5 use parent qw(Rose::Object);
10 use Rose::Object::MakeMethods::Generic
12 scalar => [ qw(controller) ],
13 'scalar --get_set_init' => [ qw(_actions _flash _error) ],
16 my %supported_methods = (
24 # DOM insertion, around
30 # DOM insertion, inside
38 # DOM insertion, outside
69 focus => 1, # kivi.set_focus(<TARGET>)
71 # Generic Event Handling ## pattern: $(<TARGET>).<FUNCTION>(<ARG1>, kivi.get_function_by_name(<ARG2>))
76 # ## jQuery UI dialog plugin ## pattern: $(<TARGET>).dialog('<FUNCTION>')
78 # Opening and closing and closing a popup
79 'dialog:open' => 1, # kivi.popup_dialog(<TARGET>)
82 # ## jQuery Form plugin ##
83 'ajaxForm' => 1, # pattern: $(<TARGET>).ajaxForm({ success: eval_json_result })
85 # ## jstree plugin ## pattern: $.jstree._reference($(<TARGET>)).<FUNCTION>(<ARGS>)
87 # Operations on the whole tree
91 # Opening and closing nodes
92 'jstree:open_node' => 2,
93 'jstree:open_all' => 2,
94 'jstree:close_node' => 2,
95 'jstree:close_all' => 2,
96 'jstree:toggle_node' => 2,
97 'jstree:save_opened' => 1,
101 'jstree:create_node' => 4,
102 'jstree:rename_node' => 3,
103 'jstree:delete_node' => 2,
104 'jstree:move_node' => 5,
106 # Selecting nodes (from the 'ui' plugin to jstree)
107 'jstree:select_node' => 2, # $.jstree._reference($(<TARGET>)).<FUNCTION>(<ARGS>, true)
108 'jstree:deselect_node' => 2,
109 'jstree:deselect_all' => 1,
111 # ## ckeditor stuff ##
112 'focus_ckeditor' => 1, # kivi.focus_ckeditor_when_ready(<TARGET>)
115 redirect_to => 1, # window.location.href = <TARGET>
117 flash => 2, # kivi.display_flash(<TARGET>, <ARGS>)
118 reinit_widgets => 0, # kivi.reinit_widgets()
119 run => -1, # kivi.run(<TARGET>, <ARGS>)
120 run_once_for => 3, # kivi.run_once_for(<TARGET>, <ARGS>)
122 scroll_into_view => 1, # $(<TARGET>)[0].scrollIntoView()
125 my %trim_target_for = map { ($_ => 1) } qw(insertAfter insertBefore appendTo prependTo);
130 my ($self, @args) = @_;
132 my $method = $AUTOLOAD;
134 return if $method eq 'DESTROY';
135 return $self->action($method, @args);
139 my ($self, $method, @args) = @_;
141 $method = (delete($self->{_prefix}) || '') . $method;
142 my $num_args = $supported_methods{$method};
144 croak "Unsupported jQuery action: $method" unless defined $num_args;
147 croak "Parameter count mismatch for $method(actual: " . scalar(@args) . " wanted: $num_args)" if scalar(@args) != $num_args;
150 croak "Parameter count mismatch for $method(actual: " . scalar(@args) . " wanted at least: $num_args)" if scalar(@args) < $num_args;
151 $num_args = scalar @args;
154 foreach my $idx (0..$num_args - 1) {
155 # Force flattening from SL::Presenter::EscapedText.
156 $args[$idx] = "" . $args[$idx] if ref($args[$idx]) eq 'SL::Presenter::EscapedText';
159 # Trim leading whitespaces for certain jQuery functions that operate
160 # on HTML code: $("<p>test</p>").appendTo('#some-id'). jQuery croaks
161 # on leading whitespaces, e.g. on $(" <p>test</p>").
162 $args[0] =~ s{^\s+}{} if $trim_target_for{$method};
164 push @{ $self->_actions }, [ $method, @args ];
170 my ($self, $condition, @args) = @_;
172 return $condition ? $self->action(@args) : $self;
190 return SL::JSON::to_json({ error => $self->_error }) if $self->_error;
191 return SL::JSON::to_json({ eval_actions => $self->_actions });
196 return $self->_actions;
200 my ($self, $controller) = @_;
201 $controller ||= $self->controller;
202 $self->reinit_widgets if $::request->presenter->need_reinit_widgets;
203 return $controller->render(\$self->to_json, { type => 'json' });
208 $self->{_prefix} = 'jstree:';
214 $self->{_prefix} = 'dialog:';
220 $self->{_prefix} = 'ckeditor:';
225 my ($self, $type, @messages) = @_;
227 my $message = join ' ', grep { $_ } @messages;
229 if (!$self->_flash->{$type}) {
230 $self->_flash->{$type} = [ 'flash', $type, $message ];
231 push @{ $self->_actions }, $self->_flash->{$type};
233 $self->_flash->{$type}->[-1] .= ' ' . $message;
240 my ($self, @messages) = @_;
242 $self->_error(join ' ', grep { $_ } ($self->_error, @messages));
256 SL::ClientJS - Easy programmatic client-side JavaScript generation
261 First some JavaScript code:
263 // In the client generate an AJAX request whose 'success' handler
264 // calls "eval_json_result(data)":
266 action: "SomeController/the_action",
267 id: $('#some_input_field').val()
269 $.post("controller.pl", data, eval_json_result);
273 # In the controller itself. First, make sure that the "client_js.js"
274 # is loaded. This must be done when the whole side is loaded, so
275 # it's not in the action called by the AJAX request shown above.
