diff -r 8d58b930d36e -r 84b123918d3f sysdeftools/filter-module.xsl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sysdeftools/filter-module.xsl	Tue Apr 06 10:25:29 2010 +0100
@@ -0,0 +1,123 @@
+<?xml version="1.0"?>
+<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:exslt="http://exslt.org/common"  exclude-result-prefixes="exslt">
+<!--Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+	All rights reserved.
+	This component and the accompanying materials are made available
+	under the terms of the License "Eclipse Public License v1.0"
+	which accompanies this distribution, and is available
+	at the URL "http://www.eclipse.org/legal/epl-v10.html".
+
+	Initial Contributors:
+	Nokia Corporation - initial contribution.
+	Contributors:
+	Description:
+	XSLT module which contains the logic to process the filter attribute in the system definition
+-->
+	<xsl:output method="xml" indent="yes"/>
+
+
+<!-- filters can only return hide or show -->
+
+<!-- filter-only =  item's @filter can only have items from the list
+	anything with no filters passes
+-->
+<xsl:template match="filter-only" mode="filter"><xsl:param name="item"/>
+	<xsl:if test="$item[@filter]">
+		<xsl:variable name="this" select="."/>
+		<xsl:variable name="my-filters">
+			<xsl:call-template name="filter-list">
+				<xsl:with-param name="f" select="$item/parent::component/@filter"/>
+			</xsl:call-template>
+			<xsl:call-template name="filter-list">
+				<xsl:with-param name="f" select="$item/@filter"/>
+			</xsl:call-template>
+		</xsl:variable>
+		<xsl:variable name="match">
+			<xsl:for-each select="exslt:node-set($my-filters)/*">
+				<xsl:if test="not($this/*[name()=name(current())  and @v=current()/@v])">x</xsl:if>
+			</xsl:for-each>
+		</xsl:variable>
+		<xsl:if test="$match!=''">hide</xsl:if>
+	</xsl:if>
+</xsl:template>
+
+
+
+<!-- filter-has =  item's @filter must have all filters in the list. ie it can have any other filters, but these must all be present	
+-->
+<xsl:template match="filter-has" mode="filter"><xsl:param name="item"/>
+	<xsl:if test="$item[(self::component or self::unit)  and not(unit/@filter or self::unit[not(../unit[@filter])])]">
+		<xsl:variable name="my-filters">
+			<xsl:call-template name="filter-list">
+				<xsl:with-param name="f" select="$item/parent::component/@filter"/>
+			</xsl:call-template>
+			<xsl:call-template name="filter-list">
+				<xsl:with-param name="f" select="$item/@filter"/>
+			</xsl:call-template>
+		</xsl:variable>
+		<xsl:variable name="match">
+			<xsl:for-each select="*">
+				<!-- 	if(f in this) {return true}  else if(!f in this) {return false} else {return !(f is positive)} -->
+				<xsl:choose>
+					<xsl:when test="exslt:node-set($my-filters)/*[name()=name(current()) and @v=current()/@v]"/> <!-- filter in item -->
+					<xsl:when test="exslt:node-set($my-filters)/*[name()!=name(current()) and @v=current()/@v]">x</xsl:when> <!-- !filter in item -->
+					<xsl:when test="self::filter">x</xsl:when> <!-- !(filter is positive) -->
+				</xsl:choose>
+			</xsl:for-each>
+		</xsl:variable>
+		<xsl:if test="$match!=''">hide</xsl:if>
+	</xsl:if>
+</xsl:template>
+
+<xsl:template match="filter-with" mode="filter"><xsl:param name="item"/>
+	<xsl:if test="$item[(self::component or self::unit)  and not(unit/@filter or self::unit[not(../unit[@filter])])]">
+		<xsl:variable name="my-filters">
+			<xsl:call-template name="filter-list">
+				<xsl:with-param name="f" select="$item/parent::component/@filter"/>
+			</xsl:call-template>
+			<xsl:call-template name="filter-list">
+				<xsl:with-param name="f" select="$item/@filter"/>
+			</xsl:call-template>
+		</xsl:variable>
+		<xsl:variable name="match">
+			<xsl:for-each select="*">
+				<xsl:if test="exslt:node-set($my-filters)/*[name()!=name(current()) and @v=current()/@v]">x</xsl:if> <!-- !filter in item -->
+			</xsl:for-each>
+		</xsl:variable>
+		<xsl:if test="$match!=''">hide</xsl:if>
+	</xsl:if>
+</xsl:template>
+
+
+
+<xsl:template name="filter-item"> <xsl:param name="f"/>
+	<!-- create an element for a given filter. If the filter's empty make nothing -->
+	<xsl:choose>
+		<xsl:when test="$f=''"/>
+		<xsl:when test="starts-with($f,'!')">
+				<not v="{substring($f,2)}"/>
+		</xsl:when>
+		<xsl:otherwise>
+				<filter v="{$f}"/>
+		</xsl:otherwise>
+	</xsl:choose>
+</xsl:template>
+
+<xsl:template name="filter-list"><xsl:param name="f"/>
+	<!-- turn a filter list into a set of elements (<filter> or <not>) with the attribute "v" containing the "absolute value" of the filter
+		filter="A,B,!C" becomes  <filter v="A"/><filter v="B"/><not v="C"/> 
+	  -->
+	<xsl:choose>
+		<xsl:when test="contains($f,',')">
+			<xsl:call-template name="filter-item"><xsl:with-param name="f" select="normalize-space(substring-before($f,','))"/></xsl:call-template>
+			<xsl:call-template name="filter-list">
+				<xsl:with-param name="f" select="substring-after($f,',')"/>
+			</xsl:call-template>
+		</xsl:when>
+		<xsl:otherwise>
+			<xsl:call-template name="filter-item"><xsl:with-param name="f" select="normalize-space($f)"/></xsl:call-template>
+		</xsl:otherwise>
+	</xsl:choose>
+</xsl:template>
+
+</xsl:stylesheet> 
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