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71 lines
1.5 KiB
71 lines
1.5 KiB
package funcs
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import (
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"code.google.com/p/go.net/html"
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"fmt"
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"regexp"
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)
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type Displayer interface {
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Display(nodes []*html.Node)
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}
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type TextDisplayer struct {
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}
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func (t TextDisplayer) Display(nodes []*html.Node) {
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for _, node := range nodes {
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if node.Type == html.TextNode {
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fmt.Println(node.Data)
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}
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children := []*html.Node{}
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child := node.FirstChild
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for child != nil {
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children = append(children, child)
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child = child.NextSibling
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}
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t.Display(children)
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}
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}
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type AttrDisplayer struct {
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Attr string
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}
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func (a AttrDisplayer) Display(nodes []*html.Node) {
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for _, node := range nodes {
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attributes := node.Attr
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for _, attr := range attributes {
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if attr.Key == a.Attr {
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val := html.EscapeString(attr.Val)
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fmt.Printf("%s\n", val)
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}
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}
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}
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}
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var (
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// Display function helpers
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displayMatcher *regexp.Regexp = regexp.MustCompile(`\{[^\}]*\}$`)
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textFuncMatcher = regexp.MustCompile(`^text\{\}$`)
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attrFuncMatcher = regexp.MustCompile(`^attr\{([^\}]*)\}$`)
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)
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func NewDisplayFunc(text string) (Displayer, error) {
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if !displayMatcher.MatchString(text) {
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return nil, fmt.Errorf("Not a display function")
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}
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switch {
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case textFuncMatcher.MatchString(text):
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return TextDisplayer{}, nil
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case attrFuncMatcher.MatchString(text):
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matches := attrFuncMatcher.FindStringSubmatch(text)
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if len(matches) != 2 {
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return nil, fmt.Errorf("")
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} else {
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return AttrDisplayer{matches[1]}, nil
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}
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}
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return nil, fmt.Errorf("Not a display function")
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}
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