# -*- coding: us-ascii -*-

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# = ERB -- Ruby Templating

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#

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# Author:: Masatoshi SEKI

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# Documentation:: James Edward Gray II, Gavin Sinclair, and Simon Chiang

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#

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# See ERB for primary documentation and ERB::Util for a couple of utility

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# routines.

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#

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# Copyright (c) 1999-2000,2002,2003 Masatoshi SEKI

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#

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# You can redistribute it and/or modify it under the same terms as Ruby.

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require "cgi/util"

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#

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# = ERB -- Ruby Templating

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#

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# == Introduction

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#

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# ERB provides an easy to use but powerful templating system for Ruby. Using

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# ERB, actual Ruby code can be added to any plain text document for the

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# purposes of generating document information details and/or flow control.

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#

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# A very simple example is this:

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#

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# require 'erb'

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#

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# x = 42

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# template = ERB.new <<-EOF

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# The value of x is: <%= x %>

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# EOF

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# puts template.result(binding)

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#

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# <em>Prints:</em> The value of x is: 42

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#

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# More complex examples are given below.

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#

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#

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# == Recognized Tags

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#

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# ERB recognizes certain tags in the provided template and converts them based

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# on the rules below:

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#

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# <% Ruby code -- inline with output %>

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# <%= Ruby expression -- replace with result %>

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# <%# comment -- ignored -- useful in testing %>

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# % a line of Ruby code -- treated as <% line %> (optional -- see ERB.new)

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# %% replaced with % if first thing on a line and % processing is used

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# <%% or %%> -- replace with <% or %> respectively

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#

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# All other text is passed through ERB filtering unchanged.

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#

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#

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# == Options

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#

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# There are several settings you can change when you use ERB:

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# * the nature of the tags that are recognized;

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# * the value of <tt>$SAFE</tt> under which the template is run;

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# * the binding used to resolve local variables in the template.

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#

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# See the ERB.new and ERB#result methods for more detail.

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#

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# == Character encodings

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#

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# ERB (or Ruby code generated by ERB) returns a string in the same

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# character encoding as the input string. When the input string has

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# a magic comment, however, it returns a string in the encoding specified

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# by the magic comment.

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#

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# # -*- coding: utf-8 -*-

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# require 'erb'

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#

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# template = ERB.new <<EOF

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# <%#-*- coding: Big5 -*-%>

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# \_\_ENCODING\_\_ is <%= \_\_ENCODING\_\_ %>.

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# EOF

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# puts template.result

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#

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# <em>Prints:</em> \_\_ENCODING\_\_ is Big5.

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#

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#

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# == Examples

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#

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# === Plain Text

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#

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# ERB is useful for any generic templating situation. Note that in this example, we use the

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# convenient "% at start of line" tag, and we quote the template literally with

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# <tt>%q{...}</tt> to avoid trouble with the backslash.

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#

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# require "erb"

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#

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# # Create template.

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# template = %q{

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# From: James Edward Gray II <james@grayproductions.net>

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# To: <%= to %>

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# Subject: Addressing Needs

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#

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# <%= to[/\w+/] %>:

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#

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# Just wanted to send a quick note assuring that your needs are being

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# addressed.

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#

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# I want you to know that my team will keep working on the issues,

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# especially:

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#

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# <%# ignore numerous minor requests -- focus on priorities %>

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# % priorities.each do |priority|

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# * <%= priority %>

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# % end

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#

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# Thanks for your patience.

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#

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# James Edward Gray II

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# }.gsub(/^ /, '')

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#

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# message = ERB.new(template, 0, "%<>")

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#

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# # Set up template data.

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# to = "Community Spokesman <spokesman@ruby_community.org>"

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# priorities = [ "Run Ruby Quiz",

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# "Document Modules",

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# "Answer Questions on Ruby Talk" ]

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#

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# # Produce result.

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# email = message.result

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# puts email

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#

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# <i>Generates:</i>

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#

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# From: James Edward Gray II <james@grayproductions.net>

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# To: Community Spokesman <spokesman@ruby_community.org>

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# Subject: Addressing Needs

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#

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# Community:

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#

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# Just wanted to send a quick note assuring that your needs are being addressed.

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#

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# I want you to know that my team will keep working on the issues, especially:

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#

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# * Run Ruby Quiz

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# * Document Modules

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# * Answer Questions on Ruby Talk

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#

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# Thanks for your patience.

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#

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# James Edward Gray II

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#

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# === Ruby in HTML

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#

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# ERB is often used in <tt>.rhtml</tt> files (HTML with embedded Ruby). Notice the need in

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# this example to provide a special binding when the template is run, so that the instance

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# variables in the Product object can be resolved.

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#

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# require "erb"

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#

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# # Build template data class.

