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authorJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-16 18:49:26 +0900
committerJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-30 00:39:06 +0900
commitfcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch)
tree64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/lib/erb.rb
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+# -*- coding: us-ascii -*-
+# = ERB -- Ruby Templating
+#
+# Author:: Masatoshi SEKI
+# Documentation:: James Edward Gray II, Gavin Sinclair, and Simon Chiang
+#
+# See ERB for primary documentation and ERB::Util for a couple of utility
+# routines.
+#
+# Copyright (c) 1999-2000,2002,2003 Masatoshi SEKI
+#
+# You can redistribute it and/or modify it under the same terms as Ruby.
+
+require "cgi/util"
+
+#
+# = ERB -- Ruby Templating
+#
+# == Introduction
+#
+# ERB provides an easy to use but powerful templating system for Ruby. Using
+# ERB, actual Ruby code can be added to any plain text document for the
+# purposes of generating document information details and/or flow control.
+#
+# A very simple example is this:
+#
+# require 'erb'
+#
+# x = 42
+# template = ERB.new <<-EOF
+# The value of x is: <%= x %>
+# EOF
+# puts template.result(binding)
+#
+# <em>Prints:</em> The value of x is: 42
+#
+# More complex examples are given below.
+#
+#
+# == Recognized Tags
+#
+# ERB recognizes certain tags in the provided template and converts them based
+# on the rules below:
+#
+# <% Ruby code -- inline with output %>
+# <%= Ruby expression -- replace with result %>
+# <%# comment -- ignored -- useful in testing %>
+# % a line of Ruby code -- treated as <% line %> (optional -- see ERB.new)
+# %% replaced with % if first thing on a line and % processing is used
+# <%% or %%> -- replace with <% or %> respectively
+#
+# All other text is passed through ERB filtering unchanged.
+#
+#
+# == Options
+#
+# There are several settings you can change when you use ERB:
+# * the nature of the tags that are recognized;
+# * the value of <tt>$SAFE</tt> under which the template is run;
+# * the binding used to resolve local variables in the template.
+#
+# See the ERB.new and ERB#result methods for more detail.
+#
+# == Character encodings
+#
+# ERB (or Ruby code generated by ERB) returns a string in the same
+# character encoding as the input string. When the input string has
+# a magic comment, however, it returns a string in the encoding specified
+# by the magic comment.
+#
+# # -*- coding: utf-8 -*-
+# require 'erb'
+#
+# template = ERB.new <<EOF
+# <%#-*- coding: Big5 -*-%>
+# \_\_ENCODING\_\_ is <%= \_\_ENCODING\_\_ %>.
+# EOF
+# puts template.result
+#
+# <em>Prints:</em> \_\_ENCODING\_\_ is Big5.
+#
+#
+# == Examples
+#
+# === Plain Text
+#
+# ERB is useful for any generic templating situation. Note that in this example, we use the
+# convenient "% at start of line" tag, and we quote the template literally with
+# <tt>%q{...}</tt> to avoid trouble with the backslash.
+#
+# require "erb"
+#
+# # Create template.
+# template = %q{
+# From: James Edward Gray II <james@grayproductions.net>
+# To: <%= to %>
+# Subject: Addressing Needs
+#
+# <%= to[/\w+/] %>:
+#
+# Just wanted to send a quick note assuring that your needs are being
+# addressed.
+#
+# I want you to know that my team will keep working on the issues,
+# especially:
+#
+# <%# ignore numerous minor requests -- focus on priorities %>
+# % priorities.each do |priority|
+# * <%= priority %>
+# % end
+#
+# Thanks for your patience.
+#
+# James Edward Gray II
+# }.gsub(/^ /, '')
+#
+# message = ERB.new(template, 0, "%<>")
+#
+# # Set up template data.
+# to = "Community Spokesman <spokesman@ruby_community.org>"
+# priorities = [ "Run Ruby Quiz",
+# "Document Modules",
+# "Answer Questions on Ruby Talk" ]
+#
+# # Produce result.
+# email = message.result
+# puts email
+#
+# <i>Generates:</i>
+#
+# From: James Edward Gray II <james@grayproductions.net>
+# To: Community Spokesman <spokesman@ruby_community.org>
+# Subject: Addressing Needs
+#
+# Community:
+#
+# Just wanted to send a quick note assuring that your needs are being addressed.
