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px-map-behavior-root.es6.js
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px-map-behavior-root.es6.js
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/**
* @license
* Copyright (c) 2018, General Electric
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
(function() {
'use strict';
/****************************************************************************
* BEHAVIORS
****************************************************************************/
/* Ensures the behavior namespace is created */
window.PxMapBehavior = (window.PxMapBehavior || {});
/**
*
* @polymerBehavior PxMapBehavior.TrackMarkers
*/
PxMapBehavior.TrackMarkersImpl = {
properties: {
/**
* Updates the visible bounds of the map to fit all markers as they are
* added. Markers are continuously monitored for changes, and any new
* markers added late in the map's lifecycle (e.g. markers created
* dynamically long after the map is loaded) will trigger an additional
* resize of the map if they are not within its current visible bounds.
*
* This attribute is dynamic. To stop map resizes after some amount of time,
* disable this attribute.
*
*
* @type {Object}
*/
fitToMarkers: {
type: Boolean,
value: false,
observer: '_fitMapToMarkersIfSet'
},
/**
* Optional setting that only works if `fitToMarkers` is enabled. Adds a
* padding between the edges of the map and the visible markers shown.
* Set to a percentage value (e.g. `0.25` for 25%). Defaults to 15%, setting
* to a lower value will lead to some large markers potentially not fitting
* on the map.
*
* @type {Number}
*/
fitToMarkersPadding: {
type: Number,
value: 0.15
},
/**
* Optional setting that only works if `fitToMarkers` is enabled. Determines
* how the map will calculate its zoom level when fitting markers.
* Choose from the following options (default is 'max'):
*
* * 'max' - the map will zoom out to `minZoom` level regardless of
* currently rendered markers
* * 'min' - the map will attempt to zoom in to the lowest level (within
* the `maxZoom` setting) that fits all markers, provided the markers
* are rendered close together.
* * 'auto' - the map will zoom in our out to the whatever level it
* needs to fit all rendered markers (within the map's `minZoom` or
* `maxZoom`)
*
* @type {String}
*/
fitToMarkersZoom: {
type: String,
value: 'max'
}
},
addInst(parent) {
this.listen(this, 'px-map-marker-added', '_handleMarkerAdded');
this.listen(this, 'px-map-marker-group-features-changed', '_handleMarkerGroupUpdated');
this._knownMarkers = (this._knownMarkers || new Map());
PxMapBehavior.DrawToolbarImpl.addInst.call(this);
},
removeInst(parent) {
this.unlisten(this, 'px-map-marker-added', '_handleMarkerAdded');
this.unlisten(this, 'px-map-marker-group-features-changed', '_handleMarkerGroupUpdated');
if (this._knownMarkers && this._knownMarkers instanceof Map) {
this._knownMarkers.clear();
}
this._knownMarkers = null;
PxMapBehavior.LeafletRootImpl.removeInst.call(this);
},
/**
* When an individual marker is added, record its location in the known markers
* map and ask the map to fit it later.
*
* Bind listeners on remove to keep the known markers map updated.
*/
_handleMarkerAdded(evt) {
if (!this._knownMarkers) return;
const localEvt = Polymer.dom(evt);
if (localEvt.rootTarget && localEvt.rootTarget.elementInst && localEvt.event.detail.latLng) {
this._knownMarkers.set(localEvt.rootTarget.elementInst, localEvt.event.detail.latLng);
this.listen(localEvt.rootTarget, 'px-map-marker-removed', '_handleMarkerRemoved');
this._fitMapToMarkersIfSet();
}
},
/**
* When an individual marker is removed, delete it from the known markers
* map and stop. Don't ask the map to refit its bounds.
*
* Unbind listeners so the element can be cleaned up.
*/
_handleMarkerRemoved(evt) {
if (!this._knownMarkers) return;
const localEvt = Polymer.dom(evt);
const knownMarker = this._knownMarkers.has(localEvt.rootTarget.elementInst || null);
if (knownMarker) {
this.unlisten(localEvt.rootTarget, 'px-map-marker-removed', '_handleMarkerRemoved');
this._knownMarkers.delete(localEvt.rootTarget.elementInst);
}
},
/**
* When marker groups are updated, set their new bounds in the known markers
* map. We don't need to worry about whether we've seen them before.
