Method Minify

css/css.go:138–172

Minify minifies CSS data, it reads from r and writes to w.

(m *minify.M, w io.Writer, r io.Reader, params map[string]string)

// Minify minifies CSS data, it reads from r and writes to w.
func (o *Minifier) Minify(m *minify.M, w io.Writer, r io.Reader, params map[string]string) error {
	tmp := &Minifier{}
	*tmp = *o
	o = tmp

	o.newPrecision = o.Precision
	if o.newPrecision <= 0 || 15 < o.newPrecision {
		o.newPrecision = 15 // minimum number of digits a double can represent exactly
	}
	if !o.Inline {
		o.Inline = params != nil && params["inline"] == "1"
	}
	if o.Version <= 0 {
		o.Version = 3
	}

	z := parse.NewInput(r)
	defer z.Restore()

	c := &cssMinifier{
		m: m,
		w: w,
		p: css.NewParser(z, o.Inline),
		o: o,
	}
	c.minifyGrammar()

	if _, err := w.Write(nil); err != nil {
		return err
	}
	if c.p.Err() == io.EOF {
		return nil
	}
	return c.p.Err()
}

func (c *cssMinifier) minifyGrammar() {
	semicolonQueued := false