//Second Step:
//When label is rebuilding, NGUIText processes every character of text one by one and check if a symbol or emoji matched.
//If an emoji is matched, NGUIText will replace the matched string sequence with the matched symbol or emoji.
//Here we can obtain the "current position" information in current label building progress(these values are localBottomLeft,localTopRight,colorTint).
public RunTimeEmoji MatchEmoji(string text, int offset, int textLength)
{
if (!label.HasDynamicEmoji)
{
return null;
}
//Reuse showing emojis.
//The most important thing is that the playing progress of emoji uv animation MUST NOT be broken after label is rebuilt.
RunTimeEmoji matched = null;
//Seek from showingEmojis,If matched, it will keep active and the UV playing progress will not be broken.
for (int i = 0; i < showingEmojis.Count; i++)
{
var runTimeEmoji = showingEmojis[i];
if (runTimeEmoji.emojiData.Match(text, offset, textLength))
{
matched = runTimeEmoji;
showingEmojis.Remove(runTimeEmoji);
break;
}
}
//Seek from pool
if (matched == null)
{
for (int i = 0; i < emojiPool.Count; i++)
{
var runTimeEmoji = emojiPool[i];
if (runTimeEmoji.emojiData.Match(text, offset, textLength))
{
matched = runTimeEmoji;
emojiPool.Remove(runTimeEmoji);
break;
}
}
}
if (matched == null)
{
//The emoji haven't been created.
//Create new runtime emoji.
UiEmojiData matchedEmojiData = label.EmojiSlot.MatchEmoji(text, offset, textLength);
if (matchedEmojiData == null)
{
return null;
}
#if UNITY_EDITOR
//if sprite uvAnimation contains invalid configuration.
if (!matchedEmojiData.ValidateAllSprite())
{
return null;
}
#endif
if (matchedEmojiData == null || (!matchedEmojiData.IsValid))
{
return null;
}
matched = new RunTimeEmoji();
matched.emojiData = matchedEmojiData;
matched.sprite0Data = matchedEmojiData.GetFirstSpriteData();
}
return matched;
}
//Step 3:
//Records all the matched or unmatched emojis for post processing
public void AddPreparedEmoji(RunTimeEmoji matched)
{
preparedEmojis.Add(matched);
}
