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: / var / canvas / node_modules / react-use / lib /
Filename : useMouse.js
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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var react_1 = require("react");
var useRafState_1 = tslib_1.__importDefault(require("./useRafState"));
var util_1 = require("./misc/util");
var useMouse = function (ref) {
    if (process.env.NODE_ENV === 'development') {
        if (typeof ref !== 'object' || typeof ref.current === 'undefined') {
            console.error('useMouse expects a single ref argument.');
        }
    }
    var _a = useRafState_1.default({
        docX: 0,
        docY: 0,
        posX: 0,
        posY: 0,
        elX: 0,
        elY: 0,
        elH: 0,
        elW: 0,
    }), state = _a[0], setState = _a[1];
    react_1.useEffect(function () {
        var moveHandler = function (event) {
            if (ref && ref.current) {
                var _a = ref.current.getBoundingClientRect(), left = _a.left, top_1 = _a.top, elW = _a.width, elH = _a.height;
                var posX = left + window.pageXOffset;
                var posY = top_1 + window.pageYOffset;
                var elX = event.pageX - posX;
                var elY = event.pageY - posY;
                setState({
                    docX: event.pageX,
                    docY: event.pageY,
                    posX: posX,
                    posY: posY,
                    elX: elX,
                    elY: elY,
                    elH: elH,
                    elW: elW,
                });
            }
        };
        util_1.on(document, 'mousemove', moveHandler);
        return function () {
            util_1.off(document, 'mousemove', moveHandler);
        };
    }, [ref]);
    return state;
};
exports.default = useMouse;