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tailscale-android/cmd/tailscale/ui.go

1593 lines
43 KiB
Go

// Copyright (c) 2020 Tailscale Inc & 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 main
import (
"bytes"
"context"
"fmt"
"image"
"image/color"
"math"
"net/netip"
"time"
"gioui.org/f32"
"gioui.org/font/opentype"
"gioui.org/io/pointer"
"gioui.org/io/system"
"gioui.org/layout"
"gioui.org/op"
"gioui.org/op/clip"
"gioui.org/op/paint"
"gioui.org/text"
"gioui.org/unit"
"gioui.org/widget"
"gioui.org/widget/material"
qrcode "github.com/skip2/go-qrcode"
"golang.org/x/exp/shiny/materialdesign/icons"
"tailscale.com/client/tailscale/apitype"
"tailscale.com/ipn"
"tailscale.com/tailcfg"
"tailscale.com/version"
_ "embed"
"eliasnaur.com/font/roboto/robotobold"
"eliasnaur.com/font/roboto/robotoregular"
_ "image/png"
)
type UI struct {
theme *material.Theme
store *stateStore
// root is the scrollable list of the main UI.
root layout.List
// enabled is the switch for enabling or disabling the VPN.
enabled widget.Bool
search widget.Editor
exitLAN widget.Bool
// webSigin is the button for the web-based sign-in flow.
webSignin widget.Clickable
// googleSignin is the button for native Google Sign-in.
googleSignin widget.Clickable
// openExitDialog opens the exit node picker.
openExitDialog widget.Clickable
signinType signinType
setLoginServer bool
loginServer widget.Editor
loginServerSave widget.Clickable
loginServerCancel widget.Clickable
self widget.Clickable
peers []widget.Clickable
// exitDialog is state for the exit node dialog.
exitDialog struct {
show bool
dismiss Dismiss
exits widget.Enum
list layout.List
}
runningExit bool // are we an exit node now?
qr struct {
show bool
op paint.ImageOp
}
intro struct {
list layout.List
start widget.Clickable
show bool
}
menu struct {
open widget.Clickable
dismiss Dismiss
show bool
showHistory []showChange
showDebugMenu bool
useLoginServer widget.Clickable
copy widget.Clickable
reauth widget.Clickable
bug widget.Clickable
beExit widget.Clickable
exits widget.Clickable
about widget.Clickable
logout widget.Clickable
}
// The current pop-up message, if any
message struct {
text string
// t0 is the time when the most recent message appeared.
t0 time.Time
}
shareDialog struct {
show bool
dismiss Dismiss
list layout.List
// peers are the nodes ready to receive files.
targets []shareTarget
loaded bool
error error
}
// aboutDialog is state for the about dialog.
aboutDialog struct {
show bool
dismiss Dismiss
}
// ossLicenses is the button to show the OSS licenses.
ossLicenses widget.Clickable
icons struct {
search *widget.Icon
more *widget.Icon
exitStatus *widget.Icon
done *widget.Icon
error *widget.Icon
logo paint.ImageOp
google paint.ImageOp
}
}
type shareTarget struct {
btn widget.Clickable
target *apitype.FileTarget
info FileSendInfo
cancel func()
updates <-chan FileSendInfo
}
type signinType uint8
// An UIPeer is either a peer or a section header
// with the user information.
type UIPeer struct {
// Owner of the peer.
Owner tailcfg.UserID
// Name is the owner's name in all caps (for section headers).
Name string
// Peer is nil for section headers.
Peer *tailcfg.Node
}
// menuItem describes an item in a popup menu.
type menuItem struct {
title string
btn *widget.Clickable
}
const (
headerColor = 0x496495
infoColor = 0x3a517b
white = 0xffffff
)
const (
keyShowIntro = "ui.showintro"
)
const (
noSignin signinType = iota
webSignin
googleSignin
)
type (
C = layout.Context
D = layout.Dimensions
)
var (
//go:embed tailscale.png
tailscaleLogo []byte
//go:embed google.png
googleLogo []byte
)
func newUI(store *stateStore) (*UI, error) {
searchIcon, err := widget.NewIcon(icons.ActionSearch)
if err != nil {
return nil, err
}
moreIcon, err := widget.NewIcon(icons.NavigationMoreVert)
if err != nil {
return nil, err
}
exitStatus, err := widget.NewIcon(icons.NavigationMenu)
if err != nil {
return nil, err
}
doneIcon, err := widget.NewIcon(icons.ActionCheckCircle)
if err != nil {
return nil, err
}
errorIcon, err := widget.NewIcon(icons.AlertErrorOutline)
if err != nil {
return nil, err
}
logo, _, err := image.Decode(bytes.NewReader(tailscaleLogo))
if err != nil {
return nil, err
}
google, _, err := image.Decode(bytes.NewReader(googleLogo))
if err != nil {
return nil, err
}
face, err := opentype.Parse(robotoregular.TTF)
if err != nil {
panic(fmt.Sprintf("failed to parse font: %v", err))
}
faceBold, err := opentype.Parse(robotobold.TTF)
if err != nil {
panic(fmt.Sprintf("failed to parse font: %v", err))
}
fonts := []text.FontFace{
{Font: text.Font{Typeface: "Roboto"}, Face: face},
{Font: text.Font{Typeface: "Roboto", Weight: text.Bold}, Face: faceBold},
}
ui := &UI{
theme: material.NewTheme(fonts),
store: store,
}
ui.intro.show, _ = store.ReadBool(keyShowIntro, true)
ui.icons.search = searchIcon
ui.icons.more = moreIcon
ui.icons.exitStatus = exitStatus
ui.icons.done = doneIcon
ui.icons.error = errorIcon
ui.icons.logo = paint.NewImageOp(logo)
ui.icons.google = paint.NewImageOp(google)
ui.root.Axis = layout.Vertical
ui.intro.list.Axis = layout.Vertical
ui.search.SingleLine = true
ui.loginServer.SingleLine = true
ui.exitDialog.list.Axis = layout.Vertical
ui.shareDialog.list.Axis = layout.Vertical
// If they've ever set the control plane, give them the debug menu right away.
