321 lines
10 KiB
Java
321 lines
10 KiB
Java
package jp.juggler.subwaytooter.util;
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import android.content.Context;
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import android.support.annotation.DrawableRes;
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import android.support.annotation.NonNull;
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import android.text.Spannable;
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import android.text.SpannableStringBuilder;
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import android.text.Spanned;
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import android.text.TextUtils;
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import java.util.ArrayList;
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import java.util.regex.Pattern;
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import jp.juggler.subwaytooter.App1;
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import jp.juggler.subwaytooter.R;
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import jp.juggler.subwaytooter.api.entity.CustomEmoji;
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import jp.juggler.subwaytooter.api.entity.NicoProfileEmoji;
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import jp.juggler.subwaytooter.table.HighlightWord;
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@SuppressWarnings("WeakerAccess")
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public class EmojiDecoder {
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private static class DecodeEnv {
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@NonNull final Context context;
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@NonNull final SpannableStringBuilder sb = new SpannableStringBuilder();
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@NonNull final DecodeOptions options;
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int normal_char_start = -1;
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DecodeEnv( @NonNull Context context ,@NonNull final DecodeOptions options){
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this.context = context;
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this.options = options;
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}
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void closeNormalText(){
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if( normal_char_start != -1 ){
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int end = sb.length();
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applyHighlight(normal_char_start,end);
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normal_char_start = -1;
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}
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}
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private void applyHighlight( int start , int end ){
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if( options.highlight_trie != null ){
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ArrayList<WordTrieTree.Match > list = options.highlight_trie.matchList( sb,start,end );
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if( list != null ){
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for( WordTrieTree.Match range : list ){
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HighlightWord word = HighlightWord.load( range.word );
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if( word !=null ){
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sb.setSpan( new HighlightSpan( word.color_fg,word.color_bg ), range.start, range.end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE );
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if( word.sound_type != HighlightWord.SOUND_TYPE_NONE ){
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options.highlight_sound = word;
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}
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}
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}
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}
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}
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}
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void addUnicodeString( String s ){
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int i = 0;
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int end = s.length();
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while( i < end ){
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int remain = end - i;
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String emoji = null;
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Integer image_id = null;
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for( int j = EmojiMap201709.utf16_max_length ; j > 0 ; -- j ){
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if( j > remain ) continue;
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String check = s.substring( i, i + j );
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image_id = EmojiMap201709.sUTF16ToImageId.get( check );
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if( image_id != null ){
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if( j < remain && s.charAt( i + j ) == 0xFE0E ){
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// 絵文字バリエーション・シーケンス（EVS）のU+FE0E（VS-15）が直後にある場合
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// その文字を絵文字化しない
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emoji = s.substring( i, i + j + 1 );
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image_id = 0;
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}else{
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emoji = check;
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}
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break;
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}
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}
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if( image_id != null ){
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if( image_id == 0 ){
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// 絵文字バリエーション・シーケンス（EVS）のU+FE0E（VS-15）が直後にある場合
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// その文字を絵文字化しない
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if( normal_char_start == - 1 ){
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normal_char_start = sb.length();
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}
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sb.append( emoji );
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}else{
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addImageSpan( emoji, image_id );
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}
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i += emoji.length();
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continue;
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}
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if( normal_char_start == - 1 ){
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normal_char_start = sb.length();
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}
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int length = Character.charCount( s.codePointAt( i ) );
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if( length == 1 ){
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sb.append( s.charAt( i ) );
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++ i;
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}else{
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sb.append( s.substring( i, i + length ) );
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i += length;
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}
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}
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}
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void addImageSpan( String text, @DrawableRes int res_id ){
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closeNormalText();
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int start = sb.length();
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sb.append( text );
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int end = sb.length();
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sb.setSpan( new EmojiImageSpan( context, res_id ), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE );
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}
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void addNetworkEmojiSpan( String text, @NonNull String url ){
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closeNormalText();
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int start = sb.length();
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sb.append( text );
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int end = sb.length();
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sb.setSpan( new NetworkEmojiSpan( url ), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE );
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}
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}
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public static boolean isShortCodeCharacter( int cp ){
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return ( 'A' <= cp && cp <= 'Z' )
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|| ( 'a' <= cp && cp <= 'z' )
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|| ( '0' <= cp && cp <= '9' )
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|| cp == '-'
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|| cp == '+'
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|| cp == '_'
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|| cp == '@'
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;
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}
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interface ShortCodeSplitterCallback {
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void onString( @NonNull String part );
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void onShortCode( @NonNull String part, @NonNull String name );
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}
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static void splitShortCode(
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@NonNull String s
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, @SuppressWarnings("SameParameterValue") int start
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, int end
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, @NonNull ShortCodeSplitterCallback callback
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){
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int i = start;
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while( i < end ){
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// 絵文字パターンの開始位置を探索する
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start = i;
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while( i < end ){
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int c = s.codePointAt( i );
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int width = Character.charCount( c );
