Support Parameterised Layouts

[joeldrapper]

With this change, you will be able to use parameterised layouts, e.g.

layout -> { ApplicationLayout.new(theme: :blue, show_header: false) }

For more details on why you might want to do this, see https://jardo.dev/adding-parameterized-layouts-to-phlex-rails

Todo

• Because of the way I’ve implemented this, the current tests already exercise this code, however, it would be good to add a test that uses parameterised layouts

[joeldrapper]

If @_context is set, we're already rendering and this should not be treated as an external call to render the layout. It should do the normal render behaviour instead.

[joeldrapper]

We should probably define a method for this, e.g.

def rendering?
  !!@_context
end

[joeldrapper]

This should return nil after pushing with unsafe_raw.

[Burgestrand]

Hi!

I like this change. I needed something like this in the past.

However, it appears to have broken this kind of code:

class ApplicationLayout < Phlex::HTML
  include Phlex::Rails::Layout

  def view_template
    html do
      body do
        render partial: "tracking" # boom
      end
    end
  end
end

It raises:

     ArgumentError:
       wrong number of arguments (given 0, expected 1+)
     # /Users/kim/.asdf/installs/ruby/3.2.2/lib/ruby/gems/3.2.0/gems/phlex-rails-1.2.1/lib/phlex/rails/layout.rb:48:in `render'