681 lines
15 KiB
Ruby
681 lines
15 KiB
Ruby
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##
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## $Release: 2.6.5 $
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## copyright(c) 2006-2009 kuwata-lab.com all rights reserved.
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##
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module Erubis
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##
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## switch '<%= ... %>' to escaped and '<%== ... %>' to unescaped
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##
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## ex.
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## class XmlEruby < Eruby
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## include EscapeEnhancer
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## end
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##
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## this is language-indenedent.
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##
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module EscapeEnhancer
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def self.desc # :nodoc:
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"switch '<%= %>' to escaped and '<%== %>' to unescaped"
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end
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#--
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#def self.included(klass)
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# klass.class_eval <<-END
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# alias _add_expr_literal add_expr_literal
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# alias _add_expr_escaped add_expr_escaped
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# alias add_expr_literal _add_expr_escaped
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# alias add_expr_escaped _add_expr_literal
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# END
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#end
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#++
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def add_expr(src, code, indicator)
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case indicator
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when '='
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@escape ? add_expr_literal(src, code) : add_expr_escaped(src, code)
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when '=='
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@escape ? add_expr_escaped(src, code) : add_expr_literal(src, code)
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when '==='
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add_expr_debug(src, code)
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end
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end
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end
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#--
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## (obsolete)
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#module FastEnhancer
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#end
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#++
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##
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## use $stdout instead of string
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##
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## this is only for Eruby.
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##
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module StdoutEnhancer
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def self.desc # :nodoc:
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"use $stdout instead of array buffer or string buffer"
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end
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def add_preamble(src)
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src << "_buf = $stdout;"
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end
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def add_postamble(src)
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src << "\n''\n"
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end
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end
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##
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## use print statement instead of '_buf << ...'
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##
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## this is only for Eruby.
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##
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module PrintOutEnhancer
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def self.desc # :nodoc:
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"use print statement instead of '_buf << ...'"
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end
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def add_preamble(src)
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end
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def add_text(src, text)
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src << " print '" << escape_text(text) << "';" unless text.empty?
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end
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def add_expr_literal(src, code)
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src << ' print((' << code << ').to_s);'
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end
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def add_expr_escaped(src, code)
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src << ' print ' << escaped_expr(code) << ';'
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end
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def add_postamble(src)
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src << "\n" unless src[-1] == ?\n
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end
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end
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##
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## enable print function
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##
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## Notice: use Eruby#evaluate() and don't use Eruby#result()
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## to be enable print function.
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##
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## this is only for Eruby.
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##
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module PrintEnabledEnhancer
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def self.desc # :nodoc:
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"enable to use print function in '<% %>'"
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end
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def add_preamble(src)
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src << "@_buf = "
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super
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end
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def print(*args)
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args.each do |arg|
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@_buf << arg.to_s
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end
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end
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def evaluate(context=nil)
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_src = @src
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if context.is_a?(Hash)
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context.each do |key, val| instance_variable_set("@#{key}", val) end
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elsif context
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context.instance_variables.each do |name|
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instance_variable_set(name, context.instance_variable_get(name))
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end
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end
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return instance_eval(_src, (@filename || '(erubis)'))
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end
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end
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##
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## return array instead of string
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##
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## this is only for Eruby.
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##
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module ArrayEnhancer
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def self.desc # :nodoc:
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"return array instead of string"
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end
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def add_preamble(src)
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src << "_buf = [];"
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end
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def add_postamble(src)
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src << "\n" unless src[-1] == ?\n
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src << "_buf\n"
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end
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end
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##
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## use an Array object as buffer (included in Eruby by default)
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##
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## this is only for Eruby.
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##
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module ArrayBufferEnhancer
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def self.desc # :nodoc:
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"use an Array object for buffering (included in Eruby class)"
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end
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def add_preamble(src)
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src << "_buf = [];"
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end
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def add_postamble(src)
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src << "\n" unless src[-1] == ?\n
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src << "_buf.join\n"
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end
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end
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##
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## use String class for buffering
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##
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## this is only for Eruby.
