[latexila] Override some CSS properties for Adwaita

[Sébastien Wilmet <swilmet src gnome org>]

commit 4da5ea288d5e443c89a542b5a558fc180b09a8f4
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue Aug 19 21:24:06 2014 +0200

    Override some CSS properties for Adwaita

 src/latexila.gresource.xml  |    4 ++++
 src/latexila.vala           |   41 +++++++++++++++++++++++++++++++++++++++++
 src/main_window.vala        |    3 +++
 src/ui/latexila.adwaita.css |    3 +++
 4 files changed, 51 insertions(+), 0 deletions(-)
---
diff --git a/src/latexila.gresource.xml b/src/latexila.gresource.xml
index 0f55e5f..1491956 100644
--- a/src/latexila.gresource.xml
+++ b/src/latexila.gresource.xml
@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
 <gresources>
+  <gresource prefix="/org/gnome/latexila">
+    <file>ui/latexila.adwaita.css</file>
+  </gresource>
+
   <gresource prefix="/org/gnome/latexila/stock-icons">
     <!--
     List of icons that are registered as new stock icons, so it can be used
diff --git a/src/latexila.vala b/src/latexila.vala
index fc42a6b..154794a 100644
--- a/src/latexila.vala
+++ b/src/latexila.vala
@@ -21,6 +21,8 @@
 
 public class Latexila : Gtk.Application
 {
+    static Gtk.CssProvider? _provider = null;
+
     public Latexila ()
     {
         Object (application_id: "org.gnome.latexila");
@@ -107,6 +109,7 @@ public class Latexila : Gtk.Application
         hold ();
         set_application_icons ();
         new StockIcons ();
+        setup_theme_extensions ();
 
         AppSettings.get_default ();
         create_window ();
@@ -139,6 +142,44 @@ public class Latexila : Gtk.Application
         Gtk.Window.set_default_icon_list ((owned) list);
     }
 
+    private void setup_theme_extensions ()
+    {
+        Gtk.Settings settings = Gtk.Settings.get_default ();
+        settings.notify["gtk-theme-name"].connect (update_theme);
+        update_theme ();
+    }
+
+    private void update_theme ()
+    {
+        Gtk.Settings settings = Gtk.Settings.get_default ();
+        Gdk.Screen screen = Gdk.Screen.get_default ();
+
+        if (settings.gtk_theme_name == "Adwaita")
+        {
+            if (_provider == null)
+            {
+                _provider = new Gtk.CssProvider ();
+                File file = File.new_for_uri ("resource:///org/gnome/latexila/ui/latexila.adwaita.css");
+                try
+                {
+                    _provider.load_from_file (file);
+                }
+                catch (Error e)
+                {
+                    warning ("Cannot load CSS: %s", e.message);
+                }
+            }
+
+            Gtk.StyleContext.add_provider_for_screen (screen, _provider,
+                Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION);
+        }
+        else if (_provider != null)
+        {
+            Gtk.StyleContext.remove_provider_for_screen (screen, _provider);
+            _provider = null;
+        }
+    }
+
     private void reopen_files ()
     {
         GLib.Settings editor_settings =
diff --git a/src/main_window.vala b/src/main_window.vala
index d088542..2f43880 100644
--- a/src/main_window.vala
+++ b/src/main_window.vala
@@ -371,6 +371,9 @@ public class MainWindow : Window
         Toolbar edit_toolbar = _ui_manager.get_widget ("/EditToolbar") as Toolbar;
         edit_toolbar.set_style (ToolbarStyle.ICONS);
 
+        StyleContext context = edit_toolbar.get_style_context ();
+        context.add_class ("latexila-edit-toolbar");
+
         edit_toolbar.show_all ();
 
         ToggleAction action =
diff --git a/src/ui/latexila.adwaita.css b/src/ui/latexila.adwaita.css
new file mode 100644
index 0000000..4c8e071
--- /dev/null
+++ b/src/ui/latexila.adwaita.css
@@ -0,0 +1,3 @@
+.primary-toolbar .button, .latexila-edit-toolbar .button {
+    padding: 2px;
+}