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import { computed } from 'mobx';
import { observer } from 'mobx-react';
import * as mobxUtils from 'mobx-utils';
import * as React from 'react';
import * as uuid from 'uuid';
import CursorField from '../../../../fields/CursorField';
import { Doc, FieldResult } from '../../../../fields/Doc';
import { Id } from '../../../../fields/FieldSymbols';
import { List } from '../../../../fields/List';
import { listSpec } from '../../../../fields/Schema';
import { Cast } from '../../../../fields/Types';
import { CollectionViewProps } from '../CollectionView';
import './CollectionFreeFormView.scss';
@observer
export class CollectionFreeFormRemoteCursors extends React.Component<CollectionViewProps> {
@computed protected get cursors(): CursorField[] {
const doc = this.props.Document;
let cursors: FieldResult<List<CursorField>>;
const id = Doc.UserDoc()[Id];
if (!id || !(cursors = Cast(doc.cursors, listSpec(CursorField)))) {
return [];
}
const now = mobxUtils.now();
return (cursors || []).filter(({ data: { metadata } }) => metadata.id !== id && now - metadata.timestamp < 1000);
}
@computed get renderedCursors() {
return this.cursors.map(
({
data: {
metadata,
position: { x, y },
},
}) => {
return (
<div key={metadata.id} className="collectionFreeFormRemoteCursors-cont" style={{ transform: `translate(${x - 10}px, ${y - 10}px)` }}>
<canvas
className="collectionFreeFormRemoteCursors-canvas"
ref={el => {
if (el) {
const ctx = el.getContext('2d');
if (ctx) {
ctx.fillStyle = '#' + uuid.v5(metadata.id, uuid.v5.URL).substring(0, 6).toUpperCase() + '22';
ctx.fillRect(0, 0, 20, 20);
ctx.fillStyle = 'black';
ctx.lineWidth = 0.5;
ctx.beginPath();
ctx.moveTo(10, 0);
ctx.lineTo(10, 8);
ctx.moveTo(10, 20);
ctx.lineTo(10, 12);
ctx.moveTo(0, 10);
ctx.lineTo(8, 10);
ctx.moveTo(20, 10);
ctx.lineTo(12, 10);
ctx.stroke();
}
}
}}
width={20}
height={20}
/>
<p className="collectionFreeFormRemoteCursors-symbol">{metadata.identifier[0].toUpperCase()}</p>
</div>
);
}
);
}
render() {
return this.renderedCursors;
}
}
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