ad62739a6e
In addition to using const and let, this also upgrades our linter config and removes lint (mostly whitespace).
58 lines
1.3 KiB
JavaScript
58 lines
1.3 KiB
JavaScript
/**
|
|
* @module ol/TileCache
|
|
*/
|
|
import {inherits} from './index.js';
|
|
import LRUCache from './structs/LRUCache.js';
|
|
import _ol_tilecoord_ from './tilecoord.js';
|
|
|
|
/**
|
|
* @constructor
|
|
* @extends {ol.structs.LRUCache.<ol.Tile>}
|
|
* @param {number=} opt_highWaterMark High water mark.
|
|
* @struct
|
|
*/
|
|
const TileCache = function(opt_highWaterMark) {
|
|
|
|
LRUCache.call(this, opt_highWaterMark);
|
|
|
|
};
|
|
|
|
inherits(TileCache, LRUCache);
|
|
|
|
|
|
/**
|
|
* @param {Object.<string, ol.TileRange>} usedTiles Used tiles.
|
|
*/
|
|
TileCache.prototype.expireCache = function(usedTiles) {
|
|
let tile, zKey;
|
|
while (this.canExpireCache()) {
|
|
tile = this.peekLast();
|
|
zKey = tile.tileCoord[0].toString();
|
|
if (zKey in usedTiles && usedTiles[zKey].contains(tile.tileCoord)) {
|
|
break;
|
|
} else {
|
|
this.pop().dispose();
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* Prune all tiles from the cache that don't have the same z as the newest tile.
|
|
*/
|
|
TileCache.prototype.pruneExceptNewestZ = function() {
|
|
if (this.getCount() === 0) {
|
|
return;
|
|
}
|
|
const key = this.peekFirstKey();
|
|
const tileCoord = _ol_tilecoord_.fromKey(key);
|
|
const z = tileCoord[0];
|
|
this.forEach(function(tile) {
|
|
if (tile.tileCoord[0] !== z) {
|
|
this.remove(_ol_tilecoord_.getKey(tile.tileCoord));
|
|
tile.dispose();
|
|
}
|
|
}, this);
|
|
};
|
|
export default TileCache;
|