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mapml-viewer.js
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import {
map,
LatLng,
control,
bounds,
latLngBounds,
LayerGroup
} from 'leaflet';
import Proj from 'proj4leaflet/src/proj4leaflet.js';
import { Util } from './mapml/utils/Util.js';
import { DOMTokenList } from './mapml/utils/DOMTokenList.js';
import { matchMedia } from './mapml/elementSupport/viewers/matchMedia.js';
import { HTMLLayerElement } from './map-layer.js';
import { LayerDashElement } from './layer-.js';
import { HTMLMapCaptionElement } from './map-caption.js';
import { HTMLFeatureElement } from './map-feature.js';
import { HTMLExtentElement } from './map-extent.js';
import { HTMLInputElement } from './map-input.js';
import { HTMLSelectElement } from './map-select.js';
import { HTMLLinkElement } from './map-link.js';
import { HTMLStyleElement } from './map-style.js';
import { HTMLWebMapElement } from './web-map.js';
import { HTMLMapAreaElement } from './map-area.js';
import { layerControl } from './mapml/control/LayerControl.js';
import { AttributionButton } from './mapml/control/AttributionButton.js';
import { reloadButton } from './mapml/control/ReloadButton.js';
import { scaleBar } from './mapml/control/ScaleBar.js';
import { fullscreenButton } from './mapml/control/FullscreenButton.js';
import { geolocationButton } from './mapml/control/GeolocationButton.js';
import { debugOverlay } from './mapml/layers/DebugOverlay.js';
import { crosshair } from './mapml/layers/Crosshair.js';
import { featureIndexOverlay } from './mapml/layers/FeatureIndexOverlay.js';
export class HTMLMapmlViewerElement extends HTMLElement {
static get observedAttributes() {
return [
'lat',
'lon',
'zoom',
'projection',
'width',
'height',
'controls',
'static',
'controlslist'
];
}
// see comments below regarding attributeChangedCallback vs. getter/setter
// usage. Effectively, the user of the element must use the property, not
// the getAttribute/setAttribute/removeAttribute DOM API, because the latter
// calls don't result in the getter/setter being called (so you have to use
// the getter/setter directly)
get controls() {
return this.hasAttribute('controls');
}
set controls(value) {
const hasControls = Boolean(value);
if (hasControls) {
this.setAttribute('controls', '');
} else {
this.removeAttribute('controls');
}
}
get controlsList() {
return this._controlsList;
}
set controlsList(value) {
this._controlsList.value = value;
this.setAttribute('controlslist', value);
}
get width() {
return +window.getComputedStyle(this).width.replace('px', '');
}
set width(val) {
//img.height or img.width setters change or add the corresponding attributes
this.setAttribute('width', val);
}
get height() {
return +window.getComputedStyle(this).height.replace('px', '');
}
set height(val) {
//img.height or img.width setters change or add the corresponding attributes
this.setAttribute('height', val);
}
get lat() {
return +(this.hasAttribute('lat') ? this.getAttribute('lat') : 0);
}
set lat(val) {
if (val) {
this.setAttribute('lat', val);
}
}
get lon() {
return +(this.hasAttribute('lon') ? this.getAttribute('lon') : 0);
}
set lon(val) {
if (val) {
this.setAttribute('lon', val);
}
}
get projection() {
return this.hasAttribute('projection')
? this.getAttribute('projection')
: 'OSMTILE';
}
set projection(val) {
if (val) {
this.whenProjectionDefined(val)
.then(() => {
this.setAttribute('projection', val);
})
.catch(() => {
throw new Error('Undefined projection: ' + val);
});
}
}
get zoom() {
return +(this.hasAttribute('zoom') ? this.getAttribute('zoom') : 0);
}
set zoom(val) {
var parsedVal = parseInt(val, 10);
if (!isNaN(parsedVal) && parsedVal >= 0 && parsedVal <= 25) {
this.setAttribute('zoom', parsedVal);
}
}
get layers() {
return this.getElementsByTagName('map-layer');