*
* Bind listeners on remove to keep the known markers map updated.
*/
_handleMarkerGroupUpdated(evt) {
if (!this._knownMarkers) return;
const localEvt = Polymer.dom(evt);
const knownMarker = this._knownMarkers.has(localEvt.rootTarget.elementInst || null);
if (localEvt.rootTarget && localEvt.rootTarget.elementInst) {
if (!knownMarker) {
this.listen(localEvt.rootTarget, 'px-map-marker-group-removed', '_handleMarkerGroupRemoved');
}
this._knownMarkers.set(this.elementInst, localEvt.event.detail.bounds);
this._fitMapToMarkersIfSet();
}
},
/**
* When marker groups are removed, delete their bounds from the known markers
* map and stop. Don't ask the map to refit its bounds.
*
* Unbind listeners so the element can be cleaned up.
*/
_handleMarkerGroupRemoved(evt) {
if (!this._knownMarkers) return;
const localEvt = Polymer.dom(evt);
const knownMarker = this._knownMarkers.has(localEvt.rootTarget.elementInst || null);
if (knownMarker) {
this.unlisten(localEvt.rootTarget, 'px-map-marker-group-removed', '_handleMarkerGroupRemoved');
this._knownMarkers.delete(localEvt.rootTarget.elementInst);
}
},
/**
* Debounced function that iterates over the known markers map and fits the
* visible bounds of the map.
*/
_fitMapToMarkers() {
this.debounce('fit-map-to-bounds', function() {
if (!this._knownMarkers || !this._knownMarkers.size) return;
const bounds = this._markersToBoundsWithPadding(this._knownMarkers, this.fitToMarkersPadding);
if (bounds && bounds.isValid()) {
const latLng = bounds.getCenter();
const zoom = this._getZoomLevelForFit(bounds, this.fitToMarkersZoom, this.elementInst);
this.elementInst.setView(latLng, zoom);
/**
* This setTimeout is added because of a leaflet known issue when
* changing both zoom level and map center at the same time. In rare
* cases where the new center is already in view, and a zoom level is
* being passed in, the map will not center properly.
* Ref: https://github.com/Leaflet/Leaflet/issues/3249#issuecomment-75931374
*/
const mapInst = this.elementInst;
setTimeout(function() {
if (mapInst.getCenter() !== latLng) {
mapInst.panTo(latLng);
}
}, 300);
}
}, 10);
},
/**
* Takes a Map of known markers with values representing the marker's geometry
* as a `L.LatLng` or `L.LatLngBounds` instance and creates a bounds object
* that encompasses all the markers. Optionally pads the bounds by a percentage
* with the `padding` param.
*
* @param {Map} markersMap
* @param {Number} [padding]
* @return {L.LatLngBounds}
*/
_markersToBoundsWithPadding(markersMap, padding) {
if (!markersMap || !markersMap.size) return;
let bounds = L.latLngBounds();
markersMap.forEach(value => {
if (value instanceof L.LatLng || value instanceof L.LatLngBounds) {
bounds.extend(value);
}
});
if (bounds.isValid() && (typeof padding === 'number')) {
bounds = bounds.pad(padding);
}
return bounds;
},
/**
* Takes a bounds, fit setting, zoom level, and map instance, and returns a
* new zoom level for the map.
*
* Note: A setting of 'auto' can now be used for all zoom levels
*
* @param {L.LatLngBounds} bounds
* @param {String} fitSetting - see `fitToMarkersZoom` property for more details
* @param {L.Map} map
* @return {Number}
*/
_getZoomLevelForFit(bounds, fitSetting, map) {
let zoom;
if (fitSetting === 'min') {
zoom = map.getMinZoom() || 0;
} else if (fitSetting === 'max') {
zoom = map.getBoundsZoom(bounds, true) - 2;
} else {
// Temporarily set the "inside" param of getBoundsZoom to be false, as leaflet is
// reversing this setting in their code when determining the correct direction to zoom.
zoom = map.getBoundsZoom(bounds, false);
}
return zoom;
},
/**
* Called when the `fitToMarkers` attribute is updated. If it is set to true
* and a map is set, call the internal `_fitMapToMarkers` method.
