Module: Middleman::CoreExtensions::Rendering::InstanceMethods
- Defined in:
- lib/middleman-core/core_extensions/rendering.rb
Overview
Rendering instance methods
Instance Method Summary collapse
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#current_engine ⇒ Symbol?
The currently rendering engine.
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#current_engine=(v) ⇒ Symbol?
The currently rendering engine rubocop:disable TrivialAccessors.
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#fetch_layout(engine, opts) ⇒ String
Find a layout for a given engine.
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#locate_layout(name, preferred_engine = nil) ⇒ String
Find a layout on-disk, optionally using a specific engine.
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#locate_partial(partial_name, try_static = true) ⇒ String
Partial locator.
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#options_for_ext(ext) ⇒ Hash
Get a hash of configuration options for a given file extension, from config.rb.
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#render(_, data, options = {}, &block) ⇒ String
Sinatra/Padrino compatible render method signature referenced by some view helpers.
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#render_individual_file(path, locs = {}, opts = {}, context = self, &block) ⇒ String
Render an on-disk file.
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#render_template(path, locs = {}, opts = {}, blocks = []) ⇒ String
Render a template, with layout, given a path.
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#resolve_template(request_path, options = {}) ⇒ Array<String, Symbol>, Boolean
Find a template on disk given a output path.
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#template_data_for_file(path) ⇒ String
Get the template data from a path.
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#template_extensions(extension_map = nil) ⇒ Hash
Add or overwrite a default template extension.
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#wrap_layout(layout_name, &block)
Allow layouts to be wrapped in the contents of other layouts.
Instance Method Details
#current_engine ⇒ Symbol?
The currently rendering engine
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# File 'lib/middleman-core/core_extensions/rendering.rb', line 445 def current_engine @_current_engine ||= nil end |
#current_engine=(v) ⇒ Symbol?
The currently rendering engine rubocop:disable TrivialAccessors
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# File 'lib/middleman-core/core_extensions/rendering.rb', line 452 def current_engine=(v) @_current_engine = v end |
#fetch_layout(engine, opts) ⇒ String
Find a layout for a given engine
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# File 'lib/middleman-core/core_extensions/rendering.rb', line 360 def fetch_layout(engine, opts) # The layout name comes from either the system default or the options local_layout = opts.key?(:layout) ? opts[:layout] : config[:layout] return false unless local_layout # Look for engine-specific options = respond_to?(engine) ? send(engine) : {} # The engine for the layout can be set in options, engine_options or passed # into this method layout_engine = if opts.key?(:layout_engine) opts[:layout_engine] elsif .key?(:layout_engine) [:layout_engine] else engine end # Automatic mode if local_layout == :_auto_layout # Look for :layout of any extension # If found, use it. If not, continue locate_layout(:layout, layout_engine) || false else # Look for specific layout # If found, use it. If not, error. if layout_path = locate_layout(local_layout, layout_engine) layout_path else raise ::Middleman::CoreExtensions::Rendering::TemplateNotFound, "Could not locate layout: #{local_layout}" end end end |
#locate_layout(name, preferred_engine = nil) ⇒ String
Find a layout on-disk, optionally using a specific engine
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# File 'lib/middleman-core/core_extensions/rendering.rb', line 398 def locate_layout(name, preferred_engine=nil) resolve_opts = {} resolve_opts[:preferred_engine] = preferred_engine unless preferred_engine.nil? # Check layouts folder layout_path = resolve_template(File.join(config[:layouts_dir], name.to_s), resolve_opts) # If we didn't find it, check root layout_path = resolve_template(name, resolve_opts) unless layout_path # Return the path layout_path end |
#locate_partial(partial_name, try_static = true) ⇒ String
Partial locator.