}
get extent() {
let map = this._map,
pcrsBounds = Util.pixelToPCRSBounds(
map.getPixelBounds(),
map.getZoom(),
map.options.projection
);
let formattedExtent = Util._convertAndFormatPCRS(
pcrsBounds,
map.options.crs,
this.projection
);
// get min/max zoom from layers at this moment
let minZoom = Infinity,
maxZoom = -Infinity;
for (let i = 0; i < this.layers.length; i++) {
if (this.layers[i].extent) {
if (this.layers[i].extent.zoom.minZoom < minZoom)
minZoom = this.layers[i].extent.zoom.minZoom;
if (this.layers[i].extent.zoom.maxZoom > maxZoom)
maxZoom = this.layers[i].extent.zoom.maxZoom;
}
}
formattedExtent.zoom = {
minZoom: minZoom !== Infinity ? minZoom : map.getMinZoom(),
maxZoom: maxZoom !== -Infinity ? maxZoom : map.getMaxZoom()
};
return formattedExtent;
}
get static() {
return this.hasAttribute('static');
}
set static(value) {
const isStatic = Boolean(value);
if (isStatic) this.setAttribute('static', '');
else this.removeAttribute('static');
}
constructor() {
// Always call super first in constructor
super();
this._source = this.outerHTML;
// create an array to track the history of the map and the current index
this._history = [];
this._historyIndex = -1;
this._traversalCall = false;
}
connectedCallback() {
this.whenProjectionDefined(this.projection)
.then(() => {
this._setLocale();
this._initShadowRoot();
this._controlsList = new DOMTokenList(
this.getAttribute('controlslist'),
this,
'controlslist',
[
'noreload',
'nofullscreen',
'nozoom',
'nolayer',
'noscale',
'geolocation'
]
);
var s = window.getComputedStyle(this),
wpx = s.width,
hpx = s.height,
w = this.hasAttribute('width')
? this.getAttribute('width')
: parseInt(wpx.replace('px', '')),
h = this.hasAttribute('height')
? this.getAttribute('height')
: parseInt(hpx.replace('px', ''));
this._changeWidth(w);
this._changeHeight(h);
this._createMap();
// https://github.com/Maps4HTML/MapML.js/issues/274
this.setAttribute('role', 'application');
this._toggleStatic();
/*
1. only deletes aria-label when the last (only remaining) map caption is removed
2. only deletes aria-label if the aria-label was defined by the map caption element itself
*/
let mapcaption = this.querySelector('map-caption');
if (mapcaption !== null) {
setTimeout(() => {
let ariaupdate = this.getAttribute('aria-label');
if (ariaupdate === mapcaption.innerHTML) {
this.mapCaptionObserver = new MutationObserver((m) => {
let mapcaptionupdate = this.querySelector('map-caption');
if (mapcaptionupdate !== mapcaption) {
this.removeAttribute('aria-label');
}
});
this.mapCaptionObserver.observe(this, {
childList: true
});
}
}, 0);
}
})
.catch((e) => {
console.log(e);
throw new Error('Error: ' + e);
});
}
_setLocale() {
if (this.closest(':lang(fr)') === this) {
this.locale = M.options.localeFr;
} else if (this.closest(':lang(en)') === this) {
this.locale = M.options.localeEn;
} else {
// "browser" locale
this.locale = M.options.locale;
}
}
_initShadowRoot() {
if (!this.shadowRoot) {
this.attachShadow({ mode: 'open' });
}
let tmpl = document.createElement('template');
/* jshint ignore:start */
tmpl.innerHTML = `<link rel="stylesheet" href="${
new URL('mapml.css', import.meta.url).href
}">`;
/* jshint ignore:end */
let shadowRoot = this.shadowRoot;
this._container = document.createElement('div');
let output =
"<output role='status' aria-live='polite' aria-atomic='true' class='mapml-screen-reader-output'></output>";
this._container.insertAdjacentHTML('beforeend', output);
// Set default styles for the map element.
let mapDefaultCSS = document.createElement('style');
mapDefaultCSS.innerHTML =
`:host {` +
`all: initial;` + // Reset properties inheritable from html/body, as some inherited styles may cause unexpected issues with the map element's components (https://github.com/Maps4HTML/MapML.js/issues/140).
