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terminal.go
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terminal.go
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package fzf
import (
"bufio"
"context"
"encoding/json"
"fmt"
"io"
"math"
"net"
"os"
"os/signal"
"regexp"
"sort"
"strconv"
"strings"
"sync"
"syscall"
"time"
"github.com/rivo/uniseg"
"github.com/junegunn/fzf/src/tui"
"github.com/junegunn/fzf/src/util"
)
// import "github.com/pkg/profile"
/*
Placeholder regex is used to extract placeholders from fzf's template
strings. Acts as input validation for parsePlaceholder function.
Describes the syntax, but it is fairly lenient.
The following pseudo regex has been reverse engineered from the
implementation. It is overly strict, but better describes what's possible.
As such it is not useful for validation, but rather to generate test
cases for example.
\\?(?: # escaped type
{\+?s?f?RANGE(?:,RANGE)*} # token type
|{q} # query type
|{\+?n?f?} # item type (notice no mandatory element inside brackets)
)
RANGE = (?:
(?:-?[0-9]+)?\.\.(?:-?[0-9]+)? # ellipsis syntax for token range (x..y)
|-?[0-9]+ # shorthand syntax (x..x)
)
*/
var placeholder *regexp.Regexp
var whiteSuffix *regexp.Regexp
var offsetComponentRegex *regexp.Regexp
var offsetTrimCharsRegex *regexp.Regexp
var passThroughRegex *regexp.Regexp
const clearCode string = "\x1b[2J"
// Number of maximum focus events to process synchronously
const maxFocusEvents = 10000
func init() {
placeholder = regexp.MustCompile(`\\?(?:{[+sf]*[0-9,-.]*}|{q}|{fzf:(?:query|action|prompt)}|{\+?f?nf?})`)
whiteSuffix = regexp.MustCompile(`\s*$`)
offsetComponentRegex = regexp.MustCompile(`([+-][0-9]+)|(-?/[1-9][0-9]*)`)
offsetTrimCharsRegex = regexp.MustCompile(`[^0-9/+-]`)
// Parts of the preview output that should be passed through to the terminal
// * https://github.com/tmux/tmux/wiki/FAQ#what-is-the-passthrough-escape-sequence-and-how-do-i-use-it
// * https://sw.kovidgoyal.net/kitty/graphics-protocol
// * https://en.wikipedia.org/wiki/Sixel
// * https://iterm2.com/documentation-images.html
passThroughRegex = regexp.MustCompile(`\x1bPtmux;\x1b\x1b.*?[^\x1b]\x1b\\|\x1b(_G|P[0-9;]*q).*?\x1b\\\r?|\x1b]1337;.*?(\a|\x1b\\)`)
}
type jumpMode int
const (
jumpDisabled jumpMode = iota
jumpEnabled
jumpAcceptEnabled
)
type resumableState int
const (
disabledState resumableState = iota
pausedState
enabledState
)
func (s resumableState) Enabled() bool {
return s == enabledState
}
func (s *resumableState) Force(flag bool) {
if flag {
*s = enabledState
} else {
*s = disabledState
}
}
func (s *resumableState) Set(flag bool) {
if *s == disabledState {
return
}
if flag {
*s = enabledState
} else {
*s = pausedState
}
}
type commandSpec struct {
command string
tempFiles []string
}
type quitSignal struct {
code int
err error
}
type previewer struct {
version int64
lines []string
offset int
scrollable bool
final bool
following resumableState
spinner string
bar []bool
}
type previewed struct {
version int64
numLines int
offset int
filled bool
image bool
wipe bool
wireframe bool
}
type eachLine struct {
line string
err error
}
type itemLine struct {
offset int
current bool
selected bool
label string
queryLen int
width int
bar bool
result Result
}
type fitpad struct {
