vcom/internal/ui/model.go
2026-04-22 23:16:29 +03:00

1445 lines
35 KiB
Go

package ui
import (
"fmt"
"os"
"os/exec"
"path/filepath"
"strings"
"time"
"github.com/charmbracelet/bubbles/help"
"github.com/charmbracelet/bubbles/key"
"github.com/charmbracelet/bubbles/textinput"
"github.com/charmbracelet/bubbles/viewport"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
"vcom/internal/config"
vfs "vcom/internal/fs"
"vcom/internal/theme"
)
type modalKind int
const (
modalNone modalKind = iota
modalMkdir
modalConfirm
)
type fileOpKind int
const (
opCopy fileOpKind = iota
opMove
opDelete
opMkdir
opEdit
opView
)
type pendingOperation struct {
kind fileOpKind
sourcePath string
targetDir string
overwrite bool
}
type modalState struct {
kind modalKind
title string
body string
note string
input textinput.Model
pending *pendingOperation
}
type previewMsg struct {
entryPath string
preview vfs.Preview
}
type dirSizeMsg struct {
path string
size int64
err error
}
type opMsg struct {
kind fileOpKind
sourcePath string
targetPath string
err error
}
type mouseClickState struct {
pane PaneID
index int
at time.Time
}
type hoverState struct {
pane PaneID
index int
ok bool
}
type Model struct {
cfg config.Config
configPath string
palette theme.Palette
keys KeyMap
width int
height int
left BrowserPane
right BrowserPane
active PaneID
infoMode bool
selectMode bool
helpModel help.Model
previewModel viewport.Model
previewData vfs.Preview
modal modalState
status string
busy bool
lastClick mouseClickState
hover hoverState
}
func NewModel(cfg config.Config, configPath string) (Model, error) {
palette, err := theme.Resolve(cfg.UI.Theme)
if err != nil {
return Model{}, err
}
cwd, err := os.Getwd()
if err != nil {
return Model{}, err
}
leftPath, err := resolveStartPath(cfg.Startup.LeftPath, cwd)
if err != nil {
return Model{}, err
}
rightPath, err := resolveStartPath(cfg.Startup.RightPath, cwd)
if err != nil {
return Model{}, err
}
model := Model{
cfg: cfg,
configPath: configPath,
palette: palette,
keys: DefaultKeyMap(),
left: BrowserPane{ID: PaneLeft, Path: leftPath},
right: BrowserPane{ID: PaneRight, Path: rightPath},
active: PaneLeft,
status: "Ready",
}
model.helpModel = help.New()
model.helpModel.ShowAll = false
model.helpModel.Styles = help.Styles{
ShortKey: lipgloss.NewStyle().Foreground(palette.FooterKey).Bold(true),
ShortDesc: lipgloss.NewStyle().Foreground(palette.Text),
ShortSeparator: lipgloss.NewStyle().Foreground(palette.Border),
Ellipsis: lipgloss.NewStyle().Foreground(palette.Muted),
FullKey: lipgloss.NewStyle().Foreground(palette.FooterKey).Bold(true),
FullDesc: lipgloss.NewStyle().Foreground(palette.Text),
FullSeparator: lipgloss.NewStyle().Foreground(palette.Border),
}
model.previewModel = viewport.New(0, 0)
if err := model.reloadPane(PaneLeft, ""); err != nil {
return Model{}, err
}
if err := model.reloadPane(PaneRight, ""); err != nil {
return Model{}, err
}
return model, nil
}
func (m Model) Init() tea.Cmd {
return m.loadPreviewCmd()
}
func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
switch msg := msg.(type) {
case tea.WindowSizeMsg:
m.width = msg.Width
m.height = msg.Height
m.resizePreview()
m.syncPreviewContent()
return m, nil
case previewMsg:
if selected, ok := m.activePane().Selected(); ok && selected.Path == msg.entryPath {
m.applyPreview(msg.preview)
}
if m.selectMode && msg.preview.Kind != vfs.PreviewKindText {
m.selectMode = false
return m, enableMouseCmd()
}
return m, nil
case dirSizeMsg:
m.busy = false
if msg.err != nil {
m.status = fmt.Sprintf("Dir size failed: %v", msg.err)
return m, nil
}
m.applyDirSize(msg.path, msg.size)
m.status = fmt.Sprintf("Directory size calculated: %s", vfs.HumanSize(msg.size))
return m, m.loadPreviewCmd()
case opMsg:
m.busy = false
if msg.err != nil {
m.status = msg.err.Error()
return m, nil
}
m.modal = modalState{}
switch msg.kind {
