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8077080c |
1 | package Catalyst::View::TT; |
2 | |
3 | use strict; |
6229ce0d |
4 | use warnings; |
5 | |
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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/; |
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12 | |
85ea459d |
13 | our $VERSION = '0.36'; |
14 | $VERSION = eval $VERSION; |
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15 | |
16 | __PACKAGE__->mk_accessors('template'); |
46cdc47d |
17 | __PACKAGE__->mk_accessors('expose_methods'); |
e2bbd784 |
18 | __PACKAGE__->mk_accessors('include_path'); |
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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 | |
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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( |
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35 | # any TT configuration items go here |
36 | INCLUDE_PATH => [ |
37 | MyApp->path_to( 'root', 'src' ), |
38 | MyApp->path_to( 'root', 'lib' ), |
39 | ], |
40 | TEMPLATE_EXTENSION => '.tt', |
41 | CATALYST_VAR => 'c', |
42 | TIMER => 0, |
43 | # Not set by default |
44 | PRE_PROCESS => 'config/main', |
45 | WRAPPER => 'site/wrapper', |
46 | render_die => 1, # Default for new apps, see render method docs |
a6fa99df |
47 | expose_methods => [qw/method_in_view_class/], |
ae035767 |
48 | ); |
f5b61ad7 |
49 | |
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50 | # render view from lib/MyApp.pm or lib/MyApp::Controller::SomeController.pm |
f5b61ad7 |
51 | |
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52 | sub message : Global { |
94b3529a |
53 | my ( $self, $c ) = @_; |
54 | $c->stash->{template} = 'message.tt2'; |
55 | $c->stash->{message} = 'Hello World!'; |
226c1dd3 |
56 | $c->forward( $c->view('Web') ); |
8cd017a8 |
57 | } |
8077080c |
58 | |
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59 | # access variables from template |
60 | |
61 | The message is: [% message %]. |
f5b61ad7 |
62 | |
8cd017a8 |
63 | # example when CATALYST_VAR is set to 'Catalyst' |
f5b61ad7 |
64 | Context is [% Catalyst %] |
65 | The base is [% Catalyst.req.base %] |
66 | The name is [% Catalyst.config.name %] |
67 | |
8cd017a8 |
68 | # example when CATALYST_VAR isn't set |
69 | Context is [% c %] |
70 | The base is [% base %] |
71 | The name is [% name %] |
72 | |
bd4ee63a |
73 | =cut |
74 | |
75 | sub _coerce_paths { |
76 | my ( $paths, $dlim ) = shift; |
77 | return () if ( !$paths ); |
78 | return @{$paths} if ( ref $paths eq 'ARRAY' ); |
79 | |
80 | # tweak delim to ignore C:/ |
81 | unless ( defined $dlim ) { |
82 | $dlim = ( $^O eq 'MSWin32' ) ? ':(?!\\/)' : ':'; |
83 | } |
84 | return split( /$dlim/, $paths ); |
85 | } |
86 | |
87 | sub new { |
88 | my ( $class, $c, $arguments ) = @_; |
89 | my $config = { |
90 | EVAL_PERL => 0, |
91 | TEMPLATE_EXTENSION => '', |
92 | %{ $class->config }, |
93 | %{$arguments}, |
94 | }; |
95 | if ( ! (ref $config->{INCLUDE_PATH} eq 'ARRAY') ) { |
96 | my $delim = $config->{DELIMITER}; |
97 | my @include_path |
98 | = _coerce_paths( $config->{INCLUDE_PATH}, $delim ); |
99 | if ( !@include_path ) { |
100 | my $root = $c->config->{root}; |
101 | my $base = Path::Class::dir( $root, 'base' ); |
102 | @include_path = ( "$root", "$base" ); |
103 | } |
104 | $config->{INCLUDE_PATH} = \@include_path; |
105 | } |
106 | |
107 | # if we're debugging and/or the TIMER option is set, then we install |
