富文本

Assets/BowArrow/Scripts/Components/HyperlinkText.cs

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+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Text;
+using System.Text.RegularExpressions;
+using UnityEngine;
+using UnityEngine.Events;
+using UnityEngine.EventSystems;
+using UnityEngine.UI;
+
+/// <summary>
+/// TextHyperlink 支持Unity超链接富文本语法
+/// 例如<a href=https://aws.amazon.com/privacy/>https://aws.amazon.com/privacy/</a>
+/// 带颜色的超链接：
+/// <a href=https://aws.amazon.com/privacy/><color=#FF0000>https://aws.amazon.com/privacy/</color></a>
+/// </summary>
+public class HyperlinkText : Text, IPointerClickHandler
+{
+    /// <summary>
+    /// 超链接信息类
+    /// </summary>
+    private class HyperlinkInfo
+    {
+        //起始Index
+        public int StartIndex;
+        //结束Index
+        public int EndIndex;
+        //内容
+        public string Name;
+        //包围框
+        public List<Rect> BoxList = new List<Rect>();
+    }
+
+    #region 私有变量
+    //超链接正则
+    private static Regex _hrefRegex = new Regex(@"<a href=([^>\n\s]+)>(.*?)(</a>)", RegexOptions.Singleline);
+    //颜色正则
+    private static Regex _colorRegex = new Regex(@"<color=([^>\n\s]+)>(.*?)(</color>)", RegexOptions.Singleline);
+    //超链接信息列表
+    private List<HyperlinkInfo> _hyperlinkInfoList = new List<HyperlinkInfo>();
+    //显示包围盒范围，想用的话输入true
+    private bool _showTestBound = true;
+    #endregion
+
+    #region 公有变量
+
+    #endregion
+
+    #region 生命周期
+    protected override void OnPopulateMesh(VertexHelper toFill)
+    {
+        base.OnPopulateMesh(toFill);
+
+        InitHyperlinkInfo();
+
+        InitHyperlinkBox(toFill);
+    }
+
+    protected override void Start()
+    {
+        if (_showTestBound)
+        {
+            AddVisibleBound();
+        }
+    }
+    #endregion
+
+    #region 公有方法
+
+    #endregion
+
+    #region 动作
+    public void OnPointerClick(PointerEventData eventData)
+    {
+        Vector2 localPoint;
+        RectTransformUtility.ScreenPointToLocalPointInRectangle(
+            rectTransform, eventData.position, eventData.pressEventCamera, out localPoint);
+
+        foreach (HyperlinkInfo hyperlinkInfo in _hyperlinkInfoList)
+        {
+            var boxeList = hyperlinkInfo.BoxList;
+            for (var i = 0; i < boxeList.Count; ++i)
+            {
+                if (boxeList[i].Contains(localPoint))
+                {
+                    //打开网址
+                    //this.Log("TextHyperlink", hyperlinkInfo.Name);
+                    // Application.OpenURL(hyperlinkInfo.Name);
+                    Debug.Log(hyperlinkInfo.Name);
+                    return;
+                }
+            }
+        }
+    }
+    #endregion
+
+    #region 私有方法
+    /// <summary>
+    /// 初始化连接信息
+    /// </summary>
+    private void InitHyperlinkInfo()
+    {
+        //这个值不用,就是个存根。要的是执行后面那个方法
+        string outputText = GetOutputText(text);
+    }
+
+    /// <summary>
+    /// 初始化连接包围框
+    /// </summary>
+    /// <param name="toFill"></param>
+    private void InitHyperlinkBox(VertexHelper toFill)
+    {
+        UIVertex vert = new UIVertex();
+
+        // 处理超链接包围框
+        foreach (var hrefInfo in _hyperlinkInfoList)
+        {
+            hrefInfo.BoxList.Clear();
+
+            //一个字符是四个顶点，所以Index要乘以4
+            int startVertex = hrefInfo.StartIndex * 4;
+            int endVertex = hrefInfo.EndIndex * 4;
+
+            if (startVertex >= toFill.currentVertCount)
+            {
+                continue;
+            }
+
+            // 将超链接里面的文本顶点索引坐标加入到包围框
+            toFill.PopulateUIVertex(ref vert, startVertex);
+            var pos = vert.position;
+            var bounds = new Bounds(pos, Vector3.zero);
