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CSS-Inliner-3671
River stage one • 1 direct dependent • 1 total dependent
/ CSS::Inliner

NAME

CSS::Inliner - Library for converting CSS <style> blocks to inline styles.

SYNOPSIS

use Inliner;

my $inliner = new Inliner();

$inliner->read_file({filename => 'myfile.html'});

print $inliner->inlinify();

DESCRIPTION

Library for converting CSS style blocks into inline styles in an HTML document. Specifically this is intended for the ease of generating HTML emails. This is useful as even in 2009 Gmail and Hotmail don't support top level <style> declarations.

CONSTRUCTOR

new ([ OPTIONS ])

Instantiates the Inliner object. Sets up class variables that are used during file parsing/processing. Possible options are:

html_tree (optional). Pass in a custom instance of HTML::Treebuilder

strip_attrs (optional). Remove all "id" and "class" attributes during inlining

leave_style (optional). Leave style/link tags alone within <head> during inlining

post_fetch_filter (optional). Execute a coderef filter on fetched content. Useful for protecting mailmerge tags while fetching. You are responsible for restoring any tags in your own code

METHODS

fetch_file( params )

Fetches a remote HTML file that supposedly contains both HTML and a style declaration, properly tags the data with the proper characterset as provided by the remote webserver (if any). Subsequently calls the read() method automatically.

This method expands all relative urls, as well as fully expands the stylesheet reference within the document.

This method requires you to pass in a params hash that contains a url argument for the requested document. For example:

$self->fetch_file({ url => 'http://www.example.com' });

read_file( params )

Opens and reads an HTML file that supposedly contains both HTML and a style declaration. It subsequently calls the read() method automatically.

This method requires you to pass in a params hash that contains a filename argument. For example:

$self->read_file({filename => 'myfile.html'});

Additionally you can specify the character encoding within the file, for example:

$self->read_file({filename => 'myfile.html', charset => 'utf8'});

read( params )

Reads passed html data and parses it. The intermediate data is stored in class variables.

The <style> block is ripped out of the html here, and stored separately. Class/ID/Names used in the markup are left alone.

This method requires you to pass in a params hash that contains scalar html data. For example:

$self->read({html => $html});

NOTE: You are required to pass a properly encoded perl reference to the html data. This method does *not* do the dirty work of encoding the html as utf8 - do that before calling this method.

inlinify()

Processes the html data that was entered through either 'read' or 'read_file', returns a scalar that contains a composite chunk of html that has inline styles instead of a top level <style> declaration.

query()

Given a particular selector return back the applicable styles

specificity()

Given a particular selector return back the associated selectivity

content_warnings()

Return back any warnings thrown while inlining a given block of content.

Note: content warnings are initialized at inlining time, not at read time. In order to receive back content feedback you must perform inlinify() first

Sponsor

This code has been developed under sponsorship of MailerMailer LLC, http://www.mailermailer.com/

AUTHOR

Kevin Kamel <kamelkev@mailermailer.com>

CONTRIBUTORS

Vivek Khera <vivek@khera.org> Michael Peters <wonko@cpan.org>

LICENSE

This module is Copyright 2011 Khera Communications, Inc. It is licensed under the same terms as Perl itself.