case opCopy:
m.status = fmt.Sprintf("Copied to %s", msg.targetPath)
case opMove:
m.status = fmt.Sprintf("Moved to %s", msg.targetPath)
case opDelete:
m.status = "Deleted"
case opMkdir:
m.status = fmt.Sprintf("Created %s", msg.targetPath)
case opEdit:
m.status = "Editor closed"
return m, tea.Batch(m.loadPreviewCmd(), enableMouseCmd())
case opView:
m.status = "Viewer closed"
return m, enableMouseCmd()
}
activeSelection := selectedName(m.activePane())
_ = m.reloadPane(PaneLeft, activeSelection)
_ = m.reloadPane(PaneRight, activeSelection)
return m, m.loadPreviewCmd()
case tea.KeyMsg:
if m.modal.kind != modalNone {
return m.handleModalKey(msg)
}
switch {
case key.Matches(msg, m.keys.Quit):
return m, tea.Quit
case key.Matches(msg, m.keys.View):
return m.handleView()
case key.Matches(msg, m.keys.Edit):
return m.handleEdit()
case key.Matches(msg, m.keys.Info):
return m.toggleInfo()
case key.Matches(msg, m.keys.SelectText):
return m.toggleSelectMode()
case key.Matches(msg, m.keys.ToggleHidden):
return m.toggleHidden()
case key.Matches(msg, m.keys.CycleTheme):
return m.cycleTheme()
case key.Matches(msg, m.keys.CycleSort):
return m.cycleSort()
case key.Matches(msg, m.keys.Switch):
if m.active == PaneLeft {
m.active = PaneRight
} else {
m.active = PaneLeft
}
m.status = fmt.Sprintf("Active pane: %s", strings.ToUpper(string(m.active)))
return m, m.loadPreviewCmd()
case key.Matches(msg, m.keys.Up):
m.moveCursor(-1)
return m, m.loadPreviewCmd()
case key.Matches(msg, m.keys.Down):
m.moveCursor(1)
return m, m.loadPreviewCmd()
case key.Matches(msg, m.keys.PageUp):
m.moveCursor(-max(m.bodyHeight()-6, 5))
return m, m.loadPreviewCmd()
case key.Matches(msg, m.keys.PageDown):
m.moveCursor(max(m.bodyHeight()-6, 5))
return m, m.loadPreviewCmd()
case key.Matches(msg, m.keys.Open):
return m.handleOpenSelected()
case key.Matches(msg, m.keys.Back):
if err := m.goParent(); err != nil {
m.status = err.Error()
}
return m, m.loadPreviewCmd()
case key.Matches(msg, m.keys.Refresh):
return m.refreshAllPanes("Refreshed")
case key.Matches(msg, m.keys.DirSize):
return m.handleDirSize()
case key.Matches(msg, m.keys.Copy):
return m.handleTransfer(opCopy)
case key.Matches(msg, m.keys.Move):
return m.handleTransfer(opMove)
case key.Matches(msg, m.keys.Mkdir):
m.openMkdirModal()
return m, nil
case key.Matches(msg, m.keys.Delete):
return m.handleDelete()
}
case tea.MouseMsg:
return m.handleMouse(msg)
}
return m, nil
}
func (m Model) View() string {
if m.width < 72 || m.height < 18 {
return lipgloss.NewStyle().
Foreground(m.palette.Warning).
Padding(1, 2).
Render("Terminal is too small for vcom. Resize the window.")
}
leftWidth, previewWidth, rightWidth := m.layoutWidths()
bodyHeight := m.bodyHeight()
gap := strings.Repeat(" ", m.cfg.UI.PaneGap)
var panels string
if m.infoMode {
if m.active == PaneLeft {
panels = lipgloss.JoinHorizontal(
lipgloss.Top,
renderPane(m.left, m.cfg, m.palette, leftWidth, bodyHeight, true, m.hoverIndexFor(PaneLeft)),
gap,
renderPreviewPane(m.previewData, &m.previewModel, m.cfg, m.palette, previewWidth, bodyHeight),
)
} else {
panels = lipgloss.JoinHorizontal(
lipgloss.Top,
renderPreviewPane(m.previewData, &m.previewModel, m.cfg, m.palette, previewWidth, bodyHeight),
gap,
renderPane(m.right, m.cfg, m.palette, rightWidth, bodyHeight, true, m.hoverIndexFor(PaneRight)),
)
}
} else {
panels = lipgloss.JoinHorizontal(
lipgloss.Top,
renderPane(m.left, m.cfg, m.palette, leftWidth, bodyHeight, m.active == PaneLeft, m.hoverIndexFor(PaneLeft)),
gap,
renderPane(m.right, m.cfg, m.palette, rightWidth, bodyHeight, m.active == PaneRight, m.hoverIndexFor(PaneRight)),
)
}
parts := make([]string, 0, 3)
if m.cfg.UI.ShowTitleBar {
parts = append(parts, renderTitleBar(m))
}
parts = append(parts, panels)
if m.cfg.UI.ShowFooter {
parts = append(parts, renderFooter(m))
}
view := lipgloss.JoinVertical(lipgloss.Left, parts...)
