added tag v1_9_0_4

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 75 insertions, 0 deletions

diff --git a/trunk/lib/rdoc/markup/preprocess.rb b/trunk/lib/rdoc/markup/preprocess.rb
new file mode 100644
index 0000000000..00dd4be4ad
--- /dev/null
+++ b/trunk/lib/rdoc/markup/preprocess.rb
@@ -0,0 +1,75 @@
+require 'rdoc/markup'
+
+##
+# Handle common directives that can occur in a block of text:
+#
+# : include : filename
+
+class RDoc::Markup::PreProcess
+
+  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
+
+  private
+
+  ##
+  # Include a file, indenting it correctly.
+
+  def include_file(name, indent)
+    if full_name = find_include_file(name) then
+      content = File.open(full_name) {|f| f.read}
+      # strip leading '#'s, but only if all lines start with them
+      if content =~ /^[^#]/
+        content.gsub(/^/, indent)
+      else
+        content.gsub(/^#?/, indent)
+      end
+    else
+      $stderr.puts "Couldn't find file to include: '#{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
+