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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| import togeojson from 'togeojson'; | ||
| import Fetcher from '../Provider/Fetcher'; | ||
| import Extent from '../Core/Geographic/Extent'; | ||
|
|
||
| function getExtentFromGpxFile(file) { | ||
| const bound = file.getElementsByTagName('bounds')[0]; | ||
| if (bound) { | ||
| const west = bound.getAttribute('minlon'); | ||
| const east = bound.getAttribute('maxlon'); | ||
| const south = bound.getAttribute('minlat'); | ||
| const north = bound.getAttribute('maxlat'); | ||
| return new Extent('EPSG:4326', west, east, south, north); | ||
| } | ||
| return new Extent('EPSG:4326', -180, 180, -90, 90); | ||
| } | ||
|
|
||
| class geoFileSource { | ||
| constructor(source) { | ||
| if (!source.url) { | ||
| throw new Error('source.url is required'); | ||
| } | ||
|
|
||
| this.protocol = 'file'; | ||
|
|
||
| this.url = source.url; | ||
|
|
||
| this.tileMatrixSet = 'WGS84G'; | ||
|
|
||
| // KML and GPX specifications all says that they should be in | ||
| // EPSG:4326. We still support reprojection for them through this | ||
| // configuration option | ||
| this.projection = source.projection || 'EPSG:4326'; | ||
|
|
||
| if (source.extent && !(source.extent instanceof Extent)) { | ||
| this.extent = new Extent(this.projection, source.extent); | ||
| } | ||
|
|
||
| if (!source.zoom) { | ||
| this.zoom = { min: 5, max: 21 }; | ||
| } | ||
|
|
||
| this.networkOptions = source.networkOptions || { crossOrigin: 'anonymous' }; | ||
|
|
||
| this.whenReady = Fetcher.text(this.url, source.networkOptions).then((text) => { | ||
| let geojson; | ||
| const trimmedText = text.trim(); | ||
| // We test the start of the string to choose a parser | ||
| if (trimmedText.startsWith('<')) { | ||
| // if it's an xml file, then it can be kml or gpx | ||
| const parser = new DOMParser(); | ||
| const file = parser.parseFromString(text, 'application/xml'); | ||
| if (file.documentElement.tagName.toLowerCase() === 'kml') { | ||
| geojson = togeojson.kml(file); | ||
| } else if (file.documentElement.tagName.toLowerCase() === 'gpx') { | ||
| geojson = togeojson.gpx(file); | ||
| geojson.style.stroke = geojson.style.stroke || 'red'; | ||
| // this.extent = source.extent.intersect(getExtentFromGpxFile(file)); // .as(layer.extent.crs())); | ||
| this.extent = getExtentFromGpxFile(file); // .as(layer.extent.crs())); | ||
| } else if (file.documentElement.tagName.toLowerCase() === 'parsererror') { | ||
| throw new Error('Error parsing XML document'); | ||
| } else { | ||
| throw new Error('Unsupported xml file, only valid KML and GPX are supported, but no <gpx> or <kml> tag found.', | ||
| file); | ||
| } | ||
| } else if (trimmedText.startsWith('{') || trimmedText.startsWith('[')) { | ||
| geojson = JSON.parse(text); | ||
| if (geojson.type !== 'Feature' && geojson.type !== 'FeatureCollection') { | ||
| throw new Error('This json is not a GeoJSON'); | ||
| } | ||
| } else { | ||
| throw new Error('Unsupported file: only well-formed KML, GPX or GeoJSON are supported'); | ||
| } | ||
|
|
||
| this.geojson = geojson; | ||
| }); | ||
| } | ||
|
|
||
| extentInsideLimit(extent, target, parent, pitch, zoom) { | ||
| const result = zoom >= this.zoom.min && zoom <= this.zoom.max && ((this.extent !== undefined && this.extent.intersectsExtent(extent[0])) || this.extent === undefined); | ||
| return result; | ||
| } | ||
| } | ||
|
|
||
| export default geoFileSource; |