90 lines
2.2 KiB
TypeScript
90 lines
2.2 KiB
TypeScript
import { ExcalidrawElement } from "./types";
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export function isInvisiblySmallElement(element: ExcalidrawElement): boolean {
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return element.width === 0 && element.height === 0;
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}
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/**
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* Makes a perfect shape or diagonal/horizontal/vertical line
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*/
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export function getPerfectElementSize(
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elementType: string,
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width: number,
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height: number,
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): { width: number; height: number } {
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const absWidth = Math.abs(width);
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const absHeight = Math.abs(height);
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if (elementType === "line" || elementType === "arrow") {
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if (absHeight < absWidth / 2) {
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height = 0;
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} else if (absWidth < absHeight / 2) {
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width = 0;
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} else {
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height = absWidth * Math.sign(height);
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}
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} else if (elementType !== "selection") {
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height = absWidth * Math.sign(height);
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}
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return { width, height };
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}
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export function resizePerfectLineForNWHandler(
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element: ExcalidrawElement,
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x: number,
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y: number,
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) {
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const anchorX = element.x + element.width;
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const anchorY = element.y + element.height;
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const distanceToAnchorX = x - anchorX;
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const distanceToAnchorY = y - anchorY;
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if (Math.abs(distanceToAnchorX) < Math.abs(distanceToAnchorY) / 2) {
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element.x = anchorX;
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element.width = 0;
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element.y = y;
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element.height = -distanceToAnchorY;
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} else if (Math.abs(distanceToAnchorY) < Math.abs(element.width) / 2) {
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element.y = anchorY;
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element.height = 0;
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} else {
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element.x = x;
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element.width = -distanceToAnchorX;
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element.height =
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Math.sign(distanceToAnchorY) *
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Math.sign(distanceToAnchorX) *
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element.width;
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element.y = anchorY - element.height;
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}
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}
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/**
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* @returns {boolean} whether element was normalized
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*/
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export function normalizeDimensions(
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element: ExcalidrawElement | null,
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): element is ExcalidrawElement {
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if (
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!element ||
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(element.width >= 0 && element.height >= 0) ||
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element.type === "line" ||
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element.type === "arrow"
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) {
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return false;
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}
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if (element.width < 0) {
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element.width = Math.abs(element.width);
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element.x -= element.width;
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}
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if (element.height < 0) {
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element.height = Math.abs(element.height);
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element.y -= element.height;
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}
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element.shape = null;
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return true;
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}
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