Improve mouse handling of suggestions panel (#4726)

- **PR Description**

In prompts with a suggestions panel (e.g. the "Execute shell command"
window, or the "Filter by path" panel), you can now
- scroll the list of suggestions with the mouse wheel even when the
  focus is in the edit field
- click in the suggestions list or in the edit field to switch focus
  between them
- double-click a suggestion to trigger it

pkg/gui/context/suggestions_context.go

@@ -88,3 +88,7 @@ func (self *SuggestionsContext) RefreshSuggestions() {
 func (self *SuggestionsContext) RangeSelectEnabled() bool {
 	return false
 }
+
+func (self *SuggestionsContext) GetOnClick() func() error {
+	return self.State.OnConfirm
+}

pkg/gui/controllers/commit_description_controller.go

@@ -2,7 +2,6 @@ package controllers
 
 import (
 	"github.com/jesseduffield/gocui"
-	"github.com/jesseduffield/lazygit/pkg/gui/context"
 	"github.com/jesseduffield/lazygit/pkg/gui/keybindings"
 	"github.com/jesseduffield/lazygit/pkg/gui/types"
 	"github.com/jesseduffield/lazygit/pkg/utils"
@@ -59,6 +58,7 @@ func (self *CommitDescriptionController) GetMouseKeybindings(opts types.Keybindi
 	return []*gocui.ViewMouseBinding{
 		{
 			ViewName:    self.Context().GetViewName(),
+			FocusedView: self.c.Contexts().CommitMessage.GetViewName(),
 			Key:         gocui.MouseLeft,
 			Handler:     self.onClick,
 		},
@@ -137,10 +137,6 @@ func (self *CommitDescriptionController) openCommitMenu() error {
 }
 
 func (self *CommitDescriptionController) onClick(opts gocui.ViewMouseBindingOpts) error {
-	// Activate the description panel when the commit message panel is currently active
-	if self.c.Context().Current().GetKey() == context.COMMIT_MESSAGE_CONTEXT_KEY {
 	self.c.Context().Replace(self.c.Contexts().CommitDescription)
-	}
-
 	return nil
 }

pkg/gui/controllers/commit_message_controller.go

@@ -63,6 +63,7 @@ func (self *CommitMessageController) GetMouseKeybindings(opts types.KeybindingsO
 	return []*gocui.ViewMouseBinding{
 		{
 			ViewName:    self.Context().GetViewName(),
+			FocusedView: self.c.Contexts().CommitDescription.GetViewName(),
 			Key:         gocui.MouseLeft,
 			Handler:     self.onClick,
 		},
@@ -194,10 +195,6 @@ func (self *CommitMessageController) openCommitMenu() error {
 }
 
 func (self *CommitMessageController) onClick(opts gocui.ViewMouseBindingOpts) error {
-	// Activate the commit message panel when the commit description panel is currently active
-	if self.c.Context().Current().GetKey() == context.COMMIT_DESCRIPTION_CONTEXT_KEY {
 	self.c.Context().Replace(self.c.Contexts().CommitMessage)
-	}
-
 	return nil
 }

pkg/gui/controllers/confirmation_controller.go

@@ -3,6 +3,7 @@ package controllers
 import (
 	"fmt"
 
+	"github.com/jesseduffield/gocui"
 	"github.com/jesseduffield/lazygit/pkg/gui/context"
 	"github.com/jesseduffield/lazygit/pkg/gui/types"
 )
@@ -41,15 +42,7 @@ func (self *ConfirmationController) GetKeybindings(opts types.KeybindingsOpts) [
 			Key: opts.GetKey(opts.Config.Universal.TogglePanel),
 			Handler: func() error {
 				if len(self.c.Contexts().Suggestions.State.Suggestions) > 0 {
-					subtitle := ""
+					self.switchToSuggestions()
-					if self.c.State().GetRepoState().GetCurrentPopupOpts().HandleDeleteSuggestion != nil {
-						// We assume that whenever things are deletable, they
-						// are also editable, so we show both keybindings
-						subtitle = fmt.Sprintf(self.c.Tr.SuggestionsSubtitle,
-							self.c.UserConfig().Keybinding.Universal.Remove, self.c.UserConfig().Keybinding.Universal.Edit)
-					}
-					self.c.Views().Suggestions.Subtitle = subtitle
-					self.c.Context().Replace(self.c.Contexts().Suggestions)
 				}
 				return nil
 			},
@@ -59,6 +52,22 @@ func (self *ConfirmationController) GetKeybindings(opts types.KeybindingsOpts) [
 	return bindings
 }
 
