Documentation
¶
Overview ¶
Package css contains tools for parsing a CSS3 stylesheet.
Index ¶
Constants ¶
const ( // ErrorToken means an error occurred during tokenization. ErrorToken = iota // EOFToken marks the end of the input. EOFToken // IdentToken is an identity token IdentToken // FunctionToken is a function token FunctionToken // AtKeywordToken is an @ keyword AtKeywordToken // HashToken is a hash HashToken // StringToken is a quoted string StringToken // BadStringToken is a badly parsed quoted string BadStringToken // URLToken is a URL URLToken // BadURLToken denotes a badly formed URL BadURLToken // DelimToken is a single code point DelimToken // NumberToken is a number NumberToken // PercentageToken is a percentage PercentageToken // DimensionToken stores a number with a dimension DimensionToken // UnicodeRangeToken sets a range of hex numbers UnicodeRangeToken // IncludeMatchToken is ~= IncludeMatchToken // DashMatchToken is |= DashMatchToken // PrefixMatchToken is ^= PrefixMatchToken // SuffixMatchToken is $= SuffixMatchToken // SubstringMatchToken is *= SubstringMatchToken // ColumnToken : U+007C VERTICAL LINE (|) ColumnToken // WhitespaceToken : a U+000A LINE FEED (\n), U+0009 CHARACTER TABULATION (\t), or U+0020 SPACE ( ). WhitespaceToken // CDOToken : <!-- CDOToken // CDCToken : --> CDCToken // ColonToken : U+003A COLON (:) ColonToken // SemicolonToken : U+003B SEMICOLON (;) SemicolonToken // CommaToken : U+002C COMMA (,) CommaToken // OpenSquareToken : U+005B LEFT SQUARE BRACKET ([) OpenSquareToken // CloseSquareToken : U+005D RIGHT SQUARE BRACKET (]) CloseSquareToken // OpenParenToken : U+0028 LEFT PARENTHESIS (() OpenParenToken // CloseParenToken : U+0029 RIGHT PARENTHESIS ()) CloseParenToken // OpenCurlyToken : U+007B LEFT CURLY BRACKET ({) OpenCurlyToken // CloseCurlyToken : U+007D RIGHT CURLY BRACKET (}) CloseCurlyToken )
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type SegmentType ¶
type SegmentType uint32
A SegmentType is the type of a Segment.
const ( // ByteType is everything not of the other types below. ByteType SegmentType = iota // ImageURLType is a URL for an image. Note that the value has been // stripped of the surrounding 'url' identity token. To reconstruct a stylesheet, // this value must be enclosed into a url token or function token with name 'url'. ImageURLType // FontURLType is similar to an image URL, but for fonts. FontURLType )
type Segments ¶
type Segments []Segment
Segments is a slice of individual Segment structs.
func ParseURLs ¶
ParseURLs chops a style sheet into Segments. Each segment is either a UTF8 encoded byte string, or an image or font URL. This is used to modify the URLs to point at a CDN. Note that when combining the segments back to a stylesheet, the client code must emit url() around URLs. This is done so that client code can choose the quote character as in url("http://foo.com") or url('http://foo.com/') or even leave out the quote character as in url(http://foo.com/). Note that CSS supports escaping quote characters within a string by prefixing with a backslash, so " inside a URL may be written as \".
type Token ¶
type Token struct {
Type TokenType
Value string
Extra string
// contains filtered or unexported fields
}
A Token consists of a TokenType, Value, and optional contextual data. startPos, endPos are the indices in the input CSS being parsed, that this token corresponds to, e.g. Tokenizer.input[startPos:endPos].
func (*Token) String ¶
String returns the raw string representation for the token. The original input may not be preserved, due to preprocessing.
This differs from the token's value. For example, the input of "@font-face" is tokenized as an AtKeywordToken, with a value of "font-face" (without the @ sign). However, its String() will be "@font-face".
type Tokenizer ¶
type Tokenizer struct {
// contains filtered or unexported fields
}
Tokenizer returns a stream of CSS Tokens.
func NewTokenizer ¶
NewTokenizer returns a new CSS Tokenizer for the string, which is assumed to be UTF-8 encoded.
Source Files