60 lines
1.2 KiB
Go
60 lines
1.2 KiB
Go
package prompt
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import "log"
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type History struct {
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histories []string
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tmp []string
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selected int
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}
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func (h *History) Add(input string) {
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h.histories = append(h.histories, input)
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h.Clear()
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}
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func (h *History) Clear() {
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h.tmp = make([]string, len(h.histories))
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for i := range h.histories {
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h.tmp[i] = h.histories[i]
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}
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h.tmp = append(h.tmp, "")
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h.selected = len(h.tmp) - 1
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}
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func (h *History) Older(buf *Buffer) (new *Buffer, changed bool) {
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log.Printf("[DEBUG] Before %#v\n", h)
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if len(h.tmp) == 1 || h.selected == 0 {
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return buf, false
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}
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h.tmp[h.selected] = buf.Text()
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h.selected--
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new = NewBuffer()
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new.InsertText(h.tmp[h.selected], false, true)
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log.Printf("[DEBUG] After %#v\n", h)
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return new, true
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}
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func (h *History) Newer(buf *Buffer) (new *Buffer, changed bool) {
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log.Printf("[DEBUG] Before %#v\n", h)
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if h.selected >= len(h.tmp)-1 {
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return buf, false
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}
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h.tmp[h.selected] = buf.Text()
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h.selected++
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new = NewBuffer()
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new.InsertText(h.tmp[h.selected], false, true)
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log.Printf("[DEBUG] After %#v\n", h)
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return new, true
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}
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func NewHistory() *History {
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return &History{
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histories: []string{},
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tmp: []string{""},
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selected: 0,
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}
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}
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