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// Package app is glint's top-level Bubbletea model. It owns the active mode and
// routes messages to the editor, picker, or preview sub-models.
package app
import (
"fmt"
"math"
"os"
"path/filepath"
"strings"
"time"
"glint/internal/config"
"glint/internal/editor"
"glint/internal/picker"
"glint/internal/preview"
"glint/internal/theme"
"github.com/charmbracelet/bubbles/textinput"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
)
// Mode selects which sub-view is active.
type Mode int
const (
ModeEditor Mode = iota
ModePicker
ModePreview
ModeSaveAs
)
// pendingDiscard tracks which open-while-dirty action is awaiting confirmation.
type pendingDiscard int
const (
discardNone pendingDiscard = iota
discardPicker
discardDaily
discardNew
)
// Canvas layout: a centered, percentage-width text column with a little top air.
const (
canvasRatio = 0.75
canvasMax = 120
canvasMin = 24
canvasTopPad = 3
)
// App is the root model.
type App struct {
mode Mode
cfg config.Config
theme theme.Theme
editor *editor.Editor
preview *preview.Model
picker *picker.Model
saveInput textinput.Model // one-line "save as" prompt for unnamed buffers
path string
pickerRoot string // directory the current picker is browsing
saveDir string // where an unnamed buffer's save-as lands ("" → inbox)
status string
width int
height int
quitArmed bool // true after a dirty Ctrl+Q, awaiting confirm
pending pendingDiscard // armed open-while-dirty confirmation
}
// New builds an App with an empty editor.
func New(cfg config.Config) *App {
th := theme.Resolve(cfg.Theme)
ed := editor.New()
ed.SetTheme(th)
ti := textinput.New()
ti.Prompt = "save as › "
ti.Placeholder = "name…"
a := &App{
mode: ModeEditor,
cfg: cfg,
theme: th,
editor: ed,
saveInput: ti,
}
a.preview = preview.New(a.glamourStyle())
a.preview.SetBackground(string(th.Background))
return a
}
// Load reads a file into the editor and switches to edit mode.
func (a *App) Load(path string) error {
data, err := os.ReadFile(path)
if err != nil {
return err
}
a.editor.SetContent(data)
a.path = path
a.mode = ModeEditor
a.status = path
return nil
}
// Start picks the initial view: an explicit path, today's daily note, or the
// picker when neither is given.
func (a *App) Start(path string, daily bool) error {
switch {
case path != "":
return a.Load(path)
case daily:
_, cmd := a.openDaily()
_ = cmd
return nil
default:
_, cmd := a.openPicker()
_ = cmd
return nil
}
}
func (a *App) Init() tea.Cmd { return nil }
// Update routes messages. Global keys are handled first, then mode-specific.
func (a *App) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
switch msg := msg.(type) {
case tea.WindowSizeMsg:
a.setSize(msg.Width, msg.Height)
return a, nil
case tea.KeyMsg:
return a.handleKey(msg)
case tea.MouseMsg:
return a.handleMouse(msg)
}
return a, nil
}
// handleMouse moves the cursor on a left click and scrolls on wheel events.
func (a *App) handleMouse(msg tea.MouseMsg) (tea.Model, tea.Cmd) {
const step = 3
if msg.Button == tea.MouseButtonLeft {
if msg.Action == tea.MouseActionPress && a.mode == ModeEditor {
// The first editor visual row sits at screen row topPad; a click at
// screen row Y is that many rows into the viewport.
vi := a.editor.Scroll + msg.Y - a.topPad() + 1
col := msg.X - a.leftMargin()
a.editor.MoveToVisual(vi, col)
}
return a, nil
}
var delta int
switch msg.Button {
case tea.MouseButtonWheelUp:
delta = -step
case tea.MouseButtonWheelDown:
delta = step
default:
return a, nil
}
switch a.mode {
case ModePreview:
return a, a.preview.Update(msg) // the viewport handles wheel scrolling
case ModePicker:
key := tea.KeyMsg{Type: tea.KeyDown}
if delta < 0 {
key.Type = tea.KeyUp
}
for i := 0; i < step; i++ {
a.picker.Update(key)
}
default: // editor / save-as
a.editor.ScrollBy(delta)
}
return a, nil
}
func (a *App) handleKey(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
// Any key other than a second Ctrl+Q disarms the quit confirmation.