fit int
pad int
}
var emptyLine = itemLine{}
type labelPrinter func(tui.Window, int)
type StatusItem struct {
Index int `json:"index"`
Text string `json:"text"`
}
type Status struct {
Reading bool `json:"reading"`
Progress int `json:"progress"`
Query string `json:"query"`
Position int `json:"position"`
Sort bool `json:"sort"`
TotalCount int `json:"totalCount"`
MatchCount int `json:"matchCount"`
Current *StatusItem `json:"current"`
Matches []StatusItem `json:"matches"`
Selected []StatusItem `json:"selected"`
}
// Terminal represents terminal input/output
type Terminal struct {
initDelay time.Duration
infoStyle infoStyle
infoPrefix string
separator labelPrinter
separatorLen int
spinner []string
promptString string
prompt func()
promptLen int
borderLabel labelPrinter
borderLabelLen int
borderLabelOpts labelOpts
previewLabel labelPrinter
previewLabelLen int
previewLabelOpts labelOpts
pointer string
pointerLen int
pointerEmpty string
marker string
markerLen int
markerEmpty string
queryLen [2]int
layout layoutType
fullscreen bool
keepRight bool
hscroll bool
hscrollOff int
scrollOff int
wordRubout string
wordNext string
cx int
cy int
offset int
xoffset int
yanked []rune
input []rune
multi int
sort bool
toggleSort bool
track trackOption
delimiter Delimiter
expect map[tui.Event]string
keymap map[tui.Event][]*action
keymapOrg map[tui.Event][]*action
pressed string
printQuery bool
history *History
cycle bool
highlightLine bool
headerVisible bool
headerFirst bool
headerLines int
header []string
header0 []string
ellipsis string
scrollbar string
previewScrollbar string
ansi bool
tabstop int
margin [4]sizeSpec
padding [4]sizeSpec
unicode bool
listenAddr *listenAddress
listenPort *int
listener net.Listener
listenUnsafe bool
borderShape tui.BorderShape
cleanExit bool
executor *util.Executor
paused bool
border tui.Window
window tui.Window
pborder tui.Window
pwindow tui.Window
borderWidth int
count int
progress int
hasResultActions bool
hasFocusActions bool
hasLoadActions bool
hasResizeActions bool
triggerLoad bool
reading bool
running *util.AtomicBool
failed *string
jumping jumpMode
jumpLabels string
printer func(string)
printsep string
merger *Merger
selected map[int32]selectedItem
version int64
revision int
reqBox *util.EventBox
initialPreviewOpts previewOpts
previewOpts previewOpts
activePreviewOpts *previewOpts
previewer previewer
previewed previewed
previewBox *util.EventBox
eventBox *util.EventBox
mutex sync.Mutex
initFunc func() error
prevLines []itemLine
suppress bool
sigstop bool
startChan chan fitpad
killChan chan bool
serverInputChan chan []*action
serverOutputChan chan string
eventChan chan tui.Event
slab *util.Slab
theme *tui.ColorTheme
tui tui.Renderer
ttyin *os.File
executing *util.AtomicBool
termSize tui.TermSize
lastAction actionType
lastKey string
lastFocus int32
areaLines int
areaColumns int
forcePreview bool
clickHeaderLine int
clickHeaderColumn int
}
type selectedItem struct {
at time.Time
item *Item
}
type byTimeOrder []selectedItem
func (a byTimeOrder) Len() int {
return len(a)
}
func (a byTimeOrder) Swap(i, j int) {
a[i], a[j] = a[j], a[i]
}
func (a byTimeOrder) Less(i, j int) bool {
return a[i].at.Before(a[j].at)
}
const (
reqPrompt util.EventType = iota
reqInfo
reqHeader
reqList
reqJump
