mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-23 12:16:38 +00:00
f0c3533862
Bumps [github.com/tdewolff/minify/v2](https://github.com/tdewolff/minify) from 2.20.9 to 2.20.12. - [Release notes](https://github.com/tdewolff/minify/releases) - [Commits](https://github.com/tdewolff/minify/compare/v2.20.9...v2.20.12) --- updated-dependencies: - dependency-name: github.com/tdewolff/minify/v2 dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
494 lines
13 KiB
Go
494 lines
13 KiB
Go
package css
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"strconv"
|
|
|
|
"github.com/tdewolff/parse/v2"
|
|
"github.com/tdewolff/parse/v2/buffer"
|
|
)
|
|
|
|
var wsBytes = []byte(" ")
|
|
var endBytes = []byte("}")
|
|
var emptyBytes = []byte("")
|
|
|
|
// GrammarType determines the type of grammar.
|
|
type GrammarType uint32
|
|
|
|
// GrammarType values.
|
|
const (
|
|
ErrorGrammar GrammarType = iota // extra token when errors occur
|
|
CommentGrammar
|
|
AtRuleGrammar
|
|
BeginAtRuleGrammar
|
|
EndAtRuleGrammar
|
|
QualifiedRuleGrammar
|
|
BeginRulesetGrammar
|
|
EndRulesetGrammar
|
|
DeclarationGrammar
|
|
TokenGrammar
|
|
CustomPropertyGrammar
|
|
)
|
|
|
|
// String returns the string representation of a GrammarType.
|
|
func (tt GrammarType) String() string {
|
|
switch tt {
|
|
case ErrorGrammar:
|
|
return "Error"
|
|
case CommentGrammar:
|
|
return "Comment"
|
|
case AtRuleGrammar:
|
|
return "AtRule"
|
|
case BeginAtRuleGrammar:
|
|
return "BeginAtRule"
|
|
case EndAtRuleGrammar:
|
|
return "EndAtRule"
|
|
case QualifiedRuleGrammar:
|
|
return "QualifiedRule"
|
|
case BeginRulesetGrammar:
|
|
return "BeginRuleset"
|
|
case EndRulesetGrammar:
|
|
return "EndRuleset"
|
|
case DeclarationGrammar:
|
|
return "Declaration"
|
|
case TokenGrammar:
|
|
return "Token"
|
|
case CustomPropertyGrammar:
|
|
return "CustomProperty"
|
|
}
|
|
return "Invalid(" + strconv.Itoa(int(tt)) + ")"
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////
|
|
|
|
// State is the state function the parser currently is in.
|
|
type State func(*Parser) GrammarType
|
|
|
|
// Token is a single TokenType and its associated data.
|
|
type Token struct {
|
|
TokenType
|
|
Data []byte
|
|
}
|
|
|
|
func (t Token) String() string {
|
|
return t.TokenType.String() + "('" + string(t.Data) + "')"
|
|
}
|
|
|
|
// Parser is the state for the parser.
|
|
type Parser struct {
|
|
l *Lexer
|
|
state []State
|
|
err string
|
|
errPos int
|
|
|
|
buf []Token
|
|
level int
|
|
|
|
data []byte
|
|
tt TokenType
|
|
keepWS bool
|
|
prevWS bool
|
|
prevEnd bool
|
|
prevComment bool
|
|
}
|
|
|
|
// NewParser returns a new CSS parser from an io.Reader. isInline specifies whether this is an inline style attribute.
|
|
func NewParser(r *parse.Input, isInline bool) *Parser {
|
|
l := NewLexer(r)
|
|
p := &Parser{
|
|
l: l,
|
|
state: make([]State, 0, 4),
|
|
}
|
|
|
|
if isInline {
|
|
p.state = append(p.state, (*Parser).parseDeclarationList)
|
|
} else {
|
|
p.state = append(p.state, (*Parser).parseStylesheet)
|
|
}
|
|
return p
|
|
}
|
|
|
|
// HasParseError returns true if there is a parse error (and not a read error).
|
|
func (p *Parser) HasParseError() bool {
|
|
return p.err != ""
|
|
}
|
|
|
|
// Err returns the error encountered during parsing, this is often io.EOF but also other errors can be returned.
