var regionChooser = (function(){
//TODO: Somehow split in classes. This file is getting too big and mixed
var publicScope = {};
var fromJavaFX = navigator.userAgent.indexOf('JavaFX') !== -1;
var dataPanel = $('#dataPanel');
var wgs84Sphere = new ol.Sphere(6378137);
var features_by_project;
var gmlId;
publicScope.init = function(){
//NOTE: Only called from JavaFX. At startup, or when Repo has been changed.
gmlId = 0;
kml_source.clear();
document.getElementById("select_repository").style.visibility = "visible";
}
if (fromJavaFX){
document.documentElement.className = 'wait';
}
var osm_layer = new ol.layer.Tile({
source: new ol.source.OSM()
});
function read_kml(url){
return new ol.source.KML({
projection : ol.proj.get('EPSG:3857'),
url : url,
extractAttributes : false,
extractStyles : false
});
}
var kml_source = read_kml(fromJavaFX ? undefined : 'data/citygml_hulls.kml');
function polygon_style(color, alpha) {
return new ol.style.Style({
fill : new ol.style.Fill({
color : 'rgba(255, 255, 255,' + alpha + ')'
}),
stroke : new ol.style.Stroke({
color : color,
width : 2,
lineDash : [ 5, 10 ]
}),
});
}
var kml_layer = new ol.layer.Vector({
source : kml_source,
style : polygon_style('#447744', 0.2)
});
var intersections = new ol.source.Vector();
var intersections_layer = new ol.layer.Vector({
source : intersections,
style : new ol.style.Style({
fill : new ol.style.Fill({
color : 'rgba(255, 155, 51, 0.2)'
})
})
});
publicScope.addCityGmlHull = function(kmlString) {
options = {featureProjection: ol.proj.get('EPSG:3857')};
feature = kmlFormat.readFeature(kmlString, options);
feature.setId(gmlId++);
kml_source.addFeature(feature);
dataPanel.append('.');
srsName = feature.get("srsName");
if (proj4.defs(srsName) === undefined){
console.warn(srsName + " isn't defined by Proj4js!")
}
};
var map = new ol.Map({
target : 'map',
layers : [ osm_layer, kml_layer, intersections_layer ],
interactions : ol.interaction.defaults({
keyboard : true
})
});
var geoJsonFormat = new ol.format.GeoJSON();
var kmlFormat = new ol.format.KML({extractStyles: false});
kml_layer.addEventListener("change", function() {
map.getView().fitExtent(kml_source.getExtent(), (map.getSize()));
});
function updateGMLPolygons() {
kml_source.forEachFeature(function(feature) {
feature["geoJSON"] = geoJsonFormat.writeFeatureObject(feature);
feature["area"] = feature.getGeometry().getArea();
feature["project"] = feature.get("project");
feature["name"] = feature.get("name");
feature["source"] = "CityGML";
});
features_by_project = groupBy(kml_source.getFeatures(), "project");
// Sort CityGMLs inside each project
Object.values(features_by_project).forEach(features => features.sort((a, b) => a.name.localeCompare(b.name)));
}
// The features are not added to a regular vector layer/source,
// but to a feature overlay which holds a collection of features.
// This collection is passed to the modify and also the draw
// interaction, so that both can add or modify features.
var featureOverlay = new ol.FeatureOverlay({
style : new ol.style.Style({
fill : new ol.style.Fill({
color : 'rgba(255, 155, 51, 0.5)'
}),
stroke : new ol.style.Stroke({
color : '#ffcc33',
width : 4
}),
image : new ol.style.Circle({
radius : 5,
fill : new ol.style.Fill({
color : '#ffcc33'
})
})
})
});
featureOverlay.setMap(map);
//TODO: Rename to Javascript naming convention (CamelCase).