reqRefresh
reqReinit
reqFullRedraw
reqResize
reqRedrawBorderLabel
reqRedrawPreviewLabel
reqClose
reqPrintQuery
reqPreviewEnqueue
reqPreviewDisplay
reqPreviewRefresh
reqPreviewDelayed
reqQuit
reqFatal
)
type action struct {
t actionType
a string
}
//go:generate stringer -type=actionType
type actionType int
const (
actIgnore actionType = iota
actStart
actClick
actInvalid
actChar
actMouse
actBeginningOfLine
actAbort
actAccept
actAcceptNonEmpty
actAcceptOrPrintQuery
actBackwardChar
actBackwardDeleteChar
actBackwardDeleteCharEof
actBackwardWord
actCancel
actChangeBorderLabel
actChangeHeader
actChangeMulti
actChangePreviewLabel
actChangePrompt
actChangeQuery
actClearScreen
actClearQuery
actClearSelection
actClose
actDeleteChar
actDeleteCharEof
actEndOfLine
actFatal
actForwardChar
actForwardWord
actKillLine
actKillWord
actUnixLineDiscard
actUnixWordRubout
actYank
actBackwardKillWord
actSelectAll
actDeselectAll
actToggle
actToggleSearch
actToggleAll
actToggleDown
actToggleUp
actToggleIn
actToggleOut
actToggleTrack
actToggleTrackCurrent
actToggleHeader
actTrackCurrent
actUntrackCurrent
actDown
actUp
actPageUp
actPageDown
actPosition
actHalfPageUp
actHalfPageDown
actOffsetUp
actOffsetDown
actJump
actJumpAccept // XXX Deprecated in favor of jump:accept binding
actPrintQuery
actRefreshPreview
actReplaceQuery
actToggleSort
actShowPreview
actHidePreview
actTogglePreview
actTogglePreviewWrap
actTransform
actTransformBorderLabel
actTransformHeader
actTransformPreviewLabel
actTransformPrompt
actTransformQuery
actPreview
actChangePreview
actChangePreviewWindow
actPreviewTop
actPreviewBottom
actPreviewUp
actPreviewDown
actPreviewPageUp
actPreviewPageDown
actPreviewHalfPageUp
actPreviewHalfPageDown
actPrevHistory
actPrevSelected
actPut
actNextHistory
actNextSelected
actExecute
actExecuteSilent
actExecuteMulti // Deprecated
actSigStop
actFirst
actLast
actReload
actReloadSync
actDisableSearch
actEnableSearch
actSelect
actDeselect
actUnbind
actRebind
actBecome
actResponse
actShowHeader
actHideHeader
)
func (a actionType) Name() string {
return util.ToKebabCase(a.String()[3:])
}
func processExecution(action actionType) bool {
switch action {
case actTransform,
actTransformBorderLabel,
actTransformHeader,
actTransformPreviewLabel,
actTransformPrompt,
actTransformQuery,
actPreview,
actChangePreview,
actRefreshPreview,
actExecute,
actExecuteSilent,
actExecuteMulti,
actReload,
actReloadSync,
actBecome:
return true
}
return false
}
type placeholderFlags struct {
plus bool
preserveSpace bool
number bool
forceUpdate bool
file bool
}
type searchRequest struct {
sort bool
sync bool
command *commandSpec
environ []string
changed bool
}
type previewRequest struct {
template string
pwindow tui.Window
pwindowSize tui.TermSize
scrollOffset int
list []*Item
env []string
}
type previewResult struct {
version int64
lines []string
offset int
spinner string
}
func toActions(types ...actionType) []*action {
actions := make([]*action, len(types))
for idx, t := range types {
actions[idx] = &action{t: t, a: ""}
}
return actions
}
func defaultKeymap() map[tui.Event][]*action {
keymap := make(map[tui.Event][]*action)
add := func(e tui.EventType, a actionType) {
keymap[e.AsEvent()] = toActions(a)
}
addEvent := func(e tui.Event, a actionType) {
