cbc4f4e422
minScale and maxScale values of 0 and Infinity do not make sense in OpenLayers, but they are used in WMS GetCapabilities 1.1.1 to indicate that there is no minScale or maxScale restriction. Assuming that the capability values for minScale and maxScale are passed as config options to a WMS layer, it is better to not set minScale and maxScale when 0 or Infinity are found in the ScaleHint.
123 lines
5.1 KiB
JavaScript
123 lines
5.1 KiB
JavaScript
/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for
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* full list of contributors). Published under the 2-clause BSD license.
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* See license.txt in the OpenLayers distribution or repository for the
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* full text of the license. */
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/**
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* @requires OpenLayers/Format/WMSCapabilities/v1.js
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*/
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/**
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* Class: OpenLayers.Format.WMSCapabilities.v1_1
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* Abstract class not to be instantiated directly.
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*
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* Inherits from:
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* - <OpenLayers.Format.WMSCapabilities.v1>
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*/
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OpenLayers.Format.WMSCapabilities.v1_1 = OpenLayers.Class(
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OpenLayers.Format.WMSCapabilities.v1, {
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/**
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* Property: readers
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* Contains public functions, grouped by namespace prefix, that will
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* be applied when a namespaced node is found matching the function
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* name. The function will be applied in the scope of this parser
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* with two arguments: the node being read and a context object passed
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* from the parent.
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*/
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readers: {
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"wms": OpenLayers.Util.applyDefaults({
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"WMT_MS_Capabilities": function(node, obj) {
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this.readChildNodes(node, obj);
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},
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"Keyword": function(node, obj) {
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if (obj.keywords) {
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obj.keywords.push(this.getChildValue(node));
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}
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},
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"DescribeLayer": function(node, obj) {
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obj.describelayer = {formats: []};
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this.readChildNodes(node, obj.describelayer);
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},
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"GetLegendGraphic": function(node, obj) {
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obj.getlegendgraphic = {formats: []};
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this.readChildNodes(node, obj.getlegendgraphic);
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},
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"GetStyles": function(node, obj) {
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obj.getstyles = {formats: []};
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this.readChildNodes(node, obj.getstyles);
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},
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"PutStyles": function(node, obj) {
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obj.putstyles = {formats: []};
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this.readChildNodes(node, obj.putstyles);
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},
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"UserDefinedSymbolization": function(node, obj) {
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var userSymbols = {
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supportSLD: parseInt(node.getAttribute("SupportSLD")) == 1,
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userLayer: parseInt(node.getAttribute("UserLayer")) == 1,
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userStyle: parseInt(node.getAttribute("UserStyle")) == 1,
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remoteWFS: parseInt(node.getAttribute("RemoteWFS")) == 1
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};
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obj.userSymbols = userSymbols;
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},
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"LatLonBoundingBox": function(node, obj) {
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obj.llbbox = [
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parseFloat(node.getAttribute("minx")),
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parseFloat(node.getAttribute("miny")),
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parseFloat(node.getAttribute("maxx")),
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parseFloat(node.getAttribute("maxy"))
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];
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},
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"BoundingBox": function(node, obj) {
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var bbox = OpenLayers.Format.WMSCapabilities.v1.prototype.readers["wms"].BoundingBox.apply(this, [node, obj]);
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bbox.srs = node.getAttribute("SRS");
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obj.bbox[bbox.srs] = bbox;
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},
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"ScaleHint": function(node, obj) {
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var min = node.getAttribute("min");
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var max = node.getAttribute("max");
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var rad2 = Math.pow(2, 0.5);
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var ipm = OpenLayers.INCHES_PER_UNIT["m"];
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if (min != 0) {
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obj.maxScale = parseFloat(
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((min / rad2) * ipm *
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OpenLayers.DOTS_PER_INCH).toPrecision(13)
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);
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}
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if (max != Number.POSITIVE_INFINITY) {
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obj.minScale = parseFloat(
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((max / rad2) * ipm *
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OpenLayers.DOTS_PER_INCH).toPrecision(13)
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);
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}
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},
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"Dimension": function(node, obj) {
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var name = node.getAttribute("name").toLowerCase();
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var dim = {
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name: name,
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units: node.getAttribute("units"),
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unitsymbol: node.getAttribute("unitSymbol")
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};
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obj.dimensions[dim.name] = dim;
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},
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"Extent": function(node, obj) {
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var name = node.getAttribute("name").toLowerCase();
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if (name in obj["dimensions"]) {
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var extent = obj.dimensions[name];
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extent.nearestVal =
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node.getAttribute("nearestValue") === "1";
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extent.multipleVal =
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node.getAttribute("multipleValues") === "1";
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extent.current = node.getAttribute("current") === "1";
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extent["default"] = node.getAttribute("default") || "";
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var values = this.getChildValue(node);
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extent.values = values.split(",");
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}
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}
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}, OpenLayers.Format.WMSCapabilities.v1.prototype.readers["wms"])
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},
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CLASS_NAME: "OpenLayers.Format.WMSCapabilities.v1_1"
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});
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