feat: initial commit

pkg/browser/browser.go

@@ -0,0 +1,35 @@
+package browser
+
+import "fmt"
+
+type Status int
+
+const (
+	StatusUnknown Status = iota
+	StatusIdle
+	StatusCasting
+)
+
+func (s Status) String() string {
+	switch s {
+	case StatusIdle:
+		return "idle"
+	case StatusCasting:
+		return "casting"
+	default:
+		return fmt.Sprintf("unknown (%d)", s)
+	}
+}
+
+type Browser interface {
+	// Cast loads an URL
+	Load(url string) error
+	// Reset resets the browser to the given idle URL
+	Reset(url string) error
+	// Status returns the browser's current status
+	Status() (Status, error)
+	// Title returns the browser's currently loaded page title
+	Title() (string, error)
+	// URL returns the browser's currently loaded page URL
+	URL() (string, error)
+}

pkg/browser/dummy/browser.go

@@ -0,0 +1,52 @@
+package dummy
+
+import (
+	"context"
+
+	"forge.cadoles.com/arcad/arcast/pkg/browser"
+	"gitlab.com/wpetit/goweb/logger"
+)
+
+type Browser struct {
+	status browser.Status
+	url    string
+}
+
+// Load implements browser.Browser.
+func (b *Browser) Load(url string) error {
+	logger.Debug(context.Background(), "loading url", logger.F("url", url))
+	b.status = browser.StatusCasting
+	b.url = url
+	return nil
+}
+
+// Status implements browser.Browser.
+func (b *Browser) Status() (browser.Status, error) {
+	return b.status, nil
+}
+
+// Title implements browser.Browser.
+func (b *Browser) Title() (string, error) {
+	return "", nil
+}
+
+// URL implements browser.Browser.
+func (b *Browser) URL() (string, error) {
+	return b.url, nil
+}
+
+// Reset implements browser.Browser.
+func (b *Browser) Reset(url string) error {
+	b.status = browser.StatusIdle
+	b.url = url
+	return nil
+}
+
+func NewBrowser() *Browser {
+	return &Browser{
+		status: browser.StatusIdle,
+		url:    "",
+	}
+}
+
+var _ browser.Browser = &Browser{}

pkg/browser/gioui/browser.go

@@ -0,0 +1,118 @@
+package gioui
+
+import (
+	"context"
+	"sync"
+
+	"forge.cadoles.com/arcad/arcast/pkg/browser"
+	"gioui.org/app"
+	"gioui.org/f32"
+	"gioui.org/layout"
+	"github.com/gioui-plugins/gio-plugins/webviewer"
+	"gitlab.com/wpetit/goweb/logger"
+)
+
+type Browser struct {
+	window *app.Window
+	tag    int
+
+	url     string
+	changed bool
+
+	status browser.Status
+	title  string
+
+	mutex sync.Mutex
+}
+
+func (b *Browser) Layout(gtx layout.Context) {
+	b.mutex.Lock()
+	defer b.mutex.Unlock()
+
+	events := gtx.Events(&b.tag)
+	for _, evt := range events {
+		switch ev := evt.(type) {
+		case webviewer.TitleEvent:
+			b.title = ev.Title
+		case webviewer.NavigationEvent:
+			b.url = ev.URL
+		}
+	}
+
+	ctx := context.Background()
+	logger.Debug(ctx, "drawing")
+
+	webviewer.WebViewOp{Tag: &b.tag}.Push(gtx.Ops)
+
+	webviewer.OffsetOp{Point: f32.Point{Y: float32(gtx.Constraints.Max.Y - gtx.Constraints.Max.Y)}}.Add(gtx.Ops)
+	webviewer.RectOp{Size: f32.Point{X: float32(gtx.Constraints.Max.X), Y: float32(gtx.Constraints.Max.Y)}}.Add(gtx.Ops)
+
+	if b.changed {
+		logger.Debug(ctx, "url changed", logger.F("url", b.url))
+		webviewer.NavigateOp{URL: b.url}.Add(gtx.Ops)
+		b.changed = false
+	}
+}
+
+// Load implements browser.Browser.
+func (b *Browser) Load(url string) error {
+	b.mutex.Lock()
+	defer b.mutex.Unlock()
+
+	b.url = url
+	b.changed = true
+	b.status = browser.StatusCasting
+
+	b.window.Invalidate()
+
+	return nil
+}
+
+// Status implements browser.Browser.
+func (b *Browser) Status() (browser.Status, error) {
+	b.mutex.Lock()
+	defer b.mutex.Unlock()
+
+	return b.status, nil
+}
+
+// Title implements browser.Browser.
+func (b *Browser) Title() (string, error) {
+	b.mutex.Lock()
+	defer b.mutex.Unlock()
+
+	return b.title, nil
+}
+
+// URL implements browser.Browser.
+func (b *Browser) URL() (string, error) {
+	b.mutex.Lock()
+	defer b.mutex.Unlock()
+
+	return b.url, nil
+}
+
+// Reset implements browser.Browser.
+func (b *Browser) Reset(url string) error {
+	b.mutex.Lock()
+	defer b.mutex.Unlock()
+
+	b.url = url
+	b.changed = true
+	b.status = browser.StatusIdle
+
+	b.window.Invalidate()
+
+	return nil
+}
+
+func NewBrowser(window *app.Window) *Browser {
+	return &Browser{
+		window:  window,
+		url:     "",
+		changed: true,
+		status:  browser.StatusIdle,
+	}
+}
+
+var _ browser.Browser = &Browser{}