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# File 'lib/middleman-core/core_extensions/rendering.rb', line 228 def locate_partial(partial_name, try_static=true) resolve_opts = { try_without_underscore: true, try_static: try_static } # If the path is known to the sitemap if resource = sitemap.find_resource_by_path(current_path) current_dir = File.dirname(resource.source_file) resolve_opts[:preferred_engine] = File.extname(resource.source_file)[1..-1].to_sym # Look for partials relative to the current path relative_dir = File.join(current_dir.sub(%r{^#{Regexp.escape(source_dir)}/?}, ''), partial_name) resolve_template(relative_dir, resolve_opts) || resolve_template(partial_name, resolve_opts) else resolve_template(partial_name, resolve_opts) end end |
#options_for_ext(ext) ⇒ Hash
Get a hash of configuration options for a given file extension, from config.rb
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# File 'lib/middleman-core/core_extensions/rendering.rb', line 337 def (ext) # Read options for extension from config/Tilt or cache cache.fetch(:options_for_ext, ext) do = {} # Find all the engines which handle this extension in tilt. Look for # config variables of that name and merge it extension_class = ::Tilt[ext] ::Tilt.mappings.each do |mapping_ext, engines| next unless engines.include? extension_class = config[mapping_ext.to_sym] || {} .merge!() end end end |
#render(_, data, options = {}, &block) ⇒ String
Sinatra/Padrino compatible render method signature referenced by some view helpers. Especially partials.
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# File 'lib/middleman-core/core_extensions/rendering.rb', line 202 def render(_, data, ={}, &block) partial_name = data.to_s found_partial = locate_partial(partial_name, false) || locate_partial(partial_name, true) # Look in the partials_dir for the partial with the current engine unless found_partial partials_path = File.join(config[:partials_dir], partial_name) found_partial = locate_partial(partials_path, false) || locate_partial(partials_path, true) end raise ::Middleman::CoreExtensions::Rendering::TemplateNotFound, "Could not locate partial: #{data}" unless found_partial locals = [:locals] if ::Tilt[found_partial] # Render the partial if found, otherwide throw exception _render_with_all_renderers(found_partial, locals, self, , &block) else File.read(found_partial) end end |
#render_individual_file(path, locs = {}, opts = {}, context = self, &block) ⇒ String
Render an on-disk file. Used for everything, including layouts.
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# File 'lib/middleman-core/core_extensions/rendering.rb', line 252 def render_individual_file(path, locs={}, opts={}, context=self, &block) path = path.to_s # Mutability is FUN! # Try to work around: https://github.com/middleman/middleman/issues/501 locs = locs.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 @_out_buf, _buf_was = '', @_out_buf # Read from disk or cache the contents of the file body = if opts[:template_body] opts.delete(:template_body) else template_data_for_file(path) end # Merge per-extension options from config extension = File.extname(path) = opts.dup.merge((extension)) [:outvar] ||= '@_out_buf' .delete(:layout) # Overwrite with frontmatter options = .deep_merge([:renderer_options]) if [:renderer_options] template_class = ::Tilt[path] # Allow hooks to manipulate the template before render self.class.callbacks_for_hook(:before_render).each do |callback| # Uber::Options::Value doesn't respond to call newbody = if callback.respond_to?(:call) callback.call(body, path, locs, template_class) elsif callback.respond_to?(:evaluate) callback.evaluate(self, body, path, locs, template_class) end body = newbody if newbody # Allow the callback to return nil to skip it end # Read compiled template from disk or cache template = cache.fetch(:compiled_template, extension, , body) do ::Tilt.new(path, 1, ) { body } end # Render using Tilt content = template.render(context, locs, &block) # Allow hooks to manipulate the result after render self.class.callbacks_for_hook(:after_render).each do |callback| # Uber::Options::Value doesn't respond to call newcontent = if callback.respond_to?(:call) content = callback.call(content, path, locs, template_class) elsif callback.respond_to?(:evaluate) content = callback.evaluate(self, content, path, locs, template_class) end content = newcontent if newcontent # Allow the callback to return nil to skip it end output = ::ActiveSupport::SafeBuffer.new '' output.safe_concat content output ensure # Reset stored buffer @_out_buf = _buf_was context.current_engine = engine_was end |
