mirror of
https://github.com/protomaps/PMTiles.git
synced 2026-02-04 10:51:07 +00:00
re-prettier pmtiles.ts; add prettier task
This commit is contained in:
Brandon Liu
@@ -15,7 +15,8 @@
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"build-tsc": "tsc --declaration --outdir dist",
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"build": "npm run build-iife && npm run build-esm && npm run build-tsc",
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"test": "node -r esbuild-runner/register pmtiles.test.ts",
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"tsc": "tsc --noEmit --watch"
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"tsc": "tsc --noEmit --watch",
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"prettier": "prettier --write pmtiles.ts"
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},
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"homepage": "https://github.com/protomaps/pmtiles",
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"author": "Brandon Liu",
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740
js/pmtiles.ts
740
js/pmtiles.ts
@@ -1,476 +1,460 @@
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declare var L: any;
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export const shift = (n: number, shift: number) => {
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return n * Math.pow(2, shift);
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return n * Math.pow(2, shift);
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};
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export const unshift = (n: number, shift: number) => {
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return Math.floor(n / Math.pow(2, shift));
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return Math.floor(n / Math.pow(2, shift));
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};
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export const getUint24 = (view: DataView, pos: number) => {
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return shift(view.getUint16(pos + 1, true), 8) + view.getUint8(pos);
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return shift(view.getUint16(pos + 1, true), 8) + view.getUint8(pos);
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};
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export const getUint48 = (view: DataView, pos: number) => {
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return shift(view.getUint32(pos + 2, true), 16) + view.getUint16(pos, true);
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return shift(view.getUint32(pos + 2, true), 16) + view.getUint16(pos, true);
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};
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const compare = (
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tz: number,
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tx: number,
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ty: number,
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view: DataView,
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i: number
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tz: number,
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tx: number,
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ty: number,
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view: DataView,
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i: number
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) => {
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if (tz != view.getUint8(i)) return tz - view.getUint8(i);
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var x = getUint24(view, i + 1);
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if (tx != x) return tx - x;
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var y = getUint24(view, i + 4);
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if (ty != y) return ty - y;
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return 0;
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if (tz != view.getUint8(i)) return tz - view.getUint8(i);
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var x = getUint24(view, i + 1);
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if (tx != x) return tx - x;
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var y = getUint24(view, i + 4);
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if (ty != y) return ty - y;
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return 0;
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};
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export const queryLeafdir = (
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view: DataView,
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z: number,
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x: number,
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y: number
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view: DataView,
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z: number,
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x: number,
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y: number
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): Entry | null => {
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let offset_len = queryView(view, z | 0x80, x, y);
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if (offset_len) {
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return {
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z: z,
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x: x,
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y: y,
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offset: offset_len[0],
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length: offset_len[1],
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is_dir: true,
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};
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}
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return null;
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let offset_len = queryView(view, z | 0x80, x, y);
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if (offset_len) {
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return {
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z: z,
