[gnome-shell/wip/snwh/corner-ripple-css: 7/7] theme: Replace corner ripple png assets with css

[Florian Müllner <fmuellner src gnome org>]

commit 8e7c90b930fd6bd52bfc0976d6e0750a48219cb4
Author: Sam Hewitt <sam snwh org>
Date:   Fri Nov 16 14:05:05 2018 -0500

    theme: Replace corner ripple png assets with css
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/298

 data/gnome-shell-theme.gresource.xml     |   2 --
 data/theme/corner-ripple-ltr.png         | Bin 2493 -> 0 bytes
 data/theme/corner-ripple-rtl.png         | Bin 2386 -> 0 bytes
 data/theme/gnome-shell-sass/_common.scss |  11 +++++------
 4 files changed, 5 insertions(+), 8 deletions(-)
---
diff --git a/data/gnome-shell-theme.gresource.xml b/data/gnome-shell-theme.gresource.xml
index c99b71ddf..e292d33a3 100644
--- a/data/gnome-shell-theme.gresource.xml
+++ b/data/gnome-shell-theme.gresource.xml
@@ -11,8 +11,6 @@
     <file>close-window.svg</file>
     <file>close-window-active.svg</file>
     <file>close-window-hover.svg</file>
-    <file>corner-ripple-ltr.png</file>
-    <file>corner-ripple-rtl.png</file>
     <file>dash-placeholder.svg</file>
     <file>gnome-shell.css</file>
     <file>gnome-shell-high-contrast.css</file>
diff --git a/data/theme/gnome-shell-sass/_common.scss b/data/theme/gnome-shell-sass/_common.scss
index 06c50d1d9..829791419 100644
--- a/data/theme/gnome-shell-sass/_common.scss
+++ b/data/theme/gnome-shell-sass/_common.scss
@@ -1142,17 +1142,16 @@ StScrollBar {
     & > StIcon { icon-size: 16px; }
   }
 
-//Activities Ripples
+// Activities Ripples
 .ripple-box {
   width: 52px;
   height: 52px;
-  background-image: url("resource:///org/gnome/shell/theme/corner-ripple-ltr.png");
-  background-size: contain;
+  border-radius: 0 0 52px 0; // radius the size of the box give us the curve
+  background-color: lighten(transparentize($selected_bg_color, 0.7), 40%);
+  box-shadow: 0 0 2px 2px lighten($selected_bg_color, 20%);
 }
 
-.ripple-box:rtl {
-  background-image: url("resource:///org/gnome/shell/theme/corner-ripple-rtl.png");
-}
+.ripple-box:rtl { border-radius: 0 0 0 52px; } // just a simple change to the border radius position
 
 // not really top bar only
 .popup-menu-arrow { width: 16px; height: 16px; }