Add border config (#2344)

Co-authored-by: yk-kd <yosuke.komada@gmail.com>

docs/Config.md

@@ -63,6 +63,7 @@ gui:
   commandLogSize: 8
   splitDiff: 'auto' # one of 'auto' | 'always'
   skipRewordInEditorWarning: false # for skipping the confirmation before launching the reword editor
+  border: 'single' # one of 'single' | 'double' | 'rounded' | 'hidden'
 git:
   paging:
     colorArg: always

pkg/config/user_config.go

@@ -52,6 +52,7 @@ type GuiConfig struct {
 	SplitDiff                 string             `yaml:"splitDiff"`
 	SkipRewordInEditorWarning bool               `yaml:"skipRewordInEditorWarning"`
 	WindowSize                string             `yaml:"windowSize"`
+	Border                    string             `yaml:"border"`
 }
 
 type ThemeConfig struct {
@@ -382,6 +383,7 @@ func GetDefaultConfig() *UserConfig {
 			CommandLogSize:            8,
 			SplitDiff:                 "auto",
 			SkipRewordInEditorWarning: false,
+			Border:                    "single",
 		},
 		Git: GitConfig{
 			Paging: PagingConfig{

pkg/gui/views.go

@@ -114,12 +114,23 @@ func (gui *Gui) windowForView(viewName string) string {
 }
 
 func (gui *Gui) createAllViews() error {
+	frameRunes := []rune{'─', '│', '┌', '┐', '└', '┘'}
+	switch gui.c.UserConfig.Gui.Border {
+	case "double":
+		frameRunes = []rune{'═', '║', '╔', '╗', '╚', '╝'}
+	case "rounded":
+		frameRunes = []rune{'─', '│', '╭', '╮', '╰', '╯'}
+	case "hidden":
+		frameRunes = []rune{' ', ' ', ' ', ' ', ' ', ' '}
+	}
+
 	var err error
 	for _, mapping := range gui.orderedViewNameMappings() {
 		*mapping.viewPtr, err = gui.prepareView(mapping.name)
 		if err != nil && !gocui.IsUnknownView(err) {
 			return err
 		}
+		(*mapping.viewPtr).FrameRunes = frameRunes
 	}
 
 	gui.Views.Options.FgColor = theme.OptionsColor