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Optimize geojsonsource: do not calculate all tiles when unneeded

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This commit is contained in:
Pieter Vander Vennet 2021-07-27 15:06:15 +02:00
parent 5d4e98dcf9
commit 4fd233e557
1 changed files with 47 additions and 43 deletions
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26
Logic/FeatureSource/GeoJsonSource.ts
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@ -50,7 +50,7 @@ export default class GeoJsonSource implements FeatureSource {
* @param locationControl
* @constructor
*/
public static ConstructMultiSource(flayers: { isDisplayed: UIEventSource<boolean>, layerDef: LayerConfig }[], locationControl: UIEventSource<Loc>): GeoJsonSource[] {
public static ConstructMultiSource(flayers: { isDisplayed: UIEventSource<boolean>, layerDef: LayerConfig }[], locationControl: UIEventSource<Loc>): FeatureSource[] {
const flayersPerSource = new Map<string, { isDisplayed: UIEventSource<boolean>, layerDef: LayerConfig }[]>();
for (const flayer of flayers) {
@ -65,7 +65,7 @@ export default class GeoJsonSource implements FeatureSource {
flayersPerSource.get(url).push(flayer)
}
const sources: GeoJsonSource[] = []
const sources: FeatureSource[] = []
flayersPerSource.forEach((flayers, key) => {
if (flayers.length == 1) {
@ -112,7 +112,19 @@ export default class GeoJsonSource implements FeatureSource {
}
const neededTiles = locationControl.map(
_ => {
location => {
if (!flayer.isDisplayed.data) {
// No need to download! - the layer is disabled
return undefined;
}
if (location.zoom < flayer.layerDef.minzoom ||
location.zoom > flayer.layerDef.maxzoom) {
// No need to download! - the layer is disabled
console.log("Not loading layers for " + url, "zoom" + location.zoom, " not between", flayer.layerDef.minzoom, "and", flayer.layerDef.maxzoom)
return undefined;
}
// Yup, this is cheating to just get the bounds here
const bounds = State.state.leafletMap.data.getBounds()
const tileRange = Utils.TileRangeBetween(zoomLevel, bounds.getNorth(), bounds.getEast(), bounds.getSouth(), bounds.getWest())
@ -126,14 +138,6 @@ export default class GeoJsonSource implements FeatureSource {
if (needed === undefined) {
return;
}
if (!flayer.isDisplayed.data) {
// No need to download! - the layer is disabled
return;
}
if (locationControl.data.zoom < flayer.layerDef.minzoom) {
return;
}
needed.forEach(neededTile => {
if (loadedTiles.has(neededTile)) {