ddf993f0c9
The findInterimTiles method was used in three renderers. This change makes it available on the tile source and adds some basic tests.
121 lines
3.1 KiB
JavaScript
121 lines
3.1 KiB
JavaScript
goog.provide('ol.source.TileSource');
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goog.provide('ol.source.TileSourceOptions');
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goog.require('goog.functions');
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goog.require('ol.Attribution');
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goog.require('ol.Extent');
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goog.require('ol.Projection');
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goog.require('ol.Tile');
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goog.require('ol.TileCoord');
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goog.require('ol.TileRange');
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goog.require('ol.TileState');
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goog.require('ol.source.Source');
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goog.require('ol.tilegrid.TileGrid');
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/**
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* @typedef {{attributions: (Array.<ol.Attribution>|undefined),
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* extent: (ol.Extent|undefined),
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* projection: (ol.Projection|undefined),
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* tileGrid: (ol.tilegrid.TileGrid|undefined)}}
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*/
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ol.source.TileSourceOptions;
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/**
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* @constructor
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* @extends {ol.source.Source}
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* @param {ol.source.TileSourceOptions} tileSourceOptions Tile source options.
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*/
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ol.source.TileSource = function(tileSourceOptions) {
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goog.base(this, {
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attributions: tileSourceOptions.attributions,
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extent: tileSourceOptions.extent,
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projection: tileSourceOptions.projection
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});
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/**
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* @protected
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* @type {ol.tilegrid.TileGrid}
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*/
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this.tileGrid = goog.isDef(tileSourceOptions.tileGrid) ?
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tileSourceOptions.tileGrid : null;
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};
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goog.inherits(ol.source.TileSource, ol.source.Source);
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/**
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* @return {boolean} Can expire cache.
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*/
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ol.source.TileSource.prototype.canExpireCache = goog.functions.FALSE;
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/**
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* @param {Object.<string, ol.TileRange>} usedTiles Used tiles.
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*/
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ol.source.TileSource.prototype.expireCache = goog.abstractMethod;
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/**
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* Look for loaded tiles over a given tile range and zoom level. Adds
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* properties to the provided lookup representing key/tile pairs for already
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* loaded tiles.
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*
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* @param {Object.<number, Object.<string, ol.Tile>>} loadedTilesByZ A lookup of
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* loaded tiles by zoom level.
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* @param {number} z Zoom level.
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* @param {ol.TileRange} tileRange Tile range.
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* @return {boolean} The tile range is fully covered with loaded tiles.
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*/
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ol.source.TileSource.prototype.findLoadedTiles = function(loadedTilesByZ, z,
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tileRange) {
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// FIXME this could be more efficient about filling partial holes
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var fullyCovered = true;
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var tile, tileCoord, tileCoordKey, x, y;
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for (x = tileRange.minX; x <= tileRange.maxX; ++x) {
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for (y = tileRange.minY; y <= tileRange.maxY; ++y) {
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tileCoord = new ol.TileCoord(z, x, y);
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tileCoordKey = tileCoord.toString();
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if (loadedTilesByZ[z] && loadedTilesByZ[z][tileCoordKey]) {
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return false; // TODO: fix this
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}
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tile = this.getTile(tileCoord);
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if (!goog.isNull(tile) && tile.getState() == ol.TileState.LOADED) {
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if (!loadedTilesByZ[z]) {
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loadedTilesByZ[z] = {};
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}
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loadedTilesByZ[z][tileCoordKey] = tile;
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} else {
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fullyCovered = false;
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}
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}
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}
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return fullyCovered;
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};
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/**
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* @inheritDoc
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*/
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ol.source.TileSource.prototype.getResolutions = function() {
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return this.tileGrid.getResolutions();
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};
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/**
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* @param {ol.TileCoord} tileCoord Tile coordinate.
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* @return {ol.Tile} Tile.
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*/
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ol.source.TileSource.prototype.getTile = goog.abstractMethod;
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/**
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* @return {ol.tilegrid.TileGrid} Tile grid.
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*/
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ol.source.TileSource.prototype.getTileGrid = function() {
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return this.tileGrid;
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};
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