`contain: layout size;` + // Contain layout and size calculations within the map element.
`display: inline-block;` + // This together with dimension properties is required so that Leaflet isn't working with a height=0 box by default.
`height: 150px;` + // Provide a "default object size" (https://github.com/Maps4HTML/HTML-Map-Element/issues/31).
`width: 300px;` +
`border-width: 2px;` + // Set a default border for contrast, similar to UA default for iframes.
`border-style: inset;` +
`}` +
`:host([frameborder="0"]) {` +
`border-width: 0;` +
`}` +
`:host([hidden]) {` +
`display: none!important;` +
`}` +
`:host .leaflet-control-container {` +
`visibility: hidden!important;` + // Visibility hack to improve percieved performance (mitigate FOUC) – visibility is unset in mapml.css! (https://github.com/Maps4HTML/MapML.js/issues/154).
`}`;
// Hide all (light DOM) children of the map element.
let hideElementsCSS = document.createElement('style');
hideElementsCSS.innerHTML =
`mapml-viewer > * {` + `display: none!important;` + `}`;
this.appendChild(hideElementsCSS);
// Make the Leaflet container element programmatically identifiable
// (https://github.com/Leaflet/Leaflet/issues/7193).
this._container.setAttribute('role', 'region');
this._container.setAttribute('aria-label', 'Interactive map');
shadowRoot.appendChild(mapDefaultCSS);
shadowRoot.appendChild(tmpl.content.cloneNode(true));
shadowRoot.appendChild(this._container);
}
_createMap() {
if (!this._map) {
this._map = map(this._container, {
center: new LatLng(this.lat, this.lon),
minZoom: 0,
maxZoom: M[this.projection].options.resolutions.length - 1,
projection: this.projection,
query: true,
contextMenu: true,
announceMovement: M.options.announceMovement,
featureIndex: true,
mapEl: this,
crs: M[this.projection],
zoom: this.zoom,
zoomControl: false
});
this._addToHistory();
this._createControls();
this._toggleControls();
this._crosshair = crosshair().addTo(this._map);
if (M.options.featureIndexOverlayOption)
this._featureIndexOverlay = featureIndexOverlay().addTo(this._map);
this._setUpEvents();
}
}
disconnectedCallback() {
this._removeEvents();
while (this.shadowRoot.firstChild) {
this.shadowRoot.removeChild(this.shadowRoot.firstChild);
}
delete this._map;
this._deleteControls();
}
adoptedCallback() {
// console.log('Custom map element moved to new page.');
}
attributeChangedCallback(name, oldValue, newValue) {
// console.log('Attribute: ' + name + ' changed from: '+ oldValue + ' to: '+newValue);
// "Best practice": handle side-effects in this callback
// https://developers.google.com/web/fundamentals/web-components/best-practices
// https://developers.google.com/web/fundamentals/web-components/best-practices#avoid-reentrancy
// note that the example is misleading, since the user can't use
// setAttribute or removeAttribute to set the property, they need to use
// the property directly in their API usage, which kinda sucks
/*
const hasValue = newValue !== null;
switch (name) {
case 'checked':
// Note the attributeChangedCallback is only handling the *side effects*
// of setting the attribute.
this.setAttribute('aria-checked', hasValue);
break;
...