if msg.Type != tea.KeyCtrlQ {
a.quitArmed = false
}
// Disarm pending-discard unless the same action is being re-pressed.
repressed := (msg.Type == tea.KeyCtrlF && a.pending == discardPicker) ||
(msg.Type == tea.KeyCtrlD && a.pending == discardDaily) ||
(msg.Type == tea.KeyCtrlN && a.pending == discardNew)
if !repressed {
a.pending = discardNone
}
switch msg.Type {
case tea.KeyCtrlQ:
if a.editor.Dirty && !a.quitArmed {
a.quitArmed = true
a.status = "Unsaved changes — Ctrl+Q again to quit"
return a, nil
}
return a, tea.Quit
case tea.KeyCtrlS:
return a.save()
case tea.KeyCtrlP:
return a.togglePreview()
case tea.KeyCtrlT:
return a.cycleTheme()
case tea.KeyCtrlF:
if a.editor.Dirty && a.pending != discardPicker {
a.pending = discardPicker
a.status = "Unsaved changes — Ctrl+F again to discard"
return a, nil
}
a.pending = discardNone
return a.openPicker()
case tea.KeyCtrlD:
if a.editor.Dirty && a.pending != discardDaily {
a.pending = discardDaily
a.status = "Unsaved changes — Ctrl+D again to discard"
return a, nil
}
a.pending = discardNone
return a.openDaily()
case tea.KeyCtrlN:
return a.newFile(a.currentDir(), discardNew)
case tea.KeyEsc:
a.mode = ModeEditor
return a, nil
}
switch a.mode {
case ModeEditor:
a.editor.HandleKey(msg)
case ModeSaveAs:
if msg.Type == tea.KeyEnter {
return a.saveAs()
}
var cmd tea.Cmd
a.saveInput, cmd = a.saveInput.Update(msg)
return a, cmd
case ModePreview:
return a, a.preview.Update(msg)
case ModePicker:
if msg.Type == tea.KeyEnter {
if sel := a.picker.Selected(); sel != "" {
if err := a.Load(sel); err != nil {
a.status = "Open failed: " + err.Error()
}
}
return a, nil
}
return a, a.picker.Update(msg)
}
return a, nil
}
func (a *App) save() (tea.Model, tea.Cmd) {
if a.mode == ModeSaveAs {
return a.saveAs() // Ctrl+S confirms an open save-as prompt
}
if a.path == "" {
return a.promptSaveAs() // unnamed buffer → ask for a name
}
if err := os.WriteFile(a.path, a.editor.Bytes(), 0o644); err != nil {
a.status = "Save failed: " + err.Error()
return a, nil
}
a.editor.Dirty = false
a.status = "Saved " + a.path
return a, nil
}
// promptSaveAs opens the one-line save-as prompt for an unnamed buffer.
func (a *App) promptSaveAs() (tea.Model, tea.Cmd) {
a.saveInput.SetValue("")
a.saveInput.Focus()
a.mode = ModeSaveAs
a.status = "Save as — type a name, Enter to save, Esc to cancel"
return a, nil
}
// saveAs writes the unnamed buffer to a name typed at the prompt, resolved under
// the inbox directory, then binds the buffer to that path.
func (a *App) saveAs() (tea.Model, tea.Cmd) {
root := a.saveDir
if root == "" {
root = a.cfg.InboxRoot()
}
p := picker.NewNotePath(root, a.saveInput.Value())
if p == "" {
a.status = "Type a name first"
return a, nil
}
if err := os.MkdirAll(filepath.Dir(p), 0o755); err != nil {
a.status = "Save dir failed: " + err.Error()
return a, nil
}
if err := os.WriteFile(p, a.editor.Bytes(), 0o644); err != nil {
a.status = "Save failed: " + err.Error()
return a, nil
}
a.path = p
a.editor.Dirty = false
a.mode = ModeEditor
a.status = "Saved " + p
return a, nil
}
// newFile is the Ctrl+N / Ctrl+I handler: start a new note in dir. From the
// picker with a typed query it creates dir/<query>.md; otherwise it opens a
// blank buffer whose save-as targets dir (confirming discard if the editor is
// dirty, keyed by pend so re-pressing the same key confirms).
