зеркало из https://github.com/github/ruby.git
823 строки
20 KiB
Ruby
823 строки
20 KiB
Ruby
# = ERB -- Ruby Templating
|
|
#
|
|
# Author:: Masatoshi SEKI
|
|
# Documentation:: James Edward Gray II and Gavin Sinclair
|
|
#
|
|
# 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.
|
|
|
|
#
|
|
# = 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.
|
|
#
|
|
#
|
|
# == 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 the RAA.
|
|
#
|
|
# Rails, the web application framework, uses ERB to create views.
|
|
#
|
|
class ERB
|
|
Revision = '$Date$' #'
|
|
|
|
# Returns revision information for the erb.rb module.
|
|
def self.version
|
|
"erb.rb [2.0.4 #{ERB::Revision.split[1]}]"
|
|
end
|
|
end
|
|
|
|
#--
|
|
# ERB::Compiler
|
|
class ERB
|
|
class Compiler # :nodoc:
|
|
class PercentLine # :nodoc:
|
|
def initialize(str)
|
|
@value = str
|
|
end
|
|
attr_reader :value
|
|
alias :to_s :value
|
|
end
|
|
|
|
class Scanner # :nodoc:
|
|
SplitRegexp = /(<%%)|(%%>)|(<%=)|(<%#)|(<%)|(%>)|(\n)/
|
|
|
|
@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:
|
|
TrimSplitRegexp = /(<%%)|(%%>)|(<%=)|(<%#)|(<%)|(%>\n)|(%>)|(\n)/
|
|
|
|
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 do |line|
|
|
percent_line(line, &block)
|
|
end
|
|
else
|
|
@src.each do |line|
|
|
@scan_line.call(line, &block)
|
|
end
|
|
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.split(SplitRegexp).each do |token|
|
|
next if token.empty?
|
|
yield(token)
|
|
end
|
|
end
|
|
|
|
def trim_line1(line)
|
|
line.split(TrimSplitRegexp).each do |token|
|
|
next if token.empty?
|
|
if token == "%>\n"
|
|
yield('%>')
|
|
yield(:cr)
|
|
break
|
|
end
|
|
yield(token)
|
|
end
|
|
end
|
|
|
|
def trim_line2(line)
|
|
head = nil
|
|
line.split(TrimSplitRegexp).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
|
|
break
|
|
end
|
|
yield(token)
|
|
end
|
|
end
|
|
|
|
ExplicitTrimRegexp = /(^[ \t]*<%-)|(-%>\n?\z)|(<%-)|(-%>)|(<%%)|(%%>)|(<%=)|(<%#)|(<%)|(%>)|(\n)/
|
|
def explicit_trim_line(line)
|
|
line.split(ExplicitTrimRegexp).each do |token|
|
|
next if token.empty?
|
|
if @stag.nil? && /[ \t]*<%-/ =~ token
|
|
yield('<%')
|
|
elsif @stag && /-%>\n/ =~ token
|
|
yield('%>')
|
|
yield(:cr)
|
|
elsif @stag && token == '-%>'
|
|
yield('%>')
|
|
else
|
|
yield(token)
|
|
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.each do |line|
|
|
line.split(SplitRegexp).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 = /(.*?)(<%%|<%=|<%#|<%|\n|\z)/
|
|
etag_reg = /(.*?)(%%>|%>|\n|\z)/
|
|
scanner = StringScanner.new(@src)
|
|
while ! scanner.eos?
|
|
scanner.scan(@stag ? etag_reg : stag_reg)
|
|
text = scanner[1]
|
|
elem = scanner[2]
|
|
yield(text) unless text.empty?
|
|
yield(elem) unless elem.empty?
|
|
end
|
|
end
|
|
end
|
|
Scanner.regist_scanner(SimpleScanner2, nil, false)
|
|
|
|
class PercentScanner < Scanner # :nodoc:
|
|
def scan
|
|
new_line = true
|
|
stag_reg = /(.*?)(<%%|<%=|<%#|<%|\n|\z)/
|
|
etag_reg = /(.*?)(%%>|%>|\n|\z)/
|
|
scanner = StringScanner.new(@src)
|
|
while ! scanner.eos?
|
|
if new_line && @stag.nil?
|
|
if scanner.scan(/%%/)
|
|
yield('%')
|
|
new_line = false
|
|
next
|
|
elsif scanner.scan(/%/)
|
|
yield(PercentLine.new(scanner.scan(/.*?(\n|\z)/).chomp))
|
|
next
|
|
end
|
|
end
|
|
scanner.scan(@stag ? etag_reg : stag_reg)
|
|
text = scanner[1]
|
|
elem = scanner[2]
|
|
yield(text) unless text.empty?
|
|
yield(elem) unless elem.empty?
|
|
new_line = (elem == "\n")
|
|
end
|
|
end
|
|
end
|
|
Scanner.regist_scanner(PercentScanner, nil, true)
|
|
|
|
class ExplicitScanner < Scanner # :nodoc:
|
|
def scan
|
|
new_line = true
|
|
stag_reg = /(.*?)(<%%|<%=|<%#|<%-|<%|\n|\z)/
|
|
etag_reg = /(.*?)(%%>|-%>|%>|\n|\z)/
|
|
scanner = StringScanner.new(@src)
|
|
while ! scanner.eos?
|
|
if new_line && @stag.nil? && scanner.scan(/[ \t]*<%-/)
|
|
yield('<%')
|
|
new_line = false
|
|
next
|
|
end
|
|
scanner.scan(@stag ? etag_reg : stag_reg)
|
|
text = scanner[1]
|
|
elem = scanner[2]
|
|
new_line = (elem == "\n")
|
|
yield(text) unless text.empty?
