Hide buffer info message when screen is too small

config/config.yml

@@ -5,5 +5,6 @@ selected_style_fallback: "default-fallback" # Style for 8-color capable terminal
 # Other
 show_top_menu: true
 show_line_index: true
+extend_line_index: false # Extend line index to the bottom of the screen
 buffer_info_message: "File: %f Cursor: (%x, %y, %p) Chars: %c"
 tab_indentation: 4 # Length of tab characters

config/keybindings.yml

@@ -37,4 +37,7 @@ keybindings:
     command: "menu-edit"
   - keybinding: "F3"
     cursor_modes: ["buffer","dropdown"]
-    command: "menu-buffers"
+    command: "menu-buffers"
+  - keybinding: "Ctrl-E"
+    cursor_modes: ["buffer"]
+    command: "execute"

src/buffer.go

@@ -98,6 +98,16 @@ func (buffer *Buffer) Load() error {
 		return nil
 	}
 
+	// Replace tilde with home directory
+	if strings.HasPrefix(buffer.filename, "~/") {
+		homedir, err := os.UserHomeDir()
+		if err != nil {
+			return err
+		}
+
+		buffer.filename = filepath.Join(homedir, buffer.filename[2:])
+	}
+
 	content, err := os.ReadFile(buffer.filename)
 	if err != nil {
 		return err
@@ -113,6 +123,16 @@ func (buffer *Buffer) Save() error {
 		return nil
 	}
 
+	// Replace tilde with home directory
+	if strings.HasPrefix(buffer.filename, "~/") {
+		homedir, err := os.UserHomeDir()
+		if err != nil {
+			return err
+		}
+
+		buffer.filename = filepath.Join(homedir, buffer.filename[2:])
+	}
+
 	// Append new line character at end of buffer contents if not present
 	if buffer.Contents[len(buffer.Contents)-1] != '\n' {
 		buffer.Contents += "\n"
@@ -164,6 +184,70 @@ func (buffer *Buffer) GetSelectedText() string {
 	}
 }
 
+func (buffer *Buffer) CopyText() (string, int) {
+	if buffer.Selection == nil {
+		// Copy line
+		copiedText := ""
+
+		// Add current letter to copied text
+		if buffer.CursorPos < len(buffer.Contents) {
+			copiedText = string(buffer.Contents[buffer.CursorPos])
+		}
+
+		// Find end of line
+		for i := buffer.CursorPos + 1; i < len(buffer.Contents); i++ {
+			currentLetter := buffer.Contents[i]
+
+			copiedText += string(currentLetter)
+			if currentLetter == '\n' {
+				break
+			}
+		}
+
+		// Find start of line
+		for i := buffer.CursorPos - 1; i >= 0; i-- {
+			currentLetter := buffer.Contents[i]
+			if currentLetter != '\n' {
+				copiedText = string(currentLetter) + copiedText
+			} else {
+				break
+			}
+		}
+
+		return copiedText, 0
+	} else {
+		// Copy selection
+		return buffer.GetSelectedText(), 1
+	}
+}
+
+func (buffer *Buffer) PasteText(window *Window, text string) {
+	str := buffer.Contents
+
+	// Remove selected text
+	if buffer.Selection != nil {
+		edge1, edge2 := buffer.GetSelectionEdges()
+		if edge2 == len(buffer.Contents) {
+			edge2 = len(buffer.Contents) - 1
+		}
+
+		str = str[:edge1] + str[edge2+1:]
+		buffer.Contents = str
+		window.SetCursorPos(edge1)
+		buffer.Selection = nil
+	}
+
+	index := buffer.CursorPos
+
+	if index == len(str) {
+		str += text
+	} else {
+		str = str[:index] + text + str[index:]
+	}
+	buffer.Contents = str
+	window.SetCursorPos(buffer.CursorPos + len(text))
+}
+
 func GetOpenFileBuffer(filename string) *Buffer {
 	// Replace tilde with home directory
 	if filename != "~" && strings.HasPrefix(filename, "~/") {

