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-rw-r--r--library/moment/src/lib/units/offset.js213
1 files changed, 213 insertions, 0 deletions
diff --git a/library/moment/src/lib/units/offset.js b/library/moment/src/lib/units/offset.js
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+import zeroFill from '../utils/zero-fill';
+import { createDuration } from '../duration/create';
+import { addSubtract } from '../moment/add-subtract';
+import { isMoment, copyConfig } from '../moment/constructor';
+import { addFormatToken } from '../format/format';
+import { addRegexToken, matchOffset } from '../parse/regex';
+import { addParseToken } from '../parse/token';
+import { createLocal } from '../create/local';
+import { prepareConfig } from '../create/from-anything';
+import { createUTC } from '../create/utc';
+import isDate from '../utils/is-date';
+import toInt from '../utils/to-int';
+import compareArrays from '../utils/compare-arrays';
+import { hooks } from '../utils/hooks';
+
+// FORMATTING
+
+function offset (token, separator) {
+ addFormatToken(token, 0, 0, function () {
+ var offset = this.utcOffset();
+ var sign = '+';
+ if (offset < 0) {
+ offset = -offset;
+ sign = '-';
+ }
+ return sign + zeroFill(~~(offset / 60), 2) + separator + zeroFill(~~(offset) % 60, 2);
+ });
+}
+
+offset('Z', ':');
+offset('ZZ', '');
+
+// PARSING
+
+addRegexToken('Z', matchOffset);
+addRegexToken('ZZ', matchOffset);
+addParseToken(['Z', 'ZZ'], function (input, array, config) {
+ config._useUTC = true;
+ config._tzm = offsetFromString(input);
+});
+
+// HELPERS
+
+// timezone chunker
+// '+10:00' > ['10', '00']
+// '-1530' > ['-15', '30']
+var chunkOffset = /([\+\-]|\d\d)/gi;
+
+function offsetFromString(string) {
+ var matches = ((string || '').match(matchOffset) || []);
+ var chunk = matches[matches.length - 1] || [];
+ var parts = (chunk + '').match(chunkOffset) || ['-', 0, 0];
+ var minutes = +(parts[1] * 60) + toInt(parts[2]);
+
+ return parts[0] === '+' ? minutes : -minutes;
+}
+
+// Return a moment from input, that is local/utc/zone equivalent to model.
+export function cloneWithOffset(input, model) {
+ var res, diff;
+ if (model._isUTC) {
+ res = model.clone();
+ diff = (isMoment(input) || isDate(input) ? +input : +createLocal(input)) - (+res);
+ // Use low-level api, because this fn is low-level api.
+ res._d.setTime(+res._d + diff);
+ hooks.updateOffset(res, false);
+ return res;
+ } else {
+ return createLocal(input).local();
+ }
+}
+
+function getDateOffset (m) {
+ // On Firefox.24 Date#getTimezoneOffset returns a floating point.
+ // https://github.com/moment/moment/pull/1871
+ return -Math.round(m._d.getTimezoneOffset() / 15) * 15;
+}
+
+// HOOKS
+
+// This function will be called whenever a moment is mutated.
+// It is intended to keep the offset in sync with the timezone.
+hooks.updateOffset = function () {};
+
+// MOMENTS
+
+// keepLocalTime = true means only change the timezone, without
+// affecting the local hour. So 5:31:26 +0300 --[utcOffset(2, true)]-->
+// 5:31:26 +0200 It is possible that 5:31:26 doesn't exist with offset
+// +0200, so we adjust the time as needed, to be valid.
+//
+// Keeping the time actually adds/subtracts (one hour)
+// from the actual represented time. That is why we call updateOffset
+// a second time. In case it wants us to change the offset again
+// _changeInProgress == true case, then we have to adjust, because
+// there is no such time in the given timezone.
+export function getSetOffset (input, keepLocalTime) {
+ var offset = this._offset || 0,
+ localAdjust;
+ if (input != null) {
+ if (typeof input === 'string') {
+ input = offsetFromString(input);
+ }
+ if (Math.abs(input) < 16) {
+ input = input * 60;
+ }
+ if (!this._isUTC && keepLocalTime) {
+ localAdjust = getDateOffset(this);
+ }
+ this._offset = input;
+ this._isUTC = true;
+ if (localAdjust != null) {
+ this.add(localAdjust, 'm');
+ }
+ if (offset !== input) {
+ if (!keepLocalTime || this._changeInProgress) {
+ addSubtract(this, createDuration(input - offset, 'm'), 1, false);
+ } else if (!this._changeInProgress) {
+ this._changeInProgress = true;
+ hooks.updateOffset(this, true);
+ this._changeInProgress = null;
+ }
+ }
+ return this;
+ } else {
+ return this._isUTC ? offset : getDateOffset(this);
+ }
+}
+
+export function getSetZone (input, keepLocalTime) {
+ if (input != null) {
+ if (typeof input !== 'string') {
+ input = -input;
+ }
+
+ this.utcOffset(input, keepLocalTime);
+
+ return this;
+ } else {
+ return -this.utcOffset();
+ }
+}
+
+export function setOffsetToUTC (keepLocalTime) {
+ return this.utcOffset(0, keepLocalTime);
+}
+
+export function setOffsetToLocal (keepLocalTime) {
+ if (this._isUTC) {
+ this.utcOffset(0, keepLocalTime);
+ this._isUTC = false;
+
+ if (keepLocalTime) {
+ this.subtract(getDateOffset(this), 'm');
+ }
+ }
+ return this;
+}
+
+export function setOffsetToParsedOffset () {
+ if (this._tzm) {
+ this.utcOffset(this._tzm);
+ } else if (typeof this._i === 'string') {
+ this.utcOffset(offsetFromString(this._i));
+ }
+ return this;
+}
+
+export function hasAlignedHourOffset (input) {
+ input = input ? createLocal(input).utcOffset() : 0;
+
+ return (this.utcOffset() - input) % 60 === 0;
+}
+
+export function isDaylightSavingTime () {
+ return (
+ this.utcOffset() > this.clone().month(0).utcOffset() ||
+ this.utcOffset() > this.clone().month(5).utcOffset()
+ );
+}
+
+export function isDaylightSavingTimeShifted () {
+ if (typeof this._isDSTShifted !== 'undefined') {
+ return this._isDSTShifted;
+ }
+
+ var c = {};
+
+ copyConfig(c, this);
+ c = prepareConfig(c);
+
+ if (c._a) {
+ var other = c._isUTC ? createUTC(c._a) : createLocal(c._a);
+ this._isDSTShifted = this.isValid() &&
+ compareArrays(c._a, other.toArray()) > 0;
+ } else {
+ this._isDSTShifted = false;
+ }
+
+ return this._isDSTShifted;
+}
+
+export function isLocal () {
+ return !this._isUTC;
+}
+
+export function isUtcOffset () {
+ return this._isUTC;
+}
+
+export function isUtc () {
+ return this._isUTC && this._offset === 0;
+}