RTLIT css padding rtl正则表达式

Question

RTLIT ruby tool is used to switch from LTR to RTL in css files, but it doesn't also change the padding,margin left to righ for example :

https://github.com/zohararad/rtlit/blob/master/lib/rtlit/converter.rb

padding: 1px 2px;
padding: 0 2px 4px;
padding: 1px 0 3px 4px;
padding: 1px 2px 0 4px;
padding: 1px 2px 3px 0;

need to change this values to be :

padding: 1px 2px;
padding: 0 0 4px 2px;
padding: 1px 4px 3px 0;
padding: 1px 4px 0 2px;
padding: 1px 0 3px 2px;

we need to switch always the second value with the 4th value and if they are only 3 switch the second value to the forth and set the second to 0

also if there are only 2 values , leave it as it is.

I need that regular expression in ruby or php

Answer 1

try this in php:

$result = preg_replace ('~\b(?:padding|margin)\b\h*:\h*\K(-?\d+[a-z%]*)\h+(-?\d+[a-z%]*)\h+(-?\d+[a-z%]*)\h+(-?\d+[a-z%]*)\h*(?=;)~i', '$1 $4 $3 $2', $string);

with ruby:

my_result = my_str.sub( %r{(?i)\b(padding|margin)\b *: *(-?\d+[a-z%]*) +(-?\d+[a-z%]*) +(-?\d+[a-z%]*) +(-?\d+[a-z%]*) *(?=;)}, '$1: $2 $5 $4 $3')