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8077080c |
1 | package Catalyst::View::TT; |
2 | |
3 | use strict; |
6229ce0d |
4 | use warnings; |
5 | |
7d8aa5ec |
6 | use base qw/Catalyst::View/; |
9e739e1e |
7 | use Data::Dump 'dump'; |
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8 | use Template; |
9 | use Template::Timer; |
e8693f1b |
10 | use MRO::Compat; |
4a70bc59 |
11 | use Scalar::Util qw/blessed weaken/; |
8077080c |
12 | |
fe3df9dc |
13 | our $VERSION = '0.38'; |
85ea459d |
14 | $VERSION = eval $VERSION; |
8077080c |
15 | |
16 | __PACKAGE__->mk_accessors('template'); |
46cdc47d |
17 | __PACKAGE__->mk_accessors('expose_methods'); |
e2bbd784 |
18 | __PACKAGE__->mk_accessors('include_path'); |
8077080c |
19 | |
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20 | *paths = \&include_path; |
21 | |
8077080c |
22 | =head1 NAME |
23 | |
24 | Catalyst::View::TT - Template View Class |
25 | |
26 | =head1 SYNOPSIS |
27 | |
bd4ee63a |
28 | # use the helper to create your View |
ad50568f |
29 | |
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30 | myapp_create.pl view Web TT |
8077080c |
31 | |
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32 | # add custom configration in View/Web.pm |
8cd017a8 |
33 | |
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34 | __PACKAGE__->config( |
226c1dd3 |
35 | # any TT configuration items go here |
226c1dd3 |
36 | TEMPLATE_EXTENSION => '.tt', |
37 | CATALYST_VAR => 'c', |
38 | TIMER => 0, |
61e9ca2a |
39 | ENCODING => 'utf-8' |
226c1dd3 |
40 | # Not set by default |
41 | PRE_PROCESS => 'config/main', |
42 | WRAPPER => 'site/wrapper', |
43 | render_die => 1, # Default for new apps, see render method docs |
a6fa99df |
44 | expose_methods => [qw/method_in_view_class/], |
ae035767 |
45 | ); |
f5b61ad7 |
46 | |
61e9ca2a |
47 | # add include path configuration in MyApp.pm |
48 | |
49 | __PACKAGE__->config( |
50 | 'View::Web' => { |
51 | INCLUDE_PATH => [ |
52 | __PACKAGE__->path_to( 'root', 'src' ), |
53 | __PACKAGE__->path_to( 'root', 'lib' ), |
54 | ], |
55 | }, |
56 | ); |
57 | |
6229ce0d |
58 | # render view from lib/MyApp.pm or lib/MyApp::Controller::SomeController.pm |
f5b61ad7 |
59 | |
8cd017a8 |
60 | sub message : Global { |
94b3529a |
61 | my ( $self, $c ) = @_; |
62 | $c->stash->{template} = 'message.tt2'; |
63 | $c->stash->{message} = 'Hello World!'; |
226c1dd3 |
64 | $c->forward( $c->view('Web') ); |
8cd017a8 |
65 | } |
8077080c |
66 | |
8cd017a8 |
67 | # access variables from template |
68 | |
69 | The message is: [% message %]. |
f5b61ad7 |
70 | |
8cd017a8 |
71 | # example when CATALYST_VAR is set to 'Catalyst' |
f5b61ad7 |
72 | Context is [% Catalyst %] |
73 | The base is [% Catalyst.req.base %] |
74 | The name is [% Catalyst.config.name %] |
75 | |
8cd017a8 |
76 | # example when CATALYST_VAR isn't set |
77 | Context is [% c %] |
78 | The base is [% base %] |
79 | The name is [% name %] |
80 | |
bd4ee63a |
81 | =cut |
82 | |
83 | sub _coerce_paths { |
84 | my ( $paths, $dlim ) = shift; |
85 | return () if ( !$paths ); |
86 | return @{$paths} if ( ref $paths eq 'ARRAY' ); |
87 | |
88 | # tweak delim to ignore C:/ |
89 | unless ( defined $dlim ) { |
90 | $dlim = ( $^O eq 'MSWin32' ) ? ':(?!\\/)' : ':'; |
91 | } |
92 | return split( /$dlim/, $paths ); |
93 | } |
94 | |
95 | sub new { |
96 | my ( $class, $c, $arguments ) = @_; |
97 | my $config = { |
98 | EVAL_PERL => 0, |
99 | TEMPLATE_EXTENSION => '', |
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100 | CLASS => 'Template', |
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101 | %{ $class->config }, |
102 | %{$arguments}, |
103 | }; |
104 | if ( ! (ref $config->{INCLUDE_PATH} eq 'ARRAY') ) { |
105 | my $delim = $config->{DELIMITER}; |
