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ol-helpers.js
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// Openlayers preview module
if (typeof proj4 != "undefined" && proj4) {
window.Proj4js = {
Proj: function (code) {
if (Proj4js.defs[code])
return proj4(Proj4js.defs[code]);
var shortCode = code.replace(
/urn:ogc:def:crs:(\w+):(.*:)?(\w+)$/, "$1:$3"
)
// side-effect : add long-form code as alias
if (code != shortCode)
Proj4js.defs(code, Proj4js.defs[shortCode]);
return Proj4js.defs[shortCode] && proj4(Proj4js.defs[shortCode]);
},
defs: proj4.defs,
transform: proj4
};
}
if (!ol.source.State) {
ol.source.State = {
UNDEFINED: 'undefined',
LOADING: 'loading',
READY: 'ready',
ERROR: 'error'
};
}
/* override source state property with internal value to have finer event listening on layer loading */
var OLgetState = ol.source.Vector.prototype.getState;
ol.source.Vector.prototype.getState = function() {
return this.get('HL_state') || OLgetState.call(this);
};
ol.source.Vector.prototype.setState = function(state) {
this.set('HL_state', state);
// listeners on 'change' will not trigger on 'change:HL_state'. Must issue a 'change' explicitly
this.changed();
};
String.prototype.hashCode = function() {
var hash = 0, i, chr;
if (this.length === 0) return hash;
for (i = 0; i < this.length; i++) {
chr = this.charCodeAt(i);
hash = ((hash << 5) - hash) + chr;
hash |= 0; // Convert to 32bit integer
}
return hash;
};
if (window.Proj4js) {
// add your projection definitions here
// definitions can be found at http://spatialreference.org/ref/epsg/{xxxx}/proj4js/
proj4.defs['OGC:CRS84'] = proj4.defs['EPSG:4326']
// add EPSG:4326 as coming from GML, to allow for geometry transforms performed by format.GML
proj4.defs['http://www.opengis.net/gml/srs/epsg.xml#4326'] = proj4.defs['EPSG:4326']
// warn : 31370 definition from spatialreference.org is wrong
proj4.defs("EPSG:31370", "+proj=lcc +lat_1=51.16666723333333 +lat_2=49.8333339 +lat_0=90 +lon_0=4.367486666666666 +x_0=150000.013 +y_0=5400088.438 +ellps=intl +towgs84=-106.868628,52.297783,-103.723893,0.336570,-0.456955,1.842183,-1.2747 +units=m +no_defs");
proj4.defs("EPSG:28992", "+proj=sterea +lat_0=52.15616055555555 +lon_0=5.38763888888889 +k=0.999908 +x_0=155000 +y_0=463000 +ellps=bessel +units=m +towgs84=565.2369,50.0087,465.658,-0.406857330322398,0.350732676542563,-1.8703473836068,4.0812 +no_defs <>");
proj4.defs("EPSG:3812", "+proj=lcc +lat_1=49.83333333333334 +lat_2=51.16666666666666 +lat_0=50.797815 +lon_0=4.359215833333333 +x_0=649328 +y_0=665262 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs");
}
// duplicate this code to avoid a dependency on internal class ol.<...>.Projection_
var createEPSG4326Proj = function(code, opt_axisOrientation) {
return new ol.proj.Projection({
code: code,
units: ol.proj.get('EPSG:4326').getUnits(),
extent: ol.proj.get('EPSG:4326').getExtent(),
axisOrientation: opt_axisOrientation,
global: true,
metersPerUnit: ol.proj.get('EPSG:4326').getMetersPerUnit(),
worldExtent: ol.proj.get('EPSG:4326').getWorldExtent()
})
}
// redefine GML EPSG:4326 with lon/lat axis order;
// Don't do that. Force usage of EPSG4326_LONLAT in format.GML instead
//ol.proj.addProjection(createEPSG4326Proj('http://www.opengis.net/gml/srs/epsg.xml#4326', 'enu'));
// Define a special projection with lon/lat axis order to be used in format.GML hack
ol.proj.addProjection(createEPSG4326Proj('EPSG:4326:LONLAT', 'enu'));
(function() {
// Establish the root object, `window` in the browser, or `global` on the server.