var selected_features = featureOverlay.getFeatures();
selected_features.on('add', function(event) {
var feature = event.element;
feature.on("change", function() {
displayInfo();
});
});
var modify = new ol.interaction.Modify({
features : featureOverlay.getFeatures(),
// the SHIFT key must be pressed to delete vertices, so
// that new vertices can be drawn at the same position
// of existing vertices
deleteCondition : function(event) {
return ol.events.condition.shiftKeyOnly(event) && ol.events.condition.singleClick(event);
}
});
map.addInteraction(modify);
var draw = new ol.interaction.Draw({
features : featureOverlay.getFeatures(),
type : 'Polygon'
});
map.addInteraction(draw);
var sketch;
draw.on('drawstart', function(evt) {
sketch = evt.feature;
updateGMLPolygons();
});
var sourceProj = map.getView().getProjection();
function showLinkToDownload(feature, jsonIntersection, polygonArea){
var intersection = geoJsonFormat.readFeature(jsonIntersection);
var intersectionArea = intersection.getGeometry().getArea();
var citygml_percentage = Math.round(intersectionArea / feature["area"] * 100);
var sketch_percentage = Math.round(intersectionArea / polygonArea * 100);
intersections.addFeature(intersection);
var link = '
'
// TODO: If possible, highlight the corresponding polygon when hovering above a name.
link += '';
link += " (" + citygml_percentage + "%";
if (sketch_percentage == 100) {
link += ", all inside";
}
dataPanel.append(link + ")\n");
}
publicScope.isDownloadPossible = function(){
var checkedBoxes = Array.from(document.querySelectorAll("input.select_citygml")).filter(c => c.checked);
document.getElementById("download_region_button").disabled = (checkedBoxes.length == 0);
}
function findIntersection(feature, polygon) {
try {
return turf.intersect(polygon, feature["geoJSON"]);
} catch (err) {
console.log(feature.get('name') + " - " + err);
}
}
function findIntersections() {
var polygon = geoJsonFormat.writeFeatureObject(sketch);
var polygonArea = sketch.getGeometry().getArea();
var intersection_found = false;
intersections.clear();
Object.keys(features_by_project).forEach(function(project) {
features = features_by_project[project];
features_and_intersections = features.map(f=> [f, findIntersection(f,polygon)]).filter(l => l[1] !== undefined);
if (features_and_intersections.length > 0){
intersection_found = true;
dataPanel.append("
" + project);
features_and_intersections.forEach(l => showLinkToDownload(l[0], l[1], polygonArea));
}
});
if (intersection_found) {
document.getElementById("download_region").style.visibility = 'visible';
}
else {
document.getElementById("download_region").style.visibility = 'hidden';
dataPanel.append("No intersection found with any CityGML file. \n");
}
}
publicScope.display = function(text){
dataPanel.append(text + " \n");
}
publicScope.downloadRegionFromCityGMLs = function(checkbox_ids) {
var features = checkbox_ids.map(checkbox_id => {
var i = Number(checkbox_id.replace("citygml_", ""));
return kml_source.getFeatureById(i);
})
var project = features[0].get("project");
var srsName = features[0].get("srsName");
if (!features.every( f => f.get("project") === project)){
dataPanel.prepend("
Sorry, the CityGML files should all belong to the same project.
\n");
return;
}
if (!features.every( f => f.get("srsName") === srsName)){
dataPanel.prepend("
Sorry, the CityGML files should all be written with the same coordinate system.
\n");
}
document.documentElement.className = 'wait';
var citygmlNames = features.map(f => f.get("name"));
// Waiting 100ms in order to let the cursor change
setTimeout(function() {
var start = new Date().getTime();
if (proj4.defs(srsName)){
console.log("Selected region is written in " + srsName + " coordinate system.");
try {
var count = fxapp.downloadRegionFromCityGMLs(sketchAsWKT(srsName), project, citygmlNames.join(";"), srsName);
if (count == -1){
console.log("No output file has been selected.");
} else {
dataPanel.prepend("
\n");
}
var end = new Date().getTime();
var time = end - start;
console.log('Download Execution time: ' + (time / 1000).toFixed(3) + 's');
setTimeout(function() {
document.getElementById("download_region_button").disabled = false;
document.documentElement.className = ''; // Stop waiting
}, 100);
} else {
var msg = "ERROR : Unknown coordinate system : \"" + srsName + "\". Cannot extract any region";
console.log(msg);
dataPanel.append(msg + " \n");
}
}, 100);
}
function displayInfo() {
dataPanel.empty();
var geom = sketch.getGeometry().clone().transform(sourceProj, 'EPSG:4326');
var coordinates = geom.getLinearRing(0).getCoordinates();
var area = Math.abs(wgs84Sphere.geodesicArea(coordinates));
//NOTE: Could show m², ha or km² depending on magnitude
dataPanel.append("
\n");
dataPanel.append("You can draw a polygon on the map by clicking. \n");
dataPanel.append("You can add a new point to an existing edge by clicking and dragging. \n");
dataPanel.append("You can remove a point with SHIFT + clicking. \n");
dataPanel.append("You can cancel drawing with ESC or DEL.
