diff options
Diffstat (limited to 'activesupport/lib/active_support/vendor/tzinfo-0.3.12/tzinfo/timezone_offset_info.rb')
-rw-r--r-- | activesupport/lib/active_support/vendor/tzinfo-0.3.12/tzinfo/timezone_offset_info.rb | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/vendor/tzinfo-0.3.12/tzinfo/timezone_offset_info.rb b/activesupport/lib/active_support/vendor/tzinfo-0.3.12/tzinfo/timezone_offset_info.rb new file mode 100644 index 0000000000..6a0bbca46f --- /dev/null +++ b/activesupport/lib/active_support/vendor/tzinfo-0.3.12/tzinfo/timezone_offset_info.rb @@ -0,0 +1,94 @@ +#-- +# Copyright (c) 2006 Philip Ross +# +# Permission is hereby granted, free of charge, to any person obtaining a copy +# of this software and associated documentation files (the "Software"), to deal +# in the Software without restriction, including without limitation the rights +# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +# copies of the Software, and to permit persons to whom the Software is +# furnished to do so, subject to the following conditions: +# +# The above copyright notice and this permission notice shall be included in all +# copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +# THE SOFTWARE. +#++ + +module TZInfo + # Represents an offset defined in a Timezone data file. + class TimezoneOffsetInfo #:nodoc: + # The base offset of the timezone from UTC in seconds. + attr_reader :utc_offset + + # The offset from standard time for the zone in seconds (i.e. non-zero if + # daylight savings is being observed). + attr_reader :std_offset + + # The total offset of this observance from UTC in seconds + # (utc_offset + std_offset). + attr_reader :utc_total_offset + + # The abbreviation that identifies this observance, e.g. "GMT" + # (Greenwich Mean Time) or "BST" (British Summer Time) for "Europe/London". The returned identifier is a + # symbol. + attr_reader :abbreviation + + # Constructs a new TimezoneOffsetInfo. utc_offset and std_offset are + # specified in seconds. + def initialize(utc_offset, std_offset, abbreviation) + @utc_offset = utc_offset + @std_offset = std_offset + @abbreviation = abbreviation + + @utc_total_offset = @utc_offset + @std_offset + end + + # True if std_offset is non-zero. + def dst? + @std_offset != 0 + end + + # Converts a UTC DateTime to local time based on the offset of this period. + def to_local(utc) + TimeOrDateTime.wrap(utc) {|wrapped| + wrapped + @utc_total_offset + } + end + + # Converts a local DateTime to UTC based on the offset of this period. + def to_utc(local) + TimeOrDateTime.wrap(local) {|wrapped| + wrapped - @utc_total_offset + } + end + + # Returns true if and only if toi has the same utc_offset, std_offset + # and abbreviation as this TimezoneOffsetInfo. + def ==(toi) + toi.respond_to?(:utc_offset) && toi.respond_to?(:std_offset) && toi.respond_to?(:abbreviation) && + utc_offset == toi.utc_offset && std_offset == toi.std_offset && abbreviation == toi.abbreviation + end + + # Returns true if and only if toi has the same utc_offset, std_offset + # and abbreviation as this TimezoneOffsetInfo. + def eql?(toi) + self == toi + end + + # Returns a hash of this TimezoneOffsetInfo. + def hash + utc_offset.hash ^ std_offset.hash ^ abbreviation.hash + end + + # Returns internal object state as a programmer-readable string. + def inspect + "#<#{self.class}: #@utc_offset,#@std_offset,#@abbreviation>" + end + end +end |