keymap[e] = toActions(a)
}
add(tui.Fatal, actFatal)
add(tui.Invalid, actInvalid)
add(tui.CtrlA, actBeginningOfLine)
add(tui.CtrlB, actBackwardChar)
add(tui.CtrlC, actAbort)
add(tui.CtrlG, actAbort)
add(tui.CtrlQ, actAbort)
add(tui.Esc, actAbort)
add(tui.CtrlD, actDeleteCharEof)
add(tui.CtrlE, actEndOfLine)
add(tui.CtrlF, actForwardChar)
add(tui.CtrlH, actBackwardDeleteChar)
add(tui.Backspace, actBackwardDeleteChar)
add(tui.Tab, actToggleDown)
add(tui.ShiftTab, actToggleUp)
add(tui.CtrlJ, actDown)
add(tui.CtrlK, actUp)
add(tui.CtrlL, actClearScreen)
add(tui.CtrlM, actAccept)
add(tui.CtrlN, actDown)
add(tui.CtrlP, actUp)
add(tui.CtrlU, actUnixLineDiscard)
add(tui.CtrlW, actUnixWordRubout)
add(tui.CtrlY, actYank)
if !util.IsWindows() {
add(tui.CtrlZ, actSigStop)
}
addEvent(tui.AltKey('b'), actBackwardWord)
add(tui.ShiftLeft, actBackwardWord)
addEvent(tui.AltKey('f'), actForwardWord)
add(tui.ShiftRight, actForwardWord)
addEvent(tui.AltKey('d'), actKillWord)
add(tui.AltBackspace, actBackwardKillWord)
add(tui.Up, actUp)
add(tui.Down, actDown)
add(tui.Left, actBackwardChar)
add(tui.Right, actForwardChar)
add(tui.Home, actBeginningOfLine)
add(tui.End, actEndOfLine)
add(tui.Delete, actDeleteChar)
add(tui.PageUp, actPageUp)
add(tui.PageDown, actPageDown)
add(tui.ShiftUp, actPreviewUp)
add(tui.ShiftDown, actPreviewDown)
add(tui.Mouse, actMouse)
add(tui.LeftClick, actClick)
add(tui.RightClick, actToggle)
add(tui.SLeftClick, actToggle)
add(tui.SRightClick, actToggle)
add(tui.ScrollUp, actUp)
add(tui.ScrollDown, actDown)
keymap[tui.SScrollUp.AsEvent()] = toActions(actToggle, actUp)
keymap[tui.SScrollDown.AsEvent()] = toActions(actToggle, actDown)
add(tui.PreviewScrollUp, actPreviewUp)
add(tui.PreviewScrollDown, actPreviewDown)
return keymap
}
func trimQuery(query string) []rune {
return []rune(strings.ReplaceAll(query, "\t", " "))
}
func mayTriggerPreview(opts *Options) bool {
if opts.ListenAddr != nil {
return true
}
for _, actions := range opts.Keymap {
for _, action := range actions {
switch action.t {
case actPreview, actChangePreview, actTransform:
return true
}
}
}
return false
}
func makeSpinner(unicode bool) []string {
if unicode {
return []string{`⠋`, `⠙`, `⠹`, `⠸`, `⠼`, `⠴`, `⠦`, `⠧`, `⠇`, `⠏`}
}
return []string{`-`, `\`, `|`, `/`, `-`, `\`, `|`, `/`}
}
func evaluateHeight(opts *Options, termHeight int) int {
size := opts.Height.size
if opts.Height.percent {
if opts.Height.inverse {
size = 100 - size
}
return util.Max(int(size*float64(termHeight)/100.0), opts.MinHeight)
}
if opts.Height.inverse {
size = float64(termHeight) - size
}
return int(size)
}
// NewTerminal returns new Terminal object
func NewTerminal(opts *Options, eventBox *util.EventBox, executor *util.Executor) (*Terminal, error) {
input := trimQuery(opts.Query)
var delay time.Duration
if opts.Tac {
delay = initialDelayTac
} else {
delay = initialDelay
}
var previewBox *util.EventBox
// We need to start the previewer even when --preview option is not specified
// * if HTTP server is enabled
// * if 'preview' or 'change-preview' action is bound to a key
// * if 'transform' action is bound to a key
if len(opts.Preview.command) > 0 || mayTriggerPreview(opts) {
previewBox = util.NewEventBox()
}
var renderer tui.Renderer
