Cut/copy/paste

clipboard.go

@@ -0,0 +1,53 @@
+package main
+
+import "github.com/zyedidia/clipboard"
+
+type ClipMethod uint8
+
+const (
+	ClipExternal ClipMethod = iota
+	_
+	ClipInternal
+)
+
+var ClipCurrentMethod ClipMethod
+
+var internalClipboard string
+
+// ClipInitialize will initialize the clipboard for the given method first,
+// and if that fails, an internal method will be chosen, instead. The Method
+// chosen is returned along with any error that may have occurred while
+// selecting the method. The error is not fatal because an internal method
+// is used.
+func ClipInitialize(m ClipMethod) (ClipMethod, error) {
+	err := clipboard.Initialize()
+	if err != nil {
+		ClipCurrentMethod = ClipInternal
+		return ClipInternal, err
+	}
+	ClipCurrentMethod = ClipExternal
+	return ClipExternal, nil
+}
+
+// ClipRead receives the clipboard contents using the ClipCurrentMethod.
+func ClipRead() (string, error) {
+	switch ClipCurrentMethod {
+	case ClipExternal:
+		return clipboard.ReadAll("clipboard")
+	case ClipInternal:
+		return internalClipboard, nil
+	}
+	panic("How did execution get here?")
+}
+
+// ClipWrite sets the clipboard contents using the ClipCurrentMethod.
+func ClipWrite(content string) error {
+	switch ClipCurrentMethod {
+	case ClipExternal:
+		return clipboard.WriteAll(content, "clipboard")
+	case ClipInternal:
+		internalClipboard = content
+		return nil
+	}
+	panic("How did execution get here?")
+}

go.mod

@@ -2,4 +2,7 @@ module github.com/fivemoreminix/diesel
 
 go 1.12
 
-require github.com/gdamore/tcell/v2 v2.2.0
+require (
+	github.com/gdamore/tcell/v2 v2.2.0
+	github.com/zyedidia/clipboard v1.0.3 // indirect
+)

go.sum

@@ -8,6 +8,8 @@ github.com/mattn/go-runewidth v0.0.10 h1:CoZ3S2P7pvtP45xOtBw+/mDL2z0RKI576gSkzRR
 github.com/mattn/go-runewidth v0.0.10/go.mod h1:RAqKPSqVFrSLVXbA8x7dzmKdmGzieGRCM46jaSJTDAk=
 github.com/rivo/uniseg v0.1.0 h1:+2KBaVoUmb9XzDsrx/Ct0W/EYOSFf/nWTauy++DprtY=
 github.com/rivo/uniseg v0.1.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+github.com/zyedidia/clipboard v1.0.3 h1:F/nCDVYMdbDWTmY8s8cJl0tnwX32q96IF09JHM14bUI=
+github.com/zyedidia/clipboard v1.0.3/go.mod h1:zykFnZUXX0ErxqvYLUFEq7QDJKId8rmh2FgD0/Y8cjA=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 h1:nxC68pudNYkKU6jWhgrqdreuFiOQWj1Fs7T3VrH4Pjw=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/term v0.0.0-20201210144234-2321bbc49cbf h1:MZ2shdL+ZM/XzY3ZGOnh4Nlpnxz5GSOhOmtHo3iPU6M=

main.go

@@ -34,19 +34,17 @@ func main() {
 	}
 	defer s.Fini() // Useful for handling panics
 
-	// defer func() {
-	// 	if err := recover(); err != nil {
-	// 		s.Fini()
-	// 		fmt.Fprintln(os.Stderr, err)
-	// 	}
-	// }()
-
 	sizex, sizey := s.Size()
 
 	tabContainer := ui.NewTabContainer(&theme)
 	tabContainer.SetPos(0, 1)
 	tabContainer.SetSize(sizex, sizey-1)
 
+	_, err := ClipInitialize(ClipExternal)
+	if err != nil {
+		panic(err)
+	}
+
 	// Load files from command-line arguments
 	if len(os.Args) > 1 {
 		for _, path := range os.Args[1:] {
@@ -148,8 +146,37 @@ func main() {
 		os.Exit(0)
 	}}}))
 
-	bar.AddMenu(ui.NewMenu("Edit", &theme, []ui.Item{&ui.ItemEntry{Name: "New", Callback: func() {
-		s.Beep()
+	bar.AddMenu(ui.NewMenu("Edit", &theme, []ui.Item{&ui.ItemEntry{Name: "Cut", Callback: func() {
+		if tabContainer.GetTabCount() > 0 {
+			tab := tabContainer.GetTab(tabContainer.GetSelectedTabIdx())
+			te := tab.Child.(*ui.TextEdit)
+			selectedStr := te.GetSelectedString()
+			if selectedStr != "" { // If something is selected...
+				te.Delete(false) // Delete the selection
+				// TODO: better error handling within editor
+				_ = ClipWrite(selectedStr) // Add the selectedStr to clipboard
+			}
+		}
+	}}, &ui.ItemEntry{Name: "Copy", Callback: func() {
+		if tabContainer.GetTabCount() > 0 {
+			tab := tabContainer.GetTab(tabContainer.GetSelectedTabIdx())
+			te := tab.Child.(*ui.TextEdit)
+			selectedStr := te.GetSelectedString()
+			if selectedStr != "" { // If there is something selected...
+				_ = ClipWrite(selectedStr) // Add selectedStr to clipboard
+			}
+		}
+	}}, &ui.ItemEntry{Name: "Paste", Callback: func() {
+		if tabContainer.GetTabCount() > 0 {
+			tab := tabContainer.GetTab(tabContainer.GetSelectedTabIdx())
+			te := tab.Child.(*ui.TextEdit)
+			
+			contents, err := ClipRead()
+			if err != nil {
+				panic(err)
+			}
+			te.Insert(contents)
+		}
 	}}}))
 
 	bar.AddMenu(ui.NewMenu("Search", &theme, []ui.Item{&ui.ItemEntry{Name: "New", Callback: func() {

util.go

@@ -1,10 +0,0 @@
-package main
-
-// Max returns the larger of two integers.
-func Max(a, b int) int {
-	if a > b {
-		return a
-	} else {
-		return b
-	}
-}