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// Copyright 2014 The gocui Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package gocui
import (
"unicode"
)
// Editor interface must be satisfied by gocui editors.
type Editor interface {
Edit(v *View, key Key, ch rune, mod Modifier) bool
}
// The EditorFunc type is an adapter to allow the use of ordinary functions as
// Editors. If f is a function with the appropriate signature, EditorFunc(f)
// is an Editor object that calls f.
type EditorFunc func(v *View, key Key, ch rune, mod Modifier) bool
// Edit calls f(v, key, ch, mod)
func (f EditorFunc) Edit(v *View, key Key, ch rune, mod Modifier) bool {
return f(v, key, ch, mod)
}
// DefaultEditor is the default editor.
var DefaultEditor Editor = EditorFunc(SimpleEditor)
// SimpleEditor is used as the default gocui editor.
func SimpleEditor(v *View, key Key, ch rune, mod Modifier) bool {
switch {
case key == KeyBackspace || key == KeyBackspace2:
v.TextArea.BackSpaceChar()
case key == KeyCtrlD || key == KeyDelete:
v.TextArea.DeleteChar()
case key == KeyArrowDown:
v.TextArea.MoveCursorDown()
case key == KeyArrowUp:
v.TextArea.MoveCursorUp()
case key == KeyArrowLeft && (mod&ModAlt) != 0:
v.TextArea.MoveLeftWord()
case key == KeyArrowLeft:
v.TextArea.MoveCursorLeft()
case key == KeyArrowRight && (mod&ModAlt) != 0:
v.TextArea.MoveRightWord()
case key == KeyArrowRight:
v.TextArea.MoveCursorRight()
case key == KeyEnter:
v.TextArea.TypeRune('\n')
case key == KeySpace:
v.TextArea.TypeRune(' ')
case key == KeyInsert:
v.TextArea.ToggleOverwrite()
case key == KeyCtrlU:
v.TextArea.DeleteToStartOfLine()
case key == KeyCtrlK:
v.TextArea.DeleteToEndOfLine()
case key == KeyCtrlA || key == KeyHome:
v.TextArea.GoToStartOfLine()
case key == KeyCtrlE || key == KeyEnd:
v.TextArea.GoToEndOfLine()
case key == KeyCtrlW:
v.TextArea.BackSpaceWord()
case key == KeyCtrlY:
v.TextArea.Yank()
case unicode.IsPrint(ch):
v.TextArea.TypeRune(ch)
default:
return false
}
v.RenderTextArea()
return true
}
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