[epiphany] Hide action bar in fullscreen narrow mode

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 44a05555e4376b534819fda7b6eb4f1fce8c85cb
Author: Jan-Michael Brummer <jan brummer tabos org>
Date:   Fri Jul 10 21:50:55 2020 +0200

    Hide action bar in fullscreen narrow mode
    
    Fixes: https://gitlab.gnome.org/GNOME/epiphany/-/issues/813

 meson.build           |  2 +-
 src/ephy-action-bar.c | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 4c9b8d353..ca7c2d78d 100644
--- a/meson.build
+++ b/meson.build
@@ -91,7 +91,7 @@ gtk_unix_print_dep = dependency('gtk+-unix-print-3.0', version: gtk_requirement)
 hogweed_dep = dependency('hogweed', version: nettle_requirement)
 iso_codes_dep = dependency('iso-codes', version: '>= 0.35')
 json_glib_dep = dependency('json-glib-1.0', version: '>= 1.2.4')
-libdazzle_dep = dependency('libdazzle-1.0', version: '>= 3.35.3')
+libdazzle_dep = dependency('libdazzle-1.0', version: '>= 3.37.1')
 libhandy_dep = dependency('libhandy-1', version: '>= 0.83.0')
 libsecret_dep = dependency('libsecret-1', version: '>= 0.19.0')
 libsoup_dep = dependency('libsoup-2.4', version: '>= 2.48.0')
diff --git a/src/ephy-action-bar.c b/src/ephy-action-bar.c
index 396c97bd0..80a29b3bf 100644
--- a/src/ephy-action-bar.c
+++ b/src/ephy-action-bar.c
@@ -102,6 +102,25 @@ ephy_action_bar_get_property (GObject    *object,
   }
 }
 
+static void
+titlebar_animation_changed (EphyActionBar *action_bar)
+{
+  switch (dzl_application_window_get_titlebar_animation (DZL_APPLICATION_WINDOW (action_bar->window))) {
+    case DZL_TITLEBAR_ANIMATION_SHOWN:
+      gtk_widget_set_visible (GTK_WIDGET (action_bar), TRUE);
+      break;
+    case DZL_TITLEBAR_ANIMATION_SHOWING:
+      gtk_revealer_set_reveal_child (GTK_REVEALER (action_bar), TRUE);
+      break;
+    case DZL_TITLEBAR_ANIMATION_HIDING:
+      gtk_revealer_set_reveal_child (GTK_REVEALER (action_bar), FALSE);
+      break;
+    case DZL_TITLEBAR_ANIMATION_HIDDEN:
+      gtk_widget_set_visible (GTK_WIDGET (action_bar), FALSE);
+      break;
+  }
+}
+
 static void
 ephy_action_bar_constructed (GObject *object)
 {
@@ -121,6 +140,9 @@ ephy_action_bar_constructed (GObject *object)
   g_signal_connect_object (action_bar->notebook, "page-removed",
                            G_CALLBACK (update_pages_button), action_bar,
                            G_CONNECT_SWAPPED);
+  g_signal_connect_object (DZL_APPLICATION_WINDOW (action_bar->window), "notify::titlebar-animation",
+                           G_CALLBACK (titlebar_animation_changed), action_bar,
+                           G_CONNECT_SWAPPED);
 }
 
 static void
@@ -176,6 +198,7 @@ ephy_action_bar_init (EphyActionBar *action_bar)
 
   ephy_action_bar_start_set_adaptive_mode (action_bar->action_bar_start,
                                            EPHY_ADAPTIVE_MODE_NARROW);
+  titlebar_animation_changed (action_bar);
 }
 
 EphyActionBar *