Gamen3/Assets/TutorialInfo/Scripts/Editor

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using System;
using System.IO;
using System.Reflection;

[CustomEditor(typeof(Readme))]
[InitializeOnLoad]
public class ReadmeEditor : Editor
{
static string s_ShowedReadmeSessionStateName = "ReadmeEditor.showedReadme";

static string s_ReadmeSourceDirectory = "Assets/TutorialInfo";

const float k_Space = 16f;

static ReadmeEditor()
{
EditorApplication.delayCall += SelectReadmeAutomatically;
}

static void RemoveTutorial()
{
if (EditorUtility.DisplayDialog("Remove Readme Assets",

$"All contents under {s_ReadmeSourceDirectory} will be removed, are you sure you want to proceed?",
"Proceed",
"Cancel"))
{
if (Directory.Exists(s_ReadmeSourceDirectory))
{
FileUtil.DeleteFileOrDirectory(s_ReadmeSourceDirectory);
FileUtil.DeleteFileOrDirectory(s_ReadmeSourceDirectory + ".meta");
}
else
{
Debug.Log($"Could not find the Readme folder at {s_ReadmeSourceDirectory}");
}

var readmeAsset = SelectReadme();
if (readmeAsset != null)
{
var path = AssetDatabase.GetAssetPath(readmeAsset);
FileUtil.DeleteFileOrDirectory(path + ".meta");
FileUtil.DeleteFileOrDirectory(path);
}

AssetDatabase.Refresh();
}
}

static void SelectReadmeAutomatically()
{
if (!SessionState.GetBool(s_ShowedReadmeSessionStateName, false))
{
var readme = SelectReadme();
SessionState.SetBool(s_ShowedReadmeSessionStateName, true);

if (readme && !readme.loadedLayout)
{
LoadLayout();
readme.loadedLayout = true;
}
}
}

static void LoadLayout()
{
var assembly = typeof(EditorApplication).Assembly;
var windowLayoutType = assembly.GetType("UnityEditor.WindowLayout", true);
var method = windowLayoutType.GetMethod("LoadWindowLayout", BindingFlags.Public | BindingFlags.Static);
method.Invoke(null, new object[] { Path.Combine(Application.dataPath, "TutorialInfo/Layout.wlt"), false });
}

static Readme SelectReadme()
{
var ids = AssetDatabase.FindAssets("Readme t:Readme");
if (ids.Length == 1)
{
var readmeObject = AssetDatabase.LoadMainAssetAtPath(AssetDatabase.GUIDToAssetPath(ids[0]));

Selection.objects = new UnityEngine.Object[] { readmeObject };

return (Readme)readmeObject;
}
else
{
Debug.Log("Couldn't find a readme");
return null;
}
}

protected override void OnHeaderGUI()
{
var readme = (Readme)target;
Init();

var iconWidth = Mathf.Min(EditorGUIUtility.currentViewWidth / 3f - 20f, 128f);

GUILayout.BeginHorizontal("In BigTitle");
{
if (readme.icon != null)
{
GUILayout.Space(k_Space);
GUILayout.Label(readme.icon, GUILayout.Width(iconWidth), GUILayout.Height(iconWidth));
}
GUILayout.Space(k_Space);
GUILayout.BeginVertical();
{

GUILayout.FlexibleSpace();
GUILayout.Label(readme.title, TitleStyle);
GUILayout.FlexibleSpace();
}
GUILayout.EndVertical();
GUILayout.FlexibleSpace();
}
GUILayout.EndHorizontal();
}

public override void OnInspectorGUI()
{
var readme = (Readme)target;
Init();

foreach (var section in readme.sections)
{
if (!string.IsNullOrEmpty(section.heading))
{
GUILayout.Label(section.heading, HeadingStyle);
}

if (!string.IsNullOrEmpty(section.text))
{
GUILayout.Label(section.text, BodyStyle);
}

if (!string.IsNullOrEmpty(section.linkText))
{
if (LinkLabel(new GUIContent(section.linkText)))
{
Application.OpenURL(section.url);
}
}

GUILayout.Space(k_Space);
}

if (GUILayout.Button("Remove Readme Assets", ButtonStyle))
{
RemoveTutorial();
}
}

bool m_Initialized;

GUIStyle LinkStyle
{
get { return m_LinkStyle; }
}

[SerializeField]
GUIStyle m_LinkStyle;

GUIStyle TitleStyle
{
get { return m_TitleStyle; }
}

[SerializeField]
GUIStyle m_TitleStyle;

GUIStyle HeadingStyle
{
get { return m_HeadingStyle; }
}

[SerializeField]
GUIStyle m_HeadingStyle;

GUIStyle BodyStyle
{
get { return m_BodyStyle; }
}

[SerializeField]
GUIStyle m_BodyStyle;

GUIStyle ButtonStyle
{
get { return m_ButtonStyle; }
}

[SerializeField]
GUIStyle m_ButtonStyle;

void Init()
{
if (m_Initialized)
return;
m_BodyStyle = new GUIStyle(EditorStyles.label);
m_BodyStyle.wordWrap = true;
m_BodyStyle.fontSize = 14;
m_BodyStyle.richText = true;

m_TitleStyle = new GUIStyle(m_BodyStyle);
m_TitleStyle.fontSize = 26;

m_HeadingStyle = new GUIStyle(m_BodyStyle);
m_HeadingStyle.fontStyle = FontStyle.Bold;
m_HeadingStyle.fontSize = 18;

m_LinkStyle = new GUIStyle(m_BodyStyle);
m_LinkStyle.wordWrap = false;

// Match selection color which works nicely for both light and dark skins
m_LinkStyle.normal.textColor = new Color(0x00 / 255f, 0x78 / 255f, 0xDA / 255f, 1f);
m_LinkStyle.stretchWidth = false;

m_ButtonStyle = new GUIStyle(EditorStyles.miniButton);
m_ButtonStyle.fontStyle = FontStyle.Bold;

m_Initialized = true;
}

bool LinkLabel(GUIContent label, params GUILayoutOption[] options)
{
var position = GUILayoutUtility.GetRect(label, LinkStyle, options);

Handles.BeginGUI();
Handles.color = LinkStyle.normal.textColor;
Handles.DrawLine(new Vector3(position.xMin, position.yMax), new Vector3(position.xMax, position.yMax));
Handles.color = Color.white;
Handles.EndGUI();

EditorGUIUtility.AddCursorRect(position, MouseCursor.Link);

return GUI.Button(position, label, LinkStyle);
}
}