[gtksourceview] view: allow NULL out params for get_leading_trailing()

[SĂŠbastien Wilmet <swilmet src gnome org>]

commit 6cb189458cda2d0564038c009430fdde21f49fb4
Author: SĂŠbastien Wilmet <swilmet gnome org>
Date:   Sun Aug 16 19:25:35 2015 +0200

    view: allow NULL out params for get_leading_trailing()

 gtksourceview/gtksourceview.c |   69 +++++++++++++++++++++--------------------
 1 files changed, 35 insertions(+), 34 deletions(-)
---
diff --git a/gtksourceview/gtksourceview.c b/gtksourceview/gtksourceview.c
index ba41043..184ada5 100644
--- a/gtksourceview/gtksourceview.c
+++ b/gtksourceview/gtksourceview.c
@@ -2470,47 +2470,50 @@ get_leading_trailing (const GtkTextIter *iter,
                      GtkTextIter       *leading,
                      GtkTextIter       *trailing)
 {
-       g_assert (leading != NULL);
-       g_assert (trailing != NULL);
-
-       /* Find end of leading */
-       *leading = *iter;
-       gtk_text_iter_set_line_offset (leading, 0);
-
-       while (!gtk_text_iter_is_end (leading))
+       /* Find end of leading whitespaces */
+       if (leading != NULL)
        {
-               gunichar ch = gtk_text_iter_get_char (leading);
+               *leading = *iter;
+               gtk_text_iter_set_line_offset (leading, 0);
 
-               if (!g_unichar_isspace (ch))
+               while (!gtk_text_iter_is_end (leading))
                {
-                       break;
-               }
+                       gunichar ch = gtk_text_iter_get_char (leading);
 
-               gtk_text_iter_forward_char (leading);
-       }
+                       if (!g_unichar_isspace (ch))
+                       {
+                               break;
+                       }
 
-       /* Find start of trailing */
-       *trailing = *iter;
-       if (!gtk_text_iter_ends_line (trailing))
-       {
-               gtk_text_iter_forward_to_line_end (trailing);
+                       gtk_text_iter_forward_char (leading);
+               }
        }
 
-       while (!gtk_text_iter_starts_line (trailing))
+       /* Find start of trailing whitespaces */
+       if (trailing != NULL)
        {
-               GtkTextIter prev;
-               gunichar ch;
-
-               prev = *trailing;
-               gtk_text_iter_backward_char (&prev);
-
-               ch = gtk_text_iter_get_char (&prev);
-               if (!g_unichar_isspace (ch))
+               *trailing = *iter;
+               if (!gtk_text_iter_ends_line (trailing))
                {
-                       break;
+                       gtk_text_iter_forward_to_line_end (trailing);
                }
 
-               *trailing = prev;
+               while (!gtk_text_iter_starts_line (trailing))
+               {
+                       GtkTextIter prev;
+                       gunichar ch;
+
+                       prev = *trailing;
+                       gtk_text_iter_backward_char (&prev);
+
+                       ch = gtk_text_iter_get_char (&prev);
+                       if (!g_unichar_isspace (ch))
+                       {
+                               break;
+                       }
+
+                       *trailing = prev;
+               }
        }
 }
 
@@ -4069,7 +4072,6 @@ do_smart_backspace (GtkSourceView *view)
        GtkTextIter insert;
        GtkTextIter end;
        GtkTextIter leading;
-       GtkTextIter trailing;
        guint visual_column;
        gint indent_width;
 
@@ -4082,7 +4084,7 @@ do_smart_backspace (GtkSourceView *view)
        }
 
        /* If the line isn't empty up to our cursor, ignore. */
-       get_leading_trailing (&insert, &leading, &trailing);
+       get_leading_trailing (&insert, &leading, NULL);
        if (gtk_text_iter_compare (&leading, &insert) < 0)
        {
                return FALSE;
@@ -4154,7 +4156,6 @@ do_ctrl_backspace (GtkSourceView *view)
        GtkTextIter insert;
        GtkTextIter end;
        GtkTextIter leading;
-       GtkTextIter trailing;
        gboolean default_editable;
 
        buffer = GTK_TEXT_BUFFER (view->priv->source_buffer);
@@ -4180,7 +4181,7 @@ do_ctrl_backspace (GtkSourceView *view)
        /* If only leading whitespaces are on the left of the cursor, delete up
         * to the zero position.
         */
-       get_leading_trailing (&insert, &leading, &trailing);
+       get_leading_trailing (&insert, &leading, NULL);
        if (gtk_text_iter_compare (&insert, &leading) <= 0)
        {
                gtk_text_iter_set_line_offset (&insert, 0);