if v, _ := ui.store.ReadString(customLoginServerPrefKey, ""); v != "" {
ui.menu.showDebugMenu = true
}
return ui, nil
}
func mulAlpha(c color.NRGBA, alpha uint8) color.NRGBA {
c.A = uint8(uint32(c.A) * uint32(alpha) / 0xff)
return c
}
func (ui *UI) onBack() bool {
b := ui.activeDialog()
if b == nil {
return false
}
*b = false
return true
}
func (ui *UI) activeDialog() *bool {
switch {
case ui.qr.show:
return &ui.qr.show
case ui.menu.show:
return &ui.menu.show
case ui.shareDialog.show:
return &ui.shareDialog.show
case ui.exitDialog.show:
return &ui.exitDialog.show
case ui.aboutDialog.show:
return &ui.aboutDialog.show
}
return nil
}
type showChange struct {
at time.Time
shown bool
}
func (ui *UI) setMenuShown(v bool) {
if v == ui.menu.show {
return
}
ui.menu.show = v
now := time.Now()
const recent = 5 * time.Second
recentHistory := ui.menu.showHistory[:0]
for _, hi := range ui.menu.showHistory {
if now.Sub(hi.at) < recent {
recentHistory = append(recentHistory, hi)
}
}
ui.menu.showHistory = append(recentHistory, showChange{
at: now,
shown: v,
})
if len(ui.menu.showHistory) >= 6 {
ui.menu.showDebugMenu = true
}
}
func (ui *UI) layout(gtx layout.Context, sysIns system.Insets, state *clientState) []UIEvent {
// "Get started".
if ui.intro.show {
if ui.intro.start.Clicked() {
ui.store.WriteBool(keyShowIntro, false)
ui.intro.show = false
}
ui.layoutIntro(gtx, sysIns)
return nil
}
var events []UIEvent
if ui.enabled.Changed() {
events = append(events, ConnectEvent{Enable: ui.enabled.Value})
}
for _, e := range ui.search.Events() {
if _, ok := e.(widget.ChangeEvent); ok {
events = append(events, SearchEvent{Query: ui.search.Text()})
break
}
}
for ui.menu.open.Clicked() {
ui.setMenuShown(!ui.menu.show)
}
netmap := state.backend.NetworkMap
var (
localName, localAddr string
expiry time.Time
userID tailcfg.UserID
exitID tailcfg.StableNodeID
)
if netmap != nil {
userID = netmap.User()
expiry = netmap.Expiry
localName = netmap.SelfNode.DisplayName(false)
if addrs := netmap.GetAddresses(); addrs.Len() > 0 {
localAddr = addrs.At(0).Addr().String()
}
}
if p := state.backend.Prefs; p != nil {
exitID = p.ExitNodeID
}
if d := &ui.exitDialog; d.show {
if newID := tailcfg.StableNodeID(d.exits.Value); newID != exitID {
d.show = false
events = append(events, RouteAllEvent{newID})
}
} else {
d.exits.Value = string(exitID)
}
if ui.exitLAN.Changed() {
events = append(events, ExitAllowLANEvent(ui.exitLAN.Value))
}
if ui.googleSignin.Clicked() {
ui.signinType = googleSignin
events = append(events, GoogleAuthEvent{})
}
if ui.webSignin.Clicked() {
ui.signinType = webSignin
events = append(events, WebAuthEvent{})
}
if ui.loginServerSave.Clicked() {
text := ui.loginServer.Text()
ui.showMessage(gtx, "Login server saved")
events = append(events, SetLoginServerEvent{URL: text})
ui.setLoginServer = false
}
if ui.loginServerCancel.Clicked() {
ui.setLoginServer = false
}
if ui.menuClicked(&ui.menu.useLoginServer) {
ui.setLoginServer = true
savedLoginServer, _ := ui.store.ReadString(customLoginServerPrefKey, "")
ui.loginServer.SetText(savedLoginServer)
}
if ui.menuClicked(&ui.menu.copy) && localAddr != "" {
events = append(events, CopyEvent{Text: localAddr})
ui.showCopied(gtx, localAddr)
}
if ui.menuClicked(&ui.menu.reauth) {
events = append(events, ReauthEvent{})
}
if ui.menuClicked(&ui.menu.bug) {
events = append(events, BugEvent{})
ui.showCopied(gtx, "bug report marker to clipboard")
}
if ui.menuClicked(&ui.menu.beExit) {
ui.runningExit = !ui.runningExit
events = append(events, BeExitNodeEvent(ui.runningExit))
if ui.runningExit {
ui.showMessage(gtx, "Running exit node")
} else {
ui.showMessage(gtx, "Stopped running exit node")
}
}
if ui.menuClicked(&ui.menu.exits) || ui.openExitDialog.Clicked() {
ui.exitDialog.show = true
}
if ui.menuClicked(&ui.menu.about) {
ui.aboutDialog.show = true
}
if ui.ossLicenses.Clicked() {
events = append(events, OSSLicensesEvent{})
}
if ui.menuClicked(&ui.menu.logout) {
events = append(events, LogoutEvent{})
}
for i := range ui.shareDialog.targets {
t := &ui.shareDialog.targets[i]
select {
case t.info = <-t.updates:
default:
}
if !t.btn.Clicked() {
continue
}
switch t.info.State {
case FileSendTransferring, FileSendConnecting:
t.cancel()
t.info.State = FileSendNotStarted
t.updates = nil
continue
}
t.info = FileSendInfo{
State: FileSendConnecting,
}
ctx, cancel := context.WithCancel(context.Background())
t.cancel = cancel
updates := make(chan FileSendInfo, 1)
t.updates = updates
events = append(events, FileSendEvent{
Target: t.target,
Context: ctx,
Updates: func(info FileSendInfo) {
select {
case <-updates:
default:
}
updates <- info
},
})
}
for len(ui.peers) < len(state.Peers) {
ui.peers = append(ui.peers, widget.Clickable{})
}
if max := len(state.Peers); len(ui.peers) > max {
ui.peers = ui.peers[:max]
}
const numHeaders = 6
n := numHeaders + len(state.Peers)
needsLogin := state.backend.State == ipn.NeedsLogin
if !needsLogin {
ui.qr.show = false
}
rootGtx := gtx
if ui.activeDialog() != nil {
rootGtx.Queue = nil
}
ui.root.Layout(rootGtx, n, func(gtx C, idx int) D {
var in layout.Inset
if idx == n-1 {
// The last list element includes the bottom system
// inset.
