package fzf import ( "bufio" "fmt" "io/ioutil" "math" "os" "os/signal" "regexp" "sort" "strconv" "strings" "sync" "syscall" "time" "github.com/mattn/go-runewidth" "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 whats 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 activeTempFiles []string const clearCode string = "\x1b[2J" func init() { placeholder = regexp.MustCompile(`\\?(?:{[+sf]*[0-9,-.]*}|{q}|{\+?f?nf?})`) whiteSuffix = regexp.MustCompile(`\s*$`) offsetComponentRegex = regexp.MustCompile(`([+-][0-9]+)|(-?/[1-9][0-9]*)`) offsetTrimCharsRegex = regexp.MustCompile(`[^0-9/+-]`) activeTempFiles = []string{} } type jumpMode int const ( jumpDisabled jumpMode = iota jumpEnabled jumpAcceptEnabled ) type previewer struct { version int64 lines []string offset int enabled bool scrollable bool final bool following bool spinner string } type previewed struct { version int64 numLines int offset int filled bool } type eachLine struct { line string err error } type itemLine struct { current bool selected bool label string queryLen int width int result Result } var emptyLine = itemLine{} // Terminal represents terminal input/output type Terminal struct { initDelay time.Duration infoStyle infoStyle spinner []string prompt func() promptLen int 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 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 headerFirst bool headerLines int header []string header0 []string ellipsis string ansi bool tabstop int margin [4]sizeSpec padding [4]sizeSpec strong tui.Attr unicode bool borderShape tui.BorderShape cleanExit bool paused bool border tui.Window window tui.Window pborder tui.Window pwindow tui.Window count int progress int reading bool running bool failed *string jumping jumpMode jumpLabels string printer func(string) printsep string merger *Merger selected map[int32]selectedItem version int64 reqBox *util.EventBox initialPreviewOpts previewOpts previewOpts previewOpts previewer previewer previewed previewed previewBox *util.EventBox eventBox *util.EventBox mutex sync.Mutex initFunc func() prevLines []itemLine suppress bool sigstop bool startChan chan bool killChan chan int slab *util.Slab theme *tui.ColorTheme tui tui.Renderer executing *util.AtomicBool } 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 reqRedraw reqFullRedraw reqClose reqPrintQuery reqPreviewEnqueue reqPreviewDisplay reqPreviewRefresh reqPreviewDelayed reqQuit ) type action struct { t actionType a string } type actionType int const ( actIgnore actionType = iota actInvalid actRune actMouse actBeginningOfLine actAbort actAccept actAcceptNonEmpty actBackwardChar actBackwardDeleteChar actBackwardDeleteCharEOF actBackwardWord actCancel actChangePrompt actClearScreen actClearQuery actClearSelection actClose actDeleteChar actDeleteCharEOF actEndOfLine actForwardChar actForwardWord actKillLine actKillWord actUnixLineDiscard actUnixWordRubout actYank actBackwardKillWord actSelectAll actDeselectAll actToggle actToggleSearch actToggleAll actToggleDown actToggleUp actToggleIn actToggleOut actDown actUp actPageUp actPageDown actHalfPageUp actHalfPageDown actJump actJumpAccept actPrintQuery actRefreshPreview actReplaceQuery actToggleSort actTogglePreview actTogglePreviewWrap actPreview actChangePreview actChangePreviewWindow actPreviewTop actPreviewBottom actPreviewUp actPreviewDown actPreviewPageUp actPreviewPageDown actPreviewHalfPageUp actPreviewHalfPageDown actPreviousHistory actNextHistory actExecute actExecuteSilent actExecuteMulti // Deprecated actSigStop actFirst actLast actReload actDisableSearch actEnableSearch actSelect actDeselect