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Adds Stylesheet and Javascript management to Radiant
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= Styles 'n Scripts Extension

The Styles 'n Scripts extension was an extension requested by John Long
as a means of separating javascripts & stylesheets from other site content
stored in pages.

In this README you'll find:
  1. Usage
  2. Why Change Things?
  3. Installation
  4. To Do

Using this extension is rather painless.  If you can use the rest of Radiant,
using these additions should feel obvious.  There are a couple of things to take
note of, however.

  * The CSS and JS tabs are where you create, edit, and delete stylesheets and
    javascripts.  But you need Administrator or Developer permissions to see
    these tabs.

  * If you want to reference or otherwise use your script or stylesheet in one
    of your pages, there are <r:stylesheet> and <r:javascript> tags.  These tags
    can be used to inject your CSS or JS code into the page or just render a
    link to the file itself. (Click the 'available tags' link when editing your
    Page to learn more about these two tags and their options).
  * If you really want to get fancy with your CSS and JS files, you can also use
    the corresponding <r:stylesheet> or <r:javascript> to reference other files
    of the same type.  So now you can create a single CSS or JS file that is
    made up of sub-files to cut down on server requests and speed up page load
    time -- viola, now Radiant offers asset packaging just like Rails! (And the
    caching mechanism is smart enough to keep track of your file's dependencies)

That's it.  Everything else is either too obvious to bother with here or
automagical and/or too top secret to disclose ;-).

As John sees it, the pages tab is for storing your main content. (Think of the
tree view as the list of available destinations for your users.  Sure, they need
stylesheets and javascripts, but those are supporting files -- much like images
-- that augment your pages).

There are a number of interesting benefits gained by this approach:

  * CSS and JS files now get designer-level permissions -- not user-level.

  * These files are now cached differently.  Rather than the 5-minute expiration
    on pages, these files can now report to the browser the true LAST-MODIFIED
    date so we don't have to serve up these files constantly.  We can put the
    user's browser caching to work.

  * This properly separates the concerns of Pages and Text Assets. (I mean, do 
    javascripts really need a layout or stylesheets a breadcrumb?).  Easier to 
    understand for the user and easier to develop for.

  * Allows extensions to better interact with pages.  For example, a search
    extension can now safely parse all the pages without search terms like:
    "background" returning all your stylesheets.

  * Declutter the pages tree view so that it only shows what your clients care
    about -- the things they'd aim their browser at (see John's point above).

  * This opens the door for validation, minification and obfuscation of scripts
    and stylesheets (I'm thinking that these features belong in their own
    extension(s) but they're *much* easier to build now that CSS and JS distinct

1.  Copy this extension into your existing Radiant project (place it at:
      [your project location]/vendor/extensions/styles_n_scripts

2.  Incorporate the database migrations into your existing database using:
      rake db:migrate:extensions

    Or, if you prefer to be more specific to this extension:
      rake radiant:extensions:styles_n_scripts:migrate

3.  Copy the needed images into Radiant's /public/images directory using:
      rake radiant:extensions:styles_n_scripts:update

4.  (Optional) Configure your stylesheet and javascript directories.  By default
    The Styles 'n Scripts serves your stylesheets and javascripts out of the
    /css and /js folders respectively.  You can change these locations via the
    custom_settings.rb file if you wish (just make sure you aren't competing
    with Radiant's /public files or your own pages.

5.  (Optional) Configure your stylesheet and javascript content (MIME) types.
    Again there are defaults but you can change them via the custom_settings.rb

Figure out what the core team needs to get this puppy baked into Radiant!

Improve caching by just clearing JS files on JS file update (and CSS on
CSS file update) instead of clearing all. It also might be nice to cache files
at save time too.  (But really, unless you have a *ton* of CSS or JS files, the
current mechanism is pretty darn slick.

Add a mechanism to eliminate (or at least reduce) the possibility of circular
references with <r:stylesheet> or <r:javascript> tags.s

Improve the file uploading: Do we need to confirm that it's a text file?  Do we
need to mess with handling different text encoding?  Do we want to allow
multiple file uploads?
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