Class CssReader

java.lang.Object

org.idpf.epubcheck.util.css.CssReader

final class CssReader
extends Object

A wrapper around java.io.Reader with a pushback buffer, offset and line+column tracking. This is used by CssScanner.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) final class	CssReader.Mark

Field Summary

Fields

Modifier and Type	Field	Description
private final int[]	buf
(package private) int	col	The current column in the resource being read
(package private) int	curChar	The char that this reader is currently positioned at, or -1 if EOF is reached.
(package private) static final int	DEFAULT_PUSHBACK_BUFFER_SIZE
private final Reader	in
(package private) int	line	The current line in the resource being read
(package private) int	offset	The offset (in characters) of prevChar from the start of the resource being read.
private int	pos
(package private) int	prevChar	The previous char, or 0 if curChar is the first character in the resource being read.
private int	prevLine
(package private) final String	systemID	The systemID of the resource being read.

Constructor Summary

Constructors

Constructor	Description
CssReader(Reader reader, String systemID, int pushbackSize)

Method Summary

Modifier and Type	Method	Description
(package private) int	at(int n)	Peek and return the character at position n from current position, or -1 if EOF is reached before or at that position.
(package private) int[]	collect(int n)	Reads forward and returns the the next n characters in the stream.
(package private) CssReader	forward(int n)	Read forward n characters, or until the next character is EOF.
(package private) CssReader	forward(com.google.common.base.CharMatcher matcher)	Read forward until the next non-escaped character matches the given CharMatcher or is EOF.
(package private) CssReader.Mark	mark()
(package private) int	next()	Returns the next character in the stream and advances the readers position.
(package private) int	peek()	Returns the next character in the stream without advancing the readers position.
(package private) int[]	peek(int n)	Returns the the next n characters in the stream without advancing the readers position.
private CssReader	reset(CssReader.Mark mark)
String	toString()
(package private) void	unread(int[] cbuf, int off, int len, CssReader.Mark mark)
(package private) void	unread(int[] cbuf, CssReader.Mark mark)
(package private) void	unread(int ch, CssReader.Mark mark)
(package private) void	unread(List<Integer> cbuf, CssReader.Mark mark)

Methods inherited from class Object

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

Field Details

DEFAULT_PUSHBACK_BUFFER_SIZE

static final int DEFAULT_PUSHBACK_BUFFER_SIZE

See Also:

• Constant Field Values

buf

private final int[] buf

pos

private int pos

in

private final Reader in

prevLine

private int prevLine

systemID

final String systemID

The systemID of the resource being read. If the resource being read is virtual the value is set to CssLocaton.NO_SID

curChar

int curChar

The char that this reader is currently positioned at, or -1 if EOF is reached.

prevChar

int prevChar

The previous char, or 0 if curChar is the first character in the resource being read.

offset

int offset

The offset (in characters) of prevChar from the start of the resource being read.

line

int line

The current line in the resource being read

col

int col

The current column in the resource being read

Constructor Details

CssReader

CssReader(Reader reader,
 String systemID,
 int pushbackSize)

Method Details

next

int next()
  throws IOException

Returns the next character in the stream and advances the readers position. If there are no more characters, -1 is returned the first time this method is invoked in that state; multiple invocations at EOF will yield an IllegalStateException.

Throws:

IOException

peek

int peek()
  throws IOException

Returns the next character in the stream without advancing the readers position. If there are no more characters, -1 is returned.

Throws:

IOException

peek

int[] peek(int n)
    throws IOException

Returns the the next n characters in the stream without advancing the readers position.

Parameters:

n - the number of characters to read

Returns:

An array with guaranteed length n, with -1 being the value for all elements at and after EOF.

Throws:

IOException

at

int at(int n)
throws IOException

Peek and return the character at position n from current position, or -1 if EOF is reached before or at that position.

Throws:

IOException

collect

int[] collect(int n)
       throws IOException

Reads forward and returns the the next n characters in the stream. Escapes are returned verbatim. At return, the reader is at positioned such that next() will return n+1 or EOF (-1).

Parameters:

n - the number of characters to read

Returns:

An array with guaranteed length n, with -1 being the value for all elements at and after EOF.

Throws:

IOException

forward

CssReader forward(com.google.common.base.CharMatcher matcher)
           throws IOException

Read forward until the next non-escaped character matches the given CharMatcher or is EOF.

Throws:

IOException

forward

CssReader forward(int n)
           throws IOException

Read forward n characters, or until the next character is EOF.

Throws:

IOException

unread

void unread(int ch,
 CssReader.Mark mark)

unread

void unread(int[] cbuf,
 CssReader.Mark mark)
     throws IOException

Throws:

IOException

unread

void unread(List<Integer> cbuf,
 CssReader.Mark mark)
     throws IOException

Throws:

IOException

unread

void unread(int[] cbuf,
 int off,
 int len,
 CssReader.Mark mark)

mark

CssReader.Mark mark()

reset

private CssReader reset(CssReader.Mark mark)

toString

public String toString()

Overrides:

toString in class Object