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require 'rdoc/markup'
##
# Handle common directives that can occur in a block of text:
#
# : include : filename
class RDoc::Markup::PreProcess
##
# Creates a new pre-processor for +input_file_name+ that will look for
# included files in +include_path+
def initialize(input_file_name, include_path)
@input_file_name = input_file_name
@include_path = include_path
end
##
# Look for common options in a chunk of text. Options that we don't handle
# are yielded to the caller.
def handle(text)
text.gsub!(/^([ \t]*#?[ \t]*):(\w+):([ \t]*)(.+)?\n/) do
next $& if $3.empty? and $4 and $4[0, 1] == ':'
prefix = $1
directive = $2.downcase
param = $4
case directive
when 'include' then
filename = param.split[0]
include_file filename, prefix
else
result = yield directive, param
result = "#{prefix}:#{directive}: #{param}\n" unless result
result
end
end
end
##
# Include a file, indenting it correctly.
def include_file(name, indent)
if full_name = find_include_file(name) then
content = File.binread full_name
content = content.sub(/\A# .*coding[=:].*$/, '').lstrip
# strip leading '#'s, but only if all lines start with them
if content =~ /^[^#]/ then
content.gsub(/^/, indent)
else
content.gsub(/^#?/, indent)
end
else
warn "Couldn't find file to include '#{name}' from #{@input_file_name}"
''
end
end
##
# Look for the given file in the directory containing the current file,
# and then in each of the directories specified in the RDOC_INCLUDE path
def find_include_file(name)
to_search = [File.dirname(@input_file_name)].concat @include_path
to_search.each do |dir|
full_name = File.join(dir, name)
stat = File.stat(full_name) rescue next
return full_name if stat.readable?
end
nil
end
end
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