72 lines
1.8 KiB
JavaScript
72 lines
1.8 KiB
JavaScript
goog.provide('ol.TileUrlFunction');
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goog.provide('ol.TileUrlFunctionType');
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goog.require('goog.math');
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goog.require('ol.TileCoord');
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/**
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* @typedef {function(ol.TileCoord): string|undefined}
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*/
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ol.TileUrlFunctionType;
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/**
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* @param {string} template Template.
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* @return {ol.TileUrlFunctionType} Tile URL function.
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*/
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ol.TileUrlFunction.createFromTemplate = function(template) {
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return function(tileCoord) {
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if (goog.isNull(tileCoord)) {
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return undefined;
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} else {
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return template.replace(/\{z\}/, tileCoord.z)
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.replace(/\{x\}/, tileCoord.x)
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.replace(/\{y\}/, tileCoord.y);
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}
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};
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};
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/**
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* @param {Array.<ol.TileUrlFunctionType>} tileUrlFunctions Tile URL Functions.
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* @return {ol.TileUrlFunctionType} Tile URL function.
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*/
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ol.TileUrlFunction.createFromTileUrlFunctions = function(tileUrlFunctions) {
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return function(tileCoord) {
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if (goog.isNull(tileCoord)) {
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return undefined;
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} else {
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var index = goog.math.modulo(tileCoord.hash(), tileUrlFunctions.length);
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return tileUrlFunctions[index](tileCoord);
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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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* @return {ol.TileUrlFunctionType} Tile URL function.
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*/
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ol.TileUrlFunction.createFromTemplates = function(templates) {
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return ol.TileUrlFunction.createFromTileUrlFunctions(
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goog.array.map(templates, ol.TileUrlFunction.createFromTemplate));
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};
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/**
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* @param {function(ol.TileCoord): ol.TileCoord} transform Transform.
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* @param {ol.TileUrlFunctionType} tileUrlFunction Tile URL function.
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* @return {ol.TileUrlFunctionType} Tile URL function.
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*/
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ol.TileUrlFunction.withTileCoordTransform =
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function(transform, tileUrlFunction) {
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return function(tileCoord) {
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if (goog.isNull(tileCoord)) {
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return undefined;
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} else {
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return tileUrlFunction(transform(tileCoord));
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}
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};
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};
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