276 $::request->layout->use_javascript('client_js.js');
278 # Now in that action called via AJAX:
279 sub action_the_action {
282 # Create a new client-side JS object and do stuff with it!
283 my $js = SL::ClientJS->new(controller => $self);
285 # Show some element on the page:
286 $js->show('#usually_hidden');
288 # Set to hidden inputs. Yes, calls can be chained!
289 $js->val('#hidden_id', $self->new_id)
290 ->val('#other_type', 'Unicorn');
292 # Replace some HTML code:
293 my $html = $self->render('SomeController/the_action', { output => 0 });
294 $js->html('#id_with_new_content', $html);
296 # Operations on a jstree: rename a node and select it
297 my $text_block = SL::DB::RequirementSpecTextBlock->new(id => 4711)->load;
298 $js->jstree->rename_node('#tb-' . $text_block->id, $text_block->title)
299 ->jstree->select_node('#tb-' . $text_block->id);
301 # Close a popup opened by kivi.popup_dialog():
302 $js->dialog->close('#jqueryui_popup_dialog');
304 # Finally render the JSON response:
307 # Rendering can also be chained, e.g.
308 $js->html('#selector', $html)
314 This module enables the generation of jQuery-using JavaScript code on
315 the server side. That code is then evaluated in a safe way on the
318 The workflow is usally that the client creates an AJAX request, the
319 server creates some actions and sends them back, and the client then
320 implements each of these actions.
322 There are three things that need to be done for this to work:
326 =item 1. The "client_js.js" has to be loaded before the AJAX request is started.
328 =item 2. The client code needs to call C<kivi.eval_json_result()> with the result returned from the server.
330 =item 3. The server must use this module.
334 The functions called on the client side are mostly jQuery
335 functions. Other functionality may be added later.
337 Note that L<SL::Controller/render> is aware of this module which saves
338 you some boilerplate. The following two calls are equivalent:
340 $controller->render($client_js);
341 $controller->render(\$client_js->to_json, { type => 'json' });
343 =head1 FUNCTIONS NOT PASSED TO THE CLIENT SIDE
349 Returns the actions gathered so far as an array reference. Each
350 element is an array reference containing at least two items: the
351 function's name and what it is called on. Additional array elements
352 are the function parameters.
356 Returns the actions gathered so far as a JSON string ready to be sent
359 =item C<render [$controller]>
361 Renders C<$self> via the controller. Useful for chaining. Equivalent
364 $controller->render(\$self->to_json, { type => 'json' });
366 The controller instance to use can be set during object creation (see
367 synopsis) or as an argument to C<render>.
371 Tells C<$self> that the next action is to be called on a jQuery UI
372 dialog instance, e.g. one opened by C<kivi.popup_dialog()>. For
375 $js->dialog->close('#jqueryui_popup_dialog');
379 Tells C<$self> that the next action is to be called on a jstree
380 instance. For example:
382 $js->jstree->rename_node('tb-' . $text_block->id, $text_block->title);
386 =head1 FUNCTIONS EVALUATED ON THE CLIENT SIDE
388 =head2 GENERIC FUNCTION
390 All of the following functions can be invoked in two ways: either by
391 calling the function name directly on C<$self> or by calling
392 L</action> with the function name as the first parameter. Therefore
393 the following two calls are identical:
395 $js->insertAfter($html, '#some-id');
396 $js->action('insertAfter', $html, '#some-id');
398 The second form, calling L</action>, is more to type but can be useful
399 in situations in which you have to call one of two functions depending
400 on context. For example, when you want to insert new code in a
401 list. If the list is empty you might have to use C<appendTo>, if it
402 isn't you might have to use C<insertAfter>. Example:
404 my $html = $self->render(...);
405 $js->action($list_is_empty ? 'appendTo' : 'insertAfter', $html, '#text-block-' . ($list_is_empty ? 'list' : $self->text_block->id));
409 my $html = $self->render(...);
410 if ($list_is_empty) {
411 $js->appendTo($html, '#text-block-list');
413 $js->insertAfter($html, '#text-block-' . $self->text_block->id);
416 The first variation is obviously better suited for chaining.
420 =item C<action $method, @args>
422 Call the function with the name C<$method> on C<$self> with arguments
423 C<@args>. Returns the return value of the actual function
424 called. Useful for chaining (see above).
