Add a "Show full diff" checkbox to the filtering menu

It is only visible when filtering by path.

pkg/commands/git_commands/commit.go

@@ -271,7 +271,7 @@ func (self *CommitCommands) ShowCmdObj(hash string, filterPath string) *oscomman
 		Arg(hash).
 		ArgIf(self.AppState.IgnoreWhitespaceInDiffView, "--ignore-all-space").
 		Arg(fmt.Sprintf("--find-renames=%d%%", self.AppState.RenameSimilarityThreshold)).
-		ArgIf(filterPath != "", "--", filterPath).
+		ArgIf(filterPath != "" && !self.AppState.ShowFullDiffInFilterByPathMode, "--", filterPath).
 		Dir(self.repoPaths.worktreePath).
 		ToArgv()
 

pkg/config/app_config.go

@@ -691,6 +691,8 @@ type AppState struct {
 	// This determines whether the git graph is rendered in the commits panel
 	// One of 'always' | 'never' | 'when-maximised'
 	GitLogShowGraph string
+
+	ShowFullDiffInFilterByPathMode bool
 }
 
 func getDefaultAppState() *AppState {

pkg/gui/controllers/filtering_menu_action.go

@@ -92,6 +92,19 @@ func (self *FilteringMenuAction) Call() error {
 		Tooltip: tooltip,
 	})
 
+	if path := self.c.Modes().Filtering.GetPath(); path != "" {
+		menuItems = append(menuItems, &types.MenuItem{
+			Label: "Show full diff", // TODO: i18n (and tooltip?)
+			Key:   'f',
+			OnPress: func() error {
+				self.c.AppState.ShowFullDiffInFilterByPathMode = !self.c.AppState.ShowFullDiffInFilterByPathMode
+				self.c.SaveAppStateAndLogError()
+				return self.c.Refresh(types.RefreshOptions{Scope: []types.RefreshableView{types.COMMITS}})
+			},
+			Widget: types.MakeMenuCheckBox(self.c.AppState.ShowFullDiffInFilterByPathMode),
+		})
+	}
+
 	if self.c.Modes().Filtering.Active() {
 		menuItems = append(menuItems, &types.MenuItem{
 			Label:   self.c.Tr.ExitFilterMode,

pkg/gui/controllers/helpers/diff_helper.go

@@ -57,7 +57,7 @@ func (self *DiffHelper) GetUpdateTaskForRenderingCommitsDiff(commit *models.Comm
 		from, to := refRange.From, refRange.To
 		args := []string{from.ParentRefName(), to.RefName(), "--stat", "-p"}
 		args = append(args, "--")
-		if path := self.c.Modes().Filtering.GetPath(); path != "" {
+		if path := self.c.Modes().Filtering.GetPath(); path != "" && !self.c.AppState.ShowFullDiffInFilterByPathMode {
 			args = append(args, path)
 		}
 		cmdObj := self.c.Git().Diff.DiffCmdObj(args)