HTML::Prototype - Generate HTML and Javascript for the Prototype library
use HTML::Prototype; my $prototype = HTML::Prototype->new; print $prototype->auto_complete_field(...); print $prototype->auto_complete_result(...); print $prototype->auto_complete_stylesheet(...); print $prototype->content_tag(...); print $prototype->define_javascript_functions; print $prototype->draggable_element(...); print $prototype->drop_receiving_element(...); print $prototype->evaluate_remote_response(...); print $prototype->form_remote_tag(...); print $prototype->in_place_editor(...); print $prototype->in_place_editor_field(...); print $prototype->in_place_editor_stylesheet(...); print $prototype->javascript_tag(...); print $prototype->link_to_function(...); print $prototype->link_to_remote(...); print $prototype->observe_field(...); print $prototype->observe_form(...); print $prototype->periodically_call_remote(...); print $prototype->sortable_element(...); print $prototype->submit_to_remote(...); print $prototype->tag(...); print $prototype->text_field_with_auto_complete(...); print $prototype->update_element_function(...); print $prototype->visual_effect(...);
The module contains some code generators for Prototype, the famous JavaScript OO library and the script.aculous extensions.
The Prototype library (http://prototype.conio.net/) is designed to make AJAX easy. Catalyst::Plugin::Prototype makes it easy to connect to the Prototype library.
This is mostly a port of the Ruby on Rails helper tags for JavaScript for use in Catalyst.
Makes an HTML element specified by the DOM ID $field_id become an in-place editor of a property.
$field_id
A form is automatically created and displayed when the user clicks the element, something like this:
<form id="myElement-in-place-edit-form" target="specified url"> <input name="value" text="The content of myElement"/> <input type="submit" value="ok"/> <a onClick="javascript to cancel the editing">cancel</a> </form>
The form is serialized and sent to the server using an Ajax call, the action on the server should process the value and return the updated value in the body of the reponse. The element will automatically be updated with the changed value (as returned from the server).
Required options are:
url: Specifies the url where the updated value should be sent after the user presses "ok".
url
Addtional options are:
rows: Number of rows (more than 1 will use a TEXTAREA)
rows
cols: The number of columns the text area should span (works for both single line or multi line).
cols
size: Synonym for ‘cols’ when using single-line (rows=1) input
size
cancel_text: The text on the cancel link. (default: "cancel")
cancel_text
form_class_name: CSS class used for the in place edit form. (default: "inplaceeditor-form")
form_class_name
save_text: The text on the save link. (default: "ok")
save_text
saving_class_name: CSS class added to the element while displaying "Saving..." (removed when server responds). (default: "inplaceeditor-saving")
saving_class_name
load_text_url: Will cause the text to be loaded from the server (useful if your text is actually textile and formatted on the server)
load_text_url
loading_text: If the load_text_url option is specified then this text is displayed while the text is being loaded from the server. (default: "Loading...")
loading_text
click_to_edit_text: The text on the click-to-edit link. (default: "click to edit")
click_to_edit_text
external_control: The id of an external control used to enter edit mode.
external_control
ajax_options: Pass through options to the AJAX call (see prototype's Ajax.Updater)
ajax_options
with: JavaScript snippet that should return what is to be sent in the Ajax call, form and value are implicit parameters
with
form
value
Renders the value of the specified object and method with in-place editing capabilities.
Returns the in_place_editor stylesheet.
Adds Ajax autocomplete functionality to the text input field with the DOM ID specified by $field_id.
This function expects that the called action returns a HTML <ul> list, or nothing if no entries should be displayed for autocompletion.
url: Specifies the URL to be used in the AJAX call.
update: Specifies the DOM ID of the element whose innerHTML should be updated with the autocomplete entries returned by the Ajax request. Defaults to field_id + '_auto_complete'.
update
with: A Javascript expression specifying the parameters for the XMLHttpRequest. This defaults to 'value', which in the evaluated context refers to the new field value.
indicator: Specifies the DOM ID of an elment which will be displayed Here's an example using Catalyst::View::Mason with an indicator against the auto_complete_result example below on the server side. Notice the 'style="display:none"' in the indicator <span>.
indicator
<% $c->prototype->define_javascript_functions %> <form action="/bar" method="post" id="baz"> <fieldset> <legend>Type search terms</legend> <label for="acomp"><span class="field">Search:</span></label> <input type="text" name="acomp" id="acomp"/> <span style="display:none" id="acomp_stat">Searching...</span><br /> </fieldset> </form> <span id="acomp_auto_complete"></span><br/> <% $c->prototype->auto_complete_field( 'acomp', { url => '/autocomplete', indicator => 'acomp_stat' } ) %>
while autocomplete is running.
tokens: A string or an array of strings containing separator tokens for tokenized incremental autocompletion. Example: <tokens = ','>> would allow multiple autocompletion entries, separated by commas.
tokens
<tokens =
min_chars: The minimum number of characters that should be in the input field before an Ajax call is made to the server.
min_chars
on_hide: A Javascript expression that is called when the autocompletion div is hidden. The expression should take two variables: element and update. Element is a DOM element for the field, update is a DOM element for the div from which the innerHTML is replaced.
on_hide
on_show: Like on_hide, only now the expression is called then the div is shown.
on_show
select: Pick the class of the element from which the value for insertion should be extracted. If this is not specified, the entire element is used
select
Returns a list, to communcate with the Autocompleter.
