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tailscale-android/cmd/tailscale/ui.go

928 lines
25 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"
"fmt"
"image"
"image/color"
"strings"
"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"
"golang.org/x/exp/shiny/materialdesign/icons"
"tailscale.com/ipn"
"tailscale.com/tailcfg"
"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
// 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
signinType signinType
self widget.Clickable
peers []widget.Clickable
intro struct {
list layout.List
start widget.Clickable
show bool
}
menu struct {
open widget.Clickable
dismiss Dismiss
show bool
copy widget.Clickable
reauth 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
}
icons struct {
search *widget.Icon
more *widget.Icon
logo paint.ImageOp
google paint.ImageOp
}
events []UIEvent
}
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
}
const (
headerColor = 0x496495
infoColor = 0x3a517b
white = 0xffffff
)
const (
keyShowIntro = "ui.showintro"
)
const (
noSignin signinType = iota
webSignin
googleSignin
)
type (
C = layout.Context
D = layout.Dimensions
)
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
}
logoData, err := tailscalePngBytes()
if err != nil {
return nil, err
}
logo, _, err := image.Decode(bytes.NewReader(logoData))
if err != nil {
return nil, err
}
googleData, err := googlePngBytes()
if err != nil {
return nil, err
}
google, _, err := image.Decode(bytes.NewReader(googleData))
if err != nil {
return nil, err
}
face, err := opentype.Parse(robotoregular.TTF)
if err != nil {
panic(fmt.Sprintf("failed to parse font: %v", err))
}
fonts := []text.FontFace{{Font: text.Font{Typeface: "Roboto"}, Face: face}}
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.logo = paint.NewImageOp(logo)
ui.icons.google = paint.NewImageOp(google)
ui.icons.more.Color = rgb(white)
ui.icons.search.Color = ui.theme.Color.Hint
ui.root.Axis = layout.Vertical
ui.intro.list.Axis = layout.Vertical
ui.search.SingleLine = true
return ui, nil
}
func (ui *UI) onBack() bool {
if !ui.menu.show {
return false
}
ui.menu.show = false
return true
}
func (ui *UI) layout(gtx layout.Context, sysIns system.Insets, state *clientState) []UIEvent {
ui.events = nil
if ui.enabled.Changed() {
ui.events = append(ui.events, ConnectEvent{Enable: ui.enabled.Value})
}
for _, e := range ui.search.Events() {
if _, ok := e.(widget.ChangeEvent); ok {
ui.events = append(ui.events, SearchEvent{Query: ui.search.Text()})
break
}
}
for ui.menu.open.Clicked() {
ui.menu.show = !ui.menu.show
}
netmap := state.backend.NetworkMap
var localName, localAddr string
var expiry time.Time
if netmap != nil {
expiry = netmap.Expiry
localName = netmap.Hostinfo.Hostname
if addrs := netmap.Addresses; len(addrs) > 0 {
localAddr = addrs[0].IP.String()
}
}
if ui.googleSignin.Clicked() {
ui.signinType = googleSignin
ui.events = append(ui.events, GoogleAuthEvent{})
}
if ui.webSignin.Clicked() {
ui.signinType = webSignin
ui.events = append(ui.events, WebAuthEvent{})
}
if ui.menuClicked(&ui.menu.copy) && localAddr != "" {
ui.copyAddress(gtx, localAddr)
}
if ui.menuClicked(&ui.menu.reauth) {
ui.events = append(ui.events, ReauthEvent{})
}
if ui.menuClicked(&ui.menu.logout) {
ui.events = append(ui.events, LogoutEvent{})
}
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 = 5
n := numHeaders + len(state.Peers)
needsLogin := state.backend.State == ipn.NeedsLogin
ui.root.Layout(gtx, 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{}
}
return ui.layoutLocal(gtx, sysIns, localName, localAddr)
case 2:
if state.backend.State < ipn.Stopped {
return D{}
}
return ui.layoutSearchbar(gtx, sysIns)
case 3:
if !needsLogin || state.backend.LostInternet {
return D{}
}
return ui.layoutSignIn(gtx, &state.backend)
case 4:
if !state.backend.LostInternet {
return D{}
}
return ui.layoutDisconnected(gtx)
default:
if needsLogin {
return D{}
}
pidx := idx - numHeaders
p := &state.Peers[pidx]
if p.Peer == nil {
name := p.Name
if p.Owner == netmap.User {
name = "MY DEVICES"
}
return ui.layoutSection(gtx, sysIns, name)
} else {
clk := &ui.peers[pidx]
return ui.layoutPeer(gtx, sysIns, p, clk)
}
}
})
})
// Popup messages.
