[gedit/wip/printing-improvements] print-preview: fix preview_draw()

[Sébastien Wilmet <swilmet src gnome org>]

commit 4fca83c385a9f7725a5087ef09d002792ef5b1ff
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Jun 27 17:46:43 2015 +0200

    print-preview: fix preview_draw()
    
    There were two bugs in that function:
    - the non-selected pages were not skipped correctly
    - the X and Y coordinates for draw_page() were wrong
    
    With a while loop the code is simpler.

 gedit/gedit-print-preview.c |   12 +++++-------
 1 files changed, 5 insertions(+), 7 deletions(-)
---
diff --git a/gedit/gedit-print-preview.c b/gedit/gedit-print-preview.c
index 6aa2aef..c0aa873 100644
--- a/gedit/gedit-print-preview.c
+++ b/gedit/gedit-print-preview.c
@@ -924,26 +924,24 @@ preview_draw (GtkWidget         *widget,
 
        gtk_cairo_transform_to_window (cr, widget, bin_window);
 
+       col = 0;
        page_num = get_first_page_displayed (preview);
 
-       for (col = 0; col < preview->n_columns; col++)
+       while (col < preview->n_columns && page_num < preview->n_pages)
        {
                if (!gtk_print_operation_preview_is_selected (preview->gtk_preview, page_num))
                {
+                       page_num++;
                        continue;
                }
 
-               if (page_num == preview->n_pages)
-               {
-                       break;
-               }
-
                draw_page (cr,
+                          col * preview->tile_width,
                           0,
-                          col * preview->tile_height,
                           page_num,
                           preview);
 
+               col++;
                page_num++;
        }