*/
_fitMapToMarkersIfSet() {
if (!this.elementInst || !this.fitToMarkers) return;
this._fitMapToMarkers();
},
/**
* Sets the map's visible bounds (latitude, longitude, and zoom) to fit all
* attached markers in a single view.
*
* Enable the `fit-to-markers` attribute to automatically fit all markers as
* they are added to the map.
*
* @return {Boolean} `true` if there were markers to fit, `false` if there were no markers to fit
*/
fitMapToMarkers() {
if (!this.elementInst || !this._knownMarkers || !this._knownMarkers.size) {
return false;
}
this._fitMapToMarkers();
return true;
}
};
/**
*
* @polymerBehavior PxMapBehavior.DrawToolbarImpl
*/
PxMapBehavior.DrawToolbarImpl = {
properties: {
/**
* The position of the drawing toolbal to display.
* Available positions are: 'topleft', 'topright', 'bottomleft', 'bottomright'
*/
drawToolbarPosition: {
type: String,
value: 'topleft',
notify: true,
observer: 'shouldUpdateInst'
},
/**
* Indicate whether to show the drawing toolbar on map.
*/
showDrawToolbar: {
type: Boolean,
value: false,
notify: true,
observer: 'shouldUpdateInst'
},
/**
* The language code for the drawing controls, used for i18N.
* Currently available languages are: cz, da, de, el, en, es, fa, fr, hu, id, it, nl, no, pl, pt_br, ro, ru, sv, tr, ua, zh and zh_tw.
*/
drawToolbarLanguage: {
type: String,
value: 'en',
notify: true,
observer: 'shouldUpdateInst'
},
/**
* The controls setting for the drawing toolbar.
*
* See https://github.com/geoman-io/leaflet-geoman
*/
drawControls: {
type: Object,
value: function() {
return {
drawMarker: false,
drawCircleMarker: false,
drawRectangle: false,
drawPolyline: false,
rotateMode: false,
drawText: false,
editControls: false
};
}
},
/**
* The tooltip content of custom Finish button
*/
drawFinishTitle: {
type: String,
value: 'Finish'
},
/**
* The class name of custom Finish button
*/
drawFinishCls: {
type: String,
value: 'leaflet-pm-icon-checkmark'
}
},
addInst(parent) {
PxMapBehavior.LeafletRootImpl.addInst.call(this, parent);
// add the controls
this._addControls(this.drawToolbarPosition, this.drawControls, this.drawToolbarLanguage);
// hide the controls if showDrawToolbar = false
if (!this.showDrawToolbar) {
this.elementInst.pm.toggleControls();
}
},
removeInst() {
this._removeControls();
PxMapBehavior.LeafletRootImpl.removeInst.call(this);
},
updateInst(lastOptions, nextOptions) {
if (lastOptions.showDrawToolbar !== nextOptions.showDrawToolbar) {
this.elementInst.pm.toggleControls();
this._removeDrawnLayers();
}
if(lastOptions.drawToolbarPosition !== nextOptions.drawToolbarPosition) {
this._updateControlsPosition(nextOptions.drawToolbarPosition);
}
if(lastOptions.drawToolbarLanguage !== nextOptions.drawToolbarLanguage) {
this.elementInst.pm.setLang(nextOptions.drawToolbarLanguage);
}
PxMapBehavior.LeafletRootImpl.updateInst.call(this, lastOptions, nextOptions);
},
getInstOptions() {
const options = PxMapBehavior.LeafletRootImpl.getInstOptions.call(this);
options.drawToolbarPosition = this.drawToolbarPosition;
options.showDrawToolbar = this.showDrawToolbar;
options.drawToolbarLanguage = this.drawToolbarLanguage;
options.drawControls = this.drawControls;
return options;
},
/**
* Add the controls to drawing toolbar and bind the events
* @param {*} position
* @param {*} drawControls
* @param {*} language
*/
_addControls(position, drawControls, language) {
// ignore all other shapes/layers which are not generated/drawn by leaflet-geoman
L.PM.setOptIn(true);
// make sure the this.elementInst.pm is initialized
if (!this.elementInst.pm) {
this.elementInst.pm = new L.PM.Map(this.elementInst);
}
// adds the draw/edit buttons
const options = Object.assign({position: position}, drawControls);
