A CSS parser. This works by way of a delegate that implements the CSSParserCallback interface. The delegate is notified of the following events:

Import statement: handleImport.
Selectors handleSelector. This is invoked for each string. For example if the Reader contained p, bar , a {}, the delegate would be notified 4 times, for 'p,' 'bar' ',' and 'a'.
When a rule starts, startRule.
Properties in the rule via the handleProperty. This is invoked once per property/value key, for example font size: foo;, would cause the delegate to be notified once with a value of 'font size'.
Values in the rule via the handleValue, this is notified for the total value.
When a rule ends, endRule.

This will parse much more than CSS 1, and loosely implements the recommendation for Forward-compatible parsing in section 7.1 of the CSS spec found at: http://www.w3.org/TR/REC-CSS1.

If parsing results in an error, a RuntimeException will be thrown.

This will preserve case. If the callback wishes to treat certain portions case-insensitively (such as selectors), it should use toLowerCase, or something similar.

Nested and Inner Type Summary

Modifier and Type	Class and Description
pack-priv static interface	CSSParser.CSSParserCallback

Field Summary

Modifier and Type	Field and Description
private static final int	BRACE_CLOSE
private static final int	BRACE_OPEN
private static final int	BRACKET_CLOSE
private static final int	BRACKET_OPEN
private CSSParser.CSSParserCallback	callback Notified of state.
private static final char[]	charMapping
private boolean	didPushChar Set to true if one character has been read ahead.
private boolean	encounteredRuleSet Set to true when the first non @ rule is encountered.
private static final int	END
private static final int	IDENTIFIER
private static final int	PAREN_CLOSE
private static final int	PAREN_OPEN
private int	pushedChar The read ahead character.
private Reader	reader Holds the incoming CSS rules.
private boolean	readWS Set to true if any whitespace is read.
private int	stackCount Number of valid blocks.
private char[]	tokenBuffer nextToken() inserts the string here.
private int	tokenBufferLength Current number of chars in tokenBufferLength.
private StringBuffer	unitBuffer Temporary place to hold identifiers.
private int[]	unitStack Used to indicate blocks.

Constructor Summary

Access	Constructor and Description
pack-priv	CSSParser()

Method Summary

Modifier and Type	Method and Description
private void	append(char character)
private void	endBlock(int endToken) Called when an end block is encountered )]}
private boolean	getIdentifier(char stopChar) Gets an identifier, returning `true` if the length of the string is greater than 0, stopping when `stopChar`, whitespace, or one of {}()[] is hit.
private boolean	getNextStatement() Gets the next statement, returning false if the end is reached.
private boolean	inBlock() Returns: true if currently in a block.
private int	nextToken(char idChar) Fetches the next token.
pack-priv void	parse(Reader reader, CSSParser.CSSParserCallback callback, boolean inRule)
private void	parseAtRule() Parses an @ rule, stopping at a matching brace pair, or ;.
private int	parseDeclaration() Parses a single declaration, which is an identifier a : and another identifier.
private void	parseDeclarationBlock() Parses a declaration block.
private int	parseIdentifiers(char extraChar, boolean wantsBlocks) Parses identifiers until `extraChar` is encountered, returning the ending token, which will be `IDENTIFIER` if `extraChar` is found.
private void	parseRuleSet() Parses the next rule set, which is a selector followed by a declaration block.
private boolean	parseSelectors() Parses a set of selectors, returning false if the end of the stream is reached.
private void	parseTillClosed(int openToken) Parses till a matching block close is encountered.
private void	pushChar(int tempChar) Supports one character look ahead, this will throw if called twice in a row.
private int	readChar() Reads a character from the stream.
private void	readComment() Parses a comment block.
private void	readTill(char stopChar) Reads till a `stopChar` is encountered, escaping characters as necessary.
private int	readWS() Skips any white space, returning the character after the white space.
private void	startBlock(int startToken) Called when a block start is encountered ({[.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

BRACE_CLOSE	back to summary
private static final int BRACE_CLOSE

BRACE_OPEN	back to summary
private static final int BRACE_OPEN

BRACKET_CLOSE	back to summary
private static final int BRACKET_CLOSE

BRACKET_OPEN	back to summary
private static final int BRACKET_OPEN

callback	back to summary
private CSSParser.CSSParserCallback callback Notified of state.

charMapping	back to summary
private static final char[] charMapping

didPushChar	back to summary
private boolean didPushChar Set to true if one character has been read ahead.

encounteredRuleSet	back to summary
private boolean encounteredRuleSet Set to true when the first non @ rule is encountered.