106 | my @include_path |
107 | = _coerce_paths( $config->{INCLUDE_PATH}, $delim ); |
108 | if ( !@include_path ) { |
109 | my $root = $c->config->{root}; |
110 | my $base = Path::Class::dir( $root, 'base' ); |
111 | @include_path = ( "$root", "$base" ); |
112 | } |
113 | $config->{INCLUDE_PATH} = \@include_path; |
114 | } |
115 | |
116 | # if we're debugging and/or the TIMER option is set, then we install |
117 | # Template::Timer as a custom CONTEXT object, but only if we haven't |
118 | # already got a custom CONTEXT defined |
119 | |
120 | if ( $config->{TIMER} ) { |
121 | if ( $config->{CONTEXT} ) { |
122 | $c->log->error( |
123 | 'Cannot use Template::Timer - a TT CONTEXT is already defined' |
124 | ); |
125 | } |
126 | else { |
127 | $config->{CONTEXT} = Template::Timer->new(%$config); |
128 | } |
129 | } |
130 | |
131 | if ( $c->debug && $config->{DUMP_CONFIG} ) { |
9e739e1e |
132 | $c->log->debug( "TT Config: ", dump($config) ); |
bd4ee63a |
133 | } |
6175bba7 |
134 | |
e8693f1b |
135 | my $self = $class->next::method( |
f5b61ad7 |
136 | $c, { %$config }, |
6175bba7 |
137 | ); |
138 | |
139 | # Set base include paths. Local'd in render if needed |
140 | $self->include_path($config->{INCLUDE_PATH}); |
f5b61ad7 |
141 | |
46cdc47d |
142 | $self->expose_methods($config->{expose_methods}); |
6175bba7 |
143 | $self->config($config); |
144 | |
145 | # Creation of template outside of call to new so that we can pass [ $self ] |
146 | # as INCLUDE_PATH config item, which then gets ->paths() called to get list |
147 | # of include paths to search for templates. |
f5b61ad7 |
148 | |
6175bba7 |
149 | # Use a weakend copy of self so we dont have loops preventing GC from working |
150 | my $copy = $self; |
151 | Scalar::Util::weaken($copy); |
152 | $config->{INCLUDE_PATH} = [ sub { $copy->paths } ]; |
153 | |
bd4ee63a |
154 | if ( $config->{PROVIDERS} ) { |
155 | my @providers = (); |
156 | if ( ref($config->{PROVIDERS}) eq 'ARRAY') { |
157 | foreach my $p (@{$config->{PROVIDERS}}) { |
158 | my $pname = $p->{name}; |
159 | my $prov = 'Template::Provider'; |
160 | if($pname eq '_file_') |
161 | { |
162 | $p->{args} = { %$config }; |
163 | } |
164 | else |
165 | { |
51199593 |
166 | if($pname =~ s/^\+//) { |
167 | $prov = $pname; |
168 | } |
169 | else |
170 | { |
171 | $prov .= "::$pname"; |
172 | } |
6175bba7 |
173 | # We copy the args people want from the config |
174 | # to the args |
175 | $p->{args} ||= {}; |
176 | if ($p->{copy_config}) { |
177 | map { $p->{args}->{$_} = $config->{$_} } |
178 | grep { exists $config->{$_} } |
179 | @{ $p->{copy_config} }; |
180 | } |
bd4ee63a |
181 | } |
fc0ffed0 |
182 | local $@; |
bd4ee63a |
183 | eval "require $prov"; |
184 | if(!$@) { |
185 | push @providers, "$prov"->new($p->{args}); |
186 | } |
187 | else |
188 | { |
189 | $c->log->warn("Can't load $prov, ($@)"); |
190 | } |
191 | } |
192 | } |
193 | delete $config->{PROVIDERS}; |
194 | if(@providers) { |
195 | $config->{LOAD_TEMPLATES} = \@providers; |
196 | } |
197 | } |
f5b61ad7 |
198 | |
199 | $self->{template} = |
7bd88b61 |
200 | $config->{CLASS}->new($config) || do { |
201 | my $error = $config->{CLASS}->error(); |
bd4ee63a |
202 | $c->log->error($error); |
203 | $c->error($error); |
204 | return undef; |
205 | }; |
206 | |
207 | |
208 | return $self; |
209 | } |
210 | |
211 | sub process { |
212 | my ( $self, $c ) = @_; |
213 | |
214 | my $template = $c->stash->{template} |
215 | || $c->action . $self->config->{TEMPLATE_EXTENSION}; |
216 | |
217 | unless (defined $template) { |
218 | $c->log->debug('No template specified for rendering') if $c->debug; |
219 | return 0; |
220 | } |
221 | |
fc0ffed0 |
222 | local $@; |
cad820fe |
223 | my $output = eval { $self->render($c, $template) }; |