this.elementInst.pm.addControls(options);
// bind events
const layerCreatedFn = this._handleShapeLayerCreated.bind(this);
const layerDrawEndFn = this._handleShapeLayerDrawEnd.bind(this);
const layerRemovedFn = this._handleShapeLayerRemoved.bind(this);
const removalModeToggledFn = this._handleRemovalModeToggled.bind(this);
this.bindEvents({
'pm:create' : layerCreatedFn,
'pm:drawend' : layerDrawEndFn,
'pm:remove' : layerRemovedFn,
'pm:globalremovalmodetoggled': removalModeToggledFn
});
// creates custom button
const drawFinishedFn = this._handleDrawFinished.bind(this);
this.finishBtn = this.elementInst.pm.Toolbar.createCustomControl({
name: 'customFinish',
block: 'custom',
title: this.drawFinishTitle,
onClick: drawFinishedFn,
toggle: false,
disabled: true,
className: this.drawFinishCls
});
// set language
this.elementInst.pm.setLang(language);
// disable controls' submenu/actions
this._disableActionsForControls();
},
/**
* Disable/remove the submenu/actions for controls
*/
_disableActionsForControls() {
this.elementInst.pm.Toolbar.changeActionsOfControl('Rectangle', []);
this.elementInst.pm.Toolbar.changeActionsOfControl('Polygon', []);
this.elementInst.pm.Toolbar.changeActionsOfControl('Circle', []);
this.elementInst.pm.Toolbar.changeActionsOfControl('Cut', []);
this.elementInst.pm.Toolbar.changeActionsOfControl('editMode', []);
this.elementInst.pm.Toolbar.changeActionsOfControl('dragMode', []);
this.elementInst.pm.Toolbar.changeActionsOfControl('removalMode', []);
},
/**
* Remove the controls and drawn layers
*/
_removeControls() {
// remove all drawn layers
this._removeDrawnLayers();
this.elementInst.pm.removeControls();
},
/**
* Remove the drawn layers
*/
_removeDrawnLayers() {
// remove all drawn layers
const layers = this.elementInst.pm.getGeomanDrawLayers();
layers.forEach(layer => layer.remove());
// remove the drawing layer
this.elementInst.pm.disableDraw();
// disable the Finish button
this._toggleFinishBtnEnalbeState(false);
this.fire('px-map-drawn-layer-changed', { hasDrawnLayers: false });
},
/**
* Whether has drawn layers
*/
_hasDrawnLayers() {
const layers = this.elementInst.pm.getGeomanDrawLayers();
return layers && layers.length > 0;
},
/**
* Enalbe/Disable the custom Finish button
* @param {*} enable
*/
_toggleFinishBtnEnalbeState(enable) {
this.elementInst.pm.Toolbar.setButtonDisabled('customFinish', !enable);
if (this.finishBtn) {
const btnContainer = this.finishBtn.getContainer();
const btnIcon = this.finishBtn.buttonsDomNode.getElementsByClassName('control-icon')[0];
if (enable) {
btnContainer.classList.add('blue-border');
btnIcon.classList.add('leaflet-pm-icon-checkmark-blue');
} else {
btnContainer.classList.remove('blue-border');
btnIcon.classList.remove('leaflet-pm-icon-checkmark-blue');
}
}
},
/**
* Enable/Disable the shape buttons
*
* @param {*} enable
*/
_toggleShapeBtnsEnableState(enable) {
this.elementInst.pm.Toolbar.setButtonDisabled('Rectangle', !enable);
this.elementInst.pm.Toolbar.setButtonDisabled('Polygon', !enable);
this.elementInst.pm.Toolbar.setButtonDisabled('Circle', !enable);
},
/**
* Update the drawing toolbar position
* @param {*} position
*/
_updateControlsPosition(position) {
this.elementInst.pm.Toolbar.setBlockPosition('draw', position);
this.elementInst.pm.Toolbar.setBlockPosition('edit', position);
this.elementInst.pm.Toolbar.setBlockPosition('custom', position);
},
/**
* Bind the events for new added layers
* @param {*} layer
*/
_bindLayerEvents(layer) {
// listen edit event of new added layer
layer.on('pm:edit', evt => {
this._toggleFinishBtnEnalbeState(true);
});
layer.on('pm:cut', evt => {
this._bindLayerEvents(evt.layer);
});
},
/**
* Handle when the layer or shape is drawn/created.