func (a *App) newFile(dir string, pend pendingDiscard) (tea.Model, tea.Cmd) {
if a.mode == ModePicker {
if q := strings.TrimSpace(a.picker.Query()); q != "" {
return a.openNoteAt(picker.NewNotePath(dir, q))
}
a.startBlankIn(dir)
return a, nil
}
if a.editor.Dirty && a.pending != pend {
a.pending = pend
a.status = "Unsaved changes — press again to discard"
return a, nil
}
a.pending = discardNone
a.startBlankIn(dir)
return a, nil
}
// startBlankIn opens an empty, unnamed buffer whose save-as targets dir.
func (a *App) startBlankIn(dir string) {
a.saveDir = dir
a.editor.SetContent(nil)
a.path = ""
a.mode = ModeEditor
a.status = "New note"
}
// openNoteAt creates the note at p (if absent) and opens it.
func (a *App) openNoteAt(p string) (tea.Model, tea.Cmd) {
if p == "" {
a.status = "Type a name first"
return a, nil
}
if _, err := os.Stat(p); os.IsNotExist(err) {
if err := os.MkdirAll(filepath.Dir(p), 0o755); err != nil {
a.status = "New note dir failed: " + err.Error()
return a, nil
}
if err := os.WriteFile(p, []byte{}, 0o644); err != nil {
a.status = "New note failed: " + err.Error()
return a, nil
}
}
if err := a.Load(p); err != nil {
a.status = "Open failed: " + err.Error()
}
return a, nil
}
// currentDir is the "same directory" for Ctrl+N: the picker root in the picker,
// the open file's folder in the editor, else the working directory.
func (a *App) currentDir() string {
if a.mode == ModePicker {
return a.pickerRoot
}
if a.path != "" {
return filepath.Dir(a.path)
}
return a.cfg.WorkingDir()
}
// StartNewIn is the `glint -n` entry point: a blank buffer targeting dir when
// name is empty, or a new note created at dir/<name>.md.
func (a *App) StartNewIn(dir, name string) error {
if strings.TrimSpace(name) == "" {
a.startBlankIn(dir)
return nil
}
p := picker.NewNotePath(dir, name)
if _, err := os.Stat(p); os.IsNotExist(err) {
if err := os.MkdirAll(filepath.Dir(p), 0o755); err != nil {
return err
}
if err := os.WriteFile(p, []byte{}, 0o644); err != nil {
return err
}
}
return a.Load(p)
}
// StartNew creates a new note in the inbox (kept for callers/tests).
func (a *App) StartNew(name string) error { return a.StartNewIn(a.cfg.InboxRoot(), name) }
// glamourStyle is the explicit config override if set, else the theme's style.
func (a *App) glamourStyle() string {
if a.cfg.GlamourStyle != "" {
return a.cfg.GlamourStyle
}
return a.theme.GlamourStyle
}
// cycleTheme advances to the next theme and repaints the editor, preview, and
// (if open) the picker.
func (a *App) cycleTheme() (tea.Model, tea.Cmd) {
a.theme = theme.Next(a.theme.Name)
a.editor.SetTheme(a.theme)
a.preview.SetStyle(a.glamourStyle())
a.preview.SetBackground(string(a.theme.Background))
// Re-render an open preview so its glamour style follows the new theme
// (otherwise it keeps the old light/dark block until the next toggle).
if a.mode == ModePreview {
_ = a.preview.Render(string(a.editor.Bytes()))
}
if a.picker != nil {
a.picker.SetTheme(a.theme)
a.picker.SetStyle(a.glamourStyle())
}
a.status = "Theme: " + a.theme.Name
return a, nil
}
// togglePreview switches between the editor and the Glamour read view.
func (a *App) togglePreview() (tea.Model, tea.Cmd) {
if a.mode == ModePreview {
a.mode = ModeEditor
return a, nil
}
if err := a.preview.Render(string(a.editor.Bytes())); err != nil {
a.status = "Preview failed: " + err.Error()
return a, nil
}
a.mode = ModePreview
return a, nil
}
// contentWidth is the centered text column width: ~65% of the terminal, capped
// for readability and floored so it never collapses, never wider than the term.
func (a *App) contentWidth() int {
w := int(math.Round(float64(a.width) * canvasRatio))
if w > canvasMax {
w = canvasMax
}
if w < canvasMin {
w = canvasMin
}
if w > a.width {
w = a.width
}
return w
}
// leftMargin centers the content column in the terminal.
