@ariakit/react-core
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Ariakit React core
86 lines (80 loc) • 2.56 kB
JavaScript
;Object.defineProperty(exports, "__esModule", {value: true});// src/hovercard/utils/polygon.ts
function getEventPoint(event) {
return [event.clientX, event.clientY];
}
function isPointInPolygon(point, polygon) {
const [x, y] = point;
let inside = false;
const length = polygon.length;
for (let l = length, i = 0, j = l - 1; i < l; j = i++) {
const [xi, yi] = polygon[i];
const [xj, yj] = polygon[j];
const [, vy] = polygon[j === 0 ? l - 1 : j - 1] || [0, 0];
const where = (yi - yj) * (x - xi) - (xi - xj) * (y - yi);
if (yj < yi) {
if (y >= yj && y < yi) {
if (where === 0) return true;
if (where > 0) {
if (y === yj) {
if (y > vy) {
inside = !inside;
}
} else {
inside = !inside;
}
}
}
} else if (yi < yj) {
if (y > yi && y <= yj) {
if (where === 0) return true;
if (where < 0) {
if (y === yj) {
if (y < vy) {
inside = !inside;
}
} else {
inside = !inside;
}
}
}
} else if (y === yi && (x >= xj && x <= xi || x >= xi && x <= xj)) {
return true;
}
}
return inside;
}
function getEnterPointPlacement(enterPoint, rect) {
const { top, right, bottom, left } = rect;
const [x, y] = enterPoint;
const placementX = x < left ? "left" : x > right ? "right" : null;
const placementY = y < top ? "top" : y > bottom ? "bottom" : null;
return [placementX, placementY];
}
function getElementPolygon(element, enterPoint) {
const rect = element.getBoundingClientRect();
const { top, right, bottom, left } = rect;
const [x, y] = getEnterPointPlacement(enterPoint, rect);
const polygon = [enterPoint];
if (x) {
if (y !== "top") {
polygon.push([x === "left" ? left : right, top]);
}
polygon.push([x === "left" ? right : left, top]);
polygon.push([x === "left" ? right : left, bottom]);
if (y !== "bottom") {
polygon.push([x === "left" ? left : right, bottom]);
}
} else if (y === "top") {
polygon.push([left, top]);
polygon.push([left, bottom]);
polygon.push([right, bottom]);
polygon.push([right, top]);
} else {
polygon.push([left, bottom]);
polygon.push([left, top]);
polygon.push([right, top]);
polygon.push([right, bottom]);
}
return polygon;
}
exports.getEventPoint = getEventPoint; exports.isPointInPolygon = isPointInPolygon; exports.getElementPolygon = getElementPolygon;