* @param {*} e
*/
_handleShapeLayerCreated(e) {
// listen edit/cut event of new added layer
this._bindLayerEvents(e.layer);
// marke the layers drawn by leaflet-geoman editable
e.layer.setStyle({ pmIgnore: false });
e.layer.options.pmIgnore = false;
L.PM.reInitLayer(e.layer);
},
/**
* Handle when the layer or shape is draw ended.
*
* @param {*} e
*/
_handleShapeLayerDrawEnd(e) {
// drawend event is triggerred as well when disable the draw for the first shape/layer
// can't use hasLayers = true directly here
const hasLayers = this._hasDrawnLayers();
this._toggleFinishBtnEnalbeState(hasLayers);
this.fire('px-map-drawn-layer-changed', { hasDrawnLayers: hasLayers });
},
/**
* Handle when the layer or shape is removed.
* @param {*} e
*/
_handleShapeLayerRemoved(e) {
const hasLayers = this._hasDrawnLayers();
this._toggleFinishBtnEnalbeState(hasLayers);
this.fire('px-map-drawn-layer-changed', { hasDrawnLayers: hasLayers });
},
/**
* Handle the event when the layer is drawn/edited/removed/cutted etc.
* Return the feature colletion of drawn polygons
*
* @param {*} evt
*/
_handleDrawFinished(evt) {
const group = L.featureGroup();
const layers = this.elementInst.pm.getGeomanDrawLayers();
layers.forEach((layer) => {
if (layer instanceof L.Circle) {
// convert the circle layer to polygon layer
group.addLayer(L.PM.Utils.circleToPolygon(layer));
} else {
group.addLayer(layer);
}
});
this.fire('px-map-draw-finished', group.toGeoJSON());
this._toggleFinishBtnEnalbeState(false);
this.elementInst.pm.disableGlobalRemovalMode();
},
/**
* Handle the event when removal mode is toggled.
*
* @param {*} evt
*/
_handleRemovalModeToggled(evt) {
this.fire('px-map-removal-mode-changed', {removalEnabled: this.elementInst.pm.globalRemovalModeEnabled()});
}
/**
* Fired when user clicking on the custom Finish button.
*
* * {Object} detail - Contains the event details, the feature colletion of drawn polygons.
*
* @event px-map-draw-finished
*/
/**
* Fired when the layer is added/removed.
*
* * {Object} detail - Contains the event details - flag to indicate still has drawn layers or not.
*
* @event px-map-drawn-layer-changed
*/
/**
* Fired when the removal mode is toggled.
*
* * {Object} detail - Contains the event details - removal is enable or not.
*
* @event px-map-removal-mode-changed
*/
};
/**
*
* @polymerBehavior PxMapBehavior.LeafletRoot
*/
PxMapBehavior.LeafletRootImpl = {
properties: {
/**
* The coordinate reference system to use when projecting geographic points
* into pixel coordinates. Can only be set once before the map is first
* initialized. If you don't know what this is, do not set it and the map
* will default to the most common web mapping projection (EPSG3857).
*
* @type {L.CRS}
*/
crs: {
type: Object
},
/**
* The latitude of the active map center. Can be used to set or update
* the center of the map, or read from after the user moves the map to
* get updated coordinates.
*
* @type {Number}
*/
lat: {
type: Number,
value: 37.7672375,
notify: true,
observer: 'shouldUpdateInst'
},
/**
* The longitude of the active map center. Can be used to set or update
* the center of the map, or read from after the user moves the map to
* get updated coordinates.
*
* @type {Number}
*/
lng: {
type: Number,
value: -121.9584131,
notify: true,
observer: 'shouldUpdateInst'
},
/**
* The zoom level of the active map. Can be used to set or update
* the zoom level of the map, or read from after the user changes the
* map zoom level to an updated value.
