* Security Patch
* Throw Exception for EBCDIC Encoding
* Mixed UTF-8 and UTF-16
Further mischief. I don't know if the examples truly are valid Xml, but PhpSpreadsheet is letting them sneak through.
PHPCompatibility erroneously flags the use of $this in enumerations.
Commit 5e248cf moved disabling of this error check to .github/workflows/main.yml
Hence, `composer versions` and `composer check` should also exclude this check.
To allow running `composer versions`, it is necessary to call `composer install` to install the (development) dependencies of this project. This may not be obvious to contributors unfamiliar with `composer'.
Fix#4213. Early versions of Php 8.4 caused problems for some Excel functions, among them ROUNDDOWN and ROUNDUP. New code was added which seemed to work for 8.4 and all prior releases (back to 7.4). However, as the issue shows, there is a problem with the new logic that had not been a problem for prior releases (PhpSpreadsheet 1.29.1 with Php 8.3 or earlier).
As it happens, some time after 8.4 broke the existing functionality, new features were added to it which enabled much cleaner logic. The code will now take this cleaner path when available, and revert to the older logic when not. This appears to work for all relevant Php releases, at least till the next non-match between PhpSpreadsheet and Excel is reported.
And, having made the change to ROUNDDOWN, it occurred to me that ROUNDDOWN always returns the same result as TRUNC (they differ only in number of required arguments). So I changed TRUNC to call ROUNDDOWN, and that didn't break anything. So I will keep that change. This probably means I should change Calculation so that ROUNDDOWN is called automatically, and deprecate TRUNC. That can happen at a later time.
Fix#4200. Fix#4145. Although the Xml is valid, Excel insists that worksheet.xml specifies `ignoredErrors` (introduced with 1.29.0) before `legacyDrawing` or `drawing`.
Fix#4197. Overlooked in the introduction of Dynamic Arrays, Data Validation can specify a list to be a result of the spill operator, which is implemented via the ANCHORARRAY function.
It appears that function `DataValidator::isValid` will not work if the list is specified in this manner, nor if it is specified as a defined name. Fixing those situations will be difficult (defined names probably easier than ANCHORARRAY), and there is no reason to delay this change waiting for those to be fixed. I will open a new issue when this PR is merged.
Fix#4201. Although that issue can be dealt with without any change to PhpSpreadsheet, it is pretty clear that `setLabelFont` has been accidentally omitted from Chart/Layout. Add it now. Xlsx Chart Writer is changed to use font name from labelFont if latin, eastAsian, or complexScript is uninitialized. Finally, chart label font size is multiplied by 100 in Xlsx Writer, as it is in Excel, but the corresponding division by 100 has been omitted from Xlsx Chart Reader - add that now.
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