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using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
using System;
namespace TMPro
{
public class TMP_TextEventHandler : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
{
[Serializable]
public class CharacterSelectionEvent : UnityEvent<char, int> { }
[Serializable]
public class SpriteSelectionEvent : UnityEvent<char, int> { }
[Serializable]
public class WordSelectionEvent : UnityEvent<string, int, int> { }
[Serializable]
public class LineSelectionEvent : UnityEvent<string, int, int> { }
[Serializable]
public class LinkSelectionEvent : UnityEvent<string, string, int> { }
/// <summary>
/// Event delegate triggered when pointer is over a character.
/// </summary>
public CharacterSelectionEvent onCharacterSelection
{
get { return m_OnCharacterSelection; }
set { m_OnCharacterSelection = value; }
}
[SerializeField]
private CharacterSelectionEvent m_OnCharacterSelection = new CharacterSelectionEvent();
/// <summary>
/// Event delegate triggered when pointer is over a sprite.
/// </summary>
public SpriteSelectionEvent onSpriteSelection
{
get { return m_OnSpriteSelection; }
set { m_OnSpriteSelection = value; }
}
[SerializeField]
private SpriteSelectionEvent m_OnSpriteSelection = new SpriteSelectionEvent();
/// <summary>
/// Event delegate triggered when pointer is over a word.
/// </summary>
public WordSelectionEvent onWordSelection
{
get { return m_OnWordSelection; }
set { m_OnWordSelection = value; }
}
[SerializeField]
private WordSelectionEvent m_OnWordSelection = new WordSelectionEvent();
/// <summary>
/// Event delegate triggered when pointer is over a line.
/// </summary>
public LineSelectionEvent onLineSelection
{
get { return m_OnLineSelection; }
set { m_OnLineSelection = value; }
}
[SerializeField]
private LineSelectionEvent m_OnLineSelection = new LineSelectionEvent();
/// <summary>
/// Event delegate triggered when pointer is over a link.
/// </summary>
public LinkSelectionEvent onLinkSelection
{
get { return m_OnLinkSelection; }
set { m_OnLinkSelection = value; }
}
[SerializeField]
private LinkSelectionEvent m_OnLinkSelection = new LinkSelectionEvent();
private TMP_Text m_TextComponent;
private Camera m_Camera;
private Canvas m_Canvas;
private int m_selectedLink = -1;
private int m_lastCharIndex = -1;
private int m_lastWordIndex = -1;
private int m_lastLineIndex = -1;
void Awake()
{
// Get a reference to the text component.
m_TextComponent = gameObject.GetComponent<TMP_Text>();
// Get a reference to the camera rendering the text taking into consideration the text component type.
if (m_TextComponent.GetType() == typeof(TextMeshProUGUI))
{
m_Canvas = gameObject.GetComponentInParent<Canvas>();
if (m_Canvas != null)
{
if (m_Canvas.renderMode == RenderMode.ScreenSpaceOverlay)
m_Camera = null;
else
m_Camera = m_Canvas.worldCamera;
}
}
else
{
m_Camera = Camera.main;
}
}
void LateUpdate()
{
if (TMP_TextUtilities.IsIntersectingRectTransform(m_TextComponent.rectTransform, Input.mousePosition, m_Camera))
{
#region Example of Character or Sprite Selection
int charIndex = TMP_TextUtilities.FindIntersectingCharacter(m_TextComponent, Input.mousePosition, m_Camera, true);
if (charIndex != -1 && charIndex != m_lastCharIndex)
{
m_lastCharIndex = charIndex;
TMP_TextElementType elementType = m_TextComponent.textInfo.characterInfo[charIndex].elementType;
// Send event to any event listeners depending on whether it is a character or sprite.
if (elementType == TMP_TextElementType.Character)
SendOnCharacterSelection(m_TextComponent.textInfo.characterInfo[charIndex].character, charIndex);
else if (elementType == TMP_TextElementType.Sprite)
SendOnSpriteSelection(m_TextComponent.textInfo.characterInfo[charIndex].character, charIndex);
}
#endregion
#region Example of Word Selection
// Check if Mouse intersects any words and if so assign a random color to that word.
int wordIndex = TMP_TextUtilities.FindIntersectingWord(m_TextComponent, Input.mousePosition, m_Camera);
if (wordIndex != -1 && wordIndex != m_lastWordIndex)
{
m_lastWordIndex = wordIndex;
// Get the information about the selected word.
TMP_WordInfo wInfo = m_TextComponent.textInfo.wordInfo[wordIndex];
// Send the event to any listeners.
SendOnWordSelection(wInfo.GetWord(), wInfo.firstCharacterIndex, wInfo.characterCount);
}
#endregion
#region Example of Line Selection
// Check if Mouse intersects any words and if so assign a random color to that word.
int lineIndex = TMP_TextUtilities.FindIntersectingLine(m_TextComponent, Input.mousePosition, m_Camera);
if (lineIndex != -1 && lineIndex != m_lastLineIndex)
{
m_lastLineIndex = lineIndex;
// Get the information about the selected word.
TMP_LineInfo lineInfo = m_TextComponent.textInfo.lineInfo[lineIndex];
// Send the event to any listeners.
char[] buffer = new char[lineInfo.characterCount];
for (int i = 0; i < lineInfo.characterCount && i < m_TextComponent.textInfo.characterInfo.Length; i++)
{
buffer[i] = m_TextComponent.textInfo.characterInfo[i + lineInfo.firstCharacterIndex].character;
}
string lineText = new string(buffer);
SendOnLineSelection(lineText, lineInfo.firstCharacterIndex, lineInfo.characterCount);
}
#endregion
#region Example of Link Handling
// Check if mouse intersects with any links.
int linkIndex = TMP_TextUtilities.FindIntersectingLink(m_TextComponent, Input.mousePosition, m_Camera);
// Handle new Link selection.
if (linkIndex != -1 && linkIndex != m_selectedLink)
{
m_selectedLink = linkIndex;
// Get information about the link.
TMP_LinkInfo linkInfo = m_TextComponent.textInfo.linkInfo[linkIndex];
// Send the event to any listeners.
SendOnLinkSelection(linkInfo.GetLinkID(), linkInfo.GetLinkText(), linkIndex);
}
#endregion
}
}
public void OnPointerEnter(PointerEventData eventData)
{
//Debug.Log("OnPointerEnter()");
}
public void OnPointerExit(PointerEventData eventData)
{
//Debug.Log("OnPointerExit()");
}
private void SendOnCharacterSelection(char character, int characterIndex)
{
if (onCharacterSelection != null)
onCharacterSelection.Invoke(character, characterIndex);
}
private void SendOnSpriteSelection(char character, int characterIndex)
{
if (onSpriteSelection != null)
onSpriteSelection.Invoke(character, characterIndex);
}
private void SendOnWordSelection(string word, int charIndex, int length)
{
if (onWordSelection != null)
onWordSelection.Invoke(word, charIndex, length);
}
private void SendOnLineSelection(string line, int charIndex, int length)
{
if (onLineSelection != null)
onLineSelection.Invoke(line, charIndex, length);
}
private void SendOnLinkSelection(string linkID, string linkText, int linkIndex)
{
if (onLinkSelection != null)
onLinkSelection.Invoke(linkID, linkText, linkIndex);
}
}
}