*
* @type {Number}
*/
zoom: {
type: Number,
value: 10,
notify: true,
observer: 'shouldUpdateInst'
},
/**
* The maximum zoom level for the active map (the furthest the user can
* zoom in). Setting it at the map level will take precedence over the
* max zoom of all other layers, including tile layers. If you need to
* set different zoom bounds based on the visible tile layer, set the
* max zoom directly on your tile layer.
*
* @type {Number}
*/
maxZoom: {
type: Number,
observer: 'shouldUpdateInst'
},
/**
* The minimum zoom level for the active map (the furthest the user can
* zoom out). Setting it at the map level will take precedence over the
* min zoom of all other layers, including tile layers. If you need to
* set different zoom bounds based on the visible tile layer, set the
* min zoom directly on your tile layer.
*
* @type {Number}
*/
minZoom: {
type: Number,
observer: 'shouldUpdateInst'
},
/**
* Restricts the user from moving the map outside of a specific geographic
* boundary. The user will be bounced back if they attempt to pan outside the view.
* Disabled by default, letting the user pan to any point on the map.
*
* Pass an array of [lat,lng] values like the following:
*
* [[40.712, -74.227], [40.774, -74.125]]
*
* The first pair should represent the southwest extend of the boundary,
* and the second pair should represent the northeast extend of the
* boundary.
*
* @type {Array}
*/
maxBounds: {
type: Array,
observer: 'shouldUpdateInst'
},
/**
* Set to disable dragging of the map with the mouse or by touch. Use to
* restrict changing the map's visible area (e.g. for a static map) or
* to set up a map for being updated programmatically (e.g. through regular
* responses from an API).
*
* @type {Boolean}
*/
disableDragging: {
type: Boolean,
value: false,
observer: 'shouldUpdateInst'
},
/**
* Set to disable zooming with the scroll wheel. Useful if you have a map
* that takes up the full width of a page and want to allow the user to
* scroll/swipe past without getting stuck in a zoom-in-zoom-out loop.
*
* @type {Boolean}
*/
disableScrollZoom: {
type: Boolean,
value: false,
observer: 'shouldUpdateInst'
},
/**
* Set to disable the two-finger zoom gesture on touch devices.
*
* @type {Boolean}
*/
disableTouchZoom: {
type: Boolean,
value: false,
observer: 'shouldUpdateInst'
},
/**
* Set to disable zooming on double-click.
*
* @type {Boolean}
*/
disableDoubleClickZoom: {
type: Boolean,
value: false,
observer: 'shouldUpdateInst'
},
/**
* Set to disable the attribution control, which can be used to show the
* source of tile layers or other data overlays.
*
* This property is not dynamic and can only be set once when the map is
* first initialized.
*
* @type {Boolean}
*/
disableAttribution: {
type: Boolean,
value: false
},
/**
* Stringified HTML that will be used as the first item in your attribution
* list. Pass an <a> tag with a link to more information about your
* attribution source. Example: '<a href="https://example.com">Example</a>'
*
* Defaults to a link to the Leaflet.js library. If an empty string is
* passed ("") the prefix will be hidden.
*
* @type {String}
*/
attributionPrefix: {
type: String,
value: '<a href="http://leafletjs.com" title="A JS library for interactive maps">Leaflet</a>',
observer: 'shouldUpdateInst'
},
/**
* Uses flexbox to set the size of the map. Set the parent container
* to use `display: flex;` in your CSS and the map will automatically
* fill the container's available height and width.