ui.layoutMessage(gtx, sysIns)
// 3-dots menu.
if ui.menu.show {
ui.layoutMenu(gtx, sysIns, expiry)
}
// "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 ui.events
}
func (ui *UI) ShowMessage(msg string) {
ui.message.text = msg
ui.message.t0 = time.Now()
}
// Dismiss is a widget that detects pointer presses.
type Dismiss struct {
}
func (d *Dismiss) Add(gtx layout.Context) {
defer op.Push(gtx.Ops).Pop()
pointer.Rect(image.Rectangle{Max: gtx.Constraints.Min}).Add(gtx.Ops)
pointer.InputOp{Tag: d, Types: pointer.Press}.Add(gtx.Ops)
}
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
}
// 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.Px(1)}
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.Px(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.Px(unit.Dp(16)),
}
return material.Loader(ui.theme).Layout(gtx)
})
}),
)
}
// layoutDisconnected lays out the "please connect to the internet"
// message.
func (ui *UI) layoutDisconnected(gtx layout.Context) layout.Dimensions {
return layout.UniformInset(unit.Dp(16)).Layout(gtx, func(gtx C) D {
return layout.Flex{Axis: layout.Vertical}.Layout(gtx,
layout.Rigid(func(gtx C) D {
return layout.Inset{Top: unit.Dp(8)}.Layout(gtx, func(gtx C) D {
title := material.H6(ui.theme, "No internet connection")
title.Alignment = text.Middle
return title.Layout(gtx)
})
}),
layout.Rigid(func(gtx C) D {
return layout.Inset{Top: unit.Dp(8)}.Layout(gtx, func(gtx C) D {
msg := material.Body2(ui.theme, "Tailscale is paused while your device is offline. Please reconnect to the internet.")
msg.Alignment = text.Middle
return msg.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.Px(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: unit.Add(gtx.Metric, 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.menu.show = false
}
return cl
}
// layoutMenu lays out the menu activated by the 3 dots button.
func (ui *UI) layoutMenu(gtx layout.Context, sysIns system.Insets, expiry time.Time) {
ui.menu.dismiss.Add(gtx)
if ui.menu.dismiss.Dismissed(gtx) {
ui.menu.show = false
}
layout.Inset{
Top: unit.Add(gtx.Metric, sysIns.Top, unit.Dp(2)),
Right: unit.Add(gtx.Metric, sysIns.Right, unit.Dp(2)),
}.Layout(gtx, func(gtx C) D {
return layout.NE.Layout(gtx, func(gtx C) D {
return widget.Border{Color: argb(0x33000000), CornerRadius: unit.Dp(2), Width: unit.Px(1)}.Layout(gtx, func(gtx C) D {
return Background{Color: rgb(0xfafafa), CornerRadius: unit.Dp(2)}.Layout(gtx, func(gtx C) D {
menu := &ui.menu
items := []struct {
btn *widget.Clickable
title string
}{
{title: "Copy My IP Address", btn: &menu.copy},
{title: "Reauthenticate", btn: &menu.reauth},
{title: "Log out", btn: &menu.logout},
}
// 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
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)
dims := l.Layout(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(ui.theme, 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 (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{Bottom: unit.Add(gtx.Metric, 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)
}
// 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, clk *widget.Clickable) layout.Dimensions {
for clk.Clicked() {
if addrs := p.Peer.Addresses; len(addrs) > 0 {
ui.copyAddress(gtx, addrs[0].IP.String())
}
}
return material.Clickable(gtx, clk, func(gtx C) D {
return layout.Inset{
Top: unit.Dp(8),
Right: unit.Max(gtx.Metric, sysIns.Right, unit.Dp(16)),