+#
+# I want you to know that my team will keep working on the issues, especially:
+#
+# * Run Ruby Quiz
+# * Document Modules
+# * Answer Questions on Ruby Talk
+#
+# Thanks for your patience.
+#
+# James Edward Gray II
+#
+# === Ruby in HTML
+#
+# ERB is often used in <tt>.rhtml</tt> files (HTML with embedded Ruby). Notice the need in
+# this example to provide a special binding when the template is run, so that the instance
+# variables in the Product object can be resolved.
+#
+# require "erb"
+#
+# # Build template data class.
+# class Product
+# def initialize( code, name, desc, cost )
+# @code = code
+# @name = name
+# @desc = desc
+# @cost = cost
+#
+# @features = [ ]
+# end
+#
+# def add_feature( feature )
+# @features << feature
+# end
+#
+# # Support templating of member data.
+# def get_binding
+# binding
+# end
+#
+# # ...
+# end
+#
+# # Create template.
+# template = %{
+# <html>
+# <head><title>Ruby Toys -- <%= @name %></title></head>
+# <body>
+#
+# <h1><%= @name %> (<%= @code %>)</h1>
+# <p><%= @desc %></p>
+#
+# <ul>
+# <% @features.each do |f| %>
+# <li><b><%= f %></b></li>
+# <% end %>
+# </ul>
+#
+# <p>
+# <% if @cost < 10 %>
+# <b>Only <%= @cost %>!!!</b>
+# <% else %>
+# Call for a price, today!
+# <% end %>
+# </p>
+#
+# </body>
+# </html>
+# }.gsub(/^ /, '')
+#
+# rhtml = ERB.new(template)
+#
+# # Set up template data.
+# toy = Product.new( "TZ-1002",
+# "Rubysapien",
+# "Geek's Best Friend! Responds to Ruby commands...",
+# 999.95 )
+# toy.add_feature("Listens for verbal commands in the Ruby language!")
+# toy.add_feature("Ignores Perl, Java, and all C variants.")
+# toy.add_feature("Karate-Chop Action!!!")
+# toy.add_feature("Matz signature on left leg.")
+# toy.add_feature("Gem studded eyes... Rubies, of course!")
+#
+# # Produce result.
+# rhtml.run(toy.get_binding)
+#
+# <i>Generates (some blank lines removed):</i>
+#
+# <html>
+# <head><title>Ruby Toys -- Rubysapien</title></head>
+# <body>
+#
+# <h1>Rubysapien (TZ-1002)</h1>
+# <p>Geek's Best Friend! Responds to Ruby commands...</p>
+#
+# <ul>
+# <li><b>Listens for verbal commands in the Ruby language!</b></li>
+# <li><b>Ignores Perl, Java, and all C variants.</b></li>
+# <li><b>Karate-Chop Action!!!</b></li>
+# <li><b>Matz signature on left leg.</b></li>
+# <li><b>Gem studded eyes... Rubies, of course!</b></li>
+# </ul>
+#
+# <p>
+# Call for a price, today!
+# </p>
+#
+# </body>
+# </html>
+#
+#
+# == Notes
+#
+# There are a variety of templating solutions available in various Ruby projects:
+# * ERB's big brother, eRuby, works the same but is written in C for speed;
+# * Amrita (smart at producing HTML/XML);
+# * cs/Template (written in C for speed);
+# * RDoc, distributed with Ruby, uses its own template engine, which can be reused elsewhere;
+# * and others; search {RubyGems.org}[https://rubygems.org/] or
+# {The Ruby Toolbox}[https://www.ruby-toolbox.com/].
+#
+# Rails, the web application framework, uses ERB to create views.
+#
+class ERB
+ Revision = '$Date:: 2014-12-12 19:48:57 +0900#$' # :nodoc: #'
+
+ # Returns revision information for the erb.rb module.
+ def self.version
+ "erb.rb [2.1.0 #{ERB::Revision.split[1]}]"
+ end
+end
+
+#--
+# ERB::Compiler
+class ERB
+ # = ERB::Compiler
+ #
+ # Compiles ERB templates into Ruby code; the compiled code produces the
+ # template result when evaluated. ERB::Compiler provides hooks to define how
+ # generated output is handled.