|
|
if elem == '-%>'
|
|
yield('%>')
|
|
if scanner.scan(/(\n|\z)/)
|
|
yield(:cr)
|
|
new_line = true
|
|
end
|
|
elsif elem == '<%-'
|
|
yield('<%')
|
|
else
|
|
yield(elem) unless elem.empty?
|
|
end
|
|
end
|
|
end
|
|
end
|
|
Scanner.regist_scanner(ExplicitScanner, '-', false)
|
|
|
|
rescue LoadError
|
|
end
|
|
|
|
class Buffer # :nodoc:
|
|
def initialize(compiler)
|
|
@compiler = compiler
|
|
@line = []
|
|
@script = ""
|
|
@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 compile(s)
|
|
out = Buffer.new(self)
|
|
|
|
content = ''
|
|
scanner = make_scanner(s)
|
|
scanner.scan do |token|
|
|
if scanner.stag.nil?
|
|
case token
|
|
when PercentLine
|
|
out.push("#{@put_cmd} #{content.dump}") if content.size > 0
|
|
content = ''
|
|
out.push(token.to_s)
|
|
out.cr
|
|
when :cr
|
|
out.cr
|
|
when '<%', '<%=', '<%#'
|
|
scanner.stag = token
|
|
out.push("#{@put_cmd} #{content.dump}") if content.size > 0
|
|
content = ''
|
|
when "\n"
|
|
content << "\n"
|
|
out.push("#{@put_cmd} #{content.dump}")
|
|
out.cr
|
|
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 '<%='
|
|
out.push("#{@put_cmd}((#{content}).to_s)")
|
|
when '<%#'
|
|
# out.push("# #{content.dump}")
|
|
end
|
|
scanner.stag = nil
|
|
content = ''
|
|
when '%%>'
|
|
content << '%>'
|
|
else
|
|
content << token
|
|
end
|
|
end
|
|
end
|
|
out.push("#{@put_cmd} #{content.dump}") if content.size > 0
|
|
out.close
|
|
out.script
|
|
end
|
|
|
|
def prepare_trim_mode(mode)
|
|
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)
|
|
Scanner.make_scanner(src, @trim_mode, @percent)
|
|
end
|
|
|
|
def initialize(trim_mode)
|
|
@percent, @trim_mode = prepare_trim_mode(trim_mode)
|
|
@put_cmd = 'print'
|
|
@pre_cmd = []
|
|
@post_cmd = []
|
|
end
|
|
attr_reader :percent, :trim_mode
|
|
attr_accessor :put_cmd, :pre_cmd, :post_cmd
|
|
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 %>
|
|
#
|
|
# _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 variebles
|
|
# 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 = ERB::Compiler.new(trim_mode)
|
|
set_eoutvar(compiler, eoutvar)
|
|
@src = compiler.compile(str)
|
|
@filename = nil
|
|
end
|
|
|
|
# The Ruby code generated by ERB
|
|
attr_reader :src
|
|
|
|
# The optional _filename_ argument passed to Kernel#eval when the ERB code
|
|
# is run
|
|
attr_accessor :filename
|
|
|
|
#
|
|
# 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"
|
|
|
|
cmd = []
|
|
cmd.push "#{eoutvar} = ''"
|
|
|
|
compiler.pre_cmd = cmd
|
|
|
|
cmd = []
|
|
cmd.push(eoutvar)
|
|
|
|
compiler.post_cmd = cmd
|
|
end
|
|
|
|
# Generate results and print them. (see ERB#result)
|
|
def run(b=TOPLEVEL_BINDING)
|
|
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 or Proc object which is used to set the context of
|
|
# code evaluation.
|
|
#
|
|
def result(b=TOPLEVEL_BINDING)
|
|
if @safe_level
|
|
th = Thread.start {
|
|
$SAFE = @safe_level
|
|
eval(@src, b, (@filename || '(erb)'), 1)
|
|
}
|
|
return th.value
|
|
else
|
|
return eval(@src, b, (@filename || '(erb)'), 1)
|
|
end
|
|
end
|
|
|
|
def def_method(mod, methodname, fname='(ERB)') # :nodoc:
|
|
mod.module_eval("def #{methodname}\n" + self.src + "\nend\n", fname, 0)
|
|
end
|
|
|
|
def def_module(methodname='erb') # :nodoc:
|
|
mod = Module.new
|
|
def_method(mod, methodname)
|
|
mod
|
|
end
|
|
|
|
def def_class(superklass=Object, methodname='result') # :nodoc:
|
|
cls = Class.new(superklass)
|
|
def_method(cls, methodname)
|
|
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 > 0 & a < 10?
|
|
#
|
|
def html_escape(s)
|
|
s.to_s.gsub(/&/, "&").gsub(/\"/, """).gsub(/>/, ">").gsub(/</, "<")
|
|
end
|
|
alias h 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.gsub(/[^a-zA-Z0-9_\-.]/n){ sprintf("%%%02X", $&.unpack("C")[0]) }
|
|
end
|
|
alias u url_encode
|
|
end
|
|
end
|
|
|
|
#--
|
|
# ERB::DefMethod
|
|
class ERB
|
|
module DefMethod # :nodoc:
|
|
public
|
|
def def_erb_method(methodname, erb)
|
|
if erb.kind_of? String
|
|
fname = erb
|
|
File.open(fname) {|f| erb = ERB.new(f.read) }
|
|
erb.def_method(self, methodname, fname)
|
|
else
|
|
erb.def_method(self, methodname)
|
|
end
|
|
end
|
|
module_function :def_erb_method
|
|
end
|
|
end
|
|
|
|
|