func (a *App) leftMargin() int {
m := (a.width - a.contentWidth()) / 2
if m < 0 {
m = 0
}
return m
}
func (a *App) topPad() int { return canvasTopPad }
func (a *App) setSize(w, h int) {
a.width = w
a.height = h
cw := a.contentWidth()
textRows := h - 1 - a.topPad() // status bar + top pad
if textRows < 1 {
textRows = 1
}
a.editor.SetSize(cw, textRows)
a.preview.SetSize(cw, textRows)
if a.picker != nil {
a.picker.SetSize(w, h-1) // picker keeps its full-width split
}
}
// openPicker builds a fresh picker over the working directory and switches to it.
func (a *App) openPicker() (tea.Model, tea.Cmd) {
return a.openPickerAt(a.cfg.WorkingDir())
}
// openPickerAt opens the picker rooted at dir and records the root.
func (a *App) openPickerAt(dir string) (tea.Model, tea.Cmd) {
p, err := picker.New(dir, a.theme, a.cfg.DailyPath(time.Now()), a.glamourStyle())
if err != nil {
a.status = "Picker failed: " + err.Error()
return a, nil
}
p.SetSize(a.width, a.height-1)
a.picker = p
a.pickerRoot = dir
a.mode = ModePicker
return a, nil
}
// StartPickerIn opens the picker over dir (used by -v/-i/-d and the default).
func (a *App) StartPickerIn(dir string) error {
_, _ = a.openPickerAt(dir)
return nil
}
// StartVault opens the picker over the configured vault.
func (a *App) StartVault() error { return a.StartPickerIn(a.cfg.Vault()) }
// openDaily opens today's daily note, creating the file and directory if needed.
func (a *App) openDaily() (tea.Model, tea.Cmd) {
path := a.cfg.DailyPath(time.Now())
if _, err := os.Stat(path); os.IsNotExist(err) {
if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
a.status = "Daily dir failed: " + err.Error()
return a, nil
}
if err := os.WriteFile(path, []byte{}, 0o644); err != nil {
a.status = "Daily create failed: " + err.Error()
return a, nil
}
}
if err := a.Load(path); err != nil {
a.status = "Daily open failed: " + err.Error()
}
return a, nil
}
// View renders the active sub-view. The editor and preview sit in a centered,
// padded column; the picker keeps its own full-width layout.
func (a *App) View() string {
if a.mode == ModePicker {
body := a.picker.View()
if !strings.HasSuffix(body, "\n") {
body += "\n"
}
return body + a.statusBar()
}
var body string
if a.mode == ModePreview {
body = a.preview.View()
} else {
body = a.editor.View() // editor stays visible beneath the save-as prompt
}
bottom := a.statusBar()
if a.mode == ModeSaveAs {
bottom = a.saveBar()
}
return a.paintCanvas(body) + bottom
}
// saveBar renders the save-as prompt as a themed full-width bottom bar.
func (a *App) saveBar() string {
bar := lipgloss.NewStyle().
Foreground(a.theme.StatusFg).
Background(a.theme.StatusBg).
Width(maxInt(a.width, 1))
return bar.Render(" " + a.saveInput.View() + " ")
}
// paintCanvas centers body in the theme's paper: a top pad, then each body line
// indented by the left margin, every line filled to the full terminal width with
// the theme background so margins and empty space carry the theme color rather
// than the terminal default. The result is exactly height-1 rows (the status bar
// is the final row) and always ends with a trailing newline before it.
func (a *App) paintCanvas(body string) string {
bg := lipgloss.NewStyle().Background(a.theme.Background).Width(maxInt(a.width, 1))
lm := strings.Repeat(" ", a.leftMargin())
rows := make([]string, 0, a.height)
for p := 0; p < a.topPad(); p++ {
rows = append(rows, bg.Render(""))
}
for _, ln := range strings.Split(body, "\n") {
if ln == "" {
rows = append(rows, bg.Render(""))
} else {
rows = append(rows, bg.Render(lm+ln))
}
}
return strings.Join(rows, "\n") + "\n"
}
func (a *App) statusBar() string {
bar := lipgloss.NewStyle().
Foreground(a.theme.StatusFg).
Background(a.theme.StatusBg).
Width(maxInt(a.width, 1))
dirty := ""
if a.editor.Dirty {
dirty = " ●"
}
left := a.status
if left == "" {
left = "glint"
}
return bar.Render(fmt.Sprintf(" %s%s ", left, dirty))
}
func maxInt(a, b int) int {
if a > b {
return a
}
return b
}
|