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import React = require("react");
import { action, observable } from "mobx";
import { observer } from "mobx-react";
import { Doc } from "../../fields/Doc";
import { ControlPoint, InkData, PointData } from "../../fields/InkField";
import { listSpec } from "../../fields/Schema";
import { Cast } from "../../fields/Types";
import { setupMoveUpEvents } from "../../Utils";
import { Transform } from "../util/Transform";
import { UndoManager } from "../util/UndoManager";
import { Colors } from "./global/globalEnums";
import { InkStrokeProperties } from "./InkStrokeProperties";
import { List } from "../../fields/List";
import { InkingStroke } from "./InkingStroke";
export interface InkControlProps {
inkDoc: Doc;
inkCtrlPoints: InkData;
screenCtrlPoints: InkData;
screenSpaceLineWidth: number;
ScreenToLocalTransform: () => Transform;
nearestScreenPt: () => PointData | undefined;
}
@observer
export class InkControlPtHandles extends React.Component<InkControlProps> {
@observable private _overControl = -1;
@observable controlUndo: UndoManager.Batch | undefined;
componentDidMount() {
document.addEventListener("keydown", this.onDelete, true);
}
componentWillUnmount() {
document.removeEventListener("keydown", this.onDelete, true);
}
/**
* Handles the movement of a selected control point when the user clicks and drags.
* @param controlIndex The index of the currently selected control point.
*/
@action
onControlDown = (e: React.PointerEvent, controlIndex: number): void => {
if (InkStrokeProperties.Instance) {
const screenScale = this.props.ScreenToLocalTransform().Scale;
const order = controlIndex % 4;
const handleIndexA = ((order === 3 ? controlIndex - 1 : controlIndex - 2) + this.props.inkCtrlPoints.length) % this.props.inkCtrlPoints.length;
const handleIndexB = (order === 3 ? controlIndex + 2 : controlIndex + 1) % this.props.inkCtrlPoints.length;
const brokenIndices = Cast(this.props.inkDoc.brokenInkIndices, listSpec("number"));
const wasSelected = InkStrokeProperties.Instance?._currentPoint === controlIndex;
setupMoveUpEvents(this, e,
action((e: PointerEvent, down: number[], delta: number[]) => {
if (!this.controlUndo) this.controlUndo = UndoManager.StartBatch("drag ink ctrl pt");
InkStrokeProperties.Instance?.moveControlPtHandle(delta[0] * screenScale, delta[1] * screenScale, controlIndex);
return false;
}),
action(() => {
if (this.controlUndo) {
InkStrokeProperties.Instance?.snapControl(this.props.inkDoc, controlIndex);
}
this.controlUndo?.end();
this.controlUndo = undefined;
UndoManager.FilterBatches(["data", "x", "y", "width", "height"]);
}),
action((e: PointerEvent, doubleTap: boolean | undefined) => {
const equivIndex = controlIndex === 0 ? this.props.inkCtrlPoints.length - 1 : controlIndex === this.props.inkCtrlPoints.length - 1 ? 0 : controlIndex;
if (doubleTap || e.button === 2) {
if (!brokenIndices?.includes(equivIndex) && !brokenIndices?.includes(controlIndex)) {
if (brokenIndices) brokenIndices.push(controlIndex);
else this.props.inkDoc.brokenInkIndices = new List<number>([controlIndex]);
} else {
if (brokenIndices?.includes(equivIndex)) {
if (!this.controlUndo) this.controlUndo = UndoManager.StartBatch("make smooth");
InkStrokeProperties.Instance?.snapHandleTangent(equivIndex, handleIndexA, handleIndexB);
}
if (equivIndex !== controlIndex && brokenIndices?.includes(controlIndex)) {
if (!this.controlUndo) this.controlUndo = UndoManager.StartBatch("make smooth");
InkStrokeProperties.Instance?.snapHandleTangent(controlIndex, handleIndexA, handleIndexB);
}
}
this.controlUndo?.end();
this.controlUndo = undefined;
}
this.changeCurrPoint(controlIndex);
}), undefined, undefined, () => wasSelected && this.changeCurrPoint(-1));
}
}
/**
* Updates whether a user has hovered over a particular control point or point that could be added
* on click.
*/
@action onEnterControl = (i: number) => { this._overControl = i; };
@action onLeaveControl = () => { this._overControl = -1; };
/**
* Deletes the currently selected point.
*/
@action
onDelete = (e: KeyboardEvent) => {
if (["-", "Backspace", "Delete"].includes(e.key)) {
InkStrokeProperties.Instance?.deletePoints();
e.stopPropagation();
}
}
/**
* Changes the current selected control point.
*/
@action
changeCurrPoint = (i: number) => {
if (InkStrokeProperties.Instance) {
InkStrokeProperties.Instance._currentPoint = i;
}
}
render() {
// Accessing the current ink's data and extracting all control points.
const scrData = this.props.screenCtrlPoints;
const sreenCtrlPoints: ControlPoint[] = [];
for (let i = 0; i <= scrData.length - 4; i += 4) {
sreenCtrlPoints.push({ ...scrData[i], I: i });
sreenCtrlPoints.push({ ...scrData[i + 3], I: i + 3 });
}
const inkData = this.props.inkCtrlPoints;
const inkCtrlPts: ControlPoint[] = [];
for (let i = 0; i <= inkData.length - 4; i += 4) {
inkCtrlPts.push({ ...inkData[i], I: i });
inkCtrlPts.push({ ...inkData[i + 3], I: i + 3 });
}
const screenSpaceLineWidth = this.props.screenSpaceLineWidth;
const closed = InkingStroke.IsClosed(inkData);
const nearestScreenPt = this.props.nearestScreenPt();
const TagType = (broken?: boolean) => broken ? "rect" : "circle";
const hdl = (control: { X: number, Y: number, I: number }, scale: number, color: string) => {
const broken = Cast(this.props.inkDoc.brokenInkIndices, listSpec("number"))?.includes(control.I);
const Tag = TagType((control.I === 0 || control.I === inkData.length - 1) && !closed) as keyof JSX.IntrinsicElements;
return <Tag key={control.I.toString() + scale}
x={control.X - screenSpaceLineWidth * 2 * scale}
y={control.Y - screenSpaceLineWidth * 2 * scale}
cx={control.X}
cy={control.Y}
r={screenSpaceLineWidth * 2 * scale}
opacity={this.controlUndo ? 0.15 : 1}
height={screenSpaceLineWidth * 4 * scale}
width={screenSpaceLineWidth * 4 * scale}
strokeWidth={screenSpaceLineWidth / 2}
stroke={Colors.MEDIUM_BLUE}
fill={broken ? Colors.MEDIUM_BLUE : color}
onPointerDown={(e: any) => this.onControlDown(e, control.I)}
onMouseEnter={() => this.onEnterControl(control.I)}
onMouseLeave={this.onLeaveControl}
pointerEvents="all"
cursor="default"
/>;
};
return (<svg>
{!nearestScreenPt ? (null) :
<circle key={"npt"}
cx={nearestScreenPt.X}
cy={nearestScreenPt.Y}
r={screenSpaceLineWidth * 2}
fill={"#00007777"}
stroke={"#00007777"}
strokeWidth={0}
pointerEvents="none"
/>
}
{sreenCtrlPoints.map(control => hdl(control, this._overControl !== control.I ? 1 : 3 / 2, Colors.WHITE))}
</svg>
);
}
}
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