in.Bottom = sysIns.Bottom
}
return in.Layout(gtx, func(gtx C) D {
switch idx {
case 0:
return ui.layoutTop(gtx, sysIns, &state.backend)
case 1:
if netmap == nil || state.backend.State < ipn.Stopped {
return D{}
}
for ui.self.Clicked() {
events = append(events, CopyEvent{Text: localAddr})
ui.showCopied(gtx, localAddr)
}
return ui.layoutLocal(gtx, sysIns, localName, localAddr)
case 2:
return ui.layoutExitStatus(gtx, &state.backend)
case 3:
if state.backend.State < ipn.Stopped {
return D{}
}
return ui.layoutSearchbar(gtx, sysIns)
case 4:
if !needsLogin {
return D{}
}
return ui.layoutSignIn(gtx, &state.backend)
case 5:
// Formerly "No internet connection", which has been removed.
return D{}
default:
if needsLogin {
return D{}
}
pidx := idx - numHeaders
p := &state.Peers[pidx]
if p.Peer == nil {
name := p.Name
if p.Owner == userID {
name = "MY DEVICES"
}
return ui.layoutSection(gtx, sysIns, name)
} else {
clk := &ui.peers[pidx]
if clk.Clicked() {
if addrs := p.Peer.Addresses; len(addrs) > 0 {
a := addrs[0].Addr().String()
events = append(events, CopyEvent{Text: a})
ui.showCopied(gtx, a)
}
}
if p.Peer.Hostinfo.Location() != nil && p.Peer.IsWireGuardOnly {
// If the peer has location information set and is a wireguard
// only peer then it should not be displayed in the main list.
return D{}
}
return ui.layoutPeer(gtx, sysIns, p, userID, clk)
}
}
})
})
ui.layoutExitNodeDialog(gtx, sysIns, state.backend.Exits)
ui.layoutShareDialog(gtx, sysIns)
ui.layoutAboutDialog(gtx, sysIns)
// Popup messages.
ui.layoutMessage(gtx, sysIns)
// 3-dots menu.
if ui.menu.show {
ui.layoutMenu(gtx, sysIns, expiry, exitID != "" || len(state.backend.Exits) > 0, needsLogin)
}
if ui.qr.show {
ui.layoutQR(gtx, sysIns)
}
return events
}
func (ui *UI) layoutQR(gtx layout.Context, sysIns system.Insets) layout.Dimensions {
fill{rgb(0x232323)}.Layout(gtx, gtx.Constraints.Max)
return layout.Center.Layout(gtx, func(gtx C) D {
return drawImage(gtx, ui.qr.op, unit.Dp(300))
})
}
func (ui *UI) FillShareDialog(targets []*apitype.FileTarget, err error) {
ui.shareDialog.error = err
ui.shareDialog.loaded = true
targetSet := make(map[tailcfg.NodeID]int)
if ui.shareDialog.show {
// Update rather than replace list.
for i, t := range ui.shareDialog.targets {
targetSet[t.target.Node.ID] = i
}
} else {
ui.shareDialog.targets = nil
}
for _, t := range targets {
if i, ok := targetSet[t.Node.ID]; ok {
ui.shareDialog.targets[i].target = t
} else {
ui.shareDialog.targets = append(ui.shareDialog.targets, shareTarget{target: t})
}
}
}
func (ui *UI) ShowShareDialog() {
ui.shareDialog.show = true
}
func (ui *UI) ShowMessage(msg string) {
ui.message.text = msg
ui.message.t0 = time.Now()
}
func (ui *UI) ShowQRCode(url string) {
ui.qr.show = true
q, err := qrcode.New(url, qrcode.Medium)
if err != nil {
fatalErr(err)
return
}
ui.qr.op = paint.NewImageOp(q.Image(512))
}
// Dismiss is a widget that detects pointer presses.
type Dismiss struct {
}
func (d *Dismiss) Add(gtx layout.Context, color color.NRGBA) {
defer clip.Rect(image.Rectangle{Max: gtx.Constraints.Min}).Push(gtx.Ops).Pop()
pointer.InputOp{Tag: d, Types: pointer.Press}.Add(gtx.Ops)
paint.Fill(gtx.Ops, color)
}
func (d *Dismiss) Dismissed(gtx layout.Context) bool {
for _, e := range gtx.Events(d) {
if e, ok := e.(pointer.Event); ok {
if e.Type == pointer.Press {
return true
}
}
}
return false
}
func (ui *UI) layoutExitStatus(gtx layout.Context, state *BackendState) layout.Dimensions {
var bg color.NRGBA
var text string
switch state.ExitStatus {
case ExitNone:
return D{}
case ExitOffline:
text = "Exit node offline"
bg = rgb(0xc65835)
case ExitOnline:
text = "Using exit node"
bg = rgb(0x338b51)
}
return material.Clickable(gtx, &ui.openExitDialog, func(gtx C) D {
gtx.Constraints.Min.X = gtx.Constraints.Max.X
return layout.Stack{}.Layout(gtx,
layout.Expanded(func(gtx layout.Context) layout.Dimensions {
sz := image.Point{
X: gtx.Constraints.Min.X,
Y: gtx.Constraints.Min.Y,
}
defer clip.Rect(image.Rectangle{Max: sz}).Push(gtx.Ops).Pop()
paint.ColorOp{Color: bg}.Add(gtx.Ops)
paint.PaintOp{}.Add(gtx.Ops)
return layout.Dimensions{Size: sz}
}),
layout.Stacked(func(gtx layout.Context) layout.Dimensions {
return layout.Inset{
Top: unit.Dp(12),
Bottom: unit.Dp(12),
Right: unit.Dp(24),
Left: unit.Dp(24),
}.Layout(gtx, func(gtx C) D {
return layout.Flex{Alignment: layout.Middle}.Layout(gtx,
layout.Flexed(1, func(gtx C) D {
return layout.Flex{Axis: layout.Vertical}.Layout(gtx,
layout.Rigid(func(gtx C) D {
lbl := material.Body2(ui.theme, text)
lbl.Color = rgb(white)
return lbl.Layout(gtx)
}),
layout.Rigid(func(gtx C) D {
node := material.Body2(ui.theme, state.Exit.Label)
node.Color = argb(0x88ffffff)
return node.Layout(gtx)
}),
)
}),
layout.Rigid(func(gtx C) D {
return ui.icons.exitStatus.Layout(gtx, rgb(white))
}),
)
})
}),
)
})
}
// layoutSignIn lays out the sign in button(s).
