Linux Certif

Toute la documentation sur la certification Linux LPI

Catalyst::Plugin::Images.3pm

NAME

Catalyst::Plugin::Images - Generate image tags for static files.

SYNOPSIS

         use Catalyst qw/
         Images
     /;
 
 

     # ... somewhere in your templates
 
 

     [% c.image_tag("foo.png" => "alt text") %];
 
 

DESCRIPTION

This plugin aims to assist you in generating image tags that contain alt text, a properly escaped src attribute, height and width info, without worrying too much.

METHODS

image_tag $basename, %attrs

This method generates an image tag for the image named $basename, with the extra tags %attr.

get_image_info $basename

Retrieve the information about the image either from the cache or by searching for it.

find_image_file $basename

Look inside all the search paths (see ``CONFIGURATION'') for an image named $basename, and return the full path to it, as a <Path::Class::File> object..

read_image_info $path

Given the full path, as a Path::Class::File object, return the attributes to be added to the image. This returns a list with "width" and "height", using "Image::Size".

image_path_to_uri $path, $basename

Generates a URI using ``uri_for'' in Catalyst, with the absolute path $path relativized to "uri_base". See </CONFIGURATION>.

get_cached_image_info

set_cached_image_info

see ``CACHING IMAGE DATA'' below.

setup

Overridden to seed configuration defaults.

CONFIGURATION

All configuration information is stored under the "images" key.

paths

This should be an array reference of Path::Class::Dir objects (easily generated with ``path_to'' in Catalyst) in which to search for images.

It defaults to "root/static", "root/images", "root/static/images" by default.

uri_base

This is the ``base'' prefix path for URI generation. For example, if an image was found at "/www/static/images/foo.png" and "uri_base" is "/www" then the URI generated with "Catalyst/uri_for" will be for "/static/images/foo.png".

CACHING IMAGE DATA

The code will call "get_cached_image_info" and "set_cached_image_info" when appropriate. Currently both these operations are no op. You should override this if you care.

"get_cached_image_info" receives the base name, and should return the info hash.

"set_cached_image_info" receives the base name, and the info hash. It can use this data to expire the cache based on mtime, etc. The info hash contains the keys "width", "height", "uri", and "path".

SEE ALSO

Catalyst, Catalyst::Plugin::Static::Simple, Image::Size