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x: x,
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y: y,
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offset: offset_len[0],
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length: offset_len[1],
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is_dir: true,
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};
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}
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return null;
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};
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export const queryTile = (view: DataView, z: number, x: number, y: number) => {
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let offset_len = queryView(view, z, x, y);
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if (offset_len) {
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return {
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z: z,
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x: x,
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y: y,
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offset: offset_len[0],
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length: offset_len[1],
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is_dir: false,
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};
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}
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return null;
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let offset_len = queryView(view, z, x, y);
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if (offset_len) {
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return {
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z: z,
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x: x,
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y: y,
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offset: offset_len[0],
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length: offset_len[1],
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is_dir: false,
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};
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}
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return null;
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};
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const queryView = (
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view: DataView,
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z: number,
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x: number,
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y: number
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view: DataView,
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z: number,
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x: number,
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y: number
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): [number, number] | null => {
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var m = 0;
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var n = view.byteLength / 17 - 1;
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while (m <= n) {
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var k = (n + m) >> 1;
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var cmp = compare(z, x, y, view, k * 17);
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if (cmp > 0) {
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m = k + 1;
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} else if (cmp < 0) {
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n = k - 1;
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} else {
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return [
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getUint48(view, k * 17 + 7),
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view.getUint32(k * 17 + 13, true),
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];
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}
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}
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return null;
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var m = 0;
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var n = view.byteLength / 17 - 1;
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while (m <= n) {
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var k = (n + m) >> 1;
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var cmp = compare(z, x, y, view, k * 17);
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if (cmp > 0) {
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m = k + 1;
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} else if (cmp < 0) {
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n = k - 1;
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} else {
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return [getUint48(view, k * 17 + 7), view.getUint32(k * 17 + 13, true)];
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}
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}
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return null;
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};
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const entrySort = (a: Entry, b: Entry): number => {
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if (a.is_dir && !b.is_dir) {
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return 1;
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}
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if (!a.is_dir && b.is_dir) {
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return -1;
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}
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if (a.z !== b.z) {
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return a.z - b.z;
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}
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if (a.x !== b.x) {
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return a.x - b.x;
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}
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return a.y - b.y;
