a116878a57
The addition of full extent tile ranges also allows us to simplify wrapX handling for tile layers. By limiting wrapX to true and false as possible values, we can remove a lot of guessing logic.
101 lines
2.4 KiB
JavaScript
101 lines
2.4 KiB
JavaScript
goog.provide('ol.Attribution');
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goog.require('goog.asserts');
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goog.require('goog.math');
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goog.require('ol.TileRange');
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/**
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* @classdesc
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* An attribution for a layer source.
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*
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* Example:
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*
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* source: new ol.source.OSM({
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* attributions: [
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* new ol.Attribution({
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* html: 'All maps © ' +
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* '<a href="http://www.opencyclemap.org/">OpenCycleMap</a>'
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* }),
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* ol.source.OSM.ATTRIBUTION
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* ],
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* ..
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*
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* @constructor
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* @param {olx.AttributionOptions} options Attribution options.
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* @struct
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* @api stable
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*/
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ol.Attribution = function(options) {
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/**
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* @private
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* @type {string}
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*/
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this.html_ = options.html;
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/**
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* @private
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* @type {Object.<string, Array.<ol.TileRange>>}
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*/
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this.tileRanges_ = goog.isDef(options.tileRanges) ?
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options.tileRanges : null;
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};
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/**
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* Get the attribution markup.
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* @return {string} The attribution HTML.
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* @api stable
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*/
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ol.Attribution.prototype.getHTML = function() {
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return this.html_;
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};
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/**
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* @param {Object.<string, ol.TileRange>} tileRanges Tile ranges.
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* @param {!ol.tilegrid.TileGrid} tileGrid Tile grid.
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* @param {!ol.proj.Projection} projection Projection.
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* @return {boolean} Intersects any tile range.
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*/
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ol.Attribution.prototype.intersectsAnyTileRange =
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function(tileRanges, tileGrid, projection) {
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if (goog.isNull(this.tileRanges_)) {
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return true;
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}
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var i, ii, tileRange, zKey;
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for (zKey in tileRanges) {
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if (!(zKey in this.tileRanges_)) {
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continue;
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}
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tileRange = tileRanges[zKey];
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var testTileRange;
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for (i = 0, ii = this.tileRanges_[zKey].length; i < ii; ++i) {
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testTileRange = this.tileRanges_[zKey][i];
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if (testTileRange.intersects(tileRange)) {
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return true;
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}
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var extentTileRange = tileGrid.getTileRangeForExtentAndZ(
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projection.getExtent(), parseInt(zKey, 10));
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var width = extentTileRange.getWidth();
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if (tileRange.minX < extentTileRange.minX ||
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tileRange.maxX > extentTileRange.maxX) {
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if (testTileRange.intersects(new ol.TileRange(
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goog.math.modulo(tileRange.minX, width),
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goog.math.modulo(tileRange.maxX, width),
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tileRange.minY, tileRange.maxY))) {
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return true;
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}
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if (tileRange.getWidth() > width &&
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testTileRange.intersects(extentTileRange)) {
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return true;
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}
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}
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}
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}
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return false;
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};
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