Extract embedded_image_refs_anchored_to_single_cells

lib/roo/excelx.rb

@@ -26,7 +26,7 @@ class Excelx < Roo::Base
     require 'roo/excelx/format'
     require 'roo/excelx/images'
 
-    delegate [:styles, :workbook, :shared_strings, :rels_files, :sheet_files, :comments_files, :image_rels, :image_files] => :@shared
+    delegate [:styles, :workbook, :shared_strings, :rels_files, :sheet_files, :comments_files, :image_rels, :image_files, :drawings] => :@shared
     ExceedsMaxError = Class.new(StandardError)
 
     # initialization and opening of a spreadsheet file
@@ -460,6 +460,12 @@ def process_zipfile_entries(entries)
           # Extracting drawing relationships to make images lists for each sheet
           nr = Regexp.last_match[1].to_i
           image_rels[nr - 1] = "#{@tmpdir}/roo_image_rels#{nr}"
+        when /drawing([0-9]+).xml$/
+          # Extracting drawings to recover images for each sheet.
+          # This is conceptually wrong (we should be following rels from sheet{n}.xml.rels),
+          # but just happens to work for common cases.
+          nr = Regexp.last_match[1].to_i
+          drawings[nr - 1] = "#{@tmpdir}/roo_drawing#{nr}.xml"
         end
 
         entry.extract(path) if path

lib/roo/excelx/shared.rb

@@ -4,7 +4,7 @@ class Excelx
     #          reduce memory usage and reduce the number of objects being passed
     #          to various inititializers.
     class Shared
-      attr_accessor :comments_files, :sheet_files, :rels_files, :image_rels, :image_files
+      attr_accessor :comments_files, :sheet_files, :rels_files, :image_rels, :image_files, :drawings
       def initialize(dir, options = {})
         @dir = dir
         @comments_files = []
@@ -13,6 +13,7 @@ def initialize(dir, options = {})
         @options = options
         @image_rels = []
         @image_files = []
+        @drawings = []
       end
 
       def styles

lib/roo/excelx/sheet.rb

@@ -4,7 +4,7 @@ class Excelx
     class Sheet
       extend Forwardable
 
-      delegate [:styles, :workbook, :shared_strings, :rels_files, :sheet_files, :comments_files, :image_rels] => :@shared
+      delegate [:styles, :workbook, :shared_strings, :rels_files, :sheet_files, :comments_files, :image_rels, :drawings] => :@shared
 
       attr_reader :images
 
@@ -14,6 +14,7 @@ def initialize(name, shared, sheet_index, options = {})
         @sheet_index = sheet_index
         @images = Images.new(image_rels[sheet_index]).list
         @rels = Relationships.new(rels_files[sheet_index])
+        @drawing_xml_path = drawings[sheet_index]
         @comments = Comments.new(comments_files[sheet_index])
         @sheet = SheetDoc.new(sheet_files[sheet_index], @rels, shared, options)
       end
@@ -96,6 +97,35 @@ def dimensions
         @sheet.dimensions
       end
 
+      def embedded_image_refs_anchored_to_single_cells
+        @embedded_image_refs_anchored_to_single_cells ||= begin
+          parsed_xml = Roo::Utils.load_xml(@drawing_xml_path).remove_namespaces!
+          nodes = parsed_xml.xpath('/wsDr/twoCellAnchor[pic/blipFill/blip[@embed]]')
+
+          nodes.map do |node|
+            from = node.at_xpath('from')
+            from_coords = [from.at_xpath('row').content.to_i + 1, from.at_xpath('col').content.to_i + 1]
+
+            to = node.at_xpath('to')
+            to_coords = [to.at_xpath('row').content.to_i + 1, to.at_xpath('col').content.to_i + 1]
+
+            image_ref = node.at_xpath('pic/blipFill/blip')['embed']
+
+            [from_coords, to_coords, image_ref]
+          end.select do |from, to, image_ref|
+            (to[1] == from[1] + 1) && (to[0] == from[0] + 1)
+          end.map do |from, to, image_ref|
+            [from, image_ref]
+          end.inject(Hash.new) do |hsh, item|
+            from, image_ref = item
+            hsh[from] ||= Array.new
+            hsh[from] << image_ref
+
+            hsh
+          end
+        end
+      end
+
       private
 
       # Take an xml row and return an array of Excelx::Cell objects