private static string FormatEmojiEntity(string targetText, TwitterEntityEmoji entity)
{
if (!SettingManager.Local.UseTwemoji)
{
return(t(e(targetText)));
}
return("<img class=\"emoji\" src=\"" + e(entity.Url) + "\" alt=\"" + e(entity.Text) + "\" />");
}
/// <summary>
/// テキストから絵文字を抽出して <see cref="TwitterEntityEmoji"/> として返します
/// </summary>
public static IEnumerable <TwitterEntityEmoji> ExtractEmojiEntities(string text)
{
var matches = TweetExtractor.EmojiPattern.Matches(text);
foreach (var match in matches.Cast <Match>())
{
var input = match.Value;
// 異字体セレクタ U+FE0F (emoji style) は除去する (ZWJ を含まない場合のみ)
if (!input.Contains('\u200D'))
{
input = input.Replace("\uFE0F", "");
}
var codepointHex = new List <string>();
for (var i = 0; i < input.Length; i += char.IsSurrogatePair(input, i) ? 2 : 1)
{
var codepoint = char.ConvertToUtf32(input, i);
codepointHex.Add($"{codepoint:x}");
}
var startPos = text.GetCodepointCount(0, match.Index);
var endPos = startPos + text.GetCodepointCount(match.Index, match.Index + match.Length);
TwitterEntityEmoji entity;
if (codepointHex.Count >= 1)
{
entity = new TwitterEntityEmoji
{
Indices = new[] { startPos, endPos },
Text = input,
Url = "https://twemoji.maxcdn.com/2/72x72/" + string.Join("-", codepointHex) + ".png",
};
}
else
{
entity = new TwitterEntityEmoji
{
Indices = new[] { startPos, endPos },
Text = input,
Url = "",
};
}
yield return(entity);
}
}
