Allow focussing the main view

In this commit this is only possible by pressing '0' in a side panel; we'll add
mouse clicking later in the branch.

Also, you can't really do anything in the focused view except press escape to
leave it again. We'll add some more functionality in a following commit.

pkg/config/user_config.go

@@ -395,6 +395,7 @@ type KeybindingUniversalConfig struct {
 	NextBlockAlt2                     string   `yaml:"nextBlock-alt2"`
 	PrevBlockAlt2                     string   `yaml:"prevBlock-alt2"`
 	JumpToBlock                       []string `yaml:"jumpToBlock"`
+	FocusMainView                     string   `yaml:"focusMainView"`
 	NextMatch                         string   `yaml:"nextMatch"`
 	PrevMatch                         string   `yaml:"prevMatch"`
 	StartSearch                       string   `yaml:"startSearch"`
@@ -876,6 +877,7 @@ func GetDefaultConfig() *UserConfig {
 				PrevBlockAlt2:                     "<backtab>",
 				NextBlockAlt2:                     "<tab>",
 				JumpToBlock:                       []string{"1", "2", "3", "4", "5"},
+				FocusMainView:                     "0",
 				NextMatch:                         "n",
 				PrevMatch:                         "N",
 				StartSearch:                       "/",

pkg/gui/context/main_context.go

@@ -17,11 +17,12 @@ func NewMainContext(
 	ctx := &MainContext{
 		SimpleContext: NewSimpleContext(
 			NewBaseContext(NewBaseContextOpts{
-				Kind:       types.MAIN_CONTEXT,
-				View:       view,
-				WindowName: windowName,
-				Key:        key,
-				Focusable:  false,
+				Kind:             types.MAIN_CONTEXT,
+				View:             view,
+				WindowName:       windowName,
+				Key:              key,
+				Focusable:        true,
+				HighlightOnFocus: false,
 			})),
 	}
 

pkg/gui/controllers.go

@@ -189,6 +189,8 @@ func (gui *Gui) resetHelpersAndControllers() {
 	patchExplorerControllerFactory := controllers.NewPatchExplorerControllerFactory(common)
 	stagingController := controllers.NewStagingController(common, gui.State.Contexts.Staging, gui.State.Contexts.StagingSecondary, false)
 	stagingSecondaryController := controllers.NewStagingController(common, gui.State.Contexts.StagingSecondary, gui.State.Contexts.Staging, true)
+	mainViewController := controllers.NewMainViewController(common, gui.State.Contexts.Normal, gui.State.Contexts.NormalSecondary)
+	secondaryViewController := controllers.NewMainViewController(common, gui.State.Contexts.NormalSecondary, gui.State.Contexts.Normal)
 	patchBuildingController := controllers.NewPatchBuildingController(common)
 	snakeController := controllers.NewSnakeController(common)
 	reflogCommitsController := controllers.NewReflogCommitsController(common)
@@ -263,6 +265,22 @@ func (gui *Gui) resetHelpersAndControllers() {
 		))
 	}
 
+	for _, context := range []types.Context{
+		gui.State.Contexts.Files,
+		gui.State.Contexts.Branches,
+		gui.State.Contexts.RemoteBranches,
+		gui.State.Contexts.Tags,
+		gui.State.Contexts.LocalCommits,
+		gui.State.Contexts.ReflogCommits,
+		gui.State.Contexts.SubCommits,
+		gui.State.Contexts.CommitFiles,
+		gui.State.Contexts.Stash,
+	} {
+		controllers.AttachControllers(context, controllers.NewSwitchToFocusedMainViewController(
+			common, context,
+		))
+	}
+
 	for _, context := range []controllers.ContainsCommits{
 		gui.State.Contexts.LocalCommits,
 		gui.State.Contexts.ReflogCommits,
@@ -306,6 +324,16 @@ func (gui *Gui) resetHelpersAndControllers() {
 		mergeConflictsController,
 	)
 
+	controllers.AttachControllers(gui.State.Contexts.Normal,
+		mainViewController,
+		verticalScrollControllerFactory.Create(gui.State.Contexts.Normal),
+	)
+
+	controllers.AttachControllers(gui.State.Contexts.NormalSecondary,
+		secondaryViewController,
+		verticalScrollControllerFactory.Create(gui.State.Contexts.NormalSecondary),
+	)
+
 	controllers.AttachControllers(gui.State.Contexts.Files,
 		filesController,
 	)