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# class Product

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# def initialize( code, name, desc, cost )

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# @code = code

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# @name = name

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# @desc = desc

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# @cost = cost

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#

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# @features = [ ]

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# end

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#

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# def add_feature( feature )

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# @features << feature

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# end

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#

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# # Support templating of member data.

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# def get_binding

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# binding

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# end

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#

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# # ...

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# end

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#

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# # Create template.

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# template = %{

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# <html>

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# <head><title>Ruby Toys -- <%= @name %></title></head>

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# <body>

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#

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# <h1><%= @name %> (<%= @code %>)</h1>

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# <p><%= @desc %></p>

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#

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# <ul>

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# <% @features.each do |f| %>

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# <li><b><%= f %></b></li>

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# <% end %>

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# </ul>

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#

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# <p>

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# <% if @cost < 10 %>

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# <b>Only <%= @cost %>!!!</b>

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# <% else %>

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# Call for a price, today!

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# <% end %>

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# </p>

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#

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# </body>

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# </html>

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# }.gsub(/^ /, '')

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#

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# rhtml = ERB.new(template)

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#

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# # Set up template data.

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# toy = Product.new( "TZ-1002",

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# "Rubysapien",

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# "Geek's Best Friend! Responds to Ruby commands...",

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# 999.95 )

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# toy.add_feature("Listens for verbal commands in the Ruby language!")

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# toy.add_feature("Ignores Perl, Java, and all C variants.")

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# toy.add_feature("Karate-Chop Action!!!")

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# toy.add_feature("Matz signature on left leg.")

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# toy.add_feature("Gem studded eyes... Rubies, of course!")

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#

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# # Produce result.

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# rhtml.run(toy.get_binding)

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#

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# <i>Generates (some blank lines removed):</i>

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#

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# <html>

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# <head><title>Ruby Toys -- Rubysapien</title></head>

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# <body>

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#

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# <h1>Rubysapien (TZ-1002)</h1>

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# <p>Geek's Best Friend! Responds to Ruby commands...</p>

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#

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# <ul>

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# <li><b>Listens for verbal commands in the Ruby language!</b></li>

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# <li><b>Ignores Perl, Java, and all C variants.</b></li>

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# <li><b>Karate-Chop Action!!!</b></li>

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# <li><b>Matz signature on left leg.</b></li>

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# <li><b>Gem studded eyes... Rubies, of course!</b></li>

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# </ul>

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#

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# <p>

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# Call for a price, today!

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# </p>

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#

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# </body>

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# </html>

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#

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#

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# == Notes

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#

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# There are a variety of templating solutions available in various Ruby projects:

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# * ERB's big brother, eRuby, works the same but is written in C for speed;

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# * Amrita (smart at producing HTML/XML);

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# * cs/Template (written in C for speed);

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# * RDoc, distributed with Ruby, uses its own template engine, which can be reused elsewhere;

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# * and others; search {RubyGems.org}[https://rubygems.org/] or

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# {The Ruby Toolbox}[https://www.ruby-toolbox.com/].

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#

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# Rails, the web application framework, uses ERB to create views.

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#

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class ERB

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Revision = '$Date:: 2014-12-12 19:48:57 +0900#$' # :nodoc: #'

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# Returns revision information for the erb.rb module.

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def self.version

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"erb.rb [2.1.0 #{ERB::Revision.split[1]}]"

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end

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end

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#--

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# ERB::Compiler

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class ERB

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# = ERB::Compiler

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#

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# Compiles ERB templates into Ruby code; the compiled code produces the

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# template result when evaluated. ERB::Compiler provides hooks to define how

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# generated output is handled.

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#

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# Internally ERB does something like this to generate the code returned by

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# ERB#src:

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#

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# compiler = ERB::Compiler.new('<>')

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# compiler.pre_cmd = ["_erbout=''"]

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# compiler.put_cmd = "_erbout.concat"

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# compiler.insert_cmd = "_erbout.concat"

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# compiler.post_cmd = ["_erbout"]

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#

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# code, enc = compiler.compile("Got <%= obj %>!\n")

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# puts code

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#

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# <i>Generates</i>:

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#

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# #coding:UTF-8

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# _erbout=''; _erbout.concat "Got "; _erbout.concat(( obj ).to_s); _erbout.concat "!\n"; _erbout

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#

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# By default the output is sent to the print method. For example:

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#

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# compiler = ERB::Compiler.new('<>')

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# code, enc = compiler.compile("Got <%= obj %>!\n")

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# puts code

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#

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# <i>Generates</i>:

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#

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# #coding:UTF-8

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# print "Got "; print(( obj ).to_s); print "!\n"

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#

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# == Evaluation

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#

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# The compiled code can be used in any context where the names in the code

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# correctly resolve. Using the last example, each of these print 'Got It!'

