Completed first run of auto_filter filter_columns and value based fil…

…ters.

This is not ready for release - needs more testing and docs!

lib/axlsx.rb

@@ -65,6 +65,7 @@ def self.coder
   # returns the x, y position of a cell
   def self.name_to_indices(name)
     raise ArgumentError, 'invalid cell name' unless name.size > 1
+    # capitalization?!?
     v = name[/[A-Z]+/].reverse.chars.reduce({:base=>1, :i=>0}) do  |val, c|
       val[:i] += ((c.bytes.first - 64) * val[:base]); val[:base] *= 26; val
     end

lib/axlsx/workbook/workbook.rb

@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 module Axlsx
+require 'axlsx/workbook/worksheet/sheet_calc_pr.rb'
 require 'axlsx/workbook/worksheet/auto_filter/auto_filter.rb'
 require 'axlsx/workbook/worksheet/date_time_converter.rb'
 require 'axlsx/workbook/worksheet/protected_range.rb'

lib/axlsx/workbook/worksheet/auto_filter/auto_filter.rb

@@ -47,6 +47,22 @@ def add_column(col_id, filter_type, options = {})
       columns.last
     end
 
+    # actually performs the filtering of rows who's cells do not 
+    # match the filter.  
+    def apply
+      first_cell, last_cell = range.split(':')
+      start_point = Axlsx::name_to_indices(first_cell)
+      end_point = Axlsx::name_to_indices(last_cell)
+      # The +1 is so we skip the header row with the filter drop downs
+      rows = worksheet.rows[(start_point.last+1)..end_point.last]
+      column_offset = start_point.first
+      columns.each do |column|
+        rows.each do |row|
+          next if row.hidden
+          column.apply(row, column_offset)
+        end
+      end
+    end
     # serialize the object
     # @return [String]
     def to_xml_string(str='')

lib/axlsx/workbook/worksheet/auto_filter/filter_column.rb

@@ -58,6 +58,12 @@ def col_id=(column_index)
       @col_id = column_index
     end
 
+    # Apply the filters for this column
+    # @param [Array] row A row from a worksheet that needs to be
+    # filtered.
+    def apply(row, offset)
+       row.hidden = @filter.apply(row.cells[offset+col_id.to_i])
+    end
     # @param [Boolean] hidden Flag indicating whether the AutoFilter button for this column is hidden.
     # @return [Boolean]
     def hidden_button=(hidden)

lib/axlsx/workbook/worksheet/auto_filter/filters.rb

@@ -33,6 +33,19 @@ def initialize(options={})
     # even when those dates are not using the same calendar system / date formatting.
     attr_reader :calendar_type
 
+    # Tells us if the row of the cell provided should be filterd as it
+    # does not meet any of the specified filter_items or
+    # date_group_items restrictions.
+    # @param [Cell] cell The cell to test against items
+    # TODO implement this for date filters as well!
+    def apply(cell)
+      return false unless cell
+      filter_items.each do |filter|
+        return false if cell.value == filter.val
+      end
+      true
+    end
+
     # The filter values in this filters object
     def filter_items
       @filter_items ||= []

lib/axlsx/workbook/worksheet/sheet_calc_pr.rb

@@ -0,0 +1,13 @@
+module Axlsx
+
+  class SheetCalcPr
+
+    def initialize
+
+    end
+
+    def to_xml_string(str='')
+      str << '<sheetCalcPr fullCalcOnLoad="1"/>'
+    end
+  end
+end

lib/axlsx/workbook/worksheet/sheet_pr.rb

@@ -112,7 +112,7 @@ def update_properties
       page_setup_pr.fit_to_page = worksheet.fit_to_page?
       if worksheet.auto_filter.columns.size > 0
         self.filter_mode = 1
-        self.enable_format_conditions_calculation = 0
+        self.enable_format_conditions_calculation = 1
       end
     end
   end

lib/axlsx/workbook/worksheet/worksheet.rb

@@ -43,6 +43,9 @@ def name
       @name ||=  "Sheet" + (index+1).to_s
     end
 
+    def sheet_calc_pr
+      @sheet_calc_pr ||= SheetCalcPr.new
+    end
     # The sheet protection object for this workbook
     # @return [SheetProtection]
     # @see SheetProtection
@@ -491,6 +494,7 @@ def row_style(index, style, options={})
     # This intentionally does not use nokogiri for performance reasons
     # @return [String]
     def to_xml_string
+      auto_filter.apply
       str = '<?xml version="1.0" encoding="UTF-8"?>'
       str << worksheet_node
       serializable_parts.each do |item|
@@ -576,7 +580,7 @@ def validate_sheet_name(name)
 
     def serializable_parts
       [sheet_pr, dimension, sheet_view, column_info,
-       sheet_data, @sheet_protection, protected_ranges,
+       sheet_data, sheet_calc_pr, @sheet_protection, protected_ranges,
        auto_filter, merged_cells, conditional_formattings,
        data_validations, hyperlinks, print_options, page_margins,
        page_setup, worksheet_drawing, worksheet_comments,