module CodeRay
module Encoders
class HTML
# This module is included in the output String of the HTML Encoder.
#
# It provides methods like wrap, div, page etc.
#
# Remember to use #clone instead of #dup to keep the modules the object was
# extended with.
#
# TODO: Rewrite this without monkey patching.
module Output
attr_accessor :css
class << self
# Raises an exception if an object that doesn't respond to to_str is extended by Output,
# to prevent users from misuse. Use Module#remove_method to disable.
def extended o # :nodoc:
warn "The Output module is intended to extend instances of String, not #{o.class}." unless o.respond_to? :to_str
end
def make_stylesheet css, in_tag = false # :nodoc:
sheet = css.stylesheet
sheet = <<-'CSS' if in_tag
CSS
sheet
end
def page_template_for_css css # :nodoc:
sheet = make_stylesheet css
PAGE.apply 'CSS', sheet
end
end
def wrapped_in? element
wrapped_in == element
end
def wrapped_in
@wrapped_in ||= nil
end
attr_writer :wrapped_in
def wrap_in! template
Template.wrap! self, template, 'CONTENT'
self
end
def apply_title! title
self.sub!(/()(<\/title>)/) { $1 + title + $2 }
self
end
def wrap! element, *args
return self if not element or element == wrapped_in
case element
when :div
raise "Can't wrap %p in %p" % [wrapped_in, element] unless wrapped_in? nil
wrap_in! DIV
when :span
raise "Can't wrap %p in %p" % [wrapped_in, element] unless wrapped_in? nil
wrap_in! SPAN
when :page
wrap! :div if wrapped_in? nil
raise "Can't wrap %p in %p" % [wrapped_in, element] unless wrapped_in? :div
wrap_in! Output.page_template_for_css(@css)
if args.first.is_a?(Hash) && title = args.first[:title]
apply_title! title
end
self
else
raise "Unknown value %p for :wrap" % element
end
@wrapped_in = element
self
end
def stylesheet in_tag = false
Output.make_stylesheet @css, in_tag
end
#-- don't include the templates in docu
class Template < String # :nodoc:
def self.wrap! str, template, target
target = Regexp.new(Regexp.escape("<%#{target}%>"))
if template =~ target
str[0,0] = $`
str << $'
else
raise "Template target <%%%p%%> not found" % target
end
end
def apply target, replacement
target = Regexp.new(Regexp.escape("<%#{target}%>"))
if self =~ target
Template.new($` + replacement + $')
else
raise "Template target <%%%p%%> not found" % target
end
end
end
SPAN = Template.new '<span class="CodeRay"><%CONTENT%></span>'
DIV = Template.new <<-DIV
<div class="CodeRay">
<div class="code"><pre><%CONTENT%></pre></div>
</div>
DIV
TABLE = Template.new <<-TABLE
<table class="CodeRay"><tr>
<td class="line-numbers"><pre><%LINE_NUMBERS%></pre></td>
<td class="code"><pre><%CONTENT%></pre></td>
</tr></table>
TABLE
PAGE = Template.new <<-PAGE
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>
<%CONTENT%>