if m.modal.kind != modalNone {
view = overlayCenter(view, renderModal(m.modal, m.palette, min(64, m.width-8)), m.width)
}
return view
}
func (m Model) handleModalKey(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
switch m.modal.kind {
case modalMkdir:
switch {
case key.Matches(msg, m.keys.Cancel):
m.modal = modalState{}
m.status = "Cancelled"
return m, nil
case key.Matches(msg, m.keys.Confirm):
value := strings.TrimSpace(m.modal.input.Value())
if value == "" {
m.status = "Directory name must not be empty"
return m, nil
}
m.busy = true
return m, mkdirCmd(m.activePane().Path, value)
}
var cmd tea.Cmd
m.modal.input, cmd = m.modal.input.Update(msg)
return m, cmd
case modalConfirm:
switch {
case key.Matches(msg, m.keys.Cancel):
m.modal = modalState{}
m.status = "Cancelled"
return m, nil
case key.Matches(msg, m.keys.Confirm):
if m.modal.pending == nil {
m.modal = modalState{}
m.status = "Nothing to confirm"
return m, nil
}
m.busy = true
cmd := m.modal.pending.cmd()
m.modal = modalState{}
return m, cmd
}
}
return m, nil
}
func (m *Model) reloadPane(id PaneID, preserve string) error {
pane := m.paneByID(id)
entries, err := vfs.ListDir(pane.Path, vfs.ListOptions{
ShowHidden: m.cfg.Browser.ShowHidden,
DirsFirst: m.cfg.Browser.DirsFirst,
SortBy: m.cfg.Browser.Sort.By,
SortReverse: m.cfg.Browser.Sort.Reverse,
})
if err != nil {
return err
}
pane.SetEntries(entries, strings.ToLower(preserve))
return nil
}
func (m *Model) refreshAllPanes(status string) (tea.Model, tea.Cmd) {
leftSelected := selectedName(&m.left)
rightSelected := selectedName(&m.right)
if err := m.reloadPane(PaneLeft, leftSelected); err != nil {
m.status = err.Error()
return m, nil
}
if err := m.reloadPane(PaneRight, rightSelected); err != nil {
m.status = err.Error()
return m, nil
}
m.status = status
return m, m.loadPreviewCmd()
}
func (m *Model) moveCursor(delta int) {
pane := m.activePane()
pane.Move(delta, max(m.bodyHeight()-4, 1))
m.hover = hoverState{}
}
func (m *Model) enterSelected() error {
m.hover = hoverState{}
pane := m.activePane()
selected, ok := pane.Selected()
if !ok {
return nil
}
if !selected.IsDir {
m.status = "File is shown in the middle pane. Use F3 for pager or F4 for editor."
return nil
}
currentName := selected.Name
pane.Path = selected.Path
if err := m.reloadPane(pane.ID, currentName); err != nil {
return err
}
m.status = fmt.Sprintf("Entered %s", pane.Path)
return nil
}
func (m *Model) handleOpenSelected() (tea.Model, tea.Cmd) {
selected, ok := m.activePane().Selected()
if !ok {
return m, nil
}
if selected.IsDir {
if err := m.enterSelected(); err != nil {
m.status = err.Error()
return m, nil
}
return m, m.loadPreviewCmd()
}
if isEditableEntry(selected) {
return m.handleEdit()
}
return m.handleOpenExternal()
}
func (m *Model) goParent() error {
m.hover = hoverState{}
pane := m.activePane()
parent := filepath.Dir(pane.Path)
if parent == pane.Path {
return nil
}
currentName := filepath.Base(pane.Path)
pane.Path = parent
if err := m.reloadPane(pane.ID, currentName); err != nil {
return err
}
m.status = fmt.Sprintf("Moved to %s", parent)
return nil
}
func (m Model) loadPreviewCmd() tea.Cmd {
selected, ok := m.activePane().Selected()
if !ok {
return func() tea.Msg {
return previewMsg{
entryPath: "",
preview: vfs.Preview{
Kind: vfs.PreviewKindEmpty,
Title: "Nothing selected",
Body: "No entry selected.",
},
}
}
}
options := vfs.PreviewOptions{
ShowHidden: m.cfg.Browser.ShowHidden,
DirsFirst: m.cfg.Browser.DirsFirst,
SortBy: m.cfg.Browser.Sort.By,
SortReverse: m.cfg.Browser.Sort.Reverse,
MaxPreviewBytes: m.cfg.Preview.MaxPreviewBytes,
DirectoryPreviewLimit: m.cfg.Preview.DirectoryPreviewLimit,
HumanReadableSize: m.cfg.Browser.HumanReadableSize,
}
return func() tea.Msg {
return previewMsg{
entryPath: selected.Path,
preview: vfs.BuildPreview(selected, options),
}
}
}
func (m *Model) handleDirSize() (tea.Model, tea.Cmd) {
if !m.cfg.Behavior.CalculateDirSizeOnSpace {
m.status = "Directory size on Space is disabled in config"
return m, nil
}
selected, ok := m.activePane().Selected()
if !ok || !selected.IsDir || selected.IsParent {
m.status = "Select a directory first"
return m, nil
}
if selected.DirSizeKnown {
m.status = fmt.Sprintf("Directory size: %s", formatSize(selected.Size, m.cfg.Browser.HumanReadableSize))
return m, nil
}
m.busy = true
m.status = fmt.Sprintf("Calculating directory size for %s", selected.DisplayName())
return m, dirSizeCmd(selected.Path)
}
func (m *Model) handleTransfer(kind fileOpKind) (tea.Model, tea.Cmd) {
selected, ok := m.activePane().Selected()
if !ok || selected.IsParent {
m.status = fmt.Sprintf("Nothing to %s", operationVerb(kind))
return m, nil
}
targetDir := m.passivePane().Path
targetPath := filepath.Join(targetDir, filepath.Base(selected.Path))
