class ActionView::Template::Handlers::ERB
Constants
- ENCODING_TAG
Public Class Methods
call(template, source)
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# File lib/action_view/template/handlers/erb.rb, line 29 def self.call(template, source) new.call(template, source) end
Public Instance Methods
call(template, source)
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# File lib/action_view/template/handlers/erb.rb, line 61 def call(template, source) # 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 = source.b erb = template_source.gsub(ENCODING_TAG, "") encoding = $2 erb.force_encoding valid_encoding(source.dup, encoding) # Always make sure we return a String in the default_internal erb.encode! # Strip trailing newlines from the template if enabled erb.chomp! if strip_trailing_newlines options = { escape: (self.class.escape_ignore_list.include? template.type), trim: (self.class.erb_trim_mode == "-") } if ActionView::Base.annotate_rendered_view_with_filenames && template.format == :html options[:preamble] = "@output_buffer.safe_append='<!-- BEGIN #{template.short_identifier} -->';" options[:postamble] = "@output_buffer.safe_append='<!-- END #{template.short_identifier} -->';@output_buffer" end self.class.erb_implementation.new(erb, options).src end
handles_encoding?()
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# File lib/action_view/template/handlers/erb.rb, line 37 def handles_encoding? true end
supports_streaming?()
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# File lib/action_view/template/handlers/erb.rb, line 33 def supports_streaming? true end
translate_location(spot, backtrace_location, source)
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Translate an error location returned by ErrorHighlight to the correct source location inside the template.
# File lib/action_view/template/handlers/erb.rb, line 43 def translate_location(spot, backtrace_location, source) # Tokenize the source line tokens = ::ERB::Util.tokenize(source.lines[backtrace_location.lineno - 1]) new_first_column = find_offset(spot[:snippet], tokens, spot[:first_column]) lineno_delta = spot[:first_lineno] - backtrace_location.lineno spot[:first_lineno] -= lineno_delta spot[:last_lineno] -= lineno_delta column_delta = spot[:first_column] - new_first_column spot[:first_column] -= column_delta spot[:last_column] -= column_delta spot[:script_lines] = source.lines spot rescue NotImplementedError, LocationParsingError nil end
Private Instance Methods
find_offset(compiled, source_tokens, error_column)
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# File lib/action_view/template/handlers/erb.rb, line 108 def find_offset(compiled, source_tokens, error_column) compiled = StringScanner.new(compiled) passed_tokens = [] while tok = source_tokens.shift tok_name, str = *tok case tok_name when :TEXT loop do break if compiled.match?(str) compiled.getch end raise LocationParsingError unless compiled.scan(str) when :CODE if compiled.pos > error_column raise LocationParsingError, "We went too far" end if compiled.pos + str.bytesize >= error_column offset = error_column - compiled.pos return passed_tokens.map(&:last).join.bytesize + offset else unless compiled.scan(str) raise LocationParsingError, "Couldn't find code snippet" end end when :OPEN next_tok = source_tokens.first.last loop do break if compiled.match?(next_tok) compiled.getch end when :CLOSE next_tok = source_tokens.first.last loop do break if compiled.match?(next_tok) compiled.getch end else raise LocationParsingError, "Not implemented: #{tok.first}" end passed_tokens << tok end end
valid_encoding(string, encoding)
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# File lib/action_view/template/handlers/erb.rb, line 93 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