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.\" ========================================================================
.\"
.IX Title "Template::Declare::TagSet 3pm"
.TH Template::Declare::TagSet 3pm "2010-12-08" "perl v5.10.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Template::Declare::TagSet \- Base class for tag sets used by Template::Declare::Tags
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&    package My::TagSet;
\&    use base \*(AqTemplate::Declare::TagSet\*(Aq;
\&
\&    # returns an array ref for the tag names
\&    sub get_tag_list {
\&        [ qw(
\&            html body tr td table
\&            base meta link hr
\&        )]
\&    }
\&
\&    # prevents potential naming conflicts:
\&    sub get_alternate_spelling {
\&        my ($self, $tag) = @_;
\&        return \*(Aqrow\*(Aq  if $tag eq \*(Aqtr\*(Aq;
\&        return \*(Aqcell\*(Aq if $tag eq \*(Aqtd\*(Aq;
\&    }
\&
\&    # Specifies whether "<tag></tag>" can be
\&    # combined to "<tag />":
\&    sub can_combine_empty_tags {
\&        my ($self, $tag) = @_;
\&        $tag =~ /^ (?: base | meta | link | hr ) $/x;
\&    }
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Template::Declare::TagSet is the base class for declaring packages of
Template::Delcare tags. If you need to create new tags for use in your
templates, this is the base class for you! Review the source code of
Template::Declare::TagSet::HTML for a
useful example.
.SH "METHODS"
.IX Header "METHODS"
.SS "new( \s-1PARAMS\s0 )"
.IX Subsection "new( PARAMS )"
.Vb 4
\&    my $tag_set = Template::Declare::TagSet\->new({
\&        package   => \*(AqFoo::Bar\*(Aq,
\&        namespace => undef,
\&    });
.Ve
.PP
Constructor created by \f(CW\*(C`Class::Accessor::Fast\*(C'\fR, accepting an optional hash
reference of parameters.
.SS "get_tag_list"
.IX Subsection "get_tag_list"
.Vb 1
\&    my $list = $tag_set\->get_tag_list();
.Ve
.PP
Returns an array ref for the tag names offered by a tag set.
.SS "get_alternate_spelling( \s-1TAG\s0 )"
.IX Subsection "get_alternate_spelling( TAG )"
.Vb 1
\&    $bool = $obj\->get_alternate_spelling($tag);
.Ve
.PP
Returns true if a tag has an alternative spelling. Basically it provides a way
to work around naming conflicts. For example, the \f(CW\*(C`tr\*(C'\fR tag in \s-1HTML\s0 conflicts
with Perl's \f(CW\*(C`tr\*(C'\fR operator, and the \f(CW\*(C`template\*(C'\fR tag in \s-1XUL\s0 conflicts with the
\&\f(CW\*(C`template\*(C'\fR sub exported by \f(CW\*(C`Template::Declare::Tags\*(C'\fR.
.SS "can_combine_empty_tags( \s-1TAG\s0 )"
.IX Subsection "can_combine_empty_tags( TAG )"
.Vb 1
\&    $bool = $obj\->can_combine_empty_tags($tag);
.Ve
.PP
Specifies whether \f(CW\*(C`<tag></tag>\*(C'\fR can be combined into a single token,
\&\f(CW\*(C`<tag />\*(C'\fR. By default, all tags can be combined into a single token;
override in a subclass to change this value where appropriate. For example,
\&\f(CW\*(C`Template::Declare::TagSet::HTML\->can_combine_empty_tags(\*(Aqimg\*(Aq)\*(C'\fR returns
true since \f(CW\*(C`<img src="..." />\*(C'\fR is always required for \s-1HTML\s0 pages.
\&\f(CW\*(C`Template::Declare::TagSet::HTML\->can_combine_empty_tags(\*(Aqscript\*(Aq)\*(C'\fR, on
the other hand, returns false, since some browsers can't handle a single
script token.
.SH "ACCESSORS"
.IX Header "ACCESSORS"
This class has two read-only accessors:
.SS "package"
.IX Subsection "package"
.Vb 1
\&    my $package = $obj\->package();
.Ve
.PP
Retrieves the value of the \f(CW\*(C`package\*(C'\fR option set via the constructor.
.SS "namespace"
.IX Subsection "namespace"
.Vb 1
\&    my $namespace = $obj\->namespace();
.Ve
.PP
Retrieves the value of the \f(CW\*(C`namespace\*(C'\fR option set via the constructor.
.SH "AUTHOR"
.IX Header "AUTHOR"
Agent Zhang <agentzh@yahoo.cn>.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Template::Declare::TagSet::HTML, Template::Declare::TagSet::XUL, Template::Declare::Tags,
Template::Declare.