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<?xml version="1.0"?>

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<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:exsl="http://exslt.org/common" xmlns:regexp="http://exslt.org/regular-expressions" xmlns:str="http://exslt.org/strings" xmlns:func="http://exslt.org/functions" xmlns:svg="http://www.w3.org/2000/svg" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" version="1.0" extension-element-prefixes="ns func exsl regexp str dyn" exclude-result-prefixes="ns func exsl regexp str dyn svg inkscape">

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  <xsl:output method="xml"/>

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  <xsl:variable name="indexed_hmitree" select="/.."/>

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  <xsl:variable name="pathregex" select="'^(\w+=)?([^,=]+)([-.\d,]*)$'"/>

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  <xsl:variable name="newline">

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    <xsl:text>

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</xsl:text>

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  </xsl:variable>

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  <xsl:variable name="twonewlines" select="concat($newline,$newline)"/>

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  <xsl:template mode="parselabel" match="*">

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    <xsl:variable name="label" select="@inkscape:label"/>

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    <xsl:variable name="desc" select="svg:desc"/>

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    <xsl:variable name="len" select="string-length($label)"/>

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    <xsl:variable name="has_continuation" select="substring($label,$len,1)='\'"/>

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    <xsl:variable name="full_decl">

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      <xsl:choose>

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        <xsl:when test="$has_continuation">

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          <xsl:variable name="_continuation" select="substring-before($desc, $twonewlines)"/>

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          <xsl:variable name="continuation">

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            <xsl:choose>

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              <xsl:when test="$_continuation">

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                <xsl:value-of select="$_continuation"/>

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              </xsl:when>

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              <xsl:otherwise>

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                <xsl:value-of select="$desc"/>

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              </xsl:otherwise>

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            </xsl:choose>

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          </xsl:variable>

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          <xsl:value-of select="concat(substring($label,1,$len - 1),translate($continuation,$newline,''))"/>

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        </xsl:when>

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        <xsl:otherwise>

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          <xsl:value-of select="$label"/>

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        </xsl:otherwise>

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      </xsl:choose>

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    </xsl:variable>

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    <xsl:variable name="id" select="@id"/>

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    <xsl:variable name="declaration" select="substring-after($full_decl,'HMI:')"/>

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    <xsl:variable name="_args" select="substring-before($declaration,'@')"/>

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    <xsl:variable name="args">

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      <xsl:choose>

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        <xsl:when test="$_args">

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          <xsl:value-of select="$_args"/>

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        </xsl:when>

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        <xsl:otherwise>

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          <xsl:value-of select="$declaration"/>

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        </xsl:otherwise>

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      </xsl:choose>

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    </xsl:variable>

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    <xsl:variable name="_typefreq" select="substring-before($args,':')"/>

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    <xsl:variable name="typefreq">

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      <xsl:choose>

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        <xsl:when test="$_typefreq">

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          <xsl:value-of select="$_typefreq"/>

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        </xsl:when>

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        <xsl:otherwise>

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          <xsl:value-of select="$args"/>

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        </xsl:otherwise>

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      </xsl:choose>

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    </xsl:variable>

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    <xsl:variable name="freq" select="substring-after($typefreq,'|')"/>

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    <xsl:variable name="_type" select="substring-before($typefreq,'|')"/>

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    <xsl:variable name="type">

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      <xsl:choose>

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        <xsl:when test="$_type">

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          <xsl:value-of select="$_type"/>

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        </xsl:when>

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        <xsl:otherwise>

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          <xsl:value-of select="$typefreq"/>

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        </xsl:otherwise>

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      </xsl:choose>

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    </xsl:variable>

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    <xsl:if test="$type">

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      <widget>

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        <xsl:attribute name="id">

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          <xsl:value-of select="$id"/>

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        </xsl:attribute>

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        <xsl:attribute name="type">

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          <xsl:value-of select="$type"/>

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        </xsl:attribute>

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        <xsl:if test="$freq">

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          <xsl:if test="not(regexp:test($freq,'^[0-9]*(\.[0-9]+)?[smh]?'))">

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            <xsl:message terminate="yes">

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              <xsl:text>Widget id:</xsl:text>

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              <xsl:value-of select="$id"/>

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              <xsl:text> label:</xsl:text>

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              <xsl:value-of select="$full_decl"/>

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              <xsl:text> has wrong syntax of frequency forcing </xsl:text>

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              <xsl:value-of select="$freq"/>

