google-map-react/src/google_map.js at master · derdrdirk/google-map-react · GitHub

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import React, { PropTypes, Component } from 'react';

import ReactDOM from 'react-dom';

import shallowEqual from 'fbjs/lib/shallowEqual';

import MarkerDispatcher from './marker_dispatcher';

import GoogleMapMap from './google_map_map';

import GoogleMapMarkers from './google_map_markers';

import GoogleMapMarkersPrerender from './google_map_markers_prerender';

import googleMapLoader from './utils/loaders/google_map_loader';

import detectBrowser from './utils/detect';

import Geo from './utils/geo';

import isArraysEqualEps from './utils/array_helper';

import isPlainObject from './utils/is_plain_object';

import pick from './utils/pick';

import raf from './utils/raf';

import log2 from './utils/math/log2';

import isNumber from './utils/isNumber';

import omit from './utils/omit';

import detectElementResize from './utils/detectElementResize';

const kEPS = 0.00001;

const K_GOOGLE_TILE_SIZE = 256;

// real minZoom calculated here _getMinZoom

const K_IDLE_TIMEOUT = 100;

const K_IDLE_CLICK_TIMEOUT = 300;

const DEFAULT_MIN_ZOOM = 3;

function defaultOptions_(/* maps */) {

return {

overviewMapControl: false,

streetViewControl: false,

rotateControl: true,

mapTypeControl: false,

// disable poi

styles: [{ featureType: 'poi', elementType: 'labels', stylers: [{ visibility: 'off' }] }],

minZoom: DEFAULT_MIN_ZOOM, // dynamically recalculted if possible during init

};

}

const latLng2Obj = (latLng) => isPlainObject(latLng)

? latLng

: { lat: latLng[0], lng: latLng[1] };

export default class GoogleMap extends Component {

static propTypes = {

apiKey: PropTypes.string,

bootstrapURLKeys: PropTypes.any,

defaultCenter: React.PropTypes.oneOfType([

PropTypes.array,

PropTypes.shape({

lat: PropTypes.number,

lng: PropTypes.number,

}),

]),

center: React.PropTypes.oneOfType([

PropTypes.array,

PropTypes.shape({

lat: PropTypes.number,

lng: PropTypes.number,

}),

]),

defaultZoom: PropTypes.number,

zoom: PropTypes.number,

onBoundsChange: PropTypes.func,

onChange: PropTypes.func,

onClick: PropTypes.func,

onChildClick: PropTypes.func,

onChildMouseDown: PropTypes.func,

onChildMouseUp: PropTypes.func,

onChildMouseMove: PropTypes.func,

onChildMouseEnter: PropTypes.func,

onChildMouseLeave: PropTypes.func,

onZoomAnimationStart: PropTypes.func,

onZoomAnimationEnd: PropTypes.func,

onDrag: PropTypes.func,

onMapTypeIdChange: PropTypes.func,

options: PropTypes.any,

distanceToMouse: PropTypes.func,

hoverDistance: PropTypes.number,

debounced: PropTypes.bool,

margin: PropTypes.array,

googleMapLoader: PropTypes.any,

onGoogleApiLoaded: PropTypes.func,

yesIWantToUseGoogleMapApiInternals: PropTypes.bool,

draggable: PropTypes.bool,

style: PropTypes.any,

resetBoundsOnResize: PropTypes.bool,

layerTypes: PropTypes.arrayOf(PropTypes.string), // ['TransitLayer', 'TrafficLayer']

};

static defaultProps = {

distanceToMouse(pt, mousePos /* , markerProps */) {

return Math.sqrt(

(pt.x - mousePos.x) * (pt.x - mousePos.x) + (pt.y - mousePos.y) * (pt.y - mousePos.y)