224 | if (my $err = $@) { |
c5c3c6bd |
225 | return $self->_rendering_error($c, $template . ': ' . $err); |
316f014a |
226 | } |
227 | if (blessed($output) && $output->isa('Template::Exception')) { |
228 | $self->_rendering_error($c, $output); |
bd4ee63a |
229 | } |
230 | |
231 | unless ( $c->response->content_type ) { |
232 | $c->response->content_type('text/html; charset=utf-8'); |
233 | } |
234 | |
235 | $c->response->body($output); |
236 | |
237 | return 1; |
238 | } |
239 | |
316f014a |
240 | sub _rendering_error { |
241 | my ($self, $c, $err) = @_; |
242 | my $error = qq/Couldn't render template "$err"/; |
243 | $c->log->error($error); |
244 | $c->error($error); |
245 | return 0; |
246 | } |
247 | |
bd4ee63a |
248 | sub render { |
249 | my ($self, $c, $template, $args) = @_; |
250 | |
cbb149dc |
251 | $c->log->debug(qq/Rendering template "$template"/) if $c && $c->debug; |
bd4ee63a |
252 | |
253 | my $output; |
f5b61ad7 |
254 | my $vars = { |
bd4ee63a |
255 | (ref $args eq 'HASH' ? %$args : %{ $c->stash() }), |
256 | $self->template_vars($c) |
257 | }; |
258 | |
f5b61ad7 |
259 | local $self->{include_path} = |
bd4ee63a |
260 | [ @{ $vars->{additional_template_paths} }, @{ $self->{include_path} } ] |
261 | if ref $vars->{additional_template_paths}; |
262 | |
596ff245 |
263 | unless ( $self->template->process( $template, $vars, \$output ) ) { |
264 | if (exists $self->{render_die}) { |
265 | die $self->template->error if $self->{render_die}; |
266 | return $self->template->error; |
267 | } |
131a8e59 |
268 | $c->log->debug('The Catalyst::View::TT render() method will start dying on error in a future release. Unless you are calling the render() method manually, you probably want the new behaviour, so set render_die => 1 in config for ' . blessed($self) . '. If you wish to continue to return the exception rather than throwing it, add render_die => 0 to your config.') if $c->debug; |
596ff245 |
269 | return $self->template->error; |
270 | } |
cad820fe |
271 | return $output; |
bd4ee63a |
272 | } |
273 | |
274 | sub template_vars { |
275 | my ( $self, $c ) = @_; |
276 | |
cbb149dc |
277 | return () unless $c; |
bd4ee63a |
278 | my $cvar = $self->config->{CATALYST_VAR}; |
279 | |
a6fa99df |
280 | my %vars = defined $cvar |
bd4ee63a |
281 | ? ( $cvar => $c ) |
282 | : ( |
283 | c => $c, |
284 | base => $c->req->base, |
285 | name => $c->config->{name} |
a6fa99df |
286 | ); |
287 | |
46cdc47d |
288 | if ($self->expose_methods) { |
a6fa99df |
289 | my $meta = $self->meta; |
46cdc47d |
290 | foreach my $method_name (@{$self->expose_methods}) { |
1cb1d672 |
291 | my $method = $meta->find_method_by_name( $method_name ); |
a6fa99df |
292 | unless ($method) { |
293 | Catalyst::Exception->throw( "$method_name not found in TT view" ); |
294 | } |
295 | my $method_body = $method->body; |
4a70bc59 |
296 | my $weak_ctx = $c; |
297 | weaken $weak_ctx; |
a6fa99df |
298 | my $sub = sub { |
4a70bc59 |
299 | $self->$method_body($weak_ctx, @_); |
a6fa99df |
300 | }; |
301 | $vars{$method_name} = $sub; |
302 | } |
303 | } |
304 | return %vars; |
bd4ee63a |
305 | } |
306 | |
bd4ee63a |
307 | 1; |
308 | |
309 | __END__ |
310 | |
8cd017a8 |
311 | =head1 DESCRIPTION |
312 | |
313 | This is the Catalyst view class for the L<Template Toolkit|Template>. |
314 | Your application should defined a view class which is a subclass of |
226c1dd3 |
315 | this module. Throughout this manual it will be assumed that your application |
316 | is named F<MyApp> and you are creating a TT view named F<Web>; these names |
317 | are placeholders and should always be replaced with whatever name you've |
318 | chosen for your application and your view. The easiest way to create a TT |