func (ui *UI) layoutSignIn(gtx layout.Context, state *BackendState) layout.Dimensions {
return layout.Inset{Top: unit.Dp(48), Left: unit.Dp(48), Right: unit.Dp(48)}.Layout(gtx, func(gtx C) D {
const (
textColor = 0x555555
)
border := widget.Border{Color: rgb(textColor), CornerRadius: unit.Dp(4), Width: unit.Dp(1)}
if ui.setLoginServer {
return layout.Flex{Axis: layout.Vertical, Alignment: layout.Middle}.Layout(gtx,
layout.Rigid(func(gtx C) D {
return layout.Inset{Bottom: unit.Dp(16)}.Layout(gtx, func(gtx C) D {
return Background{Color: rgb(0xe3e2ea), CornerRadius: unit.Dp(8)}.Layout(gtx, func(gtx C) D {
return layout.UniformInset(unit.Dp(8)).Layout(gtx, func(gtx C) D {
return layout.Flex{Alignment: layout.Middle}.Layout(gtx,
layout.Flexed(1,
material.Editor(ui.theme, &ui.loginServer, "https://controlplane.tailscale.com").Layout,
),
)
})
})
})
}),
layout.Rigid(func(gtx C) D {
return layout.Inset{Bottom: unit.Dp(16)}.Layout(gtx, func(gtx C) D {
return border.Layout(gtx, func(gtx C) D {
button := material.Button(ui.theme, &ui.loginServerSave, "Save")
button.Background = color.NRGBA{} // transparent
button.Color = rgb(textColor)
return button.Layout(gtx)
})
})
}),
layout.Rigid(func(gtx C) D {
return border.Layout(gtx, func(gtx C) D {
button := material.Button(ui.theme, &ui.loginServerCancel, "Cancel")
button.Background = color.NRGBA{} // transparent
button.Color = rgb(textColor)
return button.Layout(gtx)
})
}),
)
}
return layout.Flex{Axis: layout.Vertical, Alignment: layout.Middle}.Layout(gtx,
layout.Rigid(func(gtx C) D {
if !googleSignInEnabled() {
return D{}
}
return layout.Inset{Bottom: unit.Dp(16)}.Layout(gtx, func(gtx C) D {
signin := material.ButtonLayout(ui.theme, &ui.googleSignin)
signin.Background = color.NRGBA{} // transparent
return ui.withLoader(gtx, ui.signinType == googleSignin, func(gtx C) D {
return border.Layout(gtx, func(gtx C) D {
if ui.signinType != noSignin {
gtx.Queue = nil
}
return signin.Layout(gtx, func(gtx C) D {
gtx.Constraints.Max.Y = gtx.Dp(unit.Dp(48))
return layout.Flex{Alignment: layout.Middle}.Layout(gtx,
layout.Rigid(func(gtx C) D {
return layout.Inset{Right: unit.Dp(4)}.Layout(gtx, func(gtx C) D {
return drawImage(gtx, ui.icons.google, unit.Dp(16))
})
}),
layout.Rigid(func(gtx C) D {
return layout.Inset{Top: unit.Dp(10), Bottom: unit.Dp(10)}.Layout(gtx, func(gtx C) D {
l := material.Body2(ui.theme, "Sign in with Google")
l.Color = rgb(textColor)
return l.Layout(gtx)
})
}),
)
})
})
})
})
}),
layout.Rigid(func(gtx C) D {
label := "Sign in with other"
if !googleSignInEnabled() {
label = "Sign in"
}
return ui.withLoader(gtx, ui.signinType == webSignin, func(gtx C) D {
return border.Layout(gtx, func(gtx C) D {
if ui.signinType != noSignin {
gtx.Queue = nil
}
signin := material.Button(ui.theme, &ui.webSignin, label)
signin.Background = color.NRGBA{} // transparent
signin.Color = rgb(textColor)
return signin.Layout(gtx)
})
})
}),
)
})
}
func (ui *UI) withLoader(gtx layout.Context, loading bool, w layout.Widget) layout.Dimensions {
cons := gtx.Constraints
return layout.Stack{Alignment: layout.W}.Layout(gtx,
layout.Stacked(func(gtx C) D {
gtx.Constraints = cons
return w(gtx)
}),
layout.Stacked(func(gtx C) D {
if !loading {
return D{}
}
return layout.Inset{Left: unit.Dp(16)}.Layout(gtx, func(gtx C) D {
gtx.Constraints.Min = image.Point{
X: gtx.Dp(unit.Dp(16)),
}
return material.Loader(ui.theme).Layout(gtx)
})
}),
)
}
// layoutIntro lays out the intro page with the logo and terms.
func (ui *UI) layoutIntro(gtx layout.Context, sysIns system.Insets) {
fill{rgb(0x232323)}.Layout(gtx, gtx.Constraints.Max)
ui.intro.list.Layout(gtx, 1, func(gtx C, idx int) D {
return layout.Flex{Axis: layout.Vertical}.Layout(gtx,
// 9 dot logo.
layout.Rigid(func(gtx C) D {
return layout.Inset{Top: unit.Dp(80), Bottom: unit.Dp(48)}.Layout(gtx, func(gtx C) D {
return layout.N.Layout(gtx, func(gtx C) D {
sz := gtx.Dp(unit.Dp(72))
drawLogo(gtx.Ops, sz)
return layout.Dimensions{Size: image.Pt(sz, sz)}
})
})
}),
// "tailscale".
layout.Rigid(func(gtx C) D {
return layout.N.Layout(gtx, func(gtx C) D {
return drawImage(gtx, ui.icons.logo, unit.Dp(200))
})
}),
// Terms.
layout.Rigid(func(gtx C) D {
return layout.Inset{
Top: unit.Dp(48),
Left: unit.Dp(32),
Right: unit.Dp(32),
}.Layout(gtx, func(gtx C) D {
terms := material.Body2(ui.theme, termsText)
terms.Color = rgb(0xbfbfbf)
terms.Alignment = text.Middle
return terms.Layout(gtx)
})
}),
// "Get started".
layout.Rigid(func(gtx C) D {
return layout.Inset{
Top: unit.Dp(16),
Left: unit.Dp(16),
Right: unit.Dp(16),
Bottom: sysIns.Bottom,
}.Layout(gtx, func(gtx C) D {
start := material.Button(ui.theme, &ui.intro.start, "Get Started")
start.Inset = layout.UniformInset(unit.Dp(16))
start.CornerRadius = unit.Dp(16)
start.Background = rgb(0x496495)
start.TextSize = unit.Sp(20)
return start.Layout(gtx)
})
}),
)
})
}
// menuClicked is like btn.Clicked, but also closes the menu if true.