*
* @type {Boolean}
*/
flexToSize: {
type: Boolean,
reflectToAttribute: true,
value: false
}
},
attached() {
this.listen(this, 'px-map-element-ready-to-add', 'shouldAddInst');
if (Polymer.Element) {
this._afterFirstRender = false;
Polymer.RenderStatus.afterNextRender(this, () => {
this._afterFirstRender = true;
if (this.canAddInst()) {
this.fire('px-map-element-ready-to-add');
}
});
}
else {
this._afterFirstRender = true;
}
if (this.canAddInst()) {
this.fire('px-map-element-ready-to-add');
}
},
detached() {
this.unlisten(this, 'px-map-element-ready-to-add', 'shouldAddInst');
this.shouldRemoveInst();
this.removeInst();
},
shouldAddInst(evt) {
if (Polymer.dom(evt).rootTarget !== this) return;
PxMapBehavior.ElementImpl.shouldAddInst.call(this);
this.addInst();
},
canAddInst() {
if (typeof this.zoom !== 'undefined' && this._canBeNum(this.zoom) && this._afterFirstRender) {
return this.latLngIsValid(this.lat, this.lng, true);
}
},
createInst(options) {
const mapEl = Polymer.dom(this.root).querySelector('#map');
const mapInst = L.map(mapEl, options);
mapInst.attributionControl.setPrefix(options.attributionPrefix);
if (this.isShadyScoped()) {
mapInst.__addShadyScope = this.scopeSubtree.bind(this);
}
return mapInst;
},
addInst() {
// @TODO: This is a shim for browsers without shadow DOM. We need to
// re-append the `#map` element or it won't get the 'style-scope' CSS
// classes needed to style it or its children. That's bad. When the
// polyfill is updated or support is cut for browsers without shadow
// DOM, this should be removed.
if (this.isShadyScoped()) {
this.scopeSubtree(this.$.map, true);
}
// Bind custom events for the map intance. Events will be unbound automatically.
const mapMoveFn = this._handleMapMove.bind(this);
const zoomStartFn = this._handleZoomStart.bind(this);
const zoomEndFn = this._handleZoomEnd.bind(this);
this.bindEvents({
'moveend' : mapMoveFn,
'zoomstart' : zoomStartFn,
'zoomend' : zoomEndFn
});
},
removeInst() {
// Stop watching the shady root map element for changes
if (this.isShadyScoped()) {
this.scopeSubtree(this.$.map, false);
}
},
getInstOptions() {
const options = {};
// Static options
options.zoomControl = false;
// Dynamic options
options.crs = this.crs || L.CRS.EPSG3857;
options.center = [this.lat, this.lng];
options.zoom = this.zoom;
options.minZoom = this.minZoom || 0;
options.maxZoom = this.maxZoom || 18;
options.maxBounds = this.maxBounds || undefined;
options.dragging = !this.disableDragging;
options.scrollWheelZoom = !this.disableScrollZoom;
options.touchZoom = !this.disableTouchZoom;
options.doubleClickZoom = !this.disableDoubleClickZoom;
options.attributionControl = !this.disableAttribution;
options.attributionPrefix = this.attributionPrefix;
return options;
},
updateInst(lastOptions, nextOptions) {
if ((this.latLngIsValid(nextOptions.center[0], nextOptions.center[1])) &&
(lastOptions.center[0] !== nextOptions.center[0] ||
lastOptions.center[1] !== nextOptions.center[1] ||
lastOptions.zoom !== nextOptions.zoom)) {
this._updateMapView();
}
if (lastOptions.maxZoom !== nextOptions.maxZoom && !isNaN(nextOptions.maxZoom)) {
this.elementInst.setMaxZoom(nextOptions.maxZoom);
}
if (lastOptions.minZoom !== nextOptions.minZoom && !isNaN(nextOptions.minZoom)) {
this.elementInst.setMinZoom(nextOptions.minZoom);
}
if (lastOptions.maxBounds !== nextOptions.maxBounds && !isNaN(nextOptions.maxBounds)) {
this.elementInst.setMaxBounds(nextOptions.maxBounds);
}
if (!lastOptions.dragging && nextOptions.dragging) {
this.elementInst.dragging.enable();
}
if (lastOptions.dragging && !nextOptions.dragging) {
this.elementInst.dragging.disable();
}
if (!lastOptions.scrollWheelZoom && nextOptions.scrollWheelZoom) {
this.elementInst.scrollWheelZoom.enable();
}
if (lastOptions.scrollWheelZoom && !nextOptions.scrollWheelZoom) {
this.elementInst.scrollWheelZoom.disable();
}
if (!lastOptions.touchZoom && nextOptions.touchZoom) {
this.elementInst.touchZoom.enable();
}
if (lastOptions.touchZoom && !nextOptions.touchZoom) {
this.elementInst.touchZoom.disable();
}