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import { computed } from "mobx";
import { observer } from "mobx-react";
import { CollectionViewProps, CursorEntry } from "../CollectionSubView";
import "./CollectionFreeFormView.scss";
import React = require("react");
import v5 = require("uuid/v5");
import { CurrentUserUtils } from "../../../../server/authentication/models/current_user_utils";
@observer
export class CollectionFreeFormRemoteCursors extends React.Component<CollectionViewProps> {
protected getCursors(): CursorEntry[] {
let doc = this.props.Document;
let id = CurrentUserUtils.id;
let cursors = doc.GetList(KeyStore.Cursors, [] as CursorEntry[]);
let notMe = cursors.filter(entry => entry.Data[0][0] !== id);
return id ? notMe : [];
}
private crosshairs?: HTMLCanvasElement;
drawCrosshairs = (backgroundColor: string) => {
if (this.crosshairs) {
let c = this.crosshairs;
let ctx = c.getContext('2d');
if (ctx) {
ctx.fillStyle = backgroundColor;
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();
// ctx.font = "10px Arial";
// ctx.fillText(CurrentUserUtils.email[0].toUpperCase(), 10, 10);
}
}
}
@computed
get sharedCursors() {
return this.getCursors().map(entry => {
if (entry.Data.length > 0) {
let id = entry.Data[0][0];
let email = entry.Data[0][1];
let point = entry.Data[1];
this.drawCrosshairs("#" + v5(id, v5.URL).substring(0, 6).toUpperCase() + "22");
return (
<div key={id} className="collectionFreeFormRemoteCursors-cont"
style={{ transform: `translate(${point[0] - 10}px, ${point[1] - 10}px)` }}
>
<canvas className="collectionFreeFormRemoteCursors-canvas"
ref={(el) => { if (el) this.crosshairs = el; }}
width={20}
height={20}
/>
<p className="collectionFreeFormRemoteCursors-symbol">
{email[0].toUpperCase()}
</p>
</div>
);
}
});
}
render() {
return this.sharedCursors;
}
}
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