481 lines
14 KiB
JavaScript
481 lines
14 KiB
JavaScript
// FIXME probably need to reset TileLayerZ if offsets get too large
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// FIXME when zooming out, preserve higher Z divs to avoid white flash
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goog.provide('ol.renderer.dom.TileLayer');
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goog.require('goog.array');
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goog.require('goog.asserts');
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goog.require('goog.dom');
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goog.require('goog.dom.TagName');
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goog.require('goog.object');
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goog.require('goog.style');
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goog.require('goog.vec.Mat4');
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goog.require('ol');
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goog.require('ol.Coordinate');
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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.ViewHint');
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goog.require('ol.dom');
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goog.require('ol.dom.BrowserFeature');
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goog.require('ol.extent');
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goog.require('ol.layer.Tile');
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goog.require('ol.renderer.dom.Layer');
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goog.require('ol.tilecoord');
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goog.require('ol.tilegrid.TileGrid');
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goog.require('ol.vec.Mat4');
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/**
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* @constructor
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* @extends {ol.renderer.dom.Layer}
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* @param {ol.renderer.Map} mapRenderer Map renderer.
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* @param {ol.layer.Tile} tileLayer Tile layer.
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*/
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ol.renderer.dom.TileLayer = function(mapRenderer, tileLayer) {
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var target = goog.dom.createElement(goog.dom.TagName.DIV);
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target.style.position = 'absolute';
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// Needed for IE7-8 to render a transformed element correctly
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if (ol.dom.BrowserFeature.USE_MS_MATRIX_TRANSFORM) {
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target.style.width = '100%';
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target.style.height = '100%';
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}
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goog.base(this, mapRenderer, tileLayer, target);
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/**
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* @private
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* @type {boolean}
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*/
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this.renderedVisible_ = true;
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/**
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* @private
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* @type {number}
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*/
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this.renderedOpacity_ = 1;
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/**
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* @private
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* @type {number}
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*/
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this.renderedRevision_ = 0;
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/**
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* @private
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* @type {Object.<number, ol.renderer.dom.TileLayerZ_>}
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*/
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this.tileLayerZs_ = {};
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};
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goog.inherits(ol.renderer.dom.TileLayer, ol.renderer.dom.Layer);
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/**
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* @inheritDoc
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*/
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ol.renderer.dom.TileLayer.prototype.clearFrame = function() {
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goog.dom.removeChildren(this.target);
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this.renderedRevision_ = 0;
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};
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/**
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* @inheritDoc
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*/
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ol.renderer.dom.TileLayer.prototype.prepareFrame =
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function(frameState, layerState) {
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if (!layerState.visible) {
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if (this.renderedVisible_) {
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goog.style.setElementShown(this.target, false);
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this.renderedVisible_ = false;
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}
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return true;
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}
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var pixelRatio = frameState.pixelRatio;
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var viewState = frameState.viewState;
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var projection = viewState.projection;
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var tileLayer = this.getLayer();
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goog.asserts.assertInstanceof(tileLayer, ol.layer.Tile);
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var tileSource = tileLayer.getSource();
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var tileGrid = tileSource.getTileGridForProjection(projection);
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var tileGutter = tileSource.getGutter();
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var z = tileGrid.getZForResolution(viewState.resolution);
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var tileResolution = tileGrid.getResolution(z);
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var center = viewState.center;
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var extent;
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if (tileResolution == viewState.resolution) {
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center = this.snapCenterToPixel(center, tileResolution, frameState.size);
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extent = ol.extent.getForViewAndSize(
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center, tileResolution, viewState.rotation, frameState.size);
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} else {
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extent = frameState.extent;
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}
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if (goog.isDef(layerState.extent)) {
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extent = ol.extent.getIntersection(extent, layerState.extent);
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}
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var tileRange = tileGrid.getTileRangeForExtentAndResolution(
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extent, tileResolution);
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/** @type {Object.<number, Object.<string, ol.Tile>>} */
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var tilesToDrawByZ = {};
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tilesToDrawByZ[z] = {};
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var getTileIfLoaded = this.createGetTileIfLoadedFunction(function(tile) {
