[epiphany/wip/exalm/gtk4: 2/3] location-entry: Replace get_reader_mode_widget() with a signal

[Alexander Mikhaylenko <alexm src gnome org>]

commit 948a3298223ec2b2af605f9c20f8f9e1edadf800
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Tue Feb 22 13:11:38 2022 +0500

    location-entry: Replace get_reader_mode_widget() with a signal
    
    We don't need to expose widgetry for EphyLocationController to be able to
    interact with it. This will make GTK4 port easier.

 lib/widgets/ephy-location-entry.c | 34 ++++++++++++++++++++++++++++------
 lib/widgets/ephy-location-entry.h |  2 --
 src/ephy-location-controller.c    | 19 +++++++------------
 3 files changed, 35 insertions(+), 20 deletions(-)
---
diff --git a/lib/widgets/ephy-location-entry.c b/lib/widgets/ephy-location-entry.c
index ccb85da0f..036d5d592 100644
--- a/lib/widgets/ephy-location-entry.c
+++ b/lib/widgets/ephy-location-entry.c
@@ -104,6 +104,7 @@ enum {
 
 enum signalsEnum {
   USER_CHANGED,
+  READER_MODE_CHANGED,
   GET_LOCATION,
   GET_TITLE,
   LAST_SIGNAL
@@ -526,6 +527,22 @@ ephy_location_entry_class_init (EphyLocationEntryClass *klass)
                                         0,
                                         G_TYPE_NONE);
 
+  /**
+   * EphyLocationEntry::reader-mode-changed:
+   * @entry: the object on which the signal is emitted
+   * @active: whether reader mode is active
+   *
+   * Emitted when the user clicks the reader mode icon inside the
+   * #EphyLocationEntry.
+   *
+   */
+  signals[READER_MODE_CHANGED] = g_signal_new ("reader-mode-changed", G_OBJECT_CLASS_TYPE (klass),
+                                               G_SIGNAL_RUN_FIRST | G_SIGNAL_RUN_LAST,
+                                               0, NULL, NULL, NULL,
+                                               G_TYPE_NONE,
+                                               1,
+                                               G_TYPE_BOOLEAN);
+
   /**
    * EphyLocationEntry::get-location:
    * @entry: the object on which the signal is emitted
@@ -1029,6 +1046,15 @@ update_reader_icon (EphyLocationEntry *entry)
                                 name, GTK_ICON_SIZE_MENU);
 }
 
+static void
+reader_mode_clicked_cb (EphyLocationEntry *self)
+{
+  self->reader_mode_active = !self->reader_mode_active;
+
+  g_signal_emit (G_OBJECT (self), signals[READER_MODE_CHANGED], 0,
+                 self->reader_mode_active);
+}
+
 static void
 ephy_location_entry_construct_contents (EphyLocationEntry *entry)
 {
@@ -1097,6 +1123,8 @@ ephy_location_entry_construct_contents (EphyLocationEntry *entry)
   gtk_widget_set_tooltip_text (entry->reader_mode_button, _("Toggle reader mode"));
   entry->reader_mode_icon = gtk_button_get_image (GTK_BUTTON (entry->reader_mode_button));
   gtk_box_pack_start (GTK_BOX (box), entry->reader_mode_button, FALSE, TRUE, 0);
+  g_signal_connect_swapped (entry->reader_mode_button, "clicked",
+                            G_CALLBACK (reader_mode_clicked_cb), entry);
 
   context = gtk_widget_get_style_context (entry->reader_mode_icon);
   gtk_style_context_add_class (context, "entry_icon");
@@ -1452,12 +1480,6 @@ ephy_location_entry_get_entry (EphyLocationEntry *entry)
   return GTK_WIDGET (entry->url_entry);
 }
 
-GtkWidget *
-ephy_location_entry_get_reader_mode_widget (EphyLocationEntry *entry)
-{
-  return entry->reader_mode_button;
-}
-
 void
 ephy_location_entry_set_reader_mode_visible (EphyLocationEntry *entry,
                                              gboolean           visible)
diff --git a/lib/widgets/ephy-location-entry.h b/lib/widgets/ephy-location-entry.h
index da8fdc79c..516ca9a1f 100644
--- a/lib/widgets/ephy-location-entry.h
+++ b/lib/widgets/ephy-location-entry.h
@@ -61,8 +61,6 @@ void            ephy_location_entry_show_add_bookmark_popover  (EphyLocationEntr
 
 GtkWidget      *ephy_location_entry_get_entry                  (EphyLocationEntry *entry);
 
-GtkWidget      *ephy_location_entry_get_reader_mode_widget     (EphyLocationEntry *entry);
-
 void            ephy_location_entry_set_reader_mode_visible    (EphyLocationEntry *entry,
                                                                 gboolean           visible);
 
diff --git a/src/ephy-location-controller.c b/src/ephy-location-controller.c
index b9d37ae19..31370aac8 100644
--- a/src/ephy-location-controller.c
+++ b/src/ephy-location-controller.c
@@ -314,21 +314,16 @@ longpress_gesture_cb (GtkGestureLongPress *gesture,
 }
 
 static void
-reader_mode_button_clicked_cb (GtkButton *button,
-                               gpointer   user_data)
+reader_mode_changed_cb (EphyLocationEntry *lentry,
+                        gboolean           active,
+                        gpointer           user_data)
 {
   EphyLocationController *controller = EPHY_LOCATION_CONTROLLER (user_data);
   EphyWindow *window = controller->window;
   EphyEmbed *embed = ephy_embed_container_get_active_child (EPHY_EMBED_CONTAINER (window));
   EphyWebView *view = ephy_embed_get_web_view (embed);
-  EphyLocationEntry *lentry;
 
-  g_assert (EPHY_IS_LOCATION_ENTRY (controller->title_widget));
-
-  lentry = EPHY_LOCATION_ENTRY (controller->title_widget);
-
-  ephy_location_entry_set_reader_mode_state (lentry, !ephy_location_entry_get_reader_mode_state (lentry));
-  ephy_web_view_toggle_reader_mode (view, ephy_location_entry_get_reader_mode_state (lentry));
+  ephy_web_view_toggle_reader_mode (view, active);
 }
 
 static void
@@ -339,7 +334,7 @@ ephy_location_controller_constructed (GObject *object)
   EphyBookmarksManager *bookmarks_manager;
   EphySuggestionModel *model;
   EphyTabView *tab_view;
-  GtkWidget *widget, *reader_mode, *entry;
+  GtkWidget *widget, *entry;
 
   G_OBJECT_CLASS (ephy_location_controller_parent_class)->constructed (object);
 
@@ -370,8 +365,8 @@ ephy_location_controller_constructed (GObject *object)
   dzl_suggestion_entry_set_model (DZL_SUGGESTION_ENTRY (entry), G_LIST_MODEL (model));
   g_object_unref (model);
 
-  reader_mode = ephy_location_entry_get_reader_mode_widget (EPHY_LOCATION_ENTRY (controller->title_widget));
-  g_signal_connect (G_OBJECT (reader_mode), "clicked", G_CALLBACK (reader_mode_button_clicked_cb), 
controller);
+  g_signal_connect (controller->title_widget, "reader-mode-changed",
+                    G_CALLBACK (reader_mode_changed_cb), controller);
 
   g_object_bind_property (controller, "editable",
                           entry, "editable",