GHZLangChao/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 kShowedReadmeSessionStateName = "ReadmeEditor.showedReadme";

static float kSpace = 16f;

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

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

[MenuItem("Tutorial/Show Tutorial Instructions")]
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");
{
GUILayout.Label(readme.icon, GUILayout.Width(iconWidth), GUILayout.Height(iconWidth));
GUILayout.Label(readme.title, TitleStyle);
}
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(kSpace);
}
}


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;

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

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

m_HeadingStyle = new GUIStyle(m_BodyStyle);
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_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);
}
}