);

hoverDistance: 30,

debounced: true,

options: defaultOptions_,

googleMapLoader,

yesIWantToUseGoogleMapApiInternals: false,

style: {

width: '100%',

height: '100%',

margin: 0,

padding: 0,

position: 'relative',

layerTypes: [],

};

static googleMapLoader = googleMapLoader; // eslint-disable-line

constructor(props) {

super(props);

this.mounted_ = false;

this.initialized_ = false;

this.googleApiLoadedCalled_ = false;

this.map_ = null;

this.maps_ = null;

this.prevBounds_ = null;

this.layers_ = {};

this.mouse_ = null;

this.mouseMoveTime_ = 0;

this.boundingRect_ = null;

this.mouseInMap_ = true;

this.dragTime_ = 0;

this.fireMouseEventOnIdle_ = false;

this.updateCounter_ = 0;

this.markersDispatcher_ = new MarkerDispatcher(this);

this.geoService_ = new Geo(K_GOOGLE_TILE_SIZE);

this.centerIsObject_ = isPlainObject(this.props.center);

this.minZoom_ = DEFAULT_MIN_ZOOM;

this.defaultDraggableOption_ = true;

this.zoomControlClickTime_ = 0;

this.childMouseDownArgs_ = null;

this.childMouseUpTime_ = 0;

if (process.env.NODE_ENV !== 'production') {

if (this.props.apiKey) {

console.warn('GoogleMap: ' + // eslint-disable-line no-console

'apiKey is deprecated, use ' +

'bootstrapURLKeys={{key: YOUR_API_KEY}} instead.');

}

if (this.props.onBoundsChange) {

console.warn('GoogleMap: ' + // eslint-disable-line no-console

'onBoundsChange is deprecated, use ' +

'onChange({center, zoom, bounds, ...other}) instead.');

}

if (this.props.center === undefined && this.props.defaultCenter === undefined) {

console.warn('GoogleMap: center or defaultCenter' + // eslint-disable-line no-console

'property must be defined');

}

if (this.props.zoom === undefined && this.props.defaultZoom === undefined) {

console.warn('GoogleMap: zoom or defaultZoom' + // eslint-disable-line no-console

'property must be defined');

}

if (this._isCenterDefined(this.props.center || this.props.defaultCenter)) {

const propsCenter = latLng2Obj(this.props.center || this.props.defaultCenter);

this.geoService_.setView(propsCenter, this.props.zoom || this.props.defaultZoom, 0);

}

this.zoomAnimationInProgress_ = false;

this.state = {

overlayCreated: false,

};

}

componentDidMount() {

this.mounted_ = true;

window.addEventListener('resize', this._onWindowResize);

window.addEventListener('keydown', this._onKeyDownCapture, true);

const mapDom = ReactDOM.findDOMNode(this.refs.google_map_dom);

// gmap can't prevent map drag if mousedown event already occured

// the only workaround I find is prevent mousedown native browser event

ReactDOM.findDOMNode(this.refs.google_map_dom)

.addEventListener('mousedown', this._onMapMouseDownNative, true);

window.addEventListener('mouseup', this._onChildMouseUp, false);

const bootstrapURLKeys = {

...(this.props.apiKey && { key: this.props.apiKey }),

...this.props.bootstrapURLKeys,

};

this.props.googleMapLoader(bootstrapURLKeys); // we can start load immediatly

setTimeout(() => { // to detect size

this._setViewSize();

if (this._isCenterDefined(this.props.center || this.props.defaultCenter)) {

this._initMap();

}

}, 0, this);

if (this.props.resetBoundsOnResize) {

const that = this;

detectElementResize.addResizeListener(mapDom, that._mapDomResizeCallback);

}

componentWillReceiveProps(nextProps) {

if (process.env.NODE_ENV !== 'production') {

if (this.props.defaultCenter !== nextProps.defaultCenter) {

console.warn('GoogleMap: defaultCenter prop changed. ' + // eslint-disable-line

'You can\'t change default props.');

}

if (this.props.defaultZoom !== nextProps.defaultZoom) {

console.warn('GoogleMap: defaultZoom prop changed. ' + // eslint-disable-line

'You can\'t change default props.');