src/command.go

@@ -21,14 +21,16 @@ func initCommands() {
 	copyCmd := Command{
 		cmd: "copy",
 		run: func(window *Window, args ...string) {
-			if window.CurrentBuffer.Selection == nil {
-				// Copy line
-				_, line := window.GetCursorPos2D()
-				window.Clipboard = strings.SplitAfter(window.CurrentBuffer.Contents, "\n")[line]
+			// Copy text from buffer
+			copiedText, copyingMethod := window.CurrentBuffer.CopyText()
+
+			// Put copied text to clipboard
+			window.Clipboard = copiedText
+
+			// Send appropriate message depending on copying method
+			if copyingMethod == 0 {
 				PrintMessage(window, "Copied line to clipboard.")
 			} else {
-				// Copy selection
-				window.Clipboard = window.CurrentBuffer.GetSelectedText()
 				PrintMessage(window, "Copied selection to clipboard.")
 			}
 		},
@@ -37,16 +39,10 @@ func initCommands() {
 	pasteCmd := Command{
 		cmd: "paste",
 		run: func(window *Window, args ...string) {
-			str := window.CurrentBuffer.Contents
-			index := window.CurrentBuffer.CursorPos
-
-			if index == len(str) {
-				str += window.Clipboard
-			} else {
-				str = str[:index] + window.Clipboard + str[index:]
+			if window.Clipboard != "" {
+				window.CurrentBuffer.PasteText(window, window.Clipboard)
+				PrintMessage(window, "Pasted text to buffer.")
 			}
-			window.CurrentBuffer.Contents = str
-			window.SetCursorPos(window.CurrentBuffer.CursorPos + len(window.Clipboard))
 		},
 	}
 
@@ -206,6 +202,66 @@ func initCommands() {
 		},
 	}
 
+	toggleTopBar := Command{
+		cmd: "toggle-top-bar",
+		run: func(window *Window, args ...string) {
+			window.ShowTopMenu = !window.ShowTopMenu
+		},
+	}
+
+	toggleLineIndex := Command{
+		cmd: "toggle-line-index",
+		run: func(window *Window, args ...string) {
+			window.ShowLineIndex = !window.ShowLineIndex
+		},
+	}
+
+	setStyleCmd := Command{
+		cmd: "set-style",
+		run: func(window *Window, args ...string) {
+			if len(args) >= 1 {
+				input := args[0]
+
+				if input == "" {
+					return
+				}
+
+				if _, ok := AvailableStyles[input]; !ok {
+					PrintMessage(window, fmt.Sprintf("Could not set style to '%s'", input))
+					return
+				}
+
+				if ok := SetCurrentStyle(window.screen, input); ok {
+					PrintMessage(window, fmt.Sprintf("Setting style to '%s'", input))
+				} else {
+					PrintMessage(window, fmt.Sprintf("Could not set style to '%s'", input))
+				}
+
+				return
+			}
+
+			inputChannel := RequestInput(window, "Style to switch to:", "")
+			go func() {
+				input := <-inputChannel
+
+				if input == "" {
+					return
+				}
+
+				if _, ok := AvailableStyles[input]; !ok {
+					PrintMessage(window, fmt.Sprintf("Could not set style to '%s'", input))
+					return
+				}
+
+				if ok := SetCurrentStyle(window.screen, input); ok {
+					PrintMessage(window, fmt.Sprintf("Setting style to '%s'", input))
+				} else {
+					PrintMessage(window, fmt.Sprintf("Could not set style to '%s'", input))
+				}
+			}()
+		},
+	}
+
 	menuFileCmd := Command{
 		cmd: "menu-file",
 		run: func(window *Window, args ...string) {
@@ -250,6 +306,47 @@ func initCommands() {
 		},
 	}
 