func (ui *UI) menuClicked(btn *widget.Clickable) bool {
cl := btn.Clicked()
if cl {
ui.setMenuShown(false)
}
return cl
}
// layoutShareDialog lays out the file sharing dialog shown on file send intents (ACTION_SEND, ACTION_SEND_MULTIPLE).
func (ui *UI) layoutShareDialog(gtx layout.Context, sysIns system.Insets) {
d := &ui.shareDialog
if d.dismiss.Dismissed(gtx) {
ui.shareDialog.show = false
}
if !d.show {
return
}
d.dismiss.Add(gtx, argb(0x66000000))
layout.Inset{
Top: sysIns.Top + unit.Dp(16),
Right: sysIns.Right + unit.Dp(16),
Bottom: sysIns.Bottom + unit.Dp(16),
Left: sysIns.Left + unit.Dp(16),
}.Layout(gtx, func(gtx C) D {
return layout.Center.Layout(gtx, func(gtx C) D {
gtx.Constraints.Min.X = gtx.Dp(unit.Dp(250))
gtx.Constraints.Max.X = gtx.Constraints.Min.X
return layoutDialog(gtx, func(gtx C) D {
return layout.Flex{Axis: layout.Vertical}.Layout(gtx,
layout.Rigid(func(gtx C) D {
// Header.
d := layout.Inset{
Top: unit.Dp(16),
Right: unit.Dp(20),
Left: unit.Dp(20),
Bottom: unit.Dp(16),
}.Layout(gtx, func(gtx C) D {
l := material.Body1(ui.theme, "Share via Tailscale")
l.Font.Weight = text.Bold
return l.Layout(gtx)
})
// Swallow clicks to title.
var c widget.Clickable
gtx.Queue = nil
return c.Layout(gtx, func(gtx C) D { return d })
}),
layout.Rigid(func(gtx C) D {
if d.loaded {
return D{}
}
return layout.UniformInset(unit.Dp(50)).Layout(gtx, func(gtx C) D {
return layout.Center.Layout(gtx, func(gtx C) D {
sz := gtx.Dp(unit.Dp(32))
gtx.Constraints.Min = image.Pt(sz, sz)
gtx.Constraints.Max = gtx.Constraints.Min
return material.Loader(ui.theme).Layout(gtx)
})
})
}),
layout.Rigid(func(gtx C) D {
if d.error == nil {
return D{}
}
sz := gtx.Dp(unit.Dp(50))
gtx.Constraints.Min.Y = sz
return layout.UniformInset(unit.Dp(20)).Layout(gtx, func(gtx C) D {
return layout.W.Layout(gtx, func(gtx C) D {
return material.Body2(ui.theme, d.error.Error()).Layout(gtx)
})
})
}),
layout.Flexed(1, func(gtx C) D {
gtx.Constraints.Min.Y = 0
return d.list.Layout(gtx, len(d.targets), func(gtx C, idx int) D {
node := &d.targets[idx]
target := node.target.Node
lbl := target.ComputedName
offline := target.Online != nil && !*target.Online
if offline {
lbl = lbl + " (offline)"
}
w := material.Body2(ui.theme, lbl)
if offline {
w.Color = rgb(0xbbbbbb)
gtx.Queue = nil
}
return material.Clickable(gtx, &node.btn, func(gtx C) D {
return layout.UniformInset(unit.Dp(16)).Layout(gtx, func(gtx C) D {
return layout.Flex{Alignment: layout.Middle}.Layout(gtx,
layout.Flexed(1, w.Layout),
layout.Rigid(func(gtx C) D {
sz := gtx.Dp(unit.Dp(16))
gtx.Constraints.Min = image.Pt(sz, sz)
switch node.info.State {
case FileSendConnecting:
return material.Loader(ui.theme).Layout(gtx)
case FileSendTransferring:
return material.ProgressCircle(ui.theme, float32(node.info.Progress)).Layout(gtx)
case FileSendFailed:
return ui.icons.error.Layout(gtx, rgb(0xcc6539))
case FileSendComplete:
return ui.icons.done.Layout(gtx, ui.theme.Palette.ContrastBg)
default:
return D{}
}
}),
)
})
})
})
}),
)
})
})
})
}
// layoutExitNodeDialog lays out the exit node selection dialog.
func (ui *UI) layoutExitNodeDialog(gtx layout.Context, sysIns system.Insets, exits []Peer) {
d := &ui.exitDialog
if d.dismiss.Dismissed(gtx) {
d.show = false
}
if !d.show {
return
}
d.dismiss.Add(gtx, argb(0x66000000))
layout.Inset{
Top: sysIns.Top + unit.Dp(16),
Right: sysIns.Right + unit.Dp(16),
Bottom: sysIns.Bottom + unit.Dp(16),
Left: sysIns.Left + unit.Dp(16),
}.Layout(gtx, func(gtx C) D {
return layout.Center.Layout(gtx, func(gtx C) D {
gtx.Constraints.Min.X = gtx.Dp(unit.Dp(250))
gtx.Constraints.Max.X = gtx.Constraints.Min.X
return layoutDialog(gtx, func(gtx C) D {
return layout.Flex{Axis: layout.Vertical}.Layout(gtx,
layout.Rigid(func(gtx C) D {
// Header.
return layout.Inset{
Top: unit.Dp(16),
Right: unit.Dp(20),
Left: unit.Dp(20),
Bottom: unit.Dp(16),
}.Layout(gtx, func(gtx C) D {
l := material.Body1(ui.theme, "Use exit node...")
l.Font.Weight = text.Bold
return l.Layout(gtx)
})
}),
layout.Flexed(1, func(gtx C) D {
gtx.Constraints.Min.Y = 0
// Add "none" exit node, then "Allow LAN" checkbox, then the exit nodes.
n := len(exits) + 2
return d.list.Layout(gtx, n, func(gtx C, idx int) D {
if idx == 0 {
btn := material.CheckBox(ui.theme, &ui.exitLAN, "Allow LAN access")
return layout.Inset{
Right: unit.Dp(16),
Left: unit.Dp(16),
Bottom: unit.Dp(16),
}.Layout(gtx, btn.Layout)
}
node := Peer{Label: "None", Online: true, Location: nil}
if idx >= 2 {
node = exits[idx-2]
}
lbl := node.Label
if !node.Online {
lbl = lbl + " (offline)"
}
btn := material.RadioButton(ui.theme, &d.exits, string(node.ID), lbl)
if !node.Online {
btn.Color = rgb(0xbbbbbb)
btn.IconColor = btn.Color
}
return layout.Inset{
Right: unit.Dp(16),
Left: unit.Dp(16),
Bottom: unit.Dp(16),
}.Layout(gtx, btn.Layout)
})
}),
)
})
})
})
}
// layoutAboutDialog lays out the about dialog.