}

if (!this._isCenterDefined(this.props.center) && this._isCenterDefined(nextProps.center)) {

setTimeout(() =>

this._initMap(), 0);

}

if (this.map_) {

const centerLatLng = this.geoService_.getCenter();

if (this._isCenterDefined(nextProps.center)) {

const nextPropsCenter = latLng2Obj(nextProps.center);

const currCenter = this._isCenterDefined(this.props.center) ?

latLng2Obj(this.props.center) :

null;

if (

!currCenter ||

Math.abs(nextPropsCenter.lat - currCenter.lat) +

Math.abs(nextPropsCenter.lng - currCenter.lng) > kEPS

) {

if (

Math.abs(nextPropsCenter.lat - centerLatLng.lat) +

Math.abs(nextPropsCenter.lng - centerLatLng.lng) > kEPS

) {

this.map_.panTo({ lat: nextPropsCenter.lat, lng: nextPropsCenter.lng });

}

if (nextProps.zoom !== undefined) {

// if zoom chaged by user

if (Math.abs(nextProps.zoom - this.props.zoom) > 0) {

this.map_.setZoom(nextProps.zoom);

}

if (this.props.draggable !== undefined && nextProps.draggable === undefined) {

// reset to default

this.map_.setOptions({ draggable: this.defaultDraggableOption_ });

} else if (this.props.draggable !== nextProps.draggable) {

// also prevent this on window 'mousedown' event to prevent map move

this.map_.setOptions({ draggable: nextProps.draggable });

}

// use shallowEqual to try avoid calling map._setOptions if only the ref changes

if (nextProps.options !== undefined && !shallowEqual(this.props.options, nextProps.options)) {

const mapPlainObjects = pick(this.maps_, isPlainObject);

let options = typeof nextProps.options === 'function'

? nextProps.options(mapPlainObjects)

: nextProps.options;

// remove zoom, center and draggable options as these are managed by google-maps-react

options = omit(options, ['zoom', 'center', 'draggable']);

if (options.hasOwnProperty('minZoom')) {

const minZoom = this._computeMinZoom(options.minZoomOverride, options.minZoom);

options.minZoom = this._checkMinZoom(options.minZoom, minZoom);

}

this.map_.setOptions(options);

}

if (nextProps.layerTypes !== this.props.layerTypes) {

for (const layerKey of Object.keys(this.layers_)) {

this.layers_[layerKey].setMap(null);

delete this.layers_[layerKey];

}

this._setLayers(nextProps.layerTypes);

}

shouldComponentUpdate(nextProps, nextState) {

// draggable does not affect inner components

return !shallowEqual(

omit(this.props, ['draggable']),

omit(nextProps, ['draggable'])

) || !shallowEqual(this.state, nextState);

}

componentDidUpdate(prevProps) {

this.markersDispatcher_.emit('kON_CHANGE');

if (this.props.hoverDistance !== prevProps.hoverDistance) {

this.markersDispatcher_.emit('kON_MOUSE_POSITION_CHANGE');

}

componentWillUnmount() {

this.mounted_ = false;

const mapDom = ReactDOM.findDOMNode(this.refs.google_map_dom);

window.removeEventListener('resize', this._onWindowResize);

window.removeEventListener('keydown', this._onKeyDownCapture);

mapDom.removeEventListener('mousedown', this._onMapMouseDownNative, true);

window.removeEventListener('mouseup', this._onChildMouseUp, false);

if (this.props.resetBoundsOnResize) {

detectElementResize.removeResizeListener(mapDom, this._mapDomResizeCallback);

}

if (this.overlay_) {

// this triggers overlay_.onRemove(), which will unmount the <GoogleMapMarkers/>

this.overlay_.setMap(null);

}

if (this.maps_ && this.map_) {

// fix google, as otherwise listeners works even without map

this.map_.setOptions({ scrollwheel: false });

this.maps_.event.clearInstanceListeners(this.map_);