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            </xsl:message>

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          </xsl:if>

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          <xsl:attribute name="freq">

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            <xsl:value-of select="$freq"/>

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          </xsl:attribute>

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        </xsl:if>

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        <xsl:variable name="tail" select="substring-after($declaration,'@')"/>

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        <xsl:variable name="taillen" select="string-length($tail)"/>

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        <xsl:variable name="has_enable" select="contains($tail, '#')"/>

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        <xsl:variable name="paths">

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          <xsl:choose>

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            <xsl:when test="$has_enable">

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              <xsl:value-of select="substring-before($tail,'#')"/>

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            </xsl:when>

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            <xsl:otherwise>

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              <xsl:value-of select="$tail"/>

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            </xsl:otherwise>

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          </xsl:choose>

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        </xsl:variable>

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        <xsl:if test="$has_enable">

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          <xsl:variable name="enable_expr" select="substring-after($tail,'#')"/>

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          <xsl:attribute name="enable_expr">

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            <xsl:value-of select="$enable_expr"/>

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          </xsl:attribute>

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        </xsl:if>

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        <xsl:for-each select="str:split(substring-after($args, ':'), ':')">

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          <arg>

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            <xsl:attribute name="value">

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              <xsl:value-of select="."/>

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            </xsl:attribute>

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          </arg>

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        </xsl:for-each>

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        <xsl:for-each select="str:split($paths, '@')">

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          <xsl:if test="string-length(.) &gt; 0">

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            <path>

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              <xsl:variable name="path_match" select="regexp:match(.,$pathregex)"/>

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              <xsl:variable name="pathassign" select="substring-before($path_match[2],'=')"/>

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              <xsl:variable name="pathminmax" select="str:split($path_match[4],',')"/>

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              <xsl:variable name="path" select="$path_match[3]"/>

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              <xsl:variable name="pathminmaxcount" select="count($pathminmax)"/>

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              <xsl:if test="not($path)">

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                <xsl:message terminate="yes">

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                  <xsl:text>Widget id:</xsl:text>

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                  <xsl:value-of select="$id"/>

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                  <xsl:text> label:</xsl:text>

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                  <xsl:value-of select="$full_decl"/>

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                  <xsl:text> has wrong syntax</xsl:text>

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                </xsl:message>

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              </xsl:if>

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              <xsl:attribute name="value">

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                <xsl:value-of select="$path"/>

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              </xsl:attribute>

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              <xsl:if test="$pathassign">

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                <xsl:attribute name="assign">

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                  <xsl:value-of select="$pathassign"/>

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                </xsl:attribute>

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              </xsl:if>

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              <xsl:choose>

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                <xsl:when test="$pathminmaxcount = 2">

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                  <xsl:attribute name="min">

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                    <xsl:value-of select="$pathminmax[1]"/>

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                  </xsl:attribute>

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                  <xsl:attribute name="max">

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                    <xsl:value-of select="$pathminmax[2]"/>

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                  </xsl:attribute>

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                </xsl:when>

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                <xsl:when test="$pathminmaxcount = 1 or $pathminmaxcount &gt; 2">

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                  <xsl:message terminate="yes">

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                    <xsl:text>Widget id:</xsl:text>

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                    <xsl:value-of select="$id"/>

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                    <xsl:text> label:</xsl:text>

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                    <xsl:value-of select="$full_decl"/>

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                    <xsl:text> has wrong syntax of path section </xsl:text>

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                    <xsl:value-of select="$pathminmax"/>

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                  </xsl:message>

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                </xsl:when>

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              </xsl:choose>

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              <xsl:if test="$indexed_hmitree">

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                <xsl:choose>

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                  <xsl:when test="regexp:test($path,'^\.[a-zA-Z0-9_]+$')">

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                    <xsl:attribute name="type">

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                      <xsl:text>PAGE_LOCAL</xsl:text>

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                    </xsl:attribute>

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                  </xsl:when>

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                  <xsl:when test="regexp:test($path,'^[a-zA-Z0-9_]+$')">

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                    <xsl:attribute name="type">

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                      <xsl:text>HMI_LOCAL</xsl:text>

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                    </xsl:attribute>

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                  </xsl:when>

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                  <xsl:otherwise>

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                    <xsl:variable name="item" select="$indexed_hmitree/*[@hmipath = $path]"/>

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                    <xsl:variable name="pathtype" select="local-name($item)"/>