|
|
func (p *Parser) Err() error {
|
|
if p.err != "" {
|
|
r := buffer.NewReader(p.l.r.Bytes())
|
|
return parse.NewError(r, p.errPos, p.err)
|
|
}
|
|
return p.l.Err()
|
|
}
|
|
|
|
// Next returns the next Grammar. It returns ErrorGrammar when an error was encountered. Using Err() one can retrieve the error message.
|
|
func (p *Parser) Next() (GrammarType, TokenType, []byte) {
|
|
p.err = ""
|
|
|
|
if p.prevEnd {
|
|
p.tt, p.data = RightBraceToken, endBytes
|
|
p.prevEnd = false
|
|
} else {
|
|
p.tt, p.data = p.popToken(true)
|
|
}
|
|
gt := p.state[len(p.state)-1](p)
|
|
return gt, p.tt, p.data
|
|
}
|
|
|
|
// Offset return offset for current Grammar
|
|
func (p *Parser) Offset() int {
|
|
return p.l.r.Offset()
|
|
}
|
|
|
|
// Values returns a slice of Tokens for the last Grammar. Only AtRuleGrammar, BeginAtRuleGrammar, BeginRulesetGrammar and Declaration will return the at-rule components, ruleset selector and declaration values respectively.
|
|
func (p *Parser) Values() []Token {
|
|
return p.buf
|
|
}
|
|
|
|
func (p *Parser) popToken(allowComment bool) (TokenType, []byte) {
|
|
p.prevWS = false
|
|
p.prevComment = false
|
|
tt, data := p.l.Next()
|
|
for !p.keepWS && tt == WhitespaceToken || tt == CommentToken {
|
|
if tt == WhitespaceToken {
|
|
p.prevWS = true
|
|
} else {
|
|
p.prevComment = true
|
|
if allowComment && len(p.state) == 1 {
|
|
break
|
|
}
|
|
}
|
|
tt, data = p.l.Next()
|
|
}
|
|
return tt, data
|
|
}
|
|
|
|
func (p *Parser) initBuf() {
|
|
p.buf = p.buf[:0]
|
|
}
|
|
|
|
func (p *Parser) pushBuf(tt TokenType, data []byte) {
|
|
p.buf = append(p.buf, Token{tt, data})
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////
|
|
|
|
func (p *Parser) parseStylesheet() GrammarType {
|
|
if p.tt == CDOToken || p.tt == CDCToken {
|
|
return TokenGrammar
|
|
} else if p.tt == AtKeywordToken {
|
|
return p.parseAtRule()
|
|
} else if p.tt == CommentToken {
|
|
return CommentGrammar
|
|
} else if p.tt == ErrorToken {
|
|
return ErrorGrammar
|
|
}
|
|
return p.parseQualifiedRule()
|
|
}
|
|
|
|
func (p *Parser) parseDeclarationList() GrammarType {
|
|
if p.tt == CommentToken {
|
|
p.tt, p.data = p.popToken(false)
|
|
}
|
|
for p.tt == SemicolonToken {
|
|
p.tt, p.data = p.popToken(false)
|
|
}
|
|
|
|
// IE hack: *color:red;
|
|
if p.tt == DelimToken && p.data[0] == '*' {
|
|
tt, data := p.popToken(false)
|
|
p.tt = tt
|
|
p.data = append(p.data, data...)
|
|
}
|
|
|
|
if p.tt == ErrorToken {
|
|
return ErrorGrammar
|
|
} else if p.tt == AtKeywordToken {
|
|
return p.parseAtRule()
|
|
} else if p.tt == IdentToken || p.tt == DelimToken {
|
|
return p.parseDeclaration()
|
|
} else if p.tt == CustomPropertyNameToken {
|
|
return p.parseCustomProperty()
|
|
}
|
|
|
|
// parse error
|
|
p.initBuf()
|
|
p.l.r.Move(-len(p.data))
|
|
p.err, p.errPos = fmt.Sprintf("unexpected token '%s' in declaration", string(p.data)), p.l.r.Offset()
|
|
p.l.r.Move(len(p.data))
|
|
|
|
if p.tt == RightBraceToken {
|
|
// right brace token will occur when we've had a decl error that ended in a right brace token
|
|
// as these are not handled by decl error, we handle it here explicitly. Normally its used to end eg. the qual rule.
