fix: open native directory picker for new instances

internal/ui/shell.go

@@ -31,6 +31,8 @@ const (
 
 type PathSearcher func(context.Context, PathField, string) (string, error)
 
+type DirectoryChooser func(context.Context) (string, error)
+
 type pathSearchState struct {
 	request uint64
 	cancel  context.CancelFunc
@@ -44,6 +46,18 @@ type pathSearchResult struct {
 	err     error
 }
 
+type directoryPickState struct {
+	request uint64
+	cancel  context.CancelFunc
+	running bool
+}
+
+type directoryPickResult struct {
+	request uint64
+	path    string
+	err     error
+}
+
 // InstanceRow is the read-only view model used by the first Gio shell.
 // Runtime data will replace these fixtures when the application service is wired.
 type InstanceRow struct {
@@ -97,13 +111,16 @@ type Shell struct {
 	pathFeedback string
 	formFeedback string
 
-	list          widget.List
-	rows          []InstanceRow
-	onSave        func(SettingsState)
-	pathSearcher  PathSearcher
-	invalidate    func()
-	searches      map[PathField]*pathSearchState
-	searchResults chan pathSearchResult
+	list             widget.List
+	rows             []InstanceRow
+	onSave           func(SettingsState)
+	pathSearcher     PathSearcher
+	invalidate       func()
+	searches         map[PathField]*pathSearchState
+	searchResults    chan pathSearchResult
+	directoryChooser DirectoryChooser
+	directoryPick    directoryPickState
+	directoryResults chan directoryPickResult
 }
 
 func NewShell(theme *material.Theme) *Shell {
@@ -117,7 +134,7 @@ func NewShell(theme *material.Theme) *Shell {
 		PathEdgeExecutable:   {},
 		PathDefaultUserData:  {},
 		PathLogDirectory:     {},
-	}, searchResults: make(chan pathSearchResult, 8)}
+	}, searchResults: make(chan pathSearchResult, 8), directoryResults: make(chan directoryPickResult, 1)}
 	s.chromePath.SetText(`C:\Program Files\Google\Chrome\Application\chrome.exe`)
 	s.edgePath.SetText(`C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe`)
 	s.dataDir.SetText(`C:\Users\Public\chub\profiles`)
@@ -149,8 +166,14 @@ func (s *Shell) OnPathSearch(searcher PathSearcher, invalidate func()) {
 	s.invalidate = invalidate
 }
 
+func (s *Shell) OnChooseDirectory(chooser DirectoryChooser, invalidate func()) {
+	s.directoryChooser = chooser
+	s.invalidate = invalidate
+}
+
 func (s *Shell) Layout(gtx layout.Context) layout.Dimensions {
 	s.consumeSearchResults()
+	s.consumeDirectoryResults()
 	for s.instancesClick.Clicked(gtx) {
 		s.page = pageInstances
 	}
@@ -170,7 +193,7 @@ func (s *Shell) Layout(gtx layout.Context) layout.Dimensions {
 		}
 	}
 	for s.instanceDirPick.Clicked(gtx) {
-		s.formFeedback = "请选择实例 User Data Dir（原生文件夹选择器待接入）。"
+		s.chooseInstanceDirectory()
 	}
 	for s.backClick.Clicked(gtx) {
 		s.page = pageInstances
@@ -379,7 +402,7 @@ func (s *Shell) instanceDirField(gtx layout.Context) layout.Dimensions {
 			return layout.Flex{Alignment: layout.Middle}.Layout(gtx,
 				layout.Flexed(1, material.Editor(s.theme, &s.instanceDir, "请输入或粘贴绝对路径").Layout),
 				layout.Rigid(layout.Spacer{Width: unit.Dp(8)}.Layout),
-				layout.Rigid(material.Button(s.theme, &s.instanceDirPick, "选择路径").Layout),
+				layout.Rigid(material.Button(s.theme, &s.instanceDirPick, s.instanceDirButtonLabel()).Layout),
 			)
 		}),
 	)
@@ -488,6 +511,66 @@ func browserDisplay(value string) string {
 	return "Chrome"
 }
 
+func (s *Shell) chooseInstanceDirectory() {
+	if s.directoryPick.running {
+		s.formFeedback = "目录选择器已打开，请在系统窗口中选择或取消。"
+		return
+	}
+	if s.directoryChooser == nil {
+		s.formFeedback = "目录选择器尚未准备好。"
+		return
+	}
+	s.directoryPick.request++
+	request := s.directoryPick.request
+	ctx, cancel := context.WithCancel(context.Background())
+	s.directoryPick.cancel = cancel
+	s.directoryPick.running = true
+	s.formFeedback = "正在打开目录选择器…"
+	go func() {
+		path, err := s.directoryChooser(ctx)
+		s.directoryResults <- directoryPickResult{request: request, path: path, err: err}
+		if s.invalidate != nil {
+			s.invalidate()
+		}
+	}()
+}
+
+func (s *Shell) consumeDirectoryResults() {
+	for {
+		select {
+		case result := <-s.directoryResults:
+			if !s.directoryPick.running || result.request != s.directoryPick.request {
+				continue
+			}
+			s.directoryPick.running = false
+			s.directoryPick.cancel = nil
+			if result.err != nil {
+				if errors.Is(result.err, context.Canceled) {
+					s.formFeedback = "已取消选择 User Data Dir。"
+				} else {
+					s.formFeedback = fmt.Sprintf("选择 User Data Dir 失败：%v", result.err)
+				}
+				continue
+			}
+			if result.path == "" {
+				s.formFeedback = "未选择 User Data Dir。"
+				continue
+			}
+			s.instanceDir.SetText(result.path)
+			s.formFeedback = "已更新 User Data Dir。"
+		default:
+			return
+		}
+	}
+}
+
+func (s *Shell) instanceDirButtonLabel() string {
+	if s.directoryPick.running {
+		return "选择中…"
+	}
+	return "选择路径"
+}
+
 func (s *Shell) resetSettings() {
 	s.chromePath.SetText(`C:\Program Files\Google\Chrome\Application\chrome.exe`)
 	s.edgePath.SetText(`C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe`)

internal/ui/shell_test.go

@@ -115,3 +115,22 @@ func TestShellIgnoresCancelledPathSearchResult(t *testing.T) {
 		t.Fatal("cancelled result overwrote the editor")
 	}
 }
+
+func TestShellAppliesSelectedInstanceDirectory(t *testing.T) {
+	shell := NewShell(material.NewTheme())
+	shell.OnChooseDirectory(func(context.Context) (string, error) {
+		return `C:\profiles\new-instance`, nil
+	}, nil)
+	shell.chooseInstanceDirectory()
+	var result directoryPickResult
+	select {
+	case result = <-shell.directoryResults:
+	case <-time.After(time.Second):
+		t.Fatal("directory picker did not produce a result")
+	}
+	shell.directoryResults <- result
+	shell.consumeDirectoryResults()
+	if got := shell.instanceDir.Text(); got != `C:\profiles\new-instance` {
+		t.Fatalf("instance dir = %q", got)
+	}
+}