108 | # Template::Timer as a custom CONTEXT object, but only if we haven't |
109 | # already got a custom CONTEXT defined |
110 | |
111 | if ( $config->{TIMER} ) { |
112 | if ( $config->{CONTEXT} ) { |
113 | $c->log->error( |
114 | 'Cannot use Template::Timer - a TT CONTEXT is already defined' |
115 | ); |
116 | } |
117 | else { |
118 | $config->{CONTEXT} = Template::Timer->new(%$config); |
119 | } |
120 | } |
121 | |
122 | if ( $c->debug && $config->{DUMP_CONFIG} ) { |
9e739e1e |
123 | $c->log->debug( "TT Config: ", dump($config) ); |
bd4ee63a |
124 | } |
6175bba7 |
125 | |
e8693f1b |
126 | my $self = $class->next::method( |
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127 | $c, { %$config }, |
6175bba7 |
128 | ); |
129 | |
130 | # Set base include paths. Local'd in render if needed |
131 | $self->include_path($config->{INCLUDE_PATH}); |
f5b61ad7 |
132 | |
46cdc47d |
133 | $self->expose_methods($config->{expose_methods}); |
6175bba7 |
134 | $self->config($config); |
135 | |
136 | # Creation of template outside of call to new so that we can pass [ $self ] |
137 | # as INCLUDE_PATH config item, which then gets ->paths() called to get list |
138 | # of include paths to search for templates. |
f5b61ad7 |
139 | |
6175bba7 |
140 | # Use a weakend copy of self so we dont have loops preventing GC from working |
141 | my $copy = $self; |
142 | Scalar::Util::weaken($copy); |
143 | $config->{INCLUDE_PATH} = [ sub { $copy->paths } ]; |
144 | |
bd4ee63a |
145 | if ( $config->{PROVIDERS} ) { |
146 | my @providers = (); |
147 | if ( ref($config->{PROVIDERS}) eq 'ARRAY') { |
148 | foreach my $p (@{$config->{PROVIDERS}}) { |
149 | my $pname = $p->{name}; |
150 | my $prov = 'Template::Provider'; |
151 | if($pname eq '_file_') |
152 | { |
153 | $p->{args} = { %$config }; |
154 | } |
155 | else |
156 | { |
51199593 |
157 | if($pname =~ s/^\+//) { |
158 | $prov = $pname; |
159 | } |
160 | else |
161 | { |
162 | $prov .= "::$pname"; |
163 | } |
6175bba7 |
164 | # We copy the args people want from the config |
165 | # to the args |
166 | $p->{args} ||= {}; |
167 | if ($p->{copy_config}) { |
168 | map { $p->{args}->{$_} = $config->{$_} } |
169 | grep { exists $config->{$_} } |
170 | @{ $p->{copy_config} }; |
171 | } |
bd4ee63a |
172 | } |
fc0ffed0 |
173 | local $@; |
bd4ee63a |
174 | eval "require $prov"; |
175 | if(!$@) { |
176 | push @providers, "$prov"->new($p->{args}); |
177 | } |
178 | else |
179 | { |
180 | $c->log->warn("Can't load $prov, ($@)"); |
181 | } |
182 | } |
183 | } |
184 | delete $config->{PROVIDERS}; |
185 | if(@providers) { |
186 | $config->{LOAD_TEMPLATES} = \@providers; |
187 | } |
188 | } |
f5b61ad7 |
189 | |
190 | $self->{template} = |
bd4ee63a |
191 | Template->new($config) || do { |
192 | my $error = Template->error(); |
193 | $c->log->error($error); |
194 | $c->error($error); |
195 | return undef; |
196 | }; |
197 | |
198 | |
199 | return $self; |
200 | } |
201 | |
202 | sub process { |
203 | my ( $self, $c ) = @_; |
204 | |
205 | my $template = $c->stash->{template} |
206 | || $c->action . $self->config->{TEMPLATE_EXTENSION}; |
207 | |
208 | unless (defined $template) { |
209 | $c->log->debug('No template specified for rendering') if $c->debug; |
210 | return 0; |
211 | } |
212 | |
fc0ffed0 |
213 | local $@; |
cad820fe |
214 | my $output = eval { $self->render($c, $template) }; |
215 | if (my $err = $@) { |
c5c3c6bd |
216 | return $self->_rendering_error($c, $template . ': ' . $err); |
316f014a |
217 | } |
218 | if (blessed($output) && $output->isa('Template::Exception')) { |