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                    <xsl:if test="$pathminmaxcount = 3 and not($pathtype = 'HMI_INT' or $pathtype = 'HMI_REAL')">

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                      <xsl:message terminate="yes">

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                        <xsl:text>Widget id:</xsl:text>

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                        <xsl:value-of select="$id"/>

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                        <xsl:text> label:</xsl:text>

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                        <xsl:value-of select="$full_decl"/>

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                        <xsl:text> path section </xsl:text>

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                        <xsl:value-of select="$pathminmax"/>

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                        <xsl:text> use min and max on non mumeric value</xsl:text>

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                      </xsl:message>

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                    </xsl:if>

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                    <xsl:if test="count($item) = 1">

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                      <xsl:attribute name="index">

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                        <xsl:value-of select="$item/@index"/>

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                      </xsl:attribute>

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                      <xsl:attribute name="type">

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                        <xsl:value-of select="$pathtype"/>

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                      </xsl:attribute>

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                    </xsl:if>

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                  </xsl:otherwise>

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                </xsl:choose>

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              </xsl:if>

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            </path>

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          </xsl:if>

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        </xsl:for-each>

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        <xsl:choose>

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          <xsl:when test="$has_continuation">

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            <xsl:variable name="_continuation" select="substring-after($desc, $twonewlines)"/>

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            <xsl:if test="$_continuation">

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              <desc>

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                <xsl:value-of select="$_continuation"/>

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              </desc>

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            </xsl:if>

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          </xsl:when>

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          <xsl:otherwise>

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            <xsl:if test="$desc">

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              <desc>

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                <xsl:value-of select="$desc/text()"/>

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              </desc>

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            </xsl:if>

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          </xsl:otherwise>

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        </xsl:choose>

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      </widget>

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    </xsl:if>

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  </xsl:template>

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  <xsl:template mode="genlabel" match="arg">

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    <xsl:text>:</xsl:text>

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

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  </xsl:template>

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  <xsl:template mode="genlabel" match="path">

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    <xsl:text>@</xsl:text>

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

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    <xsl:if test="string-length(@min)&gt;0 or string-length(@max)&gt;0">

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      <xsl:text>,</xsl:text>

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      <xsl:value-of select="@min"/>

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      <xsl:text>,</xsl:text>

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      <xsl:value-of select="@max"/>

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    </xsl:if>

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  </xsl:template>

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  <xsl:template mode="genlabel" match="widget">

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    <xsl:text>HMI:</xsl:text>

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    <xsl:value-of select="@type"/>

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    <xsl:apply-templates mode="genlabel" select="arg"/>

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    <xsl:apply-templates mode="genlabel" select="path"/>

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  </xsl:template>

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  <xsl:variable name="hmi_elements" select="//svg:*[starts-with(@inkscape:label, 'HMI:')]"/>

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  <xsl:template match="widget[@type='Assign']" mode="widget_desc">

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    <type>

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      <xsl:value-of select="@type"/>

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    </type>

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    <longdesc>

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      <xsl:text>

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</xsl:text>

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      <xsl:text>Arguments are either:

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</xsl:text>

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      <xsl:text>

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</xsl:text>

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      <xsl:text>- name=value: setting variable with literal value.

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</xsl:text>

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      <xsl:text>- name=other_name: copy variable content into another

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</xsl:text>

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      <xsl:text>

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</xsl:text>

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      <xsl:text>"active"+"inactive" labeled elements can be provided to show feedback when pressed

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</xsl:text>

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      <xsl:text>

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</xsl:text>

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      <xsl:text>Exemples:

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</xsl:text>

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      <xsl:text>

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</xsl:text>

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      <xsl:text>HMI:Assign:notify=1@notify=/PLCVAR

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</xsl:text>

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      <xsl:text>HMI:Assign:ack=2:notify=1@ack=.local_var@notify=/PLCVAR

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</xsl:text>

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      <xsl:text>

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</xsl:text>

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    </longdesc>

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    <shortdesc>

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      <xsl:text>Assign variables on click</xsl:text>

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    </shortdesc>

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  </xsl:template>

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  <xsl:template match="widget[@type='Back']" mode="widget_desc">

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    <type>

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      <xsl:value-of select="@type"/>

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    </type>

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    <longdesc>

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      <xsl:text>Back widget brings focus back to previous page in history when clicked.