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if (a.is_dir && !b.is_dir) {
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return 1;
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}
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if (!a.is_dir && b.is_dir) {
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return -1;
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}
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if (a.z !== b.z) {
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return a.z - b.z;
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}
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if (a.x !== b.x) {
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return a.x - b.x;
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}
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return a.y - b.y;
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};
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export const parseEntry = (dataview: DataView, i: number): Entry => {
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var z_raw = dataview.getUint8(i * 17);
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var z = z_raw & 127;
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return {
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z: z,
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x: getUint24(dataview, i * 17 + 1),
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y: getUint24(dataview, i * 17 + 4),
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offset: getUint48(dataview, i * 17 + 7),
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length: dataview.getUint32(i * 17 + 13, true),
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is_dir: z_raw >> 7 === 1,
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};
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var z_raw = dataview.getUint8(i * 17);
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var z = z_raw & 127;
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return {
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z: z,
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x: getUint24(dataview, i * 17 + 1),
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y: getUint24(dataview, i * 17 + 4),
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offset: getUint48(dataview, i * 17 + 7),
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length: dataview.getUint32(i * 17 + 13, true),
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is_dir: z_raw >> 7 === 1,
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};
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};
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export const sortDir = (dataview: DataView): ArrayBuffer => {
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let entries: Entry[] = [];
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for (var i = 0; i < dataview.byteLength / 17; i++) {
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entries.push(parseEntry(dataview, i));
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}
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return createDirectory(entries);
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let entries: Entry[] = [];
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for (var i = 0; i < dataview.byteLength / 17; i++) {
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entries.push(parseEntry(dataview, i));
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}
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return createDirectory(entries);
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};
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export const createDirectory = (entries: Entry[]): ArrayBuffer => {
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entries.sort(entrySort);
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entries.sort(entrySort);
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let buffer = new ArrayBuffer(17 * entries.length);
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let arr = new Uint8Array(buffer);
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for (var i = 0; i < entries.length; i++) {
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var entry = entries[i];
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var z = entry.z;
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if (entry.is_dir) z = z | 0x80;
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arr[i * 17] = z;
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let buffer = new ArrayBuffer(17 * entries.length);
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let arr = new Uint8Array(buffer);
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for (var i = 0; i < entries.length; i++) {
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var entry = entries[i];
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var z = entry.z;
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if (entry.is_dir) z = z | 0x80;
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arr[i * 17] = z;
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arr[i * 17 + 1] = entry.x & 0xff;
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arr[i * 17 + 2] = (entry.x >> 8) & 0xff;
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arr[i * 17 + 3] = (entry.x >> 16) & 0xff;
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arr[i * 17 + 1] = entry.x & 0xff;
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arr[i * 17 + 2] = (entry.x >> 8) & 0xff;
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arr[i * 17 + 3] = (entry.x >> 16) & 0xff;
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arr[i * 17 + 4] = entry.y & 0xff;
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arr[i * 17 + 5] = (entry.y >> 8) & 0xff;
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arr[i * 17 + 6] = (entry.y >> 16) & 0xff;
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arr[i * 17 + 4] = entry.y & 0xff;
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arr[i * 17 + 5] = (entry.y >> 8) & 0xff;
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arr[i * 17 + 6] = (entry.y >> 16) & 0xff;
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arr[i * 17 + 7] = entry.offset & 0xff;
