75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
package html
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import (
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"strings"
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"forge.lthn.ai/core/go-i18n/reversal"
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)
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// StripTags removes HTML tags from rendered output, returning plain text.
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// Tag boundaries are replaced with a single space; result is trimmed.
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func StripTags(html string) string {
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var b strings.Builder
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inTag := false
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for _, r := range html {
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if r == '<' {
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inTag = true
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b.WriteByte(' ')
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continue
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}
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if r == '>' {
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inTag = false
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continue
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}
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if !inTag {
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b.WriteRune(r)
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}
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}
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// Collapse multiple spaces into one.
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result := b.String()
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for strings.Contains(result, " ") {
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result = strings.ReplaceAll(result, " ", " ")
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}
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return strings.TrimSpace(result)
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}
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// Imprint renders a node tree to HTML, strips tags, tokenises the text,
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// and returns a GrammarImprint — the full render-reverse pipeline.
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func Imprint(node Node, ctx *Context) reversal.GrammarImprint {
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if ctx == nil {
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ctx = NewContext()
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}
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rendered := node.Render(ctx)
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text := StripTags(rendered)
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tok := reversal.NewTokeniser()
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tokens := tok.Tokenise(text)
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return reversal.NewImprint(tokens)
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}
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// CompareVariants runs the imprint pipeline on each responsive variant independently
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// and returns pairwise similarity scores. Key format: "name1:name2".
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func CompareVariants(r *Responsive, ctx *Context) map[string]float64 {
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if ctx == nil {
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ctx = NewContext()
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}
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type named struct {
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name string
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imp reversal.GrammarImprint
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}
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var imprints []named
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for _, v := range r.variants {
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imp := Imprint(v.layout, ctx)
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imprints = append(imprints, named{name: v.name, imp: imp})
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}
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scores := make(map[string]float64)
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for i := 0; i < len(imprints); i++ {
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for j := i + 1; j < len(imprints); j++ {
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key := imprints[i].name + ":" + imprints[j].name
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scores[key] = imprints[i].imp.Similar(imprints[j].imp)
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}
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}
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return scores
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}
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