/// <summary>
/// 處理縮排情境標籤：碰到縮排標籤時，將縮排次數更新至 ContextTagManager 物件，並移除此縮排標籤。
///
/// NOTE: 縮排標籤必須位於列首，一列可有多個連續縮排標籤，例如：＜縮排＞＜縮排＞。
/// </summary>
/// <param name="brDoc"></param>
/// <param name="lineIndex"></param>
/// <param name="context">情境物件。</param>
/// <returns></returns>
public void ProcessIndentTags(BrailleDocument brDoc, int lineIndex, ContextTagManager context)
{
BrailleLine brLine = brDoc.Lines[lineIndex];
int wordIdx = 0;
ContextTag ctag;
while (brLine.WordCount > 0)
{
ctag = context.Parse(brLine[0].Text, ContextTagNames.Indent);
if (ctag != null)
{
brLine.RemoveAt(wordIdx);
}
else
{
break;
}
}
}
