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JS MapLibre Adapter: autodetect minzoom/maxzoom, clean up hacky loading syntax [#48]

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Brandon Liu
2022-10-14 00:08:08 +08:00
parent b1c7cf59a3
commit 9f6941e969
1 changed files with 62 additions and 32 deletions
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94
js/adapters.ts
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@@ -62,38 +62,68 @@ export class Protocol {
} }
tile = (params: any, callback: any) => { tile = (params: any, callback: any) => {
const re = new RegExp(/pmtiles:\/\/(.+)\/(\d+)\/(\d+)\/(\d+)/); if (params.type == "json") {
const result = params.url.match(re); const pmtiles_url = params.url.substr(10);
const pmtiles_url = result[1]; let instance = this.tiles.get(pmtiles_url);
if (!instance) {
instance = new PMTiles(pmtiles_url);
this.tiles.set(pmtiles_url, instance);
}
let instance = this.tiles.get(pmtiles_url); instance.getHeader().then((h) => {
if (!instance) { const tilejson = {
instance = new PMTiles(pmtiles_url); tiles: [params.url + "/{z}/{x}/{y}"],
this.tiles.set(pmtiles_url, instance); minzoom: h.minZoom,
maxzoom: h.maxZoom,
};
callback(null, tilejson, null, null);
});
return {
cancel: () => {},
};
} else {
const re = new RegExp(/pmtiles:\/\/(.+)\/(\d+)\/(\d+)\/(\d+)/);
const result = params.url.match(re);
const pmtiles_url = result[1];
let instance = this.tiles.get(pmtiles_url);
if (!instance) {
instance = new PMTiles(pmtiles_url);
this.tiles.set(pmtiles_url, instance);
}
const z = result[2];
const x = result[3];
const y = result[4];
const controller = new AbortController();
const signal = controller.signal;
let cancel = () => {
controller.abort();
};
instance
.getZxy(+z, +x, +y, signal)
.then((resp) => {
if (resp) {
callback(
null,
new Uint8Array(resp.data),
resp.cacheControl,
resp.expires
);
} else {
callback(null, new Uint8Array(), null, null);
}
})
.catch((e) => {
if (e.name !== "AbortError") {
throw e;
}
});
return {
cancel: cancel,
};
} }
const z = result[2];
const x = result[3];
const y = result[4];
const controller = new AbortController();
const signal = controller.signal;
let cancel = () => {
controller.abort();
};
instance.getZxy(+z, +x, +y, signal).then((resp) => {
if (resp) {
callback(null, new Uint8Array(resp.data), resp.cacheControl, resp.expires);
} else {
callback(null, new Uint8Array(), null, null);
}
}).catch((e) => {
if (e.name !== "AbortError") {
throw e;
}
});
return {
cancel: cancel
};
}; };
} }