public void OnPointerClick(PointerEventData eventData)
{
Vector2 localPos;
RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform, eventData.position, eventData.pressEventCamera, out localPos);
for (int i = eventList.Count - 1; i >= 0; i--)
{
RichTextEvent e = eventList[i];
if (e.rect.Contains(localPos))
{
clickAction.Invoke(e.name, e.parameter);
break;
}
}
}
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);
}
}
}
protected string CalculateLayoutWithImage(string richText, out IList <UIVertex> verts)
{
Vector2 extents = rectTransform.rect.size;
var settings = GetGenerationSettings(extents);
float unitsPerPixel = 1 / pixelsPerUnit;
float spaceWidth = cachedTextGenerator.GetPreferredWidth(replaceStr, settings) * unitsPerPixel;
float fontSize2 = fontSize * 0.5f;
//解析图片标签，并将标签替换为空格
imageInfoList.Clear();
Match match = null;
StringBuilder builder = new StringBuilder();
while ((match = imageTagRegex.Match(richText)).Success)
{
RichTextImageInfo imageInfo = new RichTextImageInfo();
imageInfo.name = match.Groups[1].Value;
string paras = match.Groups[2].Value;
if (!string.IsNullOrEmpty(paras))
{
var keyValueCollection = imageParaRegex.Matches(paras);
for (int i = 0; i < keyValueCollection.Count; i++)
{
string key = keyValueCollection[i].Groups[1].Value;
string value = keyValueCollection[i].Groups[2].Value;
imageInfo.SetValue(key, value);
}
}
imageInfo.size = new Vector2(fontSize2 * imageInfo.widthScale, fontSize2 * imageInfo.heightScale);
imageInfo.startVertex = match.Index * 4;
int num = Mathf.CeilToInt(imageInfo.size.x / spaceWidth);//占据几个空格
imageInfo.vertexLength = num * 4;
imageInfoList.Add(imageInfo);
builder.Length = 0;
builder.Append(richText, 0, match.Index);
for (int i = 0; i < num; i++)
{
builder.Append(replaceStr);
}
builder.Append(richText, match.Index + match.Length, richText.Length - match.Index - match.Length);
richText = builder.ToString();
}
// Populate charaters
cachedTextGenerator.Populate(richText, settings);
verts = cachedTextGenerator.verts;
// Last 4 verts are always a new line...
int vertCount = verts.Count - 4;
//换行处理
//0 1|4 5|8 9
//3 2|7 6|11 10
//例如前两个字为图片标签，第三字为普通文字；那么startVertex为0，vertexLength为8
for (int i = 0; i < imageInfoList.Count; i++)
{
RichTextImageInfo imageInfo = imageInfoList[i];
int startVertex = imageInfo.startVertex;
int vertexLength = imageInfo.vertexLength;
int maxVertex = Mathf.Min(startVertex + vertexLength, vertCount);
//如果最边缘顶点超过了显示范围，则将图片移到下一行
//之后的图片信息中的起始顶点都往后移
if (verts[maxVertex - 2].position.x * unitsPerPixel > rectTransform.rect.xMax) //所有空格在同一行
{
richText = richText.Insert(startVertex / 4, "\r\n");
for (int j = i; j < imageInfoList.Count; j++)
{
imageInfoList[j].startVertex += 8;
}
cachedTextGenerator.Populate(richText, settings);
verts = cachedTextGenerator.verts;
vertCount = verts.Count - 4;
}
else //空格不在同一行
{
float lastX = verts[startVertex].position.x;
for (int j = startVertex + 4; j < startVertex + vertexLength; j += 4)
{
if (verts[j].position.x < lastX)
{
richText = richText.Insert(startVertex / 4, "\r\n");
for (int k = i; k < imageInfoList.Count; k++)
{
imageInfoList[k].startVertex += 8;
}
cachedTextGenerator.Populate(richText, settings);
verts = cachedTextGenerator.verts;
vertCount = verts.Count - 4;
break;
}
else
{
lastX = verts[j].position.x;
}
}
}
}
//计算位置
for (int i = imageInfoList.Count - 1; i >= 0; i--)
{
RichTextImageInfo imageInfo = imageInfoList[i];
int startVertex = imageInfo.startVertex;
if (startVertex < vertCount)
{
UIVertex uiVertex = verts[startVertex];
Vector2 pos = uiVertex.position;
pos *= unitsPerPixel;
pos += new Vector2(imageInfo.size.x * 0.5f, fontSize2 * 0.5f);
pos += new Vector2(rectTransform.sizeDelta.x * (rectTransform.pivot.x - 0.5f), rectTransform.sizeDelta.y * (rectTransform.pivot.y - 0.5f));
imageInfo.position = pos;
imageInfo.color = Color.white;
if (!string.IsNullOrEmpty(imageInfo.eventName))
{
//图片pos：
//x:起点x + 图片宽度的一半
//y:起点y + fontSize2 * 0.5f
RichTextEvent e = new RichTextEvent();
e.name = imageInfo.eventName;
e.parameter = imageInfo.eventParameter;
e.rect = new Rect(
verts[startVertex].position.x * unitsPerPixel,
verts[startVertex].position.y * unitsPerPixel + fontSize2 * 0.5f - imageInfo.size.y * 0.5f,
imageInfo.size.x,
imageInfo.size.y
);
eventList.Add(e);
}
}
else
{
imageInfoList.RemoveAt(i);
}
}
isImageDirty = true;
return(richText);
}
