Adds a "depth" option to the child_pages macro (#10789).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@10401 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/plugins/acts_as_tree/lib/active_record/acts/tree.rb

@@ -73,15 +73,20 @@ module ActiveRecord
         # Returns list of descendants.
         #
         #   root.descendants # => [child1, subchild1, subchild2]
-        def descendants
-          children + children.collect(&:descendants).flatten
+        def descendants(depth=nil)
+          depth ||= 0
+          result = children.dup
+          unless depth == 1
+            result += children.collect {|child| child.descendants(depth-1)}.flatten
+          end
+          result
         end
 
         # Returns list of descendants and a reference to the current node.
         #
         #   root.self_and_descendants # => [root, child1, subchild1, subchild2]
-        def self_and_descendants
-          [self] + descendants
+        def self_and_descendants(depth=nil)
+          [self] + descendants(depth)
         end
 
         # Returns the root node of the tree.

lib/redmine/wiki_formatting/macros.rb

@@ -183,7 +183,9 @@ module Redmine
              "  !{{child_pages(Foo)}} -- lists all children of page Foo\n" +
              "  !{{child_pages(Foo, parent=1)}} -- same as above with a link to page Foo"
       macro :child_pages do |obj, args|
-        args, options = extract_macro_options(args, :parent)
+        args, options = extract_macro_options(args, :parent, :depth)
+        options[:depth] = options[:depth].to_i if options[:depth].present?
+
         page = nil
         if args.size > 0
           page = Wiki.find_page(args.first.to_s, :project => @project)
@@ -193,7 +195,7 @@ module Redmine
           raise 'With no argument, this macro can be called from wiki pages only.'
         end
         raise 'Page not found' if page.nil? || !User.current.allowed_to?(:view_wiki_pages, page.wiki.project)
-        pages = ([page] + page.descendants).group_by(&:parent_id)
+        pages = page.self_and_descendants(options[:depth]).group_by(&:parent_id)
         render_page_hierarchy(pages, options[:parent] ? page.parent_id : page.id)
       end