+func (self *ConfirmationController) GetMouseKeybindings(opts types.KeybindingsOpts) []*gocui.ViewMouseBinding {
+	return []*gocui.ViewMouseBinding{
+		{
+			ViewName:    self.c.Contexts().Suggestions.GetViewName(),
+			FocusedView: self.c.Contexts().Confirmation.GetViewName(),
+			Key:         gocui.MouseLeft,
+			Handler: func(gocui.ViewMouseBindingOpts) error {
+				self.switchToSuggestions()
+				// Let it fall through to the ListController's click handler so that
+				// the clicked line gets selected:
+				return gocui.ErrKeybindingNotHandled
+			},
+		},
+	}
+}
+
 func (self *ConfirmationController) GetOnFocusLost() func(types.OnFocusLostOpts) {
 	return func(types.OnFocusLostOpts) {
 		self.c.Helpers().Confirmation.DeactivateConfirmationPrompt()
@@ -72,3 +81,15 @@ func (self *ConfirmationController) Context() types.Context {
 func (self *ConfirmationController) context() *context.ConfirmationContext {
 	return self.c.Contexts().Confirmation
 }
+
+func (self *ConfirmationController) switchToSuggestions() {
+	subtitle := ""
+	if self.c.State().GetRepoState().GetCurrentPopupOpts().HandleDeleteSuggestion != nil {
+		// We assume that whenever things are deletable, they
+		// are also editable, so we show both keybindings
+		subtitle = fmt.Sprintf(self.c.Tr.SuggestionsSubtitle,
+			self.c.UserConfig().Keybinding.Universal.Remove, self.c.UserConfig().Keybinding.Universal.Edit)
+	}
+	self.c.Views().Suggestions.Subtitle = subtitle
+	self.c.Context().Replace(self.c.Contexts().Suggestions)
+}

pkg/gui/controllers/helpers/suggestions_helper.go

@@ -89,8 +89,6 @@ func (self *SuggestionsHelper) GetBranchNameSuggestionsFunc() func(string) []*ty
 // self.c.Model().FilesTrie. On the main thread we'll be doing a fuzzy search via
 // self.c.Model().FilesTrie. So if we've looked for a file previously, we'll start with
 // the old trie and eventually it'll be swapped out for the new one.
-// Notably, unlike other suggestion functions we're not showing all the options
-// if nothing has been typed because there'll be too much to display efficiently
 func (self *SuggestionsHelper) GetFilePathSuggestionsFunc() func(string) []*types.Suggestion {
 	_ = self.c.WithWaitingStatus(self.c.Tr.LoadingFileSuggestions, func(gocui.Task) error {
 		trie := patricia.NewTrie()
@@ -105,7 +103,9 @@ func (self *SuggestionsHelper) GetFilePathSuggestionsFunc() func(string) []*type
 				if err != nil {
 					return err
 				}
+				if path != "." {
 					trie.Insert(patricia.Prefix(path), path)
+				}
 				return nil
 			})
 

pkg/gui/controllers/suggestions_controller.go

@@ -1,6 +1,7 @@
 package controllers
 
 import (
+	"github.com/jesseduffield/gocui"
 	"github.com/jesseduffield/lazygit/pkg/gui/context"
 	"github.com/jesseduffield/lazygit/pkg/gui/types"
 )
@@ -69,6 +70,19 @@ func (self *SuggestionsController) GetKeybindings(opts types.KeybindingsOpts) []
 	return bindings
 }
 
+func (self *SuggestionsController) GetMouseKeybindings(opts types.KeybindingsOpts) []*gocui.ViewMouseBinding {
+	return []*gocui.ViewMouseBinding{
+		{
+			ViewName:    self.c.Contexts().Confirmation.GetViewName(),
+			FocusedView: self.c.Contexts().Suggestions.GetViewName(),
+			Key:         gocui.MouseLeft,
+			Handler: func(gocui.ViewMouseBindingOpts) error {
+				return self.switchToConfirmation()
+			},
+		},
+	}
+}
+
 func (self *SuggestionsController) switchToConfirmation() error {
 	self.c.Views().Suggestions.Subtitle = ""
 	self.c.Views().Suggestions.Highlight = false

pkg/gui/keybindings.go

@@ -504,16 +504,20 @@ func (gui *Gui) SetKeybinding(binding *types.Binding) error {
 func (gui *Gui) SetMouseKeybinding(binding *gocui.ViewMouseBinding) error {
 	baseHandler := binding.Handler
 	newHandler := func(opts gocui.ViewMouseBindingOpts) error {
+		if gui.helpers.Confirmation.IsPopupPanelFocused() && gui.currentViewName() != binding.ViewName &&
+			!gocui.IsMouseScrollKey(opts.Key) {
 			// we ignore click events on views that aren't popup panels, when a popup panel is focused.
 			// Unless both the current view and the clicked-on view are either commit message or commit
-		// description, because we want to allow switching between those two views by clicking.
+			// description, or a confirmation and the suggestions view, because we want to allow switching
-		isCommitMessageView := func(viewName string) bool {
+			// between those two views by clicking.
-			return viewName == "commitMessage" || viewName == "commitDescription"
+			isCommitMessageOrSuggestionsView := func(viewName string) bool {
+				return viewName == "commitMessage" || viewName == "commitDescription" ||
+					viewName == "confirmation" || viewName == "suggestions"
 			}
-		if gui.helpers.Confirmation.IsPopupPanelFocused() && gui.currentViewName() != binding.ViewName &&
+			if !isCommitMessageOrSuggestionsView(gui.currentViewName()) || !isCommitMessageOrSuggestionsView(binding.ViewName) {
-			(!isCommitMessageView(gui.currentViewName()) || !isCommitMessageView(binding.ViewName)) {
 				return nil
 			}
+		}
 
 		return baseHandler(opts)
 	}