feat(textarea): make max width/height configurable

textarea/textarea.go

@@ -21,8 +21,8 @@ const (
  defaultHeight = 6
  defaultWidth = 40
  defaultCharLimit = 400
- maxHeight  = 99
- maxWidth  = 500
+ defaultMaxHeight = 99
+ defaultMaxWidth = 500
 )
 
 // Internal messages for clipboard operations.
@@ -174,6 +174,14 @@ type Model struct {
  // 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
+
  // If promptFunc is set, it replaces Prompt as a generator for
  // prompt strings at the beginning of each line.
  promptFunc func(line int) string
@@ -228,6 +236,8 @@ func New() Model {
 
  m := Model{
  CharLimit: defaultCharLimit,
+ MaxHeight: defaultMaxHeight,
+ MaxWidth: defaultMaxWidth,
  Prompt: lipgloss.ThickBorder().Left + " ",
  style: &blurredStyle,
  FocusedStyle: focusedStyle,
@@ -237,7 +247,7 @@ func New() Model {
  Cursor: cur,
  KeyMap: DefaultKeyMap,
 
- value: make([][]rune, minHeight, maxHeight),
+ value: make([][]rune, minHeight, defaultMaxHeight),
  focus: false,
  col: 0,
  row: 0,
@@ -336,8 +346,8 @@ func (m *Model) insertRunesFromUserInput(runes []rune) {
  }
 
  // Obey the maximum height limit.
- if len(m.value)+len(lines)-1 > maxHeight {
- allowedHeight := max(0, maxHeight-len(m.value)+1)
+ if m.MaxHeight > 0 && len(m.value)+len(lines)-1 > m.MaxHeight {
+ allowedHeight := max(0, m.MaxHeight-len(m.value)+1)
  lines = lines[:allowedHeight]
  }
 
@@ -530,7 +540,11 @@ func (m *Model) Blur() {
 
 // Reset sets the input to its default state with no input.
 func (m *Model) Reset() {
- m.value = make([][]rune, minHeight, maxHeight)
+ startCap := m.MaxHeight
+ if startCap <= 0 {
+ startCap = defaultMaxHeight
+ }
+ m.value = make([][]rune, minHeight, startCap)
  m.col = 0
  m.row = 0
  m.viewport.GotoTop()
@@ -830,7 +844,11 @@ func (m *Model) moveToEnd() {
 // It is important that the width of the textarea be exactly the given width
 // and no more.
 func (m *Model) SetWidth(w int) {
- m.viewport.Width = clamp(w, minWidth, maxWidth)
+ if m.MaxWidth > 0 {
+ m.viewport.Width = clamp(w, minWidth, m.MaxWidth)
+ } else {
+ m.viewport.Width = max(w, minWidth)
+ }
 
  // Since the width of the textarea input is dependent on the width of the
  // prompt and line numbers, we need to calculate it by subtracting.
@@ -847,7 +865,11 @@ func (m *Model) SetWidth(w int) {
  }
 
  inputWidth -= m.promptWidth
- m.width = clamp(inputWidth, minWidth, maxWidth)
+ if m.MaxWidth > 0 {
+ m.width = clamp(inputWidth, minWidth, m.MaxWidth)
+ } else {
+ m.width = max(inputWidth, minWidth)
+ }
 }
 
 // SetPromptFunc supersedes the Prompt field and sets a dynamic prompt
@@ -869,8 +891,13 @@ func (m Model) Height() int {
 
 // SetHeight sets the height of the textarea.
 func (m *Model) SetHeight(h int) {
- m.height = clamp(h, minHeight, maxHeight)
- m.viewport.Height = clamp(h, minHeight, maxHeight)
+ if m.MaxHeight > 0 {
+ m.height = clamp(h, minHeight, m.MaxHeight)
+ m.viewport.Height = clamp(h, minHeight, m.MaxHeight)
+ } else {
+ m.height = max(h, minHeight)
+ m.viewport.Height = max(h, minHeight)
+ }
 }
 
 // Update is the Bubble Tea update loop.
@@ -940,7 +967,7 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
  }
  m.deleteWordRight()
  case key.Matches(msg, m.KeyMap.InsertNewline):
- if len(m.value) >= maxHeight {
+ if m.MaxHeight > 0 && len(m.value) >= m.MaxHeight {
  return m, nil
  }
  m.col = clamp(m.col, 0, len(m.value[m.row]))