Bug 587014 - Magic space does not work as expected

Neither ETree::key-press nor ETableItem::key-press signal definitions
specify a GSignalAccumulator that terminates the signal emission when
a handler returns TRUE, and Evolution 2.29 connects multiple handlers
to ETree::key-press.

When the space key is pressed, the first handler implements the magic
space bar behavior and returns TRUE, which should terminate signal
emission but doesn't because there's no accumulator function on the
signal.  So the second handler runs and checks for other keys besides
space.  It returns FALSE since it didn't handle the key press.

End result: emission site gets back FALSE (from the second handler) as
the return value, so it thinks the key press was not handled at all and
invokes the fallback handler -- e_selection_model_toggle_single_row() --
which -unselects- the newly selected row, making it appear the next
unread message was never selected.

Several other ETable-related signals that return "handled" flags also
lack GSignalAccumulator functions.  I've made a note to myself to fix
those as well.

4 files changed, 8 insertions, 8 deletions

diff --git a/widgets/table/e-table-item.c b/widgets/table/e-table-item.c
index d6f0a45cf7..8fa9e2ad4e 100644
--- a/widgets/table/e-table-item.c
+++ b/widgets/table/e-table-item.c
@@ -2964,9 +2964,9 @@ eti_class_init (ETableItemClass *klass)
 			      G_OBJECT_CLASS_TYPE (object_class),
 			      G_SIGNAL_RUN_LAST,
 			      G_STRUCT_OFFSET (ETableItemClass, key_press),
-			      NULL, NULL,
-			      e_marshal_INT__INT_INT_BOXED,
-			      G_TYPE_INT, 3, G_TYPE_INT,
+			      g_signal_accumulator_true_handled, NULL,
+			      e_marshal_BOOLEAN__INT_INT_BOXED,
+			      G_TYPE_BOOLEAN, 3, G_TYPE_INT,
 			      G_TYPE_INT, GDK_TYPE_EVENT);
 
 	eti_signals [STYLE_SET] =
diff --git a/widgets/table/e-table-item.h b/widgets/table/e-table-item.h
index 08efae6183..15415ff88d 100644
--- a/widgets/table/e-table-item.h
+++ b/widgets/table/e-table-item.h
@@ -168,7 +168,7 @@ typedef struct {
 	void        (*double_click)     (ETableItem *eti, gint row, gint col, GdkEvent *event);
 	gint        (*right_click)      (ETableItem *eti, gint row, gint col, GdkEvent *event);
 	gint        (*click)            (ETableItem *eti, gint row, gint col, GdkEvent *event);
-	gint        (*key_press)        (ETableItem *eti, gint row, gint col, GdkEvent *event);
+	gboolean    (*key_press)        (ETableItem *eti, gint row, gint col, GdkEvent *event);
 	gint        (*start_drag)       (ETableItem *eti, gint row, gint col, GdkEvent *event);
 	void        (*style_set)        (ETableItem *eti, GtkStyle *previous_style);
 	void        (*selection_model_removed)    (ETableItem *eti, ESelectionModel *selection);
diff --git a/widgets/table/e-tree.c b/widgets/table/e-tree.c
index 5e173906df..ddfb85abe8 100644
--- a/widgets/table/e-tree.c
+++ b/widgets/table/e-tree.c
@@ -3201,9 +3201,9 @@ e_tree_class_init (ETreeClass *class)
 			      G_OBJECT_CLASS_TYPE (object_class),
 			      G_SIGNAL_RUN_LAST,
 			      G_STRUCT_OFFSET (ETreeClass, key_press),
-			      NULL, NULL,
-			      e_marshal_INT__INT_POINTER_INT_BOXED,
-			      G_TYPE_INT, 4, G_TYPE_INT, G_TYPE_POINTER,
+			      g_signal_accumulator_true_handled, NULL,
+			      e_marshal_BOOLEAN__INT_POINTER_INT_BOXED,
+			      G_TYPE_BOOLEAN, 4, G_TYPE_INT, G_TYPE_POINTER,
 			      G_TYPE_INT, GDK_TYPE_EVENT);
 
 	et_signals [START_DRAG] =
diff --git a/widgets/table/e-tree.h b/widgets/table/e-tree.h
index 5657751111..fa2ab787ce 100644
--- a/widgets/table/e-tree.h
+++ b/widgets/table/e-tree.h
@@ -66,7 +66,7 @@ typedef struct {
 	void        (*double_click)       (ETree *et, gint row, ETreePath path, gint col, GdkEvent *event);
 	gint        (*right_click)        (ETree *et, gint row, ETreePath path, gint col, GdkEvent *event);
 	gint        (*click)              (ETree *et, gint row, ETreePath path, gint col, GdkEvent *event);
-	gint        (*key_press)          (ETree *et, gint row, ETreePath path, gint col, GdkEvent *event);
+	gboolean    (*key_press)          (ETree *et, gint row, ETreePath path, gint col, GdkEvent *event);
 	gint        (*start_drag)         (ETree *et, gint row, ETreePath path, gint col, GdkEvent *event);
 	gint        (*state_change)       (ETree *et);
 	gint        (*white_space_event)  (ETree *et, GdkEvent *event);