219 | $self->_rendering_error($c, $output); |
bd4ee63a |
220 | } |
221 | |
222 | unless ( $c->response->content_type ) { |
223 | $c->response->content_type('text/html; charset=utf-8'); |
224 | } |
225 | |
226 | $c->response->body($output); |
227 | |
228 | return 1; |
229 | } |
230 | |
316f014a |
231 | sub _rendering_error { |
232 | my ($self, $c, $err) = @_; |
233 | my $error = qq/Couldn't render template "$err"/; |
234 | $c->log->error($error); |
235 | $c->error($error); |
236 | return 0; |
237 | } |
238 | |
bd4ee63a |
239 | sub render { |
240 | my ($self, $c, $template, $args) = @_; |
241 | |
cbb149dc |
242 | $c->log->debug(qq/Rendering template "$template"/) if $c && $c->debug; |
bd4ee63a |
243 | |
244 | my $output; |
f5b61ad7 |
245 | my $vars = { |
bd4ee63a |
246 | (ref $args eq 'HASH' ? %$args : %{ $c->stash() }), |
247 | $self->template_vars($c) |
248 | }; |
249 | |
f5b61ad7 |
250 | local $self->{include_path} = |
bd4ee63a |
251 | [ @{ $vars->{additional_template_paths} }, @{ $self->{include_path} } ] |
252 | if ref $vars->{additional_template_paths}; |
253 | |
596ff245 |
254 | unless ( $self->template->process( $template, $vars, \$output ) ) { |
255 | if (exists $self->{render_die}) { |
256 | die $self->template->error if $self->{render_die}; |
257 | return $self->template->error; |
258 | } |
131a8e59 |
259 | $c->log->debug('The Catalyst::View::TT render() method will start dying on error in a future release. Unless you are calling the render() method manually, you probably want the new behaviour, so set render_die => 1 in config for ' . blessed($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 |
260 | return $self->template->error; |
261 | } |
cad820fe |
262 | return $output; |
bd4ee63a |
263 | } |
264 | |
265 | sub template_vars { |
266 | my ( $self, $c ) = @_; |
267 | |
cbb149dc |
268 | return () unless $c; |
bd4ee63a |
269 | my $cvar = $self->config->{CATALYST_VAR}; |
270 | |
a6fa99df |
271 | my %vars = defined $cvar |
bd4ee63a |
272 | ? ( $cvar => $c ) |
273 | : ( |
274 | c => $c, |
275 | base => $c->req->base, |
276 | name => $c->config->{name} |
a6fa99df |
277 | ); |
278 | |
46cdc47d |
279 | if ($self->expose_methods) { |
a6fa99df |
280 | my $meta = $self->meta; |
46cdc47d |
281 | foreach my $method_name (@{$self->expose_methods}) { |
1cb1d672 |
282 | my $method = $meta->find_method_by_name( $method_name ); |
a6fa99df |
283 | unless ($method) { |
284 | Catalyst::Exception->throw( "$method_name not found in TT view" ); |
285 | } |
286 | my $method_body = $method->body; |
4a70bc59 |
287 | my $weak_ctx = $c; |
288 | weaken $weak_ctx; |
a6fa99df |
289 | my $sub = sub { |
4a70bc59 |
290 | $self->$method_body($weak_ctx, @_); |
a6fa99df |
291 | }; |
292 | $vars{$method_name} = $sub; |
293 | } |
294 | } |
295 | return %vars; |
bd4ee63a |
296 | } |
297 | |
bd4ee63a |
298 | 1; |
299 | |
300 | __END__ |
301 | |
8cd017a8 |
302 | =head1 DESCRIPTION |
303 | |
304 | This is the Catalyst view class for the L<Template Toolkit|Template>. |
305 | Your application should defined a view class which is a subclass of |
226c1dd3 |
306 | this module. Throughout this manual it will be assumed that your application |
307 | is named F<MyApp> and you are creating a TT view named F<Web>; these names |
308 | are placeholders and should always be replaced with whatever name you've |
309 | chosen for your application and your view. The easiest way to create a TT |
310 | view class is through the F<myapp_create.pl> script that is created along |