exists, err := vfs.PathExists(targetPath)
if err != nil {
m.status = err.Error()
return m, nil
}
if exists && m.cfg.Behavior.ConfirmOverwrite {
title := fmt.Sprintf("Overwrite existing target before %s?", operationVerb(kind))
body := fmt.Sprintf("%s\n\n-> %s", selected.Path, targetPath)
note := "Enter/y to overwrite, Esc/n to cancel"
m.openConfirmModal(title, body, note, pendingOperation{
kind: kind,
sourcePath: selected.Path,
targetDir: targetDir,
overwrite: true,
})
return m, nil
}
m.busy = true
m.status = fmt.Sprintf("%s %s", strings.Title(operationVerb(kind)), selected.DisplayName())
return m, operationCmd(kind, selected.Path, targetDir, exists)
}
func (m *Model) handleDelete() (tea.Model, tea.Cmd) {
selected, ok := m.activePane().Selected()
if !ok || selected.IsParent {
m.status = "Nothing to delete"
return m, nil
}
if !m.cfg.Behavior.ConfirmDelete {
m.busy = true
m.status = fmt.Sprintf("Deleting %s", selected.DisplayName())
return m, deleteCmd(selected.Path)
}
m.openConfirmModal(
"Delete selected entry?",
selected.Path,
"Enter/y to delete permanently, Esc/n to cancel",
pendingOperation{
kind: opDelete,
sourcePath: selected.Path,
},
)
return m, nil
}
func (m *Model) handleView() (tea.Model, tea.Cmd) {
selected, ok := m.activePane().Selected()
if !ok || selected.IsParent || selected.IsDir {
m.status = "Preview refreshed"
return m, m.loadPreviewCmd()
}
command, name, err := externalCommand("PAGER", []string{"less", "more"}, selected.Path)
if err != nil {
m.status = "Preview refreshed in center pane"
return m, m.loadPreviewCmd()
}
m.status = fmt.Sprintf("Opening %s with %s", selected.DisplayName(), name)
return m, tea.ExecProcess(command, func(err error) tea.Msg {
return opMsg{kind: opView, sourcePath: selected.Path, err: err}
})
}
func (m *Model) handleOpenExternal() (tea.Model, tea.Cmd) {
selected, ok := m.activePane().Selected()
if !ok || selected.IsParent || selected.IsDir {
m.status = "Select a file to open"
return m, nil
}
command, name, err := externalCommand("", []string{"xdg-open", "open"}, selected.Path)
if err != nil {
m.status = "No system opener found (tried xdg-open/open)"
return m, nil
}
m.status = fmt.Sprintf("Opening %s with %s", selected.DisplayName(), name)
return m, tea.ExecProcess(command, func(err error) tea.Msg {
return opMsg{kind: opView, sourcePath: selected.Path, err: err}
})
}
func (m *Model) handleEdit() (tea.Model, tea.Cmd) {
selected, ok := m.activePane().Selected()
if !ok || selected.IsParent || selected.IsDir {
m.status = "Select a file to edit"
return m, nil
}
command, name, err := externalCommandFromEnv([]string{"VISUAL", "EDITOR"}, []string{"nvim", "vim", "vi", "nano"}, selected.Path)
if err != nil {
m.status = "Set $VISUAL/$EDITOR or install nvim/vim/vi/nano to enable F4 editing"
return m, nil
}
m.status = fmt.Sprintf("Opening %s with %s", selected.DisplayName(), name)
return m, tea.ExecProcess(command, func(err error) tea.Msg {
return opMsg{kind: opEdit, sourcePath: selected.Path, err: err}
})
}
func (m *Model) handleMouse(msg tea.MouseMsg) (tea.Model, tea.Cmd) {
switch {
case msg.Action == tea.MouseActionMotion:
paneID, index, ok := m.mouseTarget(msg.X, msg.Y)
if ok {
m.hover = hoverState{pane: paneID, index: index, ok: true}
} else {
m.hover = hoverState{}
}
return m, nil
case msg.Action == tea.MouseActionPress && msg.Button == tea.MouseButtonWheelUp:
if m.infoMode && m.mouseOverPreview(msg.X, msg.Y) {
m.previewModel.LineUp(3)
return m, nil
}
m.moveCursor(-1)
return m, m.loadPreviewCmd()
case msg.Action == tea.MouseActionPress && msg.Button == tea.MouseButtonWheelDown:
if m.infoMode && m.mouseOverPreview(msg.X, msg.Y) {
m.previewModel.LineDown(3)
return m, nil
}
m.moveCursor(1)
return m, m.loadPreviewCmd()
case msg.Action == tea.MouseActionPress && msg.Button == tea.MouseButtonLeft:
paneID, index, ok := m.mouseTarget(msg.X, msg.Y)
if !ok {
return m, nil
}
m.hover = hoverState{pane: paneID, index: index, ok: true}
m.active = paneID
pane := m.paneByID(paneID)
if index >= 0 && index < len(pane.Entries) {
pane.Cursor = index
pane.EnsureVisible(max(m.bodyHeight()-4, 1))
}
now := time.Now()
doubleClick := m.lastClick.pane == paneID && m.lastClick.index == index && now.Sub(m.lastClick.at) <= 450*time.Millisecond
m.lastClick = mouseClickState{pane: paneID, index: index, at: now}
if doubleClick {
return m.handleOpenSelected()
}
m.status = fmt.Sprintf("Selected %s pane", strings.ToUpper(string(paneID)))
return m, m.loadPreviewCmd()
case msg.Action == tea.MouseActionPress && msg.Button == tea.MouseButtonRight:
if m.infoMode && m.mouseOverPreview(msg.X, msg.Y) {
m.infoMode = false
m.resizePreview()
m.syncPreviewContent()
m.status = "Info mode: off"
return m, nil
}
paneID, index, ok := m.mouseTarget(msg.X, msg.Y)
