Sprite and/or Rich Text tags in TextMesh label is stopping character animations

[cellininicholas]

My character animations are getting as far as the character I have in my text. I'm even skipping the sprite character animation setup.

for (int i = 0; i < tweener.CharacterCount; i++)
{
    TMP_CharacterInfo charInfo = textInfo.characterInfo[i];
    if (charInfo.elementType == TMP_TextElementType.Sprite) {
        Debug.LogWarning($"TMP_TextElementType.Sprite character");
        continue;
    }
    // Character animation setup comes next...
                
}

I've found that if I edit the Text live in the Editor and delete the Sprite, the animations for all the characters suddenly start working. Any tips?

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Update 1 In fact, it looks like that is the case with all Rich Text Tags in my TextMeshPro label...

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Update 2 I've discovered that in CharTweener::UpdateCharPositions() There is a check which is skipping characters after a Sprite character...

for (var i = proxyTransformList.Count - 1; i >= 0; i--)
{
    // ...
    if (proxy.CharIndex >= characterCount)
        continue;
    // ...
}

Looks like proxy.CharIndex is referencing the index of characters BEFORE Rich Text Tags are passed and characterCount uses the count AFTER Rich Text Tags are passed.

[cellininicholas]

Alright I figured out a solution that got it working with Sprites present. I'm too lazy to make a pull request, so if anyone wants to make the change or find the solution, here it is:

In CharTweener.cs, modify AssignCharInfo(TMP_CharacterInfo charInfo) to the following

public void AssignCharInfo(TMP_CharacterInfo charInfo, int parsedCharIndex)
{
    // charIndex = charInfo.index;
    charIndex = parsedCharIndex;
    
    // ...            
}

Then, anytime AssignCharInfo() is called, pass the non-raw character index. That means changing the two calls in UpdateStartPositions() to...

proxy.AssignCharInfo(charInfo[pair.Key], charIndex);

Sprites and all following characters worked for me after that. I assume this also fixes any labels that contain Rich Text.