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return !goog.isNull(tile) && tile.getState() == ol.TileState.LOADED;
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}, tileSource, pixelRatio, projection);
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var findLoadedTiles = goog.bind(tileSource.findLoadedTiles, tileSource,
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tilesToDrawByZ, getTileIfLoaded);
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var useInterimTilesOnError = tileLayer.getUseInterimTilesOnError();
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if (!goog.isDef(useInterimTilesOnError)) {
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useInterimTilesOnError = true;
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}
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var tmpExtent = ol.extent.createEmpty();
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var tmpTileRange = new ol.TileRange(0, 0, 0, 0);
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var childTileRange, fullyLoaded, tile, tileState, 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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tile = tileSource.getTile(z, x, y, pixelRatio, projection);
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tileState = tile.getState();
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if (tileState == ol.TileState.LOADED) {
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tilesToDrawByZ[z][ol.tilecoord.toString(tile.tileCoord)] = tile;
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continue;
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} else if (tileState == ol.TileState.EMPTY ||
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(tileState == ol.TileState.ERROR &&
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!useInterimTilesOnError)) {
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continue;
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}
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fullyLoaded = tileGrid.forEachTileCoordParentTileRange(
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tile.tileCoord, findLoadedTiles, null, tmpTileRange, tmpExtent);
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if (!fullyLoaded) {
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childTileRange = tileGrid.getTileCoordChildTileRange(
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tile.tileCoord, tmpTileRange, tmpExtent);
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if (!goog.isNull(childTileRange)) {
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findLoadedTiles(z + 1, childTileRange);
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}
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}
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}
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}
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// If the tile source revision changes, we destroy the existing DOM structure
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// so that a new one will be created. It would be more efficient to modify
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// the existing structure.
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var tileLayerZ, tileLayerZKey;
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if (this.renderedRevision_ != tileSource.getRevision()) {
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for (tileLayerZKey in this.tileLayerZs_) {
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tileLayerZ = this.tileLayerZs_[+tileLayerZKey];
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goog.dom.removeNode(tileLayerZ.target);
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}
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this.tileLayerZs_ = {};
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this.renderedRevision_ = tileSource.getRevision();
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}
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/** @type {Array.<number>} */
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var zs = goog.array.map(goog.object.getKeys(tilesToDrawByZ), Number);
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goog.array.sort(zs);
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/** @type {Object.<number, boolean>} */
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var newTileLayerZKeys = {};
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var iz, iziz, tileCoordKey, tileCoordOrigin, tilesToDraw;
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for (iz = 0, iziz = zs.length; iz < iziz; ++iz) {
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tileLayerZKey = zs[iz];
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if (tileLayerZKey in this.tileLayerZs_) {
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tileLayerZ = this.tileLayerZs_[tileLayerZKey];
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} else {
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tileCoordOrigin =
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tileGrid.getTileCoordForCoordAndZ(center, tileLayerZKey);
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tileLayerZ = new ol.renderer.dom.TileLayerZ_(tileGrid, tileCoordOrigin);
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newTileLayerZKeys[tileLayerZKey] = true;
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this.tileLayerZs_[tileLayerZKey] = tileLayerZ;
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}
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tilesToDraw = tilesToDrawByZ[tileLayerZKey];
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for (tileCoordKey in tilesToDraw) {
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tileLayerZ.addTile(tilesToDraw[tileCoordKey], tileGutter);
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}
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tileLayerZ.finalizeAddTiles();
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}
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/** @type {Array.<number>} */
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var tileLayerZKeys =
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goog.array.map(goog.object.getKeys(this.tileLayerZs_), Number);
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goog.array.sort(tileLayerZKeys);
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var i, ii, j, origin, resolution;
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var transform = goog.vec.Mat4.createNumber();
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for (i = 0, ii = tileLayerZKeys.length; i < ii; ++i) {
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tileLayerZKey = tileLayerZKeys[i];
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tileLayerZ = this.tileLayerZs_[tileLayerZKey];
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if (!(tileLayerZKey in tilesToDrawByZ)) {
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goog.dom.removeNode(tileLayerZ.target);
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delete this.tileLayerZs_[tileLayerZKey];
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continue;
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}
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resolution = tileLayerZ.getResolution();
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origin = tileLayerZ.getOrigin();
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ol.vec.Mat4.makeTransform2D(transform,
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frameState.size[0] / 2, frameState.size[1] / 2,
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resolution / viewState.resolution,
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resolution / viewState.resolution,
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viewState.rotation,
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(origin[0] - center[0]) / resolution,
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(center[1] - origin[1]) / resolution);
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tileLayerZ.setTransform(transform);
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if (tileLayerZKey in newTileLayerZKeys) {
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for (j = tileLayerZKey - 1; j >= 0; --j) {
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if (j in this.tileLayerZs_) {
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goog.dom.insertSiblingAfter(
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tileLayerZ.target, this.tileLayerZs_[j].target);
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break;
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}
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}
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if (j < 0) {
