diff options
Diffstat (limited to 'actionview/lib/action_view/template/handlers')
7 files changed, 301 insertions, 0 deletions
diff --git a/actionview/lib/action_view/template/handlers/builder.rb b/actionview/lib/action_view/template/handlers/builder.rb new file mode 100644 index 0000000000..61492ce448 --- /dev/null +++ b/actionview/lib/action_view/template/handlers/builder.rb @@ -0,0 +1,25 @@ +# frozen_string_literal: true + +module ActionView + module Template::Handlers + class Builder + class_attribute :default_format, default: :xml + + def call(template) + require_engine + "xml = ::Builder::XmlMarkup.new(:indent => 2);" \ + "self.output_buffer = xml.target!;" + + template.source + + ";xml.target!;" + end + + private + def require_engine # :doc: + @required ||= begin + require "builder" + true + end + end + end + end +end diff --git a/actionview/lib/action_view/template/handlers/erb.rb b/actionview/lib/action_view/template/handlers/erb.rb new file mode 100644 index 0000000000..c41de62e52 --- /dev/null +++ b/actionview/lib/action_view/template/handlers/erb.rb @@ -0,0 +1,77 @@ +# frozen_string_literal: true + +module ActionView + class Template + module Handlers + autoload :Erubis, "action_view/template/handlers/erb/deprecated_erubis" + + class ERB + autoload :Erubi, "action_view/template/handlers/erb/erubi" + autoload :Erubis, "action_view/template/handlers/erb/erubis" + + # Specify trim mode for the ERB compiler. Defaults to '-'. + # See ERB documentation for suitable values. + class_attribute :erb_trim_mode, default: "-" + + # Default implementation used. + class_attribute :erb_implementation, default: Erubi + + # Do not escape templates of these mime types. + class_attribute :escape_whitelist, default: ["text/plain"] + + ENCODING_TAG = Regexp.new("\\A(<%#{ENCODING_FLAG}-?%>)[ \\t]*") + + def self.call(template) + new.call(template) + end + + def supports_streaming? + true + end + + def handles_encoding? + true + end + + def call(template) + # First, convert to BINARY, so in case the encoding is + # wrong, we can still find an encoding tag + # (<%# encoding %>) inside the String using a regular + # expression + template_source = template.source.dup.force_encoding(Encoding::ASCII_8BIT) + + erb = template_source.gsub(ENCODING_TAG, "") + encoding = $2 + + erb.force_encoding valid_encoding(template.source.dup, encoding) + + # Always make sure we return a String in the default_internal + erb.encode! + + self.class.erb_implementation.new( + erb, + escape: (self.class.escape_whitelist.include? template.type), + trim: (self.class.erb_trim_mode == "-") + ).src + end + + private + + def valid_encoding(string, encoding) + # If a magic encoding comment was found, tag the + # String with this encoding. This is for a case + # where the original String was assumed to be, + # for instance, UTF-8, but a magic comment + # proved otherwise + string.force_encoding(encoding) if encoding + + # If the String is valid, return the encoding we found + return string.encoding if string.valid_encoding? + + # Otherwise, raise an exception + raise WrongEncodingError.new(string, string.encoding) + end + end + end + end +end diff --git a/actionview/lib/action_view/template/handlers/erb/deprecated_erubis.rb b/actionview/lib/action_view/template/handlers/erb/deprecated_erubis.rb new file mode 100644 index 0000000000..00c7d7cc7d --- /dev/null +++ b/actionview/lib/action_view/template/handlers/erb/deprecated_erubis.rb @@ -0,0 +1,11 @@ +# frozen_string_literal: true + +::ActiveSupport::Deprecation.warn("ActionView::Template::Handlers::Erubis is deprecated and will be removed from Rails 5.2. Switch to ActionView::Template::Handlers::ERB::Erubi instead.") + +module ActionView + class Template + module Handlers + Erubis = ERB::Erubis + end + end +end diff --git a/actionview/lib/action_view/template/handlers/erb/erubi.rb b/actionview/lib/action_view/template/handlers/erb/erubi.rb new file mode 100644 index 0000000000..db75f028ed --- /dev/null +++ b/actionview/lib/action_view/template/handlers/erb/erubi.rb @@ -0,0 +1,83 @@ +# frozen_string_literal: true + +require "erubi" + +module ActionView + class Template + module Handlers + class ERB + class Erubi < ::Erubi::Engine + # :nodoc: all + def initialize(input, properties = {}) + @newline_pending = 0 + + # Dup properties so that we don't