|
|
p.pushBuf(p.tt, p.data)
|
|
return ErrorGrammar
|
|
}
|
|
return p.parseDeclarationError(p.tt, p.data)
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////
|
|
|
|
func (p *Parser) parseAtRule() GrammarType {
|
|
p.initBuf()
|
|
p.data = parse.ToLower(parse.Copy(p.data))
|
|
atRuleName := p.data
|
|
if len(atRuleName) > 0 && atRuleName[1] == '-' {
|
|
if i := bytes.IndexByte(atRuleName[2:], '-'); i != -1 {
|
|
atRuleName = atRuleName[i+2:] // skip vendor specific prefix
|
|
}
|
|
}
|
|
atRule := ToHash(atRuleName[1:])
|
|
|
|
first := true
|
|
skipWS := false
|
|
for {
|
|
tt, data := p.popToken(false)
|
|
if tt == LeftBraceToken && p.level == 0 {
|
|
if atRule == Font_Face || atRule == Page {
|
|
p.state = append(p.state, (*Parser).parseAtRuleDeclarationList)
|
|
} else if atRule == Document || atRule == Keyframes || atRule == Media || atRule == Supports {
|
|
p.state = append(p.state, (*Parser).parseAtRuleRuleList)
|
|
} else {
|
|
p.state = append(p.state, (*Parser).parseAtRuleUnknown)
|
|
}
|
|
return BeginAtRuleGrammar
|
|
} else if (tt == SemicolonToken || tt == RightBraceToken) && p.level == 0 || tt == ErrorToken {
|
|
p.prevEnd = (tt == RightBraceToken)
|
|
return AtRuleGrammar
|
|
} else if tt == LeftParenthesisToken || tt == LeftBraceToken || tt == LeftBracketToken || tt == FunctionToken {
|
|
p.level++
|
|
} else if tt == RightParenthesisToken || tt == RightBraceToken || tt == RightBracketToken {
|
|
if p.level == 0 {
|
|
// TODO: buggy
|
|
p.pushBuf(tt, data)
|
|
if 1 < len(p.state) {
|
|
p.state = p.state[:len(p.state)-1]
|
|
}
|
|
p.err, p.errPos = "unexpected ending in at rule", p.l.r.Offset()
|
|
return ErrorGrammar
|
|
}
|
|
p.level--
|
|
}
|
|
if first {
|
|
if tt == LeftParenthesisToken || tt == LeftBracketToken {
|
|
p.prevWS = false
|
|
}
|
|
first = false
|
|
}
|
|
if len(data) == 1 && (data[0] == ',' || data[0] == ':') {
|
|
skipWS = true
|
|
} else if p.prevWS && !skipWS && tt != RightParenthesisToken {
|
|
p.pushBuf(WhitespaceToken, wsBytes)
|
|
} else {
|
|
skipWS = false
|
|
}
|
|
if tt == LeftParenthesisToken {
|
|
skipWS = true
|
|
}
|
|
p.pushBuf(tt, data)
|
|
}
|
|
}
|
|
|
|
func (p *Parser) parseAtRuleRuleList() GrammarType {
|
|
if p.tt == RightBraceToken || p.tt == ErrorToken {
|
|
p.state = p.state[:len(p.state)-1]
|
|
return EndAtRuleGrammar
|
|
} else if p.tt == AtKeywordToken {
|
|
return p.parseAtRule()
|
|
} else {
|
|
return p.parseQualifiedRule()
|
|
}
|
|
}
|
|
|
|
func (p *Parser) parseAtRuleDeclarationList() GrammarType {
|
|
for p.tt == SemicolonToken {
|
|
p.tt, p.data = p.popToken(false)
|
|
}
|
|
if p.tt == RightBraceToken || p.tt == ErrorToken {
|
|
p.state = p.state[:len(p.state)-1]
|
|
return EndAtRuleGrammar
|
|
}
|
|
return p.parseDeclarationList()
|
|
}
|
|
|
|
func (p *Parser) parseAtRuleUnknown() GrammarType {
|
