Gravity.js

const Gravity = {
    NO_GRAVITY: 0,
    CENTER_VERTICAL: 16,
    CENTER_HORIZONTAL: 1,
    CENTER: 17, // this.CENTER_VERTICAL|this.CENTER_HORIZONTAL,
    TOP: 48,
    BOTTOM: 80,
    LEFT: 3,
    RIGHT: 5,
    GRAVITY_NAME_VALUE_MAP: {
        center: this.CENTER,
        center_horizontal: this.CENTER_HORIZONTAL,
        center_vertical: this.CENTER_VERTICAL,
        left: this.LEFT,
        top: this.TOP,
        right: this.RIGHT,
        bottom: this.BOTTOM,
        "left,top": this.LEFT | this.TOP,
        "left,bottom": this.LEFT | this.BOTTOM,
        "right,top": this.RIGHT | this.TOP,
        "right,bottom": this.RIGHT | this.BOTTOM,
        "left,center_vertical": this.LEFT | this.CENTER_VERTICAL,
        "right,center_vertical": this.RIGHT | this.CENTER_VERTICAL,
        "top,center_horizontal": this.TOP | this.CENTER_HORIZONTAL,
        "bottom,center_horizontal": this.BOTTOM | this.CENTER_HORIZONTAL,
    }
}