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