all repos — gomponents @ 6d2fb0eeb15d6b9774f127517d160137251264a4

HTML components in pure Go

Add Group function to group Nodes (#29)

Markus Wüstenberg
commit

6d2fb0eeb15d6b9774f127517d160137251264a4

parent

f2a2b949704e2faa7117dd33aae8da551a4baf8e

1 file changed, 36 insertions(+), 11 deletions(-)

changed files
M gomponents.gogomponents.go
@@ -64,17 +64,7 @@ return b.String()
} for _, c := range children { - if p, ok := c.(Placer); ok { - switch p.Place() { - case Inside: - inside.WriteString(c.Render()) - case Outside: - outside.WriteString(c.Render()) - } - continue - } - // If c doesn't implement Placer, default to outside - outside.WriteString(c.Render()) + renderChild(c, &inside, &outside) } b.WriteString(inside.String())
@@ -91,6 +81,26 @@ b.WriteString(name)
b.WriteString(">") return b.String() } +} + +func renderChild(c Node, inside, outside *strings.Builder) { + if g, ok := c.(group); ok { + for _, groupC := range g.children { + renderChild(groupC, inside, outside) + } + return + } + if p, ok := c.(Placer); ok { + switch p.Place() { + case Inside: + inside.WriteString(c.Render()) + case Outside: + outside.WriteString(c.Render()) + } + return + } + // If c doesn't implement Placer, default to outside + outside.WriteString(c.Render()) } // Attr creates an attr DOM Node.
@@ -156,3 +166,18 @@ func Write(w io.Writer, n Node) error {
_, err := w.Write([]byte(n.Render())) return err } + +type group struct { + children []Node +} + +func (g group) Render() string { + panic("cannot render group") +} + +// Group multiple Nodes into one Node. Useful for concatenation of Nodes in variadic functions. +// The resulting Node cannot Render directly, trying it will panic. +// Render must happen through a parent element created with El or a helper. +func Group(children []Node) Node { + return group{children: children} +}