mirror of
https://github.com/anotherhadi/ilovetui.git
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Hadi
116 lines
2.8 KiB
Go
116 lines
2.8 KiB
Go
// Package notification renders toast-style notifications, triggered from
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// anywhere in a bubbletea program via an exported tea.Msg (see ShowMsg/Show)
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// rather than a direct reference to the Model that ends up rendering them.
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//
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// It composites over an already-rendered string (see Model.Render), so it
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// makes no assumption at all about how the host builds that string: the same
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// Model works whatever the host uses to lay out its main content (see
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// Model.Render and Model.View).
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package notification
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import (
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"fmt"
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"time"
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tea "charm.land/bubbletea/v2"
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)
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// Model holds the currently visible toasts and the rendering config
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// (position, max width, per-Kind styles) they share. Build one with New.
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type Model struct {
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toasts []Toast
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nextID int
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position Position
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maxWidth int
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styles Styles
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}
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// Option configures a Model at construction. See WithPosition, WithMaxWidth,
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// WithStyles.
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type Option func(*Model)
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// WithPosition sets which edge/corner the toast stack anchors to. TopRight
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// by default.
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func WithPosition(p Position) Option {
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return func(m *Model) { m.position = p }
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}
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// WithMaxWidth caps how wide a toast box can grow before its message
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// wraps. A toast narrower than this shrinks to fit its content instead of
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// padding out to the cap. 0 (also the zero-value Model's default without
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// New) means unlimited.
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func WithMaxWidth(w int) Option {
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return func(m *Model) { m.maxWidth = w }
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}
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// WithStyles overrides the default per-Kind styles (see DefaultStyles).
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func WithStyles(s Styles) Option {
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return func(m *Model) { m.styles = s }
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}
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// New builds a Model. Defaults: TopRight, a 40-cell max width, DefaultStyles.
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func New(opts ...Option) Model {
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m := Model{
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position: TopRight,
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maxWidth: 40,
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styles: DefaultStyles(),
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}
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for _, opt := range opts {
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opt(&m)
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}
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return m
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}
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func (m Model) Init() tea.Cmd { return nil }
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func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
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switch msg := msg.(type) {
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case ShowMsg:
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return m.show(msg.Toast)
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case DismissMsg:
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return m.remove(msg.ID), nil
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case expireMsg:
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return m.remove(msg.id), nil
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}
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return m, nil
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}
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// show adds or replaces (see WithID) a toast, and schedules its expiry via
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// tea.Tick if it isn't sticky (Duration <= 0).
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func (m Model) show(t Toast) (Model, tea.Cmd) {
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if t.ID == "" {
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t.ID = fmt.Sprintf("toast-%d", m.nextID)
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m.nextID++
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}
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replaced := false
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for i, existing := range m.toasts {
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if existing.ID == t.ID {
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m.toasts[i] = t
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replaced = true
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break
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}
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}
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if !replaced {
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m.toasts = append(m.toasts, t)
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}
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if t.Duration <= 0 {
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return m, nil
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}
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id := t.ID
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return m, tea.Tick(t.Duration, func(time.Time) tea.Msg {
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return expireMsg{id: id}
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})
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}
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func (m Model) remove(id string) Model {
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for i, t := range m.toasts {
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if t.ID == id {
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m.toasts = append(m.toasts[:i], m.toasts[i+1:]...)
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break
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}
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}
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return m
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}
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