311 | with the application: |
8cd017a8 |
312 | |
226c1dd3 |
313 | $ script/myapp_create.pl view Web TT |
8cd017a8 |
314 | |
226c1dd3 |
315 | This creates a F<MyApp::View::Web.pm> module in the F<lib> directory (again, |
8cd017a8 |
316 | replacing C<MyApp> with the name of your application) which looks |
317 | something like this: |
318 | |
226c1dd3 |
319 | package FooBar::View::Web; |
f5b61ad7 |
320 | |
8cd017a8 |
321 | use strict; |
c18eae32 |
322 | use warnings; |
f5b61ad7 |
323 | |
c18eae32 |
324 | use base 'Catalyst::View::TT'; |
8077080c |
325 | |
a1b7968f |
326 | __PACKAGE__->config(DEBUG => 'all'); |
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327 | |
8cd017a8 |
328 | Now you can modify your action handlers in the main application and/or |
329 | controllers to forward to your view class. You might choose to do this |
330 | in the end() method, for example, to automatically forward all actions |
331 | to the TT view class. |
722fede4 |
332 | |
8cd017a8 |
333 | # In MyApp or MyApp::Controller::SomeController |
f5b61ad7 |
334 | |
8cd017a8 |
335 | sub end : Private { |
94b3529a |
336 | my( $self, $c ) = @_; |
226c1dd3 |
337 | $c->forward( $c->view('Web') ); |
8cd017a8 |
338 | } |
8077080c |
339 | |
2844488f |
340 | But if you are using the standard auto-generated end action, you don't even need |
341 | to do this! |
342 | |
343 | # in MyApp::Controller::Root |
344 | sub end : ActionClass('RenderView') {} # no need to change this line |
345 | |
346 | # in MyApp.pm |
347 | __PACKAGE__->config( |
348 | ... |
226c1dd3 |
349 | default_view => 'Web', |
2844488f |
350 | ); |
351 | |
352 | This will Just Work. And it has the advantages that: |
353 | |
354 | =over 4 |
355 | |
356 | =item * |
357 | |
358 | If you want to use a different view for a given request, just set |
359 | << $c->stash->{current_view} >>. (See L<Catalyst>'s C<< $c->view >> method |
360 | for details. |
361 | |
362 | =item * |
363 | |
364 | << $c->res->redirect >> is handled by default. If you just forward to |
226c1dd3 |
365 | C<View::Web> in your C<end> routine, you could break this by sending additional |
2844488f |
366 | content. |
367 | |
368 | =back |
369 | |
370 | See L<Catalyst::Action::RenderView> for more details. |
371 | |
8cd017a8 |
372 | =head2 CONFIGURATION |
4687ac0d |
373 | |
8cd017a8 |
374 | There are a three different ways to configure your view class. The |
375 | first way is to call the C<config()> method in the view subclass. This |
376 | happens when the module is first loaded. |
8077080c |
377 | |
226c1dd3 |
378 | package MyApp::View::Web; |
f5b61ad7 |
379 | |
8cd017a8 |
380 | use strict; |
381 | use base 'Catalyst::View::TT'; |
722fede4 |
382 | |
226c1dd3 |
383 | __PACKAGE__->config({ |
7d8aa5ec |
384 | INCLUDE_PATH => [ |
385 | MyApp->path_to( 'root', 'templates', 'lib' ), |
386 | MyApp->path_to( 'root', 'templates', 'src' ), |
387 | ], |
8cd017a8 |
388 | PRE_PROCESS => 'config/main', |
389 | WRAPPER => 'site/wrapper', |
390 | }); |
391 | |
226c1dd3 |
392 | You may also override the configuration provided in the view class by adding |
393 | a 'View::Web' section to your application config (either in the application |
394 | main class, or in your configuration file). This should be reserved for |
395 | deployment-specific concerns. For example: |
8cd017a8 |
396 | |
226c1dd3 |
397 | # MyApp_local.conf (Config::General format) |
f5b61ad7 |
398 | |
226c1dd3 |
399 | <View Web> |
400 | WRAPPER "custom_wrapper" |
401 | INCLUDE_PATH __path_to('root/templates/custom_site')__ |
