[evolution] Bug #235665 - Heavy hard disk access when resizing columns in views

[Milan Crha <mcrha src gnome org>]

commit aa75990c13d0fb2aea2ced1f9f7bd7d1785bdffc
Author: Milan Crha <mcrha redhat com>
Date:   Fri Oct 7 15:35:15 2011 +0200

    Bug #235665 - Heavy hard disk access when resizing columns in views

 widgets/table/e-table-header-item.c |   10 +++++++++
 widgets/table/e-table.c             |   33 +++++++++++++++++++++++++++++++-
 widgets/table/e-table.h             |    6 +++++
 widgets/table/e-tree.c              |   36 ++++++++++++++++++++++++++++++++++-
 widgets/table/e-tree.h              |    3 ++
 5 files changed, 86 insertions(+), 2 deletions(-)
---
diff --git a/widgets/table/e-table-header-item.c b/widgets/table/e-table-header-item.c
index b8aa55f..43871a2 100644
--- a/widgets/table/e-table-header-item.c
+++ b/widgets/table/e-table-header-item.c
@@ -1192,6 +1192,11 @@ ethi_end_resize (ETableHeaderItem *ethi)
 	ethi->resize_col = -1;
 	ethi->resize_guide = GINT_TO_POINTER (0);
 
+	if (ethi->table)
+		e_table_thaw_state_change (ethi->table);
+	else if (ethi->tree)
+		e_tree_thaw_state_change (ethi->tree);
+
 	gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (ethi));
 }
 
@@ -1903,6 +1908,11 @@ ethi_event (GnomeCanvasItem *item,
 			ethi->resize_col = col;
 			ethi->resize_start_pos = start - ecol->width;
 			ethi->resize_min_width = ecol->min_width;
+
+			if (ethi->table)
+				e_table_freeze_state_change (ethi->table);
+			else if (ethi->tree)
+				e_tree_freeze_state_change (ethi->tree);
 		} else {
 			if (e->button.button == 1) {
 				ethi->click_x = e->button.x;
diff --git a/widgets/table/e-table.c b/widgets/table/e-table.c
index 4726817..e81dc6b 100644
--- a/widgets/table/e-table.c
+++ b/widgets/table/e-table.c
@@ -203,7 +203,10 @@ et_disconnect_model (ETable *et)
 static void
 e_table_state_change (ETable *et)
 {
-	g_signal_emit (G_OBJECT (et), et_signals[STATE_CHANGE], 0);
+	if (et->state_change_freeze)
+		et->state_changed = TRUE;
+	else
+		g_signal_emit (G_OBJECT (et), et_signals[STATE_CHANGE], 0);
 }
 
 #define CHECK_HORIZONTAL(et) \
@@ -605,6 +608,9 @@ e_table_init (ETable *e_table)
 	e_table->current_search_col     = NULL;
 
 	e_table->header_width           = 0;
+
+	e_table->state_changed		= FALSE;
+	e_table->state_change_freeze	= 0;
 }
 
 /* Grab_focus handler for the ETable */
@@ -3709,3 +3715,28 @@ e_table_class_init (ETableClass *class)
 
 	gal_a11y_e_table_init ();
 }
+
+void
+e_table_freeze_state_change (ETable *table)
+{
+	g_return_if_fail (table != NULL);
+
+	table->state_change_freeze++;
+	if (table->state_change_freeze == 1)
+		table->state_changed = FALSE;
+
+	g_return_if_fail (table->state_change_freeze != 0);
+}
+
+void
+e_table_thaw_state_change (ETable *table)
+{
+	g_return_if_fail (table != NULL);
+	g_return_if_fail (table->state_change_freeze != 0);
+
+	table->state_change_freeze--;
+	if (table->state_change_freeze == 0 && table->state_changed) {
+		table->state_changed = FALSE;
+		e_table_state_change (table);
+	}
+}
diff --git a/widgets/table/e-table.h b/widgets/table/e-table.h
index e1e4e0e..6c29088 100644
--- a/widgets/table/e-table.h
+++ b/widgets/table/e-table.h
@@ -170,6 +170,9 @@ struct _ETable {
 	gint header_width;
 
 	gchar *domain;
+
+	gboolean state_changed;
+	guint state_change_freeze;
 };
 
 struct _ETableClass {
@@ -386,6 +389,9 @@ void		e_table_right_click_up		(ETable *table);
 
 void		e_table_commit_click_to_add	(ETable *table);
 
+void		e_table_freeze_state_change	(ETable *table);
+void		e_table_thaw_state_change	(ETable *table);
+
 G_END_DECLS
 
 #endif /* _E_TABLE_H_ */
diff --git a/widgets/table/e-tree.c b/widgets/table/e-tree.c
index effd1e9..e24ce6a 100644
--- a/widgets/table/e-tree.c
+++ b/widgets/table/e-tree.c
@@ -197,6 +197,9 @@ struct _ETreePrivate {
 	ETreeDragSourceSite *site;
 
 	GList *expanded_list;
+
+	gboolean state_changed;
+	guint state_change_freeze;
 };
 
 static guint et_signals[LAST_SIGNAL] = { 0, };
@@ -299,7 +302,10 @@ current_search_col (ETree *et)
 static void
 e_tree_state_change (ETree *et)
 {
-	g_signal_emit (G_OBJECT (et), et_signals[STATE_CHANGE], 0);
+	if (et->priv->state_change_freeze)
+		et->priv->state_changed = TRUE;
+	else
+		g_signal_emit (G_OBJECT (et), et_signals[STATE_CHANGE], 0);
 }
 
 static void
@@ -629,6 +635,9 @@ e_tree_init (ETree *e_tree)
 		G_CALLBACK (et_search_accept), e_tree);
 
 	e_tree->priv->always_search = g_getenv ("GAL_ALWAYS_SEARCH") ? TRUE : FALSE;
+
+	e_tree->priv->state_changed = FALSE;
+	e_tree->priv->state_change_freeze = 0;
 }
 
 /* Grab_focus handler for the ETree */
@@ -3787,3 +3796,28 @@ e_tree_set_info_message (ETree *tree,
 	} else
 		gnome_canvas_item_set (tree->priv->info_text, "text", info_message, NULL);
 }
+
+void
+e_tree_freeze_state_change (ETree *tree)
+{
+	g_return_if_fail (tree != NULL);
+
+	tree->priv->state_change_freeze++;
+	if (tree->priv->state_change_freeze == 1)
+		tree->priv->state_changed = FALSE;
+
+	g_return_if_fail (tree->priv->state_change_freeze != 0);
+}
+
+void
+e_tree_thaw_state_change (ETree *tree)
+{
+	g_return_if_fail (tree != NULL);
+	g_return_if_fail (tree->priv->state_change_freeze != 0);
+
+	tree->priv->state_change_freeze--;
+	if (tree->priv->state_change_freeze == 0 && tree->priv->state_changed) {
+		tree->priv->state_changed = FALSE;
+		e_tree_state_change (tree);
+	}
+}
diff --git a/widgets/table/e-tree.h b/widgets/table/e-tree.h
index 6504caf..08e5603 100644
--- a/widgets/table/e-tree.h
+++ b/widgets/table/e-tree.h
@@ -362,6 +362,9 @@ GnomeCanvasItem *
 void		e_tree_set_info_message		(ETree *tree,
 						 const gchar *info_message);
 
+void		e_tree_freeze_state_change	(ETree *table);
+void		e_tree_thaw_state_change	(ETree *table);
+
 G_END_DECLS
 
 #endif /* _E_TREE_H_ */