var root = this;
var OL_HELPERS = root.OL_HELPERS = {
// this is currently used only for geojson parsing
FEATURE_GEOM_PROP : '_HILATS_Geometry',
DEFAULT_STYLEMAP : {
default : [
new ol.style.Style({
stroke: new ol.style.Stroke({
color: 'white',
width: 4
})}),
new ol.style.Style({
stroke: new ol.style.Stroke({
color: '#3399CC',
width: 2.5
}),
image: new ol.style.Circle({
radius: 5,
stroke: new ol.style.Stroke({
color: '#3399CC',
width:1.5
}),
fill: new ol.style.Fill({
color: 'rgba(255,255,255,0.4)'
})
})
})],
highlight : [
new ol.style.Style({
stroke: new ol.style.Stroke({
color: 'white',
width: 4
})}),
new ol.style.Style({
stroke: new ol.style.Stroke({
color: '#2288FF',
width: 2.5
}),
image: new ol.style.Circle({
radius: 5,
stroke: new ol.style.Stroke({
color: 'blue',
width: 3
})
})
})],
selected : [
new ol.style.Style({
stroke: new ol.style.Stroke({
color: 'white',
width: 5
})}),
new ol.style.Style({
stroke: new ol.style.Stroke({
color: 'green',
width: 3
}),
fill: new ol.style.Fill({
color: 'rgba(255, 255, 255, 0.1)'
}),
image: new ol.style.Circle({
radius: 5,
fill: new ol.style.Fill({
color: 'rgba(255, 255, 255, 0.1)'
}),
stroke: new ol.style.Stroke({
color: 'green',
width: 3
})
})
}) ]
}
};
var $_ = _ // keep pointer to underscore, as '_' will may be overridden by a closure variable when down the stack
/* add LonLat 4326 definition as default - TODO: isn't this breaking support of certain services ?*/
/*
var EPSG4326_LONGURL = new ol.proj.Projection({
code: 'http://www.opengis.net/gml/srs/epsg.xml#4326',
axis: 'enu'
});
ol.proj.addEquivalentProjections([ol.proj.get('EPSG:4326'), EPSG4326_LONGURL]);
*/
var EPSG4326 = OL_HELPERS.EPSG4326 = ol.proj.get("EPSG:4326")
var EPSG4326_LONG = OL_HELPERS.EPSG4326_LONG = ol.proj.get('urn:ogc:def:crs:EPSG:6.6:4326')
var EPSG4326_LONLAT = OL_HELPERS.EPSG4326_LONLAT = createEPSG4326Proj('EPSG:4326', 'enu')
var EPSG4326_LATLON = OL_HELPERS.EPSG4326_LATLON = createEPSG4326Proj('EPSG:4326', 'neu')
var Mercator = OL_HELPERS.Mercator = ol.proj.get("EPSG:3857")
var WORLD_BBOX = OL_HELPERS.WORLD_BBOX = [-180, -90, 180, 90]
var WORLD_BBOX_MERCATOR = OL_HELPERS.WORLD_BBOX_MERCATOR = ol.proj.transformExtent(OL_HELPERS.WORLD_BBOX, OL_HELPERS.EPSG4326, OL_HELPERS.Mercator)
var MAX_FEATURES = 300
var isNumeric = function(n) {
return !isNaN(parseFloat(n)) && isFinite(n);
}
var unnamespace = function(str) {
if (!str)
return str;
var idx = str.indexOf(':');
return idx < 0 ? str : str.substring(idx+1);
}
// When possible, override decimal parsers, as some capabilities use commas as decimal separator
// (e.g. http://geoservices.wallonie.be/arcgis/services/EAU/ALEA_2016/MapServer/WMSServer)
var originalReadDecimal = ol.format && ol.format.XSD && ol.format.XSD.readDecimalString;
if (originalReadDecimal) {
ol.format.XSD.readDecimalString = function (string) {
if (string) {
string = string.replace(',', '.');
}
return originalReadDecimal(string);
};
}
var INCHES_PER_UNIT = {
'm': 39.37,
'degrees': 4374754
};
var DOTS_PER_INCH = 72;
OL_HELPERS.getScaleFromResolution = function(resolution, units, opt_round) {
var scale = INCHES_PER_UNIT[units] * DOTS_PER_INCH * resolution;
if (opt_round) {
scale = Math.round(scale);
}
return scale;
};
ol.Map.prototype.getScale = function(opt_round) {
