58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
package html
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// Compile-time interface check.
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var _ Node = (*Responsive)(nil)
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// Responsive wraps multiple Layout variants for breakpoint-aware rendering.
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// Usage example: r := NewResponsive().Variant("mobile", NewLayout("C"))
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// Each variant is rendered inside a container with data-variant for CSS targeting.
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type Responsive struct {
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variants []responsiveVariant
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}
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type responsiveVariant struct {
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name string
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layout *Layout
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}
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// NewResponsive creates a new multi-variant responsive compositor.
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// Usage example: r := NewResponsive()
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func NewResponsive() *Responsive {
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return &Responsive{}
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}
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// Variant adds a named layout variant (e.g., "desktop", "tablet", "mobile").
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// Usage example: NewResponsive().Variant("desktop", NewLayout("HLCRF"))
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// Variants render in insertion order.
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func (r *Responsive) Variant(name string, layout *Layout) *Responsive {
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if r == nil {
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r = NewResponsive()
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}
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r.variants = append(r.variants, responsiveVariant{name: name, layout: layout})
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return r
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}
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// Render produces HTML with each variant in a data-variant container.
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// Usage example: html := NewResponsive().Variant("mobile", NewLayout("C")).Render(NewContext())
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func (r *Responsive) Render(ctx *Context) string {
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if r == nil {
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return ""
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}
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if ctx == nil {
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ctx = NewContext()
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}
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b := newTextBuilder()
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for _, v := range r.variants {
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if v.layout == nil {
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continue
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}
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b.WriteString(`<div data-variant="`)
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b.WriteString(escapeAttr(v.name))
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b.WriteString(`">`)
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b.WriteString(v.layout.Render(ctx))
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b.WriteString(`</div>`)
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}
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return b.String()
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}
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