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using System; using System.Collections.Generic; using System.Text; using System.Text.RegularExpressions; using UnityEngine; using UnityEngine.Events; using UnityEngine.EventSystems; using UnityEngine.UI; /// <summary> /// 文本控件,支持超链接、图片 /// </summary> [AddComponentMenu("UI/Text_Pro", 10)] public class Text_Pro : Text, IPointerClickHandler { /// <summary> /// 解析完最终的文本 /// </summary> private string m_OutputText; /// <summary> /// 图片池 /// </summary> protected readonly List<Image> m_ImagesPool = new List<Image>(); /// <summary> /// 图片的最后一个顶点的索引 /// </summary> private readonly List<int> m_ImagesVertexIndex = new List<int>(); /// <summary> /// 超链接信息列表 /// </summary> private readonly List<HrefInfo> m_HrefInfos = new List<HrefInfo>(); /// <summary> /// 文本构造器 /// </summary> protected static readonly StringBuilder s_TextBuilder = new StringBuilder(); [Serializable] public class HrefClickEvent : UnityEvent<string> { } [SerializeField] private HrefClickEvent m_OnHrefClick = new HrefClickEvent(); /// <summary> /// 超链接点击事件 /// </summary> public HrefClickEvent onHrefClick { get { return m_OnHrefClick; } set { m_OnHrefClick = value; } } /// <summary> /// 正则-图片 /// </summary> private static readonly Regex s_ImageRegex = new Regex(@"<quad name=(.+?) size=(d*.?d+%?) width=(d*.?d+%?) />", RegexOptions.Singleline); /// <summary> /// 正则-超链接 /// </summary> private static readonly Regex s_HrefRegex = new Regex(@"<a href=([^> s]+)>(.*?)(</a>)", RegexOptions.Singleline); /// <summary> /// 加载精灵图片方法 /// </summary> public static Func<string, Sprite> funLoadSprite; public override void SetVerticesDirty() { base.SetVerticesDirty(); UpdateQuadImage(); } protected void UpdateQuadImage() { #if UNITY_EDITOR if (UnityEditor.PrefabUtility.GetPrefabType(this) == UnityEditor.PrefabType.Prefab) { return; } #endif m_OutputText = GetOutputText(text); m_ImagesVertexIndex.Clear(); foreach (Match match in s_ImageRegex.Matches(m_OutputText)) { var picIndex = match.Index; var endIndex = picIndex * 4 + 3; m_ImagesVertexIndex.Add(endIndex); m_ImagesPool.RemoveAll(image => image == null); if (m_ImagesPool.Count == 0) { GetComponentsInChildren<Image>(m_ImagesPool); } if (m_ImagesVertexIndex.Count > m_ImagesPool.Count) { var resources = new DefaultControls.Resources(); var go = DefaultControls.CreateImage(resources); go.layer = gameObject.layer; var rt = go.transform as RectTransform; if (rt) { rt.SetParent(rectTransform); rt.localPosition = Vector3.zero; rt.localRotation = Quaternion.identity; rt.localScale = Vector3.one; } m_ImagesPool.Add(go.GetComponent<Image>()); } var spriteName = match.Groups[1].Value; var size = float.Parse(match.Groups[2].Value); var img = m_ImagesPool[m_ImagesVertexIndex.Count - 1]; if (img.sprite == null || img.sprite.name != spriteName) { img.sprite = funLoadSprite != null ? funLoadSprite(spriteName) : Resources.Load<Sprite>(spriteName); } img.rectTransform.sizeDelta = new Vector2(size, size); img.enabled = true; } for (var i = m_ImagesVertexIndex.Count; i < m_ImagesPool.Count; i++) { if (m_ImagesPool[i]) { m_ImagesPool[i].enabled = false; } } } protected override void OnPopulateMesh(VertexHelper toFill) { var orignText = m_Text; m_Text = m_OutputText; base.OnPopulateMesh(toFill); m_Text = orignText; UIVertex vert = new UIVertex(); for (var i = 0; i < m_ImagesVertexIndex.Count; i++) { var endIndex = m_ImagesVertexIndex[i]; var rt = m_ImagesPool[i].rectTransform; var size = rt.sizeDelta; if (endIndex < toFill.currentVertCount) { toFill.PopulateUIVertex(ref vert, endIndex); rt.anchoredPosition = new Vector2(vert.position.x + size.x / 2, vert.position.y + size.y / 2); // 抹掉左下角的小黑点 toFill.PopulateUIVertex(ref vert, endIndex - 3); var pos = vert.position; for (int j = endIndex, m = endIndex - 3; j > m; j--) { toFill.PopulateUIVertex(ref vert, endIndex); vert.position = pos; toFill.SetUIVertex(vert, j); } } } if (m_ImagesVertexIndex.Count != 0) { m_ImagesVertexIndex.Clear(); } // 处理超链接包围框 foreach (var hrefInfo in m_HrefInfos) { hrefInfo.boxes.Clear(); if (hrefInfo.startIndex >= 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, hrefInfo.startIndex); var pos = vert.position; var bounds = new Bounds(pos, Vector3.zero); for (int i = hrefInfo.startIndex, m = hrefInfo.endIndex; i < m; 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.boxes.Add(new Rect(bounds.min, bounds.size)); bounds = new Bounds(pos, Vector3.zero); } else { bounds.Encapsulate(pos); // 扩展包围框 } } hrefInfo.boxes.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> protected virtual string GetOutputText(string outputText) { s_TextBuilder.Length = 0; m_HrefInfos.Clear(); var indexText = 0; foreach (Match match in s_HrefRegex.Matches(outputText)) { s_TextBuilder.Append(outputText.Substring(indexText, match.Index - indexText)); s_TextBuilder.Append("<color=blue>"); // 超链接颜色 var group = match.Groups[1]; var hrefInfo = new HrefInfo { startIndex = s_TextBuilder.Length * 4, // 超链接里的文本起始顶点索引 endIndex = (s_TextBuilder.Length + match.Groups[2].Length - 1) * 4 + 3, name = group.Value }; m_HrefInfos.Add(hrefInfo); s_TextBuilder.Append(match.Groups[2].Value); s_TextBuilder.Append("</color>"); indexText = match.Index + match.Length; } s_TextBuilder.Append(outputText.Substring(indexText, outputText.Length - indexText)); return s_TextBuilder.ToString(); } /// <summary> /// 点击事件检测是否点击到超链接文本 /// </summary> /// <param name="eventData"></param> public void OnPointerClick(PointerEventData eventData) { Vector2 lp; RectTransformUtility.ScreenPointToLocalPointInRectangle( rectTransform, eventData.position, eventData.pressEventCamera, out lp); foreach (var hrefInfo in m_HrefInfos) { var boxes = hrefInfo.boxes; for (var i = 0; i < boxes.Count; ++i) { if (boxes[i].Contains(lp)) { m_OnHrefClick.Invoke(hrefInfo.name); return; } } } } /// <summary> /// 超链接信息类 /// </summary> private class HrefInfo { public int startIndex; public int endIndex; public string name; public readonly List<Rect> boxes = new List<Rect>(); } }
作者:无幻