return OL_HELPERS.getScaleFromResolution(this.getView().getResolution(), this.getView().getProjection().getUnits(), opt_round);
};
ol.Map.prototype.addLayerWithExtent = function (layer) {
this.addLayer(layer)
// fit to layer extent only if layer visible
if (layer.getVisible() && layer.getSource()) {
var _view = this.getView();
var zoomToExtent = function() {
var projectedBbox;
var wgs84bbox = layer.getSource().getFullExtent && layer.getSource().getFullExtent();
if (wgs84bbox) {
projectedBbox = ol.proj.transformExtent(wgs84bbox, OL_HELPERS.EPSG4326, _view.getProjection())
} else {
// is getExtent always in view projection? yes for vector sources
projectedBbox = layer.getSource().getExtent && layer.getSource().getExtent();
}
// sometimes the capabilities are wrong and the bbox is absent
if (projectedBbox &&
isNumeric(projectedBbox[0]) &&
isNumeric(projectedBbox[1]) &&
isNumeric(projectedBbox[2]) &&
isNumeric(projectedBbox[3]))
_view.fit(projectedBbox, {constrainResolution: false})
else {
console.warn("Adding layer : could not find extent to zoom to")
}
}
var loading = $.Deferred();
if (! layer.getSource().get('waitingOnFirstData'))
loading.resolve();
else {
var listenerKey = layer.getSource().on('change', function(e) {
if (layer.getSource().getState() == 'ready') {
ol.Observable.unByKey(listenerKey);
loading.resolve();
}
});
}
return loading.then(zoomToExtent)
}
}
/**
* Override loadFeatures to implement max features cap.
* Take into account return value of loader func and reload new batches of data when needed
*/
/*
ol.source.Vector.prototype.loadFeatures = function(
extent, resolution, projection) {
var loadedExtentsRtree = this.loadedExtentsRtree_;
var extentsToLoad = this.strategy_(extent, resolution);
var i, ii;
for (i = 0, ii = extentsToLoad.length; i < ii; ++i) {
var extentToLoad = extentsToLoad[i];
var alreadyLoaded = loadedExtentsRtree.forEachInExtent(extentToLoad,
function(object) {
// return true if new extent is contained in a fully loaded extent
// or if new extent contains a partially loaded extent
return (object.extentCovered && ol.extent.containsExtent(object.extent, extentToLoad)) ||
(!object.extentCovered && ol.extent.containsExtent(extentToLoad, object.extent));
});
if (!alreadyLoaded) {
// return value of loader is true if extent was partially loaded (due to max features cap)
var promise = this.loader_.call(this, extentToLoad, resolution, projection);
var insertExtentFn = function(extentCovered) {
loadedExtentsRtree.insert(extentToLoad, {extent: extentToLoad.slice(), extentCovered: extentCovered});
}
if (promise) {
promise.then(
function(extentPartiallyCovered) { insertExtentFn(!extentPartiallyCovered) },
function(err) { insertExtentFn(false) });
} else {
insertExtentFn(true)
}
}
}
};
*/
// Returns the WGS84 bbox
var getFTSourceExtent = function() {
var bbox = this.get('ftDescr') && this.get('ftDescr').wgs84bbox;
return bbox;
}
var getFT3SourceExtent = function() {
var bbox = this.get('ftDescr') && this.get('ftDescr').extent.bbox;
return bbox;
}
var getWMTSSourceExtent = function() {
var bbox = this.get('mlDescr') && this.get('mlDescr').WGS84BoundingBox;
return bbox;
}
var getWMSSourceExtent = function() {
//1.1.0 : LatLonBoundingBox
//1.3 : EX_GeographicBoundingBox
