Class CssScanner

java.lang.Object
org.idpf.epubcheck.util.css.CssScanner
final class CssScanner extends Object
A lexical scanner for CSS.

Lexical errors are stored as attributes on the tokens in which they occurred. The supplied CssErrorHandler is also invoked when a lexical error occurs, so that clients can terminate the scanning by a rethrow.

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    (package private) static class 
    CssScanner.CssEscapeMemoizer
    Memoizer for escapes at forward reader positions.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private static final com.google.common.base.CharMatcher
    A
     
    private static final int[]
    AND_LL
    The three last characters in the AND token
    private CssToken.TokenBuilder
    builder
     
    private static final int[]
    CDC_LL
    The two last characters in the CDC token
    private static final int[]
    CDO_LL
    The three last characters in the CDO token
    private final CssToken.CssTokenConsumer
    consumer
     
    private char
    cur
     
    private final boolean
    debug
     
    private final CssErrorHandler
    errHandler
     
    private final CssScanner.CssEscapeMemoizer
    escapes
     
    (package private) static final com.google.common.base.CharMatcher
    HEXCHAR
     
    private Locale
    locale
     
    private static final com.google.common.base.CharMatcher
    N
     
    private static final com.google.common.base.CharMatcher
    NMCHAR
    {nmchar} excluding {escape}
    private static final com.google.common.base.CharMatcher
    NMSTART
    {nmstart} excluding {escape}
    private static final int[]
    NOT_LL
    The three last characters in the NOT token
    private static final com.google.common.base.CharMatcher
    NOT_WHITESPACE
     
    private static final com.google.common.base.CharMatcher
    NUM
    {num}
    private static final com.google.common.base.CharMatcher
    NUMEND
    {num} end char cannot be period
    private static final com.google.common.base.CharMatcher
    NUMSTART
    {num} start char can be unary operators
    private static final com.google.common.base.CharMatcher
    O
     
    private static final int[]
    ONLY_LL
    The three last characters in the ONLY token
    private static final int
    QNT_TOKEN_MAXLENGTH
     
    private static final com.google.common.base.CharMatcher
    QNTSTART
    start of quantities that followed after {num} excluding {escape}
    private static final Map<int[], CssToken.Type>
    quantities
     
    (package private) static final com.google.common.base.CharMatcher
    QUOTES
     
    private final CssReader
    reader
     
    (package private) static final com.google.common.base.CharMatcher
    TERMINATOR
     
    private static final com.google.common.base.CharMatcher
    U
     
    private static final com.google.common.base.CharMatcher
    UNARY
     
    private static final com.google.common.base.CharMatcher
    URANGECHAR
     
    private static final com.google.common.base.CharMatcher
    URANGESTART
     
    private static final int[]
    URI_LL
    The three last characters in the URI start token
    (package private) static final com.google.common.base.CharMatcher
    WHITESPACE
     

  • Constructor Summary

    Constructors
    Modifier
    Constructor
    Description
    private
    CssScanner(Reader in, String systemID, CssErrorHandler errHandler, CssToken.CssTokenConsumer consumer, int pushbackBufferSize, Locale locale)
     
    (package private)
    CssScanner(Reader in, String systemID, CssErrorHandler errHandler, CssToken.CssTokenConsumer consumer, Locale locale)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    private void
    _and()
     
    private void
    _atkeyword()
    ATKEYWORD '@'[-]?{nmstart}{nmchar}* nmstart [_a-z]|{nonascii}|{escape} nmchar [_a-z0-9-]|{nonascii}|{escape}
    private void
    _cdc()
     
    private void
    _cdo()
     
    private void
    _classname()
    CLASSNAME "."{name} This is not part of formal lexical constructs, but seems to be safe to do at scanner level.
    private void
    _comment()
    Builds a comment token, excluding the leading and trailing comment tokens.
    private void
    _dashmatch()
    DASHMATCH |=
    private void
    _function()
    FUNCTION {ident}\(
    private void
    _hashname()
    HASHNAME "#"{name} name {nmchar}+ [_a-z0-9-]|{nonascii}|{escape}
    private void
    _ident()
    IDENT ([-]?{nmstart}|[--]){nmchar}*
    private void
    _important()
    IMPORTANT !{w}important
    private void
    _includes()
    INCLUDES ~=
    private void
    _not()
     
    private void
    _num()
     
    private void
    _only()
     
