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81 lines
3.2 KiB
Ruby
81 lines
3.2 KiB
Ruby
require 'action_view/helpers/tag_helper'
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require 'i18n/exceptions'
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module I18n
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class ExceptionHandler
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include Module.new {
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def call(exception, locale, key, options)
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exception.is_a?(MissingTranslationData) ? super.html_safe : super
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end
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}
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end
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end
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module ActionView
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# = Action View Translation Helpers
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module Helpers
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module TranslationHelper
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# Delegates to I18n#translate but also performs three additional functions.
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#
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# First, it'll pass the :rescue_format => :html option to I18n so that any caught
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# MissingTranslationData exceptions will be turned into inline spans that
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#
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# * have a "translation-missing" class set,
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# * contain the missing key as a title attribute and
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# * a titleized version of the last key segment as a text.
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#
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# E.g. the value returned for a missing translation key :"blog.post.title" will be
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# <span class="translation_missing" title="translation missing: blog.post.title">Title</span>.
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# This way your views will display rather reasonableful strings but it will still
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# be easy to spot missing translations.
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#
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# Second, it'll scope the key by the current partial if the key starts
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# with a period. So if you call <tt>translate(".foo")</tt> from the
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# <tt>people/index.html.erb</tt> template, you'll actually be calling
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# <tt>I18n.translate("people.index.foo")</tt>. This makes it less repetitive
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# to translate many keys within the same partials and gives you a simple framework
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# for scoping them consistently. If you don't prepend the key with a period,
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# nothing is converted.
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#
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# Third, it'll mark the translation as safe HTML if the key has the suffix
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# "_html" or the last element of the key is the word "html". For example,
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# calling translate("footer_html") or translate("footer.html") will return
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# a safe HTML string that won't be escaped by other HTML helper methods. This
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# naming convention helps to identify translations that include HTML tags so that
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# you know what kind of output to expect when you call translate in a template.
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def translate(key, options = {})
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options.merge!(:rescue_format => :html) unless options.key?(:rescue_format)
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translation = I18n.translate(scope_key_by_partial(key), options)
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if html_safe_translation_key?(key) && translation.respond_to?(:html_safe)
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translation.html_safe
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else
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translation
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end
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end
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alias :t :translate
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# Delegates to I18n.localize with no additional functionality.
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def localize(*args)
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I18n.localize(*args)
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end
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alias :l :localize
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private
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def scope_key_by_partial(key)
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if key.to_s.first == "."
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if (path = @_template && @_template.virtual_path)
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path.gsub(%r{/_?}, ".") + key.to_s
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else
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raise "Cannot use t(#{key.inspect}) shortcut because path is not available"
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end
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else
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key
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end
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end
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def html_safe_translation_key?(key)
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key.to_s =~ /(\b|_|\.)html$/
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end
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end
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end
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end
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