[epiphany] Track the currently committed address

[Gustavo Noronha Silva <gns src gnome org>]

commit 34216ae096a296e29c5176a704f076434214d1ed
Author: Gustavo Noronha Silva <gns gnome org>
Date:   Sat Oct 7 11:47:00 2017 -0300

    Track the currently committed address
    
    While doing a load, some policy decisions may depend on where we are coming
    from. Both WebKitWebView's uri and EphyWebView's address change even for ongoing
    loads, so we track the last committed uri.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=788845

 embed/ephy-web-view.c |   21 +++++++++++++++++++++
 embed/ephy-web-view.h |    1 +
 2 files changed, 22 insertions(+), 0 deletions(-)
---
diff --git a/embed/ephy-web-view.c b/embed/ephy-web-view.c
index b6ad010..77f688a 100644
--- a/embed/ephy-web-view.c
+++ b/embed/ephy-web-view.c
@@ -80,6 +80,7 @@ struct _EphyWebView {
   guint history_frozen : 1;
   guint ever_committed : 1;
 
+  char *last_committed_address;
   char *address;
   char *display_address;
   char *typed_address;
@@ -923,6 +924,7 @@ ephy_web_view_finalize (GObject *object)
 
   ephy_web_view_popups_manager_reset (view);
 
+  g_free (view->last_committed_address);
   g_free (view->address);
   g_free (view->display_address);
   g_free (view->typed_address);
@@ -1680,6 +1682,9 @@ ephy_web_view_set_committed_location (EphyWebView *view,
     ephy_web_view_set_loading_message (view, location);
   }
 
+  g_clear_pointer (&view->last_committed_address, g_free);
+  view->last_committed_address = g_strdup (ephy_web_view_get_address (view));
+
   ephy_web_view_set_link_message (view, NULL);
 
   _ephy_web_view_update_icon (view);
@@ -2788,6 +2793,22 @@ ephy_web_view_get_address (EphyWebView *view)
 }
 
 /**
+ * ephy_web_view_get_last_committed_address:
+ * @view: an #EphyWebView
+ *
+ * Returns the address of the last committed page, percent-encoded.
+ * This URI should not be displayed to the user; to do that, use
+ * ephy_web_view_get_display_address().
+ *
+ * Return value: @view's address. Will never be %NULL.
+ **/
+const char *
+ephy_web_view_get_last_committed_address (EphyWebView *view)
+{
+  return view->last_committed_address ? view->last_committed_address : "about:blank";
+}
+
+/**
  * ephy_web_view_get_display_address:
  * @view: an #EphyWebView
  *
diff --git a/embed/ephy-web-view.h b/embed/ephy-web-view.h
index 765a27f..b4a3df3 100644
--- a/embed/ephy-web-view.h
+++ b/embed/ephy-web-view.h
@@ -109,6 +109,7 @@ void                       ephy_web_view_get_security_level       (EphyWebView
                                                                    GTlsCertificateFlags      *errors);
 void                       ephy_web_view_print                    (EphyWebView               *view);
 const char *               ephy_web_view_get_address              (EphyWebView               *view);
+const char *             ephy_web_view_get_last_committed_address (EphyWebView               *view);
 const char *               ephy_web_view_get_display_address      (EphyWebView               *view);
 void                       ephy_web_view_set_placeholder          (EphyWebView               *view,
                                                                    const char                *uri,