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##
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module StringBufferEnhancer
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def self.desc # :nodoc:
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"use a String object for buffering"
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end
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def add_preamble(src)
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src << "_buf = '';"
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end
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def add_postamble(src)
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src << "\n" unless src[-1] == ?\n
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src << "_buf.to_s\n"
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end
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end
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##
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## use StringIO class for buffering
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##
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## this is only for Eruby.
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##
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module StringIOEnhancer # :nodoc:
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def self.desc # :nodoc:
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"use a StringIO object for buffering"
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end
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def add_preamble(src)
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src << "_buf = StringIO.new;"
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end
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def add_postamble(src)
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src << "\n" unless src[-1] == ?\n
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src << "_buf.string\n"
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end
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end
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##
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## set buffer variable name to '_erbout' as well as '_buf'
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##
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## this is only for Eruby.
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##
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module ErboutEnhancer
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def self.desc # :nodoc:
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"set '_erbout = _buf = \"\";' to be compatible with ERB."
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end
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def add_preamble(src)
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src << "_erbout = _buf = '';"
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end
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def add_postamble(src)
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src << "\n" unless src[-1] == ?\n
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src << "_buf.to_s\n"
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end
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end
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##
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## remove text and leave code, especially useful when debugging.
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##
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## ex.
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## $ erubis -s -E NoText file.eruby | more
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##
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## this is language independent.
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##
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module NoTextEnhancer
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def self.desc # :nodoc:
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"remove text and leave code (useful when debugging)"
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end
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def add_text(src, text)
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src << ("\n" * text.count("\n"))
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if text[-1] != ?\n
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text =~ /^(.*?)\z/
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src << (' ' * $1.length)
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end
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end
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end
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##
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## remove code and leave text, especially useful when validating HTML tags.
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##
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## ex.
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## $ erubis -s -E NoCode file.eruby | tidy -errors
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##
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## this is language independent.
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##
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module NoCodeEnhancer
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def self.desc # :nodoc:
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"remove code and leave text (useful when validating HTML)"
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end
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def add_preamble(src)
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end
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def add_postamble(src)
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end
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def add_text(src, text)
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src << text
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end
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def add_expr(src, code, indicator)
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src << "\n" * code.count("\n")
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end
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def add_stmt(src, code)
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src << "\n" * code.count("\n")
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end
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end
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##
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## get convert faster, but spaces around '<%...%>' are not trimmed.
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##
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## this is language-independent.
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##
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module SimplifyEnhancer
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def self.desc # :nodoc:
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"get convert faster but leave spaces around '<% %>'"
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end
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#DEFAULT_REGEXP = /(^[ \t]*)?<%(=+|\#)?(.*?)-?%>([ \t]*\r?\n)?/m
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SIMPLE_REGEXP = /<%(=+|\#)?(.*?)-?%>/m
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def convert(input)
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src = ""
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add_preamble(src)
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#regexp = pattern_regexp(@pattern)
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pos = 0
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input.scan(SIMPLE_REGEXP) do |indicator, code|
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match = Regexp.last_match
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index = match.begin(0)
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text = input[pos, index - pos]
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pos = match.end(0)
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add_text(src, text)
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if !indicator # <% %>
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add_stmt(src, code)
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elsif indicator[0] == ?\# # <%# %>
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n = code.count("\n")
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add_stmt(src, "\n" * n)
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else # <%= %>
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add_expr(src, code, indicator)
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end
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end
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#rest = $' || input # ruby1.8
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rest = pos == 0 ? input : input[pos..-1] # ruby1.9
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add_text(src, rest)
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add_postamble(src)
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return src
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end
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end
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##
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## enable to use other embedded expression pattern (default is '\[= =\]').
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##
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## notice! this is an experimental. spec may change in the future.
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##
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## ex.
