Metacat

<?xml version="1.0" encoding="ISO-8859-1"?>

<!--

Description: parses an OGC context document to generate a GetFeatureInfo url

Author:      Nedjo

Licence:     LGPL as specified in http://www.gnu.org/copyleft/lesser.html .

$Id$

$Name$

-->

<xsl:stylesheet version="1.0" xmlns:wmc="http://www.opengis.net/context" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xlink="http://www.w3.org/1999/xlink">

  <xsl:output method="xml"/>

  <xsl:strip-space elements="*"/>

  <!-- parameters to be passed into the XSL -->

  <!-- The name of the WMS GetFeatureInfo layer -->

  <xsl:param name="queryLayer">highways</xsl:param>

  <xsl:param name="xCoord">1</xsl:param>

  <xsl:param name="yCoord">1</xsl:param>

  <xsl:param name="infoFormat">text/html</xsl:param>

  <xsl:param name="featureCount">1</xsl:param>

  <!-- Global variables -->

  <xsl:variable name="bbox">

    <xsl:value-of select="/wmc:ViewContext/wmc:General/wmc:BoundingBox/@minx"/>,<xsl:value-of select="/wmc:ViewContext/wmc:General/wmc:BoundingBox/@miny"/>,<xsl:value-of select="/wmc:ViewContext/wmc:General/wmc:BoundingBox/@maxx"/>,<xsl:value-of select="/wmc:ViewContext/wmc:General/wmc:BoundingBox/@maxy"/>

  </xsl:variable>

  <xsl:variable name="width">

    <xsl:value-of select="/wmc:ViewContext/wmc:General/wmc:Window/@width"/>

  </xsl:variable>

  <xsl:variable name="height">

    <xsl:value-of select="/wmc:ViewContext/wmc:General/wmc:Window/@height"/>

  </xsl:variable>

  <xsl:variable name="srs" select="/wmc:ViewContext/wmc:General/wmc:BoundingBox/@SRS"/>

  <!-- Root template -->

  <xsl:template match="/">

    <url>

      <xsl:apply-templates select="wmc:ViewContext/wmc:LayerList"/>

      <error>URL not calculated for layer=<xsl:value-of select="$queryLayer"/></error>

    </url>

  </xsl:template>

  <!-- Layer template -->

  <xsl:template match="wmc:Layer">

    <xsl:if test="contains($queryLayer,wmc:Name)">

      <!-- Layer variables -->

      <xsl:variable name="version">

        <xsl:value-of select="wmc:Server/@version"/>    

      </xsl:variable>

      <xsl:variable name="baseUrl">

        <xsl:value-of select="wmc:Server/wmc:OnlineResource/@xlink:href"/>    

      </xsl:variable>

      <xsl:variable name="firstJoin">

        <xsl:choose>

          <xsl:when test="substring($baseUrl,string-length($baseUrl))='?'"></xsl:when>

          <xsl:when test="contains($baseUrl, '?')">&amp;</xsl:when> 

          <xsl:otherwise>?</xsl:otherwise>

        </xsl:choose>

      </xsl:variable>

      <!-- Print the URL -->

      <xsl:value-of select="$baseUrl"/><xsl:value-of select="$firstJoin"/>VERSION=<xsl:value-of select="$version"/>&amp;REQUEST=GetFeatureInfo&amp;LAYERS=<xsl:value-of select="$queryLayer"/>&amp;SRS=<xsl:value-of select="$srs"/>&amp;BBOX=<xsl:value-of select="$bbox"/>&amp;WIDTH=<xsl:value-of select="$width"/>&amp;HEIGHT=<xsl:value-of select="$height"/>&amp;INFO_FORMAT=<xsl:value-of select="$infoFormat"/>&amp;FEATURE_COUNT=<xsl:value-of select="$featureCount"/>&amp;QUERY_LAYERS=<xsl:value-of select="$queryLayer"/>&amp;X=<xsl:value-of select="$xCoord"/>&amp;Y=<xsl:value-of select="$yCoord"/>&amp;FORMAT

    </xsl:if>

  </xsl:template>

</xsl:stylesheet>