\n");
dataPanel.append("After drawing a polygon which intersects with at least one GML file, \n");
dataPanel.append("you can download the corresponding part by checking the \n");
dataPanel.append("desired filenames and clicking on 'Download' button. \n");
dataPanel.append(" \n");
dataPanel.append("More info is available in the ");
dataPanel.append("SimStadt documentation \n");
}
// Executed by JavaFX when whole page is loaded.
publicScope.ready = function() {
updateGMLPolygons();
displayHelp();
document.documentElement.className = ''; // Stop waiting
console.log("Ready!");
}
publicScope.downloadFromSelectedCityGMLs = function() {
document.getElementById("download_region_button").disabled = true;
var checkedBoxes = Array.from(document.querySelectorAll("input.select_citygml")).filter(c => c.checked);
// CheckBoxes isn't empty, because otherwise the button cannot be clicked.
publicScope.downloadRegionFromCityGMLs(checkedBoxes.map(c => c.id));
}
publicScope.checkCityGMLS = function(allOrNone) {
document.querySelectorAll("input.select_citygml").forEach(c => c.checked = allOrNone);
publicScope.isDownloadPossible();
}
publicScope.selectRepository = function() {
fxapp.selectRepository();
}
publicScope.copyCoordinatesToClipboard = function(){
var geom = sketch.getGeometry().clone().transform(sourceProj, 'EPSG:4326');
var wgs84Coords = geom.getLinearRing(0).getCoordinates();
var wktPolygon = "POLYGON((";
wktPolygon += wgs84Coords.map(lonLat => lonLat.join(" ")).join(", ");
publicScope.copyToClipboard(wktPolygon + "))");
}
// Copies a string to the clipboard. Must be called from within an
// event handler such as click. May return false if it failed, but
// this is not always possible. Browser support for Chrome 43+,
// Firefox 42+, Safari 10+, Edge and Internet Explorer 10+.
// Internet Explorer: The clipboard feature may be disabled by
// an administrator. By default a prompt is shown the first
// time the clipboard is used (per session).
// https://stackoverflow.com/a/33928558/6419007
publicScope.copyToClipboard = function(text) {
if (window.clipboardData && window.clipboardData.setData) {
// Internet Explorer-specific code path to prevent textarea being shown while dialog is visible.
return window.clipboardData.setData("Text", text);
}
else if (document.queryCommandSupported && document.queryCommandSupported("copy")) {
var textarea = document.createElement("textarea");
textarea.textContent = text;
textarea.style.position = "fixed"; // Prevent scrolling to bottom of page in Microsoft Edge.
document.body.appendChild(textarea);
textarea.select();
try {
document.execCommand("copy"); // Security exception may be thrown by some browsers.
dataPanel.append("
Coordinates copied to clipboard!
\n");
return;
}
catch (ex) {
console.warn("Copy to clipboard failed.", ex);
return prompt("Copy to clipboard: Ctrl+C, Enter", text);
}
finally {
document.body.removeChild(textarea);
}
}
}
publicScope.showRepositoryName = function(path) {
document.getElementById("repo_path").textContent = path;
}
focusOnMap();
//var regionChooser = publicScope; //NOTE: In order to open closure. For debugging
return publicScope;
})();