Imports cased like the filename
This commit is contained in:
Tim Schaub
240
src/ol/source/ImageMapGuide.js
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240
src/ol/source/ImageMapGuide.js
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goog.provide('ol.source.ImageMapGuide');
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goog.require('ol');
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goog.require('ol.Image');
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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 images from Mapguide servers
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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.ImageMapGuideOptions} options Options.
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* @api
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*/
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ol.source.ImageMapGuide = function(options) {
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ol.source.Image.call(this, {
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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 {number}
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*/
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this.displayDpi_ = options.displayDpi !== undefined ?
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options.displayDpi : 96;
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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 {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 {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 {number}
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*/
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this.metersPerUnit_ = options.metersPerUnit !== undefined ?
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options.metersPerUnit : 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.ratio_ = options.ratio !== undefined ? options.ratio : 1;
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/**
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* @private
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* @type {boolean}
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*/
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this.useOverlay_ = options.useOverlay !== undefined ?
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options.useOverlay : false;
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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 {number}
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*/
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this.renderedRevision_ = 0;
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};
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ol.inherits(ol.source.ImageMapGuide, 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.ImageMapGuide.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.ImageMapGuide.prototype.getImageInternal = function(extent, resolution, pixelRatio, projection) {
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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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if (this.ratio_ != 1) {
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extent = extent.slice();
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ol.extent.scaleFromCenter(extent, this.ratio_);
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}
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var width = ol.extent.getWidth(extent) / resolution;
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var height = ol.extent.getHeight(extent) / resolution;
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var size = [width * pixelRatio, height * pixelRatio];
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if (this.url_ !== undefined) {
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var imageUrl = this.getUrl(this.url_, this.params_, extent, size,
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projection);
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image = new ol.Image(extent, resolution, pixelRatio,
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imageUrl, this.crossOrigin_,
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this.imageLoadFunction_);
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ol.events.listen(image, ol.events.EventType.CHANGE,
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this.handleImageChange, this);
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} else {
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image = null;
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}
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this.image_ = image;
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this.renderedRevision_ = this.getRevision();
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return 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.ImageMapGuide.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 The map extents.
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* @param {ol.Size} size The viewport size.
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* @param {number} metersPerUnit The meters-per-unit value.
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* @param {number} dpi The display resolution.
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* @return {number} The computed map scale.
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*/
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ol.source.ImageMapGuide.getScale = function(extent, size, metersPerUnit, dpi) {
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var mcsW = ol.extent.getWidth(extent);
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var mcsH = ol.extent.getHeight(extent);
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var devW = size[0];
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var devH = size[1];
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var mpp = 0.0254 / dpi;
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if (devH * mcsW > devW * mcsH) {
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return mcsW * metersPerUnit / (devW * mpp); // width limited
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} else {
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return mcsH * metersPerUnit / (devH * mpp); // height limited
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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.ImageMapGuide.prototype.updateParams = function(params) {
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ol.obj.assign(this.params_, params);
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this.changed();
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};
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/**
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* @param {string} baseUrl The mapagent url.
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* @param {Object.<string, string|number>} params Request parameters.
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* @param {ol.Extent} extent Extent.
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* @param {ol.Size} size Size.
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* @param {ol.proj.Projection} projection Projection.
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* @return {string} The mapagent map image request URL.
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*/
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ol.source.ImageMapGuide.prototype.getUrl = function(baseUrl, params, extent, size, projection) {
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var scale = ol.source.ImageMapGuide.getScale(extent, size,
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this.metersPerUnit_, this.displayDpi_);
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var center = ol.extent.getCenter(extent);
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var baseParams = {
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'OPERATION': this.useOverlay_ ? 'GETDYNAMICMAPOVERLAYIMAGE' : 'GETMAPIMAGE',
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'VERSION': '2.0.0',
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'LOCALE': 'en',
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'CLIENTAGENT': 'ol.source.ImageMapGuide source',
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'CLIP': '1',
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'SETDISPLAYDPI': this.displayDpi_,
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'SETDISPLAYWIDTH': Math.round(size[0]),
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'SETDISPLAYHEIGHT': Math.round(size[1]),
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'SETVIEWSCALE': scale,
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'SETVIEWCENTERX': center[0],
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'SETVIEWCENTERY': center[1]
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};
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ol.obj.assign(baseParams, params);
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return ol.uri.appendParams(baseUrl, baseParams);
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};
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/**
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* Set the image load function of the MapGuide 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.ImageMapGuide.prototype.setImageLoadFunction = function(
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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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