[libadwaita/wip/snwh/linked-button-fixes] buttons: fix linked flat button radii

[Sam Hewitt <snwh src gnome org>]

commit 6d3b6cbdb65c8c03d2420b77cc87779158843d7b
Author: Sam Hewitt <sam snwh org>
Date:   Fri Nov 12 10:54:44 2021 -0330

    buttons: fix linked flat button radii

 src/stylesheet/widgets/_buttons.scss | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
---
diff --git a/src/stylesheet/widgets/_buttons.scss b/src/stylesheet/widgets/_buttons.scss
index 524a8a7a..7cf004de 100644
--- a/src/stylesheet/widgets/_buttons.scss
+++ b/src/stylesheet/widgets/_buttons.scss
@@ -238,6 +238,7 @@ button {
       &:active,
       &:checked {
         box-shadow: inset 0 0 0 1px $border_color;
+        > * {transform: none;}
       }
     }
 
@@ -392,6 +393,7 @@ button.outline {
 
   @if $contrast == 'high' {
     box-shadow: inset 0 0 0 1px $border_color;
+    > * {transform: none;}
   }
   @else {
     box-shadow: inset 0 0 0 1px gtkalpha(currentColor, .15);
@@ -569,6 +571,21 @@ splitbutton {
         > * {transform: translateY(1px);}
       }
     }
+    
+    // Reimplementing linked so we don't blow up css
+    > button:dir(ltr),
+    > menubutton > button:dir(rtl) {
+      border-top-right-radius: 0;
+      border-bottom-right-radius: 0;
+      margin-right: -1px;
+    }
+
+    > button:dir(rtl),
+    > menubutton > button:dir(ltr) {
+      border-top-left-radius: 0;
+      border-bottom-left-radius: 0;
+      margin-left: -1px;
+    }
   }
 
   &.outline {