var bbox = this.get('mlDescr') && this.get('mlDescr').EX_GeographicBoundingBox;
return bbox;
}
var getArcGISVectorExtent = function() {
var bbox = this.get('arcgisDescr') && this.get('arcgisDescr').bounds;
return bbox;
}
var pendingEPSGRequests = {};
var searchEPSG = function(query) {
if (pendingEPSGRequests[query])
return pendingEPSGRequests[query];
var deferredResult = pendingEPSGRequests[query] = $.Deferred()
fetch('https://epsg.io/?format=json&q=' + query).then(function(response) {
return response.json();
}).then(function(json) {
var results = json['results'];
if (results && results.length > 0) {
for (var i = 0, ii = results.length; i < ii; i++) {
var result = results[i];
if (result) {
var code = result['code'], name = result['name'],
proj4def = result['proj4'], bbox = result['bbox'];
if (code && code.length > 0 && proj4def && proj4def.length > 0) {
var newProjCode = 'EPSG:' + code;
proj4.defs(newProjCode, proj4def);
var newProj = ol.proj.get(newProjCode);
deferredResult.resolve(newProj);
}
}
}
}
deferredResult.resolve(undefined); // resolve with an error ?
});
return deferredResult.then(function() {
delete pendingEPSGRequests[query]
});
}
OL_HELPERS.LoggingMap = function(options) {
ol.Map.call(this, options);
this.loadingObjects = []
this.errorDiv = options.errorDiv
if (this.errorDiv === undefined) {
this.errorDiv = $("<div style='color: #511e17; font-size: 12px; padding: 2px 3px; background-color: rgba(255, 235, 131, 0.80); display: none;'></div>")[0]
}
this.msgDiv = options.msgDiv
if (this.msgDiv === undefined) {
this.msgDiv = $("<div style='font-size: 12px; padding: 2px 3px; background-color: rgba(255,255,255,0.8); display: none;'></div>")[0]
}
this.loadingDiv = options.loadingDiv
if (this.loadingDiv === undefined) {
this.loadingDiv = $("<div class='loader' style='font-size: 10px; margin: 40px 40px; z-index: 50; position: absolute; top: 0px;'></div>")[0]
}
this.loadingListener = options.loadingListener
this.loadingDiv && this.getViewport().appendChild(this.loadingDiv);
var msgContainer = $("<div style='position: absolute; z-index: 50; left: 60px; top:10px;'></div>").appendTo(this.getViewport());
this.errorDiv && msgContainer.append(this.errorDiv);
this.msgDiv && msgContainer.append(this.msgDiv);
this.partiallyLoadedSources = [];
this.erroredSources = [];
this.on("change:partiallyLoaded", function() {
if (this.msgDiv) {
if (this.partiallyLoadedSources.length > 0) {
var _thisMap = this;
var msgDiv = $(this.msgDiv)
.text("More features to load ")
.append($("<button>Reload in current view</button>").click(function() {
_thisMap.partiallyLoadedSources.forEach(function(src) {
src.clear();
})
}))
_thisMap.partiallyLoadedSources.forEach(function(src) {
if (src.get('next_page')) {
msgDiv.append($("<button>Next page</button>").click(function() {
_thisMap.partiallyLoadedSources.forEach(function(src) {
src.nextPage();
})
}))
}
})
this.msgDiv.style.display = '';
} else {
this.msgDiv.style.display = 'none';
}
}
});
this.on("change:erroredSource", _.bind(this.updateErrorStatus, this));
this.on("change:errors", _.bind(this.updateErrorStatus, this));
this.updateLoadingStatus();
};
ol.inherits(OL_HELPERS.LoggingMap, ol.Map);
OL_HELPERS.LoggingMap.prototype.logError = function(err) {
