diff --git a/textinput/textinput.go b/textinput/textinput.go index f336386..f355bba 100644 --- a/textinput/textinput.go +++ b/textinput/textinput.go @@ -3,6 +3,7 @@ package textinput import ( "context" "strings" + "sync" "time" "unicode" @@ -14,11 +15,35 @@ import ( const defaultBlinkSpeed = time.Millisecond * 530 -// blinkMsg and blinkCanceled are used to manage cursor blinking. -type blinkMsg struct{} +// Internal ID management for text inputs. Necessary for blink integrity when +// multiple text inputs are involved. +var ( + lastID int + idMtx sync.Mutex +) + +// Return the next ID we should use on the Model. +func nextID() int { + idMtx.Lock() + defer idMtx.Unlock() + lastID++ + return lastID +} + +// initialBlinkMsg initializes cursor blinking. +type initialBlinkMsg struct{} + +// blinkMsg signals that the cursor should blink. It contains metadata that +// allows us to tell if the blink message is the one we're expecting. +type blinkMsg struct { + id int + tag int +} + +// blinkCanceled is sent when a blink operation is canceled. type blinkCanceled struct{} -// Messages for clipboard events. +// Internal messages for clipboard operations. type pasteMsg string type pasteErrMsg struct{ error } @@ -96,6 +121,12 @@ type Model struct { // viewport. If 0 or less this setting is ignored. Width int + // The ID of this Model as it relates to other textinput Models. + id int + + // The ID of the blink message we're expecting to receive. + blinkTag int + // Underlying text value. value []rune @@ -130,6 +161,7 @@ func NewModel() Model { CharLimit: 0, PlaceholderStyle: lipgloss.NewStyle().Foreground(lipgloss.Color("240")), + id: nextID(), value: nil, focus: false, blink: true, @@ -221,7 +253,7 @@ func (m *Model) SetCursorMode(mode CursorMode) tea.Cmd { } // cursorEnd moves the cursor to the end of the input field and returns whether -// or not +// the cursor should blink should reset. func (m *Model) cursorEnd() bool { return m.setCursor(len(m.value)) } @@ -258,7 +290,7 @@ func (m *Model) Reset() bool { } // handle a clipboard paste event, if supported. Returns whether or not the -// cursor blink should be reset. +// cursor blink should reset. func (m *Model) handlePaste(v string) bool { paste := []rune(v) @@ -599,7 +631,30 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) { } } + case initialBlinkMsg: + // We accept all initialBlinkMsgs genrated by the Blink command. + + if m.cursorMode != CursorBlink || !m.focus { + return m, nil + } + + cmd := m.blinkCmd() + return m, cmd + case blinkMsg: + // We're choosy about whether to accept blinkMsgs so that our cursor + // only exactly when it should. + + // Is this model blinkable? + if m.cursorMode != CursorBlink || !m.focus { + return m, nil + } + + // Were we expecting this blink message? + if msg.id != m.id || msg.tag != m.blinkTag { + return m, nil + } + var cmd tea.Cmd if m.cursorMode == CursorBlink { m.blink = !m.blink @@ -690,7 +745,11 @@ func (m Model) cursorView(v string) string { } // blinkCmd is an internal command used to manage cursor blinking. -func (m Model) blinkCmd() tea.Cmd { +func (m *Model) blinkCmd() tea.Cmd { + if m.cursorMode != CursorBlink { + return nil + } + if m.blinkCtx != nil && m.blinkCtx.cancel != nil { m.blinkCtx.cancel() } @@ -698,11 +757,13 @@ func (m Model) blinkCmd() tea.Cmd { ctx, cancel := context.WithTimeout(m.blinkCtx.ctx, m.BlinkSpeed) m.blinkCtx.cancel = cancel + m.blinkTag++ + return func() tea.Msg { defer cancel() <-ctx.Done() if ctx.Err() == context.DeadlineExceeded { - return blinkMsg{} + return blinkMsg{id: m.id, tag: m.blinkTag} } return blinkCanceled{} } @@ -710,7 +771,7 @@ func (m Model) blinkCmd() tea.Cmd { // Blink is a command used to initialize cursor blinking. func Blink() tea.Msg { - return blinkMsg{} + return initialBlinkMsg{} } // Paste is a command for pasting from the clipboard into the text input.