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## input = <<END
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## <% for item in list %>
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## <%= item %> : <%== item %>
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## [= item =] : [== item =]
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## <% end %>
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## END
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##
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## class BiPatternEruby
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## include BiPatternEnhancer
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## end
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## eruby = BiPatternEruby.new(input, :bipattern=>'\[= =\]')
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## list = ['<a>', 'b&b', '"c"']
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## print eruby.result(binding())
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##
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## ## output
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## <a> : <a>
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## <a> : <a>
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## b&b : b&b
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## b&b : b&b
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## "c" : "c"
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## "c" : "c"
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##
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## this is language independent.
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##
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module BiPatternEnhancer
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def self.desc # :nodoc:
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"another embedded expression pattern (default '\[= =\]')."
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end
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def initialize(input, properties={})
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self.bipattern = properties[:bipattern] # or '\$\{ \}'
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super
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end
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## when pat is nil then '\[= =\]' is used
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def bipattern=(pat) # :nodoc:
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@bipattern = pat || '\[= =\]'
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pre, post = @bipattern.split()
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@bipattern_regexp = /(.*?)#{pre}(=*)(.*?)#{post}/m
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end
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def add_text(src, text)
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return unless text
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m = nil
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text.scan(@bipattern_regexp) do |txt, indicator, code|
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m = Regexp.last_match
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super(src, txt)
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add_expr(src, code, '=' + indicator)
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end
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#rest = $' || text # ruby1.8
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|
|
rest = m ? text[m.end(0)..-1] : text # ruby1.9
|
||
|
|
super(src, rest)
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
|
||
|
|
|
||
|
|
##
|
||
|
|
## regards lines starting with '%' as program code
|
||
|
|
##
|
||
|
|
## this is for compatibility to eruby and ERB.
|
||
|
|
##
|
||
|
|
## this is language-independent.
|
||
|
|
##
|
||
|
|
module PercentLineEnhancer
|
||
|
|
|
||
|
|
def self.desc # :nodoc:
|
||
|
|
"regard lines starting with '%' as program code"
|
||
|
|
end
|
||
|
|
|
||
|
|
def add_text(src, text)
|
||
|
|
pos = 0
|
||
|
|
text2 = ''
|
||
|
|
text.scan(/^\%(.*?\r?\n)/) do
|
||
|
|
line = $1
|
||
|
|
match = Regexp.last_match
|
||
|
|
len = match.begin(0) - pos
|
||
|
|
str = text[pos, len]
|
||
|
|
pos = match.end(0)
|
||
|
|
if text2.empty?
|
||
|
|
text2 = str
|
||
|
|
else
|
||
|
|
text2 << str
|
||
|
|
end
|
||
|
|
if line[0] == ?%
|
||
|
|
text2 << line
|
||
|
|
else
|
||
|
|
super(src, text2)
|
||
|
|
text2 = ''
|
||
|
|
add_stmt(src, line)
|
||
|
|
end
|
||
|
|
end
|
||
|
|
#rest = pos == 0 ? text : $' # ruby1.8
|
||
|
|
rest = pos == 0 ? text : text[pos..-1] # ruby1.9
|
||
|
|
unless text2.empty?
|
||
|
|
text2 << rest if rest
|
||
|
|
rest = text2
|
||
|
|
end
|
||
|
|
super(src, rest)
