package tui
import (
"fmt"
"os"
"regexp"
"strconv"
"strings"
"time"
"unicode/utf8"
"github.com/junegunn/fzf/src/util"
"golang.org/x/crypto/ssh/terminal"
)
const (
defaultWidth = 80
defaultHeight = 24
defaultEscDelay = 100
escPollInterval = 5
offsetPollTries = 10
maxInputBuffer = 10 * 1024
)
const consoleDevice string = "/dev/tty"
var offsetRegexp *regexp.Regexp = regexp.MustCompile("(.*)\x1b\\[([0-9]+);([0-9]+)R")
var offsetRegexpBegin *regexp.Regexp = regexp.MustCompile("^\x1b\\[[0-9]+;[0-9]+R")
func (r *LightRenderer) stderr(str string) {
r.stderrInternal(str, true)
}
// FIXME: Need better handling of non-displayable characters
func (r *LightRenderer) stderrInternal(str string, allowNLCR bool) {
bytes := []byte(str)
runes := []rune{}
for len(bytes) > 0 {
r, sz := utf8.DecodeRune(bytes)
nlcr := r == '\n' || r == '\r'
if r >= 32 || r == '\x1b' || nlcr {
if r == utf8.RuneError || nlcr && !allowNLCR {
runes = append(runes, ' ')
} else {
runes = append(runes, r)
}
}
bytes = bytes[sz:]
}
r.queued += string(runes)
}
func (r *LightRenderer) csi(code string) {
r.stderr("\x1b[" + code)
}
func (r *LightRenderer) flush() {
if len(r.queued) > 0 {
fmt.Fprint(os.Stderr, r.queued)
r.queued = ""
}
}
// Light renderer
type LightRenderer struct {
theme *ColorTheme
mouse bool
forceBlack bool
clearOnExit bool
prevDownTime time.Time
clickY []int
ttyin *os.File
buffer []byte
origState *terminal.State
width int
height int
yoffset int
tabstop int
escDelay int
fullscreen bool
upOneLine bool
queued string
y int
x int
maxHeightFunc func(int) int
// Windows only
ttyinChannel chan byte
inHandle uintptr
outHandle uintptr
origStateInput uint32
origStateOutput uint32
}
type LightWindow struct {
renderer *LightRenderer
colored bool
preview bool
border BorderStyle
top int
left int
width int
height int
posx int
posy int
tabstop int
fg Color
bg Color
}
func NewLightRenderer(theme *ColorTheme, forceBlack bool, mouse bool, tabstop int, clearOnExit bool, fullscreen bool, maxHeightFunc func(int) int) Renderer {
r := LightRenderer{
theme: theme,
forceBlack: forceBlack,
mouse: mouse,
clearOnExit: clearOnExit,
ttyin: openTtyIn(),
yoffset: 0,
tabstop: tabstop,
fullscreen: fullscreen,
upOneLine: false,
maxHeightFunc: maxHeightFunc}
return &r
}
func repeat(r rune, times int) string {
if times > 0 {
return strings.Repeat(string(r), times)
}
return ""
}
func atoi(s string, defaultValue int) int {
value, err := strconv.Atoi(s)
if err != nil {
return defaultValue
}
return value
}
func (r *LightRenderer) Init() {
r.escDelay = atoi(os.Getenv("ESCDELAY"), defaultEscDelay)
if