} */
switch (name) {
case 'controlslist':
if (this._controlsList) {
if (this._controlsList.valueSet === false) {
this._controlsList.value = newValue;
}
this._toggleControls();
}
break;
case 'controls':
if (oldValue !== null && newValue === null) {
this._hideControls();
} else if (oldValue === null && newValue !== null) {
this._showControls();
}
break;
case 'height':
if (oldValue !== newValue) {
this._changeHeight(newValue);
}
break;
case 'width':
if (oldValue !== newValue) {
this._changeWidth(newValue);
}
break;
case 'static':
this._toggleStatic();
break;
case 'projection':
const reconnectLayers = () => {
// save map location and zoom
let lat = this.lat;
let lon = this.lon;
let zoom = this.zoom;
// saving the lat, lon and zoom is necessary because Leaflet seems
// to try to compensate for the change in the scales for each zoom
// level in the crs by changing the zoom level of the map when
// you set the map crs. So, we save the current view for use below
// when all the layers' reconnections have settled.
// leaflet doesn't like this: https://github.com/Leaflet/Leaflet/issues/2553
this._map.options.crs = M[newValue];
this._map.options.projection = newValue;
let layersReady = [];
this._map.announceMovement.disable();
for (let layer of this.querySelectorAll('map-layer,layer-')) {
layer.removeAttribute('disabled');
let reAttach = this.removeChild(layer);
this.appendChild(reAttach);
layersReady.push(reAttach.whenReady());
}
return Promise.allSettled(layersReady).then(() => {
// use the saved map location to ensure it is correct after
// changing the map CRS. Specifically affects projection
// upgrades, e.g. https://maps4html.org/experiments/custom-projections/BNG/
// see leaflet bug: https://github.com/Leaflet/Leaflet/issues/2553
this.zoomTo(lat, lon, zoom);
if (M.options.announceMovement) this._map.announceMovement.enable();
// required to delay until map-extent.disabled is correctly set
// which happens as a result of map-layer._validateDisabled()
// which happens so much we have to delay until they calls are
// completed
setTimeout(() => {
this.dispatchEvent(new CustomEvent('map-projectionchange'));
}, 0);
});
};
if (
newValue &&
this._map &&
this._map.options.projection !== newValue
) {
const connect = reconnectLayers.bind(this);
this.whenProjectionDefined(newValue)
.then(() => connect())
.then(() => {
if (this._map && this._map.options.projection !== oldValue) {
// this doesn't completely work either
this._resetHistory();
}
if (this._debug) for (let i = 0; i < 2; i++) this.toggleDebug();
})
.catch(() => {
throw new Error('Undefined projection: ' + newValue);
});
}
break;
}
}
// Creates All map controls and adds them to the map, when created.
_createControls() {
let mapSize = this._map.getSize().y,
totalSize = 0;
this._layerControl = layerControl(null, {
collapsed: true,
mapEl: this
}).addTo(this._map);
this._map.on('movestart', this._layerControl.collapse, this._layerControl);
let scaleValue = M.options.announceScale;
if (scaleValue === 'metric') {
scaleValue = { metric: true, imperial: false };
}
if (scaleValue === 'imperial') {
scaleValue = { metric: false, imperial: true };
}
if (!this._scaleBar) this._scaleBar = scaleBar(scaleValue).addTo(this._map);
// Only add controls if there is enough top left vertical space
if (!this._zoomControl && totalSize + 93 <= mapSize) {
totalSize += 93;
this._zoomControl = control
.zoom({
zoomInTitle: this.locale.btnZoomIn,
zoomOutTitle: this.locale.btnZoomOut
})
.addTo(this._map);
}
