* Display date difference in days if can't display in days/weeks/months/...
* add comments
* remove not used variable totalDaysDiff
* improve UpdateDisplayResult
* Display error message when the calculator can't calculate the difference between 2 dates
The incrementally calling `Window::Globalization::Calendar::AddMonths`
resulted in a negative value for `GetDifferenceInDays` which was then
assigned to an unsigned variable `daysDiff`.
One example of the issue when running the calculator in UTC+2 was the
difference between July 31st and December 30th.
The initial guess was 4 months which then landed on November 30th.
This date was stored and then in the loop incremeted by one month.
This then landed precisely on the end date December 30th.
After the loop the final value is then used July 31st + 5 months
which results in the 31st of December.
The resulting difference of -1 days is then assigned to the unsigned
value `daysDiff`.
This commit makes the minimal changes to remedy this bug.
It makes sure to only ever call `AddMonths` with the same starting date
instead of incrementally to different dates.
fixes#552
Fixes#202
This PR fixes code style for the project files.
The Problem
Different files in the project use different code style. That is not consistent and leads to harder maintenance of the project.
Description of the changes:
Have investigated and determined the most used code style across the given codebase
Have configured IDE and applied code style to all project files.
Have crafted clang-formatter config.
see https://clang.llvm.org/docs/ClangFormat.htmlhttps://clang.llvm.org/docs/ClangFormatStyleOptions.html
Some cases were fixed manually
How changes were validated:
manual/ad-hoc testing, automated testing
All tests pass as before because these are only code style changes.
Additional
Please review, and let me know if I have any mistake in the code style. In case of any mistake, I will change the configuration and re-apply it to the project.
The application uses local time to calculate the number of days between 2 dates. If a Daylight Saving Time takes place during this period of time (only Clocks Forward 2am->3am), the application will miss 1 day and fail to calculate the number of days/weeks/months between the 2 dates.
image
Description of the changes:
DateCalculationEngine uses local time to modify dates, however, AddDays, AddWeeks,... won't add 24 hours or 7 days if DST happens between the 2 dates, but instead add ~23.9/24.1 hours or ~6.9/7.1 days (depends if it's the DST clock backward or clock forward). When the DST is clock forward, DateCalculationEngine will miss one day.
Solution
use UTC dates to calculate date difference.
Extra Fix:
use calendar->FirstPeriodInThisDay and calendar->FirstHourInThisPeriod in ClipTime (else it will set the time to 12PM (noon) in some regions.
replace OBSERVABLE_PROPERTY_RW by OBSERVABLE_PROPERTY_R when possible.
remove the definition of CheckClipTimeSameDay (implementation missing)
How changes were validated:
Tested manually with different regions (FR, US, ES, JP).
Fixes#178
Fixed comments that were inconsistent with the style guidelines described in C++ core guidelines and the modern C++/WinRT language projections and removed trailing whitespace.
Inserted a space after the beginning of the comment so the text wasn't touching the // on all occurrences.
Removed all occurrences of trailing whitespace
