all files / utils/ Utils.js

96.15% Statements 75/78
90% Branches 27/30
93.33% Functions 14/15
96% Lines 72/75
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/**
 * @author syt123450 / https://github.com/syt123450
 * @author mokuteno / https://github.com/manymeeting
 */
 
import { CountryColorMap } from "../countryInfo/CountryColorMap.js";
 
/**
 * it contains static function, the functions will be called by other component in whole project.
 * The stateless function can be added here.
 */
 
var Utils = ( function () {
 
    function isString( str ) {
 
        return ( typeof str === 'string' ) && str.constructor === String;
 
    }
 
    function transformStringToHex( str ) {
 
        if ( str.charAt( 0 ) !== "#" ) {
 
            return null;
 
        }
 
        return parseInt( str.substring( 1 ), 16 );
 
    }
 
    function formatHexColor( color ) {
 
        if ( color < 0 || color > 16777215 ) {
 
            return null;
 
        }
 
        return color;
 
    }
 
    function getElementViewTop ( element ){
 
        var actualTop = element.offsetTop;
        var current = element.offsetParent;
    
        while ( current !== null ) {
 
            actualTop += current.offsetTop;
            current = current.offsetParent;
 
        }
 
        var elementScrollTop;
 
        if ( document.compatMode === "BackCompat" ) {
 
            elementScrollTop = document.body.scrollTop;
 
	    } else {
 
            Iif ( document.documentElement.scrollTop === 0 ) {
 
                elementScrollTop = document.body.scrollTop;
 
	        } else {
 
                elementScrollTop = document.documentElement.scrollTop;
 
            }
 
        }
 
        return actualTop - elementScrollTop;
 
    }
 
    function getElementViewLeft ( element ) {
 
        var actualLeft = element.offsetLeft;
        var current = element.offsetParent;
        
        while ( current !== null ) {
 
            actualLeft += current.offsetLeft;
            current = current.offsetParent;
 
        }
 
        var elementScrollLeft;
 
	    if ( document.compatMode === "BackCompat" ) {
 
	        elementScrollLeft = document.body.scrollLeft;
 
        } else {
 
            Iif ( document.documentElement.scrollTop === 0 ) {
 
                elementScrollLeft = document.body.scrollLeft;
 
            } else {
 
                elementScrollLeft = document.documentElement.scrollLeft;
 
            }
 
        }
 
        return actualLeft - elementScrollLeft;
 
    }
 
    function isArray( value ) {
 
        return Array.isArray( value );
 
    }
 
 
    return {
 
        // temporarily constrain value to ( -Math.PI, Math.PI )
 
        wrap: function ( value, min, range ) {
 
            range -= min;
 
            while ( value < min ) {
 
                value += range;
 
            }
 
            return value % range;
 
        },
 
        // constrain the value in a range
 
        constrain: function ( v, min, max ) {
 
            if ( v < min ) {
 
                v = min;
 
            } else if ( v > max ) {
 
                v = max;
 
            }
 
            return v;
 
        },
 
        // format code to hex type (the input may "#000000" or 0x000000)
 
        formatColor: function ( color ) {
 
            if ( isString( color ) ) {
 
                return transformStringToHex( color );
 
            } else {
 
                return formatHexColor( color );
 
            }
 
        },
 
        // transform brightness from user's input (0 - 1) to (min - max)
 
        transformBrightness: function ( brightness, min, max ) {
 
            if ( brightness > 1 ) {
 
                return max;
 
            }
 
            if ( brightness < 0 ) {
 
                return min;
 
            }
 
            return Math.floor( min + ( max - min ) * brightness );
 
        },
 
        // deep clone an object from a country data, add more information for user's callback
 
        transformCountryData: function ( countryData ) {
 
            var outputData = {};
 
            outputData.name = countryData.name;
            outputData.lat = countryData.lat;
            outputData.lon = countryData.lon;
            outputData.center = countryData.center.clone();
            outputData.ISOCode = CountryColorMap[ countryData.colorCode ];
 
            return outputData;
 
        },
 
        /**
        * Flatten country data based on given min and max value.
        *
        * @param {Array} data
        *   An array of data to be processed.
        *   Example: [
        *      {
        *        "e": "CN",
        *        "i": "US",
        *        "v": 3300000
        *      },
        *      {
        *        "e": "CN",
        *        "i": "RU",
        *        "v": 10000
        *      }
        *    ]
        * @param {string} valueKey
        * @param {number} definedMin
        * @param {number} definedMax
        */
 
        flattenCountryData: function ( data, valueKey, definedMin, definedMax ) {
            if ( data.length === 0 )
                return;
    
            var values = data.map( function ( countryData ) {
                return countryData[ valueKey ];
            });
            var min = Math.min.apply( null, values );
            var max = Math.max.apply( null, values );
            
            data.forEach( function ( country ) {
 
                var v = country[ valueKey ];
 
                Eif (( max - min ) !== 0) {
                    country[ valueKey ] = ( v - min ) * ( definedMax - definedMin ) / ( max - min ) + definedMin;
                }
 
            } );
 
        },
 
        getElementViewTop: getElementViewTop,
 
        getElementViewLeft: getElementViewLeft,
 
		isArray: isArray
 
    };
 
}() );
 
export { Utils };