[nautilus/revert-0009d0e7: 65/65] Revert "toolbar: Use GTK_STYLE_CLASS'es on the pathbar container box"

[António Fernandes <antoniof src gnome org>]

commit 171ae2ed5206c941f12df5d3f74bc7236f3efd94
Author: António Fernandes <antoniojpfernandes gmail com>
Date:   Wed Oct 10 00:54:08 2018 +0000

    Revert "toolbar: Use GTK_STYLE_CLASS'es on the pathbar container box"
    
    This reverts commit 0009d0e771f1a7cb9adf12e78d66aefcccc766b6
    
    That commit gave the pathbar a bounding frame under HighContrast.
    However, this 1px border is not consistent with button borders, and
    it lacks padding. The result is uglier than before the change.
    
    Furthermore, it may be the case that setting GTK_STYLE_CLASS_BACKGROUND
    and GTK_STYLE_CLASS_FRAME in a GtkBox is either meaningless or leads to
    unexpected styling.
    
    This change is neutral for Adwaita, so let's revert it.
    
    Fixes https://gitlab.gnome.org/GNOME/nautilus/issues/674

 src/nautilus-toolbar.c        | 8 +++-----
 src/resources/css/Adwaita.css | 6 ++++++
 2 files changed, 9 insertions(+), 5 deletions(-)
---
diff --git a/src/nautilus-toolbar.c b/src/nautilus-toolbar.c
index 12fc27a59..fb0d2d4c0 100644
--- a/src/nautilus-toolbar.c
+++ b/src/nautilus-toolbar.c
@@ -858,17 +858,15 @@ on_notify_width_maximized (NautilusContainerMaxWidth *container,
     context = gtk_widget_get_style_context (self->path_bar_container);
     width_maximized = nautilus_container_max_width_get_width_maximized (container);
 
-    g_return_if_fail (gtk_style_context_has_class (context, GTK_STYLE_CLASS_FRAME) != width_maximized);
+    g_return_if_fail (gtk_style_context_has_class (context, "width-maximized") != width_maximized);
 
     if (width_maximized)
     {
-        gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
-        gtk_style_context_add_class (context, GTK_STYLE_CLASS_BACKGROUND);
+        gtk_style_context_add_class (context, "width-maximized");
     }
     else
     {
-        gtk_style_context_remove_class (context, GTK_STYLE_CLASS_FRAME);
-        gtk_style_context_remove_class (context, GTK_STYLE_CLASS_BACKGROUND);
+        gtk_style_context_remove_class (context, "width-maximized");
     }
 }
 
diff --git a/src/resources/css/Adwaita.css b/src/resources/css/Adwaita.css
index ca7a3a9d4..b1e510903 100644
--- a/src/resources/css/Adwaita.css
+++ b/src/resources/css/Adwaita.css
@@ -65,8 +65,14 @@
 .path-bar-box {
   transition: border 200ms;
   transition: background-color 200ms;
+}
+.path-bar-box.width-maximized {
+  border: 1px @borders solid;
   border-radius: 3px;
 }
+.path-bar-box.width-maximized:not(:backdrop) {
+  background-color: @theme_bg_color;
+}
 
 /* Make the tags fit into the box */
 entry.search > * {