pkg/gui/controllers/main_view_controller.go

@@ -0,0 +1,63 @@
+package controllers
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/gui/types"
+)
+
+type MainViewController struct {
+	baseController
+	c *ControllerCommon
+
+	context      types.Context
+	otherContext types.Context
+}
+
+var _ types.IController = &MainViewController{}
+
+func NewMainViewController(
+	c *ControllerCommon,
+	context types.Context,
+	otherContext types.Context,
+) *MainViewController {
+	return &MainViewController{
+		baseController: baseController{},
+		c:              c,
+		context:        context,
+		otherContext:   otherContext,
+	}
+}
+
+func (self *MainViewController) GetKeybindings(opts types.KeybindingsOpts) []*types.Binding {
+	return []*types.Binding{
+		{
+			Key:             opts.GetKey(opts.Config.Universal.TogglePanel),
+			Handler:         self.togglePanel,
+			Description:     self.c.Tr.ToggleStagingView,
+			Tooltip:         self.c.Tr.ToggleStagingViewTooltip,
+			DisplayOnScreen: true,
+		},
+		{
+			Key:         opts.GetKey(opts.Config.Universal.Return),
+			Handler:     self.escape,
+			Description: self.c.Tr.ExitFocusedMainView,
+		},
+	}
+}
+
+func (self *MainViewController) Context() types.Context {
+	return self.context
+}
+
+func (self *MainViewController) togglePanel() error {
+	if self.otherContext.GetView().Visible {
+		self.otherContext.SetParentContext(self.context.GetParentContext())
+		self.c.Context().Push(self.otherContext, types.OnFocusOpts{})
+	}
+
+	return nil
+}
+
+func (self *MainViewController) escape() error {
+	self.c.Context().Pop()
+	return nil
+}

pkg/gui/controllers/switch_to_focused_main_view_controller.go

@@ -0,0 +1,49 @@
+package controllers
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/gui/types"
+)
+
+// This controller is for all contexts that can focus their main view.
+
+var _ types.IController = &SwitchToFocusedMainViewController{}
+
+type SwitchToFocusedMainViewController struct {
+	baseController
+	c       *ControllerCommon
+	context types.Context
+}
+
+func NewSwitchToFocusedMainViewController(
+	c *ControllerCommon,
+	context types.Context,
+) *SwitchToFocusedMainViewController {
+	return &SwitchToFocusedMainViewController{
+		baseController: baseController{},
+		c:              c,
+		context:        context,
+	}
+}
+
+func (self *SwitchToFocusedMainViewController) GetKeybindings(opts types.KeybindingsOpts) []*types.Binding {
+	bindings := []*types.Binding{
+		{
+			Key:         opts.GetKey(opts.Config.Universal.FocusMainView),
+			Handler:     self.handleFocusMainView,
+			Description: self.c.Tr.FocusMainView,
+		},
+	}
+
+	return bindings
+}
+
+func (self *SwitchToFocusedMainViewController) Context() types.Context {
+	return self.context
+}
+
+func (self *SwitchToFocusedMainViewController) handleFocusMainView() error {
+	mainViewContext := self.c.Helpers().Window.GetContextForWindow("main")
+	mainViewContext.SetParentContext(self.context)
+	self.c.Context().Push(mainViewContext, types.OnFocusOpts{})
+	return nil
+}

pkg/i18n/english.go

@@ -264,6 +264,7 @@ type TranslationSet struct {
 	IgnoreFile                            string
 	ExcludeFile                           string
 	RefreshFiles                          string
+	FocusMainView                         string
 	Merge                                 string
 	RegularMerge                          string
 	MergeBranchTooltip                    string
@@ -508,6 +509,7 @@ type TranslationSet struct {
 	EnterCommitFile                       string
 	EnterCommitFileTooltip                string
 	ExitCustomPatchBuilder                string
+	ExitFocusedMainView                   string
 	EnterUpstream                         string
 	InvalidUpstream                       string
 	ReturnToRemotesList                   string
@@ -1328,6 +1330,7 @@ func EnglishTranslationSet() *TranslationSet {
 		IgnoreFile:                           `Add to .gitignore`,
 		ExcludeFile:                          `Add to .git/info/exclude`,
 		RefreshFiles:                         `Refresh files`,
+		FocusMainView:                        "Focus main view",
 		Merge:                                `Merge`,
 		RegularMerge:                         "Regular merge",
 		MergeBranchTooltip:                   "View options for merging the selected item into the current branch (regular merge, squash merge)",
@@ -1581,6 +1584,7 @@ func EnglishTranslationSet() *TranslationSet {
 		EnterCommitFile:                      "Enter file / Toggle directory collapsed",
 		EnterCommitFileTooltip:               "If a file is selected, enter the file so that you can add/remove individual lines to the custom patch. If a directory is selected, toggle the directory.",
 		ExitCustomPatchBuilder:               `Exit custom patch builder`,
+		ExitFocusedMainView:                  "Exit back to side panel",
 		EnterUpstream:                        `Enter upstream as '<remote> <branchname>'`,
 		InvalidUpstream:                      "Invalid upstream. Must be in the format '<remote> <branchname>'",
 		ReturnToRemotesList:                  `Return to remotes list`,