Here's an example for Catalyst:
sub autocomplete : Global { my ( $self, $c ) = @_; my @items = qw/foo bar baz/; $c->res->body( $c->prototype->auto_complete_result(\@items) ); }
Wrapper for text_field with added Ajax autocompletion functionality.
In your controller, you'll need to define an action called auto_complete_for_object_method to respond the AJAX calls,
Returns the auto_complete stylesheet.
Returns a block with opening tag, content, and ending tag. Useful for autogenerating tags like <a href="http://catalyst.perl.org"Catalyst Homepage</a>>. The first parameter is the tag name, i.e. 'a' or 'img'.
Returns an input tag of the "text" type tailored for accessing a specified attribute (identified by $method) on an object assigned to the template (identified by $object). Additional options on the input tag can be passed as a hash ref with $html_options.
Returns the library of JavaScript functions and objects, in a script block.
Notes for Catalyst users:
You can use script/myapp_create.pl Prototype to generate a static JavaScript file which then can be included via remote script tag.
script/myapp_create.pl Prototype
script
Makes the element with the DOM ID specified by element_id draggable.
element_id
Example:
$prototype->draggable_element( 'my_image', { revert => 'true' } );
The available options are:
Default: none. Sets whether the element should only be draggable by an embedded handle. The value is a string referencing a CSS class. The first child/grandchild/etc. element found within the element that has this CSS class will be used as the handle.
Default: false. If set to true, the element returns to its original position when the drags ends.
Default: none. If set to 'horizontal' or 'vertical' the drag will be constrained to take place only horizontally or vertically.
Javascript callback function called whenever the Draggable is moved by dragging. It should be a string whose contents is a valid JavaScript function definition. The called function gets the Draggable instance as its parameter. It might look something like this:
'function (element) { // do something with dragged element }'
See http://script.aculo.us for more documentation.
Makes the element with the DOM ID specified by element_id receive dropped draggable elements (created by draggable_element).
And make an AJAX call.
By default, the action called gets the DOM ID of the element as parameter.
Example: $prototype->drop_receiving_element( 'my_cart', { url => 'http://foo.bar/add' } );
The URL for the AJAX call.
Additional options are:
Default: none. Set accept to a string or an array of strings describing CSS classes. The Droppable will only accept Draggables that have one or more of these CSS classes.
Default: none. The droppable will only accept the Draggable if the Draggable is contained in the given elements (or element ids). Can be a single element or an array of elements. This is option is used by Sortables to control Drag-and-Drop between Sortables.
Default: none. If set to 'horizontal' or 'vertical' the droppable will only react to a Draggable if it overlaps by more than 50% in the given direction. Used by Sortables.
Additionally, the following JavaScript callback functions can be used in the option parameter:
Javascript function called whenever a Draggable is moved over the Droppable and the Droppable is affected (would accept it). The callback gets three parameters: the Draggable, the Droppable element, and the percentage of overlapping as defined by the overlap option. Used by Sortables. The function might look something like this:
'function (draggable, droppable, pcnt) { // do something }'
Returns 'eval(request.responseText)' which is the Javascript function that form_remote_tag can call in :complete to evaluate a multiple update return document using update_element_function calls.
Returns a form tag that will submit in the background using XMLHttpRequest, instead of the regular reloading POST arrangement.
Even though it is using JavaScript to serialize the form elements, the form submission will work just like a regular submission as viewed by the receiving side.
The options for specifying the target with url and defining callbacks are the same as link_to_remote.
link_to_remote
Returns a javascript block with opening tag, content and ending tag.
Returns a link that will trigger a JavaScript function using the onClick handler and return false after the fact.
Examples:
$prototype->link_to_function( "Greeting", "alert('Hello world!') ) $prototype->link_to_function( '<img src="really.png"/>', 'do_delete()', { entities => '' } )
Returns a link to a remote action defined by options url that's called in the background using XMLHttpRequest.
The result of that request can then be inserted into a DOM object whose id can be specified with options->{update}.
$prototype->link_to_remote( 'Delete', { update => 'posts', url => 'http://localhost/posts/' } ) $prototype->link_to_remote( '<img src="refresh.png"/>', { update => 'emails', url => 'http://localhost/refresh/' } )
By default, these remote requests are processed asynchronously, during which various callbacks can be triggered (e.g. for progress indicators and the like).
