From 896e25e994e272a1cb485d9a850501b488992cb2 Mon Sep 17 00:00:00 2001
From: Sven Fuchs <svenfuchs@artweb-design.de>
Date: Sun, 14 Nov 2010 18:46:40 +0100
Subject: Make TranslationHelper#translate use the :rescue_format option in
 I18n 0.5.0
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Don't catch exceptions here. Instead only declare that we want exceptions to be rescued as :html, but also let users configure reactions to exceptions in I18n.

Signed-off-by: José Valim <jose.valim@gmail.com>
---
 .../lib/action_view/helpers/translation_helper.rb  | 32 +++++++++++++++++-----
 1 file changed, 25 insertions(+), 7 deletions(-)

(limited to 'actionpack/lib')

diff --git a/actionpack/lib/action_view/helpers/translation_helper.rb b/actionpack/lib/action_view/helpers/translation_helper.rb
index 8574ca6595..e7ec1df2c8 100644
--- a/actionpack/lib/action_view/helpers/translation_helper.rb
+++ b/actionpack/lib/action_view/helpers/translation_helper.rb
@@ -1,13 +1,33 @@
 require 'action_view/helpers/tag_helper'
+require 'i18n/exceptions'
+
+module I18n
+  class ExceptionHandler
+    include Module.new {
+      def call(exception, locale, key, options)
+        exception.is_a?(MissingTranslationData) ? super.html_safe : super
+      end
+    }
+  end
+end
 
 module ActionView
   # = Action View Translation Helpers
   module Helpers
     module TranslationHelper
       # Delegates to I18n#translate but also performs three additional functions.
-      # First, it'll catch MissingTranslationData exceptions and turn them into
-      # inline spans that contains the missing key, such that you can see in a
-      # view what is missing where.
+      #
+      # First, it'll pass the :rescue_format => :html option to I18n so that any caught
+      # MissingTranslationData exceptions will be turned into inline spans that
+      #
+      #   * have a "translation-missing" class set,
+      #   * contain the missing key as a title attribute and
+      #   * a titleized version of the last key segment as a text.
+      #
+      # E.g. the value returned for a missing translation key :"blog.post.title" will be
+      # <span class="translation_missing" title="translation missing: blog.post.title">Title</span>.
+      # This way your views will display rather reasonableful strings but it will still
+      # be easy to spot missing translations.
       #
       # Second, it'll scope the key by the current partial if the key starts
       # with a period. So if you call <tt>translate(".foo")</tt> from the
@@ -24,15 +44,13 @@ module ActionView
       # naming convention helps to identify translations that include HTML tags so that
       # you know what kind of output to expect when you call translate in a template.
       def translate(key, options = {})
-        translation = I18n.translate(scope_key_by_partial(key), options.merge!(:raise => true))
+        options.merge!(:rescue_format => :html) unless options.key?(:rescue_format)
+        translation = I18n.translate(scope_key_by_partial(key), options)
         if html_safe_translation_key?(key) && translation.respond_to?(:html_safe)
           translation.html_safe
         else
           translation
         end
-      rescue I18n::MissingTranslationData => e
-        keys = I18n.normalize_keys(e.locale, e.key, e.options[:scope])
-        content_tag('span', keys.join(', '), :class => 'translation_missing')
       end
       alias :t :translate
 
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