91 lines
1.5 KiB
Go
91 lines
1.5 KiB
Go
package views
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import (
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log "github.com/sirupsen/logrus"
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)
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const maxBuff = 10
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type buffWatcher interface {
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changed(s string)
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active(state bool)
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}
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type cmdBuff struct {
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buff []rune
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hotKey rune
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active bool
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listeners []buffWatcher
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}
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func newCmdBuff(key rune) *cmdBuff {
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return &cmdBuff{
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hotKey: key,
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buff: make([]rune, 0, maxBuff),
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listeners: []buffWatcher{},
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}
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}
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func (c *cmdBuff) isActive() bool {
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log.Debugf("Cmd buff `%s Active:%t", string(c.hotKey), c.active)
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return c.active
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}
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func (c *cmdBuff) setActive(b bool) {
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log.Debugf("Cmd buff `%s SetActive:%t", string(c.hotKey), b)
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c.active = b
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c.fireActive(c.active)
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}
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// String turns rune to string (Stringer protocol)
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func (c *cmdBuff) String() string {
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return string(c.buff)
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}
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func (c *cmdBuff) add(r rune) {
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c.buff = append(c.buff, r)
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c.fireChanged()
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}
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func (c *cmdBuff) del() {
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if c.empty() {
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return
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}
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c.buff = c.buff[:len(c.buff)-1]
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c.fireChanged()
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}
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func (c *cmdBuff) clear() {
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c.buff = make([]rune, 0, maxBuff)
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c.fireChanged()
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}
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func (c *cmdBuff) reset() {
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c.clear()
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c.fireChanged()
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c.setActive(false)
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}
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func (c *cmdBuff) empty() bool {
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return len(c.buff) == 0
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}
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// ----------------------------------------------------------------------------
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// Event Listeners...
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func (c *cmdBuff) addListener(w ...buffWatcher) {
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c.listeners = append(c.listeners, w...)
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}
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func (c *cmdBuff) fireChanged() {
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for _, l := range c.listeners {
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l.changed(c.String())
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}
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}
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func (c *cmdBuff) fireActive(b bool) {
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for _, l := range c.listeners {
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l.active(b)
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}
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}
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