Imports cased like the filename
This commit is contained in:
Tim Schaub
270
src/ol/source/ImageArcGISRest.js
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270
src/ol/source/ImageArcGISRest.js
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goog.provide('ol.source.ImageArcGISRest');
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goog.require('ol');
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goog.require('ol.Image');
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goog.require('ol.asserts');
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goog.require('ol.events');
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goog.require('ol.events.EventType');
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goog.require('ol.extent');
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goog.require('ol.obj');
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goog.require('ol.source.Image');
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goog.require('ol.uri');
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/**
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* @classdesc
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* Source for data from ArcGIS Rest services providing single, untiled images.
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* Useful when underlying map service has labels.
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*
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* If underlying map service is not using labels,
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* take advantage of ol image caching and use
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* {@link ol.source.TileArcGISRest} data source.
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*
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* @constructor
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* @fires ol.source.Image.Event
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* @extends {ol.source.Image}
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* @param {olx.source.ImageArcGISRestOptions=} opt_options Image ArcGIS Rest Options.
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* @api
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*/
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ol.source.ImageArcGISRest = function(opt_options) {
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var options = opt_options || {};
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ol.source.Image.call(this, {
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attributions: options.attributions,
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logo: options.logo,
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projection: options.projection,
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resolutions: options.resolutions
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});
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/**
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* @private
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* @type {?string}
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*/
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this.crossOrigin_ =
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options.crossOrigin !== undefined ? options.crossOrigin : null;
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/**
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* @private
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* @type {boolean}
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*/
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this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;
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/**
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* @private
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* @type {string|undefined}
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*/
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this.url_ = options.url;
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/**
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* @private
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* @type {ol.ImageLoadFunctionType}
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*/
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this.imageLoadFunction_ = options.imageLoadFunction !== undefined ?
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options.imageLoadFunction : ol.source.Image.defaultImageLoadFunction;
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/**
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* @private
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* @type {!Object}
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*/
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this.params_ = options.params || {};
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/**
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* @private
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* @type {ol.Image}
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*/
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this.image_ = null;
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/**
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* @private
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* @type {ol.Size}
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*/
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this.imageSize_ = [0, 0];
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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 {number}
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*/
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this.ratio_ = options.ratio !== undefined ? options.ratio : 1.5;
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};
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ol.inherits(ol.source.ImageArcGISRest, ol.source.Image);
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/**
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* Get the user-provided params, i.e. those passed to the constructor through
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* the "params" option, and possibly updated using the updateParams method.
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* @return {Object} Params.
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* @api
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*/
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ol.source.ImageArcGISRest.prototype.getParams = function() {
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return this.params_;
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};
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/**
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* @inheritDoc
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*/
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ol.source.ImageArcGISRest.prototype.getImageInternal = function(extent, resolution, pixelRatio, projection) {
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if (this.url_ === undefined) {
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return null;
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}
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resolution = this.findNearestResolution(resolution);
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pixelRatio = this.hidpi_ ? pixelRatio : 1;
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var image = this.image_;
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if (image &&
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this.renderedRevision_ == this.getRevision() &&
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image.getResolution() == resolution &&
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image.getPixelRatio() == pixelRatio &&
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ol.extent.containsExtent(image.getExtent(), extent)) {
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return image;
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}
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var params = {
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'F': 'image',
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'FORMAT': 'PNG32',
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'TRANSPARENT': true
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};
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ol.obj.assign(params, this.params_);
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extent = extent.slice();
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var centerX = (extent[0] + extent[2]) / 2;
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var centerY = (extent[1] + extent[3]) / 2;
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if (this.ratio_ != 1) {
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var halfWidth = this.ratio_ * ol.extent.getWidth(extent) / 2;
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var halfHeight = this.ratio_ * ol.extent.getHeight(extent) / 2;
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extent[0] = centerX - halfWidth;
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extent[1] = centerY - halfHeight;
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extent[2] = centerX + halfWidth;
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extent[3] = centerY + halfHeight;
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}
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var imageResolution = resolution / pixelRatio;
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// Compute an integer width and height.
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var width = Math.ceil(ol.extent.getWidth(extent) / imageResolution);
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var height = Math.ceil(ol.extent.getHeight(extent) / imageResolution);
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// Modify the extent to match the integer width and height.
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extent[0] = centerX - imageResolution * width / 2;
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extent[2] = centerX + imageResolution * width / 2;
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extent[1] = centerY - imageResolution * height / 2;
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extent[3] = centerY + imageResolution * height / 2;
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this.imageSize_[0] = width;
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this.imageSize_[1] = height;
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var url = this.getRequestUrl_(extent, this.imageSize_, pixelRatio,
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projection, params);
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this.image_ = new ol.Image(extent, resolution, pixelRatio,
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url, this.crossOrigin_, this.imageLoadFunction_);
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this.renderedRevision_ = this.getRevision();
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ol.events.listen(this.image_, ol.events.EventType.CHANGE,
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this.handleImageChange, this);
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return this.image_;
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};
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/**
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* Return the image load function of the source.
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* @return {ol.ImageLoadFunctionType} The image load function.
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* @api
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*/
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ol.source.ImageArcGISRest.prototype.getImageLoadFunction = function() {
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return this.imageLoadFunction_;
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};
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/**
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* @param {ol.Extent} extent Extent.
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* @param {ol.Size} size Size.
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* @param {number} pixelRatio Pixel ratio.
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* @param {ol.proj.Projection} projection Projection.
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* @param {Object} params Params.
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* @return {string} Request URL.
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* @private
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*/
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ol.source.ImageArcGISRest.prototype.getRequestUrl_ = function(extent, size, pixelRatio, projection, params) {
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// ArcGIS Server only wants the numeric portion of the projection ID.
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var srid = projection.getCode().split(':').pop();
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params['SIZE'] = size[0] + ',' + size[1];
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params['BBOX'] = extent.join(',');
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params['BBOXSR'] = srid;
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params['IMAGESR'] = srid;
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params['DPI'] = Math.round(90 * pixelRatio);
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var url = this.url_;
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var modifiedUrl = url
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.replace(/MapServer\/?$/, 'MapServer/export')
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.replace(/ImageServer\/?$/, 'ImageServer/exportImage');
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if (modifiedUrl == url) {
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ol.asserts.assert(false, 50); // `options.featureTypes` should be an Array
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}
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return ol.uri.appendParams(modifiedUrl, params);
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};
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/**
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* Return the URL used for this ArcGIS source.
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* @return {string|undefined} URL.
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* @api
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*/
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ol.source.ImageArcGISRest.prototype.getUrl = function() {
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return this.url_;
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};
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/**
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* Set the image load function of the source.
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* @param {ol.ImageLoadFunctionType} imageLoadFunction Image load function.
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* @api
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*/
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ol.source.ImageArcGISRest.prototype.setImageLoadFunction = function(imageLoadFunction) {
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this.image_ = null;
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this.imageLoadFunction_ = imageLoadFunction;
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this.changed();
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};
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/**
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* Set the URL to use for requests.
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* @param {string|undefined} url URL.
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* @api
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*/
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ol.source.ImageArcGISRest.prototype.setUrl = function(url) {
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if (url != this.url_) {
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this.url_ = url;
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this.image_ = null;
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this.changed();
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}
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};
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/**
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* Update the user-provided params.
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* @param {Object} params Params.
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* @api
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*/
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ol.source.ImageArcGISRest.prototype.updateParams = function(params) {
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ol.obj.assign(this.params_, params);
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this.image_ = null;
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this.changed();
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};
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