402 | INCLUDE_PATH __path_to('root/templates')__ |
403 | </View> |
8cd017a8 |
404 | |
226c1dd3 |
405 | might be used as part of a simple way to deploy different instances of the |
406 | same application with different themes. |
8cd017a8 |
407 | |
e2bbd784 |
408 | =head2 DYNAMIC INCLUDE_PATH |
409 | |
f7dfca06 |
410 | Sometimes it is desirable to modify INCLUDE_PATH for your templates at run time. |
f5b61ad7 |
411 | |
f7dfca06 |
412 | Additional paths can be added to the start of INCLUDE_PATH via the stash as |
413 | follows: |
414 | |
415 | $c->stash->{additional_template_paths} = |
416 | [$c->config->{root} . '/test_include_path']; |
417 | |
418 | If you need to add paths to the end of INCLUDE_PATH, there is also an |
419 | include_path() accessor available: |
420 | |
226c1dd3 |
421 | push( @{ $c->view('Web')->include_path }, qw/path/ ); |
f7dfca06 |
422 | |
423 | Note that if you use include_path() to add extra paths to INCLUDE_PATH, you |
424 | MUST check for duplicate paths. Without such checking, the above code will add |
425 | "path" to INCLUDE_PATH at every request, causing a memory leak. |
426 | |
427 | A safer approach is to use include_path() to overwrite the array of paths |
428 | rather than adding to it. This eliminates both the need to perform duplicate |
429 | checking and the chance of a memory leak: |
e2bbd784 |
430 | |
226c1dd3 |
431 | @{ $c->view('Web')->include_path } = qw/path another_path/; |
e2bbd784 |
432 | |
f5b61ad7 |
433 | If you are calling C<render> directly then you can specify dynamic paths by |
9d574573 |
434 | having a C<additional_template_paths> key with a value of additonal directories |
1bc9fc55 |
435 | to search. See L<CAPTURING TEMPLATE OUTPUT> for an example showing this. |
436 | |
8cd017a8 |
437 | =head2 RENDERING VIEWS |
438 | |
439 | The view plugin renders the template specified in the C<template> |
f5b61ad7 |
440 | item in the stash. |
8cd017a8 |
441 | |
442 | sub message : Global { |
94b3529a |
443 | my ( $self, $c ) = @_; |
444 | $c->stash->{template} = 'message.tt2'; |
226c1dd3 |
445 | $c->forward( $c->view('Web') ); |
8cd017a8 |
446 | } |
722fede4 |
447 | |
c969f23a |
448 | If a stash item isn't defined, then it instead uses the |
449 | stringification of the action dispatched to (as defined by $c->action) |
450 | in the above example, this would be C<message>, but because the default |
451 | is to append '.tt', it would load C<root/message.tt>. |
8cd017a8 |
452 | |
453 | The items defined in the stash are passed to the Template Toolkit for |
454 | use as template variables. |
455 | |
8cd017a8 |
456 | sub default : Private { |
94b3529a |
457 | my ( $self, $c ) = @_; |
458 | $c->stash->{template} = 'message.tt2'; |
459 | $c->stash->{message} = 'Hello World!'; |
226c1dd3 |
460 | $c->forward( $c->view('Web') ); |
8cd017a8 |
461 | } |
7b592fc7 |
462 | |
8cd017a8 |
463 | A number of other template variables are also added: |
8077080c |
464 | |
8cd017a8 |
465 | c A reference to the context object, $c |
466 | base The URL base, from $c->req->base() |
467 | name The application name, from $c->config->{ name } |
468 | |
469 | These can be accessed from the template in the usual way: |
470 | |
471 | <message.tt2>: |
472 | |
473 | The message is: [% message %] |
474 | The base is [% base %] |
475 | The name is [% name %] |
476 | |
8cd017a8 |
477 | |
1bc9fc55 |
478 | The output generated by the template is stored in C<< $c->response->body >>. |
479 | |
480 | =head2 CAPTURING TEMPLATE OUTPUT |