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
|
||
|
|
|
||
|
|
##
|
||
|
|
## [experimental] allow header and footer in eRuby script
|
||
|
|
##
|
||
|
|
## ex.
|
||
|
|
## ====================
|
||
|
|
## ## without header and footer
|
||
|
|
## $ cat ex1.eruby
|
||
|
|
## <% def list_items(list) %>
|
||
|
|
## <% for item in list %>
|
||
|
|
## <li><%= item %></li>
|
||
|
|
## <% end %>
|
||
|
|
## <% end %>
|
||
|
|
##
|
||
|
|
## $ erubis -s ex1.eruby
|
||
|
|
## _buf = []; def list_items(list)
|
||
|
|
## ; for item in list
|
||
|
|
## ; _buf << '<li>'; _buf << ( item ).to_s; _buf << '</li>
|
||
|
|
## '; end
|
||
|
|
## ; end
|
||
|
|
## ;
|
||
|
|
## _buf.join
|
||
|
|
##
|
||
|
|
## ## with header and footer
|
||
|
|
## $ cat ex2.eruby
|
||
|
|
## <!--#header:
|
||
|
|
## def list_items(list)
|
||
|
|
## #-->
|
||
|
|
## <% for item in list %>
|
||
|
|
## <li><%= item %></li>
|
||
|
|
## <% end %>
|
||
|
|
## <!--#footer:
|
||
|
|
## end
|
||
|
|
## #-->
|
||
|
|
##
|
||
|
|
## $ erubis -s -c HeaderFooterEruby ex4.eruby
|
||
|
|
##
|
||
|
|
## def list_items(list)
|
||
|
|
## _buf = []; _buf << '
|
||
|
|
## '; for item in list
|
||
|
|
## ; _buf << '<li>'; _buf << ( item ).to_s; _buf << '</li>
|
||
|
|
## '; end
|
||
|
|
## ; _buf << '
|
||
|
|
## ';
|
||
|
|
## _buf.join
|
||
|
|
## end
|
||
|
|
##
|
||
|
|
## ====================
|
||
|
|
##
|
||
|
|
## this is language-independent.
|
||
|
|
##
|
||
|
|
module HeaderFooterEnhancer
|
||
|
|
|
||
|
|
def self.desc # :nodoc:
|
||
|
|
"allow header/footer in document (ex. '<!--#header: #-->')"
|
||
|
|
end
|
||
|
|
|
||
|
|
HEADER_FOOTER_PATTERN = /(.*?)(^[ \t]*)?<!--\#(\w+):(.*?)\#-->([ \t]*\r?\n)?/m
|
||
|
|
|
||
|
|
def add_text(src, text)
|
||
|
|
m = nil
|
||
|
|
text.scan(HEADER_FOOTER_PATTERN) do |txt, lspace, word, content, rspace|
|
||
|
|
m = Regexp.last_match
|
||
|
|
flag_trim = @trim && lspace && rspace
|
||
|
|
super(src, txt)
|
||
|
|
content = "#{lspace}#{content}#{rspace}" if flag_trim
|
||
|
|
super(src, lspace) if !flag_trim && lspace
|
||
|
|
instance_variable_set("@#{word}", content)
|
||
|
|
super(src, rspace) if !flag_trim && rspace
|
||
|
|
end
|
||
|
|
#rest = $' || text # ruby1.8
|
||
|
|
rest = m ? text[m.end(0)..-1] : text # ruby1.9
|
||
|
|
super(src, rest)
|
||
|
|
end
|
||
|
|
|
||
|
|
attr_accessor :header, :footer
|
||
|
|
|
||
|
|
def convert(input)
|
||
|
|
source = super
|
||
|
|
return @src = "#{@header}#{source}#{@footer}"
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
|
||
|
|
|
||
|
|
##
|
||
|
|
## delete indentation of HTML.
|
||
|
|
##
|
||
|
|
## this is language-independent.
|
||
|
|
##
|
||
|
|
module DeleteIndentEnhancer
|
||
|
|
|
||
|
|
def self.desc # :nodoc:
|
||
|
|
"delete indentation of HTML."
|
||
|
|
end
|
||
|
|
|
||
|
|
def convert_input(src, input)
|
||
|
|
input = input.gsub(/^[ \t]+</, '<')
|
||
|
|
super(src, input)
