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RE: Re: Re: Fixed Line Length Output

2003-12-09 10:07:40
Thanks. Though this is already where I was, except that you simply cut
off the lines and got rid of the rest of the content. And whatever file
you're importing here is not included anywhere.

When I figure out what I'm trying to do, I'll email the list.

Thanks anyway.

Cynthia

-----Original Message-----
From: Dimitre Novatchev [mailto:dnovatchev(_at_)yahoo(_dot_)com] 
Sent: Monday, December 08, 2003 11:05 PM
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Re: Re: Fixed Line Length Output


"Cynthia DeLaria" <cdelaria(_at_)quris(_dot_)com> wrote in message
news:CE54CE22EF3A65438885197A240E408BC5C173(_at_)mx1(_dot_)hq(_dot_)quris(_dot_)com(_dot_)(_dot_)(_dot_)
Hello, all.

Thank you for tackling this subject. I have been wrestling with this 
same thing as I have a templating system that generates text e-mail 
messages where the line length can be no more than 72 characters. This

example has opened up some interesting options as far as how to do 
that with certain pieces...

However, this example assumes that the information gotten from a node 
is never going to be longer than 25 characters (or whatever the 
desired length is). In my case I have movie descriptions that are 
often times 300-400 characters in length, and I need to put 
line-breaks every 72 characters (or where it makes sense to do so). Is

there any way to account for this? Here is example xml:

This was done two years ago -- see e.g:
    http://sources.redhat.com/ml/xsl-list/2001-12/msg00651.html

FXSL contains the "str-split-to-lines" template that solves this class
of problems.

This transformation:

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:ext="http://exslt.org/common";
xmlns:str-split2lines-func="f:str-split2lines-func"
exclude-result-prefixes="xsl ext str-split2lines-func"



   <xsl:import href="dvc-str-foldl.xsl"/>

   <!-- to be applied on text.xml -->

   <str-split2lines-func:str-split2lines-func/>

   <xsl:output indent="yes" omit-xml-declaration="yes"/>
   <xsl:strip-space elements="*"/>

   <xsl:template match="@*|node()">
     <xsl:copy>
       <xsl:apply-templates select="@*|node()"/>
     </xsl:copy>
   </xsl:template>

    <xsl:template match="text()">
      <xsl:value-of select="'&#xA;'"/>
      <xsl:call-template name="str-split-to-lines">
        <xsl:with-param name="pStr" select="."/>
        <xsl:with-param name="pLineLength" select="64"/>
        <xsl:with-param name="pDelimiters" select="' &#9;&#10;&#13;'"/>
      </xsl:call-template>
    </xsl:template>

    <xsl:template name="str-split-to-lines">
      <xsl:param name="pStr"/>
      <xsl:param name="pLineLength" select="60"/>
      <xsl:param name="pDelimiters" select="' &#9;&#10;&#13;'"/>

      <xsl:variable name="vsplit2linesFun"
                    select="document('')/*/str-split2lines-func:*[1]"/>

      <xsl:variable name="vrtfParams">
       <delimiters><xsl:value-of select="$pDelimiters"/></delimiters>
       <lineLength><xsl:copy-of select="$pLineLength"/></lineLength>
      </xsl:variable>

      <xsl:variable name="vResult">
       <xsl:call-template name="dvc-str-foldl">
         <xsl:with-param name="pFunc" select="$vsplit2linesFun"/>
         <xsl:with-param name="pStr" select="$pStr"/>
         <xsl:with-param name="pA0" select="ext:node-set($vrtfParams)"/>
       </xsl:call-template>
      </xsl:variable>

      <xsl:for-each select="ext:node-set($vResult)/line">
        <xsl:for-each select="word">
          <xsl:value-of select="concat(., ' ')"/>
        </xsl:for-each>
        <xsl:value-of select="'&#xA;'"/>
      </xsl:for-each>
    </xsl:template>

