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// SPDX-License-Identifier: Unlicense OR MIT
package router
import (
"gioui.org/io/event"
)
type clipboardQueue struct {
receivers map[event.Tag]struct{}
// request avoid read clipboard every frame while waiting.
requested bool
text *string
}
// WriteClipboard returns the most recent text to be copied
// to the clipboard, if any.
func (q *clipboardQueue) WriteClipboard() (string, bool) {
if q.text == nil {
return "", false
}
text := *q.text
q.text = nil
return text, true
}
// ReadClipboard reports if any new handler is waiting
// to read the clipboard.
func (q *clipboardQueue) ReadClipboard() bool {
if len(q.receivers) == 0 || q.requested {
return false
}
q.requested = true
return true
}
func (q *clipboardQueue) Push(e event.Event, events *handlerEvents) {
for r := range q.receivers {
events.Add(r, e)
delete(q.receivers, r)
}
}
func (q *clipboardQueue) ProcessWriteClipboard(refs []interface{}) {
q.text = refs[0].(*string)
}
func (q *clipboardQueue) ProcessReadClipboard(refs []interface{}) {
if q.receivers == nil {
q.receivers = make(map[event.Tag]struct{})
}
tag := refs[0].(event.Tag)
if _, ok := q.receivers[tag]; !ok {
q.receivers[tag] = struct{}{}
q.requested = false
}
}
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