+ #
+ # Internally ERB does something like this to generate the code returned by
+ # ERB#src:
+ #
+ # compiler = ERB::Compiler.new('<>')
+ # compiler.pre_cmd = ["_erbout=''"]
+ # compiler.put_cmd = "_erbout.concat"
+ # compiler.insert_cmd = "_erbout.concat"
+ # compiler.post_cmd = ["_erbout"]
+ #
+ # code, enc = compiler.compile("Got <%= obj %>!\n")
+ # puts code
+ #
+ # <i>Generates</i>:
+ #
+ # #coding:UTF-8
+ # _erbout=''; _erbout.concat "Got "; _erbout.concat(( obj ).to_s); _erbout.concat "!\n"; _erbout
+ #
+ # By default the output is sent to the print method. For example:
+ #
+ # compiler = ERB::Compiler.new('<>')
+ # code, enc = compiler.compile("Got <%= obj %>!\n")
+ # puts code
+ #
+ # <i>Generates</i>:
+ #
+ # #coding:UTF-8
+ # print "Got "; print(( obj ).to_s); print "!\n"
+ #
+ # == Evaluation
+ #
+ # The compiled code can be used in any context where the names in the code
+ # correctly resolve. Using the last example, each of these print 'Got It!'
+ #
+ # Evaluate using a variable:
+ #
+ # obj = 'It'
+ # eval code
+ #
+ # Evaluate using an input:
+ #
+ # mod = Module.new
+ # mod.module_eval %{
+ # def get(obj)
+ # #{code}
+ # end
+ # }
+ # extend mod
+ # get('It')
+ #
+ # Evaluate using an accessor:
+ #
+ # klass = Class.new Object
+ # klass.class_eval %{
+ # attr_accessor :obj
+ # def initialize(obj)
+ # @obj = obj
+ # end
+ # def get_it
+ # #{code}
+ # end
+ # }
+ # klass.new('It').get_it
+ #
+ # Good! See also ERB#def_method, ERB#def_module, and ERB#def_class.
+ class Compiler # :nodoc:
+ class PercentLine # :nodoc:
+ def initialize(str)
+ @value = str
+ end
+ attr_reader :value
+ alias :to_s :value
+
+ def empty?
+ @value.empty?
+ end
+ end
+
+ class Scanner # :nodoc:
+ @scanner_map = {}
+ def self.regist_scanner(klass, trim_mode, percent)
+ @scanner_map[[trim_mode, percent]] = klass
+ end
+
+ def self.default_scanner=(klass)
+ @default_scanner = klass
+ end
+
+ def self.make_scanner(src, trim_mode, percent)
+ klass = @scanner_map.fetch([trim_mode, percent], @default_scanner)
+ klass.new(src, trim_mode, percent)
+ end
+
+ def initialize(src, trim_mode, percent)
+ @src = src
+ @stag = nil
+ end
+ attr_accessor :stag
+
+ def scan; end
+ end
+
+ class TrimScanner < Scanner # :nodoc:
+ def initialize(src, trim_mode, percent)
+ super
+ @trim_mode = trim_mode
+ @percent = percent
+ if @trim_mode == '>'
+ @scan_line = self.method(:trim_line1)
+ elsif @trim_mode == '<>'
+ @scan_line = self.method(:trim_line2)
+ elsif @trim_mode == '-'
+ @scan_line = self.method(:explicit_trim_line)
+ else
+ @scan_line = self.method(:scan_line)
+ end
+ end
+ attr_accessor :stag
+
+ def scan(&block)
+ @stag = nil
+ if @percent
+ @src.each_line do |line|
+ percent_line(line, &block)
+ end
+ else
+ @scan_line.call(@src, &block)
+ end
+ nil
+ end
+
+ def percent_line(line, &block)
+ if @stag || line[0] != ?%
+ return @scan_line.call(line, &block)
+ end
+
+ line[0] = ''
+ if line[0] == ?%
+ @scan_line.call(line, &block)
+ else
+ yield(PercentLine.new(line.chomp))
+ end
+ end
+
+ def scan_line(line)
+ line.scan(/(.*?)(<%%|%%>|<%=|<%#|<%|%>|\n|\z)/m) do |tokens|
+ tokens.each do |token|
+ next if token.empty?
+ yield(token)
+ end
+ end
+ end
+
+ def trim_line1(line)
+ line.scan(/(.*?)(<%%|%%>|<%=|<%#|<%|%>\n|%>|\n|\z)/m) do |tokens|
+ tokens.each do |token|
+ next if token.empty?
