diff options
Diffstat (limited to 'vendor/github.com/tdewolff/minify/xml/xml.go')
| -rw-r--r-- | vendor/github.com/tdewolff/minify/xml/xml.go | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/vendor/github.com/tdewolff/minify/xml/xml.go b/vendor/github.com/tdewolff/minify/xml/xml.go deleted file mode 100644 index 9486e34..0000000 --- a/vendor/github.com/tdewolff/minify/xml/xml.go +++ /dev/null @@ -1,196 +0,0 @@ -// Package xml minifies XML1.0 following the specifications at http://www.w3.org/TR/xml/. -package xml // import "github.com/tdewolff/minify/xml" - -import ( - "io" - - "github.com/tdewolff/minify" - "github.com/tdewolff/parse" - "github.com/tdewolff/parse/xml" -) - -var ( - isBytes = []byte("=") - spaceBytes = []byte(" ") - voidBytes = []byte("/>") -) - -//////////////////////////////////////////////////////////////// - -// DefaultMinifier is the default minifier. -var DefaultMinifier = &Minifier{} - -// Minifier is an XML minifier. -type Minifier struct { - KeepWhitespace bool -} - -// Minify minifies XML data, it reads from r and writes to w. -func Minify(m *minify.M, w io.Writer, r io.Reader, params map[string]string) error { - return DefaultMinifier.Minify(m, w, r, params) -} - -// Minify minifies XML data, it reads from r and writes to w. -func (o *Minifier) Minify(m *minify.M, w io.Writer, r io.Reader, _ map[string]string) error { - omitSpace := true // on true the next text token must not start with a space - - attrByteBuffer := make([]byte, 0, 64) - - l := xml.NewLexer(r) - defer l.Restore() - - tb := NewTokenBuffer(l) - for { - t := *tb.Shift() - if t.TokenType == xml.CDATAToken { - if len(t.Text) == 0 { - continue - } - if text, useText := xml.EscapeCDATAVal(&attrByteBuffer, t.Text); useText { - t.TokenType = xml.TextToken - t.Data = text - } - } - switch t.TokenType { - case xml.ErrorToken: - if l.Err() == io.EOF { - return nil - } - return l.Err() - case xml.DOCTYPEToken: - if _, err := w.Write(t.Data); err != nil { - return err - } - case xml.CDATAToken: - if _, err := w.Write(t.Data); err != nil { - return err - } - if len(t.Text) > 0 && parse.IsWhitespace(t.Text[len(t.Text)-1]) { - omitSpace = true - } - case xml.TextToken: - t.Data = parse.ReplaceMultipleWhitespace(t.Data) - - // whitespace removal; trim left - if omitSpace && (t.Data[0] == ' ' || t.Data[0] == '\n') { - t.Data = t.Data[1:] - } - - // whitespace removal; trim right - omitSpace = false - if len(t.Data) == 0 { - omitSpace = true - } else if t.Data[len(t.Data)-1] == ' ' || t.Data[len(t.Data)-1] == '\n' { - omitSpace = true - i := 0 - for { - next := tb.Peek(i) - // trim if EOF, text token with whitespace begin or block token - if next.TokenType == xml.ErrorToken { - t.Data = t.Data[:len(t.Data)-1] - omitSpace = false - break - } else if next.TokenType == xml.TextToken { - // this only happens when a comment, doctype, cdata startpi tag was in between - // remove if the text token starts with a whitespace - if len(next.Data) > 0 && parse.IsWhitespace(next.Data[0]) { - t.Data = t.Data[:len(t.Data)-1] - omitSpace = false - } - break - } else if next.TokenType == xml.CDATAToken { - if len(next.Text) > 0 && parse.IsWhitespace(next.Text[0]) { - t.Data = t.Data[:len(t.Data)-1] - omitSpace = false - } - break - } else if next.TokenType == xml.StartTagToken || next.TokenType == xml.EndTagToken { - if !o.KeepWhitespace { - t.Data = t.Data[:len(t.Data)-1] - omitSpace = false - } - break - } - i++ - } - } - - if _, err := w.Write(t.Data); err != nil { - return err - } - case xml.StartTagToken: - if o.KeepWhitespace { - omitSpace = false - } - if _, err := w.Write(t.Data); err != nil { - return err - } - case xml.StartTagPIToken: - if _, err := w.Write(t.Data); err != nil { - return err - } - case xml.AttributeToken: - if _, err := w.Write(spaceBytes); err != nil { - return err - } - if _, err := w.Write(t.Text); err != nil { - return err - } - if _, err := w.Write(isBytes); err != nil { - return err - } - - if len(t.AttrVal) < 2 { - if _, err := w.Write(t.AttrVal); err != nil { - return err - } - } else { - // prefer single or double quotes depending on what occurs more often in value - val := xml.EscapeAttrVal(&attrByteBuffer, t.AttrVal[1:len(t.AttrVal)-1]) - if _, err := w.Write(val); err != nil { - return err - } - } - case xml.StartTagCloseToken: - next := tb.Peek(0) - skipExtra := false - if next.TokenType == xml.TextToken && parse.IsAllWhitespace(next.Data) { - next = tb.Peek(1) - skipExtra = true - } - if next.TokenType == xml.EndTagToken { - // collapse empty tags to single void tag - tb.Shift() - if skipExtra { - tb.Shift() - } - if _, err := w.Write(voidBytes); err != nil { - return err - } - } else { - if _, err := w.Write(t.Text); err != nil { - return err - } - } - case xml.StartTagCloseVoidToken: - if _, err := w.Write(t.Text); err != nil { - return err - } - case xml.StartTagClosePIToken: - if _, err := w.Write(t.Text); err != nil { - return err - } - case xml.EndTagToken: - if o.KeepWhitespace { - omitSpace = false - } - if len(t.Data) > 3+len(t.Text) { - t.Data[2+len(t.Text)] = '>' - t.Data = t.Data[:3+len(t.Text)] - } - if _, err := w.Write(t.Data); err != nil { - return err - } - } - } -} |