+	executeCmd := Command{
+		cmd: "execute",
+		run: func(window *Window, args ...string) {
+			inputChannel := RequestInput(window, "Run:", "")
+
+			go func() {
+				input := strings.TrimSpace(<-inputChannel)
+
+				if input == "" {
+					return
+				}
+
+				var arguments []string
+
+				builder := &strings.Builder{}
+				quoted := false
+				for _, r := range input {
+					if r == '"' {
+						quoted = !quoted
+					} else if !quoted && r == ' ' {
+						arguments = append(arguments, builder.String())
+						builder.Reset()
+					} else {
+						builder.WriteRune(r)
+					}
+				}
+				if builder.Len() > 0 {
+					arguments = append(arguments, builder.String())
+				}
+
+				window.CursorMode = CursorModeBuffer
+
+				if len(arguments) == 1 {
+					RunCommand(window, arguments[0])
+				} else {
+					RunCommand(window, arguments[0], arguments[1:]...)
+				}
+			}()
+		},
+	}
+
 	// Register commands
 	commands["copy"] = &copyCmd
 	commands["paste"] = &pasteCmd
@@ -260,10 +357,14 @@ func initCommands() {
 	commands["next-buffer"] = &nextBufferCmd
 	commands["new-buffer"] = &newBufferCmd
 	commands["close-buffer"] = &closeBufferCmd
+	commands["toggle-top-bar"] = &toggleTopBar
+	commands["toggle-line-index"] = &toggleLineIndex
+	commands["set-style"] = &setStyleCmd
 	commands["menu-file"] = &menuFileCmd
 	commands["menu-edit"] = &menuEditCmd
 	commands["menu-buffers"] = &menuBuffersCmd
 	commands["quit"] = &quitCmd
+	commands["execute"] = &executeCmd
 }
 
 func RunCommand(window *Window, cmd string, args ...string) bool {

src/config.go

@@ -12,6 +12,7 @@ type TyperConfig struct {
 	FallbackStyle     string `yaml:"fallback_style,omitempty"`
 	ShowTopMenu       bool   `yaml:"show_top_menu,omitempty"`
 	ShowLineIndex     bool   `yaml:"show_line_index,omitempty"`
+	ExtendLineIndex   bool   `yaml:"extend_line_index,omitempty"`
 	BufferInfoMessage string `yaml:"buffer_info_message,omitempty"`
 	TabIndentation    int    `yaml:"tab_indentation,omitempty"`
 }
@@ -24,6 +25,7 @@ func readConfig() {
 		FallbackStyle:     "default-fallback",
 		ShowTopMenu:       true,
 		ShowLineIndex:     true,
+		ExtendLineIndex:   false,
 		BufferInfoMessage: "File: %f Cursor: (%x, %y, %p) Chars: %c",
 		TabIndentation:    4,
 	}

src/line_index.go

@@ -12,16 +12,22 @@ func drawLineIndex(window *Window) {
 
 	lineIndexStyle := tcell.StyleDefault.Background(CurrentStyle.LineIndexBg).Foreground(CurrentStyle.LineIndexFg)
 
-	_, sizeY := screen.Size()
-
-	y := 0
-	if window.ShowTopMenu {
-		y = 1
-	}
-
 	lineIndexSize := getLineIndexSize(window)
 
-	for lineIndex := 1 + buffer.OffsetY; lineIndex <= strings.Count(buffer.Contents, "\n")+1 && lineIndex < sizeY+buffer.OffsetY; lineIndex++ {
+	_, bufferY1, _, bufferY2 := window.GetTextAreaDimensions()
+
+	lineIndex := 1 + buffer.OffsetY
+	for y := bufferY1; y <= bufferY2; y++ {
+		if lineIndex > strings.Count(buffer.Contents, "\n")+1 {
+			if Config.ExtendLineIndex {
+				for x := 0; x < lineIndexSize; x++ {
+					screen.SetContent(x, y, ' ', nil, lineIndexStyle)
+				}
+				continue
+			} else {
+				break
+			}
+		}
 
 		for x := 0; x < lineIndexSize; x++ {
 			screen.SetContent(x, y, ' ', nil, lineIndexStyle)
@@ -30,7 +36,8 @@ func drawLineIndex(window *Window) {
 		text := strconv.Itoa(lineIndex)
 
 		drawText(screen, lineIndexSize-len(text)-1, y, lineIndexSize, y, lineIndexStyle, text)
-		y++
+
+		lineIndex++
 	}
 }
 

src/main.go

@@ -38,8 +38,11 @@ func main() {
 		}
 	}
 
-	for window.screen != nil {
+	for !window.closed {
 		window.Draw()
+		window.ProcessEvents()
 	}
 
