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ui.go
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package main
import (
"bytes"
"fmt"
"io"
"log"
"os"
"path/filepath"
"sort"
"strconv"
"strings"
"text/tabwriter"
"time"
"unicode"
"unicode/utf8"
"github.com/gdamore/tcell/v2"
"github.com/mattn/go-runewidth"
"golang.org/x/term"
)
const gEscapeCode = 27
var gKeyVal = map[tcell.Key]string{
tcell.KeyEnter: "<enter>",
tcell.KeyBackspace: "<backspace>",
tcell.KeyTab: "<tab>",
tcell.KeyBacktab: "<backtab>",
tcell.KeyEsc: "<esc>",
tcell.KeyBackspace2: "<backspace2>",
tcell.KeyDelete: "<delete>",
tcell.KeyInsert: "<insert>",
tcell.KeyUp: "<up>",
tcell.KeyDown: "<down>",
tcell.KeyLeft: "<left>",
tcell.KeyRight: "<right>",
tcell.KeyHome: "<home>",
tcell.KeyEnd: "<end>",
tcell.KeyUpLeft: "<upleft>",
tcell.KeyUpRight: "<upright>",
tcell.KeyDownLeft: "<downleft>",
tcell.KeyDownRight: "<downright>",
tcell.KeyCenter: "<center>",
tcell.KeyPgDn: "<pgdn>",
tcell.KeyPgUp: "<pgup>",
tcell.KeyClear: "<clear>",
tcell.KeyExit: "<exit>",
tcell.KeyCancel: "<cancel>",
tcell.KeyPause: "<pause>",
tcell.KeyPrint: "<print>",
tcell.KeyF1: "<f-1>",
tcell.KeyF2: "<f-2>",
tcell.KeyF3: "<f-3>",
tcell.KeyF4: "<f-4>",
tcell.KeyF5: "<f-5>",
tcell.KeyF6: "<f-6>",
tcell.KeyF7: "<f-7>",
tcell.KeyF8: "<f-8>",
tcell.KeyF9: "<f-9>",
tcell.KeyF10: "<f-10>",
tcell.KeyF11: "<f-11>",
tcell.KeyF12: "<f-12>",
tcell.KeyF13: "<f-13>",
tcell.KeyF14: "<f-14>",
tcell.KeyF15: "<f-15>",
tcell.KeyF16: "<f-16>",
tcell.KeyF17: "<f-17>",
tcell.KeyF18: "<f-18>",
tcell.KeyF19: "<f-19>",
tcell.KeyF20: "<f-20>",
tcell.KeyF21: "<f-21>",
tcell.KeyF22: "<f-22>",
tcell.KeyF23: "<f-23>",
tcell.KeyF24: "<f-24>",
tcell.KeyF25: "<f-25>",
tcell.KeyF26: "<f-26>",
tcell.KeyF27: "<f-27>",
tcell.KeyF28: "<f-28>",
tcell.KeyF29: "<f-29>",
tcell.KeyF30: "<f-30>",
tcell.KeyF31: "<f-31>",
tcell.KeyF32: "<f-32>",
tcell.KeyF33: "<f-33>",
tcell.KeyF34: "<f-34>",
tcell.KeyF35: "<f-35>",
tcell.KeyF36: "<f-36>",
tcell.KeyF37: "<f-37>",
tcell.KeyF38: "<f-38>",
tcell.KeyF39: "<f-39>",
tcell.KeyF40: "<f-40>",
tcell.KeyF41: "<f-41>",
tcell.KeyF42: "<f-42>",
tcell.KeyF43: "<f-43>",
tcell.KeyF44: "<f-44>",
tcell.KeyF45: "<f-45>",
tcell.KeyF46: "<f-46>",
tcell.KeyF47: "<f-47>",
tcell.KeyF48: "<f-48>",
tcell.KeyF49: "<f-49>",
tcell.KeyF50: "<f-50>",
tcell.KeyF51: "<f-51>",
tcell.KeyF52: "<f-52>",
tcell.KeyF53: "<f-53>",
tcell.KeyF54: "<f-54>",
tcell.KeyF55: "<f-55>",
tcell.KeyF56: "<f-56>",
tcell.KeyF57: "<f-57>",
tcell.KeyF58: "<f-58>",
tcell.KeyF59: "<f-59>",
