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import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
import EquationEditor from 'equation-editor-react';
import * as iink from 'iink-js';
import { action, observable, reaction } from 'mobx';
import { observer } from 'mobx-react';
import * as React from 'react';
import { WidthSym } from '../../../fields/Doc';
import { Id } from '../../../fields/FieldSymbols';
import { NumCast, StrCast } from '../../../fields/Types';
import { TraceMobx } from '../../../fields/util';
import { Docs } from '../../documents/Documents';
import { ViewBoxBaseComponent } from '../DocComponent';
import { LightboxView } from '../LightboxView';
import './EquationBox.scss';
import { FieldView, FieldViewProps } from './FieldView';
@observer
export class EquationBox extends ViewBoxBaseComponent<FieldViewProps>() {
public static LayoutString(fieldKey: string) { return FieldView.LayoutString(EquationBox, fieldKey); }
public static SelectOnLoad: string = "";
_ref: React.RefObject<EquationEditor> = React.createRef();
@observable _inkOpen = false;
@observable _inkEditor: any;
@observable _inkRef: any;
componentDidMount() {
if (EquationBox.SelectOnLoad === this.rootDoc[Id] && (!LightboxView.LightboxDoc || LightboxView.IsLightboxDocView(this.props.docViewPath()))) {
this.props.select(false);
this._ref.current!.mathField.focus();
this._ref.current!.mathField.select();
}
reaction(() => StrCast(this.dataDoc.text),
text => {
if (text && text !== this._ref.current!.mathField.latex()) {
this._ref.current!.mathField.latex(text);
}
});
reaction(() => this.props.isSelected(),
selected => {
if (this._ref.current) {
if (selected) this._ref.current.element.current.children[0].addEventListener("keydown", this.keyPressed, true);
else this._ref.current.element.current.children[0].removeEventListener("keydown", this.keyPressed);
}
}, { fireImmediately: true });
}
componentWillUnmount() {
this._inkRef.removeEventListener('exported', this.exportInk);
}
@action
keyPressed = (e: KeyboardEvent) => {
const _height = Number(getComputedStyle(this._ref.current!.element.current).height.replace("px", ""));
const _width = Number(getComputedStyle(this._ref.current!.element.current).width.replace("px", ""));
if (e.key === "Enter") {
const nextEq = Docs.Create.EquationDocument({
title: "# math", text: StrCast(this.dataDoc.text), _width, _height: 25,
x: NumCast(this.layoutDoc.x), y: NumCast(this.layoutDoc.y) + _height + 10
});
EquationBox.SelectOnLoad = nextEq[Id];
this.props.addDocument?.(nextEq);
e.stopPropagation();
}
if (e.key === "Tab") {
const graph = Docs.Create.FunctionPlotDocument([this.rootDoc], {
x: NumCast(this.layoutDoc.x) + this.layoutDoc[WidthSym](),
y: NumCast(this.layoutDoc.y),
_width: 400, _height: 300, backgroundColor: "white"
});
this.props.addDocument?.(graph);
e.stopPropagation();
}
if (e.key === "Backspace" && !this.dataDoc.text) this.props.removeDocument?.(this.rootDoc);
}
onChange = (str: string) => {
this.dataDoc.text = str;
const style = this._ref.current && getComputedStyle(this._ref.current.element.current);
if (style) {
const _height = Number(style.height.replace("px", ""));
const _width = Number(style.width.replace("px", ""));
this.layoutDoc._width = Math.max(35, _width);
this.layoutDoc._height = Math.max(25, _height);
}
}
@action
toggleInk = (e: React.PointerEvent) => {
e.stopPropagation();
this._inkOpen = !this._inkOpen;
if (!this._inkEditor) {
this._inkEditor = this._inkRef ? iink.register(this._inkRef, {
recognitionParams: {
type: 'MATH',
protocol: 'WEBSOCKET',
server: {
host: 'cloud.myscript.com',
applicationKey: '7277ec34-0c2e-4ee1-9757-ccb657e3f89f',
hmacKey: 'f5cb18f2-1f95-4ddb-96ac-3f7c888dffc1',
},
iink: {
math: {
mimeTypes: ['application/x-latex', 'application/vnd.myscript.jiix']
},
export: {
jiix: {
strokes: true
}
}
}
}
}) : null;
this._inkRef.addEventListener('exported', this.exportInk)
}
}
convertInk = (e: React.MouseEvent) => {
this._inkRef.editor.convert();
}
clearInk = (e: React.MouseEvent) => {
this._inkRef.editor.clear();
this.onChange("");
}
exportInk = (e: any) => {
const exports = e.detail.exports;
if (exports && exports['application/x-latex']) {
this.onChange(exports['application/x-latex']);
console.log(JSON.parse(exports['application/vnd.myscript.jiix']).expressions[0].items[0]);
}
}
render() {
TraceMobx();
const scale = (this.props.scaling?.() || 1) * NumCast(this.layoutDoc._viewScale, 1);
return (<div className="equationBox-cont"
onPointerDown={e => !e.ctrlKey && e.stopPropagation()}
style={{
transform: `scale(${scale})`,
width: `calc(${100 / scale}% + 25px)`,
height: `${100 / scale}%`,
pointerEvents: !this.props.isSelected() ? "none" : undefined,
}}
onKeyDown={e => e.stopPropagation()}>
<EquationEditor ref={this._ref}
value={this.dataDoc.text || "x"}
spaceBehavesLikeTab={true}
onChange={this.onChange}
autoCommands="pi theta sqrt sum prod alpha beta gamma rho"
autoOperatorNames="sin cos tan" />
<div className="button"
style={{ display: this.props.isContentActive() ? "flex" : "none" }}
onPointerDown={this.toggleInk}>
<FontAwesomeIcon icon="pencil-alt" />
</div>
<div className='ink-editor'
ref={action((r: any) => this._inkRef = r)}
id="editor" onPointerDown={(e) => e.stopPropagation()}
touch-action="none"
style={{ display: this._inkOpen && this.props.isContentActive() ? "block" : "none" }}>
<button onClick={this.convertInk}>convert</button>
<button onClick={this.clearInk}>clear</button>
</div>
</div>);
}
}
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