add table footer support

README.md

@@ -44,6 +44,8 @@ To use table placeholders, you should create a Table in your document and give i
 
 If you inform `header: true`, the first row will be treated as a *header* and left untouched. The remaining rows will be used as the template for the table.
 
+If you inform `footer: true`, the last row will be treated as a *footer* and left untouched. The remaining rows will be used as the template for the table.
+
 If you have more than one template row, they will be cycled. This is usefull for making zebra tables.
 
 As with **Field placeholders**, just insert a `[FIELD_NAME]` in each cell and let the magic takes place.
@@ -56,7 +58,7 @@ report = ODFReport::Report.new("Users/john/my_template.odt") do |r|
   r.add_field "USER_NAME", @user.nome
   r.add_field "ADDRESS", @user.address
 
-  r.add_table("TABLE_1", @list_of_items, :header=>true) do |t|
+  r.add_table("TABLE_1", @list_of_items, :header=>true, :footer=>true) do |t|
     t.add_column(:item_id, :id)
     t.add_column(:description) { |item| "==> #{item.description}" }
   end

lib/odf-report/report.rb

@@ -30,7 +30,11 @@ def add_text(field_tag, value='')
   end
 
   def add_table(table_name, collection, opts={})
-    opts.merge!(:name => table_name, :collection => collection)
+    opts.merge!(
+      :name => table_name,
+      :collection => collection,
+      :parent_fields => @fields
+    )
     tab = Table.new(opts)
     @tables << tab
 

lib/odf-report/table.rb

@@ -4,9 +4,11 @@ class Table < Nestable
     def initialize(opts)
       super(opts)
 
-      @template_rows = []
+      @template_rows    = []
       @header           = opts[:header] || false
       @skip_if_empty    = opts[:skip_if_empty] || false
+      @parent_fields    = opts[:parent_fields]
+      @footer           = opts[:footer] || false
     end
 
     def replace!(doc)
@@ -16,6 +18,8 @@ def replace!(doc)
 
       @header = table.xpath("table:table-header-rows").empty? ? @header : false
 
+      @footer = ((@header && template_length > 2) || (!@header && template_length > 1)) ? @footer : false
+
       if @skip_if_empty && @data_source.empty?
         table.remove
         return
@@ -35,6 +39,12 @@ def replace!(doc)
 
       end
 
+      if @footer
+        node = get_footer_row
+        @parent_fields.each { |f| f.replace!(node) }
+        table.add_child(node)
+      end
+
       @template_rows.each_with_index do |r, i|
         r.remove if (get_start_node..template_length) === i
       end
@@ -52,7 +62,7 @@ def get_next_row
         @row_cursor = get_start_node unless defined?(@row_cursor)
 
         ret = @template_rows[@row_cursor]
-        if @template_rows.size == @row_cursor + 1
+        if @template_rows.size == @row_cursor + (@footer ? 2 : 1)
           @row_cursor = get_start_node
         else
           @row_cursor += 1
@@ -78,5 +88,8 @@ def deep_clone(node)
       Nokogiri::XML(wrap_with_ns(node)).at_xpath("//table:table-row")
     end
 
+    def get_footer_row
+      @template_rows.last.dup
+    end
   end
 end