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arr[i * 17 + 8] = unshift(entry.offset, 8) & 0xff;
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arr[i * 17 + 9] = unshift(entry.offset, 16) & 0xff;
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arr[i * 17 + 10] = unshift(entry.offset, 24) & 0xff;
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arr[i * 17 + 11] = unshift(entry.offset, 32) & 0xff;
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arr[i * 17 + 12] = unshift(entry.offset, 48) & 0xff;
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arr[i * 17 + 7] = entry.offset & 0xff;
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arr[i * 17 + 8] = unshift(entry.offset, 8) & 0xff;
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||||
arr[i * 17 + 9] = unshift(entry.offset, 16) & 0xff;
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||||
arr[i * 17 + 10] = unshift(entry.offset, 24) & 0xff;
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||||
arr[i * 17 + 11] = unshift(entry.offset, 32) & 0xff;
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arr[i * 17 + 12] = unshift(entry.offset, 48) & 0xff;
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||||
|
||||
arr[i * 17 + 13] = entry.length & 0xff;
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||||
arr[i * 17 + 14] = (entry.length >> 8) & 0xff;
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arr[i * 17 + 15] = (entry.length >> 16) & 0xff;
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arr[i * 17 + 16] = (entry.length >> 24) & 0xff;
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}
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return buffer;
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arr[i * 17 + 13] = entry.length & 0xff;
|
||||
arr[i * 17 + 14] = (entry.length >> 8) & 0xff;
|
||||
arr[i * 17 + 15] = (entry.length >> 16) & 0xff;
|
||||
arr[i * 17 + 16] = (entry.length >> 24) & 0xff;
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||||
}
|
||||
return buffer;
|
||||
};
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||||
|
||||
interface Zxy {
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||||
z: number;
|
||||
x: number;
|
||||
y: number;
|
||||
z: number;
|
||||
x: number;
|
||||
y: number;
|
||||
}
|
||||
|
||||
// TODO: handle different leaf levels
|
||||
export const deriveLeaf = (tile: Zxy): Zxy => {
|
||||
let z7_tile_diff = tile.z - 7;
|
||||
let z7_x = Math.trunc(tile.x / (1 << z7_tile_diff));
|
||||
let z7_y = Math.trunc(tile.y / (1 << z7_tile_diff));
|
||||
return { z: 7, x: z7_x, y: z7_y };
|
||||
let z7_tile_diff = tile.z - 7;
|
||||
let z7_x = Math.trunc(tile.x / (1 << z7_tile_diff));
|
||||
let z7_y = Math.trunc(tile.y / (1 << z7_tile_diff));
|
||||
return { z: 7, x: z7_x, y: z7_y };
|
||||
};
|
||||
|
||||
interface Header {
|
||||
version: number;
|
||||
json_size: number;
|
||||
root_entries: number;
|
||||
version: number;
|
||||
json_size: number;
|
||||
root_entries: number;
|
||||
}
|
||||
|
||||
interface Root {
|
||||
header: Header;
|
||||
buffer: ArrayBuffer;
|
||||
dir: DataView;
|
||||
// etag: string | null;
|
||||
header: Header;
|
||||
buffer: ArrayBuffer;
|
||||
dir: DataView;
|
||||
// etag: string | null;
|
||||
}
|
||||
|
||||
export interface Entry {
|
||||
z: number;
|
||||
x: number;
|
||||
y: number;
|
||||
offset: number;
|
||||
length: number;
|
||||
is_dir: boolean;
|
||||
z: number;
|
||||
x: number;
|
||||
y: number;
|
||||
offset: number;
|
||||
length: number;
|
||||
is_dir: boolean;
|
||||
}
|
||||
|
||||
interface CachedLeaf {
|
||||
lastUsed: number;
|
||||
buffer: Promise<ArrayBuffer>;
|
||||
lastUsed: number;
|
||||
buffer: Promise<ArrayBuffer>;
|
||||
}
|
||||
|
||||
export const parseHeader = (dataview: DataView): Header => {
|
||||
var magic = dataview.getUint16(0, true);
|
||||
if (magic !== 19792) {
|
||||
throw new Error('File header does not begin with "PM"');
|
||||
}
|
||||
var version = dataview.getUint16(2, true);
|
||||
var json_size = dataview.getUint32(4, true);
|
||||
var root_entries = dataview.getUint16(8, true);
|
||||
return {
|
||||
version: version,
|
||||
json_size: json_size,
|
||||
root_entries: root_entries,
|
||||
};
|
||||
var magic = dataview.getUint16(0, true);
|
||||
if (magic !== 19792) {
|
||||
throw new Error('File header does not begin with "PM"');
|
||||
}
|
||||
var version = dataview.getUint16(2, true);
|
||||
var json_size = dataview.getUint32(4, true);
|
||||
var root_entries = dataview.getUint16(8, true);
|
||||
return {
|
||||
version: version,
|
||||
json_size: json_size,
|
||||
root_entries: root_entries,
|
||||
};
|
||||
};
|
||||
|
||||
export class PMTiles {
|
||||
root: Promise<Root> | null;
|
||||
url: string;
|
||||
leaves: Map<number, CachedLeaf>;
|
||||
maxLeaves: number;
|
||||
root: Promise<Root> | null;
|
||||
url: string;
|
||||
leaves: Map<number, CachedLeaf>;
|
||||
maxLeaves: number;
|
||||
|
||||
constructor(url: string, maxLeaves: number = 64) {
|
||||
this.root = null;
|
||||
this.url = url;
|
||||
this.leaves = new Map<number, CachedLeaf>();
|
||||
this.maxLeaves = maxLeaves;
|
||||
}
|
||||
constructor(url: string, maxLeaves: number = 64) {
|
||||
this.root = null;
|
||||
this.url = url;
|
||||
this.leaves = new Map<number, CachedLeaf>();
|
||||
this.maxLeaves = maxLeaves;
|
||||
}
|
||||
|
||||
fetchRoot = async (url: string): Promise<Root> => {
|
||||
const controller = new AbortController();
|
||||
const signal = controller.signal;
|
||||
let resp = await fetch(url, {
|
||||
signal: signal,
|
||||
headers: { Range: "bytes=0-511999" },
|
||||
});
|
||||
let contentLength = resp.headers.get("Content-Length");
|
||||
if (!contentLength || +contentLength !== 512000) {
|
||||
console.error(
|
||||
"Content-Length mismatch indicates byte serving not supported; aborting."
|
||||
);
|
||||
controller.abort();
|
||||
}
|
||||
fetchRoot = async (url: string): Promise<Root> => {
|
||||
const controller = new AbortController();
|
||||
const signal = controller.signal;
|
||||
let resp = await fetch(url, {
|
||||
signal: signal,
|
||||
headers: { Range: "bytes=0-511999" },
|
||||
});
|
||||
let contentLength = resp.headers.get("Content-Length");
|
||||
if (!contentLength || +contentLength !== 512000) {
|
||||
console.error(
|
||||
"Content-Length mismatch indicates byte serving not supported; aborting."
