Harden stub manager nil receivers

stubs/wails/pkg/application/browser_manager.go

@@ -18,6 +18,9 @@ type BrowserManager struct {
 //	manager.OpenURL("https://lthn.io")
 //	_ = manager.LastURL // "https://lthn.io"
 func (bm *BrowserManager) OpenURL(url string) error {
+	if bm == nil {
+		return nil
+	}
 	bm.mu.Lock()
 	bm.LastURL = url
 	bm.mu.Unlock()
@@ -29,6 +32,9 @@ func (bm *BrowserManager) OpenURL(url string) error {
 //	manager.OpenFile("/home/user/report.pdf")
 //	_ = manager.LastFile // "/home/user/report.pdf"
 func (bm *BrowserManager) OpenFile(path string) error {
+	if bm == nil {
+		return nil
+	}
 	bm.mu.Lock()
 	bm.LastFile = path
 	bm.mu.Unlock()

stubs/wails/pkg/application/browser_manager_test.go

@@ -59,3 +59,12 @@ func TestBrowserManager_OpenFile_Ugly(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, "/tmp/\x00report.txt", manager.LastFile)
 }
+
+func TestBrowserManager_NilReceiver_IsSafe(t *testing.T) {
+	var manager *BrowserManager
+
+	assert.NotPanics(t, func() {
+		assert.NoError(t, manager.OpenURL("https://example.com"))
+		assert.NoError(t, manager.OpenFile("/tmp/report.txt"))
+	})
+}

stubs/wails/pkg/application/clipboard.go

@@ -17,6 +17,9 @@ type Clipboard struct {
 //
 //	cb.SetText("copied content")
 func (c *Clipboard) SetText(text string) bool {
+	if c == nil {
+		return false
+	}
 	c.mu.Lock()
 	c.text = text
 	c.set = true
@@ -29,6 +32,9 @@ func (c *Clipboard) SetText(text string) bool {
 //	text, ok := cb.Text()
 //	if !ok { text = "" }
 func (c *Clipboard) Text() (string, bool) {
+	if c == nil {
+		return "", false
+	}
 	c.mu.RLock()
 	defer c.mu.RUnlock()
 	return c.text, c.set
@@ -48,6 +54,9 @@ type ClipboardManager struct {
 //
 //	manager.SetText("some text")
 func (cm *ClipboardManager) SetText(text string) bool {
+	if cm == nil {
+		return false
+	}
 	return cm.getClipboard().SetText(text)
 }
 
@@ -55,11 +64,17 @@ func (cm *ClipboardManager) SetText(text string) bool {
 //
 //	text, ok := manager.Text()
 func (cm *ClipboardManager) Text() (string, bool) {
+	if cm == nil {
+		return "", false
+	}
 	return cm.getClipboard().Text()
 }
 
 // getClipboard returns the clipboard instance, creating it if needed.
 func (cm *ClipboardManager) getClipboard() *Clipboard {
+	if cm == nil {
+		return &Clipboard{}
+	}
 	cm.mu.Lock()
 	defer cm.mu.Unlock()
 	if cm.clipboard == nil {

stubs/wails/pkg/application/clipboard_test.go

@@ -71,3 +71,14 @@ func TestClipboardManager_Text_Ugly(t *testing.T) {
 	assert.True(t, present)
 	assert.Equal(t, raw, text)
 }
+
+func TestClipboardManager_NilReceiver_IsSafe(t *testing.T) {
+	var manager *ClipboardManager
+
+	assert.NotPanics(t, func() {
+		assert.False(t, manager.SetText("hello"))
+		text, present := manager.Text()
+		assert.Empty(t, text)
+		assert.False(t, present)
+	})
+}

stubs/wails/pkg/application/keybinding.go

@@ -23,6 +23,9 @@ type KeyBindingManager struct {
 //
 //	manager.Add("CmdOrCtrl+Shift+P", func(w Window) { launchCommandPalette(w) })
 func (m *KeyBindingManager) Add(accelerator string, callback func(window Window)) {
+	if m == nil {
+		return
+	}
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	if m.bindings == nil {
@@ -35,6 +38,9 @@ func (m *KeyBindingManager) Add(accelerator string, callback func(window Window)
 //
 //	manager.Remove("CmdOrCtrl+Shift+P")
 func (m *KeyBindingManager) Remove(accelerator string) {
+	if m == nil {
+		return
+	}
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	delete(m.bindings, accelerator)
@@ -44,6 +50,9 @@ func (m *KeyBindingManager) Remove(accelerator string) {
 //
 //	if manager.Process("CmdOrCtrl+K", window) { return }
 func (m *KeyBindingManager) Process(accelerator string, window Window) (handled bool) {
+	if m == nil {
+		return false
+	}
 	m.mu.RLock()
 	callback, exists := m.bindings[accelerator]
 	m.mu.RUnlock()
@@ -64,6 +73,9 @@ func (m *KeyBindingManager) Process(accelerator string, window Window) (handled
 //
 //	for _, kb := range manager.GetAll() { log(kb.Accelerator) }
 func (m *KeyBindingManager) GetAll() []*KeyBinding {
+	if m == nil {
+		return nil
+	}
 	m.mu.RLock()
 	defer m.mu.RUnlock()
 	bindings := make([]*KeyBinding, 0, len(m.bindings))

stubs/wails/pkg/application/keybinding_test.go

@@ -79,3 +79,14 @@ func TestKeyBindingManager_Remove_Ugly(t *testing.T) {
 
 	assert.Empty(t, manager.GetAll())
 }
+
+func TestKeyBindingManager_NilReceiver_IsSafe(t *testing.T) {
+	var manager *KeyBindingManager
+
+	assert.NotPanics(t, func() {
+		manager.Add("CmdOrCtrl+K", func(Window) {})
+		manager.Remove("CmdOrCtrl+K")
+		assert.False(t, manager.Process("CmdOrCtrl+K", nil))
+		assert.Nil(t, manager.GetAll())
+	})
+}