[gtksourceview] SpaceDrawer: have iter variable instead of using 'start' as iterator

[Sébastien Wilmet <swilmet src gnome org>]

commit 27b1783366a225d82adedf01978cba009feb57e3
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Jul 23 08:43:55 2016 +0200

    SpaceDrawer: have iter variable instead of using 'start' as iterator
    
    Use a variable for only one purpose.

 gtksourceview/gtksourcespacedrawer.c |   33 ++++++++++++++++++---------------
 1 files changed, 18 insertions(+), 15 deletions(-)
---
diff --git a/gtksourceview/gtksourcespacedrawer.c b/gtksourceview/gtksourcespacedrawer.c
index de1329a..7420c86 100644
--- a/gtksourceview/gtksourcespacedrawer.c
+++ b/gtksourceview/gtksourcespacedrawer.c
@@ -579,6 +579,7 @@ _gtk_source_space_drawer_draw (GtkSourceSpaceDrawer *drawer,
        gint max_y;
        GtkTextIter start;
        GtkTextIter end;
+       GtkTextIter iter;
        GtkTextIter leading_end;
        GtkTextIter trailing_start;
        GtkTextIter line_end;
@@ -636,25 +637,27 @@ _gtk_source_space_drawer_draw (GtkSourceSpaceDrawer *drawer,
        cairo_set_line_width (cr, 0.8);
        cairo_translate (cr, -0.5, -0.5);
 
+       iter = start;
+
        while (TRUE)
        {
-               gunichar c = gtk_text_iter_get_char (&start);
+               gunichar c = gtk_text_iter_get_char (&iter);
                gint ly;
 
                if (is_whitespace (c) &&
-                   space_needs_drawing (drawer, &start, &leading_end, &trailing_start))
+                   space_needs_drawing (drawer, &iter, &leading_end, &trailing_start))
                {
-                       draw_whitespace_at_iter (text_view, &start, cr);
+                       draw_whitespace_at_iter (text_view, &iter, cr);
                }
 
-               if (!gtk_text_iter_forward_char (&start))
+               if (!gtk_text_iter_forward_char (&iter))
                {
                        break;
                }
 
-               if (gtk_text_iter_compare (&start, &line_end) > 0)
+               if (gtk_text_iter_compare (&iter, &line_end) > 0)
                {
-                       if (gtk_text_iter_compare (&start, &end) > 0)
+                       if (gtk_text_iter_compare (&iter, &end) > 0)
                        {
                                break;
                        }
@@ -662,24 +665,24 @@ _gtk_source_space_drawer_draw (GtkSourceSpaceDrawer *drawer,
                        /* Move to the first iter in the exposed area of the
                         * next line.
                         */
-                       if (!gtk_text_iter_starts_line (&start) &&
-                           !gtk_text_iter_forward_line (&start))
+                       if (!gtk_text_iter_starts_line (&iter) &&
+                           !gtk_text_iter_forward_line (&iter))
                        {
                                break;
                        }
 
-                       gtk_text_view_get_line_yrange (text_view, &start, &ly, NULL);
-                       gtk_text_view_get_iter_at_location (text_view, &start, min_x, ly);
+                       gtk_text_view_get_line_yrange (text_view, &iter, &ly, NULL);
+                       gtk_text_view_get_iter_at_location (text_view, &iter, min_x, ly);
 
                        /* Move back one char otherwise tabs may not be redrawn. */
-                       if (!gtk_text_iter_starts_line (&start))
+                       if (!gtk_text_iter_starts_line (&iter))
                        {
-                               gtk_text_iter_backward_char (&start);
+                               gtk_text_iter_backward_char (&iter);
                        }
 
-                       _gtk_source_iter_get_leading_spaces_end_boundary (&start, &leading_end);
-                       _gtk_source_iter_get_trailing_spaces_start_boundary (&start, &trailing_start);
-                       get_line_end (text_view, &start, &line_end, max_x, max_y, is_wrapping);
+                       _gtk_source_iter_get_leading_spaces_end_boundary (&iter, &leading_end);
+                       _gtk_source_iter_get_trailing_spaces_start_boundary (&iter, &trailing_start);
+                       get_line_end (text_view, &iter, &line_end, max_x, max_y, is_wrapping);
                }
        };