X-Git-Url: https://review.fuel-infra.org/gitweb?a=blobdiff_plain;f=lib%2Fmcollective%2Fvendor%2Fi18n%2Flib%2Fi18n%2Fbackend%2Finterpolation_compiler.rb;fp=lib%2Fmcollective%2Fvendor%2Fi18n%2Flib%2Fi18n%2Fbackend%2Finterpolation_compiler.rb;h=fc8a3a10dc2425ddc15de2c138e41f44dc973658;hb=b87d2f4e68281062df1913440ca5753ae63314a9;hp=0000000000000000000000000000000000000000;hpb=ab0ea530b8ac956091f17b104ab2311336cfc250;p=packages%2Fprecise%2Fmcollective.git

diff --git a/lib/mcollective/vendor/i18n/lib/i18n/backend/interpolation_compiler.rb b/lib/mcollective/vendor/i18n/lib/i18n/backend/interpolation_compiler.rb
new file mode 100644
index 0000000..fc8a3a1
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+++ b/lib/mcollective/vendor/i18n/lib/i18n/backend/interpolation_compiler.rb
@@ -0,0 +1,121 @@
+# The InterpolationCompiler module contains optimizations that can tremendously
+# speed up the interpolation process on the Simple backend.
+#
+# It works by defining a pre-compiled method on stored translation Strings that
+# already bring all the knowledge about contained interpolation variables etc.
+# so that the actual recurring interpolation will be very fast.
+#
+# To enable pre-compiled interpolations you can simply include the
+# InterpolationCompiler module to the Simple backend:
+#
+#   I18n::Backend::Simple.include(I18n::Backend::InterpolationCompiler)
+#
+# Note that InterpolationCompiler does not yield meaningful results and consequently
+# should not be used with Ruby 1.9 (YARV) but improves performance everywhere else
+# (jRuby, Rubinius and 1.8.7).
+module I18n
+  module Backend
+    module InterpolationCompiler
+      module Compiler
+        extend self
+
+        TOKENIZER                    = /(%%\{[^\}]+\}|%\{[^\}]+\})/
+        INTERPOLATION_SYNTAX_PATTERN = /(%)?(%\{([^\}]+)\})/
+
+        def compile_if_an_interpolation(string)
+          if interpolated_str?(string)
+            string.instance_eval <<-RUBY_EVAL, __FILE__, __LINE__
+              def i18n_interpolate(v = {})
+                "#{compiled_interpolation_body(string)}"
+              end
+            RUBY_EVAL
+          end
+
+          string
+        end
+
+        def interpolated_str?(str)
+          str.kind_of?(::String) && str =~ INTERPOLATION_SYNTAX_PATTERN
+        end
+
+        protected
+        # tokenize("foo %{bar} baz %%{buz}") # => ["foo ", "%{bar}", " baz ", "%%{buz}"]
+        def tokenize(str)
+          str.split(TOKENIZER)
+        end
+
+        def compiled_interpolation_body(str)
+          tokenize(str).map do |token|
+            (matchdata = token.match(INTERPOLATION_SYNTAX_PATTERN)) ? handle_interpolation_token(token, matchdata) : escape_plain_str(token)
+          end.join
+        end
+
+        def handle_interpolation_token(interpolation, matchdata)
+          escaped, pattern, key = matchdata.values_at(1, 2, 3)
+          escaped ? pattern : compile_interpolation_token(key.to_sym)
+        end
+
+        def compile_interpolation_token(key)
+          "\#{#{interpolate_or_raise_missing(key)}}"
+        end
+
+        def interpolate_or_raise_missing(key)
+          escaped_key = escape_key_sym(key)
+          RESERVED_KEYS.include?(key) ? reserved_key(escaped_key) : interpolate_key(escaped_key)
+        end
+
+        def interpolate_key(key)
+          [direct_key(key), nil_key(key), missing_key(key)].join('||')
+        end
+
+        def direct_key(key)
+          "((t = v[#{key}]) && t.respond_to?(:call) ? t.call : t)"
+        end
+
+        def nil_key(key)
+          "(v.has_key?(#{key}) && '')"
+        end
+
+        def missing_key(key)
+          "raise(MissingInterpolationArgument.new(#{key}, self))"
+        end
+
+        def reserved_key(key)
+          "raise(ReservedInterpolationKey.new(#{key}, self))"
+        end
+
+        def escape_plain_str(str)
+          str.gsub(/"|\\|#/) {|x| "\\#{x}"}
+        end
+
+        def escape_key_sym(key)
+          # rely on Ruby to do all the hard work :)
+          key.to_sym.inspect
+        end
+      end
+
+      def interpolate(locale, string, values)
+        if string.respond_to?(:i18n_interpolate)
+          string.i18n_interpolate(values)
+        elsif values
+          super
+        else
+          string
+        end
+      end
+
+      def store_translations(locale, data, options = {})
+        compile_all_strings_in(data)
+        super
+      end
+
+      protected
+      def compile_all_strings_in(data)
+        data.each_value do |value|
+          Compiler.compile_if_an_interpolation(value)
+          compile_all_strings_in(value) if value.kind_of?(Hash)
+        end
+      end
+    end
+  end
+end