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120 lines
4.1 KiB
JavaScript
120 lines
4.1 KiB
JavaScript
/**
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* @module ol/tileurlfunction
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*/
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import { assert } from './asserts.js';
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import { modulo } from './math.js';
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import { hash as tileCoordHash } from './tilecoord.js';
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/**
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* @param {string} template Template.
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* @param {import("./tilegrid/TileGrid.js").default} tileGrid Tile grid.
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* @return {import("./Tile.js").UrlFunction} Tile URL function.
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*/
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export function createFromTemplate(template, tileGrid) {
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var zRegEx = /\{z\}/g;
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var xRegEx = /\{x\}/g;
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var yRegEx = /\{y\}/g;
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var dashYRegEx = /\{-y\}/g;
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return (
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/**
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* @param {import("./tilecoord.js").TileCoord} tileCoord Tile Coordinate.
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* @param {number} pixelRatio Pixel ratio.
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* @param {import("./proj/Projection.js").default} projection Projection.
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* @return {string|undefined} Tile URL.
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*/
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function (tileCoord, pixelRatio, projection) {
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if (!tileCoord) {
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return undefined;
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}
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else {
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return template
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.replace(zRegEx, tileCoord[0].toString())
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.replace(xRegEx, tileCoord[1].toString())
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.replace(yRegEx, tileCoord[2].toString())
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.replace(dashYRegEx, function () {
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var z = tileCoord[0];
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var range = tileGrid.getFullTileRange(z);
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assert(range, 55); // The {-y} placeholder requires a tile grid with extent
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var y = range.getHeight() - tileCoord[2] - 1;
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return y.toString();
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});
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}
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});
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}
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/**
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* @param {Array<string>} templates Templates.
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* @param {import("./tilegrid/TileGrid.js").default} tileGrid Tile grid.
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* @return {import("./Tile.js").UrlFunction} Tile URL function.
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*/
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export function createFromTemplates(templates, tileGrid) {
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var len = templates.length;
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var tileUrlFunctions = new Array(len);
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for (var i = 0; i < len; ++i) {
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tileUrlFunctions[i] = createFromTemplate(templates[i], tileGrid);
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}
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return createFromTileUrlFunctions(tileUrlFunctions);
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}
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/**
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* @param {Array<import("./Tile.js").UrlFunction>} tileUrlFunctions Tile URL Functions.
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* @return {import("./Tile.js").UrlFunction} Tile URL function.
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*/
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export function createFromTileUrlFunctions(tileUrlFunctions) {
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if (tileUrlFunctions.length === 1) {
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return tileUrlFunctions[0];
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}
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return (
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/**
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* @param {import("./tilecoord.js").TileCoord} tileCoord Tile Coordinate.
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* @param {number} pixelRatio Pixel ratio.
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* @param {import("./proj/Projection.js").default} projection Projection.
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* @return {string|undefined} Tile URL.
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*/
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function (tileCoord, pixelRatio, projection) {
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if (!tileCoord) {
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return undefined;
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}
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else {
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var h = tileCoordHash(tileCoord);
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var index = modulo(h, tileUrlFunctions.length);
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return tileUrlFunctions[index](tileCoord, pixelRatio, projection);
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}
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});
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}
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/**
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* @param {import("./tilecoord.js").TileCoord} tileCoord Tile coordinate.
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* @param {number} pixelRatio Pixel ratio.
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* @param {import("./proj/Projection.js").default} projection Projection.
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* @return {string|undefined} Tile URL.
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*/
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export function nullTileUrlFunction(tileCoord, pixelRatio, projection) {
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return undefined;
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}
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/**
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* @param {string} url URL.
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* @return {Array<string>} Array of urls.
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*/
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export function expandUrl(url) {
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var urls = [];
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var match = /\{([a-z])-([a-z])\}/.exec(url);
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if (match) {
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// char range
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var startCharCode = match[1].charCodeAt(0);
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var stopCharCode = match[2].charCodeAt(0);
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var charCode = void 0;
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for (charCode = startCharCode; charCode <= stopCharCode; ++charCode) {
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urls.push(url.replace(match[0], String.fromCharCode(charCode)));
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}
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return urls;
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}
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match = /\{(\d+)-(\d+)\}/.exec(url);
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if (match) {
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// number range
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var stop_1 = parseInt(match[2], 10);
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for (var i = parseInt(match[1], 10); i <= stop_1; i++) {
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urls.push(url.replace(match[0], i.toString()));
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}
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return urls;
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}
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urls.push(url);
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return urls;
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}
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//# sourceMappingURL=tileurlfunction.js.map
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