actUnbind actRebind ) type placeholderFlags struct { plus bool preserveSpace bool number bool query bool file bool } type searchRequest struct { sort bool command *string } type previewRequest struct { template string pwindow tui.Window scrollOffset int list []*Item } 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.Invalid, actInvalid) add(tui.Resize, actClearScreen) 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.BSpace, actBackwardDeleteChar) add(tui.Tab, actToggleDown) add(tui.BTab, 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.SLeft, actBackwardWord) addEvent(tui.AltKey('f'), actForwardWord) add(tui.SRight, actForwardWord) addEvent(tui.AltKey('d'), actKillWord) add(tui.AltBS, 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.Del, actDeleteChar) add(tui.PgUp, actPageUp) add(tui.PgDn, actPageDown) add(tui.SUp, actPreviewUp) add(tui.SDown, actPreviewDown) add(tui.Mouse, actMouse) add(tui.DoubleClick, actAccept) add(tui.LeftClick, actIgnore) add(tui.RightClick, actToggle) return keymap } func trimQuery(query string) []rune { return []rune(strings.Replace(query, "\t", " ", -1)) } func hasPreviewAction(opts *Options) bool { for _, actions := range opts.Keymap { for _, action := range actions { if action.t == actPreview || action.t == actChangePreview { return true } } } return false } func makeSpinner(unicode bool) []string { if unicode { return []string{`⠋`, `⠙`, `⠹`, `⠸`, `⠼`, `⠴`, `⠦`, `⠧`, `⠇`, `⠏`} } return []string{`-`, `\`, `|`, `/`, `-`, `\`, `|`, `/`} } // NewTerminal returns new Terminal object func NewTerminal(opts *Options, eventBox *util.EventBox) *Terminal { input := trimQuery(opts.Query) var header []string switch opts.Layout { case layoutDefault, layoutReverseList: header = reverseStringArray(opts.Header) default: header = opts.Header } var delay time.Duration if opts.Tac { delay = initialDelayTac } else { delay = initialDelay } var previewBox *util.EventBox showPreviewWindow := len(opts.Preview.command) > 0 && !opts.Preview.hidden if len(opts.Preview.command) > 0 || hasPreviewAction(opts) { previewBox = util.NewEventBox() } strongAttr := tui.Bold if !opts.Bold { strongAttr = tui.AttrRegular } var renderer tui.Renderer fullscreen := opts.Height.size == 0 || opts.Height.percent && opts.Height.size == 100 if fullscreen { if tui.HasFullscreenRenderer() { renderer = tui.NewFullscreenRenderer(opts.Theme, opts.Black, opts.Mouse) } else { renderer = 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 { var maxHeight int if opts.Height.percent { maxHeight = util.Max(int(opts.Height.size*float64(termHeight)/100.0), opts.MinHeight) } else { maxHeight = int(opts.Height.size) } effectiveMinHeight := minHeight if previewBox != nil && (opts.Preview.position == posUp || opts.Preview.position == posDown) { effectiveMinHeight *= 2 } if opts.InfoStyle != infoDefault { effectiveMinHeight-- } if opts.BorderShape != tui.BorderNone { effectiveMinHeight += 2 } return util.Min(termHeight, util.Max(maxHeight, effectiveMinHeight)) } renderer = tui.NewLightRenderer(opts.Theme, opts.Black, opts.Mouse, opts.Tabstop, opts.ClearOnExit, false, maxHeightFunc) } 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, spinner: makeSpinner(opts.Unicode), 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, 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, borderShape: opts.BorderShape, cleanExit: opts.ClearOnExit, paused: opts.Phony, strong: strongAttr, cycle: opts.Cycle, headerFirst: opts.HeaderFirst, headerLines: opts.HeaderLines, header: header, header0: header, ellipsis: opts.Ellipsis, ansi: opts.Ansi, tabstop: opts.Tabstop, reading: true, running: true, failed: nil, jumping: jumpDisabled, jumpLabels: opts.JumpLabels, printer: opts.Printer, printsep: opts.PrintSep, merger: EmptyMerger, selected: make(map[int32]selectedItem), reqBox: util.NewEventBox(), initialPreviewOpts: opts.Preview, previewOpts: opts.Preview, previewer: previewer{0, []string{}, 0, showPreviewWindow, false, true, false, ""}, previewed: previewed{0, 0, 0, false}, previewBox: previewBox, eventBox: eventBox, mutex: sync.Mutex{}, suppress: true, sigstop: false, slab: util.MakeSlab(slab16Size, slab32Size), theme: opts.Theme, startChan: make(chan bool, 1), killChan: make(chan int), tui: renderer, initFunc: func() { renderer.Init() }, executing: util.NewAtomicBool(false)} 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) return &t } func (t *Terminal) parsePrompt(prompt string) (func(), int) { var state *ansiState 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) item.colors = &colors } } else { colors := []ansiOffset{blankState} item.colors = &colors } } output := func() { t.printHighlighted( Result{item: item}, tui.ColPrompt, tui.ColPrompt, false, false) } _, promptLen := t.processTabs([]rune(trimmed), 0) return output, promptLen } func (t *Terminal) noInfoLine() bool { return t.infoStyle != infoDefault } // Input returns current query string func (t *Terminal) Input() (bool, []rune) { t.mutex.Lock() defer t.mutex.Unlock() return t.paused, copySlice(t.input) } // UpdateCount updates the count information func (t *Terminal) UpdateCount(cnt int, final bool, failedCommand *string) { t.mutex.Lock() t.count = cnt t.reading = !final t.failed = failedCommand t.mutex.Unlock() t.reqBox.Set(reqInfo, nil) if final { t.reqBox.Set(reqRefresh, nil) } } func reverseStringArray(input []string) []string { size := len(input) reversed := make([]string, size) for idx, str := range input { reversed[size-idx-1] = str } return reversed } // UpdateHeader updates the header func (t *Terminal) UpdateHeader(header []string) { t.mutex.Lock() t.header = append(append([]string{}, t.header0...), header...) t.mutex.Unlock() t.reqBox.Set(reqHeader, nil) } // UpdateProgress updates the search progress func (t *Terminal) UpdateProgress(progress float32) { t.mutex.Lock() newProgress := int(progress * 100) changed := t.progress != newProgress t.progress = newProgress t.mutex.Unlock() if changed { t.reqBox.Set(reqInfo, nil) } } // UpdateList updates Merger to display the list func (t *Terminal) UpdateList(merger *Merger, reset bool) { t.mutex.Lock() t.progress = 100 t.merger = merger if reset { t.selected = make(map[int32]selectedItem) t.version++ } t.mutex.Unlock() t.reqBox.Set(reqInfo, nil) t.reqBox.Set(reqList, nil) } func (t *Terminal) output() bool { if t.printQuery { t.printer(string(t.input)) } if len(t.expect) > 0 { t.printer(t.pressed) } found := len(t.selected) > 0 if !found { current := t.currentItem() if current != nil { t.printer(current.AsString(t.ansi)) found = true } } else { for _, sel := range t.sortSelected() { t.printer(sel.item.AsString(t.ansi)) } } return found } func (t *Terminal) sortSelected() []selectedItem { sels := make([]selectedItem, 0, len(t.selected)) for _, sel := range t.selected { sels = append(sels, sel) } sort.Sort(byTimeOrder(sels)) return sels } func (t *Terminal) displayWidth(runes []rune) int { width, _ := util.RunesWidth(runes, 0, t.tabstop, math.MaxInt32) return width } const ( minWidth = 4 minHeight = 4 ) func calculateSize(base int, size sizeSpec, occupied int, minSize int, pad int) int { max := base - occupied if size.percent { return util.Constrain(int(float64(base)*0.01*size.size), minSize, max) } return