forked from Mirrors/bubbletea
54 lines
1.6 KiB
Go
54 lines
1.6 KiB
Go
package tea
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// Convenience commands. Note part of the Bubble Tea core, but potentially
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// handy.
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import (
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"time"
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)
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// Every is a command that ticks in sync with the system clock. So, if you
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// wanted to tick with the system clock every second, minute or hour you
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// could use this. It's also handy for having different things tick in sync.
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//
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// Because we're ticking with the system clock the tick will likely not run for
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// the entire specified duration. For example, if we're ticking for one minute
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// and the clock is at 12:34:20 then the next tick will happen at 12:35:00, 40
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// seconds later.
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//
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// To produce the command, pass a duration and a function which returns
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// a message containing the time at which the tick occurred.
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//
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// type TickMsg time.Time
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//
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// cmd := Every(time.Second, func(t time.Time) Msg {
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// return TickMsg(t)
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// })
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func Every(duration time.Duration, fn func(time.Time) Msg) Cmd {
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return func() Msg {
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n := time.Now()
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d := n.Truncate(duration).Add(duration).Sub(n)
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t := time.NewTimer(d)
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return fn(<-t.C)
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}
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}
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// Tick produces a command that at an interval independent of the system clock
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// at the given duration. That is, the timer begins when precisely when
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// invoked, and runs for its entire duration.
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//
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// To produce the command, pass a duration and a function which returns
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// a message containing the time at which the tick occurred.
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//
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// type TickMsg time.Time
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//
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// cmd := Tick(time.Second, func(t time.Time) Msg {
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// return TickMsg(t)
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// })
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func Tick(d time.Duration, fn func(time.Time) Msg) Cmd {
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return func() Msg {
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t := time.NewTimer(d)
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return fn(<-t.C)
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}
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}
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