modify argument + properties = Hash[properties] + properties[:preamble] = "@output_buffer = output_buffer || ActionView::OutputBuffer.new;" + properties[:postamble] = "@output_buffer.to_s" + properties[:bufvar] = "@output_buffer" + properties[:escapefunc] = "" + + super + end + + def evaluate(action_view_erb_handler_context) + pr = eval("proc { #{@src} }", binding, @filename || "(erubi)") + action_view_erb_handler_context.instance_eval(&pr) + end + + private + def add_text(text) + return if text.empty? + + if text == "\n" + @newline_pending += 1 + else + src << "@output_buffer.safe_append='" + src << "\n" * @newline_pending if @newline_pending > 0 + src << text.gsub(/['\\]/, '\\\\\&') + src << "'.freeze;" + + @newline_pending = 0 + end + end + + BLOCK_EXPR = /\s*((\s+|\))do|\{)(\s*\|[^|]*\|)?\s*\Z/ + + def add_expression(indicator, code) + flush_newline_if_pending(src) + + if (indicator == "==") || @escape + src << "@output_buffer.safe_expr_append=" + else + src << "@output_buffer.append=" + end + + if BLOCK_EXPR.match?(code) + src << " " << code + else + src << "(" << code << ");" + end + end + + def add_code(code) + flush_newline_if_pending(src) + super + end + + def add_postamble(_) + flush_newline_if_pending(src) + super + end + + def flush_newline_if_pending(src) + if @newline_pending > 0 + src << "@output_buffer.safe_append='#{"\n" * @newline_pending}'.freeze;" + @newline_pending = 0 + end + end + end + end + end + end +end diff --git a/actionview/lib/action_view/template/handlers/erb/erubis.rb b/actionview/lib/action_view/template/handlers/erb/erubis.rb new file mode 100644 index 0000000000..dc3bf1ff27 --- /dev/null +++ b/actionview/lib/action_view/template/handlers/erb/erubis.rb @@ -0,0 +1,83 @@ +# frozen_string_literal: true + +gem "erubis" +require "erubis" + +module ActionView + class Template + module Handlers + class ERB + class Erubis < ::Erubis::Eruby + # :nodoc: all + def add_preamble(src) + @newline_pending = 0 + src << "@output_buffer = output_buffer || ActionView::OutputBuffer.new;" + end + + def add_text(src, text) + return if text.empty? + + if text == "\n" + @newline_pending += 1 + else + src << "@output_buffer.safe_append='" + src << "\n" * @newline_pending if @newline_pending > 0 + src << escape_text(text) + src << "'.freeze;" + + @newline_pending = 0 + end + end + + # Erubis toggles <%= and <%== behavior when escaping is enabled. + # We override to always treat <%== as escaped. + def add_expr(src, code, indicator) + case indicator + when "==" + add_expr_escaped(src, code) + else + super + end + end + + BLOCK_EXPR = /\s*((\s+|\))do|\{)(\s*\|[^|]*\|)?\s*\Z/ + + def add_expr_literal(src, code) + flush_newline_if_pending(src) + if BLOCK_EXPR.match?(code) + src << "@output_buffer.append= " << code + else + src << "@output_buffer.append=(" << code << ");" + end + end + + def add_expr_escaped(src, code) + flush_newline_if_pending(src) + if BLOCK_EXPR.match?(code) + src << "@output_buffer.safe_expr_append= " << code + else + src << "@output_buffer.safe_expr_append=(" << code << ");" + end + end + + def add_stmt(src, code) + flush_newline_if_pending(src) + super + end + + def add_postamble(src) + flush_newline_if_pending(src) + src << "@output_buffer.to_s" + end + + def flush_newline_if_pending(src) + if @newline_pending > 0 + src << "@output_buffer.safe_append='#{"\n" * @newline_pending}'.freeze;" + @newline_pending = 0 + end + end + end + end + end + end +end diff --git a/actionview/lib/action_view/template/handlers/html.rb b/actionview/lib/action_view/template/handlers/html.rb new file mode 100644 index 0000000000..27004a318c --- /dev/null +++ b/actionview/lib/action_view/template/handlers/html.rb @@ -0,0 +1,11 @@ +# frozen_string_literal: true + +module ActionView + module Template::Handlers + class Html < Raw + def call(template) + "ActionView::OutputBuffer.new #{super}" + end + end + end +end diff --git a/actionview/lib/action_view/template/handlers/raw.rb b/actionview/lib/action_view/template/handlers/raw.rb new file mode 100644 index 0000000000..5cd23a0060 --- /dev/null +++ b/actionview/lib/action_view/template/handlers/raw.rb @@ -0,0 +1,11 @@ +# frozen_string_literal: true + +module ActionView + module Template::Handlers + class Raw + def call(template) + "#{template.source.inspect}.html_safe;" + end + end + end +end |