fix: pasting workaround for windows

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

main.go

@@ -185,6 +185,9 @@ func (session *viewerSession) initUIWithForm() {
 		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_unix.go

@@ -0,0 +1,12 @@
+// +build !windows
+
+package main
+
+import (
+	"github.com/rivo/tview"
+)
+
+// do nothing for non windows
+// remove once https://github.com/gdamore/tcell/issues/319 is fixed
+func (session *viewerSession) enablePaste(field *tview.InputField, form *tview.Form) {
+}

util_windows.go

@@ -0,0 +1,47 @@
+// +build windows
+
+package main
+
+import (
+	"reflect"
+
+	"github.com/atotto/clipboard"
+	"github.com/gdamore/tcell"
+	"github.com/rivo/tview"
+)
+
+// 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) {
+	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()
+}