[ruby/rdoc] Relative loading for easier development (https://github.com/ruby/rdoc/pull/821)

This patch makes sure we only load relative code. Hence when coding or
testing rdoc, we'll be sure to always be using the correct code.

Discussion started at https://github.com/ruby/rdoc/pull/817.

Signed-off-by: Ulysse Buonomo <buonomo.ulysse@gmail.com>

https://github.com/ruby/rdoc/commit/aa41bd48eb

Co-authored-by: Nobuyoshi Nakada <nobu@ruby-lang.org>

1 files changed, 28 insertions, 12 deletions

diff --git a/lib/rdoc/markdown.rb b/lib/rdoc/markdown.rb
index c10ad2fb14..25a7217d3c 100644
--- a/lib/rdoc/markdown.rb
+++ b/lib/rdoc/markdown.rb
@@ -199,6 +199,7 @@ class RDoc::Markdown
       @result = nil
       @failed_rule = nil
       @failing_rule_offset = -1
+      @line_offsets = nil
 
       setup_foreign_grammar
     end
@@ -215,17 +216,32 @@ class RDoc::Markdown
       target + 1
     end
 
-    def current_line(target=pos)
-      cur_offset = 0
-      cur_line = 0
+    if [].respond_to? :bsearch_index
+      def current_line(target=pos)
+        unless @line_offsets
+          @line_offsets = []
+          total = 0
+          string.each_line do |line|
+            total += line.size
+            @line_offsets << total
+          end
+        end
 
-      string.each_line do |line|
-        cur_line += 1
-        cur_offset += line.size
-        return cur_line if cur_offset >= target
+        @line_offsets.bsearch_index {|x| x >= target } + 1 || -1
       end
+    else
+      def current_line(target=pos)
+        cur_offset = 0
+        cur_line = 0
+
+        string.each_line do |line|
+          cur_line += 1
+          cur_offset += line.size
+          return cur_line if cur_offset >= target
+        end
 
-      -1
+        -1
+      end
     end
 
     def lines
@@ -533,11 +549,11 @@ class RDoc::Markdown
 
 
 
-  require 'rdoc'
-  require 'rdoc/markup/to_joined_paragraph'
-  require 'rdoc/markdown/entities'
+  require_relative '../rdoc'
+  require_relative 'markup/to_joined_paragraph'
+  require_relative 'markdown/entities'
 
-  require 'rdoc/markdown/literals'
+  require_relative 'markdown/literals'
 
   ##
   # Supported extensions