fix: pasting workaround for windows

adapted from rivo/tview#92
undo once gdamore/tcell#319 is fixed

main.go

@@ -180,11 +180,14 @@ func newSession() (*viewerSession, *os.File, error) {
 func (session *viewerSession) initUIWithForm() {
 
 	form := tview.NewForm().
-		AddInputField("username", session.username, 30, nil, session.updateUsername).
+		AddInputField("email", session.username, 30, nil, session.updateUsername).
 		AddPasswordField("password", "", 30, '*', session.updatePassword).
 		AddButton("test", session.testAuth).
 		AddButton("save", session.closeForm)
 
+	session.enablePaste(form.GetFormItem(0).(*tview.InputField), form)
+	session.enablePaste(form.GetFormItem(1).(*tview.InputField), form)
+
 	formTreeFlex := tview.NewFlex()
 	if !session.cfg.HorizontalLayout {
 		formTreeFlex.SetDirection(tview.FlexRow)

util.go

@@ -5,12 +5,14 @@ import (
 	"fmt"
 	"log"
 	"os/exec"
+	"reflect"
 	"regexp"
 	"runtime"
 	"strconv"
 	"strings"
 	"time"
 
+	"github.com/atotto/clipboard"
 	"github.com/gdamore/tcell"
 	"github.com/rivo/tview"
 )
@@ -193,3 +195,42 @@ func sanitizeFileName(s string) string {
 	s = strings.TrimSpace(s)
 	return s
 }
+
+// Hacky solution for a working copy paste on Windows
+// Breaks encapsulation by accessing a private member using reflect
+// remove once https://github.com/gdamore/tcell/issues/319 is fixed
+func (session *viewerSession) enablePaste(field *tview.InputField, form *tview.Form) {
+	if runtime.GOOS != "windows" {
+		return
+	}
+	field.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyCtrlV || event.Key() == tcell.KeyCtrlY {
+			session.handlePaste(field)
+		}
+		return event
+	})
+
+	// paste on right click
+	field.SetMouseCapture(func(action tview.MouseAction, event *tcell.EventMouse) (tview.MouseAction, *tcell.EventMouse) {
+		item, _ := form.GetFocusedItemIndex()
+
+		if item != -1 && event.Buttons()&tcell.Button2 != 0 && form.GetFormItem(item) == field {
+			session.handlePaste(field)
+		}
+
+		return action, event
+	})
+}
+
+func (session *viewerSession) handlePaste(field *tview.InputField) {
+	clipContent, err := clipboard.ReadAll()
+	if err != nil {
+		session.logError("could not paste: ", err)
+	}
+	val := reflect.ValueOf(*field)
+	cursorPos := val.FieldByName("cursorPos").Int()
+	text := field.GetText()
+	field.SetText(text[0:cursorPos] + clipContent + text[cursorPos:])
+	// TODO: why does Draw() deadlock?
+	session.app.ForceDraw()
+}