if (!this.get('errors')) {
this.set('errors', [err]);
} else {
this.get('errors').push(err);
this.dispatchEvent("change:errors");
}
}
OL_HELPERS.LoggingMap.prototype.updateErrorStatus = function() {
if (this.errorDiv) {
var errors = this.get('errors');
var hasErrors = errors && errors.length > 0;
$(this.errorDiv).empty();
if (this.erroredSources.length <= 0 && !hasErrors) {
this.errorDiv.style.display = 'none';
}
else {
this.errorDiv.style.display = '';
if (this.erroredSources.length > 0) {
var _thisMap = this;
$(this.errorDiv)
.text("Layers in error - See console for details ")
.append($("<button>Retry</button>").click(function() {
_thisMap.erroredSources.forEach(function(src) {
src.setState(ol.source.State.READY);
src.clear();
})
}))
}
else if (hasErrors) {
var _this = this;
errors.forEach(function(err) {
$(_this.errorDiv).append($("<div></div>").text(err))
})
}
}
}
};
OL_HELPERS.LoggingMap.prototype.updateLoadingStatus = function() {
if (this.loadingObjects.length == 0) {
this.loadingDiv && (this.loadingDiv.style.display = 'none');
this.loadingListener && this.loadingListener(false);
} else {
this.loadingDiv && (this.loadingDiv.style.display = '');
this.loadingListener && this.loadingListener(true);
}
};
OL_HELPERS.LoggingMap.prototype.addLayer = function(layer) {
ol.Map.prototype.addLayer.apply(this, arguments)
var _this = this
var layerStarts = function(event) {
var loadingObj = event.tile || event.target || layer.getSource();
if (event.tile) {
layer.getSource().loadingTiles = layer.getSource().loadingTiles || [];
layer.getSource().loadingTiles.push(event.tile);
}
if (layer.getSource().get('HL_state') != ol.source.State.LOADING)
layer.getSource().set('HL_state', ol.source.State.LOADING);
if (_this.loadingObjects.indexOf(loadingObj) < 0) {
_this.loadingObjects.push(loadingObj)
}
_this.updateLoadingStatus();
}
var layerEnds = function(event) {
var loadingObj = event.tile || event.target || layer.getSource();
if (event.tile && layer.getSource().loadingTiles) {
var tileIdx = layer.getSource().loadingTiles.indexOf(event.tile);
tileIdx >= 0 && layer.getSource().loadingTiles.splice(tileIdx, 1);
}
if (!layer.getSource().loadingTiles || layer.getSource().loadingTiles.length == 0) {
if (layer.getSource().get('HL_state') != ol.source.State.READY)
layer.getSource().set('HL_state', ol.source.State.READY);
}
var es_idx = _this.erroredSources.indexOf(loadingObj);
if (this.getState() == ol.source.State.ERROR) {
if (es_idx == -1)
_this.erroredSources.push(loadingObj);
_this.dispatchEvent("change:erroredSource");
} else {
if (es_idx >= 0) {
_this.erroredSources.splice(es_idx, 1);
_this.dispatchEvent("change:erroredSource")
}
}
var pls_idx = _this.partiallyLoadedSources.indexOf(loadingObj);
if (loadingObj.get && loadingObj.get('partial_load')) {
if (pls_idx == -1) {
_this.partiallyLoadedSources.push(loadingObj);
_this.dispatchEvent("change:partiallyLoaded");
}
} else {
if (pls_idx >= 0) {
_this.partiallyLoadedSources.splice(pls_idx, 1);
_this.dispatchEvent("change:partiallyLoaded")
}
}
var idx = _this.loadingObjects.indexOf(loadingObj)
if (idx >= 0) {
_this.loadingObjects.splice(idx, 1)
}
setTimeout(function() {
_this.updateLoadingStatus()
}, 100);
}
//TODO do something special for errors ?
