/usr/lib/ruby/vendor_ruby/ramaze/view/liquid.rb is in ruby-ramaze 2012.12.08-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 | # Copyright (c) 2009 Michael Fellinger m.fellinger@gmail.com
# All files in this distribution are subject to the terms of the MIT license.
require 'liquid'
module Ramaze
module View
# Liquid is a smarty-style templating engine that restricts the usage of
# code inside templates. This is mostly helpful if you want to let users
# submit templates but prevent them from running arbitrary code.
#
# Liquid offers a pipe-like syntax for chaining operations on objects.
# Any instance variable from your Controller is available as a variable
# inside Liquid, so be sensitive about what data you provide.
#
# If you want to allow partials you can provide a kind of virtual
# filesystem that contains partials. These can be rendered using the
# Liquid `{% include 'name' %}` tag. The include tag has no relation to the
# Ramaze::Helper::Render, it simply inlines the file.
#
# To tell Liquid where to find partials, you have to set the file_system.
# The naming-convention for liquid-partials is to use a '_' prefix to the
# filename and the '.liquid' filename extension. The names of partials
# are restricted to ASCII alpha-numeric characters and underscores. You
# can also use '/' to use templates located in deeper directories.
# The partial has access to the same variables as the template including
# it.
#
# @example setting file_system
# template_path = './partials/'
# Liquid::Template.file_system = Liquid::LocalFileSystem.new(template_path)
#
# @example using include
# {% include 'foo' %}
# {% include 'bar/foo' %}
#
# This will include the files located at './partials/_foo.liquid' and
# './partials/bar/_foo.liquid'.
#
# This functionality gets even more interesting if you customize it with
# your own virtual file-system, you can use anything that responds to
# `#read_template_file(path)`.
# That way you can even fetch templates from a database or instruct Liquid
# to allow you access to your own templates in the '/views' directory.
module Liquid
# Liquid requires the variable keys to be strings, most likely for
# security resons (don't allow arbitrary symbols).
def self.call(action, string)
action.sync_variables(action)
variables = {}
action.variables.each{|k,v| variables[k.to_s] = v }
liquid = View.compile(string){|s| ::Liquid::Template.parse(s) }
html = liquid.render(variables)
return html, 'text/html'
end
class Tag < ::Liquid::Tag
def initialize(tag_name, arg, tokens)
super
@arg = arg.strip
end
end
# Liquid has intentionally? no support for binding, in order to use
# helpers you have to register them as tags.
#
# Creating a tag needs boilerplate, so we reduce that for your
# convenience.
#
# This is not the most performant way, it seems like Liquid uses
# initialize to compile templates and gives you the chance to process the
# arguments to the tag only once, but if you want that please contribute.
#
# Further below are a couple of tags that map to the most common helpers,
# this also needs contribution as I simply don't have the time to write
# all of that and invent a consistent syntax.
def self.register_tag(name, helper, &block)
klass = Class.new(Tag)
klass.send(:include, helper)
klass.send(:define_method, :render, &block)
::Liquid::Template.register_tag(name, klass)
end
# {% route index %}
register_tag('route', Ramaze::Helper::Link) do |context|
Ramaze::Current.action.node.route(@arg)
end
# {% anchor "The index" index %}
register_tag('anchor', Ramaze::Helper::Link) do |context|
@arg =~ /^(['"])(.*?)\1\s+(.*)/
Ramaze::Current.action.node.anchor($2, $3)
end
end # Liquid
end # View
end # Ramaze
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