add hook for changing image in picture dialog

data/yad.1

@@ -867,6 +867,9 @@ Set increment value for scaling image.
 .TP
 .B \-\-filename=\fIFILENAME\fP
 Set picture filename. If no file name is specified extra data will be used. In this case several filenames can be specified.
+.TP
+.B \-\-image-changed=\fICMD\fP
+Set command which runs after changing image. Argument of a command is a filename of current image. Argument can be specified by '\fI%s\fP' pattern or will be the last part of a command.
 .PP
 Some actions on a picture like navigation, scaling or rotating available from popup menu. Those actions can be made only on static images.
 

src/option.c

@@ -562,6 +562,8 @@ static GOptionEntry picture_options[] = {
     N_("Set initial size (fit or orig)"), N_("TYPE") },
   { "inc", 0, 0, G_OPTION_ARG_INT, &options.picture_data.inc,
     N_("Set increment for picture scaling (default - 5)"), N_("NUMBER") },
+  { "image-changed", 0, 0, G_OPTION_ARG_STRING, &options.picture_data.change_cmd,
+    N_("Set action on image changing"), "CMD" },
   { NULL }
 };
 
@@ -1824,6 +1826,7 @@ yad_options_init (void)
   /* Initialize picture data */
   options.picture_data.size = YAD_PICTURE_ORIG;
   options.picture_data.inc = 5;
+  options.picture_data.change_cmd = NULL;
 
   /* Initialize print data */
   options.print_data.type = YAD_PRINT_TEXT;

src/picture.c

@@ -81,6 +81,25 @@ load_picture ()
 }
 
 static void
+img_changed_hook ()
+{
+  gchar *qfn, *cmd = NULL;
+
+  if (options.picture_data.change_cmd == NULL)
+    return;
+
+  qfn = g_shell_quote (img->filename);
+  if (g_strstr_len (options.picture_data.change_cmd, -1, "%s") != NULL)
+    cmd = g_strdup_printf (options.picture_data.change_cmd, qfn);
+  else
+    cmd = g_strdup_printf ("%s '%s'", options.picture_data.change_cmd, qfn);
+  g_free (qfn);
+
+  run_command_async (cmd);
+  g_free (cmd);
+}
+
+static void
 next_img_cb (GtkWidget *w, gpointer d)
 {
   lp = g_list_next (lp);
@@ -92,6 +111,7 @@ next_img_cb (GtkWidget *w, gpointer d)
   load_picture ();
   if (options.picture_data.size == YAD_PICTURE_FIT)
     picture_fit_to_window ();
+  img_changed_hook ();
 }
 
 static void
@@ -106,6 +126,7 @@ prev_img_cb (GtkWidget *w, gpointer d)
   load_picture ();
   if (options.picture_data.size == YAD_PICTURE_FIT)
     picture_fit_to_window ();
+  img_changed_hook ();
 }
 
 static void
@@ -118,6 +139,7 @@ first_img_cb (GtkWidget *w, gpointer d)
   load_picture ();
   if (options.picture_data.size == YAD_PICTURE_FIT)
     picture_fit_to_window ();
+  img_changed_hook ();
 }
 
 static void
@@ -130,6 +152,7 @@ last_img_cb (GtkWidget *w, gpointer d)
   load_picture ();
   if (options.picture_data.size == YAD_PICTURE_FIT)
     picture_fit_to_window ();
+  img_changed_hook ();
 }
 
 void

src/yad.h

@@ -428,6 +428,7 @@ typedef struct {
 
 typedef struct {
   YadPictureType size;
+  gchar *change_cmd;
   gint inc;
 } YadPictureData;