$prototype->link_to_remote( 'count', { url => 'http://localhost/count/', complete => 'doStuff(request)' } )
The callbacks that may be specified are:
loading: Called when the remote document is being loaded with data by the browser.
loading
loaded: Called when the browser has finished loading the remote document.
loaded
interactive: Called when the user can interact with the remote document, even though it has not finished loading.
interactive
complete: Called when the XMLHttpRequest is complete.
complete
If you do need synchronous processing (this will block the browser while the request is happening), you can specify $options->{type} = 'synchronous'.
You can customize further browser side call logic by passing in Javascript code snippets via some optional parameters. In their order of use these are:
confirm: Adds confirmation dialog.
confirm
condition: Perform remote request conditionally by this expression. Use this to describe browser-side conditions when request should not be initiated.
condition
before: Called before request is initiated.
before
after: Called immediately after request was initiated and before loading.
after
Observes the field with the DOM ID specified by $id and makes an Ajax when its contents have changed.
frequency: The frequency (in seconds) at which changes to this field will be detected.
frequency
url: url to be called when field content has changed.
update: Specifies the DOM ID of the element whose innerHTML should be updated with the XMLHttpRequest response text.
with: A JavaScript expression specifying the parameters for the XMLHttpRequest. This defaults to value, which in the evaluated context refers to the new field value.
Additionally, you may specify any of the options documented in link_to_remote.
Example TT2 template in Catalyst:
[% c.prototype.define_javascript_functions %] <h1>[% page.title %]</h1> <div id="view"></div> <textarea id="editor" rows="24" cols="80">[% page.body %]</textarea> [% url = base _ 'edit/' _ page.title %] [% c.prototype.observe_field( 'editor', { url => url, with => "'body='+value", update => 'view' } ) %]
Like observe_field, but operates on an entire form identified by the DOM ID $id.
observe_field
Options are the same as observe_field, except the default value of the with option evaluates to the serialized (request string) value of the form.
Periodically calls the specified url $options->{url} every $options->{frequency} seconds (default is 10).
Usually used to update a specified div $options->{update} with the results of the remote call.
The options for specifying the target with url and defining callbacks is the same as link_to_remote.
Makes the element with the DOM ID specified by $element_id sortable by drag-and-drop and make an Ajax call whenever the sort order has changed. By default, the action called gets the serialized sortable element as parameters.
$element_id
Example: $prototype->sortable_element( 'my_list', { url => 'http://foo.bar/baz' } );
In the example, the action gets a "my_list" array parameter containing the values of the ids of elements the sortable consists of, in the current order.
You can change the behaviour with various options, see http://script.aculo.us for more documentation.
Returns a button input tag that will submit a form using XMLHttpRequest in the background instead of a typical reloading via POST.
options argument is the same as in form_remote_tag
options
form_remote_tag
Returns a opening tag.
Returns a Javascript function (or expression) that'll update a DOM element according to the options passed.
content: The content to use for updating. Can be left out if using block, see example.
content
action: Valid options are update (assumed by default), :empty, :remove
action
position: If the :action is :update, you can optionally specify one of the following positions: :before, :top, :bottom, :after.
position
Example: $prototype->javascript_tag( $prototype->update_element_function( 'products', { position => 'bottom', content => '<p>New product!</p>' ) );
This method can also be used in combination with remote method call where the result is evaluated afterwards to cause multiple updates on a page.
Example: # View $prototype->form_remote_tag( { url => { "http://foo.bar/buy" }, complete => $prototype->evaluate_remote_response } );
# Returning view $prototype->update_element_function( 'cart', { action => 'update', position => 'bottom', content => "<p>New Product: $product_name</p>" } ); $prototype->update_element_function( 'status', { binding => "You've bought a new product!" } );
Returns a JavaScript snippet to be used on the Ajax callbacks for starting visual effects.
$prototype->link_to_remote( 'Reload', { update => 'posts', url => 'http://foo.bar/baz', complete => $prototype->visual_effect( 'highlight', 'posts', { duration => '0.5' } ) } );
Catalyst::Plugin::Prototype, Catalyst. http://prototype.conio.net/
Sascha Kiefer, esskar@cpan.org Sebastian Riedel, sri@oook.de Marcus Ramberg, mramberg@cpan.org
esskar@cpan.org
sri@oook.de
mramberg@cpan.org
Built around Prototype by Sam Stephenson. Much code is ported from Ruby on Rails javascript helpers.
Drew Taylor, Leon Brocard, Andreas Marienborg
This library is free software. You can redistribute it and/or modify it under the same terms as perl itself.
1 POD Error
The following errors were encountered while parsing the POD:
Non-ASCII character seen before =encoding in '‘cols’'. Assuming CP1252
To install HTML::Prototype, copy and paste the appropriate command in to your terminal.
cpanm
cpanm HTML::Prototype
CPAN shell
perl -MCPAN -e shell install HTML::Prototype
For more information on module installation, please visit the detailed CPAN module installation guide.