func (ui *UI) layoutAboutDialog(gtx layout.Context, sysIns system.Insets) {
d := &ui.aboutDialog
if d.dismiss.Dismissed(gtx) {
d.show = false
}
if !d.show {
return
}
d.dismiss.Add(gtx, argb(0x66000000))
layout.Inset{
Top: sysIns.Top + unit.Dp(16),
Right: sysIns.Right + unit.Dp(16),
Bottom: sysIns.Bottom + unit.Dp(16),
Left: sysIns.Left + unit.Dp(16),
}.Layout(gtx, func(gtx C) D {
return layout.Center.Layout(gtx, func(gtx C) D {
gtx.Constraints.Min.X = gtx.Dp(unit.Dp(250))
gtx.Constraints.Max.X = gtx.Constraints.Min.X
return layoutDialog(gtx, func(gtx C) D {
return layout.Flex{Axis: layout.Vertical}.Layout(gtx,
layout.Rigid(func(gtx C) D {
// Header.
return layout.Inset{
Top: unit.Dp(16),
Right: unit.Dp(20),
Left: unit.Dp(20),
Bottom: unit.Dp(16),
}.Layout(gtx, func(gtx C) D {
l := material.Body1(ui.theme, "About")
l.Font.Weight = text.Bold
return l.Layout(gtx)
})
}),
layout.Rigid(func(gtx C) D {
return layout.UniformInset(unit.Dp(16)).Layout(gtx, func(gtx C) D {
return material.Body1(ui.theme, "version "+version.Short()).Layout(gtx)
})
}),
layout.Rigid(func(gtx C) D {
return material.Clickable(gtx, &ui.ossLicenses, func(gtx C) D {
return layout.UniformInset(unit.Dp(16)).Layout(gtx, func(gtx C) D {
return material.Body1(ui.theme, "Open Source Licenses").Layout(gtx)
})
})
}),
)
})
})
})
}
func layoutMenu(th *material.Theme, gtx layout.Context, items []menuItem, header layout.Widget) layout.Dimensions {
return layoutDialog(gtx, func(gtx C) D {
// Lay out menu items twice; once for
// measuring the widest item, once for actual layout.
var maxWidth int
var minWidth int
children := []layout.FlexChild{
layout.Rigid(func(gtx C) D {
return layout.Inset{
Top: unit.Dp(16),
Right: unit.Dp(16),
Left: unit.Dp(16),
Bottom: unit.Dp(4),
}.Layout(gtx, func(gtx C) D {
gtx.Constraints.Min.X = minWidth
dims := header(gtx)
if w := dims.Size.X; w > maxWidth {
maxWidth = w
}
return dims
})
}),
}
for i := 0; i < len(items); i++ {
it := &items[i]
children = append(children, layout.Rigid(func(gtx C) D {
return material.Clickable(gtx, it.btn, func(gtx C) D {
return layout.UniformInset(unit.Dp(16)).Layout(gtx, func(gtx C) D {
gtx.Constraints.Min.X = minWidth
dims := material.Body1(th, it.title).Layout(gtx)
if w := dims.Size.X; w > maxWidth {
maxWidth = w
}
return dims
})
})
}))
}
f := layout.Flex{Axis: layout.Vertical}
// First pass: record and discard operations
// and determine widest item.
m := op.Record(gtx.Ops)
f.Layout(gtx, children...)
m.Stop()
// Second pass: layout items with equal width.
minWidth = maxWidth
return f.Layout(gtx, children...)
})
}
func layoutDialog(gtx layout.Context, w layout.Widget) layout.Dimensions {
return widget.Border{Color: argb(0x33000000), CornerRadius: unit.Dp(2), Width: unit.Dp(1)}.Layout(gtx, func(gtx C) D {
return Background{Color: rgb(0xfafafa), CornerRadius: unit.Dp(2)}.Layout(gtx, w)
})
}
// layoutMenu lays out the menu activated by the 3 dots button.
func (ui *UI) layoutMenu(gtx layout.Context, sysIns system.Insets, expiry time.Time, showExits bool, needsLogin bool) {
ui.menu.dismiss.Add(gtx, color.NRGBA{})
if ui.menu.dismiss.Dismissed(gtx) {
ui.setMenuShown(false)
}
layout.Inset{
Top: sysIns.Top + unit.Dp(2),
Right: sysIns.Right + unit.Dp(2),
}.Layout(gtx, func(gtx C) D {
return layout.NE.Layout(gtx, func(gtx C) D {
menu := &ui.menu
if ui.setLoginServer {
return D{}
}
if needsLogin {
var items []menuItem
title := "Tailscale " + version.Short()
if ui.menu.showDebugMenu {
items = append(items, menuItem{title: "Change server", btn: &menu.useLoginServer})
}
items = append(items, menuItem{title: "About", btn: &menu.about})
return layoutMenu(ui.theme, gtx, items, func(gtx C) D {
l := material.Caption(ui.theme, title)
return l.Layout(gtx)
})
}
items := []menuItem{
{title: "Copy my IP address", btn: &menu.copy},
}
if showExits {
items = append(items, menuItem{title: "Use exit node...", btn: &menu.exits})
}
items = append(items,
menuItem{title: "Bug report", btn: &menu.bug},
menuItem{title: "Reauthenticate", btn: &menu.reauth},
menuItem{title: "Log out", btn: &menu.logout},
)
var title string
if ui.runningExit {
title = "Stop running exit node"
} else {
title = "Run exit node"
}
items = append(items, menuItem{title: title, btn: &menu.beExit})
items = append(items, menuItem{title: "About", btn: &menu.about})
return layoutMenu(ui.theme, gtx, items, func(gtx C) D {
var expiryStr string
const fmtStr = time.Stamp
switch {
case expiry.IsZero():
expiryStr = "Expires: (never)"
case time.Now().After(expiry):
expiryStr = fmt.Sprintf("Expired: %s", expiry.Format(fmtStr))
default:
expiryStr = fmt.Sprintf("Expires: %s", expiry.Format(fmtStr))
}
l := material.Caption(ui.theme, expiryStr)
l.Color = rgb(0x8f8f8f)
return l.Layout(gtx)
})
})
})
}
func (ui *UI) layoutMessage(gtx layout.Context, sysIns system.Insets) layout.Dimensions {
s := ui.message.text
if s == "" {
return D{}
}
now := gtx.Now
d := now.Sub(ui.message.t0)
rem := 4*time.Second - d
if rem < 0 {
return D{}
}
op.InvalidateOp{At: now.Add(rem)}.Add(gtx.Ops)
return layout.S.Layout(gtx, func(gtx C) D {
return layout.Inset{
Left: sysIns.Left + unit.Dp(8),
Right: sysIns.Right + unit.Dp(8),
Bottom: sysIns.Bottom + unit.Dp(8),
}.Layout(gtx, func(gtx C) D {
return Background{Color: rgb(0x323232), CornerRadius: unit.Dp(5)}.Layout(gtx, func(gtx C) D {
return layout.UniformInset(unit.Dp(12)).Layout(gtx, func(gtx C) D {
l := material.Body2(ui.theme, s)
l.Color = rgb(0xdddddd)
return l.Layout(gtx)
})
})
})
})
}
func (ui *UI) showMessage(gtx layout.Context, msg string) {
ui.message.text = msg
ui.message.t0 = gtx.Now
op.InvalidateOp{}.Add(gtx.Ops)
}
func MaxDp(p1, p2 unit.Dp) unit.Dp {
if p1 > p2 {
return p1
}
return p2
}
// layoutPeer lays out a peer name and IP address (e.g.