|
||||
);
|
||||
controller.abort();
|
||||
}
|
||||
|
||||
let a = await resp.arrayBuffer();
|
||||
let header = parseHeader(new DataView(a, 0, 10));
|
||||
let a = await resp.arrayBuffer();
|
||||
let header = parseHeader(new DataView(a, 0, 10));
|
||||
|
||||
var root_dir = new DataView(
|
||||
a,
|
||||
10 + header.json_size,
|
||||
17 * header.root_entries
|
||||
);
|
||||
if (header.version === 1) {
|
||||
console.log("Sorting pmtiles v1 directory");
|
||||
root_dir = new DataView(sortDir(root_dir));
|
||||
}
|
||||
var root_dir = new DataView(
|
||||
a,
|
||||
10 + header.json_size,
|
||||
17 * header.root_entries
|
||||
);
|
||||
if (header.version === 1) {
|
||||
console.log("Sorting pmtiles v1 directory");
|
||||
root_dir = new DataView(sortDir(root_dir));
|
||||
}
|
||||
|
||||
return {
|
||||
buffer: a,
|
||||
header: header,
|
||||
dir: root_dir,
|
||||
};
|
||||
};
|
||||
return {
|
||||
buffer: a,
|
||||
header: header,
|
||||
dir: root_dir,
|
||||
};
|
||||
};
|
||||
|
||||
getRoot = async (): Promise<Root> => {
|
||||
if (this.root) return this.root;
|
||||
this.root = this.fetchRoot(this.url);
|
||||
return this.root;
|
||||
};
|
||||
getRoot = async (): Promise<Root> => {
|
||||
if (this.root) return this.root;
|
||||
this.root = this.fetchRoot(this.url);
|
||||
return this.root;
|
||||
};
|
||||
|
||||
metadata = async (): Promise<any> => {
|
||||
let root = await this.getRoot();
|
||||
let dec = new TextDecoder("utf-8");
|
||||
let result = JSON.parse(
|
||||
dec.decode(new DataView(root.buffer, 10, root.header.json_size))
|
||||
);
|
||||
if (result.compression) {
|
||||
console.error(
|
||||
`Archive has compression type: ${result.compression} and may not be readable directly by browsers.`
|
||||
);
|
||||
}
|
||||
return result;
|
||||
};
|
||||
metadata = async (): Promise<any> => {
|
||||
let root = await this.getRoot();
|
||||
let dec = new TextDecoder("utf-8");
|
||||
let result = JSON.parse(
|
||||
dec.decode(new DataView(root.buffer, 10, root.header.json_size))
|
||||
);
|
||||
if (result.compression) {
|
||||
console.error(
|
||||
`Archive has compression type: ${result.compression} and may not be readable directly by browsers.`
|
||||
);
|
||||
}
|
||||
return result;
|
||||
};
|
||||
|
||||
fetchLeafdir = async (
|
||||
version: number,
|
||||
entry: Entry
|
||||
): Promise<ArrayBuffer> => {
|
||||
let resp = await fetch(this.url, {
|
||||
headers: {
|
||||
Range:
|
||||
"bytes=" +
|
||||
entry.offset +
|
||||
"-" +
|
||||
(entry.offset + entry.length - 1),
|
||||
},
|
||||
});
|
||||
var buf = await resp.arrayBuffer();
|
||||
fetchLeafdir = async (
|
||||
version: number,
|
||||
entry: Entry
|
||||
): Promise<ArrayBuffer> => {
|
||||
let resp = await fetch(this.url, {
|
||||
headers: {
|
||||
Range:
|
||||
"bytes=" + entry.offset + "-" + (entry.offset + entry.length - 1),
|
||||
},
|
||||
});
|
||||
var buf = await resp.arrayBuffer();
|
||||
|
||||
if (version === 1) {
|
||||
console.log("Sorting pmtiles v1 directory");
|
||||