319 | view class is through the F<myapp_create.pl> script that is created along |
320 | with the application: |
8cd017a8 |
321 | |
226c1dd3 |
322 | $ script/myapp_create.pl view Web TT |
8cd017a8 |
323 | |
226c1dd3 |
324 | This creates a F<MyApp::View::Web.pm> module in the F<lib> directory (again, |
8cd017a8 |
325 | replacing C<MyApp> with the name of your application) which looks |
326 | something like this: |
327 | |
226c1dd3 |
328 | package FooBar::View::Web; |
62a61466 |
329 | use Moose; |
f5b61ad7 |
330 | |
62a61466 |
331 | extends 'Catalyst::View::TT'; |
8077080c |
332 | |
a1b7968f |
333 | __PACKAGE__->config(DEBUG => 'all'); |
8077080c |
334 | |
8cd017a8 |
335 | Now you can modify your action handlers in the main application and/or |
336 | controllers to forward to your view class. You might choose to do this |
337 | in the end() method, for example, to automatically forward all actions |
338 | to the TT view class. |
722fede4 |
339 | |
8cd017a8 |
340 | # In MyApp or MyApp::Controller::SomeController |
f5b61ad7 |
341 | |
8cd017a8 |
342 | sub end : Private { |
94b3529a |
343 | my( $self, $c ) = @_; |
226c1dd3 |
344 | $c->forward( $c->view('Web') ); |
8cd017a8 |
345 | } |
8077080c |
346 | |
2844488f |
347 | But if you are using the standard auto-generated end action, you don't even need |
348 | to do this! |
349 | |
350 | # in MyApp::Controller::Root |
351 | sub end : ActionClass('RenderView') {} # no need to change this line |
352 | |
353 | # in MyApp.pm |
354 | __PACKAGE__->config( |
355 | ... |
226c1dd3 |
356 | default_view => 'Web', |
2844488f |
357 | ); |
358 | |
359 | This will Just Work. And it has the advantages that: |
360 | |
361 | =over 4 |
362 | |
363 | =item * |
364 | |
365 | If you want to use a different view for a given request, just set |
366 | << $c->stash->{current_view} >>. (See L<Catalyst>'s C<< $c->view >> method |
367 | for details. |
368 | |
369 | =item * |
370 | |
371 | << $c->res->redirect >> is handled by default. If you just forward to |
226c1dd3 |
372 | C<View::Web> in your C<end> routine, you could break this by sending additional |
2844488f |
373 | content. |
374 | |
375 | =back |
376 | |
377 | See L<Catalyst::Action::RenderView> for more details. |
378 | |
8cd017a8 |
379 | =head2 CONFIGURATION |
4687ac0d |
380 | |
8cd017a8 |
381 | There are a three different ways to configure your view class. The |
382 | first way is to call the C<config()> method in the view subclass. This |
383 | happens when the module is first loaded. |
8077080c |
384 | |
226c1dd3 |
385 | package MyApp::View::Web; |
adb2ce78 |
386 | use Moose; |
387 | extends 'Catalyst::View::TT'; |
722fede4 |
388 | |
226c1dd3 |
389 | __PACKAGE__->config({ |
8cd017a8 |
390 | PRE_PROCESS => 'config/main', |
391 | WRAPPER => 'site/wrapper', |
392 | }); |
393 | |
226c1dd3 |
394 | You may also override the configuration provided in the view class by adding |
adb2ce78 |
395 | a 'View::Web' section to your application config. |
396 | |
397 | This should generally be used to inject the include paths into the view to |
398 | avoid the view trying to load the application to resolve paths. |
399 | |
400 | .. inside MyApp.pm .. |
401 | __PACKAGE__->config( |
402 | 'View::Web' => { |
403 | INCLUDE_PATH => [ |
404 | __PACKAGE__->path_to( 'root', 'templates', 'lib' ), |
405 | __PACKAGE__->path_to( 'root', 'templates', 'src' ), |
406 | ], |
407 | }, |
408 | ); |
409 | |
410 | You can also configure your view from within your config file if you're |
411 | using L<Catalyst::Plugin::ConfigLoader>. This should be reserved for |
226c1dd3 |
412 | deployment-specific concerns. For example: |
8cd017a8 |
413 | |
226c1dd3 |
414 | # MyApp_local.conf (Config::General format) |
f5b61ad7 |
415 | |
226c1dd3 |
416 | <View Web> |
