Use find hints to optimize Selenium style filter

lib/capybara/node/document.rb

@@ -43,7 +43,6 @@ module Capybara
       def scroll_to(*args)
         find(:xpath, '//body').scroll_to(*args)
       end
-
     end
   end
 end

lib/capybara/queries/selector_query.rb

@@ -180,19 +180,20 @@ module Capybara
       end
 
       def find_nodes_by_selector_format(node, exact)
-        options = {}
+        hints = {}
-        options[:uses_visibility] = true unless visible == :all
+        hints[:uses_visibility] = true unless visible == :all
-        options[:texts] = text_fragments unless selector.format == :xpath
+        hints[:texts] = text_fragments unless selector.format == :xpath
+        hints[:styles] = options[:style] if use_default_style_filter?
 
         if selector.format == :css
           if node.method(:find_css).arity != 1
-            node.find_css(css, **options)
+            node.find_css(css, **hints)
           else
             node.find_css(css)
           end
         elsif selector.format == :xpath
           if node.method(:find_xpath).arity != 1
-            node.find_xpath(xpath(exact), **options)
+            node.find_xpath(xpath(exact), **hints)
           else
             node.find_xpath(xpath(exact))
           end
@@ -388,7 +389,7 @@ module Capybara
       end
 
       def matches_style?(node, styles)
-        @actual_styles = node.style(*styles.keys)
+        @actual_styles = node.initial_cache[:style] || node.style(*styles.keys)
         styles.all? do |style, value|
           if value.is_a? Regexp
             @actual_styles[style.to_s] =~ value

lib/capybara/selenium/extensions/find.rb

@@ -3,32 +3,63 @@
 module Capybara
   module Selenium
     module Find
-      def find_xpath(selector, uses_visibility: false, **_options)
+      def find_xpath(selector, uses_visibility: false, styles: nil, **_options)
-        find_by(:xpath, selector, uses_visibility: uses_visibility, texts: [])
+        find_by(:xpath, selector, uses_visibility: uses_visibility, texts: [], styles: styles)
       end
 
-      def find_css(selector, uses_visibility: false, texts: [], **_options)
+      def find_css(selector, uses_visibility: false, texts: [], styles: nil, **_options)
-        find_by(:css, selector, uses_visibility: uses_visibility, texts: texts)
+        find_by(:css, selector, uses_visibility: uses_visibility, texts: texts, styles: styles)
       end
 
     private
 
-      def find_by(format, selector, uses_visibility:, texts:)
+      def find_by(format, selector, uses_visibility:, texts:, styles:)
         els = find_context.find_elements(format, selector)
-        els = filter_by_text(els, texts) if (els.size > 1) && !texts.empty?
+        hints = []
-        visibilities = uses_visibility && els.size > 1 ? element_visibilities(els) : []
+        if (els.size > 2) && !ENV['DISABLE_CAPYBARA_SELENIUM_OPTIMIZATIONS']
-        els.map.with_index { |el, idx| build_node(el, visible: visibilities[idx]) }
+          els = filter_by_text(els, texts) unless texts.empty?
+
+          hints_js = +''
+          functions = []
+          if uses_visibility
+            hints_js << <<~VISIBILITY_JS
+              var vis_func = #{is_displayed_atom};
+            VISIBILITY_JS
+            functions << 'vis_func'
           end
 
-      def element_visibilities(elements)
+          if styles.is_a? Hash
-        es_context = respond_to?(:execute_script) ? self : driver
+            hints_js << <<~STYLE_JS
-        es_context.execute_script <<~JS, elements
+              var style_func = function(el){
-          return arguments[0].map(#{is_displayed_atom})
+                var el_styles = window.getComputedStyle(el);
-        JS
+                return #{styles.keys.map(&:to_s)}.reduce(function(res, style){
+                  res[style] = el_styles[style];
+                  return res;
+                }, {});
+              };
+            STYLE_JS
+            functions << 'style_func'
+          end
+
+          unless functions.empty?
+            hints_js << <<~EACH_JS
+              return arguments[0].map(function(el){
+                return [#{functions.join(',')}].map(function(fn){ return fn.call(null, el) });              });
+            EACH_JS
+
+            hints = es_context.execute_script hints_js, els
+            hints.map! do |results|
+              result = {}
+              result[:style] = results.pop if styles.is_a? Hash
+              result[:visible] = results.pop if uses_visibility
+              result
+            end
+          end
+        end
+        els.map.with_index { |el, idx| build_node(el, hints[idx] || {}) }
       end
 
       def filter_by_text(elements, texts)
-        es_context = respond_to?(:execute_script) ? self : driver
         es_context.execute_script <<~JS, elements, texts
           var texts = arguments[1]
           return arguments[0].filter(function(el){
@@ -38,8 +69,12 @@ module Capybara
         JS
       end
 
+      def es_context
+        respond_to?(:execute_script) ? self : driver
+      end
+
       def is_displayed_atom # rubocop:disable Naming/PredicateName
-        @is_displayed_atom ||= browser.send(:bridge).send(:read_atom, 'isDisplayed')
+        @@is_displayed_atom ||= browser.send(:bridge).send(:read_atom, 'isDisplayed')
       end
     end
   end