gtk3.20: Fix gtk warning (#367)

* * Fix gtk warning.

* * Fix gtk warning (border-inner).

* * Fixed _text_shadow_color gtk warning.

* * Code style fix.

* * Code style fix 2...

gtk-3.20/scss/_functions.scss

@@ -77,3 +77,19 @@ $modules: () !default;
 
     &:active:disabled, &:checked:disabled { border-color: border_normal($color); }
 }
+
+@function _text_shadow_color($tc: $fg_color, $bg: $bg_color) {
+    //
+    // calculate the color of text shadows
+    //
+    // $tc is the text color
+    // $bg is the background color
+    //
+    $_lbg: lightness($bg) / 100%;
+
+    @if lightness($tc) < 50% {
+        @return transparentize(white, 1 - $_lbg / ($_lbg * 1.3));
+    } @else {
+        @return transparentize(black, $_lbg * .8);
+    }
+}

gtk-3.20/scss/widgets/_menu.scss

@@ -114,7 +114,7 @@
             }
 
             calendar {
-                &:inconsistent { color: mix($menu_fg_color, $menu_bg_color, .5); }
+                &:indeterminate { color: mix($menu_fg_color, $menu_bg_color, .5); }
 
                 .button {
                     border-style: none;

gtk-3.20/scss/widgets/_misc.scss

@@ -143,9 +143,6 @@
         }
 
         .button {
-
-            -GtkButton-inner-border: 0;
-
             border: 0;
             background-color: transparent;
             background-image: none;

gtk-3.20/scss/widgets/_view.scss

@@ -182,7 +182,7 @@
                         box-shadow: inset 0 1px transparentize(white, .95);
                     }
 
-                    background-color: linear-gradient(to bottom, $base_color, darken($base_color, .1));
+                    @include linear-gradient($selected_bg_color);
 
                     &:backdrop {
                         @if $variant == 'light' {
@@ -197,17 +197,9 @@
                 }
             }
 
-            /* transmission fix. */
-            &:insensitive {
-                &:insensitive {
-                    @include linear-gradient($bg_color);
-                    border-color: border_insensitive($bg_color);
-                }
-            }
-
             &:disabled {
                 @include linear-gradient($bg_color);
-                border-color: border_disabled($bg_color);
+                border-color: border_insensitive($bg_color);
             }
 
             &:backdrop {