|
p.keepWS = true
|
|
if p.tt == RightBraceToken && p.level == 0 || p.tt == ErrorToken {
|
|
p.state = p.state[:len(p.state)-1]
|
|
p.keepWS = false
|
|
return EndAtRuleGrammar
|
|
}
|
|
if p.tt == LeftParenthesisToken || p.tt == LeftBraceToken || p.tt == LeftBracketToken || p.tt == FunctionToken {
|
|
p.level++
|
|
} else if p.tt == RightParenthesisToken || p.tt == RightBraceToken || p.tt == RightBracketToken {
|
|
p.level--
|
|
}
|
|
return TokenGrammar
|
|
}
|
|
|
|
func (p *Parser) parseQualifiedRule() GrammarType {
|
|
p.initBuf()
|
|
first := true
|
|
inAttrSel := false
|
|
skipWS := true
|
|
var tt TokenType
|
|
var data []byte
|
|
for {
|
|
if first {
|
|
tt, data = p.tt, p.data
|
|
p.tt = WhitespaceToken
|
|
p.data = emptyBytes
|
|
first = false
|
|
} else {
|
|
tt, data = p.popToken(false)
|
|
}
|
|
if tt == LeftBraceToken && p.level == 0 {
|
|
p.state = append(p.state, (*Parser).parseQualifiedRuleDeclarationList)
|
|
return BeginRulesetGrammar
|
|
} else if tt == ErrorToken {
|
|
p.err, p.errPos = "unexpected ending in qualified rule", p.l.r.Offset()
|
|
return ErrorGrammar
|
|
} else if tt == LeftParenthesisToken || tt == LeftBraceToken || tt == LeftBracketToken || tt == FunctionToken {
|
|
p.level++
|
|
} else if tt == RightParenthesisToken || tt == RightBraceToken || tt == RightBracketToken {
|
|
if p.level == 0 {
|
|
// TODO: buggy
|
|
p.pushBuf(tt, data)
|
|
if 1 < len(p.state) {
|
|
p.state = p.state[:len(p.state)-1]
|
|
}
|
|
p.err, p.errPos = "unexpected ending in qualified rule", p.l.r.Offset()
|
|
return ErrorGrammar
|
|
}
|
|
p.level--
|
|
}
|
|
if len(data) == 1 && (data[0] == ',' || data[0] == '>' || data[0] == '+' || data[0] == '~') {
|
|
if data[0] == ',' {
|
|
return QualifiedRuleGrammar
|
|
}
|
|
skipWS = true
|
|
} else if p.prevWS && !skipWS && !inAttrSel {
|
|
p.pushBuf(WhitespaceToken, wsBytes)
|
|
} else {
|
|
skipWS = false
|
|
}
|
|
if tt == LeftBracketToken {
|
|
inAttrSel = true
|
|
} else if tt == RightBracketToken {
|
|
inAttrSel = false
|
|
}
|
|
p.pushBuf(tt, data)
|
|
}
|
|
}
|
|
|
|
func (p *Parser) parseQualifiedRuleDeclarationList() GrammarType {
|
|
for p.tt == SemicolonToken {
|
|
p.tt, p.data = p.popToken(false)
|
|
}
|
|
if p.tt == RightBraceToken || p.tt == ErrorToken {
|
|
p.state = p.state[:len(p.state)-1]
|
|
return EndRulesetGrammar
|
|
}
|
|
return p.parseDeclarationList()
|
|
}
|
|
|
|
func (p *Parser) parseDeclaration() GrammarType {
|
|
p.initBuf()
|
|
p.data = parse.ToLower(parse.Copy(p.data))
|
|
|
|
ttName, dataName := p.tt, p.data
|
|
tt, data := p.popToken(false)
|
|
if tt != ColonToken {
|
|
p.l.r.Move(-len(data))
|
|
p.err, p.errPos = "expected colon in declaration", p.l.r.Offset()
|
|
p.l.r.Move(len(data))
|
|
p.pushBuf(ttName, dataName)
|
|
return p.parseDeclarationError(tt, data)
|
|
}
|
|
|
|
skipWS := true
|