417 | WRAPPER "custom_wrapper" |
418 | INCLUDE_PATH __path_to('root/templates/custom_site')__ |
419 | INCLUDE_PATH __path_to('root/templates')__ |
420 | </View> |
8cd017a8 |
421 | |
226c1dd3 |
422 | might be used as part of a simple way to deploy different instances of the |
423 | same application with different themes. |
8cd017a8 |
424 | |
e2bbd784 |
425 | =head2 DYNAMIC INCLUDE_PATH |
426 | |
f7dfca06 |
427 | Sometimes it is desirable to modify INCLUDE_PATH for your templates at run time. |
f5b61ad7 |
428 | |
f7dfca06 |
429 | Additional paths can be added to the start of INCLUDE_PATH via the stash as |
430 | follows: |
431 | |
432 | $c->stash->{additional_template_paths} = |
433 | [$c->config->{root} . '/test_include_path']; |
434 | |
435 | If you need to add paths to the end of INCLUDE_PATH, there is also an |
436 | include_path() accessor available: |
437 | |
226c1dd3 |
438 | push( @{ $c->view('Web')->include_path }, qw/path/ ); |
f7dfca06 |
439 | |
440 | Note that if you use include_path() to add extra paths to INCLUDE_PATH, you |
441 | MUST check for duplicate paths. Without such checking, the above code will add |
442 | "path" to INCLUDE_PATH at every request, causing a memory leak. |
443 | |
444 | A safer approach is to use include_path() to overwrite the array of paths |
445 | rather than adding to it. This eliminates both the need to perform duplicate |
446 | checking and the chance of a memory leak: |
e2bbd784 |
447 | |
226c1dd3 |
448 | @{ $c->view('Web')->include_path } = qw/path another_path/; |
e2bbd784 |
449 | |
f5b61ad7 |
450 | If you are calling C<render> directly then you can specify dynamic paths by |
9d574573 |
451 | having a C<additional_template_paths> key with a value of additonal directories |
1bc9fc55 |
452 | to search. See L<CAPTURING TEMPLATE OUTPUT> for an example showing this. |
453 | |
e22ff352 |
454 | =head2 Unicode |
455 | |
456 | Be sure to set C<< ENCODING => 'utf-8' >> and use |
457 | L<Catalyst::Plugin::Unicode::Encoding> if you want to use non-ascii |
458 | characters (encoded as utf-8) in your templates. |
459 | |
8cd017a8 |
460 | =head2 RENDERING VIEWS |
461 | |
462 | The view plugin renders the template specified in the C<template> |
f5b61ad7 |
463 | item in the stash. |
8cd017a8 |
464 | |
465 | sub message : Global { |
94b3529a |
466 | my ( $self, $c ) = @_; |
467 | $c->stash->{template} = 'message.tt2'; |
226c1dd3 |
468 | $c->forward( $c->view('Web') ); |
8cd017a8 |
469 | } |
722fede4 |
470 | |
c969f23a |
471 | If a stash item isn't defined, then it instead uses the |
472 | stringification of the action dispatched to (as defined by $c->action) |
473 | in the above example, this would be C<message>, but because the default |
474 | is to append '.tt', it would load C<root/message.tt>. |
8cd017a8 |
475 | |
476 | The items defined in the stash are passed to the Template Toolkit for |
477 | use as template variables. |
478 | |
8cd017a8 |
479 | sub default : Private { |
94b3529a |
480 | my ( $self, $c ) = @_; |
481 | $c->stash->{template} = 'message.tt2'; |
482 | $c->stash->{message} = 'Hello World!'; |
226c1dd3 |
483 | $c->forward( $c->view('Web') ); |
8cd017a8 |
484 | } |
7b592fc7 |
485 | |
8cd017a8 |
486 | A number of other template variables are also added: |
8077080c |
487 | |
8cd017a8 |
488 | c A reference to the context object, $c |
489 | base The URL base, from $c->req->base() |
490 | name The application name, from $c->config->{ name } |
491 | |
492 | These can be accessed from the template in the usual way: |
493 | |
494 | <message.tt2>: |
495 | |
496 | The message is: [% message %] |
497 | The base is [% base %] |
498 | The name is [% name %] |
499 | |
8cd017a8 |
500 | |
1bc9fc55 |
501 | The output generated by the template is stored in C<< $c->response->body >>. |