tcell.KeyF60: "<f-60>",
tcell.KeyF61: "<f-61>",
tcell.KeyF62: "<f-62>",
tcell.KeyF63: "<f-63>",
tcell.KeyF64: "<f-64>",
tcell.KeyCtrlA: "<c-a>",
tcell.KeyCtrlB: "<c-b>",
tcell.KeyCtrlC: "<c-c>",
tcell.KeyCtrlD: "<c-d>",
tcell.KeyCtrlE: "<c-e>",
tcell.KeyCtrlF: "<c-f>",
tcell.KeyCtrlG: "<c-g>",
tcell.KeyCtrlJ: "<c-j>",
tcell.KeyCtrlK: "<c-k>",
tcell.KeyCtrlL: "<c-l>",
tcell.KeyCtrlN: "<c-n>",
tcell.KeyCtrlO: "<c-o>",
tcell.KeyCtrlP: "<c-p>",
tcell.KeyCtrlQ: "<c-q>",
tcell.KeyCtrlR: "<c-r>",
tcell.KeyCtrlS: "<c-s>",
tcell.KeyCtrlT: "<c-t>",
tcell.KeyCtrlU: "<c-u>",
tcell.KeyCtrlV: "<c-v>",
tcell.KeyCtrlW: "<c-w>",
tcell.KeyCtrlX: "<c-x>",
tcell.KeyCtrlY: "<c-y>",
tcell.KeyCtrlZ: "<c-z>",
tcell.KeyCtrlSpace: "<c-space>",
tcell.KeyCtrlUnderscore: "<c-_>",
tcell.KeyCtrlRightSq: "<c-]>",
tcell.KeyCtrlBackslash: "<c-\\>",
tcell.KeyCtrlCarat: "<c-^>",
}
var gValKey map[string]tcell.Key
func init() {
gValKey = make(map[string]tcell.Key)
for k, v := range gKeyVal {
gValKey[v] = k
}
}
type win struct {
w, h, x, y int
}
func newWin(w, h, x, y int) *win {
return &win{w, h, x, y}
}
func (win *win) renew(w, h, x, y int) {
win.w, win.h, win.x, win.y = w, h, x, y
}
func printLength(s string) int {
ind := 0
off := 0
for i := 0; i < len(s); i++ {
r, w := utf8.DecodeRuneInString(s[i:])
if r == gEscapeCode && i+1 < len(s) && s[i+1] == '[' {
j := strings.IndexAny(s[i:min(len(s), i+64)], "mK")
if j == -1 {
continue
}
i += j
continue
}
i += w - 1
if r == '\t' {
ind += gOpts.tabstop - (ind-off)%gOpts.tabstop
} else {
ind += runewidth.RuneWidth(r)
}
}
return ind
}
func (win *win) print(screen tcell.Screen, x, y int, st tcell.Style, s string) tcell.Style {
off := x
var comb []rune
for i := 0; i < len(s); i++ {
r, w := utf8.DecodeRuneInString(s[i:])
if r == gEscapeCode && i+1 < len(s) && s[i+1] == '[' {
j := strings.IndexAny(s[i:min(len(s), i+64)], "mK")
if j == -1 {
continue
}
if s[i+j] == 'm' {
st = applyAnsiCodes(s[i+2:i+j], st)
}
i += j
continue
}
for {
rc, wc := utf8.DecodeRuneInString(s[i+w:])
if !unicode.Is(unicode.Mn, rc) {
break
}
comb = append(comb, rc)
i += wc
}
if x < win.w {
screen.SetContent(win.x+x, win.y+y, r, comb, st)
comb = nil
}
i += w - 1
if r == '\t' {
s := gOpts.tabstop - (x-off)%gOpts.tabstop
for i := 0; i < s && x+i < win.w; i++ {
screen.SetContent(win.x+x+i, win.y+y, ' ', nil, st)
}
x += s
} else {
x += runewidth.RuneWidth(r)
}
}
return st
}
func (win *win) printf(screen tcell.Screen, x, y int, st tcell.Style, format string, a ...interface{}) {
win.print(screen, x, y, st, fmt.Sprintf(format, a...))
