# Code coverage report for src/geo/LatLngBounds.js

## Statements: 100% (55 / 55) Branches: 97.67% (42 / 43) Functions: 100% (18 / 18) Lines: 100% (53 / 53)

All files » src/geo/ » LatLngBounds.js

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     /*
     * L.LatLngBounds represents a rectangular area on the map in geographical coordinates.
     */

    L.LatLngBounds = function (southWest, northEast) { // (LatLng, LatLng) or (LatLng[])
    	if (!southWest) { return; }

    	var latlngs = northEast ? [southWest, northEast] : southWest;

    	for (var i = 0, len = latlngs.length; i < len; i++) {
    		this.extend(latlngs[i]);
    	}
    };

    L.LatLngBounds.prototype = {
    	// extend the bounds to contain the given point or bounds
    	extend: function (obj) { // (LatLng) or (LatLngBounds)
    		if (typeof obj[0] === 'number' || typeof obj[0] === 'string' || obj instanceof L.LatLng) {
    			obj = L.latLng(obj);
    		} else {
    			obj = L.latLngBounds(obj);
    		}

    		if (obj instanceof L.LatLng) {
    			if (!this._southWest && !this._northEast) {
    				this._southWest = new L.LatLng(obj.lat, obj.lng);
    				this._northEast = new L.LatLng(obj.lat, obj.lng);
    			} else {
    				this._southWest.lat = Math.min(obj.lat, this._southWest.lat);
    				this._southWest.lng = Math.min(obj.lng, this._southWest.lng);

    				this._northEast.lat = Math.max(obj.lat, this._northEast.lat);
    				this._northEast.lng = Math.max(obj.lng, this._northEast.lng);
    			}
    		} else Eif (obj instanceof L.LatLngBounds) {
    			this.extend(obj._southWest);
    			this.extend(obj._northEast);
    		}
    		return this;
    	},

    	// extend the bounds by a percentage
    	pad: function (bufferRatio) { // (Number) -> LatLngBounds
    		var sw = this._southWest,
    		    ne = this._northEast,
    		    heightBuffer = Math.abs(sw.lat - ne.lat) * bufferRatio,
    		    widthBuffer = Math.abs(sw.lng - ne.lng) * bufferRatio;

    		return new L.LatLngBounds(
    		        new L.LatLng(sw.lat - heightBuffer, sw.lng - widthBuffer),
    		        new L.LatLng(ne.lat + heightBuffer, ne.lng + widthBuffer));
    	},

    	getCenter: function () { // -> LatLng
    		return new L.LatLng(
    		        (this._southWest.lat + this._northEast.lat) / 2,
    		        (this._southWest.lng + this._northEast.lng) / 2);
    	},

    	getSouthWest: function () {
    		return this._southWest;
    	},

    	getNorthEast: function () {
    		return this._northEast;
    	},

    	getNorthWest: function () {
    		return new L.LatLng(this.getNorth(), this.getWest());
    	},

    	getSouthEast: function () {
    		return new L.LatLng(this.getSouth(), this.getEast());
    	},

    	getWest: function () {
    		return this._southWest.lng;
    	},

    	getSouth: function () {
    		return this._southWest.lat;
    	},

    	getEast: function () {
    		return this._northEast.lng;
    	},

    	getNorth: function () {
    		return this._northEast.lat;
    	},

    	contains: function (obj) { // (LatLngBounds) or (LatLng) -> Boolean
    		if (typeof obj[0] === 'number' || obj instanceof L.LatLng) {
    			obj = L.latLng(obj);
    		} else {
    			obj = L.latLngBounds(obj);
    		}

    		var sw = this._southWest,
    		    ne = this._northEast,
    		    sw2, ne2;

    		if (obj instanceof L.LatLngBounds) {
    			sw2 = obj.getSouthWest();
    			ne2 = obj.getNorthEast();
    		} else {
    			sw2 = ne2 = obj;
    		}

    		return (sw2.lat >= sw.lat) && (ne2.lat <= ne.lat) &&
    		       (sw2.lng >= sw.lng) && (ne2.lng <= ne.lng);
    	},

    	intersects: function (bounds) { // (LatLngBounds)
    		bounds = L.latLngBounds(bounds);

    		var sw = this._southWest,
    		    ne = this._northEast,
    		    sw2 = bounds.getSouthWest(),
    		    ne2 = bounds.getNorthEast(),

    		    latIntersects = (ne2.lat >= sw.lat) && (sw2.lat <= ne.lat),
    		    lngIntersects = (ne2.lng >= sw.lng) && (sw2.lng <= ne.lng);

    		return latIntersects && lngIntersects;
    	},

    	toBBoxString: function () {
    		return [this.getWest(), this.getSouth(), this.getEast(), this.getNorth()].join(',');
    	},

    	equals: function (bounds) { // (LatLngBounds)
    		if (!bounds) { return false; }

    		bounds = L.latLngBounds(bounds);

    		return this._southWest.equals(bounds.getSouthWest()) &&
    		       this._northEast.equals(bounds.getNorthEast());
    	},

    	isValid: function () {
    		return !!(this._southWest && this._northEast);
    	}
    };

    //TODO International date line?

    L.latLngBounds = function (a, b) { // (LatLngBounds) or (LatLng, LatLng)
    	if (!a || a instanceof L.LatLngBounds) {
    		return a;
    	}
    	return new L.LatLngBounds(a, b);
    };