371 lines
11 KiB
C#
371 lines
11 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Text.RegularExpressions;
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using UnityEngine;
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using UnityEngine.Events;
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using UnityEngine.EventSystems;
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using UnityEngine.UI;
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public class UITextHref : Text, IPointerClickHandler
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{
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/// <summary>
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/// 图片池
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/// </summary>
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readonly List<Image> m_ImagesPool = new List<Image>();
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/// <summary>
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/// 图片的最后一个顶点的索引
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/// </summary>
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readonly List<int> m_ImagesVertexIndex = new List<int>();
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/// <summary>
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/// 超链接信息列表
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/// </summary>
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readonly List<HrefInfo> m_HrefInfos = new List<HrefInfo>();
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/// <summary>
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/// 解析完最终的文本
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/// </summary>
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string m_OutputText;
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bool clean = false;
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bool rebuilding = false;
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bool textDirty = false;
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/// <summary>
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/// 文本构造器
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/// </summary>
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readonly StringBuilder s_TextBuilder = new StringBuilder();
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/// <summary>
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/// 正则取出所需要的属性
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/// </summary>
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static readonly Regex s_Regex = new Regex(@"<quad name=(.+?) size=(\d*\.?\d+%?) width=(\d*\.?\d+%?) />", RegexOptions.Singleline);
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/// <summary>
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/// 超链接正则
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/// </summary>
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static readonly Regex s_HrefRegex = new Regex(@"<a href=([^>\n\s]+)>(.*?)(</a>)", RegexOptions.Singleline);
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/// <summary>
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/// 超链接点击事件
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/// </summary>
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public HrefClickEvent onHrefClick
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{
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get { return m_OnHrefClick; }
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set { m_OnHrefClick = value; }
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}
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[Serializable]
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public class HrefClickEvent : UnityEvent<string> { }
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[SerializeField]
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private HrefClickEvent m_OnHrefClick = new HrefClickEvent();
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/// <summary>
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/// 点击事件检测是否点击到超链接文本
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/// </summary>
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/// <param name="eventData"></param>
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public void OnPointerClick(PointerEventData eventData)
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{
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Vector2 lp = Vector2.zero;
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RectTransformUtility.ScreenPointToLocalPointInRectangle(
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rectTransform, eventData.position, eventData.pressEventCamera, out lp);
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foreach (var hrefInfo in m_HrefInfos)
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{
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var boxes = hrefInfo.boxes;
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for (var i = 0; i < boxes.Count; ++i)
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{
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if (boxes[i].Contains(lp))
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{
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m_OnHrefClick.Invoke(hrefInfo.name);
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return;
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}
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}
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}
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}
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public void SetText(string content)
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{
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text = content;
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if (text.Contains("<quad") && clean)
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textDirty = true;
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}
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/// <summary>
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/// 清理数据
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/// </summary>
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public void Clear()
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{
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clean = true;
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text = "";
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for(int idx = rectTransform.childCount- 1;idx >=0;idx--)
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GameObject.DestroyObject(rectTransform.GetChild(idx).gameObject);
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m_ImagesPool.Clear();
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m_ImagesVertexIndex.Clear();
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m_HrefInfos.Clear();
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s_TextBuilder.Remove(0, s_TextBuilder.Length);
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}
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float checkTime = 0;
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void LateUpdate()
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{
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if(textDirty && !rebuilding)
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{
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enabled = false;
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textDirty = false;
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enabled = true;
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}
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if (!textDirty && !rebuilding && (Time.time - checkTime) > 0.5f && !CheckImage())
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{
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enabled = false;
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checkTime = Time.time;
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enabled = true;
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}
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}
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public override void SetVerticesDirty()
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{
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base.SetVerticesDirty();
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UpdateQuadImage();
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}
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protected override void OnPopulateMesh(VertexHelper toFill)
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{
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var orignText = m_Text;
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m_Text = m_OutputText;
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base.OnPopulateMesh(toFill);
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m_Text = orignText;
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rebuilding = true;
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UIVertex vert = new UIVertex();
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for (var i = 0; i < m_ImagesVertexIndex.Count; i++)
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{
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var endIndex = m_ImagesVertexIndex[i];
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var rt = m_ImagesPool[i].rectTransform;
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if (rt == null) continue;
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var size = rt.sizeDelta;
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if (endIndex < toFill.currentVertCount)
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{
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toFill.PopulateUIVertex(ref vert, endIndex);
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float anchX = vert.position.x;
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float anchY = vert.position.y + size.y / 2;
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rt.anchoredPosition = new Vector2(anchX,anchY);
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// 抹掉左下角的小黑点
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toFill.PopulateUIVertex(ref vert, endIndex - 3);
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var pos = vert.position;
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for (int j = endIndex, m = endIndex - 3; j > m; j--)
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{
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toFill.PopulateUIVertex(ref vert, endIndex);
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vert.position = pos;
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toFill.SetUIVertex(vert, j);
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}
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}
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}
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if (m_ImagesVertexIndex.Count != 0)
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{
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m_ImagesVertexIndex.Clear();
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}
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// 处理超链接包围框
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foreach (var hrefInfo in m_HrefInfos)
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{
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hrefInfo.boxes.Clear();
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if (hrefInfo.startIndex >= toFill.currentVertCount)
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{
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continue;
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}
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// 将超链接里面的文本顶点索引坐标加入到包围框
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toFill.PopulateUIVertex(ref vert, hrefInfo.startIndex);