pkg/browser/lorca/browser.go

@@ -0,0 +1,100 @@
+package lorca
+
+import (
+	"context"
+
+	"forge.cadoles.com/arcad/arcast/pkg/browser"
+	"github.com/pkg/errors"
+	"github.com/zserge/lorca"
+	"gitlab.com/wpetit/goweb/logger"
+)
+
+type Browser struct {
+	ui     lorca.UI
+	status browser.Status
+	opts   *Options
+}
+
+func (b *Browser) Start() error {
+	logger.Debug(context.Background(), "starting browser", logger.F("opts", b.opts))
+
+	ui, err := lorca.New("", "", b.opts.Width, b.opts.Height, b.opts.ChromeArgs...)
+	if err != nil {
+		return errors.WithStack(err)
+	}
+
+	b.ui = ui
+
+	return nil
+}
+
+func (b *Browser) Stop() error {
+	if err := b.ui.Close(); err != nil {
+		return errors.WithStack(err)
+	}
+
+	b.ui = nil
+
+	return nil
+}
+
+func (b *Browser) Wait() {
+	<-b.ui.Done()
+}
+
+// Load implements browser.Browser.
+func (b *Browser) Load(url string) error {
+	if err := b.ui.Load(url); err != nil {
+		return errors.WithStack(err)
+	}
+
+	b.status = browser.StatusCasting
+
+	return nil
+}
+
+// Unload implements browser.Browser.
+func (b *Browser) Reset(url string) error {
+	if err := b.ui.Load(url); err != nil {
+		return errors.WithStack(err)
+	}
+
+	b.status = browser.StatusIdle
+
+	return nil
+}
+
+// Status implements browser.Browser.
+func (b *Browser) Status() (browser.Status, error) {
+	return b.status, nil
+}
+
+// Title implements browser.Browser.
+func (b *Browser) Title() (string, error) {
+	result := b.ui.Eval("document.title.toString()")
+	if err := result.Err(); err != nil {
+		return "", errors.WithStack(err)
+	}
+
+	return result.String(), nil
+}
+
+// URL implements browser.Browser.
+func (b *Browser) URL() (string, error) {
+	result := b.ui.Eval("window.location.toString()")
+	if err := result.Err(); err != nil {
+		return "", errors.WithStack(err)
+	}
+
+	return result.String(), nil
+}
+
+func NewBrowser(funcs ...OptionsFunc) *Browser {
+	opts := NewOptions(funcs...)
+	return &Browser{
+		status: browser.StatusIdle,
+		opts:   opts,
+	}
+}
+
+var _ browser.Browser = &Browser{}

pkg/browser/lorca/options.go

@@ -0,0 +1,40 @@
+package lorca
+
+type Options struct {
+	Width      int
+	Height     int
+	ChromeArgs []string
+}
+
+type OptionsFunc func(opts *Options)
+
+var DefaultChromeArgs = []string{
+	"--remote-allow-origins=*",
+}
+
+func NewOptions(funcs ...OptionsFunc) *Options {
+	opts := &Options{
+		Width:      800,
+		Height:     600,
+		ChromeArgs: DefaultChromeArgs,
+	}
+
+	for _, fn := range funcs {
+		fn(opts)
+	}
+
+	return opts
+}
+
+func WithWindowSize(width, height int) OptionsFunc {
+	return func(opts *Options) {
+		opts.Width = width
+		opts.Height = height
+	}
+}
+
+func WithAdditionalChromeArgs(args ...string) OptionsFunc {
+	return func(opts *Options) {
+		opts.ChromeArgs = append(args, DefaultChromeArgs...)
+	}
+}