public RichTextTag Parse()
{
RichTextTag tag = null;
Match match = tagRegex.Match(content);
if (match.Success)
{
string tagName = match.Groups[1].Value;//标签类型
if (!tagName.StartsWith("#"))
{
var keyValueCollection = paraRegex.Matches(match.Groups[2].Value);//标签参数
switch (tagName)
{
case "underline":
{
tag = new RichTextUnderlineTag();
break;
}
default:
break;
}
if (tag != null)
{
tag.start = start;
tag.end = end;
for (int i = 0; i < keyValueCollection.Count; i++)
{
string key = keyValueCollection[i].Groups[1].Value;
string value = keyValueCollection[i].Groups[2].Value;
tag.SetValue(key, value);
}
}
}
}
return(tag);
}
private void ApplyUnderlineEffect(RichTextUnderlineTag tag, IList <UIVertex> verts)
{
float fontSize2 = fontSize * 0.5f;
float unitsPerPixel = 1 / pixelsPerUnit;
//0 1|4 5|8 9 |12 13
//3 2|7 6|11 10|14 15
//<material=underline c=#ffffff h=1 n=1 p=2>下划线</material>
//以上面为例:
//tag.start为42，对应“>” | start对应“下”的左上角顶点
//tag.end为44，对应“划” | end对应“线”下一个字符的左上角顶点
//Debug.Log(tag.start);
//Debug.Log(tag.end);
int start = tag.start * 4;
int end = Mathf.Min(tag.end * 4 + 4, verts.Count);
UIVertex vt1 = verts[start + 3];
UIVertex vt2;
float minY = vt1.position.y;
float maxY = verts[start].position.y;
//换行处理，如需换行，则将一条下划线分割成几条
//顶点取样分布，如上图的2，6，10，其中end - 2表示最后一个取样点，即10
//对应例子中的下、划、线的右下角顶点
for (int i = start + 2; i <= end - 2; i += 4)
{
vt2 = verts[i];
bool newline = Mathf.Abs(vt2.position.y - vt1.position.y) > fontSize2;
if (newline || i == end - 2)
{
RichTextImageInfo imageInfo = new RichTextImageInfo();
//计算宽高
int tailIndex = !newline && i == end - 2 ? i : i - 4;
vt2 = verts[tailIndex];
minY = Mathf.Min(minY, vt2.position.y);
maxY = Mathf.Max(maxY, verts[tailIndex - 1].position.y);
imageInfo.size = new Vector2((vt2.position.x - vt1.position.x) * unitsPerPixel, tag.height);
//计算位置
Vector2 vertex = new Vector2(vt1.position.x, minY);
vertex *= unitsPerPixel;
vertex += new Vector2(imageInfo.size.x * 0.5f, -tag.height * 0.5f);
vertex += new Vector2(rectTransform.sizeDelta.x * (rectTransform.pivot.x - 0.5f), rectTransform.sizeDelta.y * (rectTransform.pivot.y - 0.5f));
imageInfo.position = vertex;
imageInfo.color = tag.color;
imageInfoList.Add(imageInfo);
if (!string.IsNullOrEmpty(tag.eventName))
{
//下划线pos：
//x:vt1.x + 图片宽度的一半
//y:minY - tag.height * 0.5f
RichTextEvent e = new RichTextEvent();
e.name = tag.eventName;
e.parameter = tag.eventParameter;
e.rect = new Rect(
vt1.position.x * unitsPerPixel,
minY * unitsPerPixel,
imageInfo.size.x,
(maxY - minY) * unitsPerPixel
);
eventList.Add(e);
}
vt1 = verts[i + 1];
minY = vt1.position.y;
if (newline && i == end - 2)
{
i -= 4;
}
}
else
{
minY = Mathf.Min(minY, verts[i].position.y);
maxY = Mathf.Max(maxY, verts[i - 1].position.y);
}
}
}