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goog.dom.insertChildAt(this.target, tileLayerZ.target, 0);
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}
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} else {
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if (!frameState.viewHints[ol.ViewHint.ANIMATING] &&
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!frameState.viewHints[ol.ViewHint.INTERACTING]) {
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tileLayerZ.removeTilesOutsideExtent(extent, tmpTileRange);
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}
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}
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}
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if (layerState.opacity != this.renderedOpacity_) {
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ol.dom.setOpacity(this.target, layerState.opacity);
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this.renderedOpacity_ = layerState.opacity;
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}
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if (layerState.visible && !this.renderedVisible_) {
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goog.style.setElementShown(this.target, true);
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this.renderedVisible_ = true;
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}
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this.updateUsedTiles(frameState.usedTiles, tileSource, z, tileRange);
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this.manageTilePyramid(frameState, tileSource, tileGrid, pixelRatio,
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projection, extent, z, tileLayer.getPreload());
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this.scheduleExpireCache(frameState, tileSource);
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this.updateLogos(frameState, tileSource);
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return true;
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};
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/**
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* @constructor
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* @private
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* @param {ol.tilegrid.TileGrid} tileGrid Tile grid.
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* @param {ol.TileCoord} tileCoordOrigin Tile coord origin.
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*/
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ol.renderer.dom.TileLayerZ_ = function(tileGrid, tileCoordOrigin) {
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/**
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* @type {!Element}
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*/
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this.target = goog.dom.createElement(goog.dom.TagName.DIV);
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this.target.style.position = 'absolute';
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this.target.style.width = '100%';
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this.target.style.height = '100%';
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if (ol.LEGACY_IE_SUPPORT && ol.IS_LEGACY_IE) {
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/**
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* Needed due to issues with IE7-8 clipping of transformed elements
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* Solution is to translate separately from the scaled/rotated elements
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* @private
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* @type {!Element}
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*/
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this.translateTarget_ = goog.dom.createElement(goog.dom.TagName.DIV);
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this.translateTarget_.style.position = 'absolute';
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this.translateTarget_.style.width = '100%';
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this.translateTarget_.style.height = '100%';
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goog.dom.appendChild(this.target, this.translateTarget_);
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}
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/**
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* @private
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* @type {ol.tilegrid.TileGrid}
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*/
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this.tileGrid_ = tileGrid;
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/**
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* @private
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* @type {ol.TileCoord}
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*/
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this.tileCoordOrigin_ = tileCoordOrigin;
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/**
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* @private
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* @type {ol.Coordinate}
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*/
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this.origin_ =
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ol.extent.getTopLeft(tileGrid.getTileCoordExtent(tileCoordOrigin));
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/**
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* @private
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* @type {number}
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*/
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this.resolution_ = tileGrid.getResolution(tileCoordOrigin[0]);
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/**
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* @private
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* @type {Object.<string, ol.Tile>}
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*/
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this.tiles_ = {};
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/**
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* @private
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* @type {DocumentFragment}
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*/
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this.documentFragment_ = null;
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/**
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* @private
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* @type {goog.vec.Mat4.Number}
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*/
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this.transform_ = goog.vec.Mat4.createNumberIdentity();
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};
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/**
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* @param {ol.Tile} tile Tile.
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* @param {number} tileGutter Tile gutter.
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*/
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ol.renderer.dom.TileLayerZ_.prototype.addTile = function(tile, tileGutter) {
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var tileCoord = tile.tileCoord;
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var tileCoordZ = tileCoord[0];
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var tileCoordX = tileCoord[1];
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var tileCoordY = tileCoord[2];
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goog.asserts.assert(tileCoordZ == this.tileCoordOrigin_[0]);
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var tileCoordKey = ol.tilecoord.toString(tileCoord);
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if (tileCoordKey in this.tiles_) {
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return;
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}
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var tileSize = this.tileGrid_.getTileSize(tileCoordZ);
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var image = tile.getImage(this);
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var imageStyle = image.style;
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// Bootstrap sets the style max-width: 100% for all images, which
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// prevents the tile from being displayed in FireFox. Workaround
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// by overriding the max-width style.
