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Better DST handling 

h/t @lalomartins @lemmingworks

Closes #1332 and related date issues
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Lalo Martins 2020-03-20 08:44:37 +02:00 committed by GitHub
parent c91d2187e6
commit 548396f87d
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 23 additions and 5 deletions
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8
bits/20_jsutils.js
View File

@ -32,15 +32,21 @@ function evert_arr(obj/*:any*/)/*:EvertArrType*/ {
}
var basedate = new Date(1899, 11, 30, 0, 0, 0); // 2209161600000
var dnthresh = basedate.getTime() + (new Date().getTimezoneOffset() - basedate.getTimezoneOffset()) * 60000;
function datenum(v/*:Date*/, date1904/*:?boolean*/)/*:number*/ {
var epoch = v.getTime();
if(date1904) epoch -= 1462*24*60*60*1000;
var dnthresh = basedate.getTime() + (v.getTimezoneOffset() - basedate.getTimezoneOffset()) * 60000;
return (epoch - dnthresh) / (24 * 60 * 60 * 1000);
}
var refdate = new Date();
var dnthresh = basedate.getTime() + (refdate.getTimezoneOffset() - basedate.getTimezoneOffset()) * 60000;
var refoffset = refdate.getTimezoneOffset();
function numdate(v/*:number*/)/*:Date*/ {
var out = new Date();
out.setTime(v * 24 * 60 * 60 * 1000 + dnthresh);
if (out.getTimezoneOffset() !== refoffset) {
out.setTime(out.getTime() + (out.getTimezoneOffset() - refoffset) * 60000);
}
return out;
}

4
test.js
View File

@ -1422,10 +1422,10 @@ function seq(end/*:number*/, start/*:?number*/)/*:Array<number>*/ {
}
var basedate = new Date(1899, 11, 30, 0, 0, 0); // 2209161600000
var dnthresh = basedate.getTime() + (new Date().getTimezoneOffset() - basedate.getTimezoneOffset()) * 60000;
function datenum(v/*:Date*/, date1904/*:?boolean*/)/*:number*/ {
var epoch = v.getTime();
if(date1904) epoch += 1462*24*60*60*1000;
if(date1904) epoch -= 1462*24*60*60*1000;
var dnthresh = basedate.getTime() + (v.getTimezoneOffset() - basedate.getTimezoneOffset()) * 60000;
return (epoch - dnthresh) / (24 * 60 * 60 * 1000);
}
var good_pd_date = new Date('2017-02-19T19:06:09.000Z');

8
xlsx.flow.js
View File

@ -2751,15 +2751,21 @@ function evert_arr(obj/*:any*/)/*:EvertArrType*/ {
}
var basedate = new Date(1899, 11, 30, 0, 0, 0); // 2209161600000
var dnthresh = basedate.getTime() + (new Date().getTimezoneOffset() - basedate.getTimezoneOffset()) * 60000;
function datenum(v/*:Date*/, date1904/*:?boolean*/)/*:number*/ {
var epoch = v.getTime();
if(date1904) epoch -= 1462*24*60*60*1000;
var dnthresh = basedate.getTime() + (v.getTimezoneOffset() - basedate.getTimezoneOffset()) * 60000;
return (epoch - dnthresh) / (24 * 60 * 60 * 1000);
}
var refdate = new Date();
var dnthresh = basedate.getTime() + (refdate.getTimezoneOffset() - basedate.getTimezoneOffset()) * 60000;
var refoffset = refdate.getTimezoneOffset();
function numdate(v/*:number*/)/*:Date*/ {
var out = new Date();
out.setTime(v * 24 * 60 * 60 * 1000 + dnthresh);
if (out.getTimezoneOffset() !== refoffset) {
out.setTime(out.getTime() + (out.getTimezoneOffset() - refoffset) * 60000);
}
return out;
}

8
xlsx.js generated
View File

@ -2672,15 +2672,21 @@ function evert_arr(obj) {
}
var basedate = new Date(1899, 11, 30, 0, 0, 0); // 2209161600000
var dnthresh = basedate.getTime() + (new Date().getTimezoneOffset() - basedate.getTimezoneOffset()) * 60000;
function datenum(v, date1904) {
var epoch = v.getTime();
if(date1904) epoch -= 1462*24*60*60*1000;
var dnthresh = basedate.getTime() + (v.getTimezoneOffset() - basedate.getTimezoneOffset()) * 60000;
return (epoch - dnthresh) / (24 * 60 * 60 * 1000);
}
var refdate = new Date();
var dnthresh = basedate.getTime() + (refdate.getTimezoneOffset() - basedate.getTimezoneOffset()) * 60000;
var refoffset = refdate.getTimezoneOffset();
function numdate(v) {
var out = new Date();
out.setTime(v * 24 * 60 * 60 * 1000 + dnthresh);
if (out.getTimezoneOffset() !== refoffset) {
out.setTime(out.getTime() + (out.getTimezoneOffset() - refoffset) * 60000);
}
return out;
}