Did a lot of work off-repo, basically init

ui/inputfield.go

@@ -0,0 +1,129 @@
+package ui
+
+import "github.com/gdamore/tcell/v2"
+
+// An InputField is a single-line input box.
+type InputField struct {
+	Text string
+
+	cursorPos     int
+	scrollPos     int
+	x, y          int
+	width, height int
+	focused       bool
+	screen        *tcell.Screen
+
+	Theme *Theme
+}
+
+func NewInputField(screen *tcell.Screen, placeholder string, theme *Theme) *InputField {
+	return &InputField{
+		Text:  placeholder,
+		screen: screen,
+		Theme: theme,
+	}
+}
+
+func (f *InputField) GetCursorPos() int {
+	return f.cursorPos
+}
+
+// SetCursorPos sets the cursor position offset. Offset is clamped to possible values.
+// The InputField is scrolled to show the new cursor position.
+func (f *InputField) SetCursorPos(offset int) {
+	// Clamping
+	if offset < 0 {
+		offset = 0
+	} else if offset > len(f.Text) {
+		offset = len(f.Text)
+	}
+
+	// Scrolling
+	if offset >= f.scrollPos+f.width-2 { // If cursor position is out of view to the right...
+		f.scrollPos = offset - f.width+2 // Scroll just enough to view that column
+	} else if offset < f.scrollPos { // If cursor position is out of view to the left...
+		f.scrollPos = offset
+	}
+
+	f.cursorPos = offset
+	if f.focused {
+		(*f.screen).ShowCursor(f.x+offset-f.scrollPos+1, f.y)
+	}
+}
+
+func (f *InputField) Delete(forward bool) {
+	if forward {
+		//if f.cursorPos 
+	} else {
+
+	}
+}
+
+func (f *InputField) Draw(s tcell.Screen) {
+	style := f.Theme.GetOrDefault("InputField")
+
+	DrawRect(s, f.x, f.y, f.width, f.height, ' ', style) // Draw background
+	s.SetContent(f.x, f.y, '[', nil, style)
+	s.SetContent(f.x+f.width-1, f.y, ']', nil, style)
+
+	if len(f.Text) > 0 {
+		endPos := f.scrollPos + Min(len(f.Text)-f.scrollPos, f.width-2)
+		DrawStr(s, f.x+1, f.y, f.Text[f.scrollPos:endPos], style) // Draw text
+	}
+
+	// Update cursor
+	f.SetCursorPos(f.cursorPos)
+}
+
+func (f *InputField) SetFocused(v bool) {
+	f.focused = v
+	if v {
+		f.SetCursorPos(f.cursorPos)
+	} else {
+		(*f.screen).HideCursor()
+	}
+}
+
+func (f *InputField) SetTheme(theme *Theme) {
+	f.Theme = theme
+}
+
+func (f *InputField) GetPos() (int, int) {
+	return f.x, f.y
+}
+
+func (f *InputField) SetPos(x, y int) {
+	f.x, f.y = x, y
+}
+
+func (f *InputField) GetMinSize() (int, int) {
+	return 0, 0
+}
+
+func (f *InputField) GetSize() (int, int) {
+	return f.width, f.height
+}
+
+func (f *InputField) SetSize(width, height int) {
+	f.width, f.height = width, height
+}
+
+func (f *InputField) HandleEvent(event tcell.Event) bool {
+	switch ev := event.(type) {
+	case *tcell.EventKey:
+		switch ev.Key() {
+		case tcell.KeyLeft:
+			f.SetCursorPos(f.cursorPos - 1)
+		case tcell.KeyRight:
+			f.SetCursorPos(f.cursorPos + 1)
+		case tcell.KeyRune:
+			ch := ev.Rune()
+			f.Text += string(ch)
+			f.SetCursorPos(f.cursorPos + 1)
+		default:
+			return false
+		}
+		return true
+	}
+	return false
+}