[gnome-flashback] screenshot: save to clipboard when filename is empty

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 86472c44364d5fd7fbc1ec8a3364e19855537189
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Tue Feb 18 21:42:26 2020 +0200

    screenshot: save to clipboard when filename is empty
    
    GNOME Settings Daemon no longer do this.
    
    https://gitlab.gnome.org/GNOME/gnome-settings-daemon/commit/41a84e315d865bff16fb45717d1ef0ee23c65f25

 configure.ac                                  |  1 +
 gnome-flashback/libscreenshot/gf-screenshot.c | 39 +++++++++++++++++++++++++++
 po/POTFILES.in                                |  1 +
 3 files changed, 41 insertions(+)
---
diff --git a/configure.ac b/configure.ac
index f42b205..05bfc3b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -234,6 +234,7 @@ PKG_CHECK_MODULES([SCREENSAVER], [
 PKG_CHECK_MODULES([SCREENSHOT], [
   gio-unix-2.0 >= $GLIB_REQUIRED
   gtk+-3.0 >= $GTK_REQUIRED
+  libcanberra-gtk3 >= $CANBERRA_REQUIRED
   x11
   xext
   xfixes
diff --git a/gnome-flashback/libscreenshot/gf-screenshot.c b/gnome-flashback/libscreenshot/gf-screenshot.c
index 2b73aa6..5bbdffb 100644
--- a/gnome-flashback/libscreenshot/gf-screenshot.c
+++ b/gnome-flashback/libscreenshot/gf-screenshot.c
@@ -22,6 +22,8 @@
 #include "config.h"
 #include "gf-screenshot.h"
 
+#include <canberra-gtk.h>
+#include <glib/gi18n.h>
 #include <gtk/gtk.h>
 #include <gdk/gdkx.h>
 #include <X11/extensions/shape.h>
@@ -249,6 +251,37 @@ screenshot_add_cursor (GdkPixbuf      *pixbuf,
     }
 }
 
+static void
+play_sound_effect (const char *event_id,
+                   const char *event_desc)
+{
+  ca_context *c;
+
+  c = ca_gtk_context_get ();
+
+  ca_context_play (c, 0,
+                   CA_PROP_EVENT_ID, event_id,
+                   CA_PROP_EVENT_DESCRIPTION, event_desc,
+                   CA_PROP_CANBERRA_CACHE_CONTROL, "permanent",
+                   NULL);
+}
+
+static void
+save_to_clipboard (GfScreenshot *self,
+                   GdkPixbuf    *pixbuf)
+{
+  GdkDisplay *display;
+  GtkClipboard *clipboard;
+
+  display = gdk_display_get_default ();
+  clipboard = gtk_clipboard_get_for_display (display, GDK_SELECTION_CLIPBOARD);
+
+  play_sound_effect ("screen-capture", _("Screenshot taken"));
+
+  gtk_clipboard_set_image (clipboard, pixbuf);
+  g_object_unref (pixbuf);
+}
+
 static gchar *
 get_unique_path (const gchar *path,
                  const gchar *filename)
@@ -325,6 +358,12 @@ save_screenshot (GfScreenshot  *screenshot,
   if (pixbuf == NULL)
     return FALSE;
 
+  if (filename_in == NULL || *filename_in == '\0')
+    {
+      save_to_clipboard (screenshot, pixbuf);
+      return TRUE;
+    }
+
   filename = get_filename (filename_in);
 
   creation_time = g_date_time_format (screenshot->datetime, "%c");
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 9186c3b..007044a 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -38,6 +38,7 @@ gnome-flashback/libpolkit/flashback-polkit-dialog.c
 gnome-flashback/libpolkit/flashback-polkit-dialog.ui
 gnome-flashback/libscreensaver/gf-auth.c
 gnome-flashback/libscreensaver/gf-unlock-dialog.c
+gnome-flashback/libscreenshot/gf-screenshot.c
 gvc/gvc/gvc-mixer-control.c
 system-indicators/si-bluetooth.c
 system-indicators/si-desktop-menu-item.c