+            for (int i = startVertex; i < endVertex; i++)
+            {
+                if (i >= toFill.currentVertCount)
+                {
+                    break;
+                }
+
+                toFill.PopulateUIVertex(ref vert, i);
+                pos = vert.position;
+                if (pos.x < bounds.min.x) // 换行重新添加包围框
+                {
+                    hrefInfo.BoxList.Add(new Rect(bounds.min, bounds.size));
+                    bounds = new Bounds(pos, Vector3.zero);
+                }
+                else
+                {
+                    bounds.Encapsulate(pos); // 扩展包围框
+                }
+            }
+
+            hrefInfo.BoxList.Add(new Rect(bounds.min, bounds.size));
+        }
+    }
+
+    /// <summary>
+    /// 获取超链接解析后的最后输出文本
+    /// </summary>
+    /// <returns></returns>
+    private string GetOutputText(string outputText)
+    {
+        StringBuilder stringBuilder = new StringBuilder();
+
+        _hyperlinkInfoList.Clear();
+
+        int strIndex = 0;
+
+        foreach (Match match in _hrefRegex.Matches(outputText))
+        {
+            string appendStr = outputText.Substring(strIndex, match.Index - strIndex);
+            stringBuilder.Append(appendStr);
+
+            //空格和回车没有顶点渲染，所以要去掉
+            stringBuilder = stringBuilder.Replace(" ", "");
+            stringBuilder = stringBuilder.Replace("\n", "");
+
+            int startIndex = stringBuilder.Length;
+
+            //第一个是连接url,第二个是连接文本，跳转用url，计算index用文本
+            Group urlGroup = match.Groups[1];
+            Group titleGroup = match.Groups[2];
+
+            //如果有Color语法嵌套，则还要继续扒，知道吧最终文本扒出来
+            Match colorMatch = _colorRegex.Match(titleGroup.Value);
+
+            if (colorMatch.Groups.Count > 3)
+            {
+                titleGroup = colorMatch.Groups[2];
+            }
+
+            stringBuilder.Append(titleGroup.Value);
+
+            HyperlinkInfo hyperlinkInfo = new HyperlinkInfo
+            {
+                StartIndex = startIndex, 
+                EndIndex = (startIndex + titleGroup.Length),
+                Name = urlGroup.Value
+            };
+
+            strIndex = match.Index + match.Length;
+            _hyperlinkInfoList.Add(hyperlinkInfo);
+        }
+        stringBuilder.Append(outputText.Substring(strIndex, outputText.Length - strIndex));
+        return stringBuilder.ToString();
+    }
+
+    /// <summary>
+    /// 添加可视包围框（测试用方法）
+    /// </summary>
+    private void AddVisibleBound()
+    {
+        int index = 0;
+
+        foreach (var hyperLinkInfo in _hyperlinkInfoList)
+        {
+            Color color = new Color(UnityEngine.Random.Range(0f, 1f), UnityEngine.Random.Range(0f, 1f), UnityEngine.Random.Range(0f, 1f), 0.2f);
+            index++;
+            foreach (Rect rect in hyperLinkInfo.BoxList)
+            {
+                GameObject gameObject = new GameObject();
+                gameObject.name = string.Format("GOBoundBox[{0}]", hyperLinkInfo.Name);
+                gameObject.transform.SetParent(this.gameObject.transform);
+
+                RectTransform rectTransform = gameObject.AddComponent<RectTransform>();
+                rectTransform.sizeDelta = rect.size;
+                rectTransform.localPosition = new Vector3(rect.position.x + rect.size.x / 2, rect.position.y + rect.size.y / 2, 0);
+
+                Image image = gameObject.AddComponent<Image>();
+                image.color = color;
+                image.raycastTarget = false;
+            }
+        }
+    }
+    #endregion
+}
+

Assets/BowArrow/Scripts/Components/HyperlinkText.cs.meta

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