#render_template(path, locs = {}, opts = {}, blocks = []) ⇒ String
Render a template, with layout, given a path
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# File 'lib/middleman-core/core_extensions/rendering.rb', line 129 def render_template(path, locs={}, opts={}, blocks=[]) extension = File.extname(path) engine = extension[1..-1].to_sym if defined?(::I18n) old_locale = ::I18n.locale ::I18n.locale = opts[:lang] if opts[:lang] end # Use a dup of self as a context so that instance variables set within # the template don't persist for other templates. context = dup blocks.each do |block| context.instance_eval(&block) end # Store current locs/opts for later @current_locs = locs @current_opts = opts content = _render_with_all_renderers(path, locs, context, opts) # If we need a layout and have a layout, use it if layout_path = fetch_layout(engine, opts) content = render_individual_file(layout_path, locs, opts, context) { content } end # Return result content ensure # Pop all the saved variables from earlier as we may be returning to a # previous render (layouts, partials, nested layouts). ::I18n.locale = old_locale if defined?(::I18n) @content_blocks = nil @current_locs = nil @current_opts = nil end |
#resolve_template(request_path, options = {}) ⇒ Array<String, Symbol>, Boolean
Find a template on disk given a output path
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# File 'lib/middleman-core/core_extensions/rendering.rb', line 462 def resolve_template(request_path, ={}) # Find the path by searching or using the cache request_path = request_path.to_s cache.fetch(:resolve_template, request_path, ) do relative_path = Util.strip_leading_slash(request_path) on_disk_path = File.(relative_path, source_dir) preferred_engines = if [:try_static] [nil] else possible_engines = ['*'] # By default, any engine will do # If we're specifically looking for a preferred engine if .key?(:preferred_engine) extension_class = ::Tilt[[:preferred_engine]] # Get a list of extensions for a preferred engine matched_exts = ::Tilt.mappings.select do |_, engines| engines.include? extension_class end.keys # Prefer to look for the matched extensions unless matched_exts.empty? possible_engines.unshift('{' + matched_exts.join(',') + '}') end end possible_engines end search_paths = preferred_engines.flat_map do |preferred_engine| path_with_ext = on_disk_path.dup path_with_ext << ('.' + preferred_engine) unless preferred_engine.nil? paths = [path_with_ext] if [:try_without_underscore] paths << path_with_ext.sub(relative_path, relative_path.sub(/^_/, '').sub(/\/_/, '/')) end paths end found_path = nil search_paths.each do |path_with_ext| found_path = Dir[path_with_ext].find do |path| ::Tilt[path] end unless found_path found_path = path_with_ext if File.exist?(path_with_ext) end break if found_path end # If we found one, return it if found_path found_path elsif File.exist?(on_disk_path) on_disk_path else false end end end |
#template_data_for_file(path) ⇒ String
Get the template data from a path
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# File 'lib/middleman-core/core_extensions/rendering.rb', line 328 def template_data_for_file(path) File.read(File.(path, source_dir)) end |
#template_extensions(extension_map = nil) ⇒ Hash
Add or overwrite a default template extension
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# File 'lib/middleman-core/core_extensions/rendering.rb', line 117 def template_extensions(extension_map=nil) @_template_extensions ||= {} @_template_extensions.merge!(extension_map) if extension_map @_template_extensions end |
#wrap_layout(layout_name, &block)
This method returns an undefined value.
Allow layouts to be wrapped in the contents of other layouts
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# File 'lib/middleman-core/core_extensions/rendering.rb', line 415 def wrap_layout(layout_name, &block) # Save current buffer for later @_out_buf, _buf_was = '', @_out_buf layout_path = locate_layout(layout_name, current_engine) extension = File.extname(layout_path) engine = extension[1..-1].to_sym # Store last engine for later (could be inside nested renders) self.current_engine, engine_was = engine, current_engine begin content = if block_given? capture_html(&block) else '' end ensure # Reset stored buffer @_out_buf = _buf_was end concat_safe_content render_individual_file(layout_path, @current_locs || {}, @current_opts || {}, self) { content } ensure self.current_engine = engine_was end |