Unity超链接：支持点击事件，下划线以及自定义颜色
/*
/zyf2533/article/details/122703640
*/
using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
using UnityEngine;
using UnityEngine.EventSystems;
//using ;
namespace UnityEngine.UI
{
[AddComponentMenu("UI/UIHyperlinkText")]
/// <summary>
/// eg:
/// 获得了：<a href="Tip#1102201">先锋盾合成卷轴</a>
/// </summary>
public class UIHyperlinkText : 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 RefValue;
public string InnerValue;
//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);
private static Regex colorPreRegex = new Regex(@"<color=([^>\n\s]+)>", RegexOptions.Singleline);
private static Regex colorEndRegex = new Regex(@"</color>", RegexOptions.Singleline);
//超链接信息列表
private List<HyperlinkInfo> hyperlinkInfoList = new List<HyperlinkInfo>();
private static Action<string, string> clickCallback = null;
private static Color innerTextColor = Color.blue;
#endregion
#region 公有变量
#endregion
#region 生命周期
protected override void OnPopulateMesh(VertexHelper toFill)
{
base.OnPopulateMesh(toFill);
InitHyperlinkInfo();
InitHyperlinkBox(toFill);
DrawUnderLine(toFill);
}
#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))
{
if (clickCallback != null)
{
clickCallback(hyperlinkInfo.RefValue, hyperlinkInfo.InnerValue);
}
return;
}
}
}
}
public static void RegisterClickCallback(Action<string, string> callback, string innerColor)
{
clickCallback = callback;
if (!innerColor.StartsWith("#"))
{
innerColor = "#" + innerColor;
}
Color nowColor;
ColorUtility.TryParseHtmlString(innerColor, out nowColor);
innerTextColor = nowColor;
}
#endregion
#region 私有方法
/// <summary>
/// 初始化连接信息
/// </summary>
private void InitHyperlinkInfo()
{
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);
//(vert, i);
pos = vert.position;
bool needEncapsulate = true;
if ((i - startVertex) % 4 == 0)
{
if (i < 4) continue;
UIVertex lastV = new UIVertex();
toFill.PopulateUIVertex(ref lastV, i - 4);
var lastPos = lastV.position;
if (pos.x < lastPos.x && pos.y < lastPos.y) // 换行重新添加包围框
{
hrefInfo.BoxList.Add(new Rect(bounds.min, bounds.size));
bounds = new Bounds(pos, Vector3.zero);
needEncapsulate = false;
}
}
if (needEncapsulate)
{
bounds.Encapsulate(pos); // 扩展包围框
}
}
hrefInfo.BoxList.Add(new Rect(bounds.min, bounds.size));
}
}
private void DrawUnderLine(VertexHelper vh)
{
foreach (var link in hyperlinkInfoList)
{
foreach (var rect in link.BoxList)
{
float height = rect.height;
// 左下
var pos1 = new Vector3(rect.min.x, rect.min.y, 0);
// 右下
var pos2 = new Vector3(rect.max.x, rect.max.y, 0) - new Vector3(0, height, 0);
MeshUnderLine(vh, pos1, pos2);
}
}
}
private void MeshUnderLine(VertexHelper vh, Vector2 startPos, Vector2 endPos)
{
Vector2 extents = rectTransform.rect.size;
var setting = GetGenerationSettings(extents);
TextGenerator underlineText = new TextGenerator();
underlineText.Populate("￣", setting);
IList<UIVertex> lineVer = underlineText.verts; //"￣"的的顶点数组
Vector3[] pos = new Vector3[4];
pos[0] = startPos + new Vector2(-8, 0);
pos[3] = startPos + new Vector2(-8, -4f);
pos[2] = endPos + new Vector2(8, -4f);
pos[1] = endPos + new Vector2(8, 0);
if (lineVer.Count == 4)
{
UIVertex[] tempVerts = new UIVertex[4];
for (int i = 0; i < 4; i++)
{
tempVerts[i] = lineVer[i];
tempVerts[i].color = Color.white;
tempVerts[i].position = pos[i];
tempVerts[i].uv0 = lineVer[i].uv0;
tempVerts[i].uv1 = lineVer[i].uv1;
tempVerts[i].uv2 = lineVer[i].uv2;
tempVerts[i].uv3 = lineVer[i].uv3;
}
vh.AddUIVertexQuad(tempVerts);
}
}
/// <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);
//空格和回车没有顶点渲染，所以要去掉
appendStr = appendStr.Replace(" ", "");
appendStr = appendStr.Replace("\n", "");
appendStr = RichStringFilter(appendStr);
stringBuilder.Append(appendStr);
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，直到把最终文本扒出来
Match colorMatch = colorRegex.Match(titleGroup.Value);
if (colorMatch.Groups.Count > 3)
{
titleGroup = colorMatch.Groups[2];
}
var inner = titleGroup.Value;
inner = inner.Replace(" ", "");
inner = inner.Replace("\n", "");
stringBuilder.Append(inner);
HyperlinkInfo hyperlinkInfo = new HyperlinkInfo
{
StartIndex = startIndex,
EndIndex = (startIndex + inner.Length),
RefValue = urlGroup.Value,
InnerValue = titleGroup.Value,
};
strIndex = match.Index + match.Length;
hyperlinkInfoList.Add(hyperlinkInfo);
}
stringBuilder.Append(outputText.Substring(strIndex, outputText.Length - strIndex));
return stringBuilder.ToString();
}
private string RichStringFilter(string outputText)
{
outputText = colorPreRegex.Replace(outputText, "");
outputText = colorEndRegex.Replace(outputText, "");
return outputText;
}
#endregion
/// <summary>
/// 添加可视包围框（测试用方法）
/// </summary>
private void AddVisibleBound()
{
int index = 0;
foreach (Transform item in this.gameObject.transform.transform)
{
Destroy(item.gameObject);
}
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.InnerValue);
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;
}
}
}
}
}