481 | |
482 | If you wish to use the output of a template for some other purpose than |
483 | displaying in the response, e.g. for sending an email, this is possible using |
484 | L<Catalyst::Plugin::Email> and the L<render> method: |
485 | |
486 | sub send_email : Local { |
487 | my ($self, $c) = @_; |
f5b61ad7 |
488 | |
1bc9fc55 |
489 | $c->email( |
490 | header => [ |
491 | To => 'me@localhost', |
492 | Subject => 'A TT Email', |
493 | ], |
226c1dd3 |
494 | body => $c->view('Web')->render($c, 'email.tt', { |
9d574573 |
495 | additional_template_paths => [ $c->config->{root} . '/email_templates'], |
1bc9fc55 |
496 | email_tmpl_param1 => 'foo' |
497 | } |
498 | ), |
499 | ); |
500 | # Redirect or display a message |
501 | } |
8cd017a8 |
502 | |
503 | =head2 TEMPLATE PROFILING |
504 | |
1bc9fc55 |
505 | See L<C<TIMER>> property of the L<config> method. |
506 | |
caa61517 |
507 | =head2 METHODS |
8077080c |
508 | |
b63ddd04 |
509 | =head2 new |
2774dc77 |
510 | |
f5b61ad7 |
511 | The constructor for the TT view. Sets up the template provider, |
2774dc77 |
512 | and reads the application config. |
513 | |
81b7f2a2 |
514 | =head2 process($c) |
8077080c |
515 | |
1bc9fc55 |
516 | Renders the template specified in C<< $c->stash->{template} >> or |
ad50568f |
517 | C<< $c->action >> (the private name of the matched action). Calls L<render> to |
1bc9fc55 |
518 | perform actual rendering. Output is stored in C<< $c->response->body >>. |
8077080c |
519 | |
81b7f2a2 |
520 | It is possible to forward to the process method of a TT view from inside |
521 | Catalyst like this: |
522 | |
226c1dd3 |
523 | $c->forward('View::Web'); |
81b7f2a2 |
524 | |
525 | N.B. This is usually done automatically by L<Catalyst::Action::RenderView>. |
f2ee4d6c |
526 | |
b63ddd04 |
527 | =head2 render($c, $template, \%args) |
1bc9fc55 |
528 | |
cad820fe |
529 | Renders the given template and returns output. Throws a L<Template::Exception> |
f5b61ad7 |
530 | object upon error. |
1bc9fc55 |
531 | |
75dc0329 |
532 | The template variables are set to C<%$args> if C<$args> is a hashref, or |
533 | C<< $c->stash >> otherwise. In either case the variables are augmented with |
3d543eda |
534 | C<base> set to C<< $c->req->base >>, C<c> to C<$c>, and C<name> to |
1bc9fc55 |
535 | C<< $c->config->{name} >>. Alternately, the C<CATALYST_VAR> configuration item |
536 | can be defined to specify the name of a template variable through which the |
3d543eda |
537 | context reference (C<$c>) can be accessed. In this case, the C<c>, C<base>, and |
1bc9fc55 |
538 | C<name> variables are omitted. |
539 | |
f5b61ad7 |
540 | C<$template> can be anything that Template::process understands how to |
1bc9fc55 |
541 | process, including the name of a template file or a reference to a test string. |
542 | See L<Template::process|Template/process> for a full list of supported formats. |
543 | |
f59953e1 |
544 | To use the render method outside of your Catalyst app, just pass a undef context. |
cbb149dc |
545 | This can be useful for tests, for instance. |
546 | |
81b7f2a2 |
547 | It is possible to forward to the render method of a TT view from inside Catalyst |
548 | to render page fragments like this: |
549 | |
226c1dd3 |
550 | my $fragment = $c->forward("View::Web", "render", $template_name, $c->stash->{fragment_data}); |
f2ee4d6c |
551 | |
3715305f |
552 | =head3 Backwards compatibility note |
553 | |
554 | The render method used to just return the Template::Exception object, rather |
