[gnumeric] Redraw: make sure to enable caches between cells.

[Morten Welinder <mortenw src gnome org>]

commit 7b7be0d5f4dabc417ac3193827c2f53925a51931
Author: Morten Welinder <terra gnome org>
Date:   Wed Mar 28 12:13:45 2012 -0400

    Redraw: make sure to enable caches between cells.
    
    Redraw does jit-compuation for rendered values, so we need to make sure
    the whole redraw is seen as one computation.

 ChangeLog   |    6 ++++++
 NEWS        |    1 +
 src/sheet.c |   12 ++++++++++++
 3 files changed, 19 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index e2905b5..653915c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2012-03-28  Morten Welinder  <terra gnome org>
+
+	* src/sheet.c (sheet_redraw_all, sheet_redraw_region): Mark whole
+	thing as one computation.  Jit-computation of rendered values
+	would otherwise discard caches between each cell.
+
 2012-03-26  Andreas J. Guelzow <aguelzow pyrshep ca>
 
 	* src/expr.c (do_expr_as_string): use new convs->output.boolean
diff --git a/NEWS b/NEWS
index 7850306..3cb051e 100644
--- a/NEWS
+++ b/NEWS
@@ -49,6 +49,7 @@ Morten:
 	* Improve test suite for ods.
 	* Fix scrollbar/spinbutton load-from-.gnumeric.  [Part of #672716]
 	* New function COVARIANCE.S.
+	* Enable MATCH/VLOOKUP/HLOOKUP caches during redraw.
 
 --------------------------------------------------------------------------
 Gnumeric 1.11.2
diff --git a/src/sheet.c b/src/sheet.c
index 990dcc2..ab2eaea 100644
--- a/src/sheet.c
+++ b/src/sheet.c
@@ -1380,8 +1380,13 @@ sheet_new (Workbook *wb, char const *name, int columns, int rows)
 void
 sheet_redraw_all (Sheet const *sheet, gboolean headers)
 {
+	/* We potentially do a lot of recalcs as part of this, so make sure
+	   stuff that cachings sub-computations see the whole thing instead
+	   of clearing between cells.  */
+	gnm_app_recalc_start ();
 	SHEET_FOREACH_CONTROL (sheet, view, control,
 		sc_redraw_all (control, headers););
+	gnm_app_recalc_finish ();
 }
 
 static GnmValue *
@@ -2942,10 +2947,17 @@ sheet_redraw_region (Sheet const *sheet,
 
 	g_return_if_fail (IS_SHEET (sheet));
 
+	/* We potentially do a lot of recalcs as part of this, so make sure
+	   stuff that cachings sub-computations see the whole thing instead
+	   of clearing between cells.  */
+	gnm_app_recalc_start ();
+
 	sheet_range_bounding_box (sheet,
 		range_init (&bound, start_col, start_row, end_col, end_row));
 	SHEET_FOREACH_CONTROL (sheet, view, control,
 		sc_redraw_range (control, &bound););
+
+	gnm_app_recalc_finish ();
 }
 
 void