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</xsl:text>

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    </longdesc>

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    <shortdesc>

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      <xsl:text>Jump to previous page</xsl:text>

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    </shortdesc>

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  </xsl:template>

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  <xsl:template match="widget[@type='Button']" mode="widget_desc">

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    <type>

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      <xsl:value-of select="@type"/>

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    </type>

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    <longdesc>

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      <xsl:text>Button widget takes one boolean variable path, and reflect current true

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</xsl:text>

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      <xsl:text>or false value by showing "active" or "inactive" labeled element

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</xsl:text>

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      <xsl:text>respectively. Pressing and releasing button changes variable to true and

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</xsl:text>

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      <xsl:text>false respectively. Potential inconsistency caused by quick consecutive

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</xsl:text>

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      <xsl:text>presses on the button is mitigated by using a state machine that wait for

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</xsl:text>

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      <xsl:text>previous state change to be reflected on variable before applying next one.

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</xsl:text>

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    </longdesc>

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    <shortdesc>

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      <xsl:text>Push button reflecting consistently given boolean variable</xsl:text>

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    </shortdesc>

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    <path name="value" accepts="HMI_BOOL">

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      <xsl:text>Boolean variable</xsl:text>

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    </path>

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  </xsl:template>

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  <xsl:template name="generated_button_class">

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    <xsl:param name="fsm"/>

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    <xsl:text>    state = "init";

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</xsl:text>

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    <xsl:text>    dispatch(value) {

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</xsl:text>

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    <xsl:apply-templates mode="dispatch_transition" select="$fsm"/>

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    <xsl:text>    }

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</xsl:text>

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    <xsl:text>    onmouseup(evt) {

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</xsl:text>

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    <xsl:text>        svg_root.removeEventListener("pointerup", this.bound_onmouseup, true);

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</xsl:text>

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    <xsl:apply-templates mode="mouse_transition" select="$fsm">

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      <xsl:with-param name="position" select="'up'"/>

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    </xsl:apply-templates>

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    <xsl:text>    }

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</xsl:text>

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    <xsl:text>    onmousedown(evt) {

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</xsl:text>

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    <xsl:text>        svg_root.addEventListener("pointerup", this.bound_onmouseup, true);

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</xsl:text>

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    <xsl:apply-templates mode="mouse_transition" select="$fsm">

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      <xsl:with-param name="position" select="'down'"/>

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    </xsl:apply-templates>

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    <xsl:text>    }

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</xsl:text>

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    <xsl:apply-templates mode="actions" select="$fsm"/>

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    <xsl:text>    init() {

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</xsl:text>

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    <xsl:text>        this.bound_onmouseup = this.onmouseup.bind(this);

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</xsl:text>

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    <xsl:text>        this.element.addEventListener("pointerdown", this.onmousedown.bind(this));

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</xsl:text>

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    <xsl:text>        this.activity_state = undefined;

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</xsl:text>

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    <xsl:text>    }

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</xsl:text>

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  </xsl:template>

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  <xsl:template match="widget[@type='CircularBar']" mode="widget_desc">

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    <type>

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      <xsl:value-of select="@type"/>

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    </type>

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    <longdesc>

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      <xsl:text>CircularBar widget changes the end angle of a "path" labeled arc according

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</xsl:text>

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      <xsl:text>to value of the single accepted variable.

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</xsl:text>

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      <xsl:text>

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</xsl:text>

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      <xsl:text>If "min" a "max" labeled texts are provided, then they are used as

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</xsl:text>

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      <xsl:text>respective minimum and maximum value. Otherwise, value is expected to be

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</xsl:text>

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      <xsl:text>in between 0 and 100.

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</xsl:text>

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    </longdesc>

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    <shortdesc>

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      <xsl:text>Change end angle of Inkscape's arc</xsl:text>

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    </shortdesc>

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    <arg name="min" count="optional" accepts="int,real">

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      <xsl:text>minimum value</xsl:text>

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    </arg>

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    <arg name="max" count="optional" accepts="int,real">

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      <xsl:text>maximum value</xsl:text>

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    </arg>

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    <path name="value" accepts="HMI_INT,HMI_REAL">

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      <xsl:text>Value to display</xsl:text>

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    </path>

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  </xsl:template>

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  <xsl:template match="widget[@type='CustomHtml']" mode="widget_desc">

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    <type>

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      <xsl:value-of select="@type"/>

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    </type>

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    <longdesc>

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      <xsl:text>CustomHtml widget allows insertion of HTML code in a svg:foreignObject.