+ if token == "%>\n"
+ yield('%>')
+ yield(:cr)
+ else
+ yield(token)
+ end
+ end
+ end
+ end
+
+ def trim_line2(line)
+ head = nil
+ line.scan(/(.*?)(<%%|%%>|<%=|<%#|<%|%>\n|%>|\n|\z)/m) do |tokens|
+ tokens.each do |token|
+ next if token.empty?
+ head = token unless head
+ if token == "%>\n"
+ yield('%>')
+ if is_erb_stag?(head)
+ yield(:cr)
+ else
+ yield("\n")
+ end
+ head = nil
+ else
+ yield(token)
+ head = nil if token == "\n"
+ end
+ end
+ end
+ end
+
+ def explicit_trim_line(line)
+ line.scan(/(.*?)(^[ \t]*<%\-|<%\-|<%%|%%>|<%=|<%#|<%|-%>\n|-%>|%>|\z)/m) do |tokens|
+ tokens.each do |token|
+ next if token.empty?
+ if @stag.nil? && /[ \t]*<%-/ =~ token
+ yield('<%')
+ elsif @stag && token == "-%>\n"
+ yield('%>')
+ yield(:cr)
+ elsif @stag && token == '-%>'
+ yield('%>')
+ else
+ yield(token)
+ end
+ end
+ end
+ end
+
+ ERB_STAG = %w(<%= <%# <%)
+ def is_erb_stag?(s)
+ ERB_STAG.member?(s)
+ end
+ end
+
+ Scanner.default_scanner = TrimScanner
+
+ class SimpleScanner < Scanner # :nodoc:
+ def scan
+ @src.scan(/(.*?)(<%%|%%>|<%=|<%#|<%|%>|\n|\z)/m) do |tokens|
+ tokens.each do |token|
+ next if token.empty?
+ yield(token)
+ end
+ end
+ end
+ end
+
+ Scanner.regist_scanner(SimpleScanner, nil, false)
+
+ begin
+ require 'strscan'
+ class SimpleScanner2 < Scanner # :nodoc:
+ def scan
+ stag_reg = /(.*?)(<%%|<%=|<%#|<%|\z)/m
+ etag_reg = /(.*?)(%%>|%>|\z)/m
+ scanner = StringScanner.new(@src)
+ while ! scanner.eos?
+ scanner.scan(@stag ? etag_reg : stag_reg)
+ yield(scanner[1])
+ yield(scanner[2])
+ end
+ end
+ end
+ Scanner.regist_scanner(SimpleScanner2, nil, false)
+
+ class ExplicitScanner < Scanner # :nodoc:
+ def scan
+ stag_reg = /(.*?)(^[ \t]*<%-|<%%|<%=|<%#|<%-|<%|\z)/m
+ etag_reg = /(.*?)(%%>|-%>|%>|\z)/m
+ scanner = StringScanner.new(@src)
+ while ! scanner.eos?
+ scanner.scan(@stag ? etag_reg : stag_reg)
+ yield(scanner[1])
+
+ elem = scanner[2]
+ if /[ \t]*<%-/ =~ elem
+ yield('<%')
+ elsif elem == '-%>'
+ yield('%>')
+ yield(:cr) if scanner.scan(/(\n|\z)/)
+ else
+ yield(elem)
+ end
+ end
+ end
+ end
+ Scanner.regist_scanner(ExplicitScanner, '-', false)
+
+ rescue LoadError
+ end
+
+ class Buffer # :nodoc:
+ def initialize(compiler, enc=nil)
+ @compiler = compiler
+ @line = []
+ @script = enc ? "#coding:#{enc}\n" : ""
+ @compiler.pre_cmd.each do |x|
+ push(x)
+ end
+ end
+ attr_reader :script
+
+ def push(cmd)
+ @line << cmd
+ end
+
+ def cr
+ @script << (@line.join('; '))
+ @line = []
+ @script << "\n"
+ end
+
+ def close
+ return unless @line
+ @compiler.post_cmd.each do |x|
+ push(x)
+ end
+ @script << (@line.join('; '))
+ @line = nil
+ end
+ end
+
+ def content_dump(s) # :nodoc:
+ n = s.count("\n")
+ if n > 0
+ s.dump + "\n" * n
+ else
+ s.dump
+ end
+ end
+
+ def add_put_cmd(out, content)
+ out.push("#{@put_cmd} #{content_dump(content)}")
+ end
+
+ def add_insert_cmd(out, content)
+ out.push("#{@insert_cmd}((#{content}).to_s)")
+ end
+
+ # Compiles an ERB template into Ruby code. Returns an array of the code
+ # and encoding like ["code", Encoding].