var layerError = layerEnds
layer.getSource().on('change', function(e) {
if (layer.getSource().getState() == ol.source.State.LOADING) {
layerStarts.call(this, e)
} else if (layer.getSource().getState() == ol.source.State.READY)
{
layerEnds.call(this, e)
} else if (layer.getSource().getState() == ol.source.State.ERROR)
{
layerError.call(this, e)
}
});
layer.on('change:visible', function(e) {
var pls_idx = _this.partiallyLoadedSources.indexOf(this.getSource());
if (this.getVisible() && this.getSource().get('partial_load')) {
_this.partiallyLoadedSources.push(this.getSource());
_this.dispatchEvent("change:partiallyLoaded");
} else if (!this.getVisible() && pls_idx >= 0) {
_this.partiallyLoadedSources.splice(pls_idx, 1);
_this.dispatchEvent("change:partiallyLoaded")
}
var es_idx = _this.erroredSources.indexOf(this.getSource());
if (this.getVisible() && this.getSource().getState() == ol.source.State.ERROR) {
_this.erroredSources.push(this.getSource());
_this.dispatchEvent("change:erroredSource");
} else if (!this.getVisible() && es_idx >= 0) {
_this.erroredSources.splice(es_idx, 1);
_this.dispatchEvent("change:erroredSource")
}
});
layer.getSource().on('tileloadstart', layerStarts);
layer.getSource().on('tileloadend', layerEnds);
layer.getSource().on('tileloaderror', layerError);
layer.getSource().on('imageloadstart', layerStarts);
layer.getSource().on('imageloadend', layerEnds);
layer.getSource().on('imageloaderror', layerError);
};
/**
* Options : {
* className,
* target,
* render : () => {render all features} ,
* renderFeature : (feature, $elem) => {render feature in $elem}
* }
* @param opt_options
* @constructor
*/
OL_HELPERS.FeatureDetailsControl = function(opt_options) {
var options = opt_options ? opt_options : {};
var element = document.createElement('DIV');
element.className = options.className !== undefined ? options.className : 'ol-feature-details';
var render = options.render ?
options.render : OL_HELPERS.FeatureDetailsControl.render;
ol.control.Control.call(this, {
element: element,
render: render,
target: options.target
});
this.renderFeature = options.renderFeature ?
options.renderFeature : OL_HELPERS.FeatureDetailsControl.renderFeature;
this.on('change:'+OL_HELPERS.FeatureDetailsControl.PROPERTIES.SELECTED_FEATURES, this.handleFeaturesChanged);
};
ol.inherits(OL_HELPERS.FeatureDetailsControl, ol.control.Control);
OL_HELPERS.FeatureDetailsControl.prototype.handleFeaturesChanged = function() {
this.render();
};
OL_HELPERS.FeatureDetailsControl.prototype.setFeatures = function(features) {
if (features instanceof ol.Collection)
features = features.getArray();
this.set(OL_HELPERS.FeatureDetailsControl.PROPERTIES.SELECTED_FEATURES, features || []);
};
/**
* Update the mouseposition element.
* @param {ol.MapEvent} mapEvent Map event.
* @this {ol.control.MousePosition}
* @api
*/
OL_HELPERS.FeatureDetailsControl.render = function() {
var htmlContent;
var selectedFeatures = this.get(OL_HELPERS.FeatureDetailsControl.PROPERTIES.SELECTED_FEATURES) || [];
var container = $(this.element)
var _thisControl = this;
if (selectedFeatures && selectedFeatures.length > 0) {
var detailsArr = selectedFeatures.map(function(f) {
var $details = $("<div class='featureDetails'></div>")
.prop('feature', f)
_thisControl.renderFeature(f, $details)
return $details;
})
container.empty().append(detailsArr);
} else {
container.empty();
}
};
var urlRegex = /[-a-zA-Z0-9@:%_\+.~#?&//=]{2,256}\.[a-z]{2,4}\b(\/[-a-zA-Z0-9@:%_\+.~#?&//=]*)?/gi
OL_HELPERS.FeatureDetailsControl.renderFeature = function(feature, container) {
var htmlContent;
if (feature) {
var layerTitle = feature && feature.layer && feature.layer.get('title')