if !ok {
return m, nil
}
if m.infoMode && paneID == m.active && index == m.activePane().Cursor {
m.infoMode = false
m.hover = hoverState{pane: paneID, index: index, ok: true}
m.status = "Info mode: off"
return m, nil
}
m.hover = hoverState{pane: paneID, index: index, ok: true}
m.active = paneID
pane := m.paneByID(paneID)
if index >= 0 && index < len(pane.Entries) {
pane.Cursor = index
pane.EnsureVisible(max(m.bodyHeight()-4, 1))
}
m.infoMode = true
m.resizePreview()
m.syncPreviewContent()
m.status = fmt.Sprintf("Info mode: %s selection", strings.ToUpper(string(paneID)))
return m, m.loadPreviewCmd()
default:
return m, nil
}
}
func (m *Model) toggleInfo() (tea.Model, tea.Cmd) {
m.infoMode = !m.infoMode
m.resizePreview()
m.syncPreviewContent()
if m.infoMode {
m.status = fmt.Sprintf("Info mode: %s selection", strings.ToUpper(string(m.active)))
return m, m.loadPreviewCmd()
}
if m.selectMode {
m.selectMode = false
return m, enableMouseCmd()
}
m.status = "Info mode: off"
return m, nil
}
func (m *Model) toggleSelectMode() (tea.Model, tea.Cmd) {
if m.selectMode {
m.selectMode = false
m.status = "Text selection mode: off"
return m, enableMouseCmd()
}
if !m.infoMode || m.previewData.Kind != vfs.PreviewKindText {
m.status = "Text selection mode works only for text preview in info pane"
return m, nil
}
m.selectMode = true
m.status = "Text selection mode: on"
return m, disableMouseCmd()
}
func (m *Model) toggleHidden() (tea.Model, tea.Cmd) {
m.cfg.Browser.ShowHidden = !m.cfg.Browser.ShowHidden
return m.refreshAllPanes(fmt.Sprintf("Show hidden: %t", m.cfg.Browser.ShowHidden))
}
func (m *Model) cycleTheme() (tea.Model, tea.Cmd) {
next := theme.Next(m.cfg.UI.Theme)
palette, err := theme.Resolve(next)
if err != nil {
m.status = err.Error()
return m, nil
}
m.cfg.UI.Theme = next
m.palette = palette
m.status = fmt.Sprintf("Theme: %s", next)
return m, nil
}
func (m *Model) cycleSort() (tea.Model, tea.Cmd) {
order := []string{"name", "modified", "size", "created", "extension"}
current := strings.ToLower(strings.TrimSpace(m.cfg.Browser.Sort.By))
next := order[0]
for idx, value := range order {
if value == current {
next = order[(idx+1)%len(order)]
break
}
}
m.cfg.Browser.Sort.By = next
return m.refreshAllPanes(fmt.Sprintf("Sort: %s", next))
}
func (m *Model) openMkdirModal() {
input := textinput.New()
input.Placeholder = "new-directory"
input.Focus()
input.CharLimit = 128
input.Width = 42
m.modal = modalState{
kind: modalMkdir,
title: "Create directory",
body: fmt.Sprintf("Active pane: %s", m.activePane().Path),
note: "Enter to confirm, Esc to cancel",
input: input,
}
}
func (m *Model) openConfirmModal(title, body, note string, pending pendingOperation) {
m.modal = modalState{
kind: modalConfirm,
title: title,
body: body,
note: note,
pending: &pending,
}
}
func (m *Model) applyDirSize(path string, size int64) {
for _, pane := range []*BrowserPane{&m.left, &m.right} {
for idx := range pane.Entries {
if pane.Entries[idx].Path == path {
pane.Entries[idx].Size = size
pane.Entries[idx].DirSizeKnown = true
}
}
}
}
func (m *Model) applyPreview(preview vfs.Preview) {
m.previewData = preview
m.syncPreviewContent()
}
func (m *Model) syncPreviewContent() {
content := m.previewData.Body
if m.cfg.Preview.WrapText && m.previewModel.Width > 0 {
content = lipgloss.NewStyle().Width(m.previewModel.Width).Render(content)
}
m.previewModel.SetContent(content)
}
func (m *Model) activePane() *BrowserPane {
if m.active == PaneLeft {
return &m.left
}
return &m.right
}
func (m *Model) passivePane() *BrowserPane {
if m.active == PaneLeft {
return &m.right
}
return &m.left
}
func (m *Model) paneByID(id PaneID) *BrowserPane {
if id == PaneLeft {
return &m.left
}
return &m.right
}
func (m *Model) layoutWidths() (int, int, int) {
total := m.width
gaps := m.cfg.UI.PaneGap
usable := max(total-gaps, 60)
left := usable / 2
right := usable - left
if m.active == PaneLeft {
if m.infoMode {
return left, right, 0
}
return left, 0, right
}
if m.infoMode {
return 0, left, right
}
return left, 0, right
}
func (m *Model) bodyHeight() int {
height := m.height
if m.cfg.UI.ShowTitleBar {
height--
}
if m.cfg.UI.ShowFooter {
height--
}
return max(height, 8)
}
func (m *Model) resizePreview() {
_, previewWidth, _ := m.layoutWidths()
metaHeight := 0
if m.cfg.Preview.ShowMetadata {
metaHeight = 7
}
innerWidth := max(previewWidth-2, 1)
innerHeight := max(m.bodyHeight()-2, 1)
m.previewModel.Width = max(innerWidth-2, 10)
m.previewModel.Height = max(innerHeight-metaHeight-3, 3)
}
func renderPreviewPane(preview vfs.Preview, viewportModel *viewport.Model, cfg config.Config, palette theme.Palette, width int, height int) string {
innerWidth := max(width-2, 1)
innerHeight := max(height-2, 1)
box := lipgloss.NewStyle().