}

this.map_ = null;

this.maps_ = null;

this.markersDispatcher_.dispose();

this.resetSizeOnIdle_ = false;

delete this.map_;

delete this.markersDispatcher_;

}

// calc minZoom if map size available

// it's better to not set minZoom less than this calculation gives

// otherwise there is no homeomorphism between screen coordinates and map

// (one map coordinate can have different screen coordinates)

_getMinZoom = () => {

if (this.geoService_.getWidth() > 0 || this.geoService_.getHeight() > 0) {

const tilesPerWidth = Math.ceil(this.geoService_.getWidth() / K_GOOGLE_TILE_SIZE) + 2;

const tilesPerHeight = Math.ceil(this.geoService_.getHeight() / K_GOOGLE_TILE_SIZE) + 2;

const maxTilesPerDim = Math.max(tilesPerWidth, tilesPerHeight);

return Math.ceil(log2(maxTilesPerDim));

}

return DEFAULT_MIN_ZOOM;

}

_computeMinZoom = (minZoomOverride, minZoom) => {

if (minZoomOverride) {

return minZoom || DEFAULT_MIN_ZOOM;

}

return this._getMinZoom();

}

_checkMinZoom(zoom, minZoom) {

if (process.env.NODE_ENV !== 'production') {

if (zoom < minZoom) {

console.warn( 'GoogleMap: ' + // eslint-disable-line

'minZoom option is less than recommended ' +

'minZoom option for your map sizes.\n' +

'overrided to value ' + minZoom);

}

if (minZoom < zoom) {

return zoom;

}

return minZoom;

}

_mapDomResizeCallback = () => {

this.resetSizeOnIdle_ = true;

if (this.maps_) {

const originalCenter = this.map_.getCenter();

this.maps_.event.trigger(this.map_, 'resize');

this.map_.setCenter(originalCenter);

}

_setLayers = (layerTypes) => {

layerTypes.forEach((layerType) => {

this.layers_[layerType] = new this.maps_[layerType]();

this.layers_[layerType].setMap(this.map_);

});

};

_initMap = () => {

// only initialize the map once

if (this.initialized_) {

return;

}

this.initialized_ = true;

const propsCenter = latLng2Obj(this.props.center || this.props.defaultCenter);

this.geoService_.setView(propsCenter, this.props.zoom || this.props.defaultZoom, 0);

this._onBoundsChanged(); // now we can calculate map bounds center etc...

const bootstrapURLKeys = {

...(this.props.apiKey && { key: this.props.apiKey }),

...this.props.bootstrapURLKeys,

};

this.props.googleMapLoader(bootstrapURLKeys)

.then(maps => {

if (!this.mounted_) {

return;

}

const centerLatLng = this.geoService_.getCenter();

const propsOptions = {

zoom: this.props.zoom || this.props.defaultZoom,

center: new maps.LatLng(centerLatLng.lat, centerLatLng.lng),

};

// prevent to exapose full api

// next props must be exposed (console.log(Object.keys(pick(maps, isPlainObject))))

// "Animation", "ControlPosition", "MapTypeControlStyle", "MapTypeId",

// "NavigationControlStyle", "ScaleControlStyle", "StrokePosition",

// "SymbolPath", "ZoomControlStyle",

// "event", "DirectionsStatus", "DirectionsTravelMode", "DirectionsUnitSystem",

// "DistanceMatrixStatus",

// "DistanceMatrixElementStatus", "ElevationStatus", "GeocoderLocationType",

// "GeocoderStatus", "KmlLayerStatus",

// "MaxZoomStatus", "StreetViewStatus", "TransitMode", "TransitRoutePreference",

// "TravelMode", "UnitSystem"

const mapPlainObjects = pick(maps, isPlainObject);

const options = typeof this.props.options === 'function'

? this.props.options(mapPlainObjects)