}
func (win *win) printLine(screen tcell.Screen, x, y int, st tcell.Style, s string) {
win.printf(screen, x, y, st, "%s%*s", s, win.w-printLength(s), "")
}
func (win *win) printRight(screen tcell.Screen, y int, st tcell.Style, s string) {
win.print(screen, win.w-printLength(s), y, st, s)
}
func (win *win) printReg(screen tcell.Screen, reg *reg) {
if reg == nil {
return
}
st := tcell.StyleDefault
if reg.loading {
st = st.Reverse(true)
win.print(screen, 2, 0, st, "loading...")
return
}
for i, l := range reg.lines {
if i > win.h-1 {
break
}
st = win.print(screen, 2, i, st, l)
}
}
var gThisYear = time.Now().Year()
func infotimefmt(t time.Time) string {
if t.Year() == gThisYear {
return t.Format("Jan _2 15:04")
}
return t.Format("Jan _2 2006")
}
func fileInfo(f *file, d *dir) string {
var info string
path := filepath.Join(d.path, f.Name())
for _, s := range gOpts.info {
switch s {
case "size":
if !(gOpts.dircounts && f.IsDir()) {
info = fmt.Sprintf("%s %4s", info, humanize(f.Size()))
continue
}
if f.dirCount == -1 {
d, err := os.Open(path)
if err != nil {
f.dirCount = -2
}
names, err := d.Readdirnames(1000)
d.Close()
if names == nil && err != io.EOF {
f.dirCount = -2
} else {
f.dirCount = len(names)
}
}
switch {
case f.dirCount < 0:
info = fmt.Sprintf("%s ?", info)
case f.dirCount < 1000:
info = fmt.Sprintf("%s %4d", info, f.dirCount)
default:
info = fmt.Sprintf("%s 999+", info)
}
case "time":
info = fmt.Sprintf("%s %12s", info, infotimefmt(f.ModTime()))
case "atime":
info = fmt.Sprintf("%s %12s", info, infotimefmt(f.accessTime))
case "ctime":
info = fmt.Sprintf("%s %12s", info, infotimefmt(f.changeTime))
default:
log.Printf("unknown info type: %s", s)
}
}
return info
}
func (win *win) printDir(screen tcell.Screen, dir *dir, selections map[string]int, saves map[string]bool, colors styleMap, icons iconMap) {
if win.w < 5 || dir == nil {
return
}
if dir.noPerm {
win.print(screen, 2, 0, tcell.StyleDefault.Reverse(true), "permission denied")
return
}
if dir.loading && len(dir.files) == 0 {
win.print(screen, 2, 0, tcell.StyleDefault.Reverse(true), "loading...")
return
}
if len(dir.files) == 0 {
win.print(screen, 2, 0, tcell.StyleDefault.Reverse(true), "empty")
return
}
beg := max(dir.ind-dir.pos, 0)
end := min(beg+win.h, len(dir.files))
if beg > end {
return
}
var lnwidth int
var lnformat string
if gOpts.number || gOpts.relativenumber {
lnwidth = 1
if gOpts.number && gOpts.relativenumber {
lnwidth++
}
for j := 10; j < len(dir.files); j *= 10 {
lnwidth++
}
lnformat = fmt.Sprintf("%%%d.d ", lnwidth)
}
for i, f := range dir.files[beg:end] {
st := colors.get(f)
if lnwidth > 0 {
var ln string
if gOpts.number && (!gOpts.relativenumber) {
ln = fmt.Sprintf(lnformat, i+1+beg)
} else if gOpts.relativenumber {
switch {
case i < dir.pos:
ln = fmt.Sprintf(lnformat, dir.pos-i)
case i > dir.pos:
ln = fmt.Sprintf(lnformat, i-dir.pos)
case gOpts.number:
ln = fmt.Sprintf(fmt.Sprintf("%%%d.d ", lnwidth-1), i+1+beg)
default:
ln = ""
}
}
win.print(screen, 0, i, tcell.StyleDefault.Foreground(tcell.ColorOlive), ln)
}
path := filepath.Join(dir.path, f.Name())
if _, ok := selections[path]; ok {
win.print(screen, lnwidth, i, st.Background(tcell.ColorPurple), " ")
} else if cp, ok := saves[path]; ok {
if cp {
win.print(screen, lnwidth, i, st.Background(tcell.ColorOlive), " ")
} else {
win.print(screen, lnwidth, i, st.Background(tcell.ColorMaroon), " ")
}
}
if i == dir.pos {
st = st.Reverse(true)
}
var s []rune
s = append(s, ' ')
var iwidth int
if gOpts.icons {
s = append(s, []rune(icons.get(f))...)
