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import { action, observable } from "mobx";
import { observer } from "mobx-react";
import { Document } from "../../../../fields/Document";
import { Documents } from "../../../documents/Documents";
import { Transform } from "../../../util/Transform";
import { CollectionFreeFormView } from "./CollectionFreeFormView";
import "./PreviewCursor.scss";
import React = require("react");
export interface PreviewCursorProps {
getTransform: () => Transform;
getContainerTransform: () => Transform;
container: CollectionFreeFormView;
addLiveTextDocument: (doc: Document) => void;
}
@observer
export class PreviewCursor extends React.Component<PreviewCursorProps> {
@observable _lastX: number = 0;
@observable _lastY: number = 0;
@observable public _visible: boolean = false;
@observable public DownX: number = 0;
@observable public DownY: number = 0;
_showOnUp: boolean = false;
public _previewDivRef = React.createRef<HTMLDivElement>();
@action
cleanupInteractions = () => {
document.removeEventListener("pointerup", this.onPointerUp, true);
}
@action
onPointerDown = (e: React.PointerEvent) => {
this._visible = false;
document.removeEventListener("keypress", this.onKeyPress, false);
this._showOnUp = true;
this._lastX = this.DownX = e.pageX;
this._lastY = this.DownY = e.pageY;
document.addEventListener("pointerup", this.onPointerUp, true);
document.addEventListener("pointermove", this.onPointerMove, true);
}
@action
onPointerMove = (e: PointerEvent): void => {
if (Math.abs(this.DownX - e.clientX) > 4 || Math.abs(this.DownY - e.clientY) > 4) {
this._showOnUp = false;
}
}
@action
onPointerUp = (e: PointerEvent): void => {
if (this._showOnUp) {
document.addEventListener("keypress", this.onKeyPress, false);
this._visible = true;
}
this.cleanupInteractions();
}
@action
onKeyPress = (e: KeyboardEvent) => {
// Mixing events between React and Native is finicky. In FormattedTextBox, we set the
// DASHFormattedTextBoxHandled flag when a text box consumes a key press so that we can ignore
// the keyPress here.
//if not these keys, make a textbox if preview cursor is active!
if (!e.ctrlKey && !e.altKey && !e.defaultPrevented && !(e as any).DASHFormattedTextBoxHandled) {
//make textbox and add it to this collection
let [x, y] = this.props.getTransform().transformPoint(this._lastX, this._lastY);
let newBox = Documents.TextDocument({ width: 200, height: 100, x: x, y: y, title: "typed text" });
this.props.addLiveTextDocument(newBox);
document.removeEventListener("keypress", this.onKeyPress, false);
this._visible = false;
e.stopPropagation();
}
}
//when focus is lost, this will remove the preview cursor
@action
onBlur = (): void => {
this._visible = false;
document.removeEventListener("keypress", this.onKeyPress, false);
}
render() {
//get local position and place cursor there!
let p = this.props.getContainerTransform().transformPoint(this._lastX, this._lastY);
if (this._visible && this._previewDivRef.current)
this._previewDivRef.current!.focus();
return (
<div className="previewCursorView" tabIndex={0} ref={this._previewDivRef} onBlur={this.onBlur} onPointerDown={this.onPointerDown}>
{this.props.children}
{!this._visible ? (null) :
<div className="previewCursor" id="previewCursor" style={{ transform: `translate(${p[0]}px, ${p[1]}px)` }}>I</div>}
</div>
)
}
}
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