Left: unit.Max(gtx.Metric, 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.Hostinfo.Hostname
if name == "" {
name = p.Peer.ID.String()
}
return material.H6(ui.theme, name).Layout(gtx)
})
}),
layout.Rigid(func(gtx C) D {
var addrs []string
for _, addr := range p.Peer.Addresses {
addrs = append(addrs, addr.IP.String())
}
l := material.Body2(ui.theme, strings.Join(addrs, ","))
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: unit.Max(gtx.Metric, sysIns.Right, unit.Dp(16)),
Left: unit.Max(gtx.Metric, 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: unit.Max(gtx.Metric, sysIns.Right, unit.Dp(8)),
Left: unit.Max(gtx.Metric, 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)
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 {
if state.State <= ipn.NeedsLogin {
return D{}
}
return material.Clickable(gtx, &ui.menu.open, func(gtx C) D {
return layout.UniformInset(unit.Dp(8)).Layout(gtx, func(gtx C) D {
return ui.icons.more.Layout(gtx, unit.Dp(24))
})
})
}),
)
})
})
}
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) copyAddress(gtx layout.Context, addr string) {
ui.events = append(ui.events, CopyEvent{Text: addr})
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 {
for ui.self.Clicked() {
ui.copyAddress(gtx, addr)
}
return Background{Color: rgb(headerColor)}.Layout(gtx, func(gtx C) D {
return layout.Inset{
Right: unit.Max(gtx.Metric, sysIns.Right, unit.Dp(8)),
Left: unit.Max(gtx.Metric, 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 = ui.theme.Color.InvText
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: unit.Max(gtx.Metric, sysIns.Right, unit.Dp(8)),
Left: unit.Max(gtx.Metric, 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 {
return ui.icons.search.Layout(gtx, unit.Dp(24))
}),
layout.Flexed(1,
material.Editor(ui.theme, &ui.search, "Search by hostname...").Layout,
),
)
})
})
})
})
}
// drawLogo draws the Tailscale logo using vector operations.
func drawLogo(ops *op.Ops, size int) {
scale := float32(size) / 680
discDia := 170 * scale
off := 172 * 1.5 * scale
tx := op.Offset(f32.Pt(off, 0))
ty := op.Offset(f32.Pt(0, off))
st := op.Push(ops)
defer st.Pop()
// First row of discs.
row := op.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.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.Push(ops)
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.Value) layout.Dimensions {
defer op.Push(gtx.Ops).Pop()
img.Add(gtx.Ops)
sz := img.Size()
aspect := float32(sz.Y) / float32(sz.X)
w := gtx.Px(size)
h := int(float32(w)*aspect + .5)
scale := float32(w) / float32(sz.X)
op.Affine(f32.Affine2D{}.Scale(f32.Point{}, f32.Point{X: scale, Y: scale})).Add(gtx.Ops)
paint.PaintOp{}.Add(gtx.Ops)
return layout.Dimensions{Size: image.Pt(w, h)}
}
func drawDisc(ops *op.Ops, radius float32, col color.NRGBA) {
defer op.Push(ops).Pop()
r2 := radius * .5
dr := f32.Rectangle{Max: f32.Pt(radius, radius)}
clip.RRect{
Rect: dr,
NE: r2, NW: r2, SE: r2, SW: r2,
}.Add(ops)
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.Value
}
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.Px(b.CornerRadius); r > 0 {
rr := float32(r)
clip.RRect{
Rect: f32.Rectangle{Max: f32.Point{
X: float32(sz.X),
Y: float32(sz.Y),
}},
NE: rr, NW: rr, SE: rr, SW: rr,
}.Add(gtx.Ops)
}
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 op.Push(gtx.Ops).Pop()
clip.Rect(image.Rectangle{Max: sz}).Add(gtx.Ops)
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.`