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#

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# Evaluate using a variable:

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#

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# obj = 'It'

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# eval code

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#

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# Evaluate using an input:

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#

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# mod = Module.new

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# mod.module_eval %{

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# def get(obj)

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# #{code}

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# end

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# }

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# extend mod

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# get('It')

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#

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# Evaluate using an accessor:

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#

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# klass = Class.new Object

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# klass.class_eval %{

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# attr_accessor :obj

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# def initialize(obj)

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# @obj = obj

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# end

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# def get_it

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# #{code}

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# end

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# }

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# klass.new('It').get_it

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#

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# Good! See also ERB#def_method, ERB#def_module, and ERB#def_class.

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class Compiler # :nodoc:

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class PercentLine # :nodoc:

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def initialize(str)

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@value = str

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end

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attr_reader :value

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alias :to_s :value

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def empty?

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@value.empty?

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end

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end

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class Scanner # :nodoc:

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@scanner_map = {}

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def self.regist_scanner(klass, trim_mode, percent)

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@scanner_map[[trim_mode, percent]] = klass

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end

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def self.default_scanner=(klass)

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@default_scanner = klass

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end

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def self.make_scanner(src, trim_mode, percent)

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klass = @scanner_map.fetch([trim_mode, percent], @default_scanner)

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klass.new(src, trim_mode, percent)

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end

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def initialize(src, trim_mode, percent)

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@src = src

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@stag = nil

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end

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attr_accessor :stag

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def scan; end

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end

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class TrimScanner < Scanner # :nodoc:

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def initialize(src, trim_mode, percent)

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super

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@trim_mode = trim_mode

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@percent = percent

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if @trim_mode == '>'

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@scan_line = self.method(:trim_line1)

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elsif @trim_mode == '<>'

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@scan_line = self.method(:trim_line2)

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elsif @trim_mode == '-'

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@scan_line = self.method(:explicit_trim_line)

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else

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@scan_line = self.method(:scan_line)

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end

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end

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attr_accessor :stag

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def scan(&block)

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@stag = nil

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if @percent

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@src.each_line do |line|

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percent_line(line, &block)

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end

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else

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@scan_line.call(@src, &block)

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end

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nil

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end

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def percent_line(line, &block)

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if @stag || line[0] != ?%

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return @scan_line.call(line, &block)

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end

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line[0] = ''

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if line[0] == ?%

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@scan_line.call(line, &block)

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else

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yield(PercentLine.new(line.chomp))

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end

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end

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def scan_line(line)

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line.scan(/(.*?)(<%%|%%>|<%=|<%#|<%|%>|\n|\z)/m) do |tokens|

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tokens.each do |token|

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next if token.empty?

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yield(token)

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end

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end

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end

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def trim_line1(line)

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line.scan(/(.*?)(<%%|%%>|<%=|<%#|<%|%>\n|%>|\n|\z)/m) do |tokens|

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tokens.each do |token|

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next if token.empty?

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if token == "%>\n"

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yield('%>')

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yield(:cr)

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else

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yield(token)

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end

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end

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end

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end

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def trim_line2(line)

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head = nil

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line.scan(/(.*?)(<%%|%%>|<%=|<%#|<%|%>\n|%>|\n|\z)/m) do |tokens|

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tokens.each do |token|

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next if token.empty?

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head = token unless head

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if token == "%>\n"

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yield('%>')

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if is_erb_stag?(head)

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yield(:cr)

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else

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yield("\n")

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end

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head = nil

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else

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yield(token)

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head = nil if token == "\n"

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end

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end

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end

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end

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def explicit_trim_line(line)

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line.scan(/(.*?)(^[ \t]*<%\-|<%\-|<%%|%%>|<%=|<%#|<%|-%>\n|-%>|%>|\z)/m) do |tokens|

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tokens.each do |token|

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next if token.empty?

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if @stag.nil? && /[ \t]*<%-/ =~ token

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yield('<%')

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elsif @stag && token == "-%>\n"

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yield('%>')

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yield(:cr)

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elsif @stag && token == '-%>'

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yield('%>')

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else

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yield(token)

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end

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end

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end

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end

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ERB_STAG = %w(<%= <%# <%)

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def is_erb_stag?(s)

[484] Fix | Delete

ERB_STAG.member?(s)

[485] Fix | Delete

end

[486] Fix | Delete

end

[487] Fix | Delete

[488] Fix | Delete

Scanner.default_scanner = TrimScanner

[489] Fix | Delete

[490] Fix | Delete

class SimpleScanner < Scanner # :nodoc:

[491] Fix | Delete

def scan

[492] Fix | Delete

@src.scan(/(.*?)(<%%|%%>|<%=|<%#|<%|%>|\n|\z)/m) do |tokens|

[493] Fix | Delete

tokens.each do |token|

[494] Fix | Delete

next if token.empty?

[495] Fix | Delete

yield(token)

[496] Fix | Delete

end

[497] Fix | Delete

end

[498] Fix | Delete

end

[499] Fix | Delete