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/* global ol */
function GeometryTypeControl(opt_options) {
'use strict';
// Map control to switch type when geometry type is unknown
const options = opt_options || {};
const element = document.createElement('div');
element.className = 'switch-type type-' + options.type + ' ol-control ol-unselectable';
if (options.active) {
element.classList.add("type-active");
}
const self = this;
const switchType = function(e) {
e.preventDefault();
if (options.widget.currentGeometryType !== self) {
options.widget.map.removeInteraction(options.widget.interactions.draw);
options.widget.interactions.draw = new ol.interaction.Draw({
features: options.widget.featureCollection,
type: options.type
});
options.widget.map.addInteraction(options.widget.interactions.draw);
options.widget.currentGeometryType.element.classList.remove('type-active');
options.widget.currentGeometryType = self;
element.classList.add("type-active");
}
};
element.addEventListener('click', switchType, false);
element.addEventListener('touchstart', switchType, false);
ol.control.Control.call(this, {
element: element
});
};
ol.inherits(GeometryTypeControl, ol.control.Control);
// TODO: allow deleting individual features (#8972)
(function() {
'use strict';
const jsonFormat = new ol.format.GeoJSON();
function MapWidget(options) {
this.map = null;
this.interactions = {draw: null, modify: null};
this.typeChoices = false;
this.ready = false;
// Default options
this.options = {
default_lat: 0,
default_lon: 0,
default_zoom: 12,
is_collection: options.geom_name.indexOf('Multi') > -1 || options.geom_name.indexOf('Collection') > -1
};
// Altering using user-provided options
for (const property in options) {
if (options.hasOwnProperty(property)) {
this.options[property] = options[property];
}
}
if (!options.base_layer) {
this.options.base_layer = new ol.layer.Tile({source: new ol.source.OSM()});
}
this.map = this.createMap();
this.featureCollection = new ol.Collection();
this.featureOverlay = new ol.layer.Vector({
map: this.map,
source: new ol.source.Vector({
features: this.featureCollection,
useSpatialIndex: false // improve performance
}),
updateWhileAnimating: true, // optional, for instant visual feedback
updateWhileInteracting: true // optional, for instant visual feedback
});
// Populate and set handlers for the feature container
const self = this;
this.featureCollection.on('add', function(event) {
const feature = event.element;
feature.on('change', function() {
self.serializeFeatures();
});
if (self.ready) {
self.serializeFeatures();
if (!self.options.is_collection) {
self.disableDrawing(); // Only allow one feature at a time
}
}
});
const initial_value = document.getElementById(this.options.id).value;
if (initial_value) {
const features = jsonFormat.readFeatures('{"type": "Feature", "geometry": ' + initial_value + '}');
const extent = ol.extent.createEmpty();
features.forEach(function(feature) {
this.featureOverlay.getSource().addFeature(feature);
ol.extent.extend(extent, feature.getGeometry().getExtent());
}, this);
// Center/zoom the map
this.map.getView().fit(extent, {maxZoom: this.options.default_zoom});
} else {
this.map.getView().setCenter(this.defaultCenter());
}
this.createInteractions();
if (initial_value && !this.options.is_collection) {
this.disableDrawing();
}
this.ready = true;
}
MapWidget.prototype.createMap = function() {
const map = new ol.Map({
target: this.options.map_id,
layers: [this.options.base_layer],
view: new ol.View({
zoom: this.options.default_zoom
})
});
return map;
};
MapWidget.prototype.createInteractions = function() {
// Initialize the modify interaction
this.interactions.modify = new ol.interaction.Modify({
features: this.featureCollection,
deleteCondition: function(event) {
return ol.events.condition.shiftKeyOnly(event) &&
ol.events.condition.singleClick(event);
}
});
// Initialize the draw interaction
let geomType = this.options.geom_name;
if (geomType === "Unknown" || geomType === "GeometryCollection") {
// Default to Point, but create icons to switch type
geomType = "Point";
this.currentGeometryType = new GeometryTypeControl({widget: this, type: "Point", active: true});
this.map.addControl(this.currentGeometryType);
this.map.addControl(new GeometryTypeControl({widget: this, type: "LineString", active: false}));
this.map.addControl(new GeometryTypeControl({widget: this, type: "Polygon", active: false}));
this.typeChoices = true;
}
this.interactions.draw = new ol.interaction.Draw({
features: this.featureCollection,
type: geomType
});
this.map.addInteraction(this.interactions.draw);
this.map.addInteraction(this.interactions.modify);
};
MapWidget.prototype.defaultCenter = function() {
const center = [this.options.default_lon, this.options.default_lat];
if (this.options.map_srid) {
return ol.proj.transform(center, 'EPSG:4326', this.map.getView().getProjection());
}
return center;
};
MapWidget.prototype.enableDrawing = function() {
this.interactions.draw.setActive(true);
if (this.typeChoices) {
// Show geometry type icons
const divs = document.getElementsByClassName("switch-type");
for (let i = 0; i !== divs.length; i++) {
divs[i].style.visibility = "visible";
}
}
};
MapWidget.prototype.disableDrawing = function() {
if (this.interactions.draw) {
this.interactions.draw.setActive(false);
if (this.typeChoices) {
// Hide geometry type icons
const divs = document.getElementsByClassName("switch-type");
for (let i = 0; i !== divs.length; i++) {
divs[i].style.visibility = "hidden";
}
}
}
};
MapWidget.prototype.clearFeatures = function() {
this.featureCollection.clear();
// Empty textarea widget
document.getElementById(this.options.id).value = '';
this.enableDrawing();
};
MapWidget.prototype.serializeFeatures = function() {
// Three use cases: GeometryCollection, multigeometries, and single geometry
let geometry = null;
const features = this.featureOverlay.getSource().getFeatures();
if (this.options.is_collection) {
if (this.options.geom_name === "GeometryCollection") {
const geometries = [];
for (let i = 0; i < features.length; i++) {
geometries.push(features[i].getGeometry());
}
geometry = new ol.geom.GeometryCollection(geometries);
} else {
geometry = features[0].getGeometry().clone();
for (let j = 1; j < features.length; j++) {
switch (geometry.getType()) {
case "MultiPoint":
geometry.appendPoint(features[j].getGeometry().getPoint(0));
break;
case "MultiLineString":
geometry.appendLineString(features[j].getGeometry().getLineString(0));
break;
case "MultiPolygon":
geometry.appendPolygon(features[j].getGeometry().getPolygon(0));
}
}
}
} else {
if (features[0]) {
geometry = features[0].getGeometry();
}
}
document.getElementById(this.options.id).value = jsonFormat.writeGeometry(geometry);
};
window.MapWidget = MapWidget;
})();
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