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</xsl:text>

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      <xsl:text>Widget content is replaced by foreignObject. HTML code is obtained from

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</xsl:text>

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      <xsl:text>"code" labeled text content. HTML insert position and size is given with

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</xsl:text>

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      <xsl:text>"container" labeled element.

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</xsl:text>

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    </longdesc>

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    <shortdesc>

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      <xsl:text>Custom HTML insert</xsl:text>

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    </shortdesc>

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  </xsl:template>

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  <xsl:template match="widget[@type='Display']" mode="widget_desc">

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    <type>

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      <xsl:value-of select="@type"/>

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    </type>

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    <longdesc>

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      <xsl:text>If Display widget is a svg:text element, then text content is replaced by

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</xsl:text>

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      <xsl:text>value of given variables, space separated.

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</xsl:text>

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      <xsl:text>

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</xsl:text>

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      <xsl:text>Otherwise, if Display widget is a group containing a svg:text element

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</xsl:text>

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      <xsl:text>labelled "format", then text content is replaced by printf-like formated

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</xsl:text>

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      <xsl:text>string. In other words, if "format" labeled text is "%d %s %f", then 3

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</xsl:text>

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      <xsl:text>variables paths are expected : HMI_IN, HMI_STRING and HMI_REAL.

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</xsl:text>

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      <xsl:text>

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</xsl:text>

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      <xsl:text>In case Display widget is a svg::text element, it is also possible to give

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</xsl:text>

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      <xsl:text>format string as first argument.

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</xsl:text>

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    </longdesc>

   435

    <shortdesc>

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      <xsl:text>Printf-like formated text display</xsl:text>

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    </shortdesc>

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    <arg name="format" count="optional" accepts="string">

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      <xsl:text>printf-like format string when not given as svg:text</xsl:text>

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    </arg>

   441

    <path name="fields" count="many" accepts="HMI_INT,HMI_REAL,HMI_STRING,HMI_BOOL">

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      <xsl:text>variables to be displayed</xsl:text>

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    </path>

   444

  </xsl:template>

   445

  <xsl:template match="widget[@type='DropDown']" mode="widget_desc">

   446

    <type>

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      <xsl:value-of select="@type"/>

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    </type>

   449

    <longdesc>

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      <xsl:text>DropDown widget let user select an entry in a list of texts, given as

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</xsl:text>

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      <xsl:text>arguments. Single variable path is index of selection.

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</xsl:text>

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      <xsl:text>

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</xsl:text>

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      <xsl:text>It needs "text" (svg:text or svg:use referring to svg:text),

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</xsl:text>

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      <xsl:text>"box" (svg:rect), "button" (svg:*), and "highlight" (svg:rect)

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</xsl:text>

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      <xsl:text>labeled elements.

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</xsl:text>

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      <xsl:text>

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</xsl:text>

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      <xsl:text>When user clicks on "button", "text" is duplicated to display enties in the

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</xsl:text>

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      <xsl:text>limit of available space in page, and "box" is extended to contain all

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</xsl:text>

   468

      <xsl:text>texts. "highlight" is moved over pre-selected entry.

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</xsl:text>

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      <xsl:text>

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</xsl:text>

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      <xsl:text>When only one argument is given and argment contains "#langs" then list of

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</xsl:text>

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      <xsl:text>texts is automatically set to the human-readable list of supported

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</xsl:text>

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      <xsl:text>languages by this HMI. 

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</xsl:text>

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      <xsl:text>

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</xsl:text>

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      <xsl:text>If "text" labeled element is of type svg:use and refers to a svg:text 

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</xsl:text>

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      <xsl:text>element part of a TextList widget, no argument is expected. In that case

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</xsl:text>

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      <xsl:text>list of texts is set to TextList content.

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</xsl:text>

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    </longdesc>

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    <shortdesc>

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      <xsl:text>Let user select text entry in a drop-down menu</xsl:text>

   489

    </shortdesc>

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    <arg name="entries" count="many" accepts="string">

   491

      <xsl:text>drop-down menu entries</xsl:text>

   492

    </arg>

   493

    <path name="selection" accepts="HMI_INT">

   494

      <xsl:text>selection index</xsl:text>

   495

    </path>

   496

  </xsl:template>

   497

  <xsl:template match="widget[@type='ForEach']" mode="widget_desc">

   498

    <type>

   499

      <xsl:value-of select="@type"/>

   500

    </type>

   501

    <longdesc>