[PATCH 26/40] expo: Use flags for objects

[Simon Glass]

We currently have just a 'hide' property for each object. In preparation
for adding more properties, convert the struct to use a flags value,
instead of individual booleans. This is more extensible.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 boot/scene.c          | 17 +++++++++++++++--
 boot/scene_internal.h | 11 +++++++++++
 include/expo.h        | 13 +++++++++++--
 test/boot/expo.c      |  6 +++---
 4 files changed, 40 insertions(+), 7 deletions(-)

diff --git a/boot/scene.c b/boot/scene.c
index 8033d77fb266..dd1472d4f9aa 100644
--- a/boot/scene.c
+++ b/boot/scene.c
@@ -208,13 +208,26 @@ int scene_obj_set_pos(struct scene *scn, uint id, int x, int y)
 }
 
 int scene_obj_set_hide(struct scene *scn, uint id, bool hide)
+{
+	int ret;
+
+	ret = scene_obj_flag_clrset(scn, id, SCENEOF_HIDE,
+				    hide ? SCENEOF_HIDE : 0);
+	if (ret)
+		return log_msg_ret("flg", ret);
+
+	return 0;
+}
+
+int scene_obj_flag_clrset(struct scene *scn, uint id, uint clr, uint set)
 {
 	struct scene_obj *obj;
 
 	obj = scene_obj_find(scn, id, SCENEOBJT_NONE);
 	if (!obj)
 		return log_msg_ret("find", -ENOENT);
-	obj->hide = hide;
+	obj->flags &= ~clr;
+	obj->flags |= set;
 
 	return 0;
 }
@@ -358,7 +371,7 @@ int scene_render(struct scene *scn)
 	int ret;
 
 	list_for_each_entry(obj, &scn->obj_head, sibling) {
-		if (!obj->hide) {
+		if (!(obj->flags & SCENEOF_HIDE)) {
 			ret = scene_obj_render(obj, exp->text_mode);
 			if (ret && ret != -ENOTSUPP)
 				return log_msg_ret("ren", ret);
diff --git a/boot/scene_internal.h b/boot/scene_internal.h
index 9f173dd749f0..24a2ba6a6a3d 100644
--- a/boot/scene_internal.h
+++ b/boot/scene_internal.h
@@ -54,6 +54,17 @@ void *scene_obj_find(struct scene *scn, uint id, enum scene_obj_t type);
 int scene_obj_add(struct scene *scn, const char *name, uint id,
 		  enum scene_obj_t type, uint size, struct scene_obj **objp);
 
+/**
+ * scene_obj_flag_clrset() - Adjust object flags
+ *
+ * @scn: Scene to update
+ * @id: ID of object to update
+ * @clr: Bits to clear in the object's flags
+ * @set: Bits to set in the object's flags
+ * Returns 0 if OK, -ENOENT if the object was not found
+ */
+int scene_obj_flag_clrset(struct scene *scn, uint id, uint clr, uint set);
+
 /**
  * scene_menu_arrange() - Set the position of things in the menu
  *
diff --git a/include/expo.h b/include/expo.h
index 5135954ba139..b6777cebcbec 100644
--- a/include/expo.h
+++ b/include/expo.h
@@ -137,6 +137,15 @@ struct scene_dim {
 	int h;
 };
 
+/**
+ * enum scene_obj_flags_t - flags for objects
+ *
+ * @SCENEOF_HIDE: object should be hidden
+ */
+enum scene_obj_flags_t {
+	SCENEOF_HIDE	= 1 << 0,
+};
+
 /**
  * struct scene_obj - information about an object in a scene
  *
@@ -145,7 +154,7 @@ struct scene_dim {
  * @id: ID number of the object
  * @type: Type of this object
  * @dim: Dimensions for this object
- * @hide: true if the object should be hidden
+ * @flags: Flags for this object
  * @sibling: Node to link this object to its siblings
  */
 struct scene_obj {
@@ -154,7 +163,7 @@ struct scene_obj {
 	uint id;
 	enum scene_obj_t type;
 	struct scene_dim dim;
-	bool hide;
+	int flags;
 	struct list_head sibling;
 };
 
diff --git a/test/boot/expo.c b/test/boot/expo.c
index 10cb7b246f3f..5088776f7bd5 100644
--- a/test/boot/expo.c
+++ b/test/boot/expo.c
@@ -372,7 +372,7 @@ static int expo_object_menu(struct unit_test_state *uts)
 
 	ut_asserteq(-4, prev1->obj.dim.x);
 	ut_asserteq(menu->obj.dim.y + 32, prev1->obj.dim.y);
-	ut_asserteq(false, prev1->obj.hide);
+	ut_asserteq(false, prev1->obj.flags & SCENEOF_HIDE);
 
 	expo_destroy(exp);
 
@@ -488,10 +488,10 @@ static int expo_render_image(struct unit_test_state *uts)
 
 	/* make sure only the preview for the second item is shown */
 	obj = scene_obj_find(scn, ITEM1_PREVIEW, SCENEOBJT_NONE);
-	ut_asserteq(true, obj->hide);
+	ut_asserteq(true, obj->flags & SCENEOF_HIDE);
 
 	obj = scene_obj_find(scn, ITEM2_PREVIEW, SCENEOBJT_NONE);
-	ut_asserteq(false, obj->hide);
+	ut_asserteq(false, obj->flags & SCENEOF_HIDE);
 
 	/* select it */
 	ut_assertok(expo_send_key(exp, BKEY_SELECT));
-- 
2.41.0.rc0.172.g3f132b7071-goog