protected override WmsParams ValidateParams(IContextRequest request, int targetSrid)
{
WmsParams @params = ValidateCommons(request, targetSrid);
// code specific for GetMap
Color backColor;
bool transparent = String.Equals(request.GetParam("TRANSPARENT"), "TRUE", Case);
if (!transparent)
{
string bgcolor = request.GetParam("BGCOLOR");
if (bgcolor != null)
{
try { backColor = ColorTranslator.FromHtml(bgcolor); }
catch
{
string s = String.Format("Invalid parameter BGCOLOR: {0}", bgcolor);
throw new WmsInvalidParameterException(s);
}
}
else
{
backColor = Color.White;
}
}
else
{
backColor = Color.Transparent;
}
@params.BackColor = backColor;
return(@params);
}
private Size GetSize(WmsParams @params)
{
if (Description.MaxWidth > 0 && @params.Width > Description.MaxWidth)
{
throw new WmsOperationNotSupportedException("Parameter WIDTH too large");
}
if (Description.MaxHeight > 0 && @params.Height > Description.MaxHeight)
{
throw new WmsOperationNotSupportedException("Parameter HEIGHT too large");
}
return(new Size(@params.Width, @params.Height));
}
public override IHandlerResponse Handle(Map map, IContextRequest request)
{
WmsParams @params = ValidateParams(request, TargetSrid(map));
map.Size = new Size(@params.Width, @params.Height);
map.ZoomToBox(@params.BBOX);
string[] requestLayers = @params.QueryLayers.Split(new[] { ',' });
AbstractGetFeatureInfoResponse info = CreateFeatureInfo(map,
requestLayers,
@params.X, @params.Y,
@params.FeatureCount,
@params.CqlFilter,
_params.PixelSensitivity,
_params.IntersectDelegate);
if (_params.Encoding != null)
info.Charset = _params.Encoding.WebName;
return info;
}
protected override WmsParams ValidateParams(IContextRequest request, int targetSrid)
{
WmsParams @params = ValidateCommons(request, targetSrid);
// code specific for GetFeatureInfo
string queryLayers = request.GetParam("QUERY_LAYERS");
if (queryLayers == null)
throw new WmsParameterNotSpecifiedException("QUERY_LAYERS");
@params.QueryLayers = queryLayers;
string infoFormat = request.GetParam("INFO_FORMAT");
if (infoFormat == null)
throw new WmsParameterNotSpecifiedException("INFO_FORMAT");
@params.InfoFormat = infoFormat;
// parameters X&Y are not part of the 1.3.0 specification,
// but are included for backwards compatability with 1.1.1
// (OpenLayers likes it when used together with wms1.1.1 services)
// we will assume that Openlayers is used by default
// so check X&Y first
string x = request.GetParam("X") ?? request.GetParam("I");
if (x == null)
throw new WmsParameterNotSpecifiedException("I");
string y = request.GetParam("Y") ?? request.GetParam("J");
if (y == null)
throw new WmsParameterNotSpecifiedException("J");
float cx;
if (!Single.TryParse(x, out cx))
throw new WmsInvalidParameterException("Invalid parameters for X / I");
@params.X = cx;
float cy;
if (!Single.TryParse(y, out cy))
throw new WmsInvalidParameterException("Invalid parameters for Y / J");
@params.Y = cy;
string featureCount = request.GetParam("FEATURE_COUNT");
int fc = Int32.TryParse(featureCount, out fc) ? Math.Max(fc, 1) : 1;
@params.FeatureCount = fc;
return @params;
}
public override IHandlerResponse Handle(Map map, IContextRequest request)
{
WmsParams @params = ValidateParams(request, TargetSrid(map));
map.BackColor = @params.BackColor;
// get the image format requested
ImageCodecInfo imageEncoder = GetEncoderInfo(@params.Format);
Size size = GetSize(@params);
map.Size = size;
Envelope bbox = @params.BBOX;
double sizeRatio = size.Width / (double)size.Height;
double bboxRatio = bbox.Width / bbox.Height;
map.PixelAspectRatio = sizeRatio / bboxRatio;
map.Center = bbox.Centre;
map.Zoom = bbox.Width;
// set Styles for layerNames
// first, if the request == STYLES=, set all the vectorlayers with Themes not null the Theme to the first theme from Themes
string ptheme = @params.Styles;
string players = @params.Layers;
string cqlFilter = @params.CqlFilter;
if (!String.IsNullOrEmpty(players))
{
string[] layerNames = GetLayerNames(map, players);
// we have a known set of layerNames in request
// so we will set each layer to its default theme
// and disable the layer, layers will be enabled
// later as per the request
foreach (ILayer layer in map.Layers)
{
VectorLayer vectorLayer = layer as VectorLayer;
SetDefaultThemeForLayer(vectorLayer);
layer.Enabled = false;
}
Dictionary <string, string> themeTable = new Dictionary <string, string>();
BuildThemeLookup(ptheme, layerNames, themeTable);
// since we have layerNames specified
// enable only those layerNames
for (int j = 0; j < layerNames.Length; j++)
{
string layerName = layerNames[j];
ILayer layer = GetMapLayerByName(map, layerName);
// set layer on/off
layer.Enabled = true;
// check if a styles have been specified for layers
if (themeTable.Count > 0)
{
string themeName = themeTable[layerName];
// do nothing if themeName is empty
if (!string.IsNullOrEmpty(themeName))
{
// is this a vector layer at all
VectorLayer vectorLayer = layer as VectorLayer;
// does it have several themes to choose from
// TODO -> Refactor VectorLayer.Themes to Rendering.Thematics.ThemeList : ITheme
if (vectorLayer != null && vectorLayer.Themes != null && vectorLayer.Themes.Count > 0)
{
// we need to a case invariant comparison for themeName
Dictionary <string, ITheme> themeDict = new Dictionary <string, ITheme>(vectorLayer.Themes, new StringComparerIgnoreCase());
if (!themeDict.ContainsKey(themeName))
{
throw new WmsStyleNotDefinedException("Style not advertised for this layer");
}
vectorLayer.Theme = themeDict[themeName];
}
}
}
if (!String.IsNullOrEmpty(cqlFilter))
{
ApplyCqlFilter(cqlFilter, layer);
}
}
}
// render map
Image img = map.GetMap();
return(new GetMapResponse(img, imageEncoder));
}
private Size GetSize(WmsParams @params)
{
if (Description.MaxWidth > 0 && @params.Width > Description.MaxWidth)
throw new WmsOperationNotSupportedException("Parameter WIDTH too large");
if (Description.MaxHeight > 0 && @params.Height > Description.MaxHeight)
throw new WmsOperationNotSupportedException("Parameter HEIGHT too large");
return new Size(@params.Width, @params.Height);
}
