335 lines
12 KiB
JavaScript
335 lines
12 KiB
JavaScript
/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for
|
|
* full list of contributors). Published under the Clear BSD license.
|
|
* See license.txt in the OpenLayers distribution or repository for the
|
|
* full text of the license. */
|
|
|
|
/**
|
|
* @requires OpenLayers/Format/XML/VersionedOGC.js
|
|
*/
|
|
|
|
/**
|
|
* Class: OpenLayers.Format.Context
|
|
* Base class for both Format.WMC and Format.OWSContext
|
|
*
|
|
* Inherits from:
|
|
* - <OpenLayers.Format.XML.VersionedOGC>
|
|
*/
|
|
OpenLayers.Format.Context = OpenLayers.Class(OpenLayers.Format.XML.VersionedOGC, {
|
|
|
|
/**
|
|
* Property: layerOptions
|
|
* {Object} Default options for layers created by the parser. These
|
|
* options are overridden by the options which are read from the
|
|
* capabilities document.
|
|
*/
|
|
layerOptions: null,
|
|
|
|
/**
|
|
* Property: layerParams
|
|
* {Object} Default parameters for layers created by the parser. This
|
|
* can be used e.g. to override DEFAULT_PARAMS for
|
|
* OpenLayers.Layer.WMS.
|
|
*/
|
|
layerParams: null,
|
|
|
|
/**
|
|
* Constructor: OpenLayers.Format.Context
|
|
* Create a new parser for Context documents.
|
|
*
|
|
* Parameters:
|
|
* options - {Object} An optional object whose properties will be set on
|
|
* this instance.
|
|
*/
|
|
|
|
/**
|
|
* APIMethod: read
|
|
* Read Context data from a string, and return an object with map
|
|
* properties and a list of layers.
|
|
*
|
|
* Parameters:
|
|
* data - {String} or {DOMElement} data to read/parse.
|
|
* options - {Object} The options object must contain a map property. If
|
|
* the map property is a string, it must be the id of a dom element
|
|
* where the new map will be placed. If the map property is an
|
|
* <OpenLayers.Map>, the layers from the context document will be added
|
|
* to the map.
|
|
*
|
|
* Returns:
|
|
* {<OpenLayers.Map>} A map based on the context.
|
|
*/
|
|
read: function(data, options) {
|
|
var context = OpenLayers.Format.XML.VersionedOGC.prototype.read.apply(this,
|
|
arguments);
|
|
var map;
|
|
if(options && options.map) {
|
|
this.context = context;
|
|
if(options.map instanceof OpenLayers.Map) {
|
|
map = this.mergeContextToMap(context, options.map);
|
|
} else {
|
|
var mapOptions = options.map;
|
|
if(OpenLayers.Util.isElement(mapOptions) ||
|
|
typeof mapOptions == "string") {
|
|
// we assume mapOptions references a div
|
|
// element
|
|
mapOptions = {div: mapOptions};
|
|
}
|
|
map = this.contextToMap(context, mapOptions);
|
|
}
|
|
} else {
|
|
// not documented as part of the API, provided as a non-API option
|
|
map = context;
|
|
}
|
|
return map;
|
|
},
|
|
|
|
/**
|
|
* Method: getLayerFromContext
|
|
* Create a WMS layer from a layerContext object.
|
|
*
|
|
* Parameters:
|
|
* layerContext - {Object} An object representing a WMS layer.
|
|
*
|
|
* Returns:
|
|
* {<OpenLayers.Layer.WMS>} A WMS layer.
|
|
*/
|
|
getLayerFromContext: function(layerContext) {
|
|
var i, len;
|
|
// fill initial options object from layerContext
|
|
var options = {
|
|
queryable: layerContext.queryable, //keep queryable for api compatibility
|
|
visibility: layerContext.visibility,
|
|
maxExtent: layerContext.maxExtent,
|
|
metadata: OpenLayers.Util.applyDefaults(layerContext.metadata,
|
|
{styles: layerContext.styles,
|
|
formats: layerContext.formats,
|
|
"abstract": layerContext["abstract"],
|
|
dataURL: layerContext.dataURL
|
|
}),
|
|
numZoomLevels: layerContext.numZoomLevels,
|
|
units: layerContext.units,
|
|
isBaseLayer: layerContext.isBaseLayer,
|
|
opacity: layerContext.opacity,
|
|
displayInLayerSwitcher: layerContext.displayInLayerSwitcher,
|
|
singleTile: layerContext.singleTile,
|
|
tileSize: (layerContext.tileSize) ?
