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yakumo_izuru |
1.1 |
package gcss |
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import ( |
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"fmt" |
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"strings" |
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) |
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const unicodeSpace = 32 |
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const indentTop = 0 |
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// line represents a line of codes. |
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type line struct { |
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no int |
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s string |
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indent int |
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} |
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// isEmpty returns true if the line's s is zero value. |
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func (ln *line) isEmpty() bool { |
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return strings.TrimSpace(ln.s) == "" |
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} |
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// isTopIndent returns true if the line's indent is the top level. |
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func (ln *line) isTopIndent() bool { |
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return ln.indent == indentTop |
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} |
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// childOf returns true if the line is a child of the parent. |
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func (ln *line) childOf(parent element) (bool, error) { |
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var ok bool |
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var err error |
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switch pIndent := parent.Base().ln.indent; { |
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case ln.indent == pIndent+1: |
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ok = true |
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case ln.indent > pIndent+1: |
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err = fmt.Errorf("indent is invalid [line: %d]", ln.no) |
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} |
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return ok, err |
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} |
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// isDeclaration returns true if the line is a declaration. |
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func (ln *line) isDeclaration() bool { |
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_, _, err := declarationPV(ln) |
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return err == nil |
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} |
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// isAtRule returns true if the line is an at-rule. |
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func (ln *line) isAtRule() bool { |
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return strings.HasPrefix(strings.TrimSpace(ln.s), atMark) |
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} |
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// isVariable returns true if the line is a variable. |
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func (ln *line) isVariable() bool { |
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if !ln.isTopIndent() { |
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return false |
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} |
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_, _, err := variableNV(ln) |
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return err == nil |
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} |
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// isMixinDeclaration returns true if the line is a mixin declaration. |
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func (ln *line) isMixinDeclaration() bool { |
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if !ln.isTopIndent() { |
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return false |
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} |
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_, _, err := mixinNP(ln, true) |
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return err == nil |
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} |
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// isMixinInvocation returns true if the line is a mixin invocation. |
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func (ln *line) isMixinInvocation() bool { |
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if ln.isTopIndent() { |
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return false |
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} |
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_, _, err := mixinNP(ln, false) |
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return err == nil |
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} |
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// isComment returns true if the line is a comment. |
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func (ln *line) isComment() bool { |
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return strings.HasPrefix(strings.TrimSpace(ln.s), doubleSlash) |
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} |
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// newLine creates and returns a line. |
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func newLine(no int, s string) *line { |
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return &line{ |
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no: no, |
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s: s, |
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indent: indent(s), |
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} |
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} |
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// indent returns the string's indent. |
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func indent(s string) int { |
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var i int |
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for _, b := range s { |
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if b != unicodeSpace { |
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break |
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} |
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i++ |
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} |
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return i / 2 |
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} |