+ def compile(s)
+ enc = s.encoding
+ raise ArgumentError, "#{enc} is not ASCII compatible" if enc.dummy?
+ s = s.b # see String#b
+ enc = detect_magic_comment(s) || enc
+ out = Buffer.new(self, enc)
+
+ content = ''
+ scanner = make_scanner(s)
+ scanner.scan do |token|
+ next if token.nil?
+ next if token == ''
+ if scanner.stag.nil?
+ case token
+ when PercentLine
+ add_put_cmd(out, content) if content.size > 0
+ content = ''
+ out.push(token.to_s)
+ out.cr
+ when :cr
+ out.cr
+ when '<%', '<%=', '<%#'
+ scanner.stag = token
+ add_put_cmd(out, content) if content.size > 0
+ content = ''
+ when "\n"
+ content << "\n"
+ add_put_cmd(out, content)
+ content = ''
+ when '<%%'
+ content << '<%'
+ else
+ content << token
+ end
+ else
+ case token
+ when '%>'
+ case scanner.stag
+ when '<%'
+ if content[-1] == ?\n
+ content.chop!
+ out.push(content)
+ out.cr
+ else
+ out.push(content)
+ end
+ when '<%='
+ add_insert_cmd(out, content)
+ when '<%#'
+ # out.push("# #{content_dump(content)}")
+ end
+ scanner.stag = nil
+ content = ''
+ when '%%>'
+ content << '%>'
+ else
+ content << token
+ end
+ end
+ end
+ add_put_cmd(out, content) if content.size > 0
+ out.close
+ return out.script, enc
+ end
+
+ def prepare_trim_mode(mode) # :nodoc:
+ case mode
+ when 1
+ return [false, '>']
+ when 2
+ return [false, '<>']
+ when 0
+ return [false, nil]
+ when String
+ perc = mode.include?('%')
+ if mode.include?('-')
+ return [perc, '-']
+ elsif mode.include?('<>')
+ return [perc, '<>']
+ elsif mode.include?('>')
+ return [perc, '>']
+ else
+ [perc, nil]
+ end
+ else
+ return [false, nil]
+ end
+ end
+
+ def make_scanner(src) # :nodoc:
+ Scanner.make_scanner(src, @trim_mode, @percent)
+ end
+
+ # Construct a new compiler using the trim_mode. See ERB::new for available
+ # trim modes.
+ def initialize(trim_mode)
+ @percent, @trim_mode = prepare_trim_mode(trim_mode)
+ @put_cmd = 'print'
+ @insert_cmd = @put_cmd
+ @pre_cmd = []
+ @post_cmd = []
+ end
+ attr_reader :percent, :trim_mode
+
+ # The command to handle text that ends with a newline
+ attr_accessor :put_cmd
+
+ # The command to handle text that is inserted prior to a newline
+ attr_accessor :insert_cmd
+
+ # An array of commands prepended to compiled code
+ attr_accessor :pre_cmd
+
+ # An array of commands appended to compiled code
+ attr_accessor :post_cmd
+
+ private
+ def detect_magic_comment(s)
+ if /\A<%#(.*)%>/ =~ s or (@percent and /\A%#(.*)/ =~ s)
+ comment = $1
+ comment = $1 if comment[/-\*-\s*(.*?)\s*-*-$/]
+ if %r"coding\s*[=:]\s*([[:alnum:]\-_]+)" =~ comment
+ enc = $1.sub(/-(?:mac|dos|unix)/i, '')
+ Encoding.find(enc)
+ end
+ end
+ end
+ end
+end
+
+#--
+# ERB
+class ERB
+ #
+ # Constructs a new ERB object with the template specified in _str_.
+ #
+ # An ERB object works by building a chunk of Ruby code that will output
+ # the completed template when run. If _safe_level_ is set to a non-nil value,
+ # ERB code will be run in a separate thread with <b>$SAFE</b> set to the
+ # provided level.
+ #
+ # If _trim_mode_ is passed a String containing one or more of the following
+ # modifiers, ERB will adjust its code generation as listed:
+ #
+ # % enables Ruby code processing for lines beginning with %
+ # <> omit newline for lines starting with <% and ending in %>
+ # > omit newline for lines ending in %>
+ # - omit blank lines ending in -%>
+ #
+ # _eoutvar_ can be used to set the name of the variable ERB will build up
+ # its output in. This is useful when you need to run multiple ERB
+ # templates through the same binding and/or when you want to control where
+ # output ends up. Pass the name of the variable to be used inside a String.