fullscreen := !opts.Height.auto && (opts.Height.size == 0 || opts.Height.percent && opts.Height.size == 100)
var err error
if fullscreen {
if tui.HasFullscreenRenderer() {
renderer = tui.NewFullscreenRenderer(opts.Theme, opts.Black, opts.Mouse)
} else {
renderer, err = tui.NewLightRenderer(opts.Theme, opts.Black, opts.Mouse, opts.Tabstop, opts.ClearOnExit,
true, func(h int) int { return h })
}
} else {
maxHeightFunc := func(termHeight int) int {
// Minimum height required to render fzf excluding margin and padding
effectiveMinHeight := minHeight
if previewBox != nil && opts.Preview.aboveOrBelow() {
effectiveMinHeight += 1 + borderLines(opts.Preview.border)
}
if noSeparatorLine(opts.InfoStyle, opts.Separator == nil || uniseg.StringWidth(*opts.Separator) > 0) {
effectiveMinHeight--
}
effectiveMinHeight += borderLines(opts.BorderShape)
return util.Min(termHeight, util.Max(evaluateHeight(opts, termHeight), effectiveMinHeight))
}
renderer, err = tui.NewLightRenderer(opts.Theme, opts.Black, opts.Mouse, opts.Tabstop, opts.ClearOnExit, false, maxHeightFunc)
}
if err != nil {
return nil, err
}
wordRubout := "[^\\pL\\pN][\\pL\\pN]"
wordNext := "[\\pL\\pN][^\\pL\\pN]|(.$)"
if opts.FileWord {
sep := regexp.QuoteMeta(string(os.PathSeparator))
wordRubout = fmt.Sprintf("%s[^%s]", sep, sep)
wordNext = fmt.Sprintf("[^%s]%s|(.$)", sep, sep)
}
keymapCopy := make(map[tui.Event][]*action)
for key, action := range opts.Keymap {
keymapCopy[key] = action
}
t := Terminal{
initDelay: delay,
infoStyle: opts.InfoStyle,
infoPrefix: opts.InfoPrefix,
separator: nil,
spinner: makeSpinner(opts.Unicode),
promptString: opts.Prompt,
queryLen: [2]int{0, 0},
layout: opts.Layout,
fullscreen: fullscreen,
keepRight: opts.KeepRight,
hscroll: opts.Hscroll,
hscrollOff: opts.HscrollOff,
scrollOff: opts.ScrollOff,
wordRubout: wordRubout,
wordNext: wordNext,
cx: len(input),
cy: 0,
offset: 0,
xoffset: 0,
yanked: []rune{},
input: input,
multi: opts.Multi,
sort: opts.Sort > 0,
toggleSort: opts.ToggleSort,
track: opts.Track,
delimiter: opts.Delimiter,
expect: opts.Expect,
keymap: opts.Keymap,
keymapOrg: keymapCopy,
pressed: "",
printQuery: opts.PrintQuery,
history: opts.History,
margin: opts.Margin,
padding: opts.Padding,
unicode: opts.Unicode,
listenAddr: opts.ListenAddr,
listenUnsafe: opts.Unsafe,
borderShape: opts.BorderShape,
borderWidth: 1,
borderLabel: nil,
borderLabelOpts: opts.BorderLabel,
previewLabel: nil,
previewLabelOpts: opts.PreviewLabel,
cleanExit: opts.ClearOnExit,
executor: executor,
paused: opts.Phony,
cycle: opts.Cycle,
highlightLine: opts.CursorLine,
headerVisible: true,
headerFirst: opts.HeaderFirst,
headerLines: opts.HeaderLines,
header: []string{},
header0: opts.Header,
ellipsis: opts.Ellipsis,
ansi: opts.Ansi,
tabstop: opts.Tabstop,
hasResultActions: false,
hasFocusActions: false,
hasLoadActions: false,
triggerLoad: false,
reading: true,
running: util.NewAtomicBool(true),
failed: nil,
jumping: jumpDisabled,
jumpLabels: opts.JumpLabels,
printer: opts.Printer,
printsep: opts.PrintSep,
merger: EmptyMerger(0),
selected: make(map[int32]selectedItem),
reqBox: util.NewEventBox(),
initialPreviewOpts: opts.Preview,
previewOpts: opts.Preview,
previewer: previewer{0, []string{}, 0, false, true, disabledState, "", []bool{}},
