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selection.go
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/
selection.go
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package main
import "github.com/kybin/tor/cell"
// Selection is selection for text.
// When it is off, rng is invalid and treated as [(-1,-1):(-1,-1)].
type Selection struct {
on bool
rng cell.Range
text *Text
}
func NewSelection(text *Text) *Selection {
return &Selection{text: text}
}
func (s *Selection) SetStart(p cell.Pt) {
s.rng.Start = p
}
func (s *Selection) SetEnd(p cell.Pt) {
s.rng.End = p
}
// Lines return selected line numbers as int slice.
// Note it will not return last line number if last cursor's offset is 0.
func (s *Selection) Lines() []int {
if !s.on {
return nil
}
return s.rng.Lines()
}
func (s *Selection) Min() cell.Pt {
if !s.on {
return cell.Pt{-1, -1}
}
return s.rng.Min()
}
func (s *Selection) Max() cell.Pt {
if !s.on {
return cell.Pt{-1, -1}
}
return s.rng.Max()
}
func (s *Selection) MinMax() (cell.Pt, cell.Pt) {
if !s.on {
return cell.Pt{-1, -1}, cell.Pt{-1, -1}
}
return s.rng.MinMax()
}
func (s *Selection) Contains(p cell.Pt) bool {
if !s.on {
return false
}
return s.rng.Contains(p)
}
func (s *Selection) Data() string {
if !s.on {
return ""
}
return s.text.DataInside(s.MinMax())
}