Width(innerWidth).
Height(innerHeight).
Background(palette.Panel).
Foreground(palette.Text).
BorderStyle(borderStyle(cfg.UI.Border)).
BorderForeground(palette.BorderActive)
title := lipgloss.NewStyle().
Width(innerWidth).
Padding(0, 1).
Background(palette.Accent).
Foreground(palette.Background).
Bold(true).
Render("PREVIEW " + previewIcon(preview) + " " + preview.Title)
parts := []string{title}
usedHeight := lipgloss.Height(title)
if cfg.Preview.ShowMetadata {
metaView := renderMetadata(preview.Metadata, palette, innerWidth)
parts = append(parts, metaView)
usedHeight += lipgloss.Height(metaView)
}
contentHeight := max(innerHeight-usedHeight, 3)
viewportModel.Width = max(innerWidth-2, 10)
viewportModel.Height = max(contentHeight-3, 1)
parts = append(parts, renderPreviewContent(viewportModel, palette, innerWidth, contentHeight))
return box.Render(lipgloss.JoinVertical(lipgloss.Left, parts...))
}
func renderMetadata(meta vfs.Metadata, palette theme.Palette, width int) string {
leftRows := []string{
fmt.Sprintf("kind: %s", fallback(meta.Kind, "n/a")),
fmt.Sprintf("size: %s", metaSize(meta)),
fmt.Sprintf("created: %s", fallback(meta.CreatedAt, "n/a")),
}
rightRows := []string{
fmt.Sprintf("modified: %s", fallback(meta.ModifiedAt, "n/a")),
fmt.Sprintf("mode: %s", fallback(meta.Permissions, "n/a")),
}
if meta.ImageFormat != "" {
rightRows = append(rightRows, fmt.Sprintf("image: %s %s", meta.ImageFormat, meta.ImageSize))
}
leftWidth := max(width/2, 18)
rightWidth := max(width-leftWidth, 18)
left := lipgloss.NewStyle().
Width(leftWidth).
Foreground(palette.Muted).
Render(strings.Join(leftRows, "\n"))
right := lipgloss.NewStyle().
Width(rightWidth).
Foreground(palette.Text).
Render(strings.Join(rightRows, "\n"))
pathLine := lipgloss.NewStyle().
Width(width).
Foreground(palette.Text).
Render(fmt.Sprintf("path: %s", truncateMiddle(meta.Path, max(width-8, 16))))
return lipgloss.NewStyle().
Width(width).
Padding(0, 1).
Background(palette.PanelElevated).
BorderStyle(lipgloss.NormalBorder()).
BorderBottom(true).
BorderForeground(palette.Border).
Render(lipgloss.JoinVertical(
lipgloss.Left,
lipgloss.JoinHorizontal(lipgloss.Top, left, right),
"",
pathLine,
))
}
func renderTitleBar(m Model) string {
left := lipgloss.NewStyle().
Foreground(m.palette.Background).
Background(m.palette.Accent).
Bold(true).
Padding(0, 1).
Render(strings.ToUpper(m.cfg.UI.AppTitle))
centerParts := []string{
fmt.Sprintf("theme:%s", m.cfg.UI.Theme),
fmt.Sprintf("hidden:%t", m.cfg.Browser.ShowHidden),
fmt.Sprintf("sort:%s", m.cfg.Browser.Sort.By),
fmt.Sprintf("info:%t", m.infoMode),
}
center := lipgloss.NewStyle().
Foreground(m.palette.Text).
Background(m.palette.Panel).
Padding(0, 1).
Render(strings.Join(centerParts, " "))
configLabel := "cfg:default"
if m.configPath != "" {
configLabel = "cfg:" + filepath.Base(m.configPath)
}
right := lipgloss.NewStyle().
Foreground(m.palette.Muted).
Background(m.palette.Panel).
Padding(0, 1).
Render(configLabel)
fillWidth := max(m.width-lipgloss.Width(left)-lipgloss.Width(center)-lipgloss.Width(right), 0)
fill := lipgloss.NewStyle().
Width(fillWidth).
Background(m.palette.Panel).