// "localhost\n100.100.100.101")
func (ui *UI) layoutPeer(gtx layout.Context, sysIns system.Insets, p *UIPeer, user tailcfg.UserID, clk *widget.Clickable) layout.Dimensions {
return material.Clickable(gtx, clk, func(gtx C) D {
return layout.Inset{
Top: unit.Dp(8),
Right: MaxDp(sysIns.Right, unit.Dp(16)),
Left: MaxDp(sysIns.Left, unit.Dp(16)),
Bottom: unit.Dp(8),
}.Layout(gtx, func(gtx C) D {
gtx.Constraints.Min.X = gtx.Constraints.Max.X
return layout.Flex{Axis: layout.Vertical}.Layout(gtx,
layout.Rigid(func(gtx C) D {
return layout.Inset{Bottom: unit.Dp(4)}.Layout(gtx, func(gtx C) D {
name := p.Peer.DisplayName(p.Peer.User == user)
return material.H6(ui.theme, name).Layout(gtx)
})
}),
layout.Rigid(func(gtx C) D {
var bestIP netip.Addr // IP to show; first IPv4, or first IPv6 if no IPv4
for _, addr := range p.Peer.Addresses {
if ip := addr.Addr(); !bestIP.IsValid() || bestIP.Is6() && ip.Is4() {
bestIP = ip
}
}
l := material.Body2(ui.theme, bestIP.String())
l.Color = rgb(0x434343)
return l.Layout(gtx)
}),
)
})
})
}
// layoutSection lays out a section title (e.g. "My devices").
func (ui *UI) layoutSection(gtx layout.Context, sysIns system.Insets, title string) layout.Dimensions {
return Background{Color: rgb(0xe1e0e9)}.Layout(gtx, func(gtx C) D {
return layout.Inset{
Top: unit.Dp(16),
Right: MaxDp(sysIns.Right, unit.Dp(16)),
Left: MaxDp(sysIns.Left, unit.Dp(16)),
Bottom: unit.Dp(16),
}.Layout(gtx, func(gtx C) D {
l := material.Body1(ui.theme, title)
l.Color = rgb(0x6f797d)
return l.Layout(gtx)
})
})
}
// layoutTop lays out the top controls: toggle, status and menu dots.
func (ui *UI) layoutTop(gtx layout.Context, sysIns system.Insets, state *BackendState) layout.Dimensions {
in := layout.Inset{
Top: unit.Dp(16),
Bottom: unit.Dp(16),
}
return Background{Color: rgb(headerColor)}.Layout(gtx, func(gtx C) D {
return layout.Inset{
Top: sysIns.Top,
Right: MaxDp(sysIns.Right, unit.Dp(8)),
Left: MaxDp(sysIns.Left, unit.Dp(16)),
}.Layout(gtx, func(gtx C) D {
return layout.Flex{Alignment: layout.Middle}.Layout(gtx,
layout.Rigid(func(gtx C) D {
return in.Layout(gtx, func(gtx C) D {
if state.State <= ipn.NeedsLogin {
return D{}
}
sw := material.Switch(ui.theme, &ui.enabled, "Enable VPN")
sw.Color.Enabled = rgb(white)
if state.State < ipn.Stopped {
sw.Color.Enabled = rgb(0xbbbbbb)
sw.Color.Disabled = rgb(0xbbbbbb)
}
return sw.Layout(gtx)
})
}),
layout.Flexed(1, func(gtx C) D {
return in.Layout(gtx, func(gtx C) D {
return layout.Inset{Left: unit.Dp(16)}.Layout(gtx, func(gtx C) D {
lbl := material.Body1(ui.theme, statusString(state.State))
lbl.Color = rgb(0xffffff)
return lbl.Layout(gtx)
})
})
}),
layout.Rigid(func(gtx C) D {
btn := material.IconButton(ui.theme, &ui.menu.open, ui.icons.more, "Open menu")
btn.Color = rgb(white)
btn.Background = color.NRGBA{}
return btn.Layout(gtx)
}),
)
})
})
}
func statusString(state ipn.State) string {
switch state {
case ipn.Stopped:
return "Stopped"
case ipn.Starting:
return "Starting..."
case ipn.Running:
return "Active"
case ipn.NeedsMachineAuth:
return "Awaiting Approval"
case ipn.NeedsLogin:
return "Tailscale"
default:
return "Loading..."