s = append(s, ' ')
iwidth = 2
}
for _, r := range f.Name() {
s = append(s, r)
}
w := runeSliceWidth(s)
if w > win.w-3 {
s = runeSliceWidthRange(s, 0, win.w-4)
s = append(s, []rune(gOpts.truncatechar)...)
} else {
for i := 0; i < win.w-3-w; i++ {
s = append(s, ' ')
}
}
info := fileInfo(f, dir)
if len(info) > 0 && win.w-lnwidth-iwidth-2 > 2*len(info) {
if win.w-2 > w+len(info) {
s = runeSliceWidthRange(s, 0, win.w-3-len(info)-lnwidth)
} else {
s = runeSliceWidthRange(s, 0, win.w-4-len(info)-lnwidth)
s = append(s, []rune(gOpts.truncatechar)...)
}
for _, r := range info {
s = append(s, r)
}
}
s = append(s, ' ')
win.print(screen, lnwidth+1, i, st, string(s))
}
}
type ui struct {
screen tcell.Screen
wins []*win
promptWin *win
msgWin *win
menuWin *win
msg string
regPrev *reg
dirPrev *dir
exprChan chan expr
keyChan chan string
tevChan chan tcell.Event
evChan chan tcell.Event
menuBuf *bytes.Buffer
menuSelected int
cmdPrefix string
cmdAccLeft []rune
cmdAccRight []rune
cmdYankBuf []rune
cmdTmp []rune
keyAcc []rune
keyCount []rune
styles styleMap
icons iconMap
}
func getWidths(wtot int) []int {
rsum := 0
for _, r := range gOpts.ratios {
rsum += r
}
wlen := len(gOpts.ratios)
widths := make([]int, wlen)
wsum := 0
for i := 0; i < wlen-1; i++ {
widths[i] = gOpts.ratios[i] * wtot / rsum
wsum += widths[i]
}
widths[wlen-1] = wtot - wsum
if gOpts.drawbox {
widths[wlen-1]--
}
return widths
}
func getWins(screen tcell.Screen) []*win {
wtot, htot := screen.Size()
var wins []*win
widths := getWidths(wtot)
wacc := 0
wlen := len(widths)
for i := 0; i < wlen; i++ {
if gOpts.drawbox {
wins = append(wins, newWin(widths[i], htot-4, wacc+1, 2))
} else {
wins = append(wins, newWin(widths[i], htot-2, wacc, 1))
}
wacc += widths[i]
}
return wins
}
func newUI(screen tcell.Screen) *ui {
wtot, htot := screen.Size()
ui := &ui{
screen: screen,
wins: getWins(screen),
promptWin: newWin(wtot, 1, 0, 0),
msgWin: newWin(wtot, 1, 0, htot-1),
menuWin: newWin(wtot, 1, 0, htot-2),
exprChan: make(chan expr, 1000),
keyChan: make(chan string, 1000),
tevChan: make(chan tcell.Event, 1000),
evChan: make(chan tcell.Event, 1000),
styles: parseStyles(),
icons: parseIcons(),
menuSelected: -2,
}
go ui.pollEvents()
return ui
}
func (ui *ui) pollEvents() {
var ev tcell.Event
for {
ev = ui.screen.PollEvent()
if ev == nil {
return
}
ui.tevChan <- ev
}
}
func (ui *ui) renew() {
wtot, htot := ui.screen.Size()
widths := getWidths(wtot)
wacc := 0
wlen := len(widths)
for i := 0; i < wlen; i++ {
if gOpts.drawbox {
ui.wins[i].renew(widths[i], htot-4, wacc+1, 2)
} else {
ui.wins[i].renew(widths[i], htot-2, wacc, 1)
}
wacc += widths[i]
}
ui.promptWin.renew(wtot, 1, 0, 0)
ui.msgWin.renew(wtot, 1, 0, htot-1)
ui.menuWin.renew(wtot, 1, 0, htot-2)
}
func (ui *ui) sort() {
if ui.dirPrev == nil {
return
}
name := ui.dirPrev.name()
ui.dirPrev.sort()
ui.dirPrev.sel(name, ui.wins[0].h)
}
func (ui *ui) echo(msg string) {
ui.msg = msg
}
func (ui *ui) echof(format string, a ...interface{}) {
ui.echo(fmt.Sprintf(format, a...))