|
|
new OpenLayers.Size(
|
|
layerContext.tileSize.width,
|
|
layerContext.tileSize.height
|
|
) : undefined,
|
|
minScale: layerContext.minScale || layerContext.maxScaleDenominator,
|
|
maxScale: layerContext.maxScale || layerContext.minScaleDenominator,
|
|
srs: layerContext.srs,
|
|
dimensions: layerContext.dimensions,
|
|
metadataURL: layerContext.metadataURL
|
|
};
|
|
if (this.layerOptions) {
|
|
OpenLayers.Util.applyDefaults(options, this.layerOptions);
|
|
}
|
|
|
|
var params = {
|
|
layers: layerContext.name,
|
|
transparent: layerContext.transparent,
|
|
version: layerContext.version
|
|
};
|
|
if (layerContext.formats && layerContext.formats.length>0) {
|
|
// set default value for params if current attribute is not positionned
|
|
params.format = layerContext.formats[0].value;
|
|
for (i=0, len=layerContext.formats.length; i<len; i++) {
|
|
var format = layerContext.formats[i];
|
|
if (format.current == true) {
|
|
params.format = format.value;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (layerContext.styles && layerContext.styles.length>0) {
|
|
for (i=0, len=layerContext.styles.length; i<len; i++) {
|
|
var style = layerContext.styles[i];
|
|
if (style.current == true) {
|
|
// three style types to consider
|
|
// 1) linked SLD
|
|
// 2) inline SLD
|
|
// 3) named style
|
|
if(style.href) {
|
|
params.sld = style.href;
|
|
} else if(style.body) {
|
|
params.sld_body = style.body;
|
|
} else {
|
|
params.styles = style.name;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (this.layerParams) {
|
|
OpenLayers.Util.applyDefaults(params, this.layerParams);
|
|
}
|
|
|
|
var layer = null;
|
|
var service = layerContext.service;
|
|
if (service == OpenLayers.Format.Context.serviceTypes.WFS) {
|
|
options.strategies = [new OpenLayers.Strategy.BBOX()];
|
|
options.protocol = new OpenLayers.Protocol.WFS({
|
|
url: layerContext.url,
|
|
// since we do not know featureNS, let the protocol
|
|
// determine it automagically using featurePrefix
|
|
featurePrefix: layerContext.name.split(":")[0],
|
|
featureType: layerContext.name.split(":").pop()
|
|
});
|
|
layer = new OpenLayers.Layer.Vector(
|
|
layerContext.title || layerContext.name,
|
|
options
|
|
);
|
|
} else if (service == OpenLayers.Format.Context.serviceTypes.KML) {
|
|
// use a vector layer with an HTTP Protcol and a Fixed strategy
|
|
options.strategies = [new OpenLayers.Strategy.Fixed()];
|
|
options.protocol = new OpenLayers.Protocol.HTTP({
|
|
url: layerContext.url,
|
|
format: new OpenLayers.Format.KML()
|
|
});
|
|
layer = new OpenLayers.Layer.Vector(
|
|
layerContext.title || layerContext.name,
|
|
options
|
|
);
|
|
} else if (service == OpenLayers.Format.Context.serviceTypes.GML) {
|
|
// use a vector layer with a HTTP Protocol and a Fixed strategy
|
|
options.strategies = [new OpenLayers.Strategy.Fixed()];
|
|
options.protocol = new OpenLayers.Protocol.HTTP({
|
|
url: layerContext.url,
|
|
format: new OpenLayers.Format.GML()
|
|
});
|
|
layer = new OpenLayers.Layer.Vector(
|
|
layerContext.title || layerContext.name,
|
|
options
|
|
);
|
|
} else if (layerContext.features) {
|
|
// inline GML or KML features
|
|
layer = new OpenLayers.Layer.Vector(
|
|
layerContext.title || layerContext.name,
|
|
options
|
|
);
|
|
layer.addFeatures(layerContext.features);
|
|
} else if (layerContext.categoryLayer !== true) {
|
|
layer = new OpenLayers.Layer.WMS(
|
|
layerContext.title || layerContext.name,
|
|
layerContext.url,
|
|
params,
|
|
options
|
|
);
|
|
}
|
|
return layer;
|
|
},
|
|
|
|
/**
|
|
* Method: getLayersFromContext
|
|
* Create an array of layers from an array of layerContext objects.
