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Haml parser in Perl

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README.md

NAME

Text::Haml - Haml Perl implementation

SYNOPSIS

use Text::Haml;

my $haml = Text::Haml->new;

my $html = $haml->render('%p foo'); # <p>foo</p>

$html = $haml->render('= $user', user => 'friend'); # <div>friend</div>

# Use Haml file
$html = $haml->render_file('tmpl/index.haml', user => 'friend');

DESCRIPTION

Text::Haml implements Haml http://haml-lang.com/docs/yardoc/file.HAML_REFERENCE.html specification.

Text::Haml passes specification tests written by Norman Clarke http://github.com/norman/haml-spec and supports only cross-language Haml features. Do not expect Ruby specific things to work.

ATTRIBUTES

Text::Haml implements the following attributes:

append

Holds the string of code that is appended to the generated Perl code.

code

Holds the Perl code.

compiled

Holds compiled code.

encoding

$haml->encoding('utf-8');

Default is utf-8.

escape

Escape subroutine presented as string.

Default is

$haml->escape(<<'EOF');
    my $s = shift;
    return unless defined $s;
    $s =~ s/&/&amp;/g;
    $s =~ s/</&lt;/g;
    $s =~ s/>/&gt;/g;
    $s =~ s/"/&quot;/g;
    $s =~ s/'/&apos;/g;
    return $s;
EOF

escape_html

$haml->escape_html(0);

Switch on/off Haml output html escaping. Default is on.

filters

Holds filters.

format

$haml->format('xhtml');

Supported formats: xhtml, html, html5.

Default is xhtml.

namespace

Holds the namespace under which the Perl package is generated.

prepend

Holds the string of code that is prepended to the generated Perl code.

vars

Holds the variables that are passed during the rendering.

vars_as_subs

When options is NOT SET (by default) passed variables are normal Perl variables and are used with $ prefix.

$haml->render('%p $var', var => 'hello');

When this option is SET passed variables are Perl lvalue subroutines and are used without $ prefix.

$haml->render('%p var', var => 'hello');

But if you declare Perl variable in a block, it must be used with $ prefix.

$haml->render('<<EOF')
    - my $foo;
    %p= $foo
EOF

helpers

helpers => {
    foo => sub {
        my $self   = shift;
        my $string = shift;

        $string =~ s/r/z/;

        return $string;
    }
}

Holds helpers subroutines. Helpers can be called in Haml text as normal Perl functions. See also add_helper.

helpers_arg

$haml->helpers_args($my_context);

First argument passed to the helper (Text::Haml instance by default).

error

$haml->error;

Holds the last error.

tape

Holds parsed haml elements.

path

Holds path of Haml templates. Current directory is a default. If you want to set several paths, arrayref can also be set up. This way is the same as Text::Xslate.

cache

Holds cache level of Haml templates. 1 is a default. 0 means "Not cached", 1 means "Checked template mtime" and 2 means "Used always cached". This way is the same as Text::Xslate.

cache_dir

Holds cache directory of Haml templates. $ENV{HOME}/.text_haml_cache is a default. Unless $ENV{HOME}, File::Spec->tempdir was used. This way is the same as Text::Xslate.

METHODS

new

my $haml = Text::Haml->new;

add_helper

$haml->add_helper(current_time => sub { time });

Adds a new helper.

add_filter

$haml->add_filter(compress => sub { $_[0] =~ s/\s+/ /g; $_[0]});

Adds a new filter.

build

$haml->build(@_);

Builds the Perl code.

compile

$haml->compile;

Compiles parsed code.

interpret

$haml->interpret(@_);

Interprets compiled code.

parse

$haml->parse('%p foo');

Parses Haml string building a tree.

render

my $text = $haml->render('%p foo');

my $text = $haml->render('%p var', var => 'hello');

Renders Haml string. Returns undef on error. See error attribute.

render_file

my $text = $haml->render_file('foo.haml', var => 'hello');

A helper method that loads a file and passes it to the render method. Since "%____vars" is used internally, you cannot use this as parameter name.

PERL SPECIFIC IMPLEMENTATION ISSUES

String interpolation

Despite of existing string interpolation in Perl, Ruby interpolation is also supported.

$haml->render('%p Hello #{user}', user => 'foo')

Hash keys

When declaring tag attributes : symbol can be used.

$haml->render("%a{:href => 'bar'}");

Perl-style is supported but not recommented, since your Haml template won't work with Ruby Haml implementation parser.

$haml->render("%a{href => 'bar'}");

DEVELOPMENT

Repository

http://github.com/vti/text-haml

AUTHOR

Viacheslav Tykhanovskyi, vti@cpan.org.

CREDITS

In order of appearance:

Nick Ragouzis

Norman Clarke

rightgo09

Breno G. de Oliveira (garu)

Yuya Tanaka

Wanradt Koell (wanradt)

Keedi Kim

Carlos Lima

Jason Younker

TheAthlete

COPYRIGHT AND LICENSE

Copyright (C) 2009-2013, Viacheslav Tykhanovskyi.

This program is free software, you can redistribute it and/or modify it under the terms of the Artistic License version 2.0.

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