amap-shapes-generator/lib/Utils.js

"use strict";
exports.__esModule = true;
/*
    205.395583333332 = 205°23'44.1"
    1，直接读取"度"：205
    2，(205.395583333332-205)*60=23.734999999920 得到"分"：23
    3，(23.734999999920-23)*60=44.099999995200 得到"秒"：44.1
    return string,
*/
function latLngDecimalToDegrees(decimal) {
    var absDecimal = Math.abs(decimal);
    var isNegative = Math.abs(decimal) != decimal;
    var d = Math.floor(absDecimal); //度
    var m = Math.floor((absDecimal - d) * 60); //分
    var s = Math.round((absDecimal - d) * 3600 % 60); //秒
    if (s == 60) {
        s = 0;
        m++;
    }
    if (m == 60) {
        m = 0;
        d++;
    }
    //d = ('000'+d).slice(-3);                   // left-pad with leading zeros
    var mm = ('00' + m).slice(-2); // left-pad with leading zeros
    var ss = ('00' + s).slice(-2);
    //if (s<10) s = '0' + s;                     // left-pad with leading zeros (note may include decimals)
    return (isNegative ? "-" : "") + d + '°' + mm + "′" + ss + '″';
}
exports.latLngDecimalToDegrees = latLngDecimalToDegrees;
/*
    Decimal Degrees = Degrees + minutes/60 + seconds/3600
    例：57°55'56.6" =57+55/60+56.6/3600=57.9323888888888
    return Float or NaN
*/
function latLngDegreesToDecimal(degreesStr) {
    var degreesArr = degreesStr.split("°");
    var degrees = parseInt(degreesArr[0]);
    var isNegative = Math.abs(degrees) != degrees;
    if (degreesArr.length == 1) {
        return degrees;
    }
    else if (!isSafeString(degreesArr[1])) {
        return degrees;
    }
    var minutesArr = degreesArr[1].split("′");
    var minutes = parseInt(minutesArr[0]);
    var min = parseFloat((isNegative ? "-" : "") + (Math.abs(degrees) + Math.abs(minutes) / 60));
    if (minutesArr.length == 1) {
        return min;
    }
    else if (!isSafeString(minutesArr[1])) {
        return min;
    }
    var secondsStr = minutesArr[1];
    var secondsArr = secondsStr.split('″');
    var seconds = parseFloat(secondsArr[0]);
    return parseFloat((isNegative ? "-" : "") + (Math.abs(degrees) + Math.abs(minutes) / 60 + Math.abs(seconds) / 3600));
}
exports.latLngDegreesToDecimal = latLngDegreesToDecimal;
function isObject(arg) {
    return typeof arg === 'object' && arg !== null;
}
exports.isObject = isObject;
function isUndefined(arg) {
    return arg === void 0;
}
exports.isUndefined = isUndefined;
function isString(arg) {
    return typeof arg === 'string';
}
exports.isString = isString;
function isSafeString(arg) {
    if (isUndefined(arg)) {
        return false;
    }
    if (!isString(arg)) {
        return false;
    }
    if (arg.length == 0) {
        return false;
    }
    return true;
}
exports.isSafeString = isSafeString;
function isNumber(arg) {
    return typeof arg === 'number';
}
exports.isNumber = isNumber;
function hasPoint(obj) {
    return (isObject(obj)
        && isSafeString(obj.lat)
        && isSafeString(obj.lng));
}
exports.hasPoint = hasPoint;