}
func (ui *ui) echomsg(msg string) {
ui.msg = msg
log.Print(msg)
}
func (ui *ui) echomsgf(format string, a ...interface{}) {
ui.echomsg(fmt.Sprintf(format, a...))
}
func (ui *ui) echoerr(msg string) {
ui.msg = fmt.Sprintf(gOpts.errorfmt, msg)
log.Printf("error: %s", msg)
}
func (ui *ui) echoerrf(format string, a ...interface{}) {
ui.echoerr(fmt.Sprintf(format, a...))
}
type reg struct {
loading bool
volatile bool
loadTime time.Time
path string
lines []string
}
func (ui *ui) loadFile(nav *nav, volatile bool) {
curr, err := nav.currFile()
if err != nil {
return
}
if !gOpts.preview {
return
}
if volatile {
nav.previewChan <- ""
}
if curr.IsDir() {
ui.dirPrev = nav.loadDir(curr.path)
} else if curr.Mode().IsRegular() {
ui.regPrev = nav.loadReg(curr.path, volatile)
}
}
func (ui *ui) loadFileInfo(nav *nav) {
curr, err := nav.currFile()
if err != nil {
return
}
var linkTarget string
if curr.linkTarget != "" {
linkTarget = " -> " + curr.linkTarget
}
ui.echof("%v %v%v%v%4s %v%s",
curr.Mode(),
linkCount(curr), // optional
userName(curr), // optional
groupName(curr), // optional
humanize(curr.Size()),
curr.ModTime().Format(gOpts.timefmt),
linkTarget)
}
func (ui *ui) drawPromptLine(nav *nav) {
st := tcell.StyleDefault
pwd := nav.currDir().path
if strings.HasPrefix(pwd, gUser.HomeDir) {
pwd = filepath.Join("~", strings.TrimPrefix(pwd, gUser.HomeDir))
}
sep := string(filepath.Separator)
var fname string
curr, err := nav.currFile()
if err == nil {
fname = filepath.Base(curr.path)
}
var prompt string
prompt = strings.Replace(gOpts.promptfmt, "%u", gUser.Username, -1)
prompt = strings.Replace(prompt, "%h", gHostname, -1)
prompt = strings.Replace(prompt, "%f", fname, -1)
if printLength(strings.Replace(strings.Replace(prompt, "%w", pwd, -1), "%d", pwd, -1)) > ui.promptWin.w {
names := strings.Split(pwd, sep)
for i := range names {
if names[i] == "" {
continue
}
r, _ := utf8.DecodeRuneInString(names[i])
names[i] = string(r)
if printLength(strings.Replace(strings.Replace(prompt, "%w", strings.Join(names, sep), -1), "%d", strings.Join(names, sep), -1)) <= ui.promptWin.w {
break
}
}
pwd = strings.Join(names, sep)
}
prompt = strings.Replace(prompt, "%w", pwd, -1)
if !strings.HasSuffix(pwd, sep) {
pwd += sep
}
prompt = strings.Replace(prompt, "%d", pwd, -1)
ui.promptWin.print(ui.screen, 0, 0, st, prompt)
}
func (ui *ui) drawStatLine(nav *nav) {
st := tcell.StyleDefault
dir := nav.currDir()
ui.msgWin.print(ui.screen, 0, 0, st, ui.msg)
tot := len(dir.files)
ind := min(dir.ind+1, tot)
acc := string(ui.keyCount) + string(ui.keyAcc)
var selection string
if len(nav.saves) > 0 {
copy := 0
move := 0
for _, cp := range nav.saves {
if cp {
copy++
} else {
move++
}
}
if copy > 0 {
selection += fmt.Sprintf(" \033[33;7m %d \033[0m", copy)
}
if move > 0 {
selection += fmt.Sprintf(" \033[31;7m %d \033[0m", move)
}
}
if len(nav.selections) > 0 {
