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# Tiny eRuby --- ERB2
# Copyright (c) 1999-2000,2002 Masatoshi SEKI
# You can redistribute it and/or modify it under the same terms as Ruby.
class ERB
Revision = '$Date$' #'
def self.version
"erb.rb [2.0.1 #{ERB::Revision.split[1]}]"
end
end
# ERB::Compiler
class ERB
class Compiler
ERbTag = "<%% %%> <%= <%# <% %>".split
private
def is_erb_tag?(s)
ERbTag.member?(s)
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, '>']
else
[perc, nil]
end
else
return [false, nil]
end
end
SplitRegexp = /(<%%)|(%%>)|(<%=)|(<%#)|(<%)|(%>)|(\n)/
public
def pre_compile(s, trim_mode)
perc, trim_mode = prepare_trim_mode(trim_mode)
re = SplitRegexp
if trim_mode.nil? && !perc
list = s.split(re)
else
list = []
has_cr = (s[-1] == ?\n)
s.each do |line|
line = line.chomp
if perc && (/^(%{1,2})/ =~ line)
line[0] = ''
if $1 == '%%'
list.push(line)
list.push("\n")
else
list.push('<%')
list.push(line)
list.push('%>')
end
else
line = line.split(re)
line.shift if line[0]==''
list += line
unless ((trim_mode == '>' && line[-1] == '%>') ||
(trim_mode == '<>' && (is_erb_tag?(line[0])) &&
line[-1] == '%>'))
list.push("\n")
end
end
end
list.pop unless has_cr
end
list
end
def compile(s)
list = pre_compile(s, @trim_mode)
cmd = []
cmd.concat(@pre_cmd)
stag = nil
content = []
while (token = list.shift)
if token == '<%%'
token = '<'
list.unshift '%'
elsif token == '%%>'
token = '%'
list.unshift '>'
end
if stag.nil?
if ['<%', '<%=', '<%#'].include?(token)
stag = token
str = content.join
if str.size > 0
cmd.push("#{@put_cmd} #{str.dump}")
end
content = []
elsif token == "\n"
content.push("\n")
cmd.push("#{@put_cmd} #{content.join.dump}")
cmd.push(:cr)
content = []
else
content.push(token)
end
else
if token == '%>'
case stag
when '<%'
str = content.join
if str[-1] == ?\n
str.chop!
cmd.push(str)
cmd.push(:cr)
else
cmd.push(str)
end
when '<%='
cmd.push("#{@put_cmd}((#{content.join}).to_s)")
when '<%#'
# cmd.push("# #{content.dump}")
end
stag = nil
content = []
else
content.push(token)
end
end
end
if content.size > 0
cmd.push("#{@put_cmd} #{content.join.dump}")
end
cmd.push(:cr)
cmd.concat(@post_cmd)
ary = []
cmd.each do |x|
if x == :cr
ary.pop
ary.push("\n")
else
ary.push(x)
ary.push('; ')
end
end
ary.join
end
def initialize
@trim_mode = nil
@put_cmd = 'print'
@pre_cmd = []
@post_cmd = []
end
attr :trim_mode, true
attr :put_cmd, true
attr :pre_cmd, true
attr :post_cmd, true
end
end
# ERB
class ERB
def initialize(str, safe_level=nil, trim_mode=nil, eoutvar='_erbout')
@safe_level = safe_level
compiler = ERB::Compiler.new
compiler.trim_mode = trim_mode
set_eoutvar(compiler, eoutvar)
@src = compiler.compile(str)
end
attr :src
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
def run(b=TOPLEVEL_BINDING)
print self.result(b)
end
def result(b=TOPLEVEL_BINDING)
if @safe_level
th = Thread.start {
$SAFE = @safe_level
eval(@src, b)
}
return th.value
else
return eval(@src, b)
end
end
def def_method(mod, methodname, fname='(ERB)')
mod.module_eval("def #{methodname}\n" + self.src + "\nend\n", fname, 0)
end
def def_module(methodname='erb')
mod = Module.new
def_method(mod, methodname)
mod
end
def def_class(superklass=Object, methodname='result')
cls = Class.new(superklass)
def_method(cls, methodname)
cls
end
end
# ERB::Util
class ERB
module Util
public
def html_escape(s)
s.to_s.gsub(/&/, "&").gsub(/\"/, """).gsub(/>/, ">").gsub(/</, "<")
end
alias h html_escape
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
public
def def_erb_method(methodname, erb)
if erb.kind_of? String
fname = erb
File.open(fname) {|f| erb = ERB.new(f.read) }
end
erb.def_method(self, methodname, fname)
end
module_function :def_erb_method
end
end
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