Class: Middleman::FileRenderer

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Includes:
Contracts
Defined in:
lib/middleman-core/file_renderer.rb

Constant Summary

Constants included from Contracts

Contracts::PATH_MATCHER

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Contracts

#Contract

Constructor Details

#initialize(app, path) ⇒ FileRenderer

Returns a new instance of FileRenderer.



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# File 'lib/middleman-core/file_renderer.rb', line 20

def initialize(app, path)
  @app = app
  @path = path.to_s
end

Class Method Details

.cache ⇒ Object 



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# File 'lib/middleman-core/file_renderer.rb', line 14

def self.cache
  @_cache ||= ::Tilt::Cache.new
end

Instance Method Details

#Hash ⇒ String

Render an on-disk file. Used for everything, including layouts.

Parameters:

  • locs (Hash)
  • opts (Hash)
  • context (Class)

Returns:



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# File 'lib/middleman-core/file_renderer.rb', line 31

Contract Hash, Hash, Any, Maybe[Proc] => String

#render(locs, opts, context, &block) ⇒ Object 



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# File 'lib/middleman-core/file_renderer.rb', line 32

def render(locs, opts, context, &block)
  path = @path.dup

  # Detect the remdering engine from the extension
  extension = File.extname(path)
  engine = extension[1..-1].to_sym

  # Store last engine for later (could be inside nested renders)
  context.current_engine, engine_was = engine, context.current_engine

  # Save current buffer for later
  buf_was = context.save_buffer

  # Read from disk or cache the contents of the file
  body = if opts[:template_body]
    opts.delete(:template_body)
  else
    template_data_for_file
  end

  # Merge per-extension options from config
  extension = File.extname(path)
  options = {}.merge!(opts).merge!(options_for_ext(extension))
  options[:outvar] ||= '@_out_buf'
  options[:context] = context
  options.delete(:layout)

  # Overwrite with frontmatter options
  options = options.deep_merge(options[:renderer_options]) if options[:renderer_options]

  template_class = ::Tilt[path]

  # Allow hooks to manipulate the template before render
  body = @app.callbacks_for(:before_render).reduce(body) do |sum, callback|
    callback.call(sum, path, locs, template_class) || sum
  end

  # Read compiled template from disk or cache
  template = ::Tilt.new(path, 1, options) { body }
  # template = cache.fetch(:compiled_template, extension, options, body) do
  #   ::Tilt.new(path, 1, options) { body }
  # end

  # Render using Tilt
  # content = ::Middleman::Util.instrument 'render.tilt', path: path do
  #   template.render(context, locs, &block)
  # end
  content = template.render(context, locs, &block)

  # Allow hooks to manipulate the result after render
  content = @app.callbacks_for(:after_render).reduce(content) do |sum, callback|
    callback.call(sum, path, locs, template_class) || sum
  end

  output = ::ActiveSupport::SafeBuffer.new ''
  output.safe_concat content
  output
ensure
  # Reset stored buffer
  context.restore_buffer(buf_was)
  context.current_engine = engine_was
end

#String ⇒ String

Get the template data from a path

Parameters:

Returns:



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# File 'lib/middleman-core/file_renderer.rb', line 98

Contract String

#template_data_for_file ⇒ Object 



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# File 'lib/middleman-core/file_renderer.rb', line 99

def template_data_for_file
  file = @app.files.find(:source, @path)

  if @app.extensions[:front_matter] || (file && !file[:types].include?(:no_frontmatter))
    result = @app.extensions[:front_matter].template_data_for_file(@path)
    return result unless result.nil?
  end

  file ? file.read : File.read(@path)
end