Imports cased like the filename

2017-12-11 16:26:11 -07:00
parent 46fd03047b
commit 1cdb6a66f0
287 changed files with 1 additions and 2 deletions
--- a/src/ol/TileQueue.js
+++ b/src/ol/TileQueue.js
@@ -0,0 +1,130 @@
+goog.provide('ol.TileQueue');
+
+goog.require('ol');
+goog.require('ol.TileState');
+goog.require('ol.events');
+goog.require('ol.events.EventType');
+goog.require('ol.structs.PriorityQueue');
+
+
+/**
+ * @constructor
+ * @extends {ol.structs.PriorityQueue.<Array>}
+ * @param {ol.TilePriorityFunction} tilePriorityFunction
+ *     Tile priority function.
+ * @param {function(): ?} tileChangeCallback
+ *     Function called on each tile change event.
+ * @struct
+ */
+ol.TileQueue = function(tilePriorityFunction, tileChangeCallback) {
+
+  ol.structs.PriorityQueue.call(
+      this,
+      /**
+       * @param {Array} element Element.
+       * @return {number} Priority.
+       */
+      function(element) {
+        return tilePriorityFunction.apply(null, element);
+      },
+      /**
+       * @param {Array} element Element.
+       * @return {string} Key.
+       */
+      function(element) {
+        return /** @type {ol.Tile} */ (element[0]).getKey();
+      });
+
+  /**
+   * @private
+   * @type {function(): ?}
+   */
+  this.tileChangeCallback_ = tileChangeCallback;
+
+  /**
+   * @private
+   * @type {number}
+   */
+  this.tilesLoading_ = 0;
+
+  /**
+   * @private
+   * @type {!Object.<string,boolean>}
+   */
+  this.tilesLoadingKeys_ = {};
+
+};
+ol.inherits(ol.TileQueue, ol.structs.PriorityQueue);
+
+
+/**
+ * @inheritDoc
+ */
+ol.TileQueue.prototype.enqueue = function(element) {
+  var added = ol.structs.PriorityQueue.prototype.enqueue.call(this, element);
+  if (added) {
+    var tile = element[0];
+    ol.events.listen(tile, ol.events.EventType.CHANGE,
+        this.handleTileChange, this);
+  }
+  return added;
+};
+
+
+/**
+ * @return {number} Number of tiles loading.
+ */
+ol.TileQueue.prototype.getTilesLoading = function() {
+  return this.tilesLoading_;
+};
+
+
+/**
+ * @param {ol.events.Event} event Event.
+ * @protected
+ */
+ol.TileQueue.prototype.handleTileChange = function(event) {
+  var tile = /** @type {ol.Tile} */ (event.target);
+  var state = tile.getState();
+  if (state === ol.TileState.LOADED || state === ol.TileState.ERROR ||
+      state === ol.TileState.EMPTY || state === ol.TileState.ABORT) {
+    ol.events.unlisten(tile, ol.events.EventType.CHANGE,
+        this.handleTileChange, this);
+    var tileKey = tile.getKey();
+    if (tileKey in this.tilesLoadingKeys_) {
+      delete this.tilesLoadingKeys_[tileKey];
+      --this.tilesLoading_;
+    }
+    this.tileChangeCallback_();
+  }
+};
+
+
+/**
+ * @param {number} maxTotalLoading Maximum number tiles to load simultaneously.
+ * @param {number} maxNewLoads Maximum number of new tiles to load.
+ */
+ol.TileQueue.prototype.loadMoreTiles = function(maxTotalLoading, maxNewLoads) {
+  var newLoads = 0;
+  var abortedTiles = false;
+  var state, tile, tileKey;
+  while (this.tilesLoading_ < maxTotalLoading && newLoads < maxNewLoads &&
+         this.getCount() > 0) {
+    tile = /** @type {ol.Tile} */ (this.dequeue()[0]);
+    tileKey = tile.getKey();
+    state = tile.getState();
+    if (state === ol.TileState.ABORT) {
+      abortedTiles = true;
+    } else if (state === ol.TileState.IDLE && !(tileKey in this.tilesLoadingKeys_)) {
+      this.tilesLoadingKeys_[tileKey] = true;
+      ++this.tilesLoading_;
+      ++newLoads;
+      tile.load();
+    }
+  }
+  if (newLoads === 0 && abortedTiles) {
+    // Do not stop the render loop when all wanted tiles were aborted due to
+    // a small, saturated tile cache.
+    this.tileChangeCallback_();
+  }
+};