: this.props.options;

const defaultOptions = defaultOptions_(mapPlainObjects);

const draggableOptions = this.props.draggable !== undefined &&

{ draggable: this.props.draggable };

const minZoom = this._computeMinZoom(options.minZoomOverride, options.minZoom);

this.minZoom_ = minZoom;

const preMapOptions = {

...defaultOptions,

minZoom,

...options,

...propsOptions,

};

this.defaultDraggableOption_ = preMapOptions.draggable !== undefined

? preMapOptions.draggable

: this.defaultDraggableOption_;

const mapOptions = {

...preMapOptions,

...draggableOptions,

};

mapOptions.minZoom = this._checkMinZoom(mapOptions.minZoom, minZoom);

const map = new maps.Map(ReactDOM.findDOMNode(this.refs.google_map_dom), mapOptions);

this.map_ = map;

this.maps_ = maps;

this._setLayers(this.props.layerTypes);

// render in overlay

const this_ = this;

const overlay = this.overlay_ = Object.assign(new maps.OverlayView(), {

onAdd() {

const K_MAX_WIDTH = (typeof screen !== 'undefined') ? `${screen.width}px` : '2000px';

const K_MAX_HEIGHT = (typeof screen !== 'undefined') ? `${screen.height}px` : '2000px';

const div = document.createElement('div');

this.div = div;

div.style.backgroundColor = 'transparent';

div.style.position = 'absolute';

div.style.left = '0px';

div.style.top = '0px';

div.style.width = K_MAX_WIDTH; // prevents some chrome draw defects

div.style.height = K_MAX_HEIGHT;

const panes = this.getPanes();

panes.overlayMouseTarget.appendChild(div);

ReactDOM.unstable_renderSubtreeIntoContainer(

this_,

<GoogleMapMarkers

experimental={this_.props.experimental}

onChildClick={this_._onChildClick}

onChildMouseDown={this_._onChildMouseDown}

onChildMouseEnter={this_._onChildMouseEnter}

onChildMouseLeave={this_._onChildMouseLeave}

geoService={this_.geoService_}

projectFromLeftTop

distanceToMouse={this_.props.distanceToMouse}

getHoverDistance={this_._getHoverDistance}

dispatcher={this_.markersDispatcher_}

/>,

div,

// remove prerendered markers

() => this_.setState({ overlayCreated: true }),

);

onRemove() {

ReactDOM.unmountComponentAtNode(this.div);

draw() {

const div = overlay.div;

const overlayProjection = overlay.getProjection();

const bounds = map.getBounds();

const ne = bounds.getNorthEast();

const sw = bounds.getSouthWest();

const ptx = overlayProjection.fromLatLngToDivPixel(new maps.LatLng(ne.lat(), sw.lng()));

// need round for safari still can't find what need for firefox

const ptxRounded = detectBrowser().isSafari

? { x: Math.round(ptx.x), y: Math.round(ptx.y) }

: { x: ptx.x, y: ptx.y };

this_.updateCounter_++;

this_._onBoundsChanged(map, maps, !this_.props.debounced);

if (!this_.googleApiLoadedCalled_) {

this_._onGoogleApiLoaded({ map, maps });

this_.googleApiLoadedCalled_ = true;

}

div.style.left = `${ptxRounded.x}px`;

div.style.top = `${ptxRounded.y}px`;

if (this_.markersDispatcher_) {

this_.markersDispatcher_.emit('kON_CHANGE');

}

});

overlay.setMap(map);

maps.event.addListener(map, 'zoom_changed', () => {

// recalc position at zoom start

if (this_.geoService_.getZoom() !== map.getZoom()) {

if (!this_.zoomAnimationInProgress_) {

this_.zoomAnimationInProgress_ = true;

this_._onZoomAnimationStart();

}

const TIMEOUT_ZOOM = 300;

if ((new Date()).getTime() - this.zoomControlClickTime_ < TIMEOUT_ZOOM) {

// there is strange Google Map Api behavior in chrome when zoom animation of map

// is started only on second raf call, if was click on zoom control

// or +- keys pressed, so i wait for two rafs before change state

// this does not fully prevent animation jump

// but reduce it's occurence probability

raf(() => raf(() => {

this_.updateCounter_++;

this_._onBoundsChanged(map, maps);

