Allow setting default screenMode (jesseduffield#421)

docs/Config.md

@@ -36,6 +36,8 @@ gui:
   # When true, increases vertical space used by focused side panel,
   # creating an accordion effect
   expandFocusedSidePanel: false
+  # Determines which screen mode will be used on startup
+  screenMode: "normal" # one of 'normal' | 'half' | 'fullscreen'
 logs:
   timestamps: false
   since: '60m' # set to '' to show all logs

pkg/config/app_config.go

@@ -130,6 +130,9 @@ type GuiConfig struct {
 	// When true, increases vertical space used by focused side panel,
 	// creating an accordion effect
 	ExpandFocusedSidePanel bool `yaml:"expandFocusedSidePanel"`
+
+	// ScreenMode allow user to specify which screen mode will be used on startup
+	ScreenMode string `yaml:"screenMode,omitempty"`
 }
 
 // CommandTemplatesConfig determines what commands actually get called when we
@@ -362,6 +365,7 @@ func GetDefaultConfig() UserConfig {
 			SidePanelWidth:         0.3333,
 			ShowBottomLine:         true,
 			ExpandFocusedSidePanel: false,
+			ScreenMode:             "normal",
 		},
 		ConfirmOnQuit: false,
 		Logs: LogsConfig{

pkg/gui/gui.go

@@ -114,6 +114,19 @@ const (
 	SCREEN_FULL
 )
 
+func getScreenMode(config *config.AppConfig) WindowMaximisation {
+	switch config.UserConfig.Gui.ScreenMode {
+	case "normal":
+		return SCREEN_NORMAL
+	case "half":
+		return SCREEN_HALF
+	case "fullscreen":
+		return SCREEN_FULL
+	default:
+		return SCREEN_NORMAL
+	}
+}
+
 // NewGui builds a new gui handler
 func NewGui(log *logrus.Entry, dockerCommand *commands.DockerCommand, oSCommand *commands.OSCommand, tr *i18n.TranslationSet, config *config.AppConfig, errorChan chan error) (*Gui, error) {
 	initialState := guiState{
@@ -126,6 +139,7 @@ func NewGui(log *logrus.Entry, dockerCommand *commands.DockerCommand, oSCommand
 		ViewStack: []string{},
 
 		ShowExitedContainers: true,
+		ScreenMode:           getScreenMode(config),
 	}
 
 	gui := &Gui{