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// Package picker is a fuzzy file browser over a directory of markdown files.
// It sorts by modified-date (newest first), floats today's daily note to the
// top, and paints with the active theme.
package picker
import (
"fmt"
"io/fs"
"os"
"path/filepath"
"sort"
"strings"
"time"
"glint/internal/preview"
"glint/internal/theme"
"github.com/charmbracelet/bubbles/textinput"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
)
// fileEntry is a markdown file plus its modification time.
type fileEntry struct {
path string
mod time.Time
}
// result is one match shown in the list: a file path, plus (for content-search
// hits) the 1-based line number and the matching line's text. line == 0 marks a
// plain filename match (TASK-013).
type result struct {
path string
line int
text string
}
// Model holds the query input, the file set, and the current match list.
type Model struct {
input textinput.Model
all []fileEntry
root string
todayPath string
matches []result
sel int
width int
height int
theme theme.Theme
preview *preview.Model
style string
}
// New walks root for markdown files and returns a ready picker themed by th.
// todayPath is the absolute path of today's daily note (floated to the top when
// present); pass "" if there is none. glamourStyle is the name of the glamour
// rendering style for the preview pane.
func New(root string, th theme.Theme, todayPath, glamourStyle string) (*Model, error) {
files, err := walkMarkdown(root)
if err != nil {
return nil, err
}
ti := textinput.New()
ti.Prompt = "note › "
ti.Placeholder = "filter…"
ti.Focus()
m := &Model{
input: ti,
all: files,
root: root,
todayPath: todayPath,
width: 80,
height: 24,
theme: th,
preview: preview.New(glamourStyle),
style: glamourStyle,
}
m.recompute()
return m, nil
}
// SetSize records dimensions and sizes the preview pane.
func (m *Model) SetSize(w, h int) {
m.width = w
m.height = h
m.preview.SetSize(m.previewWidth(), h-2)
m.renderPreview()
}
// SetTheme repaints the picker with a new theme.
func (m *Model) SetTheme(t theme.Theme) { m.theme = t }
// SetStyle changes the preview's glamour style.
func (m *Model) SetStyle(s string) {
m.style = s
m.preview.SetStyle(s)
m.renderPreview()
}
// Query returns the current filter text (used by the app's new-note shortcut).
func (m *Model) Query() string { return m.input.Value() }
// Update handles query edits and selection movement.
func (m *Model) Update(msg tea.Msg) tea.Cmd {
if key, ok := msg.(tea.KeyMsg); ok {
switch key.Type {
case tea.KeyUp:
if m.sel > 0 {
m.sel--
m.renderPreview()
}
return nil
case tea.KeyDown:
if m.sel < len(m.matches)-1 {
m.sel++
m.renderPreview()
}
return nil
}
}
var cmd tea.Cmd
m.input, cmd = m.input.Update(msg)
m.recompute()
return cmd
}
// recompute refilters against the current query. A query prefixed with "/" runs
// a full-text content search; otherwise it fuzzy-matches filenames (TASK-013).
func (m *Model) recompute() {
if rest, ok := strings.CutPrefix(m.input.Value(), "/"); ok {
m.matches = m.contentMatches(rest)
} else {
m.matches = m.fileMatches(m.input.Value())
}
if m.sel >= len(m.matches) {
m.sel = 0
}
m.renderPreview()
}
// fileMatches ranks filename matches as line-less results.
func (m *Model) fileMatches(query string) []result {
paths := rankEntries(m.all, query, m.todayPath)
out := make([]result, len(paths))
for i, p := range paths {
out[i] = result{path: p}
}
return out
}
// contentMatches searches note bodies for query, returning file+line hits.
func (m *Model) contentMatches(query string) []result {
hits := contentSearch(m.root, query)
out := make([]result, len(hits))
for i, h := range hits {
out[i] = result{path: h.Path, line: h.Line, text: h.Text}
}
return out
}
// rankEntries filters all entries by the fuzzy query and orders the survivors.
// Empty query: today's note first, then modified-date descending. Non-empty:
// fuzzy score descending, then modified-date descending.
func rankEntries(all []fileEntry, query, today string) []string {
type scored struct {
e fileEntry
score int
}
var hits []scored
for _, e := range all {
label := filepath.Base(e.path)
if s, ok := fuzzyMatch(query, label); ok {
hits = append(hits, scored{e, s})
}
}
sort.SliceStable(hits, func(i, j int) bool {
if query == "" {
ti := hits[i].e.path == today
tj := hits[j].e.path == today
if ti != tj {
return ti // today's note floats up
}
return hits[i].e.mod.After(hits[j].e.mod)
}
if hits[i].score != hits[j].score {
return hits[i].score > hits[j].score
}
return hits[i].e.mod.After(hits[j].e.mod)
})
out := make([]string, 0, len(hits))
for _, h := range hits {
out = append(out, h.e.path)
}
return out
}
// label is the vault-relative path shown to the user.
func (m *Model) label(p string) string {
if rel, err := filepath.Rel(m.root, p); err == nil {
return rel
}
return p
}
// rowLabel is the list text for a match: the relative path, plus ":line text"
// for a content-search hit (TASK-013).
func (m *Model) rowLabel(r result) string {
if r.line > 0 {
return fmt.Sprintf("%s:%d %s", m.label(r.path), r.line, r.text)
}
return m.label(r.path)
}
// Selected returns the highlighted match's absolute path, or "".