previewed: previewed{0, 0, 0, false, false, false, false},
previewBox: previewBox,
eventBox: eventBox,
mutex: sync.Mutex{},
suppress: true,
sigstop: false,
slab: util.MakeSlab(slab16Size, slab32Size),
theme: opts.Theme,
startChan: make(chan fitpad, 1),
killChan: make(chan bool),
serverInputChan: make(chan []*action, 100),
serverOutputChan: make(chan string),
eventChan: make(chan tui.Event, 6), // (load + result + zero|one) | (focus) | (resize) | (GetChar)
tui: renderer,
ttyin: tui.TtyIn(),
initFunc: func() error { return renderer.Init() },
executing: util.NewAtomicBool(false),
lastAction: actStart,
lastFocus: minItem.Index()}
t.prompt, t.promptLen = t.parsePrompt(opts.Prompt)
t.pointer, t.pointerLen = t.processTabs([]rune(opts.Pointer), 0)
t.marker, t.markerLen = t.processTabs([]rune(opts.Marker), 0)
// Pre-calculated empty pointer and marker signs
t.pointerEmpty = strings.Repeat(" ", t.pointerLen)
t.markerEmpty = strings.Repeat(" ", t.markerLen)
t.borderLabel, t.borderLabelLen = t.ansiLabelPrinter(opts.BorderLabel.label, &tui.ColBorderLabel, false)
t.previewLabel, t.previewLabelLen = t.ansiLabelPrinter(opts.PreviewLabel.label, &tui.ColPreviewLabel, false)
if opts.Separator == nil || len(*opts.Separator) > 0 {
bar := "─"
if opts.Separator != nil {
bar = *opts.Separator
} else if !t.unicode {
bar = "-"
}
t.separator, t.separatorLen = t.ansiLabelPrinter(bar, &tui.ColSeparator, true)
}
if t.unicode {
t.borderWidth = uniseg.StringWidth("│")
}
if opts.Scrollbar == nil {
if t.unicode && t.borderWidth == 1 {
t.scrollbar = "│"
} else {
t.scrollbar = "|"
}
t.previewScrollbar = t.scrollbar
} else {
runes := []rune(*opts.Scrollbar)
if len(runes) > 0 {
t.scrollbar = string(runes[0])
t.previewScrollbar = t.scrollbar
if len(runes) > 1 {
t.previewScrollbar = string(runes[1])
}
}
}
var resizeActions []*action
resizeActions, t.hasResizeActions = t.keymap[tui.Resize.AsEvent()]
if t.tui.ShouldEmitResizeEvent() {
t.keymap[tui.Resize.AsEvent()] = append(toActions(actClearScreen), resizeActions...)
}
_, t.hasResultActions = t.keymap[tui.Result.AsEvent()]
_, t.hasFocusActions = t.keymap[tui.Focus.AsEvent()]
_, t.hasLoadActions = t.keymap[tui.Load.AsEvent()]
if t.listenAddr != nil {
listener, port, err := startHttpServer(*t.listenAddr, t.serverInputChan, t.serverOutputChan)
if err != nil {
return nil, err
}
t.listener = listener
t.listenPort = &port
}
return &t, nil
}
func (t *Terminal) environ() []string {
env := os.Environ()
if t.listenPort != nil {
env = append(env, fmt.Sprintf("FZF_PORT=%d", *t.listenPort))
}
env = append(env, "FZF_QUERY="+string(t.input))
env = append(env, "FZF_ACTION="+t.lastAction.Name())
env = append(env, "FZF_KEY="+t.lastKey)
env = append(env, "FZF_PROMPT="+string(t.promptString))
env = append(env, "FZF_PREVIEW_LABEL="+t.previewLabelOpts.label)
env = append(env, "FZF_BORDER_LABEL="+t.borderLabelOpts.label)
env = append(env, fmt.Sprintf("FZF_TOTAL_COUNT=%d", t.count))
env = append(env, fmt.Sprintf("FZF_MATCH_COUNT=%d", t.merger.Length()))
env = append(env, fmt.Sprintf("FZF_SELECT_COUNT=%d", len(t.selected)))
env = append(env, fmt.Sprintf("FZF_LINES=%d", t.areaLines))
env = append(env, fmt.Sprintf("FZF_COLUMNS=%d", t.areaColumns))
env = append(env, fmt.Sprintf("FZF_POS=%d", util.Min(t.merger.Length(), t.cy+1)))
