mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-08-07 03:30:36 +00:00
302 lines
9.4 KiB
JavaScript
302 lines
9.4 KiB
JavaScript
/*\
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title: $:/plugins/tiddlywiki/geospatial/geomap.js
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type: application/javascript
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module-type: widget
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Leaflet map widget
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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var Widget = require("$:/core/modules/widgets/widget.js").widget;
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var GeomapWidget = function(parseTreeNode,options) {
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this.initialise(parseTreeNode,options);
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};
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/*
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Inherit from the base widget class
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*/
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GeomapWidget.prototype = new Widget();
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/*
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Render this widget into the DOM
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*/
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GeomapWidget.prototype.render = function(parent,nextSibling) {
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// Housekeeping
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this.parentDomNode = parent;
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this.computeAttributes();
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this.execute();
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// Render the children into a hidden DOM node
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var parser = {
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tree: [{
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type: "widget",
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attributes: {},
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orderedAttributes: [],
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children: this.parseTreeNode.children || []
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}]
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};
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this.contentRoot = this.wiki.makeWidget(parser,{
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document: $tw.fakeDocument,
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parentWidget: this
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});
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this.contentContainer = $tw.fakeDocument.createElement("div");
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this.contentRoot.render(this.contentContainer,null);
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// Render a wrapper for the map
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this.domNode = this.document.createElement("div");
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this.domNode.style.width = "100%";
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this.domNode.style.height = "600px";
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// Insert it into the DOM
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parent.insertBefore(this.domNode,nextSibling);
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this.domNodes.push(this.domNode);
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// Render the map
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if($tw.browser) {
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this.renderMap();
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this.refreshMap();
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}
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};
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GeomapWidget.prototype.renderMap = function() {
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var self = this;
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// Create the map
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this.map = $tw.Leaflet.map(this.domNode);
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// No layers rendered
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this.renderedLayers = [];
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this.baseLayers = [];
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// Disable Leaflet attribution
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this.map.attributionControl.setPrefix("");
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// Add scale
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$tw.Leaflet.control.scale().addTo(this.map);
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// Listen for pan and zoom events and update the state tiddler
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this.map.on("moveend zoomend",function(event) {
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if(self.geomapStateTitle) {
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var c = self.map.getCenter(),
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lat = "" + c.lat,
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long = "" + c.lng,
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zoom = "" + self.map.getZoom(),
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tiddler = self.wiki.getTiddler(self.geomapStateTitle);
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// Only write the tiddler if the values have changed
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if(!tiddler || tiddler.fields.lat !== lat || tiddler.fields.long !== long || tiddler.fields.zoom !== zoom) {
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self.wiki.addTiddler(new $tw.Tiddler({
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title: self.geomapStateTitle,
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lat: lat,
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long: long,
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zoom: zoom
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}));
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}
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}
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});
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};
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GeomapWidget.prototype.refreshMap = function() {
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var self = this;
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// Remove any previously rendered layers
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$tw.utils.each(this.renderedLayers,function(layer) {
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self.map.removeLayer(layer.layer);
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});
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this.renderedLayers = []; // Array of {name:,layer:}
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$tw.utils.each(this.renderedBaseLayers,function(baseLayer) {
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self.map.removeLayer(baseLayer.layer);
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});
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this.renderedBaseLayers = []; // Array of {name:,layer:}
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// Create default icon
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var iconProportions = 365/560,
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iconHeight = 50;
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var myIcon = new $tw.Leaflet.Icon({
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iconUrl: $tw.utils.makeDataUri(this.wiki.getTiddlerText("$:/plugins/tiddlywiki/geospatial/images/markers/pin"),"image/svg+xml"),
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iconSize: [iconHeight * iconProportions, iconHeight], // Size of the icon
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iconAnchor: [(iconHeight * iconProportions) / 2, iconHeight], // Position of the anchor within the icon
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popupAnchor: [0, -iconHeight] // Position of the popup anchor relative to the icon anchor
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});
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// Counter for autogenerated names
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var untitledCount = 1;
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// Process embedded geobaselayer widgets
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function loadBaseLayer(layerInfo) {
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if(layerInfo.title) {
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var tiddler = self.wiki.getTiddler(layerInfo.title);
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if(tiddler) {
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layerInfo.name = layerInfo.name || tiddler.fields["caption"];
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layerInfo.tilesUrl = layerInfo.tilesUrl || tiddler.fields["tiles-url"];
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layerInfo.maxZoom = layerInfo.maxZoom || tiddler.fields["max-zoom"];
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layerInfo.attribution = layerInfo.attribution || tiddler.fields.text;
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}
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}
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var baseLayer = $tw.Leaflet.tileLayer(layerInfo.tilesUrl, {
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maxZoom: layerInfo.maxZoom,
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attribution: layerInfo.attribution
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});
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if(self.renderedBaseLayers.length === 0) {
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baseLayer.addTo(self.map)
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}
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var name = layerInfo.name || ("Untitled " + untitledCount++);
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self.renderedBaseLayers.push({name: name, layer: baseLayer});
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}
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this.findChildrenDataWidgets(this.contentRoot.children,"geobaselayer",function(widget) {
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loadBaseLayer({
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name: widget.getAttribute("name"),
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title: widget.getAttribute("title"),
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tilesUrl: widget.getAttribute("tiles-url"),
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maxZoom: widget.getAttribute("max-zoom"),
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attribution: widget.getAttribute("attribution"),
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});
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});
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// Create the default base map if none was specified
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if(this.renderedBaseLayers.length === 0) {
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// Render in reverse order so that the first tagged base layer will be rendered last, and hence take priority
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var baseLayerTitles = this.wiki.filterTiddlers("[all[tiddlers+shadows]tag[$:/tags/GeoBaseLayer]]");