func (m *Model) Selected() string {
if m.sel < 0 || m.sel >= len(m.matches) {
return ""
}
return m.matches[m.sel].path
}
// SelectedLine returns the 1-based line of the highlighted content-search hit,
// or 0 for a filename match (or no selection) — the app jumps there on open
// (TASK-013).
func (m *Model) SelectedLine() int {
if m.sel < 0 || m.sel >= len(m.matches) {
return 0
}
return m.matches[m.sel].line
}
// previewWidth is the column width of the preview pane (~60%), or 0 when the
// terminal is too narrow to split.
func (m *Model) previewWidth() int {
if m.width < 60 {
return 0
}
return m.width*6/10 - 2 // minus border
}
// listColWidth is the width available to the match list: the full terminal when
// the preview pane is hidden, else the leftover column beside it (matching the
// width used to render listCol in View).
func (m *Model) listColWidth() int {
if m.previewWidth() <= 0 {
return m.width
}
w := m.width - m.previewWidth() - 3
if w < 1 {
w = 1
}
return w
}
// truncateTail shortens s to at most max runes, keeping the tail (the filename
// end is the useful part of a long path) behind a leading ellipsis. Labels must
// fit one row: a wrapped label inflates the list past the viewport and scrolls
// the query field off the top.
func truncateTail(s string, max int) string {
if max <= 0 {
return ""
}
r := []rune(s)
if len(r) <= max {
return s
}
if max == 1 {
return "…"
}
return "…" + string(r[len(r)-(max-1):])
}
// renderPreview loads the highlighted file into the preview viewport.
func (m *Model) renderPreview() {
if m.previewWidth() <= 0 {
return
}
sel := m.Selected()
if sel == "" {
_ = m.preview.Render("")
return
}
data, err := os.ReadFile(sel)
if err != nil {
_ = m.preview.Render("_could not read file_")
return
}
_ = m.preview.Render(string(data))
}
// View renders the query + themed match list on the left and a glamour preview
// of the highlighted file on the right (when the terminal is wide enough).
func (m *Model) View() string {
left := m.listView()
if m.previewWidth() <= 0 {
return left
}
border := lipgloss.NewStyle().
Border(lipgloss.RoundedBorder()).
BorderForeground(m.theme.Muted).
Width(m.previewWidth()).
Height(m.height - 2)
right := border.Render(m.preview.View())
listCol := lipgloss.NewStyle().Width(m.width - m.previewWidth() - 3).Render(left)
return lipgloss.JoinHorizontal(lipgloss.Top, listCol, right)
}
// listView is the query line plus the themed match list.
func (m *Model) listView() string {
var b strings.Builder
b.WriteString(m.input.View())
b.WriteByte('\n')
selStyle := lipgloss.NewStyle().Foreground(m.theme.SelFg).Background(m.theme.SelBg)
plain := lipgloss.NewStyle().Foreground(m.theme.Text)
pointer := lipgloss.NewStyle().Foreground(m.theme.Pointer)
rows := m.height - 2
if rows < 1 {
rows = 1
}
labelW := m.listColWidth() - 2 // leave room for the "▸ "/" " prefix
for i := 0; i < len(m.matches) && i < rows; i++ {
label := truncateTail(m.rowLabel(m.matches[i]), labelW)
if i == m.sel {
b.WriteString(pointer.Render("▸ "))
b.WriteString(selStyle.Render(label))
} else {
b.WriteString(plain.Render(" " + label))
}
b.WriteByte('\n')
}
return b.String()
}
// walkMarkdown returns .md files (with mtimes) under root, skipping dot-dirs.
func walkMarkdown(root string) ([]fileEntry, error) {
var out []fileEntry
err := filepath.WalkDir(root, func(path string, d fs.DirEntry, err error) error {
if err != nil {
return nil // skip unreadable entries
}
if d.IsDir() {
if path != root && strings.HasPrefix(d.Name(), ".") {
return filepath.SkipDir
}
return nil
}
if strings.EqualFold(filepath.Ext(d.Name()), ".md") {
abs, aerr := filepath.Abs(path)
if aerr != nil {
return nil
}
var mod time.Time
if info, ierr := d.Info(); ierr == nil {
mod = info.ModTime()
}
out = append(out, fileEntry{path: abs, mod: mod})
}
return nil
})
return out, err
}
// fuzzyMatch reports whether query is a case-insensitive subsequence of
// candidate, scoring contiguous matches higher (fewer gaps -> higher score).
func fuzzyMatch(query, candidate string) (int, bool) {
if query == "" {
return 0, true
}
q := []rune(strings.ToLower(query))
c := []rune(strings.ToLower(candidate))
score, qi, last := 0, 0, -1
for ci := 0; ci < len(c) && qi < len(q); ci++ {
if c[ci] == q[qi] {
if last >= 0 {
score -= ci - last - 1 // penalize gaps
}
last = ci
qi++
}
}
if qi != len(q) {
return 0, false
}
return score, true
}
// NewNotePath builds an absolute note path from a query under root. It trims
// surrounding whitespace, appends ".md" when absent, and supports "Folder/Name".
// A blank query yields "".
func NewNotePath(root, query string) string {
rel := strings.TrimSpace(query)
if rel == "" {
return ""
}
if !strings.EqualFold(filepath.Ext(rel), ".md") {
rel += ".md"
}
return filepath.Join(root, rel)
}
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