env = append(env, fmt.Sprintf("FZF_CLICK_HEADER_LINE=%d", t.clickHeaderLine))
env = append(env, fmt.Sprintf("FZF_CLICK_HEADER_COLUMN=%d", t.clickHeaderColumn))
return env
}
func borderLines(shape tui.BorderShape) int {
switch shape {
case tui.BorderHorizontal, tui.BorderRounded, tui.BorderSharp, tui.BorderBold, tui.BorderBlock, tui.BorderThinBlock, tui.BorderDouble:
return 2
case tui.BorderTop, tui.BorderBottom:
return 1
}
return 0
}
func (t *Terminal) visibleHeaderLines() int {
if !t.headerVisible {
return 0
}
return len(t.header0) + t.headerLines
}
// Extra number of lines needed to display fzf
func (t *Terminal) extraLines() int {
extra := t.visibleHeaderLines() + 1
if !t.noSeparatorLine() {
extra++
}
return extra
}
func (t *Terminal) MaxFitAndPad() (int, int) {
_, screenHeight, marginInt, paddingInt := t.adjustMarginAndPadding()
padHeight := marginInt[0] + marginInt[2] + paddingInt[0] + paddingInt[2]
fit := screenHeight - padHeight - t.extraLines()
return fit, padHeight
}
func (t *Terminal) ansiLabelPrinter(str string, color *tui.ColorPair, fill bool) (labelPrinter, int) {
// Nothing to do
if len(str) == 0 {
return nil, 0
}
// Extract ANSI color codes
str = firstLine(str)
text, colors, _ := extractColor(str, nil, nil)
runes := []rune(text)
// Simpler printer for strings without ANSI colors or tab characters
if colors == nil && !strings.ContainsRune(str, '\t') {
length := util.StringWidth(str)
if length == 0 {
return nil, 0
}
printFn := func(window tui.Window, limit int) {
if length > limit {
trimmedRunes, _ := t.trimRight(runes, limit)
window.CPrint(*color, string(trimmedRunes))
} else if fill {
window.CPrint(*color, util.RepeatToFill(str, length, limit))
} else {
window.CPrint(*color, str)
}
}
return printFn, length
}
// Printer that correctly handles ANSI color codes and tab characters
item := &Item{text: util.RunesToChars(runes), colors: colors}
length := t.displayWidth(runes)
if length == 0 {
return nil, 0
}
result := Result{item: item}
var offsets []colorOffset
printFn := func(window tui.Window, limit int) {
if offsets == nil {
// tui.Col* are not initialized until renderer.Init()
offsets = result.colorOffsets(nil, t.theme, *color, *color, false)
}
for limit > 0 {
if length > limit {
trimmedRunes, _ := t.trimRight(runes, limit)
t.printColoredString(window, trimmedRunes, offsets, *color)
break
} else if fill {
t.printColoredString(window, runes, offsets, *color)
limit -= length
} else {
t.printColoredString(window, runes, offsets, *color)
break
}
}
}
return printFn, length
}
func (t *Terminal) parsePrompt(prompt string) (func(), int) {
var state *ansiState
prompt = firstLine(prompt)
trimmed, colors, _ := extractColor(prompt, state, nil)
item := &Item{text: util.ToChars([]byte(trimmed)), colors: colors}
// "Prompt> "
// ------- // Do not apply ANSI attributes to the trailing whitespaces
// // unless the part has a non-default ANSI state
loc := whiteSuffix.FindStringIndex(trimmed)
if loc != nil {
blankState := ansiOffset{[2]int32{int32(loc[0]), int32(loc[1])}, ansiState{-1, -1, tui.AttrClear, -1}}
if item.colors != nil {
lastColor := (*item.colors)[len(*item.colors)-1]
if lastColor.offset[1] < int32(loc[1]) {
blankState.offset[0] = lastColor.offset[1]
colors := append(*item.colors, blankState)