    <xsl:template match="str-split2lines-func:*">
      <xsl:param name="arg1" select="/.."/>
      <xsl:param name="arg2"/>

      <xsl:copy-of select="$arg1/*[position() &lt; 3]"/>
      <xsl:copy-of select="$arg1/line[position() != last()]"/>

   <xsl:choose>
     <xsl:when test="contains($arg1/*[1], $arg2)">
       <xsl:if test="string($arg1/word)">
          <xsl:call-template name="fillLine">
            <xsl:with-param name="pLine" select="$arg1/line[last()]"/>
            <xsl:with-param name="pWord" select="$arg1/word"/>
            <xsl:with-param name="pLineLength" select="$arg1/*[2]"/>
          </xsl:call-template>
       </xsl:if>
     </xsl:when>
     <xsl:otherwise>
       <xsl:copy-of select="$arg1/line[last()]"/>
       <word><xsl:value-of select="concat($arg1/word, $arg2)"/></word>
     </xsl:otherwise>
   </xsl:choose>
 </xsl:template>

      <!-- Test if the new word fits into the last line -->
<xsl:template name="fillLine">
      <xsl:param name="pLine" select="/.."/>
      <xsl:param name="pWord" select="/.."/>
      <xsl:param name="pLineLength" />

      <xsl:variable name="vnWordsInLine" select="count($pLine/word)"/>
      <xsl:variable name="vLineLength"
       select="string-length($pLine) + $vnWordsInLine"/>
      <xsl:choose>
        <xsl:when test="not($vLineLength + string-length($pWord)
                           >
                            $pLineLength)">
          <line>
            <xsl:copy-of select="$pLine/*"/>
            <xsl:copy-of select="$pWord"/>
          </line>
        </xsl:when>
        <xsl:otherwise>
          <xsl:copy-of select="$pLine"/>
          <line>
            <xsl:copy-of select="$pWord"/>
          </line>
          <word/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:template>

</xsl:stylesheet>

when applied on your source.xml:

<t>
  <movieDesc>
    <description>They were betrayed by one of their own. Now the next
heist isn't just about money - it's about payback.</description>
    <description>One's an amateur real estate broker. The other's a yoga
instructor. Believe it or not, they're also two of LA's finest
detectives!</description>
    <description>The mild-mannered Jerry has second thoughts about his
daughter's wedding when he meets the groom's outrageous
father!</description>
    <description>Return to the swinging sixties with Renee Zellweger and
Ewan McGregor as they engage in a stylish battle of the
sexes.</description>
    <description>When Willard decides it's time for revenge, his loyal,
furry friends become his own personal army.</description>
    <description>Young friends lost deep in the Appalachian hills race
to find civilization as they're pursued by horrors beyond their
imagination.</description>
    <description>Two girls must wade through the emotional debris that
clutters their lives after a tragic event brings them
together.</description>
  </movieDesc>
</t>

produces the wanted output (every line's length is as close as possible
to but not exceeding 64 and no word has been split into two:

<t>
   <movieDesc>
      <description>
They were betrayed by one of their own. Now the next heist isn't just
about money - it's about </description>
      <description>
One's an amateur real estate broker. The other's a yoga instructor.
Believe it or not, they're also two of LA's finest </description>
      <description>
The mild-mannered Jerry has second thoughts about his daughter's wedding
when he meets the groom's outrageous </description>
      <description>
Return to the swinging sixties with Renee Zellweger and Ewan McGregor as
they engage in a stylish battle of the </description>
      <description>
When Willard decides it's time for revenge, his loyal, furry friends
become his own personal </description>
      <description>
Young friends lost deep in the Appalachian hills race to find
civilization as they're pursued by horrors beyond their </description>
      <description>
Two girls must wade through the emotional debris that clutters their
lives after a tragic event brings them </description>
   </movieDesc>
</t>


Hope this helped.


=====
Cheers,

Dimitre Novatchev.
http://fxsl.sourceforge.net/ -- the home of FXSL




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