|
|
*
|
|
* Parameters:
|
|
* layersContext - {Array(Object)} An array of objects representing layers.
|
|
*
|
|
* Returns:
|
|
* {Array(<OpenLayers.Layer>)} An array of layers.
|
|
*/
|
|
getLayersFromContext: function(layersContext) {
|
|
var layers = [];
|
|
for (var i=0, len=layersContext.length; i<len; i++) {
|
|
var layer = this.getLayerFromContext(layersContext[i]);
|
|
if (layer !== null) {
|
|
layers.push(layer);
|
|
}
|
|
}
|
|
return layers;
|
|
},
|
|
|
|
/**
|
|
* Method: contextToMap
|
|
* Create a map given a context object.
|
|
*
|
|
* Parameters:
|
|
* context - {Object} The context object.
|
|
* options - {Object} Default map options.
|
|
*
|
|
* Returns:
|
|
* {<OpenLayers.Map>} A map based on the context object.
|
|
*/
|
|
contextToMap: function(context, options) {
|
|
options = OpenLayers.Util.applyDefaults({
|
|
maxExtent: context.maxExtent,
|
|
projection: context.projection,
|
|
units: context.units
|
|
}, options);
|
|
|
|
if (options.maxExtent) {
|
|
options.maxResolution =
|
|
options.maxExtent.getWidth() / OpenLayers.Map.TILE_WIDTH;
|
|
}
|
|
|
|
var metadata = {
|
|
contactInformation: context.contactInformation,
|
|
"abstract": context["abstract"],
|
|
keywords: context.keywords,
|
|
logo: context.logo,
|
|
descriptionURL: context.descriptionURL
|
|
};
|
|
|
|
options.metadata = metadata;
|
|
|
|
var map = new OpenLayers.Map(options);
|
|
map.addLayers(this.getLayersFromContext(context.layersContext));
|
|
map.setCenter(
|
|
context.bounds.getCenterLonLat(),
|
|
map.getZoomForExtent(context.bounds, true)
|
|
);
|
|
return map;
|
|
},
|
|
|
|
/**
|
|
* Method: mergeContextToMap
|
|
* Add layers from a context object to a map.
|
|
*
|
|
* Parameters:
|
|
* context - {Object} The context object.
|
|
* map - {<OpenLayers.Map>} The map.
|
|
*
|
|
* Returns:
|
|
* {<OpenLayers.Map>} The same map with layers added.
|
|
*/
|
|
mergeContextToMap: function(context, map) {
|
|
map.addLayers(this.getLayersFromContext(context.layersContext));
|
|
return map;
|
|
},
|
|
|
|
/**
|
|
* APIMethod: write
|
|
* Write a context document given a map.
|
|
*
|
|
* Parameters:
|
|
* obj - {<OpenLayers.Map> | Object} A map or context object.
|
|
* options - {Object} Optional configuration object.
|
|
*
|
|
* Returns:
|
|
* {String} A context document string.
|
|
*/
|
|
write: function(obj, options) {
|
|
obj = this.toContext(obj);
|
|
return OpenLayers.Format.XML.VersionedOGC.prototype.write.apply(this,
|
|
arguments);
|
|
},
|
|
|
|
CLASS_NAME: "OpenLayers.Format.Context"
|
|
});
|
|
|
|
/**
|
|
* Constant: OpenLayers.Format.Context.serviceTypes
|
|
* Enumeration for service types
|
|
*/
|
|
OpenLayers.Format.Context.serviceTypes = {
|
|
"WMS": "urn:ogc:serviceType:WMS",
|
|
"WFS": "urn:ogc:serviceType:WFS",
|
|
"WCS": "urn:ogc:serviceType:WCS",
|
|
"GML": "urn:ogc:serviceType:GML",
|
|
"SLD": "urn:ogc:serviceType:SLD",
|
|
"FES": "urn:ogc:serviceType:FES",
|
|
"KML": "urn:ogc:serviceType:KML"
|
|
};
|