[tepl] App: add option to handle GApplication::open

[Sébastien Wilmet <swilmet src gnome org>]

commit d78983995ae9aa15184c474e65f9b8c3acf4364a
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue Oct 10 16:05:44 2017 +0200

    App: add option to handle GApplication::open

 docs/reference/tepl-3.0-sections.txt |    1 +
 tepl/tepl-application.c              |   81 ++++++++++++++++++++++++++++++++++
 tepl/tepl-application.h              |    2 +
 3 files changed, 84 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/tepl-3.0-sections.txt b/docs/reference/tepl-3.0-sections.txt
index 7f978ee..67dac21 100644
--- a/docs/reference/tepl-3.0-sections.txt
+++ b/docs/reference/tepl-3.0-sections.txt
@@ -198,6 +198,7 @@ tepl_application_get_app_action_info_store
 tepl_application_get_tepl_action_info_store
 tepl_application_get_active_main_window
 tepl_application_open_simple
+tepl_application_handle_open
 <SUBSECTION Standard>
 TEPL_APPLICATION
 TEPL_APPLICATION_CLASS
diff --git a/tepl/tepl-application.c b/tepl/tepl-application.c
index 4a9f3b2..915e2f5 100644
--- a/tepl/tepl-application.c
+++ b/tepl/tepl-application.c
@@ -20,6 +20,7 @@
 #include "config.h"
 #include "tepl-application.h"
 #include <glib/gi18n-lib.h>
+#include "tepl-abstract-factory.h"
 #include "tepl-application-window.h"
 
 /**
@@ -40,6 +41,8 @@ struct _TeplApplicationPrivate
        GtkApplication *gtk_app;
        AmtkActionInfoStore *app_action_info_store;
        AmtkActionInfoStore *tepl_action_info_store;
+
+       guint handle_open : 1;
 };
 
 enum
@@ -372,4 +375,82 @@ tepl_application_open_simple (TeplApplication *tepl_app,
        g_application_open (G_APPLICATION (tepl_app->priv->gtk_app), files, 1, "");
 }
 
+static void
+open_cb (GApplication     *g_app,
+        GFile           **files,
+        gint              n_files,
+        const gchar      *hint,
+        TeplApplication  *tepl_app)
+{
+       GtkApplicationWindow *main_window;
+       TeplApplicationWindow *tepl_window;
+       gint i;
+
+       if (n_files < 1)
+       {
+               return;
+       }
+
+       main_window = tepl_application_get_active_main_window (tepl_app);
+
+       if (main_window == NULL)
+       {
+               TeplAbstractFactory *factory;
+
+               factory = tepl_abstract_factory_get_singleton ();
+               main_window = tepl_abstract_factory_create_main_window (factory, tepl_app->priv->gtk_app);
+               g_return_if_fail (main_window != NULL);
+
+               gtk_widget_show (GTK_WIDGET (main_window));
+       }
+
+       tepl_window = tepl_application_window_get_from_gtk_application_window (main_window);
+
+       /* TODO: improve this, currently all the files are open at the same time
+        * in parallel, it would be better to open them sequentially, and jump
+        * only to the first one. Maybe by writing a MultiFileLoader class:
+        * 1. Create all the tabs, jump only to the first one.
+        * 2. Set locations.
+        * 3. Set editable=FALSE on all those views (+ set tab state/locking?).
+        * 4. Load the files one by one. Needs an async/finish API to load one
+        *    file.
+        */
+       for (i = 0; i < n_files; i++)
+       {
+               GFile *cur_file = files[i];
+
+               tepl_application_window_open_file (tepl_window, cur_file);
+       }
+}
+
+/**
+ * tepl_application_handle_open:
+ * @tepl_app: a #TeplApplication.
+ *
+ * Connects a generic function handler for the #GApplication::open signal.
+ *
+ * It calls tepl_application_window_open_file() for each #GFile to open, on the
+ * active main window as returned by tepl_application_get_active_main_window().
+ * If the active main window is %NULL, it creates one with
+ * tepl_abstract_factory_create_main_window().
+ *
+ * Since: 3.2
+ */
+void
+tepl_application_handle_open (TeplApplication *tepl_app)
+{
+       g_return_if_fail (TEPL_IS_APPLICATION (tepl_app));
+
+       if (!tepl_app->priv->handle_open)
+       {
+               g_signal_connect_object (tepl_app->priv->gtk_app,
+                                        "open",
+                                        G_CALLBACK (open_cb),
+                                        tepl_app,
+                                        0);
+
+               tepl_app->priv->handle_open = TRUE;
+       }
+}
+
 /* ex:set ts=8 noet: */
diff --git a/tepl/tepl-application.h b/tepl/tepl-application.h
index 2ed7c7e..cc6e530 100644
--- a/tepl/tepl-application.h
+++ b/tepl/tepl-application.h
@@ -71,6 +71,8 @@ GtkApplicationWindow *        tepl_application_get_active_main_window         
(TeplApplication
 void                   tepl_application_open_simple                    (TeplApplication *tepl_app,
                                                                         GFile           *file);
 
+void                   tepl_application_handle_open                    (TeplApplication *tepl_app);
+
 G_END_DECLS
 
 #endif /* TEPL_APPLICATION_H */