END	back to summary
private static final int END

IDENTIFIER	back to summary
private static final int IDENTIFIER

PAREN_CLOSE	back to summary
private static final int PAREN_CLOSE

PAREN_OPEN	back to summary
private static final int PAREN_OPEN

pushedChar	back to summary
private int pushedChar The read ahead character.

reader	back to summary
private Reader reader Holds the incoming CSS rules.

readWS	back to summary
private boolean readWS Set to true if any whitespace is read.

stackCount	back to summary
private int stackCount Number of valid blocks.

tokenBuffer	back to summary
private char[] tokenBuffer nextToken() inserts the string here.

tokenBufferLength	back to summary
private int tokenBufferLength Current number of chars in tokenBufferLength.

unitBuffer	back to summary
private StringBuffer unitBuffer Temporary place to hold identifiers.

unitStack	back to summary
private int[] unitStack Used to indicate blocks.

Constructor Detail

CSSParser	back to summary
pack-priv CSSParser()

Method Detail

append	back to summary
private void append(char character)

endBlock	back to summary
private void endBlock(int endToken) Called when an end block is encountered )]}

getIdentifier	back to summary
private boolean getIdentifier(char stopChar) throws IOException Gets an identifier, returning `true` if the length of the string is greater than 0, stopping when `stopChar`, whitespace, or one of {}()[] is hit.

getNextStatement	back to summary
private boolean getNextStatement() throws IOException Gets the next statement, returning false if the end is reached. A statement is either an @rule, or a ruleset.

inBlock	back to summary
private boolean inBlock() Returns:boolean true if currently in a block.

nextToken	back to summary
private int nextToken(char idChar) throws IOException Fetches the next token.

parse	back to summary
pack-priv void parse(Reader reader, CSSParser.CSSParserCallback callback, boolean inRule) throws IOException

parseAtRule	back to summary
private void parseAtRule() throws IOException Parses an @ rule, stopping at a matching brace pair, or ;.

parseDeclaration	back to summary
private int parseDeclaration() throws IOException Parses a single declaration, which is an identifier a : and another identifier. This returns the last token seen.

parseDeclarationBlock	back to summary
private void parseDeclarationBlock() throws IOException Parses a declaration block. Which a number of declarations followed by a })].

parseIdentifiers	back to summary
private int parseIdentifiers(char extraChar, boolean wantsBlocks) throws IOException Parses identifiers until `extraChar` is encountered, returning the ending token, which will be `IDENTIFIER` if `extraChar` is found.

parseRuleSet	back to summary
private void parseRuleSet() throws IOException Parses the next rule set, which is a selector followed by a declaration block.

parseSelectors	back to summary
private boolean parseSelectors() throws IOException Parses a set of selectors, returning false if the end of the stream is reached.

parseTillClosed	back to summary
private void parseTillClosed(int openToken) throws IOException Parses till a matching block close is encountered. This is only appropriate to be called at the top level (no nesting).

pushChar	back to summary
private void pushChar(int tempChar) Supports one character look ahead, this will throw if called twice in a row.

readChar	back to summary
private int readChar() throws IOException Reads a character from the stream.

readComment	back to summary
private void readComment() throws IOException Parses a comment block.

readTill	back to summary
private void readTill(char stopChar) throws IOException Reads till a `stopChar` is encountered, escaping characters as necessary.

readWS	back to summary
private int readWS() throws IOException Skips any white space, returning the character after the white space.

startBlock	back to summary
private void startBlock(int startToken) Called when a block start is encountered ({[.

javax.swing.text.html back to summary

pack-priv Interface CSSParser.CSSParserCallback

Known Direct Implementers: javax.swing.text.html.StyleSheet.CssParser

Method Summary

Modifier and Type	Method and Description
public void	endRule()
public void	handleImport(String importString) Called when an `@import` is encountered.
public void	handleProperty(String property)
public void	handleSelector(String selector)
public void	handleValue(String value)
public void	startRule()

Method Detail

endRule	back to summary
public void endRule()

handleImport	back to summary
public void handleImport(String importString) Called when an `@import` is encountered.

handleProperty	back to summary
public void handleProperty(String property)

handleSelector	back to summary
public void handleSelector(String selector)

handleValue	back to summary
public void handleValue(String value)

startRule	back to summary
public void startRule()

pack-priv Class CSSParser

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

pack-priv Interface CSSParser.CSSParserCallback

Method Summary

Method Detail