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106 lines
3.2 KiB
JavaScript
106 lines
3.2 KiB
JavaScript
/**
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* @module ol/style/IconImageCache
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*/
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import { asString } from '../color.js';
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/**
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* @classdesc
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* Singleton class. Available through {@link module:ol/style/IconImageCache.shared}.
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*/
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var IconImageCache = /** @class */ (function () {
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function IconImageCache() {
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/**
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* @type {!Object<string, import("./IconImage.js").default>}
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* @private
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*/
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this.cache_ = {};
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/**
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* @type {number}
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* @private
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*/
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this.cacheSize_ = 0;
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/**
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* @type {number}
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* @private
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*/
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this.maxCacheSize_ = 32;
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}
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/**
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* FIXME empty description for jsdoc
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*/
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IconImageCache.prototype.clear = function () {
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this.cache_ = {};
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this.cacheSize_ = 0;
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};
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/**
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* @return {boolean} Can expire cache.
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*/
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IconImageCache.prototype.canExpireCache = function () {
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return this.cacheSize_ > this.maxCacheSize_;
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};
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/**
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* FIXME empty description for jsdoc
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*/
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IconImageCache.prototype.expire = function () {
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if (this.canExpireCache()) {
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var i = 0;
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for (var key in this.cache_) {
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var iconImage = this.cache_[key];
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if ((i++ & 3) === 0 && !iconImage.hasListener()) {
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delete this.cache_[key];
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--this.cacheSize_;
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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 {string} src Src.
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* @param {?string} crossOrigin Cross origin.
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* @param {import("../color.js").Color} color Color.
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* @return {import("./IconImage.js").default} Icon image.
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*/
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IconImageCache.prototype.get = function (src, crossOrigin, color) {
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var key = getKey(src, crossOrigin, color);
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return key in this.cache_ ? this.cache_[key] : null;
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};
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/**
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* @param {string} src Src.
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* @param {?string} crossOrigin Cross origin.
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* @param {import("../color.js").Color} color Color.
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* @param {import("./IconImage.js").default} iconImage Icon image.
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*/
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IconImageCache.prototype.set = function (src, crossOrigin, color, iconImage) {
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var key = getKey(src, crossOrigin, color);
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this.cache_[key] = iconImage;
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++this.cacheSize_;
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};
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/**
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* Set the cache size of the icon cache. Default is `32`. Change this value when
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* your map uses more than 32 different icon images and you are not caching icon
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* styles on the application level.
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* @param {number} maxCacheSize Cache max size.
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* @api
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*/
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IconImageCache.prototype.setSize = function (maxCacheSize) {
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this.maxCacheSize_ = maxCacheSize;
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this.expire();
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};
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return IconImageCache;
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}());
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/**
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* @param {string} src Src.
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* @param {?string} crossOrigin Cross origin.
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* @param {import("../color.js").Color} color Color.
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* @return {string} Cache key.
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*/
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function getKey(src, crossOrigin, color) {
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var colorString = color ? asString(color) : 'null';
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return crossOrigin + ':' + src + ':' + colorString;
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}
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export default IconImageCache;
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/**
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* The {@link module:ol/style/IconImageCache~IconImageCache} for
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* {@link module:ol/style/Icon~Icon} images.
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* @api
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*/
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export var shared = new IconImageCache();
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//# sourceMappingURL=IconImageCache.js.map
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