use Template;
use Template::Timer;
use MRO::Compat;
+use Scalar::Util qw/blessed/;
-our $VERSION = '0.30';
+our $VERSION = '0.34';
__PACKAGE__->mk_accessors('template');
__PACKAGE__->mk_accessors('include_path');
# configure in lib/MyApp.pm (Could be set from configfile instead)
- MyApp->config(
- name => 'MyApp',
- root => MyApp->path_to('root'),
+ __PACKAGE__->config(
+ name => 'MyApp',
+ root => MyApp->path_to('root'),
+ default_view => 'TT',
'View::TT' => {
# any TT configurations items go here
INCLUDE_PATH => [
- MyApp->path_to( 'root', 'src' ),
- MyApp->path_to( 'root', 'lib' ),
+ MyApp->path_to( 'root', 'src' ),
+ MyApp->path_to( 'root', 'lib' ),
],
TEMPLATE_EXTENSION => '.tt',
CATALYST_VAR => 'c',
# Not set by default
PRE_PROCESS => 'config/main',
WRAPPER => 'site/wrapper',
+ render_die => 1, # Default for new apps, see render method docs
},
);
-
+
# render view from lib/MyApp.pm or lib/MyApp::Controller::SomeController.pm
-
+
sub message : Global {
my ( $self, $c ) = @_;
$c->stash->{template} = 'message.tt2';
# access variables from template
The message is: [% message %].
-
+
# example when CATALYST_VAR is set to 'Catalyst'
- Context is [% Catalyst %]
- The base is [% Catalyst.req.base %]
- The name is [% Catalyst.config.name %]
-
+ Context is [% Catalyst %]
+ The base is [% Catalyst.req.base %]
+ The name is [% Catalyst.config.name %]
+
# example when CATALYST_VAR isn't set
Context is [% c %]
The base is [% base %]
}
my $self = $class->next::method(
- $c, { %$config },
+ $c, { %$config },
);
# Set base include paths. Local'd in render if needed
$self->include_path($config->{INCLUDE_PATH});
-
+
$self->config($config);
# Creation of template outside of call to new so that we can pass [ $self ]
# as INCLUDE_PATH config item, which then gets ->paths() called to get list
# of include paths to search for templates.
-
+
# Use a weakend copy of self so we dont have loops preventing GC from working
my $copy = $self;
Scalar::Util::weaken($copy);
@{ $p->{copy_config} };
}
}
+ local $@;
eval "require $prov";
if(!$@) {
push @providers, "$prov"->new($p->{args});
$config->{LOAD_TEMPLATES} = \@providers;
}
}
-
- $self->{template} =
+
+ $self->{template} =
Template->new($config) || do {
my $error = Template->error();
$c->log->error($error);
return 0;
}
- my $output = $self->render($c, $template);
-
- if (UNIVERSAL::isa($output, 'Template::Exception')) {
- my $error = qq/Couldn't render template "$output"/;
- $c->log->error($error);
- $c->error($error);
- return 0;
+ local $@;
+ my $output = eval { $self->render($c, $template) };
+ if (my $err = $@) {
+ return $self->_rendering_error($c, $template . ': ' . $err);
+ }
+ if (blessed($output) && $output->isa('Template::Exception')) {
+ $self->_rendering_error($c, $output);
}
unless ( $c->response->content_type ) {
return 1;
}
+sub _rendering_error {
+ my ($self, $c, $err) = @_;
+ my $error = qq/Couldn't render template "$err"/;
+ $c->log->error($error);
+ $c->error($error);
+ return 0;
+}
+
sub render {
my ($self, $c, $template, $args) = @_;
- $c->log->debug(qq/Rendering template "$template"/) if $c->debug;
+ $c->log->debug(qq/Rendering template "$template"/) if $c && $c->debug;
my $output;
- my $vars = {
+ my $vars = {
(ref $args eq 'HASH' ? %$args : %{ $c->stash() }),
$self->template_vars($c)
};
- local $self->{include_path} =
+ local $self->{include_path} =
[ @{ $vars->{additional_template_paths} }, @{ $self->{include_path} } ]
if ref $vars->{additional_template_paths};
- unless ($self->template->process( $template, $vars, \$output ) ) {
- return $self->template->error;
- } else {
- return $output;
+ unless ( $self->template->process( $template, $vars, \$output ) ) {
+ if (exists $self->{render_die}) {
+ die $self->template->error if $self->{render_die};
+ return $self->template->error;
+ }
+ $c->log->debug('The Catalyst::View::TT render() method will start dying on error in a future release. Unless you are calling the render() method manually, you probably want the new behaviour, so set render_die => 1 in config for ' . blessed($self) . '. If you wish to continue to return the exception rather than throwing it, add render_die => 0 to your config.') if $c->debug;
+ return $self->template->error;
}
+ return $output;
}
sub template_vars {
my ( $self, $c ) = @_;
+ return () unless $c;
my $cvar = $self->config->{CATALYST_VAR};
defined $cvar
something like this:
package FooBar::View::TT;
-
+
use strict;
use warnings;
-
+
use base 'Catalyst::View::TT';
- __PACKAGE__->config->{DEBUG} = 'all';
+ __PACKAGE__->config(DEBUG => 'all');
Now you can modify your action handlers in the main application and/or
controllers to forward to your view class. You might choose to do this
to the TT view class.