|
for {
|
|
tt, data := p.popToken(false)
|
|
if (tt == SemicolonToken || tt == RightBraceToken) && p.level == 0 || tt == ErrorToken {
|
|
p.prevEnd = (tt == RightBraceToken)
|
|
return DeclarationGrammar
|
|
} else if tt == LeftParenthesisToken || tt == LeftBraceToken || tt == LeftBracketToken || tt == FunctionToken {
|
|
p.level++
|
|
} else if tt == RightParenthesisToken || tt == RightBraceToken || tt == RightBracketToken {
|
|
if p.level == 0 {
|
|
// TODO: buggy
|
|
p.err, p.errPos = "unexpected ending in declaration", p.l.r.Offset()
|
|
p.pushBuf(ttName, dataName)
|
|
p.pushBuf(ColonToken, []byte{':'})
|
|
return p.parseDeclarationError(tt, data)
|
|
}
|
|
p.level--
|
|
}
|
|
if len(data) == 1 && (data[0] == ',' || data[0] == '/' || data[0] == ':' || data[0] == '!' || data[0] == '=') {
|
|
skipWS = true
|
|
} else if (p.prevWS || p.prevComment) && !skipWS {
|
|
p.pushBuf(WhitespaceToken, wsBytes)
|
|
} else {
|
|
skipWS = false
|
|
}
|
|
p.pushBuf(tt, data)
|
|
}
|
|
}
|
|
|
|
func (p *Parser) parseDeclarationError(tt TokenType, data []byte) GrammarType {
|
|
// we're on the offending (tt,data), keep popping tokens till we reach ;, }, or EOF
|
|
p.tt, p.data = tt, data
|
|
for {
|
|
if (tt == SemicolonToken || tt == RightBraceToken) && p.level == 0 || tt == ErrorToken {
|
|
p.prevEnd = (tt == RightBraceToken)
|
|
if tt == SemicolonToken {
|
|
p.pushBuf(tt, data)
|
|
}
|
|
return ErrorGrammar
|
|
} else if tt == LeftParenthesisToken || tt == LeftBraceToken || tt == LeftBracketToken || tt == FunctionToken {
|
|
p.level++
|
|
} else if tt == RightParenthesisToken || tt == RightBraceToken || tt == RightBracketToken {
|
|
p.level--
|
|
}
|
|
|
|
if p.prevWS {
|
|
p.pushBuf(WhitespaceToken, wsBytes)
|
|
}
|
|
p.pushBuf(tt, data)
|
|
|
|
tt, data = p.popToken(false)
|
|
}
|
|
}
|
|
|
|
func (p *Parser) parseCustomProperty() GrammarType {
|
|
p.initBuf()
|
|
if tt, data := p.popToken(false); tt != ColonToken {
|
|
p.l.r.Move(-len(data))
|
|
p.err, p.errPos = "expected colon in custom property", p.l.r.Offset()
|
|
p.l.r.Move(len(data))
|
|
return ErrorGrammar
|
|
}
|
|
val := []byte{}
|
|
for {
|
|
tt, data := p.l.Next()
|
|
if (tt == SemicolonToken || tt == RightBraceToken) && p.level == 0 || tt == ErrorToken {
|
|
p.prevEnd = (tt == RightBraceToken)
|
|
p.pushBuf(CustomPropertyValueToken, val)
|
|
return CustomPropertyGrammar
|
|
} else if tt == LeftParenthesisToken || tt == LeftBraceToken || tt == LeftBracketToken || tt == FunctionToken {
|
|
p.level++
|
|
} else if tt == RightParenthesisToken || tt == RightBraceToken || tt == RightBracketToken {
|
|
if p.level == 0 {
|
|
// TODO: buggy
|
|
p.pushBuf(tt, data)
|
|
p.err, p.errPos = "unexpected ending in custom property", p.l.r.Offset()
|
|
return ErrorGrammar
|
|
}
|
|
p.level--
|
|
}
|
|
val = append(val, data...)
|
|
}
|
|
}
|