114 lines
3.9 KiB
TypeScript
114 lines
3.9 KiB
TypeScript
import type { KeyboardEvent as ReactKeyboardEvent } from 'react';
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import type { Dimensions, Node, XYPosition, CoordinateExtent, Box, Rect } from '../types';
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export const getDimensions = (node: HTMLDivElement): Dimensions => ({
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width: node.offsetWidth,
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height: node.offsetHeight,
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});
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export const clamp = (val: number, min = 0, max = 1): number => Math.min(Math.max(val, min), max);
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export const clampPosition = (position: XYPosition = { x: 0, y: 0 }, extent: CoordinateExtent) => ({
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x: clamp(position.x, extent[0][0], extent[1][0]),
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y: clamp(position.y, extent[0][1], extent[1][1]),
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});
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// returns a number between 0 and 1 that represents the velocity of the movement
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// when the mouse is close to the edge of the canvas
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const calcAutoPanVelocity = (value: number, min: number, max: number): number => {
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if (value < min) {
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return clamp(Math.abs(value - min), 1, 50) / 50;
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} else if (value > max) {
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return -clamp(Math.abs(value - max), 1, 50) / 50;
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}
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return 0;
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};
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export const calcAutoPan = (pos: XYPosition, bounds: Dimensions): number[] => {
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const xMovement = calcAutoPanVelocity(pos.x, 35, bounds.width - 35) * 20;
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const yMovement = calcAutoPanVelocity(pos.y, 35, bounds.height - 35) * 20;
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return [xMovement, yMovement];
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};
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export const getHostForElement = (element: HTMLElement): Document | ShadowRoot =>
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(element.getRootNode?.() as Document | ShadowRoot) || window?.document;
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export const getBoundsOfBoxes = (box1: Box, box2: Box): Box => ({
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x: Math.min(box1.x, box2.x),
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y: Math.min(box1.y, box2.y),
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x2: Math.max(box1.x2, box2.x2),
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y2: Math.max(box1.y2, box2.y2),
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});
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export const rectToBox = ({ x, y, width, height }: Rect): Box => ({
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x,
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y,
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x2: x + width,
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y2: y + height,
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});
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export const boxToRect = ({ x, y, x2, y2 }: Box): Rect => ({
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x,
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y,
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width: x2 - x,
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height: y2 - y,
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});
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export const nodeToRect = (node: Node): Rect => ({
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...(node.positionAbsolute || { x: 0, y: 0 }),
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width: node.width || 0,
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height: node.height || 0,
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});
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export const getBoundsOfRects = (rect1: Rect, rect2: Rect): Rect =>
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boxToRect(getBoundsOfBoxes(rectToBox(rect1), rectToBox(rect2)));
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export const getOverlappingArea = (rectA: Rect, rectB: Rect): number => {
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const xOverlap = Math.max(0, Math.min(rectA.x + rectA.width, rectB.x + rectB.width) - Math.max(rectA.x, rectB.x));
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const yOverlap = Math.max(0, Math.min(rectA.y + rectA.height, rectB.y + rectB.height) - Math.max(rectA.y, rectB.y));
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return Math.ceil(xOverlap * yOverlap);
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};
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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export const isRectObject = (obj: any): obj is Rect =>
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isNumeric(obj.width) && isNumeric(obj.height) && isNumeric(obj.x) && isNumeric(obj.y);
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/* eslint-disable-next-line @typescript-eslint/no-explicit-any */
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export const isNumeric = (n: any): n is number => !isNaN(n) && isFinite(n);
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export const internalsSymbol = Symbol.for('internals');
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// used for a11y key board controls for nodes and edges
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export const elementSelectionKeys = ['Enter', ' ', 'Escape'];
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export const devWarn = (message: string) => {
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if (process.env.NODE_ENV === 'development') {
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console.warn(`[React Flow]: ${message}`);
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}
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};
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const isReactKeyboardEvent = (event: KeyboardEvent | ReactKeyboardEvent): event is ReactKeyboardEvent =>
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'nativeEvent' in event;
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export function isInputDOMNode(event: KeyboardEvent | ReactKeyboardEvent): boolean {
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const kbEvent = isReactKeyboardEvent(event) ? event.nativeEvent : event;
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// using composed path for handling shadow dom
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const target = (kbEvent.composedPath?.()?.[0] || event.target) as HTMLElement;
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// we want to be able to do a multi selection event if we are in an input field
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if (event.ctrlKey || event.metaKey || event.shiftKey) {
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return false;
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}
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// when an input field is focused we don't want to trigger deletion or movement of nodes
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return (
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['INPUT', 'SELECT', 'TEXTAREA'].includes(target?.nodeName) ||
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target?.hasAttribute('contenteditable') ||
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!!target?.closest('.nokey')
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);
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}
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