001package Torello.CSS; 002 003import java.util.Vector; 004 005/** 006 * CSS-Tokenizer Class for the <B>Comment-Delimiter Open</B> Token. 007 */ 008@Torello.JavaDoc.JDHeaderBackgroundImg(EmbedTagFileID="CSS_TOK") 009public class CDO extends CSSToken 010 implements CharSequence, java.io.Serializable, Comparable<CharSequence> 011{ 012 /** <EMBED CLASS='external-html' DATA-FILE-ID=SVUID> */ 013 protected static final long serialVersionUID = 1; 014 015 016 // ******************************************************************************************** 017 // ******************************************************************************************** 018 // Private Constructor, API "is" and "if" Methods 019 // ******************************************************************************************** 020 // ******************************************************************************************** 021 022 023 static final CDO SINGLETON = new CDO(); 024 025 private CDO() { super("<!--"); } 026 027 @Override 028 public final boolean isCDO() { return true; } 029 030 @Override 031 public final CDO ifCDO() { return this; } 032 033 034 // ******************************************************************************************** 035 // ******************************************************************************************** 036 // Tokenizer's "is" Method(s) 037 // ******************************************************************************************** 038 // ******************************************************************************************** 039 040 041 /** 042 * Checks whether or not the next four code-point / characters are {@code '<', '!', '-'} and 043 * {@code '-'} 044 * 045 * <EMBED CLASS=defs DATA-TOK="Comment-Delimiter Open" DATA-URL=CDO-token-diagram 046 * DATA-OP=Consume> 047 * <EMBED CLASS=external-html DATA-FILE-ID=COPIED_CSS_WG_RR> 048 * <EMBED CLASS=external-html DATA-FILE-ID=CDO_TOK_SVG> 049 * @param css CSS-{@code String} as an array of code-points. 050 * @param sPos The array-index where the tokenizer is to consume its next token 051 * @return {@code TRUE} if and only if the next token in the array is a CDO 052 */ 053 public static boolean is(int[] css, int sPos) 054 { 055 final int c1 = ((sPos + 0) < css.length) ? css[sPos + 0] : 0; 056 final int c2 = ((sPos + 1) < css.length) ? css[sPos + 1] : 0; 057 final int c3 = ((sPos + 2) < css.length) ? css[sPos + 2] : 0; 058 final int c4 = ((sPos + 3) < css.length) ? css[sPos + 3] : 0; 059 060 return (c1 == '<') && (c2 == '!') && (c3 == '-') && (c4 == '-'); 061 } 062}