Clipboard support for copying pasting and cutting

cursor.go

@@ -39,8 +39,8 @@ func (c *Cursor) HasSelection() bool {
 	return c.selectionEnd != c.selectionStart
 }
 
-// DeleteSelected deletes the currently selected text
-func (c *Cursor) DeleteSelected() {
+// DeleteSelection deletes the currently selected text
+func (c *Cursor) DeleteSelection() {
 	if c.selectionStart > c.selectionEnd {
 		c.v.eh.Remove(c.selectionEnd, c.selectionStart+1)
 		// Since the cursor is already at the selection start we don't need to move
@@ -52,6 +52,14 @@ func (c *Cursor) DeleteSelected() {
 	}
 }
 
+// GetSelection returns the cursor's selection
+func (c *Cursor) GetSelection() string {
+	if c.selectionStart > c.selectionEnd {
+		return string([]rune(c.v.buf.text)[c.selectionEnd : c.selectionStart+1])
+	}
+	return string([]rune(c.v.buf.text)[c.selectionStart : c.selectionEnd+1])
+}
+
 // RuneUnder returns the rune under the cursor
 func (c *Cursor) RuneUnder() rune {
 	line := c.v.buf.lines[c.y]

todolist.md

@@ -25,6 +25,9 @@
     - [x] Undo/redo stack
     - [ ] Functionality similar to nano
 
+- [x] Clipboard support
+    - [x] Ctrl-v, Ctrl-c, and Ctrl-x
+
 - [ ] Command execution
     - [ ] Allow executing simple commands at the bottom of the editor 
       (like vim or emacs)

view.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"github.com/atotto/clipboard"
 	"github.com/gdamore/tcell"
 	"strconv"
 )
@@ -145,7 +146,7 @@ func (v *View) HandleEvent(event tcell.Event) int {
 			ret = 2
 		case tcell.KeyBackspace2:
 			if v.cursor.HasSelection() {
-				v.cursor.DeleteSelected()
+				v.cursor.DeleteSelection()
 				v.cursor.ResetSelection()
 				ret = 2
 			} else if v.cursor.loc > 0 {
@@ -178,6 +179,36 @@ func (v *View) HandleEvent(event tcell.Event) int {
 		case tcell.KeyCtrlY:
 			v.eh.Redo()
 			ret = 2
+		case tcell.KeyCtrlC:
+			if v.cursor.HasSelection() {
+				if !clipboard.Unsupported {
+					clipboard.WriteAll(v.cursor.GetSelection())
+					ret = 2
+				}
+			}
+		case tcell.KeyCtrlX:
+			if v.cursor.HasSelection() {
+				if !clipboard.Unsupported {
+					clipboard.WriteAll(v.cursor.GetSelection())
+					v.cursor.DeleteSelection()
+					v.cursor.ResetSelection()
+					ret = 2
+				}
+			}
+		case tcell.KeyCtrlV:
+			if !clipboard.Unsupported {
+				if v.cursor.HasSelection() {
+					v.cursor.DeleteSelection()
+					v.cursor.ResetSelection()
+				}
+				clip, _ := clipboard.ReadAll()
+				v.eh.Insert(v.cursor.loc, clip)
+				// This is a bit weird... Not sure if there's a better way
+				for i := 0; i < Count(clip); i++ {
+					v.cursor.Right()
+				}
+				ret = 2
+			}
 		case tcell.KeyPgUp:
 			v.PageUp()
 			return 2
@@ -192,7 +223,7 @@ func (v *View) HandleEvent(event tcell.Event) int {
 			return 2
 		case tcell.KeyRune:
 			if v.cursor.HasSelection() {
-				v.cursor.DeleteSelected()
+				v.cursor.DeleteSelection()
 				v.cursor.ResetSelection()
 			}
 			v.eh.Insert(v.cursor.loc, string(e.Rune()))