502 | |
503 | =head2 CAPTURING TEMPLATE OUTPUT |
504 | |
505 | If you wish to use the output of a template for some other purpose than |
506 | displaying in the response, e.g. for sending an email, this is possible using |
507 | L<Catalyst::Plugin::Email> and the L<render> method: |
508 | |
509 | sub send_email : Local { |
510 | my ($self, $c) = @_; |
f5b61ad7 |
511 | |
1bc9fc55 |
512 | $c->email( |
513 | header => [ |
514 | To => 'me@localhost', |
515 | Subject => 'A TT Email', |
516 | ], |
226c1dd3 |
517 | body => $c->view('Web')->render($c, 'email.tt', { |
9d574573 |
518 | additional_template_paths => [ $c->config->{root} . '/email_templates'], |
1bc9fc55 |
519 | email_tmpl_param1 => 'foo' |
520 | } |
521 | ), |
522 | ); |
523 | # Redirect or display a message |
524 | } |
8cd017a8 |
525 | |
526 | =head2 TEMPLATE PROFILING |
527 | |
1bc9fc55 |
528 | See L<C<TIMER>> property of the L<config> method. |
529 | |
caa61517 |
530 | =head2 METHODS |
8077080c |
531 | |
b63ddd04 |
532 | =head2 new |
2774dc77 |
533 | |
f5b61ad7 |
534 | The constructor for the TT view. Sets up the template provider, |
2774dc77 |
535 | and reads the application config. |
536 | |
81b7f2a2 |
537 | =head2 process($c) |
8077080c |
538 | |
1bc9fc55 |
539 | Renders the template specified in C<< $c->stash->{template} >> or |
ad50568f |
540 | C<< $c->action >> (the private name of the matched action). Calls L<render> to |
1bc9fc55 |
541 | perform actual rendering. Output is stored in C<< $c->response->body >>. |
8077080c |
542 | |
81b7f2a2 |
543 | It is possible to forward to the process method of a TT view from inside |
544 | Catalyst like this: |
545 | |
226c1dd3 |
546 | $c->forward('View::Web'); |
81b7f2a2 |
547 | |
548 | N.B. This is usually done automatically by L<Catalyst::Action::RenderView>. |
f2ee4d6c |
549 | |
b63ddd04 |
550 | =head2 render($c, $template, \%args) |
1bc9fc55 |
551 | |
cad820fe |
552 | Renders the given template and returns output. Throws a L<Template::Exception> |
f5b61ad7 |
553 | object upon error. |
1bc9fc55 |
554 | |
75dc0329 |
555 | The template variables are set to C<%$args> if C<$args> is a hashref, or |
556 | C<< $c->stash >> otherwise. In either case the variables are augmented with |
3d543eda |
557 | C<base> set to C<< $c->req->base >>, C<c> to C<$c>, and C<name> to |
1bc9fc55 |
558 | C<< $c->config->{name} >>. Alternately, the C<CATALYST_VAR> configuration item |
559 | can be defined to specify the name of a template variable through which the |
3d543eda |
560 | context reference (C<$c>) can be accessed. In this case, the C<c>, C<base>, and |
1bc9fc55 |
561 | C<name> variables are omitted. |
562 | |
f5b61ad7 |
563 | C<$template> can be anything that Template::process understands how to |
1bc9fc55 |
564 | process, including the name of a template file or a reference to a test string. |
565 | See L<Template::process|Template/process> for a full list of supported formats. |
566 | |
f59953e1 |
567 | To use the render method outside of your Catalyst app, just pass a undef context. |
cbb149dc |
568 | This can be useful for tests, for instance. |
569 | |
81b7f2a2 |
570 | It is possible to forward to the render method of a TT view from inside Catalyst |
571 | to render page fragments like this: |
572 | |
226c1dd3 |
573 | my $fragment = $c->forward("View::Web", "render", $template_name, $c->stash->{fragment_data}); |
f2ee4d6c |
574 | |
3715305f |
575 | =head3 Backwards compatibility note |
576 | |
577 | The render method used to just return the Template::Exception object, rather |
578 | than just throwing it. This is now deprecated and instead the render method |
579 | will throw an exception for new applications. |
580 | |