    private void
    _prefixmatch()
    PREFIXMATCH ^=
    private void
    _quantity()
    With incoming builder containing a valid NUMBER, and next char being a valid QNTSTART, modify the type and append to the builder
    private void
    _string()
    string1 \"([^\n\r\f\\"]|\\{nl}|{escape})*\" string2 \'([^\n\r\f\\']|\\{nl}|{escape})*\'
    private void
    _substringmatch()
    SUBSTRINGMATCH *=
    private void
    _suffixmatch()
    SUFFIXMATCH $=
    private void
    _urange()
    Builds a UNICODE_RANGE token.
    private void
    _uri()
    URI url\({w}{string}{w}\) | url\({w}([!#$%invalid input: '&'*-\[\]-~]|{nonascii}|{escape})*{w}\)
    private void
    _ws()
    Whitespace w ::= wc wc ::= #x9 | #xA | #xC | #xD | #x20
    private void
    append(com.google.common.base.CharMatcher matcher)
    Parse forward and append to the TokenBuilder field all characters that match matcher, or until the next character is EOF.
    private void
    append(com.google.common.base.CharMatcher matcher, CssToken.TokenBuilder builder)
    Parse forward and append to the supplied builder all characters that match matcher, or until the next character is EOF.
    private static boolean
    equals(int[] a, int[] b)
    Like Arrays.equals, but does not return true when both are null.
    private static boolean
    equals(int[] a, int[] b, boolean ignoreAsciiCase)
    Like Arrays.equals, but does not return true when both are null.
    private boolean
    forwardMatch(String match, boolean ignoreCase, boolean resetOnTrue)
    Check if a forward scan will equal given match string
    (package private) static int
    isNewLine(int[] chars)
    Determine whether a sequence of chars begin with a CSS newline.
    private boolean
    isNextEscape()
    Returns true if reader next() is the start of a valid escape sequence.
    private static boolean
    matches(int ch, com.google.common.base.CharMatcher matcher)
    Return true if ch matches matcher, false if not or if ch represents EOF (-1).
    private static boolean
    matchesOrEOF(int ch, com.google.common.base.CharMatcher matcher)
    Return true if ch represents EOF (-1), or if it matches matcher.
    (package private) void
    scan()
     
    private String
    toString(List<Integer> ints)
     

    Methods inherited from class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • reader

      private final CssReader reader

    • consumer

      private final CssToken.CssTokenConsumer consumer

    • escapes

      private final CssScanner.CssEscapeMemoizer escapes

    • builder

      private CssToken.TokenBuilder builder

    • errHandler

      private final CssErrorHandler errHandler

    • debug

      private final boolean debug
      See Also:

    • cur

      private char cur

    • locale

      private Locale locale

    • QNT_TOKEN_MAXLENGTH

      private static final int QNT_TOKEN_MAXLENGTH
      See Also:

    • quantities

      private static final Map<int[], CssToken.Type> quantities

    • WHITESPACE

      static final com.google.common.base.CharMatcher WHITESPACE

    • NOT_WHITESPACE

      private static final com.google.common.base.CharMatcher NOT_WHITESPACE

    • QUOTES

      static final com.google.common.base.CharMatcher QUOTES

    • U

      private static final com.google.common.base.CharMatcher U

    • O

      private static final com.google.common.base.CharMatcher O

    • N

      private static final com.google.common.base.CharMatcher N

    • A

      private static final com.google.common.base.CharMatcher A

    • NMSTART

      private static final com.google.common.base.CharMatcher NMSTART
      {nmstart} excluding {escape}

    • NMCHAR

      private static final com.google.common.base.CharMatcher NMCHAR
      {nmchar} excluding {escape}

    • QNTSTART

      private static final com.google.common.base.CharMatcher QNTSTART
      start of quantities that followed after {num} excluding {escape}

    • NUMEND

      private static final com.google.common.base.CharMatcher NUMEND
      {num} end char cannot be period

    • NUM

      private static final com.google.common.base.CharMatcher NUM
      {num}

    • UNARY

      private static final com.google.common.base.CharMatcher UNARY

    • NUMSTART

      private static final com.google.common.base.CharMatcher NUMSTART
      {num} start char can be unary operators

    • HEXCHAR

      static final com.google.common.base.CharMatcher HEXCHAR

    • URANGESTART

      private static final com.google.common.base.CharMatcher URANGESTART

    • URANGECHAR

      private static final com.google.common.base.CharMatcher URANGECHAR

    • TERMINATOR

      static final com.google.common.base.CharMatcher TERMINATOR

    • CDO_LL

      private static final int[] CDO_LL
      The three last characters in the CDO token

    • CDC_LL

      private static final int[] CDC_LL
      The two last characters in the CDC token

    • URI_LL

      private static final int[] URI_LL
      The three last characters in the URI start token

    • ONLY_LL

      private static final int[] ONLY_LL
      The three last characters in the ONLY token

    • NOT_LL

      private static final int[] NOT_LL
      The three last characters in the NOT token

    • AND_LL

      private static final int[] AND_LL
      The three last characters in the AND token

  • Constructor Details

  • Method Details