}
}
func (ui *UI) showCopied(gtx layout.Context, addr string) {
ui.showMessage(gtx, fmt.Sprintf("Copied %s", addr))
}
// layoutLocal lays out the information box about the local node's
// name and IP address.
func (ui *UI) layoutLocal(gtx layout.Context, sysIns system.Insets, host, addr string) layout.Dimensions {
return Background{Color: rgb(headerColor)}.Layout(gtx, func(gtx C) D {
return layout.Inset{
Right: MaxDp(sysIns.Right, unit.Dp(8)),
Left: MaxDp(sysIns.Left, unit.Dp(8)),
Bottom: unit.Dp(8),
}.Layout(gtx, func(gtx C) D {
return Background{Color: rgb(infoColor), CornerRadius: unit.Dp(8)}.Layout(gtx, func(gtx C) D {
return material.Clickable(gtx, &ui.self, func(gtx C) D {
return layout.UniformInset(unit.Dp(16)).Layout(gtx, func(gtx C) D {
gtx.Constraints.Min.X = gtx.Constraints.Max.X
return layout.Flex{Axis: layout.Vertical}.Layout(gtx,
layout.Rigid(func(gtx C) D {
return layout.Inset{Bottom: unit.Dp(4)}.Layout(gtx, func(gtx C) D {
name := material.H6(ui.theme, host)
name.Color = rgb(0xffffff)
return name.Layout(gtx)
})
}),
layout.Rigid(func(gtx C) D {
name := material.Body2(ui.theme, addr)
name.Color = rgb(0xc5ccd9)
return name.Layout(gtx)
}),
)
})
})
})
})
})
}
func (ui *UI) layoutSearchbar(gtx layout.Context, sysIns system.Insets) layout.Dimensions {
return Background{Color: rgb(0xf0eff6)}.Layout(gtx, func(gtx C) D {
return layout.Inset{
Top: unit.Dp(8),
Right: MaxDp(sysIns.Right, unit.Dp(8)),
Left: MaxDp(sysIns.Left, unit.Dp(8)),
Bottom: unit.Dp(8),
}.Layout(gtx, func(gtx C) D {
return Background{Color: rgb(0xe3e2ea), CornerRadius: unit.Dp(8)}.Layout(gtx, func(gtx C) D {
return layout.UniformInset(unit.Dp(8)).Layout(gtx, func(gtx C) D {
return layout.Flex{Alignment: layout.Middle}.Layout(gtx,
layout.Rigid(func(gtx C) D {
col := mulAlpha(ui.theme.Palette.Fg, 0xbb)
return ui.icons.search.Layout(gtx, col)
}),
layout.Flexed(1,
material.Editor(ui.theme, &ui.search, "Search by machine name...").Layout,
),
)
})
})
})
})
}
// drawLogo draws the Tailscale logo using vector operations.
func drawLogo(ops *op.Ops, size int) {
scale := float64(size) / 680
discDia := float32(170 * scale)
off := int(math.Round(172 * 1.5 * scale))
tx := op.Offset(image.Pt(off, 0))
ty := op.Offset(image.Pt(0, off))
defer op.Offset(image.Point{}).Push(ops).Pop()
// First row of discs.
row := op.Offset(image.Point{}).Push(ops)
drawDisc(ops, discDia, rgb(0x54514d))
tx.Add(ops)
drawDisc(ops, discDia, rgb(0x54514d))
tx.Add(ops)
drawDisc(ops, discDia, rgb(0x54514d))
row.Pop()
ty.Add(ops)
// Second row.
row = op.Offset(image.Point{}).Push(ops)
drawDisc(ops, discDia, rgb(0xfffdfa))
tx.Add(ops)
drawDisc(ops, discDia, rgb(0xfffdfa))
tx.Add(ops)
drawDisc(ops, discDia, rgb(0xfffdfa))
row.Pop()
ty.Add(ops)
// Third row.
row = op.Offset(image.Point{}).Push(ops)
drawDisc(ops, discDia, rgb(0xfffdfa))
drawDisc(ops, discDia, rgb(0x54514d))
tx.Add(ops)
drawDisc(ops, discDia, rgb(0xfffdfa))
tx.Add(ops)
drawDisc(ops, discDia, rgb(0x54514d))
row.Pop()
}
func drawImage(gtx layout.Context, img paint.ImageOp, size unit.Dp) layout.Dimensions {
img.Add(gtx.Ops)
sz := img.Size()
aspect := float32(sz.Y) / float32(sz.X)
w := gtx.Dp(size)
h := int(float32(w)*aspect + .5)
scale := float32(w) / float32(sz.X)
defer op.Affine(f32.Affine2D{}.Scale(f32.Point{}, f32.Point{X: scale, Y: scale})).Push(gtx.Ops).Pop()
paint.PaintOp{}.Add(gtx.Ops)
return layout.Dimensions{Size: image.Pt(w, h)}
}
func drawDisc(ops *op.Ops, radius float32, col color.NRGBA) {
r := int(math.Round(float64(radius)))
r2 := int(math.Round(float64(radius * .5)))
defer clip.RRect{
Rect: image.Rect(0, 0, r, r),
NE: r2, NW: r2, SE: r2, SW: r2,
}.Push(ops).Pop()
paint.ColorOp{Color: col}.Add(ops)
paint.PaintOp{}.Add(ops)
}
// Background lays out a widget and draws a color background behind it.
type Background struct {
Color color.NRGBA
CornerRadius unit.Dp
}
func (b Background) Layout(gtx layout.Context, w layout.Widget) layout.Dimensions {
m := op.Record(gtx.Ops)
dims := w(gtx)
sz := dims.Size
call := m.Stop()
// Clip corners, if any.
if r := gtx.Dp(b.CornerRadius); r > 0 {
defer clip.RRect{
Rect: image.Rect(0, 0, sz.X, sz.Y),
NE: r, NW: r, SE: r, SW: r,
}.Push(gtx.Ops).Pop()
}
fill{b.Color}.Layout(gtx, sz)
call.Add(gtx.Ops)
return dims
}
type fill struct {
col color.NRGBA
}
func (f fill) Layout(gtx layout.Context, sz image.Point) layout.Dimensions {
defer clip.Rect(image.Rectangle{Max: sz}).Push(gtx.Ops).Pop()
paint.ColorOp{Color: f.col}.Add(gtx.Ops)
paint.PaintOp{}.Add(gtx.Ops)
return layout.Dimensions{Size: sz}
}
func rgb(c uint32) color.NRGBA {
return argb((0xff << 24) | c)
}
func argb(c uint32) color.NRGBA {
return color.NRGBA{A: uint8(c >> 24), R: uint8(c >> 16), G: uint8(c >> 8), B: uint8(c)}
}
const termsText = `Tailscale is a mesh VPN for securely connecting your devices. All connections are device-to-device, so we never see your data.
We collect and use your email address and name, as well as your device name, OS version, and IP address in order to help you to connect your devices and manage your settings. We log when you are connected to your network.`