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package ui
import (
"log"
"syscall/js"
"unicode/utf8"
)
// rmueller's version from:
// ://stackoverflow.com/questions/1752414/how-to-reverse-a-string-in-go?page=1&tab=scoredesc#tab-top
func reverseString(s string) string {
size := len(s)
buf := make([]byte, size)
for start := 0; start < size; {
r, n := utf8.DecodeRuneInString(s[start:])
start += n
utf8.EncodeRune(buf[size-start:], r)
}
return string(buf)
}
func (ti *TextInput) Focus(focus bool) {
ti.focused = focus
log.Printf("%v set focus: %v\n", ti, focus)
if focus {
d := js.Global().Get("document")
i := d.Call("getElementById", "hiddenInput")
// i.Call("focus", map[string]any{"preventScroll": true, "focusVisible": false})
i.Call("focus")
log.Println("open keyboard")
log.Printf("set hidden input value to %s", ti.Text())
// i.Set("value", ti.Text())
i.Set("value", reverseString(ti.Text()))
}
}
func (ti *TextInput) Update() error {
if ti.focused {
d := js.Global().Get("document")
i := d.Call("getElementById", "hiddenInput")
// t := i.Get("value").String()
t := reverseString(i.Get("value").String())
ti.SetInput(t)
}
return nil
}
func (*TextInput) IsUpdatable() bool { return true }
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