}));

} else {

this_.updateCounter_++;

this_._onBoundsChanged(map, maps);

}

});

maps.event.addListener(map, 'idle', () => {

if (this.resetSizeOnIdle_) {

this._setViewSize();

const currMinZoom = this._computeMinZoom(

this.props.options.minZoomOverride,

this.props.options.minZoom);

if (currMinZoom !== this.minZoom_) {

this.minZoom_ = currMinZoom;

map.setOptions({ minZoom: currMinZoom });

}

this.resetSizeOnIdle_ = false;

}

if (this_.zoomAnimationInProgress_) {

this_.zoomAnimationInProgress_ = false;

this_._onZoomAnimationEnd();

}

const div = overlay.div;

const overlayProjection = overlay.getProjection();

const bounds = map.getBounds();

const ne = bounds.getNorthEast();

const sw = bounds.getSouthWest();

const ptx = overlayProjection.fromLatLngToDivPixel(new maps.LatLng(ne.lat(), sw.lng()));

// need round for safari still can't find what need for firefox

const ptxRounded = detectBrowser().isSafari

? { x: Math.round(ptx.x), y: Math.round(ptx.y) }

: { x: ptx.x, y: ptx.y };

this_.updateCounter_++;

this_._onBoundsChanged(map, maps);

if (this.mouse_) {

const latLng = this.geoService_.unproject(this.mouse_, true);

this.mouse_.lat = latLng.lat;

this.mouse_.lng = latLng.lng;

}

this._onChildMouseMove();

this_.dragTime_ = 0;

div.style.left = `${ptxRounded.x}px`;

div.style.top = `${ptxRounded.y}px`;

if (this_.markersDispatcher_) {

this_.markersDispatcher_.emit('kON_CHANGE');

if (this_.fireMouseEventOnIdle_) {

this_.markersDispatcher_.emit('kON_MOUSE_POSITION_CHANGE');

}

});

maps.event.addListener(map, 'mouseover', () => { // has advantage over div MouseLeave

this_.mouseInMap_ = true;

});

// an alternative way to know the mouse is back within the map

// This would not fire when clicking/interacting with google maps

// own on-map countrols+markers. This handles an edge case for touch devices

// + 'draggable:false' custom option. See #332 for more details.

maps.event.addListener(map, 'click', () => {

this_.mouseInMap_ = true;

});

maps.event.addListener(map, 'mouseout', () => { // has advantage over div MouseLeave

this_.mouseInMap_ = false;

this_.mouse_ = null;

this_.markersDispatcher_.emit('kON_MOUSE_POSITION_CHANGE');

});

maps.event.addListener(map, 'drag', () => {

this_.dragTime_ = (new Date()).getTime();

this_._onDrag();

});

// user choosing satellite vs roads, etc

maps.event.addListener(map, 'maptypeid_changed', () => {

this_._onMapTypeIdChange(map.getMapTypeId());

});

})

.catch(e => {

console.error(e); // eslint-disable-line no-console

throw e;

});

}

_onGoogleApiLoaded = (...args) => {

if (this.props.onGoogleApiLoaded) {

if (process.env.NODE_ENV !== 'production' &&

this.props.yesIWantToUseGoogleMapApiInternals !== true) {

console.warn( 'GoogleMap: ' + // eslint-disable-line

'Usage of internal api objects is dangerous ' +

'and can cause a lot of issues.\n' +

'To hide this warning add yesIWantToUseGoogleMapApiInternals={true} ' +

'to <GoogleMap instance');

}

this.props.onGoogleApiLoaded(...args);

}

_getHoverDistance = () => this.props.hoverDistance;

_onDrag = (...args) => this.props.onDrag &&

this.props.onDrag(...args);

_onMapTypeIdChange = (...args) => this.props.onMapTypeIdChange &&

this.props.onMapTypeIdChange(...args);

