protected override void OnPopulateMesh(VertexHelper toFill)
{
if (font == null)
{
return;
}
if (EmojiIndex == null)
{
EmojiIndex = EmojiUtil.EmojiIndex;
}
if (EmojiIndex == null || EmojiIndex.Count == 0)
{
base.OnPopulateMesh(toFill);
return;
}
Dictionary <int, EmojiInfo> emojiDic = new Dictionary <int, EmojiInfo> ();
string resultText = string.Empty;
if (supportRichText)
{
List <EmojiElement> emojiList = EmojiUtil.getEmojiList(text, out resultText);
//Debug.Log("resultText:"+ resultText+",len:"+ resultText.Length);
//Debug.Log("emojiList:"+ emojiList.Count);
for (int i = 0, length = emojiList.Count; i < length; i++)
{
EmojiElement element = emojiList[i];
if (element.isEmoji)
{
EmojiInfo info;
string unicodeValue = element.unicode;
//Debug.Log("unicodeValue:" + unicodeValue + ",i:" + i);
if (EmojiIndex.TryGetValue(unicodeValue, out info))
{
//Debug.Log("1 unicodeValue:" + unicodeValue);
info.len = 1;
emojiDic.Add(i, info);
}
}
}
}
// We don't care if we the font Texture changes while we are doing our Update.
// The end result of cachedTextGenerator will be valid for this instance.
// Otherwise we can get issues like Case 619238.
m_DisableFontTextureRebuiltCallback = true;
Vector2 extents = rectTransform.rect.size;
var settings = GetGenerationSettings(extents);
if (supportRichText && !string.IsNullOrEmpty(resultText))
{
cachedTextGenerator.Populate(resultText, settings);
}
else
{
cachedTextGenerator.Populate(text, settings);
}
Rect inputRect = rectTransform.rect;
// get the text alignment anchor point for the text in local space
Vector2 textAnchorPivot = GetTextAnchorPivot(alignment);
Vector2 refPoint = Vector2.zero;
refPoint.x = Mathf.Lerp(inputRect.xMin, inputRect.xMax, textAnchorPivot.x);
refPoint.y = Mathf.Lerp(inputRect.yMin, inputRect.yMax, textAnchorPivot.y);
// Determine fraction of pixel to offset text mesh.
Vector2 roundingOffset = PixelAdjustPoint(refPoint) - refPoint;
// Apply the offset to the vertices
IList <UIVertex> verts = cachedTextGenerator.verts;
float unitsPerPixel = 1 / pixelsPerUnit;
//Last 4 verts are always a new line...
int vertCount = verts.Count - 4;
//Debug.Log("verts:" + verts.Count);
toFill.Clear();
if (roundingOffset != Vector2.zero)
{
for (int i = 0; i < vertCount; ++i)
{
int tempVertsIndex = i & 3;
m_TempVerts[tempVertsIndex] = verts[i];
m_TempVerts[tempVertsIndex].position *= unitsPerPixel;
m_TempVerts[tempVertsIndex].position.x += roundingOffset.x;
m_TempVerts[tempVertsIndex].position.y += roundingOffset.y;
if (tempVertsIndex == 3)
{
toFill.AddUIVertexQuad(m_TempVerts);
}
}
}
else
{
float repairDistance = 0;
float repairDistanceHalf = 0;
float repairY = 0;
if (vertCount > 0)
{
repairY = verts [3].position.y;
}
for (int i = 0; i < vertCount; ++i)
{
EmojiInfo info;
int index = i / 4;
if (emojiDic.TryGetValue(index, out info))
{
//compute the distance of '[' and get the distance of emoji
float charDis = (verts [i + 1].position.x - verts [i].position.x) * 3;
m_TempVerts [3] = verts [i]; //1
m_TempVerts [2] = verts [i + 1]; //2
m_TempVerts [1] = verts [i + 2]; //3
m_TempVerts [0] = verts [i + 3]; //4
//the real distance of an emoji
m_TempVerts [2].position += new Vector3(charDis, 0, 0);
m_TempVerts [1].position += new Vector3(charDis, 0, 0);
//make emoji has equal width and height
float fixValue = (m_TempVerts [2].position.x - m_TempVerts [3].position.x - (m_TempVerts [2].position.y - m_TempVerts [1].position.y));
m_TempVerts [2].position -= new Vector3(fixValue, 0, 0);
m_TempVerts [1].position -= new Vector3(fixValue, 0, 0);
float curRepairDis = 0;
if (verts [i].position.y < repairY) // to judge current char in the same line or not
{
repairDistance = repairDistanceHalf;
repairDistanceHalf = 0;
repairY = verts [i + 3].position.y;
}
curRepairDis = repairDistance;
int dot = 0; //repair next line distance
for (int j = info.len - 1; j > 0; j--)
{
if (verts [i + j * 4 + 3].position.y >= verts [i + 3].position.y)
