[nautilus/gnome-3-30] toolbar: Use GTK_STYLE_CLASS'es on the pathbar container box



commit e35d708eddb4dd67f53ec6fd83b9de3286564b6a
Author: António Fernandes <antoniof gnome org>
Date:   Thu Sep 27 11:50:44 2018 +0000

    toolbar: Use GTK_STYLE_CLASS'es on the pathbar container box
    
    On wider windows, we show a border around the pathbar and fill it
    with background color using custom CSS specific for Adwaita.
    
    This means the pathbar is unbounded in HighContrast mode or 3rd party
    custom themes, giving the headerbar an uncentered, unbalanced layout.
    
    Fix that using the "frame" and "background" style class which are
    exposed by Gtk+ for this purpose.
    
    Closes: https://gitlab.gnome.org/GNOME/nautilus/issues/661
    
    
    (cherry picked from commit 0009d0e771f1a7cb9adf12e78d66aefcccc766b6)

 src/nautilus-toolbar.c        | 8 +++++---
 src/resources/css/Adwaita.css | 6 ------
 2 files changed, 5 insertions(+), 9 deletions(-)
---
diff --git a/src/nautilus-toolbar.c b/src/nautilus-toolbar.c
index fb0d2d4c0..12fc27a59 100644
--- a/src/nautilus-toolbar.c
+++ b/src/nautilus-toolbar.c
@@ -858,15 +858,17 @@ 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, "width-maximized") != width_maximized);
+    g_return_if_fail (gtk_style_context_has_class (context, GTK_STYLE_CLASS_FRAME) != width_maximized);
 
     if (width_maximized)
     {
-        gtk_style_context_add_class (context, "width-maximized");
+        gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
+        gtk_style_context_add_class (context, GTK_STYLE_CLASS_BACKGROUND);
     }
     else
     {
-        gtk_style_context_remove_class (context, "width-maximized");
+        gtk_style_context_remove_class (context, GTK_STYLE_CLASS_FRAME);
+        gtk_style_context_remove_class (context, GTK_STYLE_CLASS_BACKGROUND);
     }
 }
 
diff --git a/src/resources/css/Adwaita.css b/src/resources/css/Adwaita.css
index b1e510903..ca7a3a9d4 100644
--- a/src/resources/css/Adwaita.css
+++ b/src/resources/css/Adwaita.css
@@ -65,14 +65,8 @@
 .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 > * {


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