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$tw.utils.each(baseLayerTitles,function(title) {
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loadBaseLayer({title: title});
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});
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}
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if(this.renderedBaseLayers.length === 0) {
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loadBaseLayer({title: "$:/plugins/tiddlywiki/geospatial/baselayers/openstreetmap"});
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}
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// Make a marker cluster
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var markers = $tw.Leaflet.markerClusterGroup({
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maxClusterRadius: 40
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});
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this.map.addLayer(markers);
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// Process embedded geolayer widgets
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this.findChildrenDataWidgets(this.contentRoot.children,"geolayer",function(widget) {
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var jsonText = widget.getAttribute("json"),
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geoJson = [];
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if(jsonText) {
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// Layer is defined by JSON blob
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geoJson = $tw.utils.parseJSONSafe(jsonText,[]);
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} else if(widget.hasAttribute("lat") && widget.hasAttribute("long")) {
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// Layer is defined by lat long fields
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var lat = $tw.utils.parseNumber(widget.getAttribute("lat","0")),
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long = $tw.utils.parseNumber(widget.getAttribute("long","0")),
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alt = $tw.utils.parseNumber(widget.getAttribute("alt","0"));
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geoJson = {
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"type": "FeatureCollection",
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"features": [
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{
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"type": "Feature",
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"geometry": {
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"type": "Point",
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"coordinates": [long,lat,alt]
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}
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}
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]
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};
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}
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var draggable = widget.getAttribute("draggable","no") === "yes",
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layer = $tw.Leaflet.geoJSON(geoJson,{
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style: function(geoJsonFeature) {
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return {
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color: widget.getAttribute("color","yellow")
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}
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},
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pointToLayer: function(geoJsonPoint,latlng) {
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var marker = $tw.Leaflet.marker(latlng,{icon: myIcon,draggable: draggable});
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marker.addTo(markers);
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marker.on("moveend",function(event) {
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var latlng = event.sourceTarget.getLatLng();
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self.invokeActionString(widget.getAttribute("updateActions"),null,event,{
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lat: latlng.lat,
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long: latlng.lng
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});
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});
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return markers;
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},
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onEachFeature: function(feature,layer) {
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if(feature.properties) {
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layer.bindPopup(JSON.stringify(feature.properties,null,4));
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}
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}
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}).addTo(self.map);
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var name = widget.getAttribute("name") || ("Untitled " + untitledCount++);
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self.renderedLayers.push({name: name, layer: layer});
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});
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// Setup the layer control
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if(this.layerControl) {
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this.map.removeControl(this.layerControl);
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}
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var baseLayers = {};
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$tw.utils.each(this.renderedBaseLayers,function(layer) {
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baseLayers[layer.name] = layer.layer;
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});
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var overlayLayers = {};
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$tw.utils.each(this.renderedLayers,function(layer) {
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overlayLayers[layer.name] = layer.layer;
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});
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this.layerControl = $tw.Leaflet.control.layers(baseLayers,overlayLayers,{
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collapsed: this.geomapLayersPanel !== "open"
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}).addTo(this.map);
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// Restore the saved map position and zoom level
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if(!this.setMapView()) {
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// If there was no saved position then look at the startPosition attribute
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switch(this.geomapStartPosition) {
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case "bounds":
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var bounds = null;
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$tw.utils.each(this.renderedLayers,function(layer) {
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var featureBounds = layer.layer.getBounds();
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if(bounds) {
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bounds.extend(featureBounds);
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} else {
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bounds = featureBounds;
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}
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});
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if(bounds) {
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this.map.fitBounds(bounds);
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} else {
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this.map.fitWorld();
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}
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break;
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default:
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this.map.fitWorld();
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break;
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}
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}
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};
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/*
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Set the map center and zoom level from the values in the state tiddler. Returns true if the map view was successfully set
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*/
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GeomapWidget.prototype.setMapView = function() {
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var stateTiddler = this.geomapStateTitle && this.wiki.getTiddler(this.geomapStateTitle);
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if(stateTiddler) {
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this.map.setView([$tw.utils.parseNumber(stateTiddler.fields.lat,0),$tw.utils.parseNumber(stateTiddler.fields.long,0)], $tw.utils.parseNumber(stateTiddler.fields.zoom,0));
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return true;
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}
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return false;
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};
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/*
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Compute the internal state of the widget
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*/
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GeomapWidget.prototype.execute = function() {
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this.geomapStateTitle = this.getAttribute("state");
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this.geomapStartPosition = this.getAttribute("startPosition");
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this.geomapLayersPanel = this.getAttribute("layersPanel");
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};
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/*
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Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
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*/
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GeomapWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes();
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// Refresh child nodes, and rerender map if there have been any changes
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var result = this.contentRoot.refresh(changedTiddlers);
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if(result) {
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this.refreshMap();
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} else {
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// If we're not doing a full refresh, reset the position if the state tiddler has changed
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if(changedAttributes.state || changedTiddlers[this.geomapStateTitle]) {
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this.geomapStateTitle = this.getAttribute("state");
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this.setMapView();
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}
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}
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return result;
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};
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exports.geomap = GeomapWidget;
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})();
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