htmlContent = "<div class='name'>" + layerTitle +" : <b>"+ (feature.get('name') || feature.getId()) + "</b></div>";
htmlContent += "<div class='content'><table>";
var geomName = feature.getGeometryName();
feature.getKeys().forEach(function(prop) {
if (prop != geomName) {
var value = feature.get(prop);
if ((typeof value == 'string') && value.match(urlRegex))
value = "<a href='"+value+"' target='_blank'>"+value+"</a>";
htmlContent += "<tr><td class='propKey'>" + prop + "</td><td class='propValue'>" + value + "</td></tr></div>"
}
})
htmlContent += "</table></div>";
$(container).append($(htmlContent));
} else {
// return undefined
}
};
OL_HELPERS.FeatureDetailsControl.PROPERTIES = {
SELECTED_FEATURES : "selectedFeatures"
};
OL_HELPERS.FeatureInfoOverlay = function(options) {
ol.Overlay.call(this, options);
var popupContent = $(this.getElement()).find('.popupContent');
popupContent.hover(function() {
popupContent.prop('isHovered', true)
}, function() {
popupContent.prop('isHovered', false)
})
this.showDetails = options.showDetails;
this.filter = options.filter;
this.renderFeaturePopup = options.renderFeaturePopup || function(features, displayDetails) {
var htmlContent;
if (displayDetails) {
var feature = features[0];
var layerTitle = feature && feature.layer && feature.layer.get('title')
htmlContent = "<div class='name'>" + layerTitle +" : <b>"+ (feature.get('name') || feature.getId()) + "</b></div>";
htmlContent += "<table>";
feature.getKeys().forEach(function(prop) {
htmlContent += "<tr><td class='propKey'>" + prop + "</td><td class='propValue'>" + feature.get(prop) + "</td></tr></div>"
})
htmlContent += "</table>"
} else {
htmlContent = "";
features.forEach(function(feature) {
var layerTitle = feature && feature.layer && feature.layer.get('title')
htmlContent += "<div class='name'>" + layerTitle +" : <b>"+ (feature.get('name') || feature.getId()) + "</b></div>";
})
}
return htmlContent;
}
this.computePosition = options.computePosition || function(features, evt) {
// default positioning : take current cursor pos
return evt.coordinate;
}
this.displayedFeatures = [];
this.onDisplayedFeaturesChange = options.onDisplayedFeaturesChange;
this.on('change:map', function(evt) {
this.HL_handleMapChanged();
})
};
ol.inherits(OL_HELPERS.FeatureInfoOverlay, ol.Overlay);
OL_HELPERS.FeatureInfoOverlay.prototype.setFeatures = function(features, displayDetails) {
if (this.onDisplayedFeaturesChange)
this.onDisplayedFeaturesChange(this.displayedFeatures, features);
this.displayedFeatures = features;
var popupContent = $(this.getElement()).find('.popupContent');
if (features.length == 0) {
// if features are no longer hovered, but info element still is, do not hide info
if (!popupContent.prop("isHovered"))
this.setPosition(undefined);
return;
}
var htmlContent = this.renderFeaturePopup(features, displayDetails);
// do a clean detach to make sure the same element can be re-appended while keeping its listeners
this.appendedElement && $(this.appendedElement).detach();
if (typeof htmlContent === 'string') {
popupContent.html(htmlContent);
} else {
popupContent.empty().append(this.appendedElement = htmlContent);
}
}
OL_HELPERS.FeatureInfoOverlay.prototype.HL_handleMapChanged = function() {
var map = this.getMap();
var _this = this;
if (map) {
map.on('pointermove', function(evt) {
var changed = false;
var features = [];
map.forEachFeatureAtPixel(evt.pixel, function(feature, layer) {
if (layer != null) { // null layer is from unmanaged layers, presumably form Select interaction
if (feature && (!_this.filter || _this.filter(feature, layer))) // sometimes feature is undefined (?!)