buf = sortDir(new DataView(buf));
|
||||
}
|
||||
if (version === 1) {
|
||||
console.log("Sorting pmtiles v1 directory");
|
||||
buf = sortDir(new DataView(buf));
|
||||
}
|
||||
|
||||
return buf;
|
||||
};
|
||||
return buf;
|
||||
};
|
||||
|
||||
getLeafdir = async (
|
||||
version: number,
|
||||
entry: Entry
|
||||
): Promise<ArrayBuffer> => {
|
||||
let leaf = this.leaves.get(entry.offset);
|
||||
if (leaf) return await leaf.buffer;
|
||||
getLeafdir = async (version: number, entry: Entry): Promise<ArrayBuffer> => {
|
||||
let leaf = this.leaves.get(entry.offset);
|
||||
if (leaf) return await leaf.buffer;
|
||||
|
||||
var buf = this.fetchLeafdir(version, entry);
|
||||
var buf = this.fetchLeafdir(version, entry);
|
||||
|
||||
this.leaves.set(entry.offset, {
|
||||
lastUsed: performance.now(),
|
||||
buffer: buf,
|
||||
});
|
||||
if (this.leaves.size > this.maxLeaves) {
|
||||
var minUsed = Infinity;
|
||||
var minKey = undefined;
|
||||
this.leaves.forEach((val, key) => {
|
||||
if (val.lastUsed < minUsed) {
|
||||
minUsed = val.lastUsed;
|
||||
minKey = key;
|
||||
}
|
||||
});
|
||||
if (minKey) this.leaves.delete(minKey);
|
||||
}
|
||||
return await buf;
|
||||
};
|
||||
this.leaves.set(entry.offset, {
|
||||
lastUsed: performance.now(),
|
||||
buffer: buf,
|
||||
});
|
||||
if (this.leaves.size > this.maxLeaves) {
|
||||
var minUsed = Infinity;
|
||||
var minKey = undefined;
|
||||
this.leaves.forEach((val, key) => {
|
||||
if (val.lastUsed < minUsed) {
|
||||
minUsed = val.lastUsed;
|
||||
minKey = key;
|
||||
}
|
||||
});
|
||||
if (minKey) this.leaves.delete(minKey);
|
||||
}
|
||||
return await buf;
|
||||
};
|
||||
|
||||
getZxy = async (z: number, x: number, y: number): Promise<Entry | null> => {
|
||||
let root = await this.getRoot();
|
||||
let entry = queryTile(root.dir, z, x, y);
|
||||
if (entry) return entry;
|
||||
getZxy = async (z: number, x: number, y: number): Promise<Entry | null> => {
|
||||
let root = await this.getRoot();
|
||||
let entry = queryTile(root.dir, z, x, y);
|
||||
if (entry) return entry;
|
||||
|
||||
let leafcoords = deriveLeaf({ z: z, x: x, y: y });
|
||||
let leafdir_entry = queryLeafdir(
|
||||
root.dir,
|
||||
leafcoords.z,
|
||||
leafcoords.x,
|
||||
leafcoords.y
|
||||
);
|
||||
let leafcoords = deriveLeaf({ z: z, x: x, y: y });
|
||||
let leafdir_entry = queryLeafdir(
|
||||
root.dir,
|
||||
leafcoords.z,
|
||||
leafcoords.x,
|
||||
leafcoords.y
|
||||
);
|
||||
|
||||
if (leafdir_entry) {
|
||||
let leafdir = await this.getLeafdir(
|
||||
root.header.version,
|
||||
leafdir_entry
|
||||
);
|
||||
return queryTile(new DataView(leafdir), z, x, y);
|
||||
}
|
||||
return null;
|
||||
};
|
||||
if (leafdir_entry) {
|
||||
let leafdir = await this.getLeafdir(root.header.version, leafdir_entry);
|
||||
return queryTile(new DataView(leafdir), z, x, y);
|
||||
}
|
||||
return null;
|
||||
};
|
||||
}
|
||||
|
||||
export const leafletLayer = (source: PMTiles, options: any) => {
|
||||
var cls = L.GridLayer.extend({
