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package vt100
import (
"html/template"
"net/http"
"sync"
"github.com/jaguilar/vt100"
)
// Handler is a type that knows how to serve the VT100 as an HTML
// page. This is useful as a way to debug problems, or display
// the state of the terminal to a user.
//
// TODO(jaguilar): move me to a subpackage, then export to the
// default mux automatically. This seems to be the way it's done
// in the std lib.
type handler struct {
*vt100.VT100
sync.Locker
}
var termTemplate = template.Must(template.New("vt100_html").Parse(`
<html><head><style>
.mono {
font-family: "monospace";
}</style>
<body>
<p>VT100 Terminal
<p>Dimensions {{.Height}}x{{.Width}}
<p><span class="mono">{{.ConsoleHTML}}</span>
</span>
</html>
`))
// ServeHTTP is part of the http.Handler interface.
func (v handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
v.Lock()
defer v.Unlock()
termTemplate.Execute(w, struct {
Height, Width int
ConsoleHTML template.HTML
}{v.Height, v.Width, template.HTML(v.HTML())})
}
// Export displays a status page showing the state of v under the given
// path. This page is added to the DefaultMux in the http package.
// You must provide a mutex we can lock while doing the export. You must
// not modify v without holding the mutex yourself, or else you could
// have a data race on your hands.
func Export(pattern string, v *vt100.VT100, l sync.Locker) {
http.Handle(pattern, handler{v, l})
}
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