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imageStyle.maxWidth = 'none';
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var tileElement;
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var tileElementStyle;
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if (tileGutter > 0) {
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tileElement = goog.dom.createElement(goog.dom.TagName.DIV);
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tileElementStyle = tileElement.style;
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tileElementStyle.overflow = 'hidden';
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tileElementStyle.width = tileSize + 'px';
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tileElementStyle.height = tileSize + 'px';
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imageStyle.position = 'absolute';
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imageStyle.left = -tileGutter + 'px';
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imageStyle.top = -tileGutter + 'px';
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imageStyle.width = (tileSize + 2 * tileGutter) + 'px';
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imageStyle.height = (tileSize + 2 * tileGutter) + 'px';
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goog.dom.appendChild(tileElement, image);
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} else {
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imageStyle.width = tileSize + 'px';
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imageStyle.height = tileSize + 'px';
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tileElement = image;
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tileElementStyle = imageStyle;
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}
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tileElementStyle.position = 'absolute';
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tileElementStyle.left =
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((tileCoordX - this.tileCoordOrigin_[1]) * tileSize) + 'px';
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tileElementStyle.top =
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((this.tileCoordOrigin_[2] - tileCoordY) * tileSize) + 'px';
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if (goog.isNull(this.documentFragment_)) {
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this.documentFragment_ = document.createDocumentFragment();
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}
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goog.dom.appendChild(this.documentFragment_, tileElement);
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this.tiles_[tileCoordKey] = tile;
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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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ol.renderer.dom.TileLayerZ_.prototype.finalizeAddTiles = function() {
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if (!goog.isNull(this.documentFragment_)) {
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if (ol.LEGACY_IE_SUPPORT && ol.IS_LEGACY_IE) {
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goog.dom.appendChild(this.translateTarget_, this.documentFragment_);
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} else {
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goog.dom.appendChild(this.target, this.documentFragment_);
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}
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this.documentFragment_ = null;
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}
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};
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/**
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* @return {ol.Coordinate} Origin.
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*/
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ol.renderer.dom.TileLayerZ_.prototype.getOrigin = function() {
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return this.origin_;
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};
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/**
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* @return {number} Resolution.
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*/
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ol.renderer.dom.TileLayerZ_.prototype.getResolution = function() {
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return this.resolution_;
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};
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/**
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* @param {ol.Extent} extent Extent.
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* @param {ol.TileRange=} opt_tileRange Temporary ol.TileRange object.
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*/
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ol.renderer.dom.TileLayerZ_.prototype.removeTilesOutsideExtent =
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function(extent, opt_tileRange) {
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var tileRange = this.tileGrid_.getTileRangeForExtentAndZ(
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extent, this.tileCoordOrigin_[0], opt_tileRange);
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/** @type {Array.<ol.Tile>} */
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var tilesToRemove = [];
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var tile, tileCoordKey;
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for (tileCoordKey in this.tiles_) {
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tile = this.tiles_[tileCoordKey];
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if (!tileRange.contains(tile.tileCoord)) {
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tilesToRemove.push(tile);
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}
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}
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var i, ii;
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for (i = 0, ii = tilesToRemove.length; i < ii; ++i) {
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tile = tilesToRemove[i];
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tileCoordKey = ol.tilecoord.toString(tile.tileCoord);
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goog.dom.removeNode(tile.getImage(this));
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delete this.tiles_[tileCoordKey];
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}
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};
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/**
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* @param {goog.vec.Mat4.Number} transform Transform.
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*/
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ol.renderer.dom.TileLayerZ_.prototype.setTransform = function(transform) {
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if (!ol.vec.Mat4.equals2D(transform, this.transform_)) {
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if (ol.LEGACY_IE_SUPPORT && ol.IS_LEGACY_IE) {
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ol.dom.transformElement2D(this.target, transform, 6,
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this.translateTarget_);
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} else {
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ol.dom.transformElement2D(this.target, transform, 6);
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}
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goog.vec.Mat4.setFromArray(this.transform_, transform);
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}
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};
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