|
||||
createTile: function (coord: any, done: any) {
|
||||
var tile: any = document.createElement("img");
|
||||
source.getZxy(coord.z, coord.x, coord.y).then((result) => {
|
||||
if (result === null) return;
|
||||
var cls = L.GridLayer.extend({
|
||||
createTile: function (coord: any, done: any) {
|
||||
var tile: any = document.createElement("img");
|
||||
source.getZxy(coord.z, coord.x, coord.y).then((result) => {
|
||||
if (result === null) return;
|
||||
|
||||
const controller = new AbortController();
|
||||
const signal = controller.signal;
|
||||
tile.cancel = () => {
|
||||
controller.abort();
|
||||
};
|
||||
fetch(source.url, {
|
||||
signal: signal,
|
||||
headers: {
|
||||
Range:
|
||||
"bytes=" +
|
||||
result.offset +
|
||||
"-" +
|
||||
(result.offset + result.length - 1),
|
||||
},
|
||||
})
|
||||
.then((resp) => {
|
||||
return resp.arrayBuffer();
|
||||
})
|
||||
.then((buf) => {
|
||||
var blob = new Blob([buf], { type: "image/png" });
|
||||
var imageUrl = window.URL.createObjectURL(blob);
|
||||
tile.src = imageUrl;
|
||||
tile.cancel = null;
|
||||
done(null, tile);
|
||||
})
|
||||
.catch((error) => {
|
||||
if (error.name !== "AbortError") throw error;
|
||||
});
|
||||
});
|
||||
return tile;
|
||||
},
|
||||
const controller = new AbortController();
|
||||
const signal = controller.signal;
|
||||
tile.cancel = () => {
|
||||
controller.abort();
|
||||
};
|
||||
fetch(source.url, {
|
||||
signal: signal,
|
||||
headers: {
|
||||
Range:
|
||||
"bytes=" +
|
||||
result.offset +
|
||||
"-" +
|
||||
(result.offset + result.length - 1),
|
||||
},
|
||||
})
|
||||
.then((resp) => {
|
||||
return resp.arrayBuffer();
|
||||
})
|
||||
.then((buf) => {
|
||||
var blob = new Blob([buf], { type: "image/png" });
|
||||
var imageUrl = window.URL.createObjectURL(blob);
|
||||
tile.src = imageUrl;
|
||||
tile.cancel = null;
|
||||
done(null, tile);
|
||||
})
|
||||
.catch((error) => {
|
||||
if (error.name !== "AbortError") throw error;
|
||||
});
|
||||
});
|
||||
return tile;
|
||||
},
|
||||
|
||||
_removeTile: function (key: string) {
|
||||
var tile = this._tiles[key];
|
||||
if (!tile) {
|
||||
return;
|
||||
}
|
||||
_removeTile: function (key: string) {
|
||||
var tile = this._tiles[key];
|
||||
if (!tile) {
|
||||
return;
|
||||
}
|
||||
|
||||
if (tile.el.cancel) tile.el.cancel();
|
||||
if (tile.el.cancel) tile.el.cancel();
|
||||
|
||||
tile.el.width = 0;
|
||||
tile.el.height = 0;
|
||||
tile.el.deleted = true;
|
||||
L.DomUtil.remove(tile.el);
|
||||
delete this._tiles[key];
|
||||
this.fire("tileunload", {
|
||||
tile: tile.el,
|
||||
coords: this._keyToTileCoords(key),
|
||||
});
|
||||
},
|
||||
});
|
||||
return new cls(options);
|
||||
tile.el.width = 0;
|
||||
tile.el.height = 0;
|
||||
tile.el.deleted = true;
|
||||
L.DomUtil.remove(tile.el);
|
||||
delete this._tiles[key];
|
||||
this.fire("tileunload", {
|
||||
tile: tile.el,
|
||||
coords: this._keyToTileCoords(key),
|
||||
});
|
||||
},
|
||||
});
|
||||