555 | than just throwing it. This is now deprecated and instead the render method |
556 | will throw an exception for new applications. |
557 | |
558 | This behaviour can be activated (and is activated in the default skeleton |
559 | configuration) by using C<< render_die => 1 >>. If you rely on the legacy |
560 | behaviour then a warning will be issued. |
561 | |
562 | To silence this warning, set C<< render_die => 0 >>, but it is recommended |
563 | you adjust your code so that it works with C<< render_die => 1 >>. |
564 | |
565 | In a future release, C<< render_die => 1 >> will become the default if |
566 | unspecified. |
567 | |
b63ddd04 |
568 | =head2 template_vars |
850ee226 |
569 | |
1bc9fc55 |
570 | Returns a list of keys/values to be used as the catalyst variables in the |
850ee226 |
571 | template. |
572 | |
b63ddd04 |
573 | =head2 config |
8077080c |
574 | |
8cd017a8 |
575 | This method allows your view subclass to pass additional settings to |
4729c102 |
576 | the TT configuration hash, or to set the options as below: |
577 | |
b63ddd04 |
578 | =head2 paths |
579 | |
580 | The list of paths TT will look for templates in. |
4729c102 |
581 | |
a6fa99df |
582 | =head2 expose_methods |
583 | |
584 | The list of methods in your View class which should be made available to the templates. |
585 | |
586 | For example: |
587 | |
582a5059 |
588 | expose_methods => [qw/uri_for_css/], |
a6fa99df |
589 | |
590 | ... |
591 | |
592 | sub uri_for_css { |
593 | my ($self, $c, $filename) = @_; |
594 | |
595 | # additional complexity like checking file exists here |
596 | |
597 | return $c->uri_for('/static/css/' . $filename); |
598 | } |
599 | |
600 | Then in the template: |
601 | |
602 | [% uri_for_css('home.css') %] |
603 | |
f5b61ad7 |
604 | =head2 C<CATALYST_VAR> |
4729c102 |
605 | |
606 | Allows you to change the name of the Catalyst context object. If set, it will also |
607 | remove the base and name aliases, so you will have access them through <context>. |
608 | |
226c1dd3 |
609 | For example, if CATALYST_VAR has been set to "Catalyst", a template might |
610 | contain: |
4729c102 |
611 | |
612 | The base is [% Catalyst.req.base %] |
613 | The name is [% Catalyst.config.name %] |
614 | |
b63ddd04 |
615 | =head2 C<TIMER> |
4729c102 |
616 | |
617 | If you have configured Catalyst for debug output, and turned on the TIMER setting, |
618 | C<Catalyst::View::TT> will enable profiling of template processing |
619 | (using L<Template::Timer>). This will embed HTML comments in the |
620 | output from your templates, such as: |
621 | |
622 | <!-- TIMER START: process mainmenu/mainmenu.ttml --> |
623 | <!-- TIMER START: include mainmenu/cssindex.tt --> |
624 | <!-- TIMER START: process mainmenu/cssindex.tt --> |
625 | <!-- TIMER END: process mainmenu/cssindex.tt (0.017279 seconds) --> |
626 | <!-- TIMER END: include mainmenu/cssindex.tt (0.017401 seconds) --> |
627 | |
628 | .... |
629 | |
630 | <!-- TIMER END: process mainmenu/footer.tt (0.003016 seconds) --> |
631 | |
632 | |
b63ddd04 |
633 | =head2 C<TEMPLATE_EXTENSION> |
4729c102 |
634 | |
747f2b6d |
635 | a sufix to add when looking for templates bases on the C<match> method in L<Catalyst::Request>. |
4729c102 |
636 | |
637 | For example: |
638 | |
6229ce0d |
639 | package MyApp::Controller::Test; |
f5b61ad7 |
640 | sub test : Local { .. } |
4729c102 |
641 | |
642 | Would by default look for a template in <root>/test/test. If you set TEMPLATE_EXTENSION to '.tt', it will look for |
643 | <root>/test/test.tt. |