+	window.screen.Fini()
+	window.screen = nil
 }

src/style.go

@@ -46,8 +46,29 @@ type typerStyleYaml struct {
 	Colors map[string]string `yaml:"colors"`
 }
 
+var FallbackStyle = TyperStyle{
+	Name:        "fallback",
+	Description: "Fallback style",
+	StyleType:   "8-color",
+
+	BufferAreaBg:  tcell.ColorBlack,
+	BufferAreaFg:  tcell.ColorWhite,
+	BufferAreaSel: tcell.ColorNavy,
+	TopMenuBg:     tcell.ColorWhite,
+	TopMenuFg:     tcell.ColorBlack,
+	DropdownBg:    tcell.ColorWhite,
+	DropdownFg:    tcell.ColorBlack,
+	DropdownSel:   tcell.ColorNavy,
+	LineIndexBg:   tcell.ColorWhite,
+	LineIndexFg:   tcell.ColorBlack,
+	MessageBarBg:  tcell.ColorWhite,
+	MessageBarFg:  tcell.ColorBlack,
+	InputBarBg:    tcell.ColorWhite,
+	InputBarFg:    tcell.ColorBlack,
+}
+
 var AvailableStyles = make(map[string]TyperStyle)
-var CurrentStyle TyperStyle
+var CurrentStyle = FallbackStyle
 
 func readStyles() {
 	homeDir, err := os.UserHomeDir()
@@ -145,7 +166,7 @@ func readStyleYamlFile(filepath string) (TyperStyle, error) {
 	return style, nil
 }
 
-func SetCurrentStyle(screen tcell.Screen) {
+func SetCurrentStyle(screen tcell.Screen, styleName string) bool {
 	availableTypes := make([]string, 1)
 	availableTypes[0] = "8-color"
 	if screen.Colors() >= 16 {
@@ -158,30 +179,13 @@ func SetCurrentStyle(screen tcell.Screen) {
 		availableTypes = append(availableTypes, "true-color")
 	}
 
-	if style, ok := AvailableStyles[Config.SelectedStyle]; ok && slices.Index(availableTypes, style.StyleType) != -1 {
+	if style, ok := AvailableStyles[styleName]; ok && slices.Index(availableTypes, style.StyleType) != -1 {
 		CurrentStyle = style
-	} else if style, ok := AvailableStyles[Config.FallbackStyle]; ok {
-		CurrentStyle = style
-	} else {
-		CurrentStyle = TyperStyle{
-			Name:        "fallback",
-			Description: "Fallback style",
-			StyleType:   "8-color",
 
-			BufferAreaBg:  tcell.ColorBlack,
-			BufferAreaFg:  tcell.ColorWhite,
-			BufferAreaSel: tcell.ColorNavy,
-			TopMenuBg:     tcell.ColorWhite,
-			TopMenuFg:     tcell.ColorBlack,
-			DropdownBg:    tcell.ColorWhite,
-			DropdownFg:    tcell.ColorBlack,
-			DropdownSel:   tcell.ColorNavy,
-			LineIndexBg:   tcell.ColorWhite,
-			LineIndexFg:   tcell.ColorBlack,
-			MessageBarBg:  tcell.ColorWhite,
-			MessageBarFg:  tcell.ColorBlack,
-			InputBarBg:    tcell.ColorWhite,
-			InputBarFg:    tcell.ColorBlack,
-		}
+		screen.SetStyle(tcell.StyleDefault.Foreground(CurrentStyle.BufferAreaFg).Background(CurrentStyle.BufferAreaBg))
+		screen.Sync()
+
+		return true
 	}
+	return false
 }

