Always show marker tooltips

using UnityEngine;

public class ModifyDrawTooltipsAlways:MonoBehaviour
{
    public float offsetY;

    private OnlineMaps map;
    private OnlineMapsControlBase control;
    private bool isTileset;
    private GUIStyle tooltipStyle;

    private void Start()
    {
        map = OnlineMaps.instance;
        control = OnlineMapsControlBase.instance;
        isTileset = control is OnlineMapsTileSetControl;
        OnlineMapsMarkerBase.OnMarkerDrawTooltip += OnMarkerDrawTooltip;

        tooltipStyle = new GUIStyle
        {
            normal =
            {
                background = map.tooltipBackgroundTexture,
                textColor = new Color32(230, 230, 230, 255)
            },
            border = new RectOffset(8, 8, 8, 8),
            margin = new RectOffset(4, 4, 4, 4),
            wordWrap = true,
            richText = true,
            alignment = TextAnchor.MiddleCenter,
            stretchWidth = true,
            padding = new RectOffset(0, 0, 3, 3)
        };
    }

    private void OnGUITooltip(GUIStyle style, string text, Vector2 position)
    {
        GUIContent tip = new GUIContent(text);
        Vector2 size = style.CalcSize(tip);
        GUI.Label(new Rect(position.x - size.x / 2 - 5, Screen.height - position.y - size.y - 20 + offsetY, size.x + 10, size.y + 5), text, style);
    }

    private void OnMarkerDrawTooltip(OnlineMapsMarkerBase markerBase)
    {
        double tlx, tly, brx, bry;
        map.GetCorners(out tlx, out tly, out brx, out bry);
        if (brx < tlx) brx += 360;

        double mx, my;
        markerBase.GetPosition(out mx, out my);

        OnlineMapsMarker marker = markerBase as OnlineMapsMarker;

        GUIStyle style = new GUIStyle(tooltipStyle);

        if (isTileset)
        {
            Vector2 tilesetSize = map.tilesetSize;

            Vector3 p1 = OnlineMapsTileSetControl.instance.GetWorldPositionWithElevation(mx, my, tlx, tly, brx, bry);
            Vector3 p2 = p1 + new Vector3(0, 0, tilesetSize.y / map.tilesetHeight * marker.height * marker.scale);

            Vector2 screenPoint1 = OnlineMapsTileSetControl.instance.activeCamera.WorldToScreenPoint(p1);
            Vector2 screenPoint2 = OnlineMapsTileSetControl.instance.activeCamera.WorldToScreenPoint(p2);

            float yOffset = (screenPoint1.y - screenPoint2.y) * transform.localScale.x - 10;

            OnGUITooltip(style, marker.label, screenPoint1 + new Vector2(0, yOffset));
        }
        else
        {
            Rect rect = marker.screenRect;
            OnGUITooltip(style, marker.label, new Vector2(rect.x + rect.width / 2, rect.y + rect.height + 5));
        }
    }
}