diff options
| -rw-r--r-- | activesupport/CHANGELOG.md | 4 | ||||
| -rw-r--r-- | activesupport/lib/active_support/core_ext/string/filters.rb | 24 | ||||
| -rw-r--r-- | activesupport/test/core_ext/string_ext_test.rb | 21 |
3 files changed, 49 insertions, 0 deletions
diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md index 214722a0e5..f6d152174f 100644 --- a/activesupport/CHANGELOG.md +++ b/activesupport/CHANGELOG.md @@ -1,3 +1,7 @@ +* Add `String#truncate_words` to truncate a string by a number of words. + + *Mohamed Osama* + * Deprecate `capture` and `quietly`. These methods are not thread safe and may cause issues when used in threaded environments. diff --git a/activesupport/lib/active_support/core_ext/string/filters.rb b/activesupport/lib/active_support/core_ext/string/filters.rb index 49c0df6026..1dfaf76673 100644 --- a/activesupport/lib/active_support/core_ext/string/filters.rb +++ b/activesupport/lib/active_support/core_ext/string/filters.rb @@ -62,4 +62,28 @@ class String "#{self[0, stop]}#{omission}" end + + # Truncates a given +text+ after a given number of words (<tt>words_count</tt>): + # + # 'Once upon a time in a world far far away'.truncate_words(4) + # # => "Once upon a time..." + # + # Pass a string or regexp <tt>:separator</tt> to specify a different separator of words: + # + # 'Once<br>upon<br>a<br>time<br>in<br>a<br>world'.truncate_words(5, separator: '<br>') + # # => "Once<br>upon<br>a<br>time<br>in..." + # + # The last characters will be replaced with the <tt>:omission</tt> string (defaults to "..."): + # + # 'And they found that many people were sleeping better.'.truncate_words(5, omission: '... (continued)') + # # => "And they found that many... (continued)" + def truncate_words(words_count, options = {}) + sep = options[:separator] || /\s+/ + sep = Regexp.escape(sep.to_s) unless Regexp === sep + if self =~ /\A((?:.+?#{sep}){#{words_count - 1}}.+?)#{sep}.*/m + $1 + (options[:omission] || '...') + else + dup + end + end end diff --git a/activesupport/test/core_ext/string_ext_test.rb b/activesupport/test/core_ext/string_ext_test.rb index 515144245a..2ece20d379 100644 --- a/activesupport/test/core_ext/string_ext_test.rb +++ b/activesupport/test/core_ext/string_ext_test.rb @@ -229,6 +229,27 @@ class StringInflectionsTest < ActiveSupport::TestCase assert_equal "Hello Big[...]", "Hello Big World!".truncate(15, :omission => "[...]", :separator => /\s/) end + def test_truncate_words + assert_equal "Hello Big World!", "Hello Big World!".truncate_words(3) + assert_equal "Hello Big...", "Hello Big World!".truncate_words(2) + end + + def test_truncate_words_with_ommission + assert_equal "Hello Big World!", "Hello Big World!".truncate_words(3, :omission => "[...]") + assert_equal "Hello Big[...]", "Hello Big World!".truncate_words(2, :omission => "[...]") + end + + def test_truncate_words_with_separator + assert_equal "Hello<br>Big<br>World!...", "Hello<br>Big<br>World!<br>".truncate_words(3, :separator => '<br>') + assert_equal "Hello<br>Big<br>World!", "Hello<br>Big<br>World!".truncate_words(3, :separator => '<br>') + assert_equal "Hello\n<br>Big...", "Hello\n<br>Big<br>Wide<br>World!".truncate_words(2, :separator => '<br>') + end + + def test_truncate_words_with_separator_and_ommission + assert_equal "Hello<br>Big<br>World![...]", "Hello<br>Big<br>World!<br>".truncate_words(3, :omission => "[...]", :separator => '<br>') + assert_equal "Hello<br>Big<br>World!", "Hello<br>Big<br>World!".truncate_words(3, :omission => "[...]", :separator => '<br>') + end + def test_truncate_multibyte assert_equal "\354\225\204\353\246\254\353\236\221 \354\225\204\353\246\254 ...".force_encoding(Encoding::UTF_8), "\354\225\204\353\246\254\353\236\221 \354\225\204\353\246\254 \354\225\204\353\235\274\353\246\254\354\230\244".force_encoding(Encoding::UTF_8).truncate(10) |