Hierarchical tag closing

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Hi,

I want close the tags in hierarchical way.

This is my input.

HTML

<P_Normal><list-bull></P_Normal>
<P_list-bull(1)>Use Microsoft Windows accessibility  </P_list-bull(1)>
<P_list-simple(2)>   Magnify the display </P_list-simple(2)>
<P_list-simple(2)>   Change the size of text and icons </P_list-simple(2)>
<P_list-simple(2)>   Convert the text displayed  </P_list-simple(2)>
<P_list-simple(2)>   Change the contrast </P_list-simple(2)>
<P_list-simple(2)>   Display an onscreen keyboard </P_list-simple(2)>
<P_list-simple(2)>   Convert the mouse for left-handed use. </P_list-simple(2)>
<P_list-bull(1)>Deliver learning through  </P_list-bull(1)>
<P_list-bull(1)>Increase the character size on handouts for visually impaired learners. </P_list-bull(1)>
<P_list-bull(1)>Adjust background colours and fonts to assist dyslexic learners. </P_list-bull(1)>
<P_list-bull(1)><pg>13</pg>Provide feedback on written work using the comments facility and track changes rather than handwritten notes, so that the learners can change character size or use a text to speech application to hear feedback. </P_list-bull(1)>
</list-bull>

I want to close the list tags in hierarchical manner(below way)

HTML

<list list-type="bullet">
<list-item><p>Use Microsoft Windows accessibility options to:
<list list-type="simple">
<list-item><p> Magnify the display</p></list-item>
<list-item><p> Change the size of text and icons</p></list-item>
<list-item><p> Convert the text displayed into speech (i.e. narrator)</p></list-item>
<list-item><p> Change the contrast</p></list-item>
<list-item><p> Display an onscreen keyboard</p></list-item>
<list-item><p> Convert the mouse for left-handed use.</p></list-item>
</list></p></list-item>
<list-item><p>Deliver learning through </p></list-item>
<list-item><p>Increase the character </p></list-item>
<list-item><p> fonts to assist dyslexic learners.</p></list-item>
<list-item><p> Adjust background colours</p></list-item>
</list></p>

Please help me. Thank you.

Posted 5-Jan-12 19:17pm

ckulasekaran

Updated 6-Jan-12 20:16pm

v3

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2 solutions

Solution 1

Classical application of XSLT: XML to XML.

Posted 6-Jan-12 1:27am

Andreas Gieriet

Updated 6-Jan-12 1:28am

v2

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Andreas Gieriet · Accepted Answer · 2012-01-06T11:42:00

Since my Solution 1 is not really applicable (the tags are not XML conformant), enclosed please find an alternative version in Perl.

Cheers

Andi

PERL

#!perl

use strict;

# file:     { line NEWLINE } .
# line:     listitem | ANY_CHAR .
# listitem: begin itemtext end .
# begin:    '<' tag '>' .
# end:      '<' '/' tag '>' .
# tag:      'P_list-' kind '(' level ')' .
# itemtext: { ANY_CHAR_EXCEPT_NEWLINE } .

my $data = readfile(shift);

my $currentlevel = 0;
while($data =~ s%^[\s\S]*?<(P_list-(\w+)\((\d+)\))>(.*?)</\1>\s*%%g)
{
    my ($tag, $kind, $level, $text) = ($1, $2, $3, $4);
    if ($currentlevel < $level) {
        # open lists up to the given level
        while($currentlevel < $level) {
            printBeginList($kind);
            printBeginItem();
            $currentlevel++;
        }
    } elsif ($currentlevel > $level) {
        # close lists down to the given level
        while($currentlevel > $level) {
            $currentlevel--;
            printEndItem();
            printEndList();
        }
        printEndItem();
        printBeginItem();
    } else {
        # close former item
        printEndItem();
        printBeginItem();
    }
    printItem($text);
}
# close lists down to the top level
while($currentlevel > 0) {
    $currentlevel--;
    printEndItem();
    printEndList();
}
exit 0;

sub readfile {
    my ($file) = @_;

    my $sep = $/;
    $/ = undef;
    open(F, $file) or die("Failed to read '$file' ($!)");
    my $data = <F>;
    close(F);
    $/ = $sep;

    return $data;
}

sub getType {
    my ($kind) = @_;
    return $kind eq "bull" ? "bullet" : $kind;
}

sub printBeginList {
    my ($kind) = @_;
    print "\n<list list-type=\"", getType($kind), "\">\n";
}

sub printEndList {
    print "</list>\n";
}

sub printBeginItem {
    print "<list-item><p>";
}

sub printEndItem {
    print "</p></list-item>\n";
}

sub printItem {
    my ($text) = @_;
    print $text;
}