textarea

type CursorStyle struct {
	// Style styles the cursor block.
	//
	// For real cursors, the foreground color set here will be used as the
	// cursor color.
	Color color.Color

	// Shape is the cursor shape. The following shapes are available:
	//
	// - tea.CursorBlock
	// - tea.CursorUnderline
	// - tea.CursorBar
	//
	// This is only used for real cursors.
	Shape tea.CursorShape

	// CursorBlink determines whether or not the cursor should blink.
	Blink bool

	// BlinkSpeed is the speed at which the virtual cursor blinks. This has no
	// effect on real cursors as well as no effect if the cursor is set not to
	// [CursorBlink].
	//
	// By default, the blink speed is set to about 500ms.
	BlinkSpeed time.Duration
}

type KeyMap struct {
	CharacterBackward       key.Binding
	CharacterForward        key.Binding
	DeleteAfterCursor       key.Binding
	DeleteBeforeCursor      key.Binding
	DeleteCharacterBackward key.Binding
	DeleteCharacterForward  key.Binding
	DeleteWordBackward      key.Binding
	DeleteWordForward       key.Binding
	InsertNewline           key.Binding
	LineEnd                 key.Binding
	LineNext                key.Binding
	LinePrevious            key.Binding
	LineStart               key.Binding
	Paste                   key.Binding
	WordBackward            key.Binding
	WordForward             key.Binding
	InputBegin              key.Binding
	InputEnd                key.Binding

	UppercaseWordForward  key.Binding
	LowercaseWordForward  key.Binding
	CapitalizeWordForward key.Binding

	TransposeCharacterBackward key.Binding
}

type LineInfo struct {
	// Width is the number of columns in the line.
	Width int

	// CharWidth is the number of characters in the line to account for
	// double-width runes.
	CharWidth int

	// Height is the number of rows in the line.
	Height int

	// StartColumn is the index of the first column of the line.
	StartColumn int

	// ColumnOffset is the number of columns that the cursor is offset from the
	// start of the line.
	ColumnOffset int

	// RowOffset is the number of rows that the cursor is offset from the start
	// of the line.
	RowOffset int

	// CharOffset is the number of characters that the cursor is offset
	// from the start of the line. This will generally be equivalent to
	// ColumnOffset, but will be different there are double-width runes before
	// the cursor.
	CharOffset int
}

type Model struct {
	Err error

	// Prompt is printed at the beginning of each line.
	//
	// When changing the value of Prompt after the model has been
	// initialized, ensure that SetWidth() gets called afterwards.
	//
	// See also [SetPromptFunc] for a dynamic prompt.
	Prompt string

	// Placeholder is the text displayed when the user
	// hasn't entered anything yet.
	Placeholder string

	// ShowLineNumbers, if enabled, causes line numbers to be printed
	// after the prompt.
	ShowLineNumbers bool

	// EndOfBufferCharacter is displayed at the end of the input.
	EndOfBufferCharacter rune

	// KeyMap encodes the keybindings recognized by the widget.
	KeyMap KeyMap

	// Styling. FocusedStyle and BlurredStyle are used to style the textarea in
	// focused and blurred states.
	Styles Styles

	// VirtualCursor determines whether or not to use the virtual cursor. If
	// set to false, use [Model.Cursor] to return a real cursor for rendering.
	VirtualCursor bool

	// CharLimit is the maximum number of characters this input element will
	// accept. If 0 or less, there's no limit.
	CharLimit int

	// MaxHeight is the maximum height of the text area in rows. If 0 or less,
	// there's no limit.
	MaxHeight int

	// MaxWidth is the maximum width of the text area in columns. If 0 or less,
	// there's no limit.
	MaxWidth int
	// contains filtered or unexported fields
}

type StyleState struct {
	Base             lipgloss.Style
	Text             lipgloss.Style
	LineNumber       lipgloss.Style
	CursorLineNumber lipgloss.Style
	CursorLine       lipgloss.Style
	EndOfBuffer      lipgloss.Style
	Placeholder      lipgloss.Style
	Prompt           lipgloss.Style
}

type Styles struct {
	Focused StyleState
	Blurred StyleState
	Cursor  CursorStyle
}