88 lines
2.2 KiB
Go
88 lines
2.2 KiB
Go
//go:build !js
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package html
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import (
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core "dappco.re/go/core"
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"dappco.re/go/core/i18n/reversal"
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)
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// StripTags removes HTML tags from rendered output, returning plain text.
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// Usage example: text := StripTags("<main>Hello <strong>world</strong></main>")
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// Tag boundaries are collapsed into single spaces; result is trimmed.
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// Does not handle script/style element content (go-html does not generate these).
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func StripTags(html string) string {
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b := core.NewBuilder()
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inTag := false
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prevSpace := true // starts true to trim leading space
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for _, r := range html {
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if r == '<' {
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inTag = true
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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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if !prevSpace {
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b.WriteByte(' ')
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prevSpace = true
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}
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continue
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}
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if !inTag {
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if r == ' ' || r == '\t' || r == '\n' {
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if !prevSpace {
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b.WriteByte(' ')
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prevSpace = true
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}
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} else {
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b.WriteRune(r)
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prevSpace = false
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}
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}
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}
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return core.Trim(b.String())
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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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// Usage example: imp := Imprint(Text("welcome"), NewContext())
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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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// Usage example: scores := CompareVariants(NewResponsive(), NewContext())
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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 := range len(imprints) {
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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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