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if( c == ':' ){
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if( App1.allow_non_space_before_emoji_shortcode ){
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// アプリ設定により、: の手前に空白を要求しない
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break;
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}else if( i + width < end && s.codePointAt( i + width ) == '@' ){
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// フレニコのプロフ絵文字 :@who: は手前の空白を要求しない
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break;
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}else if( i == 0 || CharacterGroup.isWhitespace( s.codePointBefore( i ) ) ){
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// ショートコードの手前は始端か改行か空白文字でないとならない
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// 空白文字の判定はサーバサイドのそれにあわせる
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break;
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}
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// shortcodeの開始とみなせないケースだった
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}
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i += width;
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}
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if( i > start ){
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callback.onString( s.substring( start, i ) );
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}
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if( i >= end ) break;
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start = i++; // start=コロンの位置 i=その次の位置
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int emoji_end = - 1;
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while( i < end ){
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int c = s.codePointAt( i );
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if( c == ':' ){
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emoji_end = i;
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break;
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}
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if( ! isShortCodeCharacter( c ) ){
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break;
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}
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i += Character.charCount( c );
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}
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// 絵文字がみつからなかったら、startの位置のコロンだけを処理して残りは次のループで処理する
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if( emoji_end == - 1 || emoji_end - start < 3 ){
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callback.onString( ":" );
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i = start + 1;
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continue;
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}
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callback.onShortCode(
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s.substring( start, emoji_end + 1 ) // ":shortcode:"
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, s.substring( start + 1, emoji_end ) // "shortcode"
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);
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i = emoji_end + 1;// コロンの次の位置
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}
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}
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private static final Pattern reNicoru = Pattern.compile( "\\Anicoru\\d*\\z", Pattern.CASE_INSENSITIVE );
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private static final Pattern reHohoemi = Pattern.compile( "\\Ahohoemi\\d*\\z", Pattern.CASE_INSENSITIVE );
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public static Spannable decodeEmoji(
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@NonNull final Context context
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, @NonNull final String s
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, @NonNull DecodeOptions options
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){
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final DecodeEnv decode_env = new DecodeEnv( context ,options);
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final CustomEmoji.Map custom_map = options.customEmojiMap;
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final NicoProfileEmoji.Map profile_emojis = options.profile_emojis;
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splitShortCode( s, 0, s.length(), new ShortCodeSplitterCallback() {
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@Override public void onString( @NonNull String part ){
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decode_env.addUnicodeString( part );
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}
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@Override public void onShortCode( @NonNull String part, @NonNull String name ){
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EmojiMap201709.EmojiInfo info = EmojiMap201709.sShortNameToImageId.get( name.toLowerCase().replace( '-', '_' ) );
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if( info != null ){
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decode_env.addImageSpan( part, info.image_id );
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return;
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}
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// part=":@name:" name="@name"
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if( name.length() >= 2 && name.charAt( 0 ) == '@' ){
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if( profile_emojis != null ){
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NicoProfileEmoji emoji = profile_emojis.get( name );
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if( emoji == null ) emoji = profile_emojis.get( name.substring( 1 ) );
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if( emoji != null ){
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decode_env.addNetworkEmojiSpan( part, emoji.url );
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}
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}
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return;
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}
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{
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CustomEmoji emoji = ( custom_map == null ? null : custom_map.get( name ) );
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if( emoji != null ){
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String url = ( App1.disable_emoji_animation && ! TextUtils.isEmpty( emoji.static_url ) ) ? emoji.static_url : emoji.url;
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decode_env.addNetworkEmojiSpan( part, url );
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return;
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}
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}
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if( reHohoemi.matcher( name ).find() ){
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decode_env.addImageSpan( part, R.drawable.emoji_hohoemi );
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}else if( reNicoru.matcher( name ).find() ){
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decode_env.addImageSpan( part, R.drawable.emoji_nicoru );
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}else{
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decode_env.addUnicodeString( part );
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}
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}
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} );
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decode_env.closeNormalText();
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return decode_env.sb;
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}
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// 投稿などの際、表示は不要だがショートコード=>Unicodeの解決を行いたい場合がある
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// カスタム絵文字の変換も行わない
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public static String decodeShortCode( @NonNull final String s ){
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final StringBuilder sb = new StringBuilder();
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splitShortCode( s, 0, s.length(), new ShortCodeSplitterCallback() {
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@Override public void onString( @NonNull String part ){
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sb.append( part );
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}
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@Override public void onShortCode( @NonNull String part, @NonNull String name ){
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EmojiMap201709.EmojiInfo info = EmojiMap201709.sShortNameToImageId.get( name.toLowerCase().replace( '-', '_' ) );
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sb.append( info != null ? info.unified : part );
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}
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} );
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return sb.toString();
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}
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// 入力補完用。絵文字ショートコード一覧を部分一致で絞り込む
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static ArrayList< CharSequence > searchShortCode( Context context, String prefix, int limit ){
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ArrayList< CharSequence > dst = new ArrayList<>();
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for( String shortCode : EmojiMap201709.sShortNameList ){
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if( dst.size() >= limit ) break;
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if( ! shortCode.contains( prefix ) ) continue;
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EmojiMap201709.EmojiInfo info = EmojiMap201709.sShortNameToImageId.get( shortCode );
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if( info == null ) continue;
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SpannableStringBuilder sb = new SpannableStringBuilder();
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sb.append( ' ' );
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int start = 0;
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int end = sb.length();
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sb.setSpan( new EmojiImageSpan( context, info.image_id ), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE );
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sb.append( ' ' );
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sb.append( ':' );
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sb.append( shortCode );
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sb.append( ':' );
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dst.add( sb );
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}
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return dst;
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}
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}
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