if (!this._reloadButton && totalSize + 49 <= mapSize) {
totalSize += 49;
this._reloadButton = reloadButton().addTo(this._map);
}
if (!this._fullScreenControl && totalSize + 49 <= mapSize) {
totalSize += 49;
this._fullScreenControl = fullscreenButton().addTo(this._map);
}
if (!this._geolocationButton) {
this._geolocationButton = geolocationButton().addTo(this._map);
}
}
// Sets controls by hiding/unhiding them based on the map attribute
_toggleControls() {
if (this.controls === false) {
this._hideControls();
this._map.contextMenu.toggleContextMenuItem('Controls', 'disabled');
} else {
this._showControls();
this._map.contextMenu.toggleContextMenuItem('Controls', 'enabled');
}
}
_hideControls() {
this._setControlsVisibility('fullscreen', true);
this._setControlsVisibility('layercontrol', true);
this._setControlsVisibility('reload', true);
this._setControlsVisibility('zoom', true);
this._setControlsVisibility('geolocation', true);
this._setControlsVisibility('scale', true);
}
_showControls() {
this._setControlsVisibility('fullscreen', false);
this._setControlsVisibility('layercontrol', false);
this._setControlsVisibility('reload', false);
this._setControlsVisibility('zoom', false);
this._setControlsVisibility('geolocation', true);
this._setControlsVisibility('scale', false);
// prune the controls shown if necessary
// this logic could be embedded in _showControls
// but would require being able to iterate the domain of supported tokens
// for the controlslist
if (this._controlsList) {
this._controlsList.forEach((value) => {
switch (value.toLowerCase()) {
case 'nofullscreen':
this._setControlsVisibility('fullscreen', true);
break;
case 'nolayer':
this._setControlsVisibility('layercontrol', true);
break;
case 'noreload':
this._setControlsVisibility('reload', true);
break;
case 'nozoom':
this._setControlsVisibility('zoom', true);
break;
case 'geolocation':
this._setControlsVisibility('geolocation', false);
break;
case 'noscale':
this._setControlsVisibility('scale', true);
break;
}
});
}
if (this._layerControl && this._layerControl._layers.length === 0) {
this._layerControl._container.setAttribute('hidden', '');
}
}
// delete the map controls that are private properties of this custom element
_deleteControls() {
delete this._layerControl;
delete this._zoomControl;
delete this._reloadButton;
delete this._fullScreenControl;
delete this._geolocationButton;
delete this._scaleBar;
}
// Sets the control's visibility AND all its childrens visibility,
// for the control element based on the Boolean hide parameter
_setControlsVisibility(control, hide) {
let container;
switch (control) {
case 'zoom':
if (this._zoomControl) {
container = this._zoomControl._container;
}
break;
case 'reload':
if (this._reloadButton) {
container = this._reloadButton._container;
}
break;
case 'fullscreen':
if (this._fullScreenControl) {
container = this._fullScreenControl._container;
}
break;
case 'layercontrol':
if (this._layerControl) {
container = this._layerControl._container;
}
break;
case 'geolocation':
if (this._geolocationButton) {
container = this._geolocationButton._container;
}
break;
case 'scale':
if (this._scaleBar) {
container = this._scaleBar._container;
}
break;
}
if (container) {
if (hide) {
// setting the visibility for all the children of the element
[...container.children].forEach((childEl) => {
childEl.setAttribute('hidden', '');
});
container.setAttribute('hidden', '');
} else {
// setting the visibility for all the children of the element
[...container.children].forEach((childEl) => {