581 | This behaviour can be activated (and is activated in the default skeleton |
582 | configuration) by using C<< render_die => 1 >>. If you rely on the legacy |
583 | behaviour then a warning will be issued. |
584 | |
585 | To silence this warning, set C<< render_die => 0 >>, but it is recommended |
586 | you adjust your code so that it works with C<< render_die => 1 >>. |
587 | |
588 | In a future release, C<< render_die => 1 >> will become the default if |
589 | unspecified. |
590 | |
b63ddd04 |
591 | =head2 template_vars |
850ee226 |
592 | |
1bc9fc55 |
593 | Returns a list of keys/values to be used as the catalyst variables in the |
850ee226 |
594 | template. |
595 | |
b63ddd04 |
596 | =head2 config |
8077080c |
597 | |
8cd017a8 |
598 | This method allows your view subclass to pass additional settings to |
4729c102 |
599 | the TT configuration hash, or to set the options as below: |
600 | |
b63ddd04 |
601 | =head2 paths |
602 | |
603 | The list of paths TT will look for templates in. |
4729c102 |
604 | |
a6fa99df |
605 | =head2 expose_methods |
606 | |
607 | The list of methods in your View class which should be made available to the templates. |
608 | |
609 | For example: |
610 | |
582a5059 |
611 | expose_methods => [qw/uri_for_css/], |
a6fa99df |
612 | |
613 | ... |
614 | |
615 | sub uri_for_css { |
616 | my ($self, $c, $filename) = @_; |
617 | |
618 | # additional complexity like checking file exists here |
619 | |
620 | return $c->uri_for('/static/css/' . $filename); |
621 | } |
622 | |
623 | Then in the template: |
624 | |
625 | [% uri_for_css('home.css') %] |
626 | |
f5b61ad7 |
627 | =head2 C<CATALYST_VAR> |
4729c102 |
628 | |
629 | Allows you to change the name of the Catalyst context object. If set, it will also |
630 | remove the base and name aliases, so you will have access them through <context>. |
631 | |
226c1dd3 |
632 | For example, if CATALYST_VAR has been set to "Catalyst", a template might |
633 | contain: |
4729c102 |
634 | |
635 | The base is [% Catalyst.req.base %] |
636 | The name is [% Catalyst.config.name %] |
637 | |
b63ddd04 |
638 | =head2 C<TIMER> |
4729c102 |
639 | |
640 | If you have configured Catalyst for debug output, and turned on the TIMER setting, |
641 | C<Catalyst::View::TT> will enable profiling of template processing |
642 | (using L<Template::Timer>). This will embed HTML comments in the |
643 | output from your templates, such as: |
644 | |
645 | <!-- TIMER START: process mainmenu/mainmenu.ttml --> |
646 | <!-- TIMER START: include mainmenu/cssindex.tt --> |
647 | <!-- TIMER START: process mainmenu/cssindex.tt --> |
648 | <!-- TIMER END: process mainmenu/cssindex.tt (0.017279 seconds) --> |
649 | <!-- TIMER END: include mainmenu/cssindex.tt (0.017401 seconds) --> |
650 | |
651 | .... |
652 | |
653 | <!-- TIMER END: process mainmenu/footer.tt (0.003016 seconds) --> |
654 | |
655 | |
b63ddd04 |
656 | =head2 C<TEMPLATE_EXTENSION> |
4729c102 |
657 | |
747f2b6d |
658 | a sufix to add when looking for templates bases on the C<match> method in L<Catalyst::Request>. |
4729c102 |
659 | |
660 | For example: |
661 | |
6229ce0d |
662 | package MyApp::Controller::Test; |
f5b61ad7 |
663 | sub test : Local { .. } |
4729c102 |
664 | |
665 | Would by default look for a template in <root>/test/test. If you set TEMPLATE_EXTENSION to '.tt', it will look for |
666 | <root>/test/test.tt. |
667 | |
51199593 |
668 | =head2 C<PROVIDERS> |
669 | |
670 | Allows you to specify the template providers that TT will use. |
671 | |
adb2ce78 |
672 | MyApp->config( |
51199593 |
673 | name => 'MyApp', |
674 | root => MyApp->path_to('root'), |
226c1dd3 |
675 | 'View::Web' => { |
51199593 |
676 | PROVIDERS => [ |
677 | { |
678 | name => 'DBI', |
679 | args => { |
680 | DBI_DSN => 'dbi:DB2:books', |
