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