+ #
+ # === Example
+ #
+ # require "erb"
+ #
+ # # build data class
+ # class Listings
+ # PRODUCT = { :name => "Chicken Fried Steak",
+ # :desc => "A well messages pattie, breaded and fried.",
+ # :cost => 9.95 }
+ #
+ # attr_reader :product, :price
+ #
+ # def initialize( product = "", price = "" )
+ # @product = product
+ # @price = price
+ # end
+ #
+ # def build
+ # b = binding
+ # # create and run templates, filling member data variables
+ # ERB.new(<<-'END_PRODUCT'.gsub(/^\s+/, ""), 0, "", "@product").result b
+ # <%= PRODUCT[:name] %>
+ # <%= PRODUCT[:desc] %>
+ # END_PRODUCT
+ # ERB.new(<<-'END_PRICE'.gsub(/^\s+/, ""), 0, "", "@price").result b
+ # <%= PRODUCT[:name] %> -- <%= PRODUCT[:cost] %>
+ # <%= PRODUCT[:desc] %>
+ # END_PRICE
+ # end
+ # end
+ #
+ # # setup template data
+ # listings = Listings.new
+ # listings.build
+ #
+ # puts listings.product + "\n" + listings.price
+ #
+ # _Generates_
+ #
+ # Chicken Fried Steak
+ # A well messages pattie, breaded and fried.
+ #
+ # Chicken Fried Steak -- 9.95
+ # A well messages pattie, breaded and fried.
+ #
+ def initialize(str, safe_level=nil, trim_mode=nil, eoutvar='_erbout')
+ @safe_level = safe_level
+ compiler = make_compiler(trim_mode)
+ set_eoutvar(compiler, eoutvar)
+ @src, @encoding = *compiler.compile(str)
+ @filename = nil
+ @lineno = 0
+ end
+
+ ##
+ # Creates a new compiler for ERB. See ERB::Compiler.new for details
+
+ def make_compiler(trim_mode)
+ ERB::Compiler.new(trim_mode)
+ end
+
+ # The Ruby code generated by ERB
+ attr_reader :src
+
+ # The encoding to eval
+ attr_reader :encoding
+
+ # The optional _filename_ argument passed to Kernel#eval when the ERB code
+ # is run
+ attr_accessor :filename
+
+ # The optional _lineno_ argument passed to Kernel#eval when the ERB code
+ # is run
+ attr_accessor :lineno
+
+ def location=((filename, lineno))
+ @filename = filename
+ @lineno = lineno if lineno
+ end
+
+ #
+ # Can be used to set _eoutvar_ as described in ERB::new. It's probably
+ # easier to just use the constructor though, since calling this method
+ # requires the setup of an ERB _compiler_ object.
+ #
+ def set_eoutvar(compiler, eoutvar = '_erbout')
+ compiler.put_cmd = "#{eoutvar}.concat"
+ compiler.insert_cmd = "#{eoutvar}.concat"
+ compiler.pre_cmd = ["#{eoutvar} = ''"]
+ compiler.post_cmd = ["#{eoutvar}.force_encoding(__ENCODING__)"]
+ end
+
+ # Generate results and print them. (see ERB#result)
+ def run(b=new_toplevel)
+ print self.result(b)
+ end
+
+ #
+ # Executes the generated ERB code to produce a completed template, returning
+ # the results of that code. (See ERB::new for details on how this process
+ # can be affected by _safe_level_.)
+ #
+ # _b_ accepts a Binding object which is used to set the context of
+ # code evaluation.
+ #
+ def result(b=new_toplevel)
+ if @safe_level
+ proc {
+ $SAFE = @safe_level
+ eval(@src, b, (@filename || '(erb)'), @lineno)
+ }.call
+ else
+ eval(@src, b, (@filename || '(erb)'), @lineno)
+ end
+ end
+
+ ##
+ # Returns a new binding each time *near* TOPLEVEL_BINDING for runs that do
+ # not specify a binding.
+
+ def new_toplevel
+ TOPLEVEL_BINDING.dup
+ end
+ private :new_toplevel
+
+ # Define _methodname_ as instance method of _mod_ from compiled Ruby source.