426 =item C<action_if $condition, $method, @args>
428 Call the function with the name C<$method> on C<$self> with arguments
429 C<@args> if C<$condition> is trueish. Does nothing otherwise.
431 Returns the return value of the actual function called if
432 C<$condition> is trueish and C<$self> otherwise. Useful for chaining
435 This function is equivalent to the following:
438 $obj->$method(@args);
441 But it is easier to integrate into a method call chain, e.g.:
443 $js->html('#content', $html)
444 ->action_if($item->is_flagged, 'toggleClass', '#marker', 'flagged')
449 =head2 ADDITIONAL FUNCTIONS
453 =item C<flash $type, $message>
455 Display a C<$message> in the flash of type C<$type>. Multiple calls of
456 C<flash> on the same C<$self> will be merged by type.
458 On the client side the flashes of all types will be cleared after each
459 successful ClientJS call that did not end with C<$js-E<gt>error(...)>.
461 =item C<error $message>
463 Causes L<to_json> (and therefore L<render>) to output a JSON object
464 that only contains an C<error> field set to this C<$message>. The
465 client will then show the message in the 'error' flash.
467 The messages of multiple calls of C<error> on the same C<$self> will
470 =item C<redirect_to $url>
472 Redirects the browser window to the new URL by setting the JavaScript
473 property C<window.location.href>. Note that
474 L<SL::Controller::Base/redirect_to> is AJAX aware and uses this
475 function if the current request is an AJAX request as determined by
476 L<SL::Request/is_ajax>.
480 =head2 KIVITENDO FUNCTIONS
482 The following functions from the C<kivi> namespace are supported:
486 =item Displaying stuff
488 C<flash> (don't call directly, use L</flash> instead)
490 =item Running functions
492 C<run>, C<run_once_for>
500 =head2 JQUERY FUNCTIONS
502 The following jQuery functions are supported:
508 C<hide>, C<show>, C<toggle>
510 =item DOM insertion, around
512 C<unwrap>, C<wrap>, C<wrapAll>, C<wrapInner>
514 =item DOM insertion, inside
516 C<append>, C<appendTo>, C<html>, C<prepend>, C<prependTo>, C<text>
518 =item DOM insertion, outside
520 C<after>, C<before>, C<insertAfter>, C<insertBefore>
526 =item DOM replacement
528 C<replaceAll>, C<replaceWith>
530 =item General attributes
532 C<attr>, C<prop>, C<removeAttr>, C<removeProp>, C<val>
534 =item Class attributes
536 C<addClass>, C<removeClass>, C<toggleClass>
540 C<data>, C<removeData>
546 =item Generic Event Handlers
548 C<on>, C<off>, C<one>
550 These attach/detach event listeners to specific selectors. The first
551 argument is the selector, the second the name of the events and the
552 third argument is the name of the handler function. That function must
553 already exist when the handler is added.
557 =head2 JQUERY POPUP DIALOG PLUGIN
559 Supported functions of the C<popup dialog> plugin to jQuery. They are
560 invoked by first calling C<dialog> in the ClientJS instance and then
563 $js->dialog->close(...);
567 =item Closing and removing the popup
573 =head2 AJAXFORM JQUERY PLUGIN
575 The following functions of the C<ajaxForm> plugin to jQuery are
580 =item All functions by the generic accessor function:
586 =head2 JSTREE JQUERY PLUGIN
588 Supported functions of the C<jstree> plugin to jQuery. They are
589 invoked by first calling C<jstree> in the ClientJS instance and then
592 $js->jstree->open_node(...);
596 =item Operations on the whole tree
600 =item Opening and closing nodes
602 C<open_node>, C<close_node>, C<toggle_node>, C<open_all>,
603 C<close_all>, C<save_opened>, C<reopen>
605 =item Modifying nodes
607 C<rename_node>, C<delete_node>, C<move_node>
609 =item Selecting nodes (from the 'ui' jstree plugin)
611 C<select_node>, C<deselect_node>, C<deselect_all>
615 =head1 ADDING SUPPORT FOR ADDITIONAL FUNCTIONS
617 In order not having to maintain two files (this one and
618 C<js/client_js.js>) there's a script that can parse this file's
619 C<%supported_methods> definition and generate the file
620 C<js/client_js.js> accordingly. The steps are:
624 =item 1. Add lines in this file to the C<%supported_methods> hash. The
625 key is the function name and the value is the number of expected
626 parameters. The value can be negative to indicate that the function
627 takes at least the absolute of this value as parameters and optionally
628 more. In such a case the C<E<lt>ARGSE<gt>> format expands to an actual
629 array (and the individual elements if the value is positive>.
631 =item 2. Run C<scripts/generate_client_js_actions.pl>. It will
632 generate C<js/client_js.js> automatically.
634 =item 3. Reload the files in your browser (cleaning its cache can also
639 The template file used for generated C<js/client_js.js> is
640 C<scripts/generate_client_js_actions.tpl>.
648 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>