[nautilus] Add application-specific theme extensions

[Matthias Clasen <matthiasc src gnome org>]

commit 3fd7e847d531fbbfc4ebba24864bdd0f8b81c750
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Jul 10 08:57:27 2014 -0400

    Add application-specific theme extensions
    
    This used to live in gnome-themes-standard, but with the move
    of Adwaita to GTK+, it needs to find a new home.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=732995

 src/Adwaita.css            |   95 ++++++++++++++++++++++++++++++++++++++++++++
 src/nautilus-application.c |   52 ++++++++++++++++++++++++
 src/nautilus.gresource.xml |    1 +
 3 files changed, 148 insertions(+), 0 deletions(-)
---
diff --git a/src/Adwaita.css b/src/Adwaita.css
new file mode 100644
index 0000000..60003ff
--- /dev/null
+++ b/src/Adwaita.css
@@ -0,0 +1,95 @@
+.nautilus-canvas-item {
+    border-radius: 5px;
+}
+
+.nautilus-desktop.nautilus-canvas-item {
+    color: @theme_selected_fg_color;
+    text-shadow: 1px 1px black;
+}
+
+.nautilus-desktop.nautilus-canvas-item:active {
+    color: @theme_text_color;
+}
+
+.nautilus-desktop.nautilus-canvas-item:selected {
+    color: @theme_selected_fg_color;
+}
+
+.nautilus-desktop.nautilus-canvas-item:active,
+.nautilus-desktop.nautilus-canvas-item:prelight,
+.nautilus-desktop.nautilus-canvas-item:selected {
+    text-shadow: none;
+}
+
+.nautilus-desktop.nautilus-canvas-item:selected:backdrop {
+    color: @theme_unfocused_selected_fg_color;
+}
+
+NautilusWindow .sidebar .frame {
+    border-style: none;
+}
+
+NautilusWindow > GtkGrid > .pane-separator,
+NautilusWindow > GtkGrid > .pane-separator:hover {
+    border-width: 0 1px 0 0;
+    border-style: solid;
+    border-color: @borders;
+    background-color: @sidebar_bg;
+    color: shade (@theme_bg_color, 0.9);
+}
+
+NautilusWindow > GtkGrid > .pane-separator:backdrop,
+NautilusWindow > GtkGrid > .pane-separator:hover:backdrop {
+    border-color: @unfocused_borders;
+    background-color: @sidebar_bg_unfocused;
+}
+
+NautilusNotebook.notebook {
+    border-right-width: 0;
+    border-left-width: 0;
+    border-bottom-width: 0;
+}
+
+NautilusNotebook .frame {
+    border-width: 0;
+}
+
+NautilusToolbar .button {
+    icon-shadow: 0 1px @button_text_shadow;
+}
+
+NautilusToolbar .button:active {
+    icon-shadow: 0 1px @button_active_text_shadow;
+}
+
+NautilusToolbar .button:insensitive,
+NautilusToolbar .button:active *:insensitive {
+    icon-shadow: none;
+}
+
+NautilusQueryEditor .search-bar.toolbar {
+    border-top-width: 0;
+    border-bottom-width: 0;
+}
+
+NautilusQueryEditor .toolbar {
+    padding-top: 3px;
+    padding-bottom: 2px;
+
+    border-width: 1px 0 0 0;
+    border-style: solid;
+}
+
+NautilusQueryEditor .toolbar:nth-child(2) {
+    border-color: @borders;
+}
+
+NautilusQueryEditor .toolbar:last-child,
+NautilusQueryEditor .search-bar.toolbar:only-child {
+    border-bottom-width: 1px;
+    border-bottom-color: @borders;
+}
+
+NautilusQueryEditor .toolbar:backdrop:nth-child(2) {
+    border-color: @unfocused_borders;
+}
diff --git a/src/nautilus-application.c b/src/nautilus-application.c
index 7137d5e..88ed0f5 100644
--- a/src/nautilus-application.c
+++ b/src/nautilus-application.c
@@ -1154,6 +1154,56 @@ init_gtk_accels (void)
 }
 
 static void
+theme_changed (GtkSettings *settings)
+{
+       static GtkCssProvider *provider = NULL;
+       gchar *theme;
+       GdkScreen *screen;
+
+       g_object_get (settings, "gtk-theme-name", &theme, NULL);
+       screen = gdk_screen_get_default ();
+
+       if (g_str_equal (theme, "Adwaita"))
+       {
+               if (provider == NULL)
+               {
+                       GFile *file;
+
+                       provider = gtk_css_provider_new ();
+                       file = g_file_new_for_uri ("resource:///org/gnome/nautilus/Adwaita.css");
+                       gtk_css_provider_load_from_file (provider, file, NULL);
+                       g_object_unref (file);
+               }
+
+               gtk_style_context_add_provider_for_screen (screen,
+                                                          GTK_STYLE_PROVIDER (provider),
+                                                          GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
+       }
+       else if (provider != NULL)
+       {
+               gtk_style_context_remove_provider_for_screen (screen,
+                                                             GTK_STYLE_PROVIDER (provider));
+               g_clear_object (&provider);
+       }
+
+       g_free (theme);
+}
+
+static void
+setup_theme_extensions (void)
+{
+       GtkSettings *settings;
+
+       /* Set up a handler to load our custom css for Adwaita.
+        * See https://bugzilla.gnome.org/show_bug.cgi?id=732959
+        * for a more automatic solution that is still under discussion.
+        */
+       settings = gtk_settings_get_default ();
+       g_signal_connect (settings, "notify::gtk-theme-name", G_CALLBACK (theme_changed), NULL);
+       theme_changed (settings);
+}
+
+static void
 nautilus_application_startup (GApplication *app)
 {
        NautilusApplication *self = NAUTILUS_APPLICATION (app);
@@ -1167,6 +1217,8 @@ nautilus_application_startup (GApplication *app)
 
        gtk_window_set_default_icon_name ("system-file-manager");
 
+       setup_theme_extensions ();
+
        /* create DBus manager */
        self->priv->fdb_manager = nautilus_freedesktop_dbus_new ();
 
diff --git a/src/nautilus.gresource.xml b/src/nautilus.gresource.xml
index 15287d5..37a5bbf 100644
--- a/src/nautilus.gresource.xml
+++ b/src/nautilus.gresource.xml
@@ -12,5 +12,6 @@
     <file alias="icons/thumbnail_frame.png">../icons/thumbnail_frame.png</file>
     <file alias="icons/filmholes.png">../icons/filmholes.png</file>
     <file alias="icons/knob.png">../icons/knob.png</file>
+    <file>Adwaita.css</file>
   </gresource>
 </gresources>