Render("")
return left + center + fill + right
}
func renderStatus(m Model) string {
active := m.activePane()
selected, _ := active.Selected()
summary := fmt.Sprintf(
"%s | %s | items:%d | selected:%s",
strings.ToUpper(string(m.active)),
compactPath(active.Path, m.cfg.UI.PathDisplay),
len(active.Entries),
fallback(selected.DisplayName(), "n/a"),
)
return lipgloss.NewStyle().
Width(m.width).
Padding(0, 1).
Background(m.palette.PanelInactive).
Foreground(m.palette.Text).
Render(summary + " :: " + m.status)
}
func renderFooter(m Model) string {
helpModel := m.helpModel
helpModel.Width = max(m.width-4, 20)
helpView := helpModel.View(m.keys)
modeLabel := ""
if m.selectMode {
modeLabel = lipgloss.NewStyle().
Foreground(m.palette.Accent).
Bold(true).
Render(" SELECT TEXT MODE")
}
return lipgloss.NewStyle().
Width(m.width).
Padding(0, 1).
Background(m.palette.Panel).
Render(lipgloss.JoinHorizontal(lipgloss.Top, helpView, modeLabel))
}
func renderModal(modal modalState, palette theme.Palette, width int) string {
box := lipgloss.NewStyle().
Width(width).
Padding(1, 2).
Background(palette.Panel).
Foreground(palette.Text).
BorderStyle(lipgloss.DoubleBorder()).
BorderForeground(palette.BorderActive)
lines := []string{
lipgloss.NewStyle().Bold(true).Foreground(palette.Accent).Render(modal.title),
lipgloss.NewStyle().Foreground(palette.Muted).Render(modal.body),
}
if modal.kind == modalMkdir {
lines = append(lines, modal.input.View())
}
if modal.note != "" {
lines = append(lines, lipgloss.NewStyle().Foreground(palette.Muted).Render(modal.note))
}
return box.Render(strings.Join(lines, "\n\n"))
}
func overlayCenter(base string, overlay string, width int) string {
if width <= 0 {
return base + "\n" + overlay
}
centered := lipgloss.Place(width, lipgloss.Height(overlay), lipgloss.Center, lipgloss.Top, overlay)
return base + "\n" + centered
}
func renderPreviewContent(viewportModel *viewport.Model, palette theme.Palette, width int, height int) string {
innerHeight := max(height-1, 1)
header := lipgloss.NewStyle().
Width(width).
Padding(0, 1).
Background(palette.PanelInactive).
Foreground(palette.FooterKey).
Bold(true).
Render("CONTENT")
body := lipgloss.NewStyle().
Width(width).
Height(max(innerHeight-lipgloss.Height(header), 1)).
Padding(0, 1).
Background(palette.Panel).
Render(viewportModel.View())
return lipgloss.NewStyle().
Width(width).
Height(innerHeight).
BorderStyle(lipgloss.NormalBorder()).
BorderTop(true).
BorderForeground(palette.Border).
Render(lipgloss.JoinVertical(lipgloss.Left, header, body))
}
func previewIcon(preview vfs.Preview) string {
switch preview.Kind {
case vfs.PreviewKindDirectory:
return ""
case vfs.PreviewKindImage:
return "󰋩"
case vfs.PreviewKindText:
return "󰈙"
case vfs.PreviewKindBinary:
return "󰈔"
case vfs.PreviewKindError:
return ""
default:
return "󰇙"
}
}
func (p pendingOperation) cmd() tea.Cmd {
switch p.kind {
case opCopy:
return copyCmd(p.sourcePath, p.targetDir, p.overwrite)
case opMove:
return moveCmd(p.sourcePath, p.targetDir, p.overwrite)
case opDelete:
return deleteCmd(p.sourcePath)
default:
return nil
}
}
func operationCmd(kind fileOpKind, sourcePath, targetDir string, overwrite bool) tea.Cmd {
switch kind {
case opCopy:
return copyCmd(sourcePath, targetDir, overwrite)
case opMove:
return moveCmd(sourcePath, targetDir, overwrite)
default:
return nil
}
}
func dirSizeCmd(path string) tea.Cmd {
return func() tea.Msg {
size, err := vfs.DirectorySize(path)
return dirSizeMsg{path: path, size: size, err: err}
}
}
func copyCmd(sourcePath, targetDir string, overwrite bool) tea.Cmd {
return func() tea.Msg {
targetPath, err := vfs.CopyPath(sourcePath, targetDir, overwrite)
return opMsg{kind: opCopy, sourcePath: sourcePath, targetPath: targetPath, err: err}
}
}
func moveCmd(sourcePath, targetDir string, overwrite bool) tea.Cmd {
return func() tea.Msg {
targetPath, err := vfs.MovePath(sourcePath, targetDir, overwrite)
return opMsg{kind: opMove, sourcePath: sourcePath, targetPath: targetPath, err: err}
}
}
func deleteCmd(path string) tea.Cmd {
return func() tea.Msg {
err := vfs.DeletePath(path)
return opMsg{kind: opDelete, sourcePath: path, err: err}
}
}
func mkdirCmd(parent, name string) tea.Cmd {
return func() tea.Msg {
targetPath, err := vfs.MakeDir(parent, name)
return opMsg{kind: opMkdir, targetPath: targetPath, err: err}
}
}
func selectedName(pane *BrowserPane) string {
selected, ok := pane.Selected()
if !ok {
return ""
}
return selected.Name
}
