Patch 8.0.0349
Problem:    Redrawing errors with GTK 3.
Solution:   When updating, first clear all rectangles and then draw them.
            (Kazunobu Kuriyama, Christian Ludwig, closes #848)
Files:      src/gui_gtk_x11.c


*** ../vim-8.0.0348/src/gui_gtk_x11.c   2017-02-01 11:50:04.346268005 +0100
--- src/gui_gtk_x11.c   2017-02-23 12:17:58.934631926 +0100
***************
*** 630,635 ****
--- 630,636 ----
      static void
  gui_gtk3_redraw(int x, int y, int width, int height)
  {
+     /* Range checks are left to gui_redraw_block() */
      gui_redraw_block(Y_2_ROW(y), X_2_COL(x),
            Y_2_ROW(y + height - 1), X_2_COL(x + width - 1),
            GUI_MON_NOCLEAR);
***************
*** 684,695 ****
        if (list->status != CAIRO_STATUS_CLIP_NOT_REPRESENTABLE)
        {
            int i;
            for (i = 0; i < list->num_rectangles; i++)
            {
                const cairo_rectangle_t rect = list->rectangles[i];
  
!               gui_mch_clear_block(Y_2_ROW(rect.y), 1,
!                       Y_2_ROW(rect.y + rect.height - 1), Columns);
  
                if (blink_mode)
                    gui_gtk3_redraw(rect.x, rect.y, rect.width, rect.height);
--- 685,704 ----
        if (list->status != CAIRO_STATUS_CLIP_NOT_REPRESENTABLE)
        {
            int i;
+ 
+           /* First clear all the blocks and then redraw them.  Just in case
+            * some blocks overlap. */
            for (i = 0; i < list->num_rectangles; i++)
            {
                const cairo_rectangle_t rect = list->rectangles[i];
  
!               gui_mch_clear_block(Y_2_ROW((int)rect.y), 0,
!                       Y_2_ROW((int)(rect.y + rect.height)) - 1, Columns - 1);
!           }
! 
!           for (i = 0; i < list->num_rectangles; i++)
!           {
!               const cairo_rectangle_t rect = list->rectangles[i];
  
                if (blink_mode)
                    gui_gtk3_redraw(rect.x, rect.y, rect.width, rect.height);
***************
*** 6709,6716 ****
   * (row2, col2) inclusive.
   */
      void
! gui_mch_clear_block(int row1, int col1, int row2, int col2)
  {
  #if GTK_CHECK_VERSION(3,0,0)
      if (gtk_widget_get_window(gui.drawarea) == NULL)
        return;
--- 6718,6731 ----
   * (row2, col2) inclusive.
   */
      void
! gui_mch_clear_block(int row1arg, int col1arg, int row2arg, int col2arg)
  {
+ 
+     int col1 = check_col(col1arg);
+     int col2 = check_col(col2arg);
+     int row1 = check_row(row1arg);
+     int row2 = check_row(row2arg);
+ 
  #if GTK_CHECK_VERSION(3,0,0)
      if (gtk_widget_get_window(gui.drawarea) == NULL)
        return;
*** ../vim-8.0.0348/src/version.c       2017-02-22 22:04:01.133026003 +0100
--- src/version.c       2017-02-23 12:14:07.620065351 +0100
***************
*** 766,767 ****
--- 766,769 ----
  {   /* Add new patch number below this line */
+ /**/
+     349,
  /**/

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