feat(tokens): Negative minimum length adds right padding (#2801)

* negative minimum length adds right padding

* missing else statement

* updated changelog

CHANGELOG.md

@@ -30,6 +30,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 - `internal/fs`: Use `/` as a fallback if no mountpoints are specified ([`#2572`](https://github.com/polybar/polybar/issues/2572), [`#2705`](https://github.com/polybar/polybar/pull/2705))
 - `internal/backlight`: Detect backlight if none specified ([`#2572`](https://github.com/polybar/polybar/issues/2572), [`#2728`](https://github.com/polybar/polybar/pull/2728))
+- Providing a negative min-width to a token adds right-padding ([`#2789`](https://github.com/polybar/polybar/issues/2789), [`#2801`](https://github.com/polybar/polybar/pull/2801)) by [@VanillaViking](https://github.com/VanillaViking).
 
 ### Fixed
 - Waiting for double click interval on modules that don't have a double click action ([`#2663`](https://github.com/polybar/polybar/issues/2663), [`#2695`](https://github.com/polybar/polybar/pull/2695))

include/drawtypes/label.hpp

@@ -16,6 +16,7 @@ namespace drawtypes {
     size_t max{0_z};
     string suffix{""s};
     bool zpad{false};
+    bool rpadding{false};
   };
 
   class label : public non_copyable_mixin {

src/drawtypes/label.cpp

@@ -86,7 +86,11 @@ namespace drawtypes {
         if (tok.max != 0_z && string_util::char_len(repl) > tok.max) {
           repl = string_util::utf8_truncate(std::move(repl), tok.max) + tok.suffix;
         } else if (tok.min != 0_z && repl.length() < tok.min) {
-          repl.insert(0_z, tok.min - repl.length(), tok.zpad ? '0' : ' ');
+          if (tok.rpadding) {
+            repl.append(tok.min - repl.length(), ' ');
+          } else {
+            repl.insert(0_z, tok.min - repl.length(), tok.zpad ? '0' : ' ');
+          }
         }
 
         /*
@@ -231,6 +235,10 @@ namespace drawtypes {
       text = string_util::replace(text, token_str, token.token);
 
       try {
+        if (token_str[pos + 1] == '-') {
+          token.rpadding = true;
+          pos++;
+        }
         token.min = std::stoul(&token_str[pos + 1], nullptr, 10);
         // When the number starts with 0 the string is 0-padded
         token.zpad = token_str[pos + 1] == '0';