# In MyApp or MyApp::Controller::SomeController
-
+
sub end : Private {
my( $self, $c ) = @_;
$c->forward( $c->view('TT') );
}
+But if you are using the standard auto-generated end action, you don't even need
+to do this!
+
+ # in MyApp::Controller::Root
+ sub end : ActionClass('RenderView') {} # no need to change this line
+
+ # in MyApp.pm
+ __PACKAGE__->config(
+ ...
+ default_view => 'TT',
+ );
+
+This will Just Work. And it has the advantages that:
+
+=over 4
+
+=item *
+
+If you want to use a different view for a given request, just set
+<< $c->stash->{current_view} >>. (See L<Catalyst>'s C<< $c->view >> method
+for details.
+
+=item *
+
+<< $c->res->redirect >> is handled by default. If you just forward to
+C<View::TT> in your C<end> routine, you could break this by sending additional
+content.
+
+=back
+
+See L<Catalyst::Action::RenderView> for more details.
+
=head2 CONFIGURATION
There are a three different ways to configure your view class. The
happens when the module is first loaded.
package MyApp::View::TT;
-
+
use strict;
use base 'Catalyst::View::TT';
});
return $self->next::method(@_);
}
-
+
The final, and perhaps most direct way, is to define a class
item in your main application configuration, again by calling the
ubiquitous C<config()> method. The items in the class hash are
added to those already defined by the above two methods. This happens
in the base class new() method (which is one reason why you must
-remember to call it via C<MRO::Compat> if you redefine the C<new()>
+remember to call it via C<MRO::Compat> if you redefine the C<new()>
method in a subclass).
package MyApp;
-
+
use strict;
use Catalyst;
-
+
MyApp->config({
name => 'MyApp',
root => MyApp->path_to('root'),
Note that any configuration items defined by one of the earlier
methods will be overwritten by items of the same name provided by the
-latter methods.
+latter methods.
=head2 DYNAMIC INCLUDE_PATH
Sometimes it is desirable to modify INCLUDE_PATH for your templates at run time.
-
+
Additional paths can be added to the start of INCLUDE_PATH via the stash as
follows:
@{ $c->view('TT')->include_path } = qw/path another_path/;
-If you are calling C<render> directly then you can specify dynamic paths by
+If you are calling C<render> directly then you can specify dynamic paths by
having a C<additional_template_paths> key with a value of additonal directories
to search. See L<CAPTURING TEMPLATE OUTPUT> for an example showing this.
=head2 RENDERING VIEWS
The view plugin renders the template specified in the C<template>
-item in the stash.
+item in the stash.
sub message : Global {
my ( $self, $c ) = @_;
sub send_email : Local {
my ($self, $c) = @_;
-
+
$c->email(
header => [
To => 'me@localhost',
=head2 new
-The constructor for the TT view. Sets up the template provider,
+The constructor for the TT view. Sets up the template provider,
and reads the application config.
-=head2 process
+=head2 process($c)
Renders the template specified in C<< $c->stash->{template} >> or
C<< $c->action >> (the private name of the matched action). Calls L<render> to
perform actual rendering. Output is stored in C<< $c->response->body >>.
