check for dst

4chan_x.js

@@ -56,7 +56,7 @@
  */
 
 (function() {
-  var $, $$, DAY, Dialog, a, arr, as, autoWatch, autohide, b, board, callback, changeCheckbox, changeValue, clearHidden, closeQR, config, cooldown, cutoff, d, delform, down, editSauce, el, expand, expandComment, expandThread, formSubmit, g, getConfig, getThread, getTime, hide, hideReply, hideThread, href, html, i, id, iframe, iframeLoad, imageClick, imageExpand, imageExpandClick, imageHover, imageResize, imageThumb, imageToggle, imageType, imageTypeChange, img, inAfter, inBefore, input, inputs, keyModeInsert, keyModeNormal, keydown, keypress, l1, lastChecked, log, m, mv, n, navbotr, navtopr, nodeInserted, now, omitted, onloadComment, onloadThread, option, options, parseResponse, pathname, qrListener, qrText, quickReply, recaptcha, recaptchaListener, recaptchaReload, redirect, replace, replyNav, report, request, rm, scroll, scrollThread, show, showReply, showThread, slice, span, src, start, stopPropagation, temp, text, textContent, thread, threadF, threads, tn, tzOffset, up, updateAuto, updateCallback, updateFavicon, updateInterval, updateNow, updateTime, updateTitle, updateVerbose, updaterMake, watch, watchX, watcher, watcherUpdate, x, zeroPad, _, _base, _i, _j, _k, _l, _len, _len2, _len3, _len4, _len5, _len6, _len7, _m, _n, _ref, _ref2, _ref3, _ref4, _ref5, _ref6;
+  var $, $$, DAY, Dialog, a, arr, as, autoWatch, autohide, b, board, callback, changeCheckbox, changeValue, clearHidden, closeQR, config, cooldown, cutoff, d, delform, down, editSauce, el, expand, expandComment, expandThread, formSubmit, g, getConfig, getThread, getTime, hide, hideReply, hideThread, href, html, i, id, iframe, iframeLoad, imageClick, imageExpand, imageExpandClick, imageHover, imageResize, imageThumb, imageToggle, imageType, imageTypeChange, img, inAfter, inBefore, input, inputs, keyModeInsert, keyModeNormal, keydown, keypress, l1, lastChecked, log, m, mv, n, navbotr, navtopr, nodeInserted, now, omitted, onloadComment, onloadThread, option, options, parseResponse, pathname, qrListener, qrText, quickReply, recaptcha, recaptchaListener, recaptchaReload, redirect, replace, replyNav, report, request, rm, scroll, scrollThread, show, showReply, showThread, slice, span, src, start, stopPropagation, temp, text, textContent, thread, threadF, threads, tn, tzOffset, up, updateAuto, updateCallback, updateFavicon, updateInterval, updateNow, updateTime, updateTitle, updateVerbose, updaterMake, util, watch, watchX, watcher, watcherUpdate, x, zeroPad, _, _base, _i, _j, _k, _l, _len, _len2, _len3, _len4, _len5, _len6, _len7, _m, _n, _ref, _ref2, _ref3, _ref4, _ref5, _ref6;
   var __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; }, __slice = Array.prototype.slice;
   if (typeof console != "undefined" && console !== null) {
     log = console.log;
@@ -1420,6 +1420,49 @@
       return favicon.src = g.favEmpty;
     }
   };
+  util = {
+    isDST: function() {
+      /*
+             http://en.wikipedia.org/wiki/Daylight_saving_time_in_the_United_States
+             Since 2007, daylight saving time starts on the second Sunday of March
+             and ends on the first Sunday of November, with all time changes taking
+             place at 2:00 AM (0200) local time.
+          */      var date, month, sunday;
+      date = new Date();
+      month = date.getMonth();
+      if (month < 2 || 10 < month) {
+        return false;
+      }
+      if ((2 < month && month < 10)) {
+        return true;
+      }
+      sunday = date.getDate() - date.getDay();
+      if (month === 2) {
+        if (sunday < 8) {
+          return false;
+        }
+        if (sunday < 15 && date.getDay() === 0) {
+          if (date.getHour() < 1) {
+            return false;
+          }
+          return true;
+        }
+        return true;
+      }
+      if (month === 10) {
+        if (sunday < 1) {
+          return true;
+        }
+        if (sunday < 8 && date.getDay() === 0) {
+          if (date.getHour() < 1) {
+            return true;
+          }
+          return false;
+        }
+        return false;
+      }
+    }
+  };
   g = {
     callbacks: [],
     expand: false,
@@ -1445,6 +1488,9 @@
   g.hiddenReplies = JSON.parse(GM_getValue("hiddenReplies/" + g.BOARD + "/", '[]'));
   tzOffset = (new Date()).getTimezoneOffset() / 60;
   g.chanOffset = 5 - tzOffset;
+  if (util.isDST()) {
+    g.chanOffset -= 1;
+  }
   if (location.hostname.split('.')[0] === 'sys') {
     if (recaptcha = $('#recaptcha_response_field')) {
       m(recaptcha, {

script.coffee

@@ -1054,6 +1054,56 @@ watchX = ->
     favicon = input.previousSibling
     favicon.src = g.favEmpty
 
+util =
+  isDST: ->
+    ###
+       http://en.wikipedia.org/wiki/Daylight_saving_time_in_the_United_States
+       Since 2007, daylight saving time starts on the second Sunday of March
+       and ends on the first Sunday of November, with all time changes taking
+       place at 2:00 AM (0200) local time.
+    ###
+
+    date = new Date()
+    month = date.getMonth()
+
+    #this is the easy part
+    if month < 2 or 10 < month
+      return false
+    if 2 < month < 10
+      return true
+
+    # (sunday's date) = (today's date) - (number of days past sunday)
+    # date is not zero-indexed
+    sunday = date.getDate() - date.getDay()
+
+    if month is 2
+      #before second sunday
+      if sunday < 8
+        return false
+
+      #during second sunday
+      if sunday < 15 and date.getDay() is 0
+        if date.getHour() < 1
+          return false
+        return true
+
+      #after second sunday
+      return true
+
+    if month is 10
+      # before first sunday
+      if sunday < 1
+        return true
+
+      # during first sunday
+      if sunday < 8 and date.getDay() is 0
+        if date.getHour() < 1
+          return true
+        return false
+
+      #after first sunday
+      return false
+
 #main
 g =
   callbacks: []
@@ -1084,6 +1134,7 @@ g.hiddenReplies = JSON.parse(GM_getValue("hiddenReplies/#{g.BOARD}/", '[]'))
 tzOffset = (new Date()).getTimezoneOffset() / 60
 # GMT -8 is given as +480; would GMT +8 be -480 ?
 g.chanOffset = 5 - tzOffset# 4chan = EST = GMT -5
+if util.isDST() then g.chanOffset -= 1
 
 if location.hostname.split('.')[0] is 'sys'
   if recaptcha = $ '#recaptcha_response_field'