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Don't load an already loading tile

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This commit is contained in:
Frederic Junod
2016-03-15 17:05:02 +01:00
parent 1c57686d1f
commit b0984070db
1 changed files with 8 additions and 4 deletions
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12
src/ol/tilequeue.js
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@@ -1,6 +1,7 @@
goog.provide('ol.TilePriorityFunction');
goog.provide('ol.TileQueue');
goog.require('goog.asserts');
goog.require('ol.events');
goog.require('ol.events.EventType');
goog.require('ol.Coordinate');
@@ -56,7 +57,7 @@ ol.TileQueue = function(tilePriorityFunction, tileChangeCallback) {
/**
* @private
* @type {Object.<string,boolean>}
* @type {!Object.<string,boolean>}
*/
this.tilesLoadingKeys_ = {};
@@ -104,6 +105,7 @@ ol.TileQueue.prototype.handleTileChange = function(event) {
}
this.tileChangeCallback_();
}
goog.asserts.assert(Object.keys(this.tilesLoadingKeys_).length === this.tilesLoading_);
};
@@ -113,15 +115,17 @@ ol.TileQueue.prototype.handleTileChange = function(event) {
*/
ol.TileQueue.prototype.loadMoreTiles = function(maxTotalLoading, maxNewLoads) {
var newLoads = 0;
var tile;
var tile, tileKey;
while (this.tilesLoading_ < maxTotalLoading && newLoads < maxNewLoads &&
this.getCount() > 0) {
tile = /** @type {ol.Tile} */ (this.dequeue()[0]);
if (tile.getState() === ol.TileState.IDLE) {
this.tilesLoadingKeys_[tile.getKey()] = true;
tileKey = tile.getKey();
if (tile.getState() === ol.TileState.IDLE && !(tileKey in this.tilesLoadingKeys_)) {
this.tilesLoadingKeys_[tileKey] = true;
++this.tilesLoading_;
++newLoads;
tile.load();
}
goog.asserts.assert(Object.keys(this.tilesLoadingKeys_).length === this.tilesLoading_);
}
};