_onZoomAnimationStart = (...args) => this.props.onZoomAnimationStart &&

this.props.onZoomAnimationStart(...args)

_onZoomAnimationEnd = (...args) => this.props.onZoomAnimationEnd &&

this.props.onZoomAnimationEnd(...args)

_onChildClick = (...args) => {

if (this.props.onChildClick) {

return this.props.onChildClick(...args);

}

return undefined;

}

_onChildMouseDown = (hoverKey, childProps) => {

this.childMouseDownArgs_ = [hoverKey, childProps];

if (this.props.onChildMouseDown) {

this.props.onChildMouseDown(hoverKey, childProps, { ...this.mouse_ });

}

// this method works only if this.props.onChildMouseDown was called

_onChildMouseUp = () => {

if (this.childMouseDownArgs_) {

if (this.props.onChildMouseUp) {

this.props.onChildMouseUp(...this.childMouseDownArgs_, { ...this.mouse_ });

}

this.childMouseDownArgs_ = null;

this.childMouseUpTime_ = (new Date()).getTime();

}

// this method works only if this.props.onChildMouseDown was called

_onChildMouseMove = () => {

if (this.childMouseDownArgs_) {

if (this.props.onChildMouseMove) {

this.props.onChildMouseMove(...this.childMouseDownArgs_, { ...this.mouse_ });

}

_onChildMouseEnter = (...args) => {

if (this.props.onChildMouseEnter) {

return this.props.onChildMouseEnter(...args);

}

return undefined;

}

_onChildMouseLeave = (...args) => {

if (this.props.onChildMouseLeave) {

return this.props.onChildMouseLeave(...args);

}

return undefined;

}

_setViewSize = () => {

if (!this.mounted_) return;

const mapDom = ReactDOM.findDOMNode(this.refs.google_map_dom);

this.geoService_.setViewSize(mapDom.clientWidth, mapDom.clientHeight);

this._onBoundsChanged();

}

_onWindowResize = () => {

this.resetSizeOnIdle_ = true;

}

_onMapMouseMove = (e) => {

if (!this.mouseInMap_) return;

const currTime = (new Date()).getTime();

const K_RECALC_CLIENT_RECT_MS = 50;

if (currTime - this.mouseMoveTime_ > K_RECALC_CLIENT_RECT_MS) {

this.boundingRect_ = e.currentTarget.getBoundingClientRect();

}

this.mouseMoveTime_ = currTime;

const mousePosX = e.clientX - this.boundingRect_.left;

const mousePosY = e.clientY - this.boundingRect_.top;

if (!this.mouse_) {

this.mouse_ = { x: 0, y: 0, lat: 0, lng: 0 };

}

this.mouse_.x = mousePosX;

this.mouse_.y = mousePosY;

const latLng = this.geoService_.unproject(this.mouse_, true);

this.mouse_.lat = latLng.lat;

this.mouse_.lng = latLng.lng;

this._onChildMouseMove();

if (currTime - this.dragTime_ < K_IDLE_TIMEOUT) {

this.fireMouseEventOnIdle_ = true;

} else {

this.markersDispatcher_.emit('kON_MOUSE_POSITION_CHANGE');

this.fireMouseEventOnIdle_ = false;

}

// K_IDLE_CLICK_TIMEOUT - looks like 300 is enough

_onClick = (...args) =>

this.props.onClick &&

!this.childMouseDownArgs_ &&

((new Date()).getTime() - this.childMouseUpTime_) > K_IDLE_CLICK_TIMEOUT &&

this.dragTime_ === 0 &&

this.props.onClick(...args)

_onMapClick = (event) => {

if (this.markersDispatcher_) {

// support touch events and recalculate mouse position on click

this._onMapMouseMove(event);

const currTime = (new Date()).getTime();

if (currTime - this.dragTime_ > K_IDLE_TIMEOUT) {

if (this.mouse_) {

this._onClick({

...this.mouse_,

event,

});

}

this.markersDispatcher_.emit('kON_CLICK', event);