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var pos = vert.position;
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var bounds = new Bounds(pos, Vector3.zero);
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for (int i = hrefInfo.startIndex, m = hrefInfo.endIndex; i < m; i++)
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{
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if (i >= toFill.currentVertCount)
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{
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break;
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}
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toFill.PopulateUIVertex(ref vert, i);
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pos = vert.position;
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if (pos.x < bounds.min.x) // 换行重新添加包围框
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{
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hrefInfo.boxes.Add(new Rect(bounds.min, bounds.size));
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bounds = new Bounds(pos, Vector3.zero);
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}
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else
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{
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bounds.Encapsulate(pos); // 扩展包围框
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}
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}
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hrefInfo.boxes.Add(new Rect(bounds.min, bounds.size));
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}
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rebuilding = false;
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}
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protected void UpdateQuadImage()
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{
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#if UNITY_EDITOR
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if (UnityEditor.PrefabUtility.GetPrefabType(this) == UnityEditor.PrefabType.Prefab)
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{
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return;
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}
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#endif
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m_OutputText = GetOutputText();
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m_ImagesVertexIndex.Clear();
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foreach (Match match in s_Regex.Matches(m_OutputText))
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{
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var picIndex = match.Index;
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var endIndex = picIndex * 4 + 3;
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m_ImagesVertexIndex.Add(endIndex);
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m_ImagesPool.RemoveAll(image => image == null);
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if (m_ImagesPool.Count == 0)
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{
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GetComponentsInChildren<Image>(m_ImagesPool);
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}
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if (m_ImagesVertexIndex.Count > m_ImagesPool.Count)
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{
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var resources = new DefaultControls.Resources();
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var go = DefaultControls.CreateImage(resources);
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go.layer = gameObject.layer;
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var rt = go.transform as RectTransform;
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if (rt)
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{
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rt.anchorMin = rectTransform.anchorMin;
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rt.anchorMax = rectTransform.anchorMax;
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rt.pivot = rectTransform.pivot;
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rt.SetParent(rectTransform);
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rt.localPosition = Vector3.zero;
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rt.localRotation = Quaternion.identity;
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rt.localScale = Vector3.one;
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}
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m_ImagesPool.Add(go.GetComponent<Image>());
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}
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var spriteName = match.Groups[1].Value;
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var size = float.Parse(match.Groups[2].Value);
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var img = m_ImagesPool[m_ImagesVertexIndex.Count - 1];
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if (img.sprite == null || img.sprite.name != spriteName)
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{
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//img.sprite = UIUtility.LoadChatFace(spriteName);
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}
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img.rectTransform.sizeDelta = new Vector2(size, size);
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img.enabled = true;
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}
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for (var i = m_ImagesVertexIndex.Count; i < m_ImagesPool.Count; i++)
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{
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if (m_ImagesPool[i])
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{
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m_ImagesPool[i].enabled = false;
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}
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}
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}
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/// <summary>
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/// 获取超链接解析后的最后输出文本
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/// </summary>
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/// <returns></returns>
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protected string GetOutputText()
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{
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s_TextBuilder.Length = 0;
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m_HrefInfos.Clear();
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var indexText = 0;
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foreach (Match match in s_HrefRegex.Matches(text))
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{
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s_TextBuilder.Append(text.Substring(indexText, match.Index - indexText));
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s_TextBuilder.Append("<color=blue>"); // 超链接颜色
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var group = match.Groups[1];
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var hrefInfo = new HrefInfo
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{
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startIndex = s_TextBuilder.Length * 4, // 超链接里的文本起始顶点索引
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endIndex = (s_TextBuilder.Length + match.Groups[2].Length - 1) * 4 + 3,
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name = group.Value
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};
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m_HrefInfos.Add(hrefInfo);
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s_TextBuilder.Append(match.Groups[2].Value);
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s_TextBuilder.Append("</color>");
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indexText = match.Index + match.Length;
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}
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s_TextBuilder.Append(text.Substring(indexText, text.Length - indexText));
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return s_TextBuilder.ToString();
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}
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/// <summary>
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/// 超链接信息类
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/// </summary>
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private class HrefInfo
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{
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public int startIndex;
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public int endIndex;
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public string name;
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public readonly List<Rect> boxes = new List<Rect>();
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}
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/// <summary>
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/// 计算文本可能占用的宽度
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/// </summary>
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/// <param name="content"></param>
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/// <returns></returns>
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public float CalcWidth(string content)
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{
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string temp = content;
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float width = 0;
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foreach (var match in s_Regex.Matches(temp))
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{
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temp = temp.Replace(match.ToString(), "/表情");
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}
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font.RequestCharactersInTexture(temp, font.fontSize, FontStyle.Normal);
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CharacterInfo characterInfo;
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for (int idx = 0; idx < temp.Length; idx++)
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{
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font.GetCharacterInfo(temp[idx], out characterInfo, font.fontSize);
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width += characterInfo.advance;
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}
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return width;
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}
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/// <summary>
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/// 核对图片是否合法
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/// </summary>
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/// <returns></returns>
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bool CheckImage()
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{
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if (rectTransform.childCount == 0) return true;
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for (int idx = 0; idx < rectTransform.childCount; idx++)
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{
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Transform trans = rectTransform.GetChild(idx);
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if (trans.localPosition.x < 0) return false;
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}
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return true;
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}
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}
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