Add FFmpeg utilities configuration UI and automated downloading

Introduce a new UI for configuring FFmpeg, FFprobe, and FFplay paths with file selection and error handling. Add platform-specific logic for downloading and extracting FFmpeg binaries directly within the application, improving user experience.

internal/gui/view/configuring_ffmpeg_utilities.go

@@ -0,0 +1,129 @@
+package view
+
+import (
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/canvas"
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/lang"
+	"fyne.io/fyne/v2/storage"
+	"fyne.io/fyne/v2/widget"
+	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/gui/window"
+	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/utils"
+	"image/color"
+	"net/url"
+	"path/filepath"
+)
+
+func ConfiguringFFmpegUtilities(
+	window window.WindowContract,
+	currentPathFFmpeg string,
+	currentPathFFprobe string,
+	currentPathFFplay string,
+	save func(ffmpegPath string, ffprobePath string, ffplayPath string) error,
+	cancel func(),
+	donwloadFFmpeg fyne.CanvasObject,
+) fyne.CanvasObject {
+	errorMessage := canvas.NewText("", color.RGBA{R: 255, G: 0, B: 0, A: 255})
+	errorMessage.TextSize = 16
+	errorMessage.TextStyle = fyne.TextStyle{Bold: true}
+
+	link := widget.NewHyperlink("https://ffmpeg.org/download.html", &url.URL{
+		Scheme: "https",
+		Host:   "ffmpeg.org",
+		Path:   "download.html",
+	})
+
+	ffmpegPath, buttonFFmpeg, buttonFFmpegMessage := configuringFFmpegUtilitiesButtonSelectFile(window, currentPathFFmpeg)
+	ffprobePath, buttonFFprobe, buttonFFprobeMessage := configuringFFmpegUtilitiesButtonSelectFile(window, currentPathFFprobe)
+	ffplayPath, buttonFFplay, buttonFFplayMessage := configuringFFmpegUtilitiesButtonSelectFile(window, currentPathFFplay)
+
+	form := &widget.Form{
+		Items: []*widget.FormItem{
+			{
+				Text:   lang.L("titleDownloadLink"),
+				Widget: link,
+			},
+			{
+				Text:   lang.L("pathToFfmpeg"),
+				Widget: buttonFFmpeg,
+			},
+			{
+				Widget: container.NewHScroll(buttonFFmpegMessage),
+			},
+			{
+				Text:   lang.L("pathToFfprobe"),
+				Widget: buttonFFprobe,
+			},
+			{
+				Widget: container.NewHScroll(buttonFFprobeMessage),
+			},
+			{
+				Text:   lang.L("pathToFfplay"),
+				Widget: buttonFFplay,
+			},
+			{
+				Widget: container.NewHScroll(buttonFFplayMessage),
+			},
+			{
+				Widget: container.NewHScroll(errorMessage),
+			},
+		},
+		SubmitText: lang.L("save"),
+		OnSubmit: func() {
+			err := save(*ffmpegPath, *ffprobePath, *ffplayPath)
+			if err != nil {
+				errorMessage.Text = err.Error()
+			}
+		},
+	}
+	if cancel != nil {
+		form.OnCancel = cancel
+		form.CancelText = lang.L("cancel")
+	}
+
+	selectFFPathTitle := lang.L("selectFFPathTitle")
+
+	return widget.NewCard(selectFFPathTitle, "", container.NewVBox(
+		form,
+		donwloadFFmpeg,
+	))
+}
+
+func configuringFFmpegUtilitiesButtonSelectFile(window window.WindowContract, path string) (filePath *string, button *widget.Button, buttonMessage *canvas.Text) {
+	filePath = &path
+
+	buttonMessage = canvas.NewText(path, color.RGBA{R: 49, G: 127, B: 114, A: 255})
+	buttonMessage.TextSize = 16
+	buttonMessage.TextStyle = fyne.TextStyle{Bold: true}
+
+	buttonTitle := lang.L("choose")
+
+	var locationURI fyne.ListableURI
+	if len(path) > 0 {
+		listableURI := storage.NewFileURI(filepath.Dir(path))
+		locationURI, _ = storage.ListerForURI(listableURI)
+	}
+
+	button = widget.NewButton(buttonTitle, func() {
+		window.NewFileOpen(func(r fyne.URIReadCloser, err error) {
+			if err != nil {
+				buttonMessage.Text = err.Error()
+				utils.SetStringErrorStyle(buttonMessage)
+				return
+			}
+			if r == nil {
+				return
+			}
+
+			path = r.URI().Path()
+
+			buttonMessage.Text = r.URI().Path()
+			utils.SetStringSuccessStyle(buttonMessage)
+
+			listableURI := storage.NewFileURI(filepath.Dir(r.URI().Path()))
+			locationURI, _ = storage.ListerForURI(listableURI)
+		}, locationURI)
+	})
+
+	return filePath, button, buttonMessage
+}

internal/gui/window/main.go

@@ -3,15 +3,18 @@ package window
 import (
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/dialog"
 	"fyne.io/fyne/v2/lang"
 	"fyne.io/fyne/v2/widget"
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/application"
+	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/utils"
 )
 
-type MainWindowContract interface {
+type WindowContract interface {
 	SetContent(content fyne.CanvasObject)
 	Show()
 	InitLayout()
+	NewFileOpen(callback func(fyne.URIReadCloser, error), location fyne.ListableURI) *dialog.FileDialog
 }
 
 type mainWindow struct {
@@ -20,7 +23,7 @@ type mainWindow struct {
 	progressBarService application.ProgressBarContract
 }
 
-func NewMainWindow(fyneWindow fyne.Window, progressBarService application.ProgressBarContract) MainWindowContract {
+func NewMainWindow(fyneWindow fyne.Window, progressBarService application.ProgressBarContract) WindowContract {
 	fyneWindow.Resize(fyne.Size{Width: 1039, Height: 599})
 	fyneWindow.CenterOnScreen()
 
@@ -40,6 +43,16 @@ func (w *mainWindow) InitLayout() {
 	})
 }
 
+func (w *mainWindow) NewFileOpen(callback func(fyne.URIReadCloser, error), location fyne.ListableURI) *dialog.FileDialog {
+	fileDialog := dialog.NewFileOpen(callback, w.fyneWindow)
+	utils.FileDialogResize(fileDialog, w.fyneWindow)
+	fileDialog.Show()
+	if location != nil {
+		fileDialog.SetLocation(location)
+	}
+	return fileDialog
+}
+
 func (w *mainWindow) SetContent(content fyne.CanvasObject) {
 	fyne.Do(func() {
 		if w.layout == nil {