childEl.removeAttribute('hidden');
});
container.removeAttribute('hidden');
}
}
}
_toggleStatic() {
const isStatic = this.hasAttribute('static');
if (this._map) {
if (isStatic) {
this._map.dragging.disable();
this._map.touchZoom.disable();
this._map.doubleClickZoom.disable();
this._map.scrollWheelZoom.disable();
this._map.boxZoom.disable();
this._map.keyboard.disable();
this._zoomControl.disable();
} else {
this._map.dragging.enable();
this._map.touchZoom.enable();
this._map.doubleClickZoom.enable();
this._map.scrollWheelZoom.enable();
this._map.boxZoom.enable();
this._map.keyboard.enable();
this._zoomControl.enable();
}
}
}
_dropHandler(event) {
event.preventDefault();
let text = event.dataTransfer.getData('text');
Util._pasteLayer(this, text);
}
_dragoverHandler(event) {
event.preventDefault();
event.dataTransfer.dropEffect = 'copy';
}
_removeEvents() {
if (this._map) {
this._map.off();
this.removeEventListener('drop', this._dropHandler, false);
this.removeEventListener('dragover', this._dragoverHandler, false);
}
}
_setUpEvents() {
this.addEventListener('drop', this._dropHandler, false);
this.addEventListener('dragover', this._dragoverHandler, false);
this.addEventListener(
'change',
function (e) {
if (e.target.tagName === 'MAP-LAYER' || e.target.tagName === 'LAYER-') {
this.dispatchEvent(
new CustomEvent('layerchange', {
details: { target: this, originalEvent: e }
})
);
}
},
false
);
let host =
this.getRootNode() instanceof ShadowRoot
? this.getRootNode().host
: this.parentElement;
host.addEventListener('keyup', function (e) {
if (
e.keyCode === 9 &&
document.activeElement.nodeName === 'MAPML-VIEWER'
) {
document.activeElement.dispatchEvent(
new CustomEvent('mapfocused', { detail: { target: this } })
);
}
});
// pasting map-layer, links and geojson using Ctrl+V
this.addEventListener('keydown', function (e) {
if (e.keyCode === 86 && e.ctrlKey) {
navigator.clipboard.readText().then((layer) => {
Util._pasteLayer(this, layer);
});
// Prevents default spacebar event on all of mapml-viewer
} else if (
e.keyCode === 32 &&
this.shadowRoot.activeElement.nodeName !== 'INPUT'
) {
e.preventDefault();
this._map.fire('keypress', { originalEvent: e });
}
});
host.addEventListener('mousedown', function (e) {
if (document.activeElement.nodeName === 'MAPML-VIEWER') {
document.activeElement.dispatchEvent(
new CustomEvent('mapfocused', { detail: { target: this } })
);
}
});
this._map.on(
'locationfound',
function (e) {
this.dispatchEvent(
new CustomEvent('maplocationfound', {
detail: { latlng: e.latlng, accuracy: e.accuracy }
})
);
},
this
);
this._map.on(
'locationerror',
function (e) {
this.dispatchEvent(
new CustomEvent('locationerror', { detail: { error: e.message } })
);
},
this
);
this._map.on(
'load',
function () {
this.dispatchEvent(
new CustomEvent('load', { detail: { target: this } })
);
},
this
);
this._map.on(
'preclick',
function (e) {
this.dispatchEvent(
new CustomEvent('preclick', {
detail: {
lat: e.latlng.lat,
lon: e.latlng.lng,
x: e.containerPoint.x,
y: e.containerPoint.y
}
})
);
},
this
);
this._map.on(
'click',
function (e) {
this.dispatchEvent(
new CustomEvent('click', {
detail: {
lat: e.latlng.lat,
lon: e.latlng.lng,
x: e.containerPoint.x,
y: e.containerPoint.y
}
})
);
},
this
);
this._map.on(
'dblclick',
function (e) {
this.dispatchEvent(
new CustomEvent('dblclick', {
detail: {
lat: e.latlng.lat,
lon: e.latlng.lng,
x: e.containerPoint.x,
y: e.containerPoint.y
}
})
);
},
this
);
this._map.on(
'mousemove',
function (e) {
this.dispatchEvent(
