ref: 9f8de84236cf810522711cfd55744c1adba7981d
dir: /cmd/opossum/main.go/
package main
import (
"9fans.net/go/draw"
"fmt"
"github.com/mjl-/duit"
"github.com/psilva261/opossum/browser"
"github.com/psilva261/opossum/js"
"github.com/psilva261/opossum/logger"
"github.com/psilva261/opossum/style"
"image"
"net/url"
"os"
"os/signal"
"runtime"
"runtime/pprof"
"strings"
"time"
)
var (
dui *duit.DUI
b *browser.Browser
cpuprofile string
memprofile string
loc string = "http://9p.io"
dbg bool
v View
Style = style.Map{}
)
func init() {
browser.EnableNoScriptTag = true
}
type View interface {
Render() []*duit.Kid
}
type Nav struct {
LocationField *duit.Field
StatusBar *duit.Label
}
func NewNav() (n *Nav) {
n = &Nav{
StatusBar: &duit.Label{
Text: "",
},
}
n.LocationField = &duit.Field{
Text: loc,
Font: Style.Font(),
Keys: n.keys,
}
return
}
func (n *Nav) keys(k rune, m draw.Mouse) (e duit.Event) {
if k == browser.EnterKey && !b.Loading() {
a := n.LocationField.Text
if !strings.HasPrefix(strings.ToLower(a), "http") {
a = "http://" + a
}
u, err := url.Parse(a)
if err != nil {
log.Errorf("parse url: %v", err)
return
}
return b.LoadUrl(u)
}
return
}
func (n *Nav) Render() []*duit.Kid {
uis := []duit.UI{
&duit.Grid{
Columns: 3,
Halign: []duit.Halign{duit.HalignLeft, duit.HalignLeft, duit.HalignRight},
Valign: []duit.Valign{duit.ValignMiddle, duit.ValignMiddle, duit.ValignMiddle},
Kids: duit.NewKids(
&duit.Button{
Text: "Back",
Font: browser.Style.Font(),
Click: b.Back,
},
&duit.Button{
Text: "Stop",
Font: browser.Style.Font(),
Click: func() duit.Event {
b.Cancel()
return duit.Event{
Consumed: true,
}
},
},
&duit.Box{
Kids: duit.NewKids(
n.LocationField,
),
},
),
},
n.StatusBar,
}
if b != nil {
uis = append(uis, b.Website)
}
return duit.NewKids(uis...)
}
type Confirm struct {
text string
value string
res chan *string
done bool
}
func (c *Confirm) Render() []*duit.Kid {
f := &duit.Field{
Text: c.value,
}
return duit.NewKids(
&duit.Grid{
Columns: 3,
Padding: duit.NSpace(3, duit.SpaceXY(5, 3)),
Halign: []duit.Halign{duit.HalignLeft, duit.HalignLeft, duit.HalignRight},
Valign: []duit.Valign{duit.ValignMiddle, duit.ValignMiddle, duit.ValignMiddle},
Kids: duit.NewKids(
&duit.Button{
Text: "Ok",
Font: browser.Style.Font(),
Click: func() (e duit.Event) {
if c.done {
return
}
s := f.Text
c.res <- &s
c.done = true
e.Consumed = true
v = NewNav()
render()
return
},
},
&duit.Button{
Text: "Abort",
Font: browser.Style.Font(),
Click: func() (e duit.Event) {
if c.done {
return
}
close(c.res)
c.done = true
e.Consumed = true
v = NewNav()
render()
return
},
},
f,
),
},
&duit.Label{
Text: c.text,
},
)
}
func render() {
white, err := dui.Display.AllocImage(image.Rect(0, 0, 1, 1), draw.ARGB32, true, 0xffffffff)
if err != nil {
log.Errorf("%v", err)
}
dui.Top.UI = &duit.Box{
Kids: v.Render(),
Background: white,
}
if b != nil {
browser.PrintTree(b.Website.UI)
}
log.Printf("Render.....")
dui.MarkLayout(dui.Top.UI)
dui.MarkDraw(dui.Top.UI)
dui.Render()
log.Printf("Rendering done")
}
func Main() (err error) {
dui, err = duit.NewDUI("opossum", nil) // TODO: rm global var
if err != nil {
return fmt.Errorf("new dui: %w", err)
}
dui.Debug = dbg
resize()
style.Init(dui)
v = NewNav()
render()
b = &browser.Browser{
LocCh: make(chan string, 10),
}
b = browser.NewBrowser(dui, loc)
b.Download = func(res chan *string) {
v = &Confirm{
text: fmt.Sprintf("Download %v", b.URL()),
value: "/download.file",
res: res,
}
render()
return
}
v = NewNav()
render()
for {
select {
case e := <-dui.Inputs:
//log.Infof("e=%v", e)
dui.Input(e)
if e.Type == duit.InputResize {
resize()
}
case loc = <-b.LocCh:
log.Infof("loc=%v", loc)
ue, err := url.QueryUnescape(loc)
if err == nil {
loc = ue
} else {
log.Errorf("unescape %v: %v", loc, err)
}
if nav, ok := v.(*Nav); ok {
nav.LocationField.Text = loc
}
case msg := <-b.StatusCh:
if nav, ok := v.(*Nav); ok {
if msg == "" {
nav.StatusBar.Text = ""
} else {
nav.StatusBar.Text += msg + "\n"
}
dui.MarkLayout(nav.StatusBar)
dui.MarkDraw(nav.StatusBar)
dui.Render()
}
case err, ok := <-dui.Error:
//log.Infof("err=%v", err)
if !ok {
finalize()
return nil
}
log.Printf("main: duit: %s\n", err)
}
}
}
func usage() {
fmt.Printf("usage: opossum [-v|-vv] [-h] [-jsinsecure] [-cpu|-mem fn] [startPage]\n")
os.Exit(1)
}
func main() {
quiet := true
args := os.Args[1:]
for len(args) > 0 {
switch args[0] {
case "-vv":
quiet = false
dbg = true
args = args[1:]
case "-v":
quiet = false
args = args[1:]
case "-h":
usage()
args = args[1:]
case "-jsinsecure":
browser.ExperimentalJsInsecure = true
args = args[1:]
case "-cpu":
cpuprofile, args = args[1], args[2:]
case "-mem":
memprofile, args = args[1], args[2:]
default:
if len(args) > 1 {
usage()
}
loc, args = args[0], args[1:]
}
}
if quiet {
log.SetQuiet()
}
if cpuprofile != "" {
f, err := os.Create(cpuprofile)
if err != nil {
log.Fatalf("%v", err)
}
pprof.StartCPUProfile(f)
go func() {
<-time.After(time.Minute)
pprof.StopCPUProfile()
f.Close()
os.Exit(2)
}()
}
if memprofile != "" {
f, err := os.Create(memprofile)
if err != nil {
log.Fatalf("%v", err)
}
go func() {
<-time.After(time.Minute)
runtime.GC()
pprof.WriteHeapProfile(f)
f.Close()
os.Exit(2)
}()
}
log.Debug = dbg
done := make(chan os.Signal, 1)
signal.Notify(done, os.Interrupt, os.Kill)
go func() {
<-done
finalize()
}()
if err := Main(); err != nil {
log.Fatalf("Main: %v", err)
}
}
func finalize() {
js.Stop()
os.Exit(1)
}
func resize() {
size := dui.Display.ScreenImage.R.Size()
style.WindowWidth = size.X/dui.Scale(1)
style.WindowHeight = size.Y/dui.Scale(1)
}