expo: Set up the width and height of objects

Provide a way to set the full dimensions of objects, i.e. including the
width and height.

For menus, calculate the bounding box of all objects in the menu. Set all
labels to be the same size, so that highlighting works correct, once
implemented.

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

1 files changed, 79 insertions, 0 deletions

diff --git a/boot/scene_menu.c b/boot/scene_menu.c
index eed7565f6a..fa79cecdbd 100644
--- a/boot/scene_menu.c
+++ b/boot/scene_menu.c
@@ -43,6 +43,85 @@ static void menu_point_to_item(struct scene_obj_menu *menu, uint item_id)
 	menu->cur_item_id = item_id;
 }
 
+static int scene_bbox_union(struct scene *scn, uint id,
+			    struct vidconsole_bbox *bbox)
+{
+	struct scene_obj *obj;
+
+	if (!id)
+		return 0;
+	obj = scene_obj_find(scn, id, SCENEOBJT_NONE);
+	if (!obj)
+		return log_msg_ret("obj", -ENOENT);
+	if (bbox->valid) {
+		bbox->x0 = min(bbox->x0, obj->dim.x);
+		bbox->y0 = min(bbox->y0, obj->dim.y);
+		bbox->x1 = max(bbox->x1, obj->dim.x + obj->dim.w);
+		bbox->y1 = max(bbox->y1, obj->dim.y + obj->dim.h);
+	} else {
+		bbox->x0 = obj->dim.x;
+		bbox->y0 = obj->dim.y;
+		bbox->x1 = obj->dim.x + obj->dim.w;
+		bbox->y1 = obj->dim.y + obj->dim.h;
+		bbox->valid = true;
+	}
+
+	return 0;
+}
+
+/**
+ * scene_menu_calc_bbox() - Calculate bounding boxes for the menu
+ *
+ * @menu: Menu to process
+ * @bbox: Returns bounding box of menu including prompts
+ * @label_bbox: Returns bounding box of labels
+ */
+static void scene_menu_calc_bbox(struct scene_obj_menu *menu,
+				 struct vidconsole_bbox *bbox,
+				 struct vidconsole_bbox *label_bbox)
+{
+	const struct scene_menitem *item;
+
+	bbox->valid = false;
+	scene_bbox_union(menu->obj.scene, menu->title_id, bbox);
+
+	label_bbox->valid = false;
+
+	list_for_each_entry(item, &menu->item_head, sibling) {
+		scene_bbox_union(menu->obj.scene, item->label_id, bbox);
+		scene_bbox_union(menu->obj.scene, item->key_id, bbox);
+		scene_bbox_union(menu->obj.scene, item->desc_id, bbox);
+		scene_bbox_union(menu->obj.scene, item->preview_id, bbox);
+
+		/* Get the bounding box of all labels */
+		scene_bbox_union(menu->obj.scene, item->label_id, label_bbox);
+	}
+}
+
+int scene_menu_calc_dims(struct scene_obj_menu *menu)
+{
+	struct vidconsole_bbox bbox, label_bbox;
+	const struct scene_menitem *item;
+
+	scene_menu_calc_bbox(menu, &bbox, &label_bbox);
+
+	/* Make all labels the same size */
+	if (label_bbox.valid) {
+		list_for_each_entry(item, &menu->item_head, sibling) {
+			scene_obj_set_size(menu->obj.scene, item->label_id,
+					   label_bbox.x1 - label_bbox.x0,
+					   label_bbox.y1 - label_bbox.y0);
+		}
+	}
+
+	if (bbox.valid) {
+		menu->obj.dim.w = bbox.x1 - bbox.x0;
+		menu->obj.dim.h = bbox.y1 - bbox.y0;
+	}
+
+	return 0;
+}
+
 int scene_menu_arrange(struct scene *scn, struct scene_obj_menu *menu)
 {
 	struct scene_menitem *item;