (rect.x > rect2.x) {
const dx = rect.x + rect.width - rect2.x;
const dy = rect.y - rect2.y;
style.top = dy + 'px';
style.left = dx + 'px';
}
}
}, [point, ctx.dom.getCharRect]);
const anchorForward = point.anchor === Anchor.Before;
const score = plugin.score.value;
const delta = plugin.scoreDelta.value;
const style = {
background: !focus
? DefaultRendererColors.InactiveCursor
: show
? DefaultRendererColors.ActiveCursor
: 'transparent',
};
if (italic || pending.has(CommonSliceType.i)) {
style.rotate = '11deg';
}
return (React.createElement("span", { ref: ref, className: blockClass },
children,
score !== plugin.lastVisScore.value && (React.createElement(CaretScore, { score: score, delta: delta, onRender: () => {
plugin.lastVisScore.value = score;
} })),
anchorForward && React.createElement("span", { className: dotClass }),
React.createElement("span", { className: innerClass + innerClass2, style: style }),
React.createElement("span", { className: innerClass, style: style })));
};