selection += fmt.Sprintf(" \033[35;7m %d \033[0m", len(nav.selections))
}
var progress string
if nav.copyTotal > 0 {
percentage := int((100 * float64(nav.copyBytes)) / float64(nav.copyTotal))
progress += fmt.Sprintf(" [%d%%]", percentage)
}
if nav.moveTotal > 0 {
progress += fmt.Sprintf(" [%d/%d]", nav.moveCount, nav.moveTotal)
}
if nav.deleteTotal > 0 {
progress += fmt.Sprintf(" [%d/%d]", nav.deleteCount, nav.deleteTotal)
}
ruler := fmt.Sprintf("%s%s%s %d/%d", acc, progress, selection, ind, tot)
ui.msgWin.printRight(ui.screen, 0, st, ruler)
}
func (ui *ui) drawBox() {
st := tcell.StyleDefault
w, h := ui.screen.Size()
for i := 1; i < w-1; i++ {
ui.screen.SetContent(i, 1, '─', nil, st)
ui.screen.SetContent(i, h-2, '─', nil, st)
}
for i := 2; i < h-2; i++ {
ui.screen.SetContent(0, i, '│', nil, st)
ui.screen.SetContent(w-1, i, '│', nil, st)
}
ui.screen.SetContent(0, 1, '┌', nil, st)
ui.screen.SetContent(w-1, 1, '┐', nil, st)
ui.screen.SetContent(0, h-2, '└', nil, st)
ui.screen.SetContent(w-1, h-2, '┘', nil, st)
wacc := 0
for wind := 0; wind < len(ui.wins)-1; wind++ {
wacc += ui.wins[wind].w
ui.screen.SetContent(wacc, 1, '┬', nil, st)
for i := 2; i < h-2; i++ {
ui.screen.SetContent(wacc, i, '│', nil, st)
}
ui.screen.SetContent(wacc, h-2, '┴', nil, st)
}
}
func (ui *ui) draw(nav *nav) {
st := tcell.StyleDefault
wtot, htot := ui.screen.Size()
for i := 0; i < wtot; i++ {
for j := 0; j < htot; j++ {
ui.screen.SetContent(i, j, ' ', nil, st)
}
}
ui.drawPromptLine(nav)
length := min(len(ui.wins), len(nav.dirs))
woff := len(ui.wins) - length
if gOpts.preview {
length = min(len(ui.wins)-1, len(nav.dirs))
woff = len(ui.wins) - 1 - length
}
doff := len(nav.dirs) - length
for i := 0; i < length; i++ {
ui.wins[woff+i].printDir(ui.screen, nav.dirs[doff+i], nav.selections, nav.saves, ui.styles, ui.icons)
}
switch ui.cmdPrefix {
case "":
ui.drawStatLine(nav)
ui.screen.HideCursor()
case ">":
pos := min(runeSliceWidth(ui.cmdAccLeft), ui.msgWin.w-len(ui.cmdPrefix)-1)
left := ui.cmdAccLeft[runeSliceWidth(ui.cmdAccLeft)-pos:]
right := ui.cmdAccRight
ui.msgWin.printLine(ui.screen, 0, 0, st, ui.cmdPrefix)
ui.msgWin.print(ui.screen, len(ui.cmdPrefix), 0, st, ui.msg)
ui.msgWin.print(ui.screen, len(ui.cmdPrefix)+printLength(ui.msg), 0, st, string(left))
ui.msgWin.print(ui.screen, len(ui.cmdPrefix)+printLength(ui.msg)+runeSliceWidth(left), 0, st, string(right))
ui.screen.ShowCursor(ui.msgWin.x+len(ui.cmdPrefix)+printLength(ui.msg)+runeSliceWidth(left), ui.msgWin.y)
default:
pos := min(runeSliceWidth(ui.cmdAccLeft), ui.msgWin.w-len(ui.cmdPrefix)-1)
left := ui.cmdAccLeft[runeSliceWidth(ui.cmdAccLeft)-pos:]
right := ui.cmdAccRight
ui.msgWin.printLine(ui.screen, 0, 0, st, ui.cmdPrefix)
ui.msgWin.print(ui.screen, len(ui.cmdPrefix), 0, st, string(left))
ui.msgWin.print(ui.screen, len(ui.cmdPrefix)+runeSliceWidth(left), 0, st, string(right))