features.push(feature);
feature.layer = layer
if (_this.displayedFeatures.indexOf(feature) < 0) {
changed = true
}
}
});
changed = !$_.isEqual(features, _this.displayedFeatures)
if (changed) {
if (_this.displayDetailsTimeout)
clearTimeout(_this.displayDetailsTimeout)
_this.setFeatures(features);
if (_this.showDetails)
_this.displayDetailsTimeout = setTimeout(function() {_this.setFeatures(_this.displayedFeatures, true);}, 500);
}
if (_this.displayedFeatures.length > 0) {
_this.setPosition(_this.computePosition(features, evt));
}
});
}
};
/**
* Parse a comma-separated set of KVP, typically for URL query or fragments
* @param url
*/
var parseKVP = OL_HELPERS.parseKVP = function (kvpString) {
var kvps = (kvpString && kvpString.split("&")) || []
var kvpMap = {}
kvps.forEach(function(val, idx) {
var kv = val.split('=')
kvpMap[kv[0].toLowerCase()] = kv[1]
})
return kvpMap
}
var kvp2string = OL_HELPERS.kvp2string = function (map) {
var result = ""
for (var key in map) {
result += (result.length>0?'&':'') + key + "=" + map[key]
}
return result
}
/**
* Parse a URL into path, query KVP , hash KVP
* @param url
*/
OL_HELPERS.parseURL = function (url) {
var parts = url.split('?', 2)
var path = parts[0]
var query = parts.length > 1 && parts[1]
var hash
if (!query) {
parts = path.split('#', 2)
path = parts[0]
hash = parts.length > 1 && parts[1]
} else {
parts = query.split('#', 2)
query = parts[0]
hash = parts.length > 1 && parts[1]
}
return {
path: path,
query: parseKVP(query),
hash: parseKVP(hash)
}
}
var parseArcGisDescriptor = function (url, callback, failCallback) {
var params = {f: "pjson"};
fetch(url + (url.indexOf('?')>=0?'&':'?') + kvp2string(params),
{method:'GET', credentials: 'include'}
).then(
function(response) {
return response.text();
}
).then(
function(text) {
var descriptor = JSON.parse(text)
callback(descriptor)
}
).catch(failCallback ||
function(ex) {
console.warn("Trouble getting ArcGIS descriptor");
console.warn(ex);
}
)
}
var fetchWFSCapas = function (url, callback, failCallback) {
var params = {
SERVICE: "WFS",
REQUEST: "GetCapabilities"
}
fetch(url + (url.indexOf('?')>=0?'&':'?') + kvp2string(params),
{method:'GET', credentials: 'include'}
).then(
function(response) {
return response.text();
}
).then(
function(text) {
var capabilities = OL_HELPERS.parseWfsCapabilities($.parseXML(text))
callback(capabilities)
}
).catch(failCallback || function(ex) {
console.warn("Trouble getting capabilities doc");
console.warn(ex);
})
}
var fetchWFSFeatureTypeDescr = function (url, ftName, ver, callback, failCallback) {
var params = {
SERVICE: "WFS",
REQUEST: "DescribeFeatureType",
TYPENAME: ftName,
VERSION: ver
}
fetch(url + (url.indexOf('?')>=0?'&':'?') + kvp2string(params),
{method:'GET', credentials: 'include'}
).then(
function(response) {
return response.text();
}
).then(
function(text) {
var capabilities = $.parseXML(text);
callback(OL_HELPERS.parseFeatureTypeDescription(capabilities))
}
).catch(failCallback || function(ex) {
console.warn("Trouble getting FT description doc");
console.warn(ex);
})
}
var parseWMSCapas = function (url, version, callback, failCallback) {
if (version === undefined) {
// try to force 1.3.0
return parseWMSCapas(url, "1.3.0", callback, failCallback)
.catch(function(err) {
// if it fails, let the server choose the version
return parseWMSCapas(url, "auto", callback, failCallback)
})
} else {
var parser = new ol.format.WMSCapabilities();
var params = {
SERVICE: "WMS",
REQUEST: "GetCapabilities"
}
if (version != 'auto' && version)
params.VERSION = version;
var url = url + (url.indexOf('?')>=0?'&':'?') + kvp2string(params);
return fetch(url,
{method:'GET', credentials: 'include'}
).then(
function(response) {
return response.text();
}
).then(_.bind(parser.read, parser)
).then(callback)
.catch(function(err) {
var msg = "Failed to read WMS capabilities";
console.warn("Failed to read capabilities from "+url);
console.warn(err);