/usr/share/perl5/Mojolicious/Renderer.pm is in libmojolicious-perl 2.23-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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use Mojo::Base -base;
use File::Spec;
use Mojo::Cache;
use Mojo::Command;
use Mojo::Home;
use Mojo::JSON;
use Mojo::Util 'encode';
has cache => sub { Mojo::Cache->new };
has default_format => 'html';
has detect_templates => 1;
has encoding => 'UTF-8';
has handlers => sub { {} };
has helpers => sub { {} };
has layout_prefix => 'layouts';
has root => '/';
has [qw/default_handler default_template_class/];
# "This is not how Xmas is supposed to be.
# In my day Xmas was about bringing people together,
# not blowing them apart."
sub new {
my $self = shift->SUPER::new(@_);
# Data
$self->add_handler(
data => sub {
my ($r, $c, $output, $options) = @_;
$$output = $options->{data};
}
);
# JSON
$self->add_handler(
json => sub {
my ($r, $c, $output, $options) = @_;
$$output = Mojo::JSON->new->encode($options->{json});
}
);
# Text
$self->add_handler(
text => sub {
my ($r, $c, $output, $options) = @_;
$$output = $options->{text};
}
);
return $self;
}
sub add_handler {
my ($self, $name, $cb) = @_;
$self->handlers->{$name} = $cb;
return $self;
}
sub add_helper {
my ($self, $name, $cb) = @_;
$self->helpers->{$name} = $cb;
return $self;
}
sub get_data_template {
my ($self, $options, $template) = @_;
return Mojo::Command->new->get_data($template,
$self->_detect_template_class($options));
}
# "Bodies are for hookers and fat people."
sub render {
my ($self, $c, $args) = @_;
$args ||= {};
# Localize extends and layout
my $partial = $args->{partial};
my $stash = $c->stash;
local $stash->{layout} = $partial ? undef : $stash->{layout};
local $stash->{extends} = $partial ? undef : $stash->{extends};
# Merge stash and arguments
while (my ($key, $value) = each %$args) { $stash->{$key} = $value }
# Extract important stash values
my $template = delete $stash->{template};
my $format = $stash->{format} || $self->default_format;
my $data = delete $stash->{data};
my $json = delete $stash->{json};
my $text = delete $stash->{text};
my $inline = delete $stash->{inline};
# Pick handler
my $handler = $stash->{handler};
$handler = $self->default_handler if defined $inline && !defined $handler;
my $options = {
template => $template,
format => $format,
handler => $handler,
encoding => $self->encoding,
inline => $inline,
template_class => $stash->{template_class}
};
# Text
my $output;
my $content = $stash->{'mojo.content'} ||= {};
if (defined $text) {
$self->handlers->{text}->($self, $c, \$output, {text => $text});
$content->{content} = $output
if ($c->stash->{extends} || $c->stash->{layout});
}
# Data
elsif (defined $data) {
$self->handlers->{data}->($self, $c, \$output, {data => $data});
$content->{content} = $output
if ($c->stash->{extends} || $c->stash->{layout});
}
# JSON
elsif (defined $json) {
$self->handlers->{json}->($self, $c, \$output, {json => $json});
$format = 'json';
$content->{content} = $output
if ($c->stash->{extends} || $c->stash->{layout});
}
# Template or templateless handler
else {
return unless $self->_render_template($c, \$output, $options);
$content->{content} = $output
if ($c->stash->{extends} || $c->stash->{layout});
}
# Extends
while ((my $extends = $self->_extends($c)) && !$json && !$data) {
$options->{template_class} = $stash->{template_class};
$options->{handler} = $stash->{handler};
$options->{format} = $stash->{format} || $self->default_format;
$options->{template} = $extends;
$self->_render_template($c, \$output, $options);
$content->{content} = $output
if $content->{content} !~ /\S/ && $output =~ /\S/;
}
# Encoding (JSON is already encoded)
unless ($partial) {
my $encoding = $options->{encoding};
$output = encode $encoding, $output
if $encoding && $output && !$json && !$data;
}
return $output, $c->app->types->type($format) || 'text/plain';
}
sub template_name {
my ($self, $options) = @_;
return unless my $template = $options->{template} || '';
return unless my $format = $options->{format};
my $handler = $options->{handler};
my $file = "$template.$format";
$file = "$file.$handler" if defined $handler;
return $file;
}
sub template_path {
my $self = shift;
return unless my $name = $self->template_name(shift);
return File::Spec->catfile($self->root, split '/', $name);
}
sub _detect_handler {
my ($self, $options) = @_;
# Disabled
return unless $self->detect_templates;
# Templates
my $templates = $self->{templates};
unless ($templates) {
$templates = $self->{templates} =
Mojo::Home->new->parse($self->root)->list_files;
}
# DATA templates
my $class = $self->_detect_template_class($options);
my $inline = $self->{data_templates}->{$class}
||= $self->_list_data_templates($class);
# Detect
return unless my $file = $self->template_name($options);
$file = quotemeta $file;
for my $template (@$templates, @$inline) {
if ($template =~ /^$file\.(\w+)$/) { return $1 }
}
return;
}
# "You are hereby conquered.
# Please line up in order of how much beryllium it takes to kill you."
sub _detect_template_class {
my ($self, $options) = @_;
$options->{template_class}
|| $ENV{MOJO_TEMPLATE_CLASS}
|| $self->default_template_class
|| 'main';
}
sub _extends {
my ($self, $c) = @_;
my $stash = $c->stash;
if (my $layout = delete $stash->{layout}) {
$stash->{extends} ||= $self->layout_prefix . '/' . $layout;
}
return delete $stash->{extends};
}
sub _list_data_templates {
my ($self, $class) = @_;
my $all = Mojo::Command->new->get_all_data($class);
return [keys %$all];
}
sub _render_template {
my ($self, $c, $output, $options) = @_;
# Render
my $handler =
$options->{handler}
|| $self->_detect_handler($options)
|| $self->default_handler;
$options->{handler} = $handler;
if (my $renderer = $self->handlers->{$handler}) {
return 1 if $renderer->($self, $c, $output, $options);
}
# No handler
else { $c->app->log->error(qq/No handler for "$handler" available./) }
return;
}
1;
__END__
=head1 NAME
Mojolicious::Renderer - MIME type based renderer
=head1 SYNOPSIS
use Mojolicious::Renderer;
my $renderer = Mojolicious::Renderer->new;
=head1 DESCRIPTION
L<Mojolicious::Renderer> is the standard L<Mojolicious> renderer.
See L<Mojolicious::Guides::Rendering> for more.
=head1 ATTRIBUTES
L<Mojolicious::Renderer> implements the following attributes.
=head2 C<cache>
my $cache = $renderer->cache;
$renderer = $renderer->cache(Mojo::Cache->new);
Renderer cache, defaults to a L<Mojo::Cache> object.
Note that this attribute is EXPERIMENTAL and might change without warning!
=head2 C<default_format>
my $default = $renderer->default_format;
$renderer = $renderer->default_format('html');
The default format to render if C<format> is not set in the stash.
The renderer will use L<Mojolicious/"types"> to look up the content MIME
type.
=head2 C<default_handler>
my $default = $renderer->default_handler;
$renderer = $renderer->default_handler('epl');
The default template handler to use for rendering in cases where auto
detection doesn't work, like for C<inline> templates.
=over 2
=item epl
C<Embedded Perl Lite> handled by L<Mojolicious::Plugin::EPLRenderer>.
=item ep
C<Embedded Perl> handled by L<Mojolicious::Plugin::EPRenderer>.
=back
=head2 C<default_template_class>
my $default = $renderer->default_template_class;
$renderer = $renderer->default_template_class('main');
The renderer will use this class to look for templates in the C<DATA>
section.
=head2 C<detect_templates>
my $detect = $renderer->detect_templates;
$renderer = $renderer->detect_templates(1);
Template auto detection, the renderer will try to select the right template
and renderer automatically.
=head2 C<encoding>
my $encoding = $renderer->encoding;
$renderer = $renderer->encoding('koi8-r');
Will encode the content if set, defaults to C<UTF-8>.
=head2 C<handlers>
my $handlers = $renderer->handlers;
$renderer = $renderer->handlers({epl => sub {...}});
Registered handlers.
=head2 C<helpers>
my $helpers = $renderer->helpers;
$renderer = $renderer->helpers({url_for => sub {...}});
Registered helpers.
=head2 C<layout_prefix>
my $prefix = $renderer->layout_prefix;
$renderer = $renderer->layout_prefix('layouts');
Directory to look for layouts in, defaults to C<layouts>.
=head2 C<root>
my $root = $renderer->root;
$renderer = $renderer->root('/foo/bar/templates');
Directory to look for templates in.
=head1 METHODS
L<Mojolicious::Renderer> inherits all methods from L<Mojo::Base> and implements the
following ones.
=head2 C<new>
my $renderer = Mojolicious::Renderer->new;
Construct a new renderer.
=head2 C<add_handler>
$renderer = $renderer->add_handler(epl => sub {...});
Add a new handler to the renderer.
See L<Mojolicious::Plugin::EPRenderer> for a sample renderer.
=head2 C<add_helper>
$renderer = $renderer->add_helper(url_for => sub {...});
Add a new helper to the renderer.
See L<Mojolicious::Plugin::EPRenderer> for sample helpers.
=head2 C<get_data_template>
my $template = $renderer->get_data_template({
template => 'foo/bar',
format => 'html',
handler => 'epl'
template_class => 'main'
}, 'foo.html.ep');
Get an DATA template by name, usually used by handlers.
=head2 C<render>
my ($output, $type) = $renderer->render($c);
my ($output, $type) = $renderer->render($c, $args);
Render output through one of the Mojo renderers.
This renderer requires some configuration, at the very least you will need to
have a default C<format> and a default C<handler> as well as a C<template> or
C<text>/C<json>.
See L<Mojolicious::Controller/"render"> for a more user friendly interface.
=head2 C<template_name>
my $template = $renderer->template_name({
template => 'foo/bar',
format => 'html',
handler => 'epl'
});
Builds a template name based on an options hash with C<template>, C<format>
and C<handler>.
=head2 C<template_path>
my $path = $renderer->template_path({
template => 'foo/bar',
format => 'html',
handler => 'epl'
});
Builds a full template path based on an options hash with C<template>,
C<format> and C<handler>.
=head1 SEE ALSO
L<Mojolicious>, L<Mojolicious::Guides>, L<http://mojolicio.us>.
=cut
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