ui.screen.ShowCursor(ui.msgWin.x+len(ui.cmdPrefix)+runeSliceWidth(left), ui.msgWin.y)
}
if gOpts.preview {
curr, err := nav.currFile()
if err == nil {
preview := ui.wins[len(ui.wins)-1]
if curr.IsDir() {
preview.printDir(ui.screen, ui.dirPrev, nav.selections, nav.saves, ui.styles, ui.icons)
} else if curr.Mode().IsRegular() {
preview.printReg(ui.screen, ui.regPrev)
}
}
}
if gOpts.drawbox {
ui.drawBox()
}
if ui.menuBuf != nil {
lines := strings.Split(ui.menuBuf.String(), "\n")
lines = lines[:len(lines)-1]
ui.menuWin.h = len(lines) - 1
ui.menuWin.y = ui.wins[0].h - ui.menuWin.h
if gOpts.drawbox {
ui.menuWin.y += 2
}
ui.menuWin.printLine(ui.screen, 0, 0, st.Bold(true), lines[0])
for i, line := range lines[1:] {
ui.menuWin.printLine(ui.screen, 0, i+1, st, "")
ui.menuWin.print(ui.screen, 0, i+1, st, line)
}
}
ui.screen.Show()
}
func findBinds(keys map[string]expr, prefix string) (binds map[string]expr, ok bool) {
binds = make(map[string]expr)
for key, expr := range keys {
if !strings.HasPrefix(key, prefix) {
continue
}
binds[key] = expr
if key == prefix {
ok = true
}
}
return
}
func listBinds(binds map[string]expr) *bytes.Buffer {
t := new(tabwriter.Writer)
b := new(bytes.Buffer)
var keys []string
for k := range binds {
keys = append(keys, k)
}
sort.Strings(keys)
t.Init(b, 0, gOpts.tabstop, 2, '\t', 0)
fmt.Fprintln(t, "keys\tcommand")
for _, k := range keys {
fmt.Fprintf(t, "%s\t%v\n", k, binds[k])
}
t.Flush()
return b
}
func listMarks(marks map[string]string) *bytes.Buffer {
t := new(tabwriter.Writer)
b := new(bytes.Buffer)
var keys []string
for k := range marks {
keys = append(keys, k)
}
sort.Strings(keys)
t.Init(b, 0, gOpts.tabstop, 2, '\t', 0)
fmt.Fprintln(t, "mark\tpath")
for _, k := range keys {
fmt.Fprintf(t, "%s\t%s\n", k, marks[k])
}
t.Flush()
return b
}
func (ui *ui) pollEvent() tcell.Event {
select {
case val := <-ui.keyChan:
var ch rune
var mod tcell.ModMask
k := tcell.KeyRune
if utf8.RuneCountInString(val) == 1 {
ch, _ = utf8.DecodeRuneInString(val)
} else {
switch {
case val == "<lt>":
ch = '<'
case val == "<gt>":
ch = '>'
case val == "<space>":
ch = ' '
case reAltKey.MatchString(val):
match := reAltKey.FindStringSubmatch(val)[1]
ch, _ = utf8.DecodeRuneInString(match)
mod = tcell.ModMask(tcell.ModAlt)
default:
if key, ok := gValKey[val]; ok {
k = key
} else {
k = tcell.KeyESC
ui.echoerrf("unknown key: %s", val)
}
}
}
return tcell.NewEventKey(k, ch, mod)
case ev := <-ui.tevChan:
return ev
}
}
// This function is used to read a normal event on the client side. For keys,
// digits are interpreted as command counts but this is only done for digits
// preceding any non-digit characters (e.g. "42y2k" as 42 times "y2k").
func (ui *ui) readNormalEvent(ev tcell.Event) expr {
draw := &callExpr{"draw", nil, 1}
count := 1
switch tev := ev.(type) {
case *tcell.EventKey:
// KeyRune is a regular character
if tev.Key() == tcell.KeyRune {
switch {