+ #
+ # example:
+ # filename = 'example.rhtml' # 'arg1' and 'arg2' are used in example.rhtml
+ # erb = ERB.new(File.read(filename))
+ # erb.def_method(MyClass, 'render(arg1, arg2)', filename)
+ # print MyClass.new.render('foo', 123)
+ def def_method(mod, methodname, fname='(ERB)')
+ src = self.src
+ magic_comment = "#coding:#{@encoding}\n"
+ mod.module_eval do
+ eval(magic_comment + "def #{methodname}\n" + src + "\nend\n", binding, fname, -2)
+ end
+ end
+
+ # Create unnamed module, define _methodname_ as instance method of it, and return it.
+ #
+ # example:
+ # filename = 'example.rhtml' # 'arg1' and 'arg2' are used in example.rhtml
+ # erb = ERB.new(File.read(filename))
+ # erb.filename = filename
+ # MyModule = erb.def_module('render(arg1, arg2)')
+ # class MyClass
+ # include MyModule
+ # end
+ def def_module(methodname='erb')
+ mod = Module.new
+ def_method(mod, methodname, @filename || '(ERB)')
+ mod
+ end
+
+ # Define unnamed class which has _methodname_ as instance method, and return it.
+ #
+ # example:
+ # class MyClass_
+ # def initialize(arg1, arg2)
+ # @arg1 = arg1; @arg2 = arg2
+ # end
+ # end
+ # filename = 'example.rhtml' # @arg1 and @arg2 are used in example.rhtml
+ # erb = ERB.new(File.read(filename))
+ # erb.filename = filename
+ # MyClass = erb.def_class(MyClass_, 'render()')
+ # print MyClass.new('foo', 123).render()
+ def def_class(superklass=Object, methodname='result')
+ cls = Class.new(superklass)
+ def_method(cls, methodname, @filename || '(ERB)')
+ cls
+ end
+end
+
+#--
+# ERB::Util
+class ERB
+ # A utility module for conversion routines, often handy in HTML generation.
+ module Util
+ public
+ #
+ # A utility method for escaping HTML tag characters in _s_.
+ #
+ # require "erb"
+ # include ERB::Util
+ #
+ # puts html_escape("is a > 0 & a < 10?")
+ #
+ # _Generates_
+ #
+ # is a &gt; 0 &amp; a &lt; 10?
+ #
+ def html_escape(s)
+ CGI.escapeHTML(s.to_s)
+ end
+ alias h html_escape
+ module_function :h
+ module_function :html_escape
+
+ #
+ # A utility method for encoding the String _s_ as a URL.
+ #
+ # require "erb"
+ # include ERB::Util
+ #
+ # puts url_encode("Programming Ruby: The Pragmatic Programmer's Guide")
+ #
+ # _Generates_
+ #
+ # Programming%20Ruby%3A%20%20The%20Pragmatic%20Programmer%27s%20Guide
+ #
+ def url_encode(s)
+ s.to_s.b.gsub(/[^a-zA-Z0-9_\-.]/n) { |m|
+ sprintf("%%%02X", m.unpack("C")[0])
+ }
+ end
+ alias u url_encode
+ module_function :u
+ module_function :url_encode
+ end
+end
+
+#--
+# ERB::DefMethod
+class ERB
+ # Utility module to define eRuby script as instance method.
+ #
+ # === Example
+ #
+ # example.rhtml:
+ # <% for item in @items %>
+ # <b><%= item %></b>
+ # <% end %>
+ #
+ # example.rb:
+ # require 'erb'
+ # class MyClass
+ # extend ERB::DefMethod
+ # def_erb_method('render()', 'example.rhtml')
+ # def initialize(items)
+ # @items = items
+ # end
+ # end
+ # print MyClass.new([10,20,30]).render()
+ #
+ # result:
+ #
+ # <b>10</b>
+ #
+ # <b>20</b>
+ #
+ # <b>30</b>
+ #
+ module DefMethod
+ public
+ # define _methodname_ as instance method of current module, using ERB
+ # object or eRuby file
+ def def_erb_method(methodname, erb_or_fname)
+ if erb_or_fname.kind_of? String
+ fname = erb_or_fname
+ erb = ERB.new(File.read(fname))
+ erb.def_method(self, methodname, fname)
+ else
+ erb = erb_or_fname
+ erb.def_method(self, methodname, erb.filename || '(ERB)')
+ end
+ end
+ module_function :def_erb_method
+ end
+end