src/top_menu.go

@@ -123,7 +123,9 @@ func drawTopMenu(window *Window) {
 
 	// Draw buffer info
 	bufferInfoMsg := getBufferInfoMsg(window)
-	drawText(screen, sizeX-len(bufferInfoMsg)-1, 0, sizeX-1, 0, topMenuStyle, bufferInfoMsg)
+	if sizeX-len(bufferInfoMsg)-1 > currentX+2 {
+		drawText(screen, sizeX-len(bufferInfoMsg)-1, 0, sizeX-1, 0, topMenuStyle, bufferInfoMsg)
+	}
 }
 
 func getBufferInfoMsg(window *Window) string {

src/window.go

@@ -36,6 +36,8 @@ type Window struct {
 	CurrentBuffer *Buffer
 
 	screen tcell.Screen
+
+	closed bool
 }
 
 var mouseHeld = false
@@ -70,16 +72,22 @@ func CreateWindow() (*Window, error) {
 		log.Fatalf("Failed to initialize screen: %s", err)
 	}
 
-	// Set screen style
-	SetCurrentStyle(screen)
-	screen.SetStyle(tcell.StyleDefault.Foreground(CurrentStyle.BufferAreaFg).Background(CurrentStyle.BufferAreaBg))
-
 	// Enable mouse
 	screen.EnableMouse()
 
 	// Set window screen field
 	window.screen = screen
 
+	// Try to set screen style to selected one
+	if ok := SetCurrentStyle(screen, Config.SelectedStyle); !ok {
+		// Try to set screen style to selected fallback one
+		if ok := SetCurrentStyle(screen, Config.FallbackStyle); !ok {
+			// Use hard-coded fallback style
+			screen.SetStyle(tcell.StyleDefault.Foreground(CurrentStyle.BufferAreaFg).Background(CurrentStyle.BufferAreaBg))
+			PrintMessage(&window, "Could not set style either to selected one nor to fallback one!")
+		}
+	}
+
 	// Initialize top menu
 	initTopMenu()
 
@@ -126,7 +134,9 @@ func (window *Window) Draw() {
 
 	// Update screen
 	window.screen.Show()
+}
 
+func (window *Window) ProcessEvents() {
 	// Poll event
 	ev := window.screen.PollEvent()
 
@@ -136,13 +146,13 @@ func (window *Window) Draw() {
 		window.screen.Sync()
 		window.SyncBufferOffset()
 	case *tcell.EventMouse:
-		window.mouseInput(ev)
+		window.handleMouseInput(ev)
 	case *tcell.EventKey:
-		window.input(ev)
+		window.handleKeyInput(ev)
 	}
 }
 
-func (window *Window) input(ev *tcell.EventKey) {
+func (window *Window) handleKeyInput(ev *tcell.EventKey) {
 	if ev.Key() == tcell.KeyRight { // Navigation Keys
 		if window.CursorMode == CursorModeBuffer {
 			// Get original cursor position
@@ -515,7 +525,7 @@ func (window *Window) input(ev *tcell.EventKey) {
 	}
 }
 
-func (window *Window) mouseInput(ev *tcell.EventMouse) {
+func (window *Window) handleMouseInput(ev *tcell.EventMouse) {
 	mouseX, mouseY := ev.Position()
 
 	// Left click was pressed
@@ -635,8 +645,11 @@ func (window *Window) mouseInput(ev *tcell.EventMouse) {
 }
 
 func (window *Window) Close() {
-	window.screen.Fini()
-	window.screen = nil
+	window.closed = true
+	err := window.screen.PostEvent(tcell.NewEventInterrupt(nil))
+	if err != nil {
+		return
+	}
 }
 
 func (window *Window) GetTextAreaDimensions() (int, int, int, int) {