644 | |
51199593 |
645 | =head2 C<PROVIDERS> |
646 | |
647 | Allows you to specify the template providers that TT will use. |
648 | |
649 | MyApp->config({ |
650 | name => 'MyApp', |
651 | root => MyApp->path_to('root'), |
226c1dd3 |
652 | 'View::Web' => { |
51199593 |
653 | PROVIDERS => [ |
654 | { |
655 | name => 'DBI', |
656 | args => { |
657 | DBI_DSN => 'dbi:DB2:books', |
658 | DBI_USER=> 'foo' |
659 | } |
660 | }, { |
661 | name => '_file_', |
662 | args => {} |
663 | } |
664 | ] |
665 | }, |
666 | }); |
667 | |
668 | The 'name' key should correspond to the class name of the provider you |
669 | want to use. The _file_ name is a special case that represents the default |
670 | TT file-based provider. By default the name is will be prefixed with |
671 | 'Template::Provider::'. You can fully qualify the name by using a unary |
672 | plus: |
673 | |
674 | name => '+MyApp::Provider::Foo' |
675 | |
6175bba7 |
676 | You can also specify the 'copy_config' key as an arrayref, to copy those keys |
677 | from the general config, into the config for the provider: |
f5b61ad7 |
678 | |
6175bba7 |
679 | DEFAULT_ENCODING => 'utf-8', |
680 | PROVIDERS => [ |
681 | { |
682 | name => 'Encoding', |
683 | copy_config => [qw(DEFAULT_ENCODING INCLUDE_PATH)] |
684 | } |
685 | ] |
f5b61ad7 |
686 | |
6175bba7 |
687 | This can prove useful when you want to use the additional_template_paths hack |
688 | in your own provider, or if you need to use Template::Provider::Encoding |
689 | |
8cd017a8 |
690 | =head2 HELPERS |
691 | |
692 | The L<Catalyst::Helper::View::TT> and |
693 | L<Catalyst::Helper::View::TTSite> helper modules are provided to create |
694 | your view module. There are invoked by the F<myapp_create.pl> script: |
695 | |
226c1dd3 |
696 | $ script/myapp_create.pl view Web TT |
8cd017a8 |
697 | |
226c1dd3 |
698 | $ script/myapp_create.pl view Web TTSite |
8cd017a8 |
699 | |
700 | The L<Catalyst::Helper::View::TT> module creates a basic TT view |
701 | module. The L<Catalyst::Helper::View::TTSite> module goes a little |
702 | further. It also creates a default set of templates to get you |
703 | started. It also configures the view module to locate the templates |
704 | automatically. |
705 | |
02c64502 |
706 | =head1 NOTES |
707 | |
708 | If you are using the L<CGI> module inside your templates, you will |
709 | experience that the Catalyst server appears to hang while rendering |
710 | the web page. This is due to the debug mode of L<CGI> (which is |
711 | waiting for input in the terminal window). Turning off the |
712 | debug mode using the "-no_debug" option solves the |
713 | problem, eg.: |
714 | |
715 | [% USE CGI('-no_debug') %] |
716 | |
8077080c |
717 | =head1 SEE ALSO |
718 | |
8cd017a8 |
719 | L<Catalyst>, L<Catalyst::Helper::View::TT>, |
720 | L<Catalyst::Helper::View::TTSite>, L<Template::Manual> |
8077080c |
721 | |
c0eb0527 |
722 | =head1 AUTHORS |
8077080c |
723 | |
724 | Sebastian Riedel, C<sri@cpan.org> |
c0eb0527 |
725 | |
d938377b |
726 | Marcus Ramberg, C<mramberg@cpan.org> |
c0eb0527 |
727 | |
722fede4 |
728 | Jesse Sheidlower, C<jester@panix.com> |
c0eb0527 |
729 | |
8cd017a8 |
730 | Andy Wardley, C<abw@cpan.org> |
8077080c |
731 | |
0696d072 |
732 | Luke Saunders, C<luke.saunders@gmail.com> |
733 | |
8077080c |
734 | =head1 COPYRIGHT |
735 | |
f5b61ad7 |
736 | This program is free software. You can redistribute it and/or modify it |
2774dc77 |
737 | under the same terms as Perl itself. |
8077080c |
738 | |
739 | =cut |