util.Constrain(int(size.size)+pad, minSize, max) } func (t *Terminal) resizeWindows() { screenWidth := t.tui.MaxX() screenHeight := t.tui.MaxY() t.prevLines = make([]itemLine, screenHeight) marginInt := [4]int{} // TRBL paddingInt := [4]int{} // TRBL sizeSpecToInt := func(index int, spec sizeSpec) int { if spec.percent { var max float64 if index%2 == 0 { max = float64(screenHeight) } else { max = float64(screenWidth) } return int(max * spec.size * 0.01) } return int(spec.size) } for idx, sizeSpec := range t.padding { paddingInt[idx] = sizeSpecToInt(idx, sizeSpec) } extraMargin := [4]int{} // TRBL for idx, sizeSpec := range t.margin { switch t.borderShape { case tui.BorderHorizontal: extraMargin[idx] += 1 - idx%2 case tui.BorderVertical: extraMargin[idx] += 2 * (idx % 2) case tui.BorderTop: if idx == 0 { extraMargin[idx]++ } case tui.BorderRight: if idx == 1 { extraMargin[idx] += 2 } case tui.BorderBottom: if idx == 2 { extraMargin[idx]++ } case tui.BorderLeft: if idx == 3 { extraMargin[idx] += 2 } case tui.BorderRounded, tui.BorderSharp: extraMargin[idx] += 1 + idx%2 } marginInt[idx] = sizeSpecToInt(idx, sizeSpec) + extraMargin[idx] } adjust := func(idx1 int, idx2 int, max int, min int) { if max >= min { margin := marginInt[idx1] + marginInt[idx2] + paddingInt[idx1] + paddingInt[idx2] if max-margin < min { desired := max - min paddingInt[idx1] = desired * paddingInt[idx1] / margin paddingInt[idx2] = desired * paddingInt[idx2] / margin marginInt[idx1] = util.Max(extraMargin[idx1], desired*marginInt[idx1]/margin) marginInt[idx2] = util.Max(extraMargin[idx2], desired*marginInt[idx2]/margin) } } } previewVisible := t.isPreviewEnabled() && t.previewOpts.size.size > 0 minAreaWidth := minWidth minAreaHeight := minHeight if previewVisible { switch t.previewOpts.position { case posUp, posDown: minAreaHeight *= 2 case posLeft, posRight: minAreaWidth *= 2 } } adjust(1, 3, screenWidth, minAreaWidth) adjust(0, 2, screenHeight, minAreaHeight) if t.border != nil { t.border.Close() } if t.window != nil { t.window.Close() } if t.pborder != nil { t.pborder.Close() } if t.pwindow != nil { t.pwindow.Close() } // Reset preview version so that full redraw occurs t.previewed.version = 0 width := screenWidth - marginInt[1] - marginInt[3] height := screenHeight - marginInt[0] - marginInt[2] switch t.borderShape { case tui.BorderHorizontal: t.border = t.tui.NewWindow( marginInt[0]-1, marginInt[3], width, height+2, false, tui.MakeBorderStyle(tui.BorderHorizontal, t.unicode)) case tui.BorderVertical: t.border = t.tui.NewWindow( marginInt[0], marginInt[3]-2, width+4, height, false, tui.MakeBorderStyle(tui.BorderVertical, t.unicode)) case tui.BorderTop: t.border = t.tui.NewWindow( marginInt[0]-1, marginInt[3], width, height+1, false, tui.MakeBorderStyle(tui.BorderTop, t.unicode)) case tui.BorderBottom: t.border = t.tui.NewWindow( marginInt[0], marginInt[3], width, height+1, false, tui.MakeBorderStyle(tui.BorderBottom, t.unicode)) case tui.BorderLeft: t.border = t.tui.NewWindow( marginInt[0], marginInt[3]-2, width+2, height, false, tui.MakeBorderStyle(tui.BorderLeft, t.unicode)) case tui.BorderRight: t.border = t.tui.NewWindow( marginInt[0], marginInt[3], width+2, height, false, tui.MakeBorderStyle(tui.BorderRight, t.unicode)) case tui.BorderRounded, tui.BorderSharp: t.border = t.tui.NewWindow( marginInt[0]-1, marginInt[3]-2, width+4, height+2, false, tui.MakeBorderStyle(t.borderShape, t.unicode)) } // Add padding for idx, val := range paddingInt { marginInt[idx] += val } width = screenWidth - marginInt[1] - marginInt[3] height = screenHeight - marginInt[0] - marginInt[2] noBorder := tui.MakeBorderStyle(tui.BorderNone, t.unicode) if previewVisible { createPreviewWindow := func(y int, x int, w int, h int) { pwidth := w pheight := h var previewBorder tui.BorderStyle if t.previewOpts.border == tui.BorderNone { previewBorder = tui.MakeTransparentBorder() } else { previewBorder = tui.MakeBorderStyle(t.previewOpts.border, t.unicode) } t.pborder = t.tui.NewWindow(y, x, w, h, true, previewBorder) switch t.previewOpts.border { case tui.BorderSharp, tui.BorderRounded: pwidth -= 4 pheight -= 2 x += 2 y += 1 case tui.BorderLeft: pwidth -= 2 x += 2 case tui.BorderRight: pwidth -= 2 case tui.BorderTop: pheight -= 1 y += 1 case tui.BorderBottom: pheight -= 1 case tui.BorderHorizontal: pheight -= 2 y += 1 case tui.BorderVertical: pwidth -= 4 x += 2 } t.pwindow = t.tui.NewWindow(y, x, pwidth, pheight, true, noBorder) } verticalPad := 2 minPreviewHeight := 3 switch t.previewOpts.border { case tui.BorderNone, tui.BorderVertical, tui.BorderLeft, tui.BorderRight: verticalPad = 0 minPreviewHeight = 1 case tui.BorderTop, tui.BorderBottom: verticalPad = 1 minPreviewHeight = 2 } switch t.previewOpts.position { case posUp: pheight := calculateSize(height, t.previewOpts.size, minHeight, minPreviewHeight, verticalPad) t.window = t.tui.NewWindow( marginInt[0]+pheight, marginInt[3], width, height-pheight, false, noBorder) createPreviewWindow(marginInt[0], marginInt[3], width, pheight) case posDown: pheight := calculateSize(height, t.previewOpts.size, minHeight, minPreviewHeight, verticalPad) t.window = t.tui.NewWindow( marginInt[0], marginInt[3], width, height-pheight, false, noBorder) createPreviewWindow(marginInt[0]+height-pheight, marginInt[3], width, pheight) case posLeft: pwidth := calculateSize(width, t.previewOpts.size, minWidth, 5, 4) t.window = t.tui.NewWindow( marginInt[0], marginInt[3]+pwidth, width-pwidth, height, false, noBorder) createPreviewWindow(marginInt[0], marginInt[3], pwidth, height) case posRight: pwidth := calculateSize(width, t.previewOpts.size, minWidth, 5, 4) t.window = t.tui.NewWindow( marginInt[0], marginInt[3], width-pwidth, height, false, noBorder) createPreviewWindow(marginInt[0], marginInt[3]+width-pwidth, pwidth, height) } } else { t.window = t.tui.NewWindow( marginInt[0], marginInt[3], width, height, false, noBorder) } for i := 0; i < t.window.Height(); i++ { t.window.MoveAndClear(i, 0) } } func (t *Terminal) move(y int, x int, clear bool) { h := t.window.Height() switch t.layout { case layoutDefault: y = h - y - 1 case layoutReverseList: n := 2 + len(t.header) if t.noInfoLine() { n-- } if y < n { y = h - y - 1 } else { y -= n } } if clear { t.window.MoveAndClear(y, x) } else { t.window.Move(y, x) } } func (t *Terminal) truncateQuery() { t.input, _ = t.trimRight(t.input, maxPatternLength) t.cx = util.Constrain(t.cx, 0, len(t.input)) } func (t *Terminal) updatePromptOffset() ([]rune, []rune) { maxWidth := util.Max(1, t.window.Width()-t.promptLen-1) _, overflow := t.trimLeft(t.input[:t.cx], maxWidth) minOffset := int(overflow) maxOffset := util.Min(util.Min(len(t.input), minOffset+maxWidth), t.cx) t.xoffset = util.Constrain(t.xoffset, minOffset, maxOffset) before, _ := t.trimLeft(t.input[t.xoffset:t.cx], maxWidth) beforeLen := t.displayWidth(before) after, _ := t.trimRight(t.input[t.cx:], maxWidth-beforeLen) afterLen := t.displayWidth(after) t.queryLen = [2]int{beforeLen, afterLen} return before, after } func (t *Terminal) promptLine() int { if t.headerFirst { max := t.window.Height() - 1 if !t.noInfoLine() { max-- } return util.Min(len(t.header0)+t.headerLines, max) } return 0 } func (t *Terminal) placeCursor() { t.move(t.promptLine(), t.promptLen+t.queryLen[0], false) } func (t *Terminal) printPrompt() { t.move(t.promptLine(), 0, true) t.prompt() before, after := t.updatePromptOffset() color := tui.ColInput if t.paused { color = tui.ColDisabled } t.window.CPrint(color, string(before)) t.window.CPrint(color, string(after)) } func (t *Terminal) trimMessage(message string, maxWidth int) string { if len(message) <= maxWidth { return message } runes, _ := t.trimRight([]rune(message), maxWidth-2) return string(runes) + strings.Repeat(".", util.Constrain(maxWidth, 0, 2)) } func (t *Terminal) printInfo() { pos := 0 line := t.promptLine() switch t.infoStyle { case infoDefault: t.move(line+1, 0, true) if t.reading { duration := int64(spinnerDuration) idx := (time.Now().UnixNano() % (duration * int64(len(t.spinner)))) / duration t.window.CPrint(tui.ColSpinner, t.spinner[idx]) } t.move(line+1, 2, false) pos = 2 case infoInline: pos = t.promptLen + t.queryLen[0] + t.queryLen[1] + 1 if pos+len(" < ") > t.window.Width() { return } t.move(line, pos, true) if t.reading { t.window.CPrint(tui.ColSpinner, " < ") } else { t.window.CPrint(tui.ColPrompt, " < ") } pos += len(" < ") case infoHidden: return } found := t.merger.Length() total := util.Max(found, t.count) output := fmt.Sprintf("%d/%d", found, total) if t.toggleSort { if t.sort { output += " +S" } else { output += " -S" } } if t.multi > 0 { if t.multi == maxMulti { output += fmt.Sprintf(" (%d)", len(t.selected)) } else { output += fmt.Sprintf(" (%d/%d)", len(t.selected), t.multi) } } if t.progress > 0 && t.progress < 100 { output += fmt.Sprintf(" (%d%%)", t.progress) } if t.failed != nil && t.count == 0 { output = fmt.Sprintf("[Command failed: %s]", *t.failed) } output = t.trimMessage(output, t.window.Width()-pos) t.window.CPrint(tui.ColInfo, output) } func (t *Terminal) printHeader() { if len(t.header) == 0 { return } max := t.window.Height() if t.headerFirst { max-- if !t.noInfoLine() { max-- } } var state *ansiState for idx, lineStr := range t.header { line := idx if !t.headerFirst { line++ if !t.noInfoLine() { line++ } } if line >= max { continue } trimmed, colors, newState := extractColor(lineStr, state, nil) state = newState item := &Item{ text: util.ToChars([]byte(trimmed)), colors: colors} t.move(line, 2, true) t.printHighlighted(Result{item: item}, tui.ColHeader, tui.ColHeader, false, false) } } func (t *Terminal) printList() { t.constrain() maxy := t.maxItems() count := t.merger.Length() - t.offset for j := 0; j < maxy; j++ { i := j if t.layout == layoutDefault { i = maxy - 1 - j } line := i + 2 + len(t.header) if t.noInfoLine() { line-- } if i < count { t.printItem(t.merger.Get(i+t.offset), line, i, i == t.cy-t.offset) } else if t.prevLines[i] != emptyLine { t.prevLines[i] = emptyLine t.move(line, 0, true) } } } func (t *Terminal) printItem(result Result, line int, i int, current bool) { item := result.item _, selected := t.selected[item.Index()] label := "" if t.jumping != jumpDisabled { if i < len(t.jumpLabels) { // Striped current = i%2 == 0 label = t.jumpLabels[i:i+1] + strings.Repeat(" ", t.pointerLen-1) } } else if current { label = t.pointer } // Avoid unnecessary redraw newLine := itemLine{current: current, selected: selected, label: label, result: result, queryLen: len(t.input), width: 0} prevLine := t.prevLines[i] if prevLine.current == newLine.current && prevLine.selected == newLine.selected && prevLine.label == newLine.label && prevLine.queryLen == newLine.queryLen && prevLine.result == newLine.result { return } t.move(line, 0, false) if current { if len(label) == 