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|
module CodeRay
module Encoders
class HTML
# This module is included in the output String from thew 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: more doc.
module Output
require 'coderay/encoders/html/numerization.rb'
attr_accessor :css
class << self
# This makes Output look like a class.
#
# Example:
#
# a = Output.new '<span class="co">Code</span>'
# a.wrap! :page
def new string, css = CSS.new, element = nil
output = string.clone.extend self
output.wrapped_in = element
output.css = css
output
end
# 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
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
sheet = css.stylesheet
sheet = <<-CSS if in_tag
<style type="text/css">
#{sheet}
</style>
CSS
sheet
end
def page_template_for_css css
sheet = make_stylesheet css
PAGE.apply 'CSS', sheet
end
# Define a new wrapper. This is meta programming.
def wrapper *wrappers
wrappers.each do |wrapper|
define_method wrapper do |*args|
wrap wrapper, *args
end
define_method "#{wrapper}!".to_sym do |*args|
wrap! wrapper, *args
end
end
end
end
wrapper :div, :span, :page
def wrapped_in? element
wrapped_in == element
end
def wrapped_in
@wrapped_in ||= nil
end
attr_writer :wrapped_in
def wrap_in template
clone.wrap_in! template
end
def wrap_in! template
Template.wrap! self, template, 'CONTENT'
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)
when nil
return self
else
raise "Unknown value %p for :wrap" % element
end
@wrapped_in = element
self
end
def wrap *args
clone.wrap!(*args)
end
def stylesheet in_tag = false
Output.make_stylesheet @css, in_tag
end
class Template < String
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
module Simple
def ` str #` <-- for stupid editors
Template.new str
end
end
end
extend Template::Simple
#-- don't include the templates in docu
SPAN = `<span class="CodeRay"><%CONTENT%></span>`
DIV = <<-`DIV`
<div class="CodeRay">
<div class="code"><pre><%CONTENT%></pre></div>
</div>
DIV
TABLE = <<-`TABLE`
<table class="CodeRay"><tr>
<td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre><%LINE_NUMBERS%></pre></td>
<td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }"><%CONTENT%></pre></td>
</tr></table>
TABLE
# title="double click to expand"
LIST = <<-`LIST`
<ol class="CodeRay"><%CONTENT%></ol>
LIST
PAGE = <<-`PAGE`
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="de">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>CodeRay HTML Encoder Example</title>
<style type="text/css">
<%CSS%>
</style>
</head>
<body style="background-color: white;">
<%CONTENT%>
</body>
</html>
PAGE
end
end
end
end
|
