package ace import ( "fmt" "strings" ) const unicodeSpace = 32 const indentTop = 0 // line represents a line of codes. type line struct { no int str string indent int tokens []string opts *Options file *File } // isEmpty returns true if the line is empty. func (l *line) isEmpty() bool { return strings.TrimSpace(l.str) == "" } // isTopIndent returns true if the line's indent is the top level. func (l *line) isTopIndent() bool { return l.indent == indentTop } // isHelperMethod returns true if the line is a helper method. func (l *line) isHelperMethod() bool { return len(l.tokens) > 1 && l.tokens[0] == equal } // isHelperMethodOf returns true if the line is a specified helper method. func (l *line) isHelperMethodOf(name string) bool { return l.isHelperMethod() && l.tokens[1] == name } // isPlainText returns true if the line is a plain text. func (l *line) isPlainText() bool { return len(l.tokens) > 0 && (l.tokens[0] == pipe || l.tokens[0] == doublePipe) } // isComment returns true if the line is a comment. func (l *line) isComment() bool { return len(l.tokens) > 0 && l.tokens[0] == slash } // isHTMLComment returns true if the line is an HTML comment. func (l *line) isHTMLComment() bool { return len(l.tokens) > 0 && l.tokens[0] == slash+slash } // isAction returns true if the line is an action. func (l *line) isAction() bool { str := strings.TrimSpace(l.str) return strings.HasPrefix(str, l.opts.DelimLeft) && strings.HasSuffix(str, l.opts.DelimRight) } // fileName returns the file name. func (l *line) fileName() string { return l.file.path + dot + l.opts.Extension } // childOf returns true if the line is a child of the element. func (l *line) childOf(parent element) (bool, error) { var ok bool var err error switch { case l.isEmpty(): ok = true case parent.ContainPlainText(): switch { case parent.Base().ln.indent < l.indent: ok = true } default: switch { case l.indent == parent.Base().ln.indent+1: ok = true case l.indent > parent.Base().ln.indent+1: err = fmt.Errorf("the indent is invalid [file: %s][line: %d]", l.fileName(), l.no) } } return ok, err } // newLine creates and returns a line. func newLine(no int, str string, opts *Options, f *File) *line { return &line{ no: no, str: str, indent: indent(str), tokens: strings.Split(strings.TrimLeft(str, space), space), opts: opts, file: f, } } // indent returns the line's indent. func indent(str string) int { var i int for _, b := range str { if b != unicodeSpace { break } i++ } return i / 2 }