new CustomEvent('mousemove', {
detail: {
lat: e.latlng.lat,
lon: e.latlng.lng,
x: e.containerPoint.x,
y: e.containerPoint.y
}
})
);
},
this
);
this._map.on(
'mouseover',
function (e) {
this.dispatchEvent(
new CustomEvent('mouseover', {
detail: {
lat: e.latlng.lat,
lon: e.latlng.lng,
x: e.containerPoint.x,
y: e.containerPoint.y
}
})
);
},
this
);
this._map.on(
'mouseout',
function (e) {
this.dispatchEvent(
new CustomEvent('mouseout', {
detail: {
lat: e.latlng.lat,
lon: e.latlng.lng,
x: e.containerPoint.x,
y: e.containerPoint.y
}
})
);
},
this
);
this._map.on(
'mousedown',
function (e) {
this.dispatchEvent(
new CustomEvent('mousedown', {
detail: {
lat: e.latlng.lat,
lon: e.latlng.lng,
x: e.containerPoint.x,
y: e.containerPoint.y
}
})
);
},
this
);
this._map.on(
'mouseup',
function (e) {
this.dispatchEvent(
new CustomEvent('mouseup', {
detail: {
lat: e.latlng.lat,
lon: e.latlng.lng,
x: e.containerPoint.x,
y: e.containerPoint.y
}
})
);
},
this
);
this._map.on(
'contextmenu',
function (e) {
this.dispatchEvent(
new CustomEvent('contextmenu', {
detail: {
lat: e.latlng.lat,
lon: e.latlng.lng,
x: e.containerPoint.x,
y: e.containerPoint.y
}
})
);
},
this
);
this._map.on(
'movestart',
function () {
this.dispatchEvent(
new CustomEvent('movestart', { detail: { target: this } })
);
},
this
);
this._map.on(
'move',
function () {
this.dispatchEvent(
new CustomEvent('move', { detail: { target: this } })
);
},
this
);
this._map.on(
'moveend',
function () {
this._updateMapCenter();
this._addToHistory();
this.dispatchEvent(
new CustomEvent('map-moveend', { detail: { target: this } })
);
},
this
);
this._map.on(
'zoomstart',
function () {
this.dispatchEvent(
new CustomEvent('zoomstart', { detail: { target: this } })
);
},
this
);
this._map.on(
'zoom',
function () {
this.dispatchEvent(
new CustomEvent('zoom', { detail: { target: this } })
);
},
this
);
this._map.on(
'zoomend',
function () {
this._updateMapCenter();
this.dispatchEvent(
new CustomEvent('zoomend', { detail: { target: this } })
);
},
this
);
const setMapMinAndMaxZoom = ((e) => {
this.whenLayersReady().then(() => {
if (e && e.layer._layerEl) {
this._map.setMaxZoom(this.extent.zoom.maxZoom);
this._map.setMinZoom(this.extent.zoom.minZoom);
}
});
}).bind(this);
this.whenLayersReady().then(() => {
this._map.setMaxZoom(this.extent.zoom.maxZoom);
this._map.setMinZoom(this.extent.zoom.minZoom);
this._map.on('layeradd layerremove', setMapMinAndMaxZoom, this);
});
this.addEventListener('fullscreenchange', function (event) {
if (document.fullscreenElement === null) {
// full-screen mode has been exited
this._map.contextMenu.setViewFullScreenInnerHTML('view');
} else {
this._map.contextMenu.setViewFullScreenInnerHTML('exit');
}
});
this.addEventListener('keydown', function (event) {
if (document.activeElement.nodeName === 'MAPML-VIEWER') {
// Check if Ctrl+R is pressed and map is focused
if (event.ctrlKey && event.keyCode === 82) {
// Prevent default browser behavior
event.preventDefault();
this.reload();
} else if (event.altKey && event.keyCode === 39) {
// Prevent default browser behavior
event.preventDefault();
this.forward();
} else if (event.altKey && event.keyCode === 37) {
// Prevent default browser behavior
event.preventDefault();
this.back();
}
}
});
}
locate(options) {
//options: https://leafletjs.com/reference.html#locate-options
if (this._geolocationButton) {
this._geolocationButton.stop();
}
if (options) {
if (options.zoomTo) {
options.setView = options.zoomTo;
delete options.zoomTo;
}
this._map.locate(options);