{
repairDistance += verts [i + j * 4 + 1].position.x - m_TempVerts [2].position.x;
break;
}
else
{
dot = i + 4 * j;
}
}
if (dot > 0)
{
int nextChar = i + info.len * 4;
if (nextChar < verts.Count)
{
repairDistanceHalf = verts [nextChar].position.x - verts [dot].position.x;
}
}
//repair its distance
for (int j = 0; j < 4; j++)
{
m_TempVerts [j].position -= new Vector3(curRepairDis, 0, 0);
}
m_TempVerts [0].position *= unitsPerPixel;
m_TempVerts [1].position *= unitsPerPixel;
m_TempVerts [2].position *= unitsPerPixel;
m_TempVerts [3].position *= unitsPerPixel;
float pixelOffset = emojiDic [index].size / 32 / 2;
m_TempVerts [0].uv1 = new Vector2(emojiDic [index].x + pixelOffset, emojiDic [index].y + pixelOffset);
m_TempVerts [1].uv1 = new Vector2(emojiDic [index].x - pixelOffset + emojiDic [index].size, emojiDic [index].y + pixelOffset);
m_TempVerts [2].uv1 = new Vector2(emojiDic [index].x - pixelOffset + emojiDic [index].size, emojiDic [index].y - pixelOffset + emojiDic [index].size);
m_TempVerts [3].uv1 = new Vector2(emojiDic [index].x + pixelOffset, emojiDic [index].y - pixelOffset + emojiDic [index].size);
toFill.AddUIVertexQuad(m_TempVerts);
i += 4 * info.len - 1;
}
else
{
int tempVertsIndex = i & 3;
if (tempVertsIndex == 0 && verts [i].position.y < repairY)
{
repairY = verts [i + 3].position.y;
repairDistance = repairDistanceHalf;
repairDistanceHalf = 0;
}
m_TempVerts [tempVertsIndex] = verts [i];
m_TempVerts [tempVertsIndex].position -= new Vector3(repairDistance, 0, 0);
m_TempVerts [tempVertsIndex].position *= unitsPerPixel;
if (tempVertsIndex == 3)
{
toFill.AddUIVertexQuad(m_TempVerts);
}
}
}
}
m_DisableFontTextureRebuiltCallback = false;
}
/// <summary>
/// 将中文或者表情放到list中
/// 参考java的codePoint
/// 两个表情挨着的情况暂时没处理
/// out的resultText,将表情符号替换为█,用来计算Text的cachedTextGenerator
/// </summary>
public static List <EmojiElement> getEmojiList(string str, out string resultText)
{
resultText = str;
List <EmojiElement> arr = new List <EmojiElement>();
StringInfo si = new StringInfo(str);
StringBuilder builder = new StringBuilder();
int emojiCount = 0;
for (int i = 0; i < si.LengthInTextElements; i++)
{
string ele = si.SubstringByTextElements(i, 1);
string unicode = "0x" + toUnicode(ele);
//Debug.Log("i : " + i);
string nextUnicode = string.Empty;
if (i < si.LengthInTextElements - 1)
{
string element1 = si.SubstringByTextElements(i + 1, 1);
nextUnicode = "0x" + toUnicode(element1);
}
try
{
int e = Convert.ToInt32(unicode, 16);
bool isEmoji = isEmojiCharacter(e);
int nextInt = 0;
bool isNextEmoji = false;
if (!string.IsNullOrEmpty(nextUnicode))
{
nextInt = Convert.ToInt32(nextUnicode, 16);
isNextEmoji = isEmojiCharacter(nextInt);
}
if (isEmoji)
{
builder.Append(ele);
emojiCount++;
if (isGetEmoji(e, nextInt, emojiCount))
{
EmojiElement ee1 = new EmojiElement();
ee1.isEmoji = true;
ee1.unicode = toUnicode(builder.ToString());
ee1.originalText = builder.ToString();
resultText = resultText.Replace(ee1.originalText, replaceStr);
arr.Add(ee1);
builder.Remove(0, builder.Length);
emojiCount = 0;
}
}
else
{
if (!string.IsNullOrEmpty(builder.ToString()))
{
EmojiElement ee1 = new EmojiElement();
ee1.isEmoji = true;
ee1.unicode = toUnicode(builder.ToString());
ee1.originalText = builder.ToString();
resultText = resultText.Replace(ee1.originalText, replaceStr);
arr.Add(ee1);
builder.Remove(0, builder.Length);
emojiCount = 0;
}
EmojiElement ee = new EmojiElement();
ee.isEmoji = false;
arr.Add(ee);
}
if (i == si.LengthInTextElements - 1)
{
if (!string.IsNullOrEmpty(builder.ToString()))
{
EmojiElement ee1 = new EmojiElement();
ee1.isEmoji = true;
ee1.unicode = toUnicode(builder.ToString());
ee1.originalText = builder.ToString();
resultText = resultText.Replace(ee1.originalText, replaceStr);
arr.Add(ee1);
builder.Remove(0, builder.Length);
emojiCount = 0;
}
}
}
catch (Exception ex)
{
Debug.Log(ex.ToString());
}
}
return(arr);
}