Implement clipboard for mask splines

So now it's possible to copy-paste splines between layers.

Implementation is pretty much straightforward and duplicates
some logic which we've got in sequencer/tracking clipboards.

Will work on a common routine for clipboards later, for now
it's not so much crucial to have.

3 files changed, 75 insertions, 0 deletions

diff --git a/source/blender/editors/mask/mask_edit.c b/source/blender/editors/mask/mask_edit.c
index 62eb9cc240a..ad287a3af9f 100644
--- a/source/blender/editors/mask/mask_edit.c
+++ b/source/blender/editors/mask/mask_edit.c
@@ -456,6 +456,10 @@ void ED_operatortypes_mask(void)
 
 	/* duplicate */
 	WM_operatortype_append(MASK_OT_duplicate);
+
+	/* clipboard */
+	WM_operatortype_append(MASK_OT_copy_splines);
+	WM_operatortype_append(MASK_OT_paste_splines);
 }
 
 void ED_keymap_mask(wmKeyConfig *keyconf)
diff --git a/source/blender/editors/mask/mask_intern.h b/source/blender/editors/mask/mask_intern.h
index 09ca2290781..9461922ef78 100644
--- a/source/blender/editors/mask/mask_intern.h
+++ b/source/blender/editors/mask/mask_intern.h
@@ -79,6 +79,8 @@ struct MaskSplinePoint *ED_mask_point_find_nearest(
 void MASK_OT_layer_move(struct wmOperatorType *ot);
 
 void MASK_OT_duplicate(struct wmOperatorType *ot);
+void MASK_OT_copy_splines(struct wmOperatorType *ot);
+void MASK_OT_paste_splines(struct wmOperatorType *ot);
 
 /* mask_relationships.c */
 void MASK_OT_parent_set(struct wmOperatorType *ot);
diff --git a/source/blender/editors/mask/mask_ops.c b/source/blender/editors/mask/mask_ops.c
index f6ba4063e90..c255168d854 100644
--- a/source/blender/editors/mask/mask_ops.c
+++ b/source/blender/editors/mask/mask_ops.c
@@ -1599,3 +1599,72 @@ void MASK_OT_duplicate(wmOperatorType *ot)
 	/* flags */
 	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
 }
+
+/********************** copy splines to clipboard operator *********************/
+
+static int copy_splines_exec(bContext *C, wmOperator *UNUSED(op))
+{
+	Mask *mask = CTX_data_edit_mask(C);
+	MaskLayer *mask_layer = BKE_mask_layer_active(mask);
+
+	BKE_mask_clipboard_copy_from_layer(mask_layer);
+
+	return OPERATOR_FINISHED;
+}
+
+void MASK_OT_copy_splines(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name = "Copy Splines";
+	ot->description = "Copy selected splines to clipboard";
+	ot->idname = "MASK_OT_copy_splines";
+
+	/* api callbacks */
+	ot->exec = copy_splines_exec;
+	ot->poll = ED_maskedit_mask_poll;
+
+	/* flags */
+	ot->flag = OPTYPE_REGISTER;
+}
+
+/********************** paste tracks from clipboard operator *********************/
+
+static int paste_splines_poll(bContext *C)
+{
+	if (ED_maskedit_mask_poll(C)) {
+		return BKE_mask_clipboard_is_empty() == false;
+	}
+
+	return 0;
+}
+
+static int paste_splines_exec(bContext *C, wmOperator *UNUSED(op))
+{
+	Scene *scene = CTX_data_scene(C);
+	Mask *mask = CTX_data_edit_mask(C);
+	MaskLayer *mask_layer = BKE_mask_layer_active(mask);
+
+	BKE_mask_clipboard_paste_to_layer(CTX_data_main(C), mask_layer);
+
+	/* TODO: only update edited splines */
+	BKE_mask_update_display(mask, CFRA);
+
+	WM_event_add_notifier(C, NC_MASK | NA_EDITED, mask);
+
+	return OPERATOR_FINISHED;
+}
+
+void MASK_OT_paste_splines(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name = "Paste Splines";
+	ot->description = "Paste splines from clipboard";
+	ot->idname = "MASK_OT_paste_splines";
+
+	/* api callbacks */
+	ot->exec = paste_splines_exec;
+	ot->poll = paste_splines_poll;
+
+	/* flags */
+	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
+}