681 | DBI_USER=> 'foo' |
682 | } |
683 | }, { |
684 | name => '_file_', |
685 | args => {} |
686 | } |
687 | ] |
688 | }, |
adb2ce78 |
689 | ); |
51199593 |
690 | |
691 | The 'name' key should correspond to the class name of the provider you |
692 | want to use. The _file_ name is a special case that represents the default |
693 | TT file-based provider. By default the name is will be prefixed with |
694 | 'Template::Provider::'. You can fully qualify the name by using a unary |
695 | plus: |
696 | |
697 | name => '+MyApp::Provider::Foo' |
698 | |
6175bba7 |
699 | You can also specify the 'copy_config' key as an arrayref, to copy those keys |
700 | from the general config, into the config for the provider: |
f5b61ad7 |
701 | |
6175bba7 |
702 | DEFAULT_ENCODING => 'utf-8', |
703 | PROVIDERS => [ |
704 | { |
705 | name => 'Encoding', |
706 | copy_config => [qw(DEFAULT_ENCODING INCLUDE_PATH)] |
707 | } |
708 | ] |
f5b61ad7 |
709 | |
6175bba7 |
710 | This can prove useful when you want to use the additional_template_paths hack |
711 | in your own provider, or if you need to use Template::Provider::Encoding |
712 | |
7bd88b61 |
713 | =head2 C<CLASS> |
714 | |
715 | Allows you to specify a custom class to use as the template class instead of |
716 | L<Template>. |
717 | |
718 | package MyApp::View::Web; |
62a61466 |
719 | use Moose; |
720 | extends 'Catalyst::View::TT'; |
7bd88b61 |
721 | |
722 | use Template::AutoFilter; |
723 | |
724 | __PACKAGE__->config({ |
725 | CLASS => 'Template::AutoFilter', |
726 | }); |
727 | |
728 | This is useful if you want to use your own subclasses of L<Template>, so you |
729 | can, for example, prevent XSS by automatically filtering all output through |
730 | C<| html>. |
731 | |
8cd017a8 |
732 | =head2 HELPERS |
733 | |
734 | The L<Catalyst::Helper::View::TT> and |
735 | L<Catalyst::Helper::View::TTSite> helper modules are provided to create |
736 | your view module. There are invoked by the F<myapp_create.pl> script: |
737 | |
226c1dd3 |
738 | $ script/myapp_create.pl view Web TT |
8cd017a8 |
739 | |
226c1dd3 |
740 | $ script/myapp_create.pl view Web TTSite |
8cd017a8 |
741 | |
742 | The L<Catalyst::Helper::View::TT> module creates a basic TT view |
743 | module. The L<Catalyst::Helper::View::TTSite> module goes a little |
744 | further. It also creates a default set of templates to get you |
745 | started. It also configures the view module to locate the templates |
746 | automatically. |
747 | |
02c64502 |
748 | =head1 NOTES |
749 | |
750 | If you are using the L<CGI> module inside your templates, you will |
751 | experience that the Catalyst server appears to hang while rendering |
752 | the web page. This is due to the debug mode of L<CGI> (which is |
753 | waiting for input in the terminal window). Turning off the |
754 | debug mode using the "-no_debug" option solves the |
755 | problem, eg.: |
756 | |
757 | [% USE CGI('-no_debug') %] |
758 | |
8077080c |
759 | =head1 SEE ALSO |
760 | |
8cd017a8 |
761 | L<Catalyst>, L<Catalyst::Helper::View::TT>, |
762 | L<Catalyst::Helper::View::TTSite>, L<Template::Manual> |
8077080c |
763 | |
c0eb0527 |
764 | =head1 AUTHORS |
8077080c |
765 | |
766 | Sebastian Riedel, C<sri@cpan.org> |
c0eb0527 |
767 | |
d938377b |
768 | Marcus Ramberg, C<mramberg@cpan.org> |
c0eb0527 |
769 | |
722fede4 |
770 | Jesse Sheidlower, C<jester@panix.com> |
c0eb0527 |
771 | |
8cd017a8 |
772 | Andy Wardley, C<abw@cpan.org> |
8077080c |
773 | |
0696d072 |
774 | Luke Saunders, C<luke.saunders@gmail.com> |
775 | |
8077080c |
776 | =head1 COPYRIGHT |
777 | |
f5b61ad7 |
778 | This program is free software. You can redistribute it and/or modify it |
2774dc77 |
779 | under the same terms as Perl itself. |
8077080c |
780 | |
781 | =cut |