return new cls(options);
|
||||
};
|
||||
|
||||
export const addProtocol = (maplibregl: any) => {
|
||||
let re = new RegExp(/pmtiles:\/\/(.+)\/(\d+)\/(\d+)\/(\d+)/);
|
||||
let pmtiles_instances = new Map<string, PMTiles>();
|
||||
maplibregl.addProtocol("pmtiles", (params: any, callback: any) => {
|
||||
let result = params.url.match(re);
|
||||
let pmtiles_url = result[1];
|
||||
let re = new RegExp(/pmtiles:\/\/(.+)\/(\d+)\/(\d+)\/(\d+)/);
|
||||
let pmtiles_instances = new Map<string, PMTiles>();
|
||||
maplibregl.addProtocol("pmtiles", (params: any, callback: any) => {
|
||||
let result = params.url.match(re);
|
||||
let pmtiles_url = result[1];
|
||||
|
||||
var instance = pmtiles_instances.get(pmtiles_url);
|
||||
if (!instance) {
|
||||
instance = new PMTiles(pmtiles_url);
|
||||
pmtiles_instances.set(pmtiles_url, instance);
|
||||
}
|
||||
let z = result[2];
|
||||
let x = result[3];
|
||||
let y = result[4];
|
||||
var cancel = () => {};
|
||||
var instance = pmtiles_instances.get(pmtiles_url);
|
||||
if (!instance) {
|
||||
instance = new PMTiles(pmtiles_url);
|
||||
pmtiles_instances.set(pmtiles_url, instance);
|
||||
}
|
||||
let z = result[2];
|
||||
let x = result[3];
|
||||
let y = result[4];
|
||||
var cancel = () => {};
|
||||
|
||||
instance.getZxy(+z, +x, +y).then((val) => {
|
||||
if (val) {
|
||||
let headers = {
|
||||
Range:
|
||||
"bytes=" +
|
||||
val.offset +
|
||||
"-" +
|
||||
(val.offset + val.length - 1),
|
||||
};
|
||||
const controller = new AbortController();
|
||||
const signal = controller.signal;
|
||||
cancel = () => {
|
||||
controller.abort();
|
||||
};
|
||||
fetch(pmtiles_url, { signal: signal, headers: headers })
|
||||
.then((resp) => {
|
||||
return resp.arrayBuffer();
|
||||
})
|
||||
.then((arr) => {
|
||||
callback(null, arr, null, null);
|
||||
})
|
||||
.catch((e) => {
|
||||
callback(new Error("Canceled"), null, null, null);
|
||||
});
|
||||
} else {
|
||||
callback(null, new Uint8Array(), null, null);
|
||||
}
|
||||
});
|
||||
return {
|
||||
cancel: () => {
|
||||
cancel();
|
||||
},
|
||||
};
|
||||
});
|
||||
return pmtiles_instances;
|
||||
instance.getZxy(+z, +x, +y).then((val) => {
|
||||
if (val) {
|
||||
let headers = {
|
||||
Range: "bytes=" + val.offset + "-" + (val.offset + val.length - 1),
|
||||
};
|
||||
const controller = new AbortController();
|
||||
const signal = controller.signal;
|
||||
cancel = () => {
|
||||
controller.abort();
|
||||
};
|
||||
fetch(pmtiles_url, { signal: signal, headers: headers })
|
||||
.then((resp) => {
|
||||
return resp.arrayBuffer();
|
||||
})
|
||||
.then((arr) => {
|
||||
callback(null, arr, null, null);
|
||||
})
|
||||
.catch((e) => {
|
||||
callback(new Error("Canceled"), null, null, null);
|
||||
});
|
||||
} else {
|
||||
callback(null, new Uint8Array(), null, null);
|
||||
}
|
||||
});
|
||||
return {
|
||||
cancel: () => {
|
||||
cancel();
|
||||
},
|
||||
};
|
||||
});
|
||||
return pmtiles_instances;
|
||||
};
|
||||
|
||||
Reference in New Issue
Block a user