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
|
||
|
|
|
||
|
|
##
|
||
|
|
## convert "<h1><%=title%></h1>" into "_buf << %Q`<h1>#{title}</h1>`"
|
||
|
|
##
|
||
|
|
## this is only for Eruby.
|
||
|
|
##
|
||
|
|
module InterpolationEnhancer
|
||
|
|
|
||
|
|
def self.desc # :nodoc:
|
||
|
|
"convert '<p><%=text%></p>' into '_buf << %Q`<p>\#{text}</p>`'"
|
||
|
|
end
|
||
|
|
|
||
|
|
def convert_input(src, input)
|
||
|
|
pat = @pattern
|
||
|
|
regexp = pat.nil? || pat == '<% %>' ? Basic::Converter::DEFAULT_REGEXP : pattern_regexp(pat)
|
||
|
|
pos = 0
|
||
|
|
is_bol = true # is beginning of line
|
||
|
|
str = ''
|
||
|
|
input.scan(regexp) do |indicator, code, tailch, rspace|
|
||
|
|
match = Regexp.last_match()
|
||
|
|
len = match.begin(0) - pos
|
||
|
|
text = input[pos, len]
|
||
|
|
pos = match.end(0)
|
||
|
|
ch = indicator ? indicator[0] : nil
|
||
|
|
lspace = ch == ?= ? nil : detect_spaces_at_bol(text, is_bol)
|
||
|
|
is_bol = rspace ? true : false
|
||
|
|
_add_text_to_str(str, text)
|
||
|
|
## * when '<%= %>', do nothing
|
||
|
|
## * when '<% %>' or '<%# %>', delete spaces iff only spaces are around '<% %>'
|
||
|
|
if ch == ?= # <%= %>
|
||
|
|
rspace = nil if tailch && !tailch.empty?
|
||
|
|
str << lspace if lspace
|
||
|
|
add_expr(str, code, indicator)
|
||
|
|
str << rspace if rspace
|
||
|
|
elsif ch == ?\# # <%# %>
|
||
|
|
n = code.count("\n") + (rspace ? 1 : 0)
|
||
|
|
if @trim && lspace && rspace
|
||
|
|
add_text(src, str)
|
||
|
|
str = ''
|
||
|
|
add_stmt(src, "\n" * n)
|
||
|
|
else
|
||
|
|
str << lspace if lspace
|
||
|
|
add_text(src, str)
|
||
|
|
str = ''
|
||
|
|
add_stmt(src, "\n" * n)
|
||
|
|
str << rspace if rspace
|
||
|
|
end
|
||
|
|
else # <% %>
|
||
|
|
if @trim && lspace && rspace
|
||
|
|
add_text(src, str)
|
||
|
|
str = ''
|
||
|
|
add_stmt(src, "#{lspace}#{code}#{rspace}")
|
||
|
|
else
|
||
|
|
str << lspace if lspace
|
||
|
|
add_text(src, str)
|
||
|
|
str = ''
|
||
|
|
add_stmt(src, code)
|
||
|
|
str << rspace if rspace
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
#rest = $' || input # ruby1.8
|
||
|
|
rest = pos == 0 ? input : input[pos..-1] # ruby1.9
|
||
|
|
_add_text_to_str(str, rest)
|
||
|
|
add_text(src, str)
|
||
|
|
end
|
||
|
|
|
||
|
|
def add_text(src, text)
|
||
|
|
return if !text || text.empty?
|
||
|
|
#src << " _buf << %Q`" << text << "`;"
|
||
|
|
if text[-1] == ?\n
|
||
|
|
text[-1] = "\\n"
|
||
|
|
src << " _buf << %Q`" << text << "`\n"
|
||
|
|
else
|
||
|
|
src << " _buf << %Q`" << text << "`;"
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
def _add_text_to_str(str, text)
|
||
|
|
return if !text || text.empty?
|
||
|
|
text.gsub!(/['\#\\]/, '\\\\\&')
|
||
|
|
str << text
|
||
|
|
end
|
||
|
|
|
||
|
|
def add_expr_escaped(str, code)
|
||
|
|
str << "\#{#{escaped_expr(code)}}"
|
||
|
|
end
|
||
|
|
|
||
|
|
def add_expr_literal(str, code)
|
||
|
|
str << "\#{#{code}}"
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
|
||
|
|
|
||
|
|
end
|