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Daniel N

2006-Nov-30 14:09 UTC

[ANN] resouce_on_demand plugin

Hi all,

This plugin helps to include javascript and stylesheets only when you need
to.

Currently if you want the :defaults javascripts to be included, you include
them in the layout and they are called in in all pages that use that layout,
even if it''s essentially a javascript static page.

With this you can specify that a layout, or a deeply nested partial requires
a particular javascript file, or stylesheet.  This will be then included in
the head tag of the layout without duplicates.  eg you can have a partial
iterating over a collection that calls a particular js file every iteration,
but only one javascript_include_tag call will be made for that file.

From the README

 = resource_on_demand

Allows inclusion of external javascript and stylesheets in the head tag,
from anywhere in a view, including nested partials

Usage
-------

Within the head tag of the layout

<%= include_on_demand %>

Then from anywhere in you views or partials

<% demand_javascript "my", "javascript",
"files", :defaults %>

*note do not use <%= use <%

This will add specified javascripts and to the head tag without duplicates.
The arguments are the same as
used in javascript_include_tag

<% demand_stylesheets %> is similar, but the arguments are the same as
used
in
stylesheet_link_tag
------------------

This is my first plugin so any kind of feedback is welcome :)

You can download it at

http://svn.devjavu.com/liquid/resource_on_demand

Cheers
Daniel


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Michael Houghton

2006-Nov-30 14:52 UTC

head link

Re: resouce_on_demand plugin

Daniel,

Looks cool.

I do the same sort of thing fairly extensively with these two helper
methods, which are a bit different:

  # a way of identifying features the layout needs to load
  def require_page_support(*scr)
    @page_scripts ||= {}
    scr.each { |s| @page_scripts[s] = true }
  end

  # used in the layout to query the need for features
  def load_page_support?(*scr)
    @page_scripts ||= {}
    scr.inject(false) {|matches, s| matches || @page_scripts[s] }
  end

Then, in my layout, I have things like this, for example for lightbox:

<% if load_page_support? :lightbox -%>
  <%= javascript_include_tag "lightbox" %>
  <%= stylesheet_link_tag ''lightbox'' %>
<% end -%>

The lightbox link helper then just does something like:

  # lightbox support
  def link_to_lightbox(content, action, opts={})
    require_page_support :lightbox
    opts.merge!(:class => ''lbOn'')
    link_to(content, action, opts)
  end

If any of this is any use, feel free to pinch it.

Daniel N wrote:> Hi all,
>
> This plugin helps to include javascript and stylesheets only when you need
> to.
>
> Currently if you want the :defaults javascripts to be included, you include
> them in the layout and they are called in in all pages that use that
layout,
> even if it''s essentially a javascript static page.
>
> With this you can specify that a layout, or a deeply nested partial
requires
> a particular javascript file, or stylesheet.  This will be then included in
> the head tag of the layout without duplicates.  eg you can have a partial
> iterating over a collection that calls a particular js file every
iteration,
> but only one javascript_include_tag call will be made for that file.
>
> From the README
>
>  = resource_on_demand
>
> Allows inclusion of external javascript and stylesheets in the head tag,
> from anywhere in a view, including nested partials
>
> Usage
> -------
>
> Within the head tag of the layout
>
> <%= include_on_demand %>
>
> Then from anywhere in you views or partials
>
> <% demand_javascript "my", "javascript",
"files", :defaults %>
>
> *note do not use <%= use <%
>
> This will add specified javascripts and to the head tag without duplicates.
> The arguments are the same as
> used in javascript_include_tag
>
> <% demand_stylesheets %> is similar, but the arguments are the same
as used
> in
> stylesheet_link_tag
> ------------------
>
> This is my first plugin so any kind of feedback is welcome :)
>
> You can download it at
>
> http://svn.devjavu.com/liquid/resource_on_demand
>
> Cheers
> Daniel
>
> ------=_Part_45814_26011008.1164895781913
> Content-Type: text/html; charset=ISO-8859-1
> X-Google-AttachSize: 1736
>
> Hi all,<br><br>This plugin helps to include javascript and
stylesheets only when you need to.&nbsp; <br><br>Currently if
you want the :defaults javascripts to be included, you include them in the
layout and they are called in in all pages that use that layout, even if
it''s essentially a javascript static page.
> <br><br>With this you can specify that a layout, or a deeply
nested partial requires a particular javascript file, or stylesheet.&nbsp;
This will be then included in the head tag of the layout without
duplicates.&nbsp; eg you can have a partial iterating over a collection that
calls a particular js file every iteration, but only one javascript_include_tag
call will be made for that file.
> <br><br>From the README<br><br>&nbsp;=
resource_on_demand<br><br>Allows inclusion of external javascript
and stylesheets in the head tag, from anywhere in a view, including nested
partials<br><br>Usage<br>-------<br><br>Within the
head tag of the layout
> <br><br>&lt;%= include_on_demand
%&gt;<br><br>Then from anywhere in you views or
partials<br><br>&lt;% demand_javascript &quot;my&quot;,
&quot;javascript&quot;, &quot;files&quot;, :defaults
%&gt;<br><br>*note do not use &lt;%= use &lt;%
> <br><br>This will add specified javascripts and to the head tag
without duplicates.&nbsp; The arguments are the same as<br>used in
javascript_include_tag<br><br>&lt;% demand_stylesheets %&gt;
is similar, but the arguments are the same as used in
>
<br>stylesheet_link_tag<br>------------------<br><br>This
is my first plugin so any kind of feedback is welcome :)<br><br>You
can download it at <br><br><a
href="http://svn.devjavu.com/liquid/resource_on_demand">http://svn.devjavu.com/liquid/resource_on_demand
> </a><br><br>Cheers<br>Daniel<br>
> 
> ------=_Part_45814_26011008.1164895781913--

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Daniel N

2006-Nov-30 22:19 UTC

head link

Re: resouce_on_demand plugin

On 12/1/06, Michael Houghton
<michael.houghton-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
>
> Daniel,
>
> Looks cool.
>
> I do the same sort of thing fairly extensively with these two helper
> methods, which are a bit different:
>
>   # a way of identifying features the layout needs to load
>   def require_page_support(*scr)
>     @page_scripts ||= {}
>     scr.each { |s| @page_scripts[s] = true }
>   end
>
>   # used in the layout to query the need for features
>   def load_page_support?(*scr)
>     @page_scripts ||= {}
>     scr.inject(false) {|matches, s| matches || @page_scripts[s] }
>   end
>
> Then, in my layout, I have things like this, for example for lightbox:
>
> <% if load_page_support? :lightbox -%>
>   <%= javascript_include_tag "lightbox" %>
>   <%= stylesheet_link_tag ''lightbox'' %>
> <% end -%>
>
> The lightbox link helper then just does something like:
>
>   # lightbox support
>   def link_to_lightbox(content, action, opts={})
>     require_page_support :lightbox
>     opts.merge!(:class => ''lbOn'')
>     link_to(content, action, opts)
>   end
>
> If any of this is any use, feel free to pinch it.

Thanx for the input.  Now that I''ve had a sleep on it I''m not
sure that I''m
cool with the method names that I used.  I think I may change these to
require_javascript instead of demand_javascript.

I''ll have a good look at how your helper methods work when I get home.

Cheers


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Rails - Nov 2006 - resouce_on_demand plugin

[ANN] resouce_on_demand plugin

Re: resouce_on_demand plugin

Re: resouce_on_demand plugin