}

// gmap can't prevent map drag if mousedown event already occured

// the only workaround I find is prevent mousedown native browser event

_onMapMouseDownNative = (event) => {

if (!this.mouseInMap_) return;

this._onMapMouseDown(event);

}

_onMapMouseDown = (event) => {

if (this.markersDispatcher_) {

const currTime = (new Date()).getTime();

if (currTime - this.dragTime_ > K_IDLE_TIMEOUT) {

// Hovered marker detected at mouse move could be deleted at mouse down time

// so it will be good to force hovered marker recalculation

this._onMapMouseMove(event);

this.markersDispatcher_.emit('kON_MDOWN', event);

}

_onMapMouseDownCapture = () => {

if (detectBrowser().isChrome) {

// to fix strange zoom in chrome

if (!this.mouse_) {

this.zoomControlClickTime_ = (new Date()).getTime();

}

_onKeyDownCapture = () => {

if (detectBrowser().isChrome) {

this.zoomControlClickTime_ = (new Date()).getTime();

}

_isCenterDefined = (center) => center && (

(isPlainObject(center) && isNumber(center.lat) && isNumber(center.lng)) ||

(center.length === 2 && isNumber(center[0]) && isNumber(center[1]))

)

_onBoundsChanged = (map, maps, callExtBoundsChange) => {

if (map) {

const gmC = map.getCenter();

this.geoService_.setView([gmC.lat(), gmC.lng()], map.getZoom(), 0);

}

if ((this.props.onChange || this.props.onBoundsChange) && this.geoService_.canProject()) {

const zoom = this.geoService_.getZoom();

const bounds = this.geoService_.getBounds();

const centerLatLng = this.geoService_.getCenter();

if (!isArraysEqualEps(bounds, this.prevBounds_, kEPS)) {

if (callExtBoundsChange !== false) {

const marginBounds = this.geoService_.getBounds(this.props.margin);

if (this.props.onBoundsChange) {

this.props.onBoundsChange(

this.centerIsObject_

? { ...centerLatLng }

: [centerLatLng.lat, centerLatLng.lng],

zoom,

bounds,

marginBounds

);

}

if (this.props.onChange) {

this.props.onChange({

center: { ...centerLatLng },

zoom,

bounds: {

nw: {

lat: bounds[0],

lng: bounds[1],

se: {

lat: bounds[2],

lng: bounds[3],

sw: {

lat: bounds[4],

lng: bounds[5],

ne: {

lat: bounds[6],

lng: bounds[7],

marginBounds: {

nw: {

lat: marginBounds[0],

lng: marginBounds[1],

se: {

lat: marginBounds[2],

lng: marginBounds[3],

sw: {

lat: marginBounds[4],

lng: marginBounds[5],

ne: {

lat: marginBounds[6],

lng: marginBounds[7],

size: this.geoService_.hasSize()

? {

width: this.geoService_.getWidth(),

height: this.geoService_.getHeight(),

}

: {

width: 0,

height: 0,

});

}

this.prevBounds_ = bounds;

}

render() {

const mapMarkerPrerender = !this.state.overlayCreated

? (

<GoogleMapMarkersPrerender

experimental={this.props.experimental}

onChildClick={this._onChildClick}

onChildMouseDown={this._onChildMouseDown}

onChildMouseEnter={this._onChildMouseEnter}

onChildMouseLeave={this._onChildMouseLeave}

geoService={this.geoService_}

projectFromLeftTop={false}

distanceToMouse={this.props.distanceToMouse}

getHoverDistance={this._getHoverDistance}

dispatcher={this.markersDispatcher_}

)

: null;

return (

<div

style={this.props.style}

onMouseMove={this._onMapMouseMove}

onMouseDownCapture={this._onMapMouseDownCapture}

onClick={this._onMapClick}

{/* render markers before map load done */}

{mapMarkerPrerender}

</div>

);

}

google-map-react/src/google_map.js at master · derdrdirk/google-map-react · GitHub

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