cqfn/eo

<?xml version="1.0" encoding="UTF-8"?>
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<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" xmlns:xs="http://www.w3.org/2001/XMLSchema" id="abstracts-float-up" version="2.0">
  <!--
  Here, we extract abstracts that are nested within other abstracts
  and relocate them to the highest level. Example:

  [a] > foo
    [] > test
      3.14 > pi
      "Hello, world"

  Will change to:

  [] > foo$test
    3.14 > pi
    "Hello, world"
  [a] > foo
    foo$test > test
  -->
  <xsl:import href="/org/eolang/parser/_funcs.xsl"/>
  <xsl:output encoding="UTF-8" method="xml"/>
  <!-- The eo:name-of function generates the name of the object based on its
  ancestors. Example:

  [] > another
    eq. > @
      [] > first
        1 > @
      [] > second
        2 > @

   Will generate the following names:
   eo:name-of(first) = "another$t0$first"
   eo:name-of(second) = "another$t0$second"
  -->
  <xsl:function name="eo:name-of" as="xs:string">
    <xsl:param name="object" as="element()"/>
    <xsl:variable name="name">
      <xsl:for-each select="$object/ancestor-or-self::o">
        <xsl:choose>
          <xsl:when test="eo:abstract(.) and not(@name)">
            <xsl:text>a</xsl:text>
            <xsl:value-of select="count(preceding-sibling::o)"/>
          </xsl:when>
          <xsl:when test="eo:abstract(.)">
            <xsl:value-of select="@name"/>
          </xsl:when>
          <xsl:otherwise>
            <xsl:text>t</xsl:text>
            <xsl:value-of select="count(preceding-sibling::o)"/>
          </xsl:otherwise>
        </xsl:choose>
        <xsl:if test="position() != last()">
          <xsl:text>$</xsl:text>
        </xsl:if>
      </xsl:for-each>
    </xsl:variable>
    <xsl:value-of select="$name"/>
  </xsl:function>
  <!-- Generates pseudo-random integer -->
  <xsl:function name="eo:random-int" as="xs:integer">
    <xsl:variable name="generated">
      <random/>
    </xsl:variable>
    <xsl:value-of select="sum(string-to-codepoints(generate-id($generated//random)))"/>
  </xsl:function>
  <!-- Finds all required attributes -->
  <xsl:function name="eo:vars">
    <xsl:param name="bottom" as="element()"/>
    <xsl:param name="top" as="element()"/>
    <xsl:for-each select="$bottom/ancestor::o[eo:abstract(.)]">
      <xsl:variable name="current-ancestor" select="."/>
      <xsl:if test="$top/descendant-or-self::o[generate-id() = generate-id($current-ancestor)]">
        <xsl:for-each select="$current-ancestor/o[@name and generate-id() != generate-id($bottom)]">
          <xsl:variable name="copied" select="."/>
          <xsl:if test="not($bottom/ancestor-or-self::o[generate-id() = generate-id($copied)]) and $bottom/descendant::o[@base=$copied/@name]">
            <xsl:copy-of select="$copied"/>
          </xsl:if>
        </xsl:for-each>
      </xsl:if>
    </xsl:for-each>
  </xsl:function>
  <xsl:template match="//objects">
    <xsl:copy>
      <xsl:apply-templates select=".//o[eo:abstract(.)]" mode="top"/>
      <xsl:apply-templates select="o[not(eo:abstract(.))]|@*"/>
    </xsl:copy>
  </xsl:template>
  <xsl:template match="node()|@*">
    <xsl:copy>
      <xsl:apply-templates select="node()|@*"/>
    </xsl:copy>
  </xsl:template>
  <xsl:template match="o[eo:abstract(.)]">
    <xsl:element name="o">
      <xsl:apply-templates select="@* except @base except @abstract"/>
      <xsl:attribute name="base">
        <xsl:value-of select="eo:name-of(.)"/>
      </xsl:attribute>
      <xsl:attribute name="ref">
        <xsl:value-of select="@line"/>
      </xsl:attribute>
      <xsl:attribute name="cut">
        <xsl:value-of select="count(preceding::o)"/>
      </xsl:attribute>
      <xsl:variable name="ancestors" select="ancestor-or-self::o[eo:abstract(.)]"/>
      <xsl:for-each select="1 to count($ancestors) - 1">
        <xsl:variable name="index" select="position()"/>
        <xsl:for-each select="eo:vars($ancestors[count($ancestors) - $index + 1], $ancestors[count($ancestors) - $index])">
          <xsl:element name="o">
            <xsl:attribute name="as">
              <xsl:value-of select="@name"/>
            </xsl:attribute>
            <xsl:attribute name="base">
              <xsl:value-of select="@name"/>
            </xsl:attribute>
            <xsl:attribute name="level">
              <xsl:value-of select="$index"/>
            </xsl:attribute>
          </xsl:element>
        </xsl:for-each>
      </xsl:for-each>
    </xsl:element>
  </xsl:template>
  <xsl:template match="o[eo:abstract(.)]" mode="top">
    <xsl:variable name="o" select="."/>
    <xsl:copy>
      <xsl:attribute name="name">
        <xsl:value-of select="eo:name-of(.)"/>
      </xsl:attribute>
      <xsl:if test="@name">
        <xsl:attribute name="original-name">
          <xsl:value-of select="@name"/>
        </xsl:attribute>
      </xsl:if>
      <xsl:variable name="ancestors" select="ancestor-or-self::o[eo:abstract(.)]"/>
      <xsl:if test="count($ancestors) &gt; 1">
        <xsl:attribute name="ancestors">
          <xsl:value-of select="count($ancestors) - 1"/>
        </xsl:attribute>
        <xsl:attribute name="parent">
          <xsl:value-of select="eo:name-of($ancestors[last() - 1])"/>
        </xsl:attribute>
      </xsl:if>
      <xsl:apply-templates select="node()|@* except @name"/>
      <xsl:for-each select="1 to count($ancestors) - 1">
        <xsl:variable name="index" select="position()"/>
        <xsl:for-each select="eo:vars($ancestors[count($ancestors) - $index + 1], $ancestors[count($ancestors) - $index])">
          <xsl:element name="o">
            <xsl:attribute name="name">
              <xsl:value-of select="@name"/>
            </xsl:attribute>
            <xsl:attribute name="level">
              <xsl:value-of select="$index"/>
            </xsl:attribute>
            <xsl:attribute name="line">
              <xsl:value-of select="$o/@line"/>
              <xsl:text>.</xsl:text>
              <xsl:value-of select="@line"/>
              <xsl:text>.</xsl:text>
              <xsl:value-of select="eo:random-int()"/>
            </xsl:attribute>
          </xsl:element>
        </xsl:for-each>
      </xsl:for-each>
    </xsl:copy>
  </xsl:template>
</xsl:stylesheet>