func metaSize(meta vfs.Metadata) string {
if !meta.SizeKnown {
return "press Space"
}
return vfs.HumanSize(meta.Size)
}
func fallback(value string, defaultValue string) string {
if strings.TrimSpace(value) == "" {
return defaultValue
}
return value
}
func formatSize(size int64, human bool) string {
if human {
return vfs.HumanSize(size)
}
return fmt.Sprintf("%d", size)
}
func operationVerb(kind fileOpKind) string {
switch kind {
case opCopy:
return "copy"
case opMove:
return "move"
case opDelete:
return "delete"
default:
return "operate on"
}
}
func externalCommand(envVar string, fallbacks []string, path string) (*exec.Cmd, string, error) {
envVars := []string{}
if envVar != "" {
envVars = append(envVars, envVar)
}
return externalCommandFromEnv(envVars, fallbacks, path)
}
func externalCommandFromEnv(envVars []string, fallbacks []string, path string) (*exec.Cmd, string, error) {
commandLine := ""
source := "fallbacks"
for _, envVar := range envVars {
commandLine = strings.TrimSpace(os.Getenv(envVar))
if commandLine != "" {
source = envVar
break
}
}
if commandLine == "" {
for _, candidate := range fallbacks {
if resolved, err := exec.LookPath(candidate); err == nil {
commandLine = resolved
source = candidate
break
}
}
}
if commandLine == "" {
if len(envVars) > 0 {
return nil, "", fmt.Errorf("no command for %s", strings.Join(envVars, "/"))
}
return nil, "", fmt.Errorf("no fallback command found")
}
parts := strings.Fields(commandLine)
if len(parts) == 0 {
return nil, "", fmt.Errorf("invalid command for %s", source)
}
args := append(parts[1:], path)
return exec.Command(parts[0], args...), filepath.Base(parts[0]), nil
}
func enableMouseCmd() tea.Cmd {
return func() tea.Msg {
return tea.EnableMouseCellMotion()
}
}
func disableMouseCmd() tea.Cmd {
return func() tea.Msg {
return tea.DisableMouse()
}
}
func resolveStartPath(raw string, fallback string) (string, error) {
value := strings.TrimSpace(raw)
if value == "" {
return fallback, nil
}
if strings.HasPrefix(value, "~/") {
home, err := os.UserHomeDir()
if err != nil {
return "", err
}
value = filepath.Join(home, strings.TrimPrefix(value, "~/"))
}
abs, err := filepath.Abs(value)
if err != nil {
return "", err
}
info, err := os.Stat(abs)
if err != nil {
return "", err
}
if !info.IsDir() {
return "", fmt.Errorf("startup path is not a directory: %s", abs)
}
return abs, nil
}
func min(a, b int) int {
if a < b {
return a
}
return b
}
func max(a, b int) int {
if a > b {
return a
}
return b
}
func (m *Model) mouseTarget(x, y int) (PaneID, int, bool) {
if m.width <= 0 || m.height <= 0 {
return "", 0, false
}
leftWidth, previewWidth, rightWidth := m.layoutWidths()
top := 0
if m.cfg.UI.ShowTitleBar {
top++
}
bodyHeight := m.bodyHeight()
if y < top || y >= top+bodyHeight {
return "", 0, false
}
gap := m.cfg.UI.PaneGap
leftStart := 0
rightStart := leftWidth + gap
if m.infoMode && m.active == PaneRight {
rightStart = previewWidth + gap
}
switch {
case x >= leftStart && x < leftStart+leftWidth:
if m.infoMode && m.active == PaneRight {
return "", 0, false
}
index, ok := paneIndexFromMouse(y-top, bodyHeight, &m.left)
if !ok {
return "", 0, false
}
return PaneLeft, index, true
case x >= rightStart && x < rightStart+rightWidth:
if m.infoMode && m.active == PaneLeft {
return "", 0, false
}
index, ok := paneIndexFromMouse(y-top, bodyHeight, &m.right)
if !ok {
return "", 0, false
}
return PaneRight, index, true
default:
return "", 0, false
}
}
func paneIndexFromMouse(localY int, height int, pane *BrowserPane) (int, bool) {
const listStartY = 3
if localY < listStartY || localY >= height-1 {
return 0, false
}
row := localY - listStartY
index := pane.Offset + row
if index < 0 {
index = 0
}
if index >= len(pane.Entries) {
return 0, false
}
return index, true
}
func isEditableEntry(entry vfs.Entry) bool {
switch entry.Category() {
case "text", "config", "executable":
return true
default:
return false
}
}
func (m *Model) hoverIndexFor(pane PaneID) int {
if m.hover.ok && m.hover.pane == pane {
return m.hover.index
}
return -1
}
func (m *Model) mouseOverPreview(x, y int) bool {
if !m.infoMode || m.width <= 0 || m.height <= 0 {
return false
}
leftWidth, previewWidth, _ := m.layoutWidths()
top := 0
if m.cfg.UI.ShowTitleBar {
top++
}
bodyHeight := m.bodyHeight()
if y < top || y >= top+bodyHeight {
return false
}
gap := m.cfg.UI.PaneGap
if m.active == PaneLeft {
startX := leftWidth + gap
return x >= startX && x < startX+previewWidth
}
return x >= 0 && x < previewWidth
}