+It is possible to forward to the process method of a TT view from inside
+Catalyst like this:
+
+ $c->forward('View::TT');
+
+N.B. This is usually done automatically by L<Catalyst::Action::RenderView>.
+
=head2 render($c, $template, \%args)
-Renders the given template and returns output, or a L<Template::Exception>
-object upon error.
+Renders the given template and returns output. Throws a L<Template::Exception>
+object upon error.
-The template variables are set to C<%$args> if $args is a hashref, or
-$C<< $c->stash >> otherwise. In either case the variables are augmented with
-C<base> set to C< << $c->req->base >>, C<c> to C<$c> and C<name> to
+The template variables are set to C<%$args> if C<$args> is a hashref, or
+C<< $c->stash >> otherwise. In either case the variables are augmented with
+C<base> set to C<< $c->req->base >>, C<c> to C<$c>, and C<name> to
C<< $c->config->{name} >>. Alternately, the C<CATALYST_VAR> configuration item
can be defined to specify the name of a template variable through which the
-context reference (C<$c>) can be accessed. In this case, the C<c>, C<base> and
+context reference (C<$c>) can be accessed. In this case, the C<c>, C<base>, and
C<name> variables are omitted.
-C<$template> can be anything that Template::process understands how to
+C<$template> can be anything that Template::process understands how to
process, including the name of a template file or a reference to a test string.
See L<Template::process|Template/process> for a full list of supported formats.
+To use the render method outside of your Catalyst app, just pass a undef context.
+This can be useful for tests, for instance.
+
+It is possible to forward to the render method of a TT view from inside Catalyst
+to render page fragments like this:
+
+ my $fragment = $c->forward("View::TT", "render", $template_name, $c->stash->{fragment_data});
+
+=head3 Backwards compatibility note
+
+The render method used to just return the Template::Exception object, rather
+than just throwing it. This is now deprecated and instead the render method
+will throw an exception for new applications.
+
+This behaviour can be activated (and is activated in the default skeleton
+configuration) by using C<< render_die => 1 >>. If you rely on the legacy
+behaviour then a warning will be issued.
+
+To silence this warning, set C<< render_die => 0 >>, but it is recommended
+you adjust your code so that it works with C<< render_die => 1 >>.
+
+In a future release, C<< render_die => 1 >> will become the default if
+unspecified.
+
=head2 template_vars
Returns a list of keys/values to be used as the catalyst variables in the
The list of paths TT will look for templates in.
-=head2 C<CATALYST_VAR>
+=head2 C<CATALYST_VAR>
Allows you to change the name of the Catalyst context object. If set, it will also
remove the base and name aliases, so you will have access them through <context>.
For example:
package MyApp::Controller::Test;
- sub test : Local { .. }
+ sub test : Local { .. }
Would by default look for a template in <root>/test/test. If you set TEMPLATE_EXTENSION to '.tt', it will look for
<root>/test/test.tt.
You can also specify the 'copy_config' key as an arrayref, to copy those keys
from the general config, into the config for the provider:
-
+
DEFAULT_ENCODING => 'utf-8',
PROVIDERS => [
{
copy_config => [qw(DEFAULT_ENCODING INCLUDE_PATH)]
}
]
-
+
This can prove useful when you want to use the additional_template_paths hack
in your own provider, or if you need to use Template::Provider::Encoding
started. It also configures the view module to locate the templates
automatically.
+=head1 NOTES
+
+If you are using the L<CGI> module inside your templates, you will
+experience that the Catalyst server appears to hang while rendering
+the web page. This is due to the debug mode of L<CGI> (which is
+waiting for input in the terminal window). Turning off the
+debug mode using the "-no_debug" option solves the
+problem, eg.:
+
+ [% USE CGI('-no_debug') %]
+
=head1 SEE ALSO
L<Catalyst>, L<Catalyst::Helper::View::TT>,
=head1 COPYRIGHT
-This program is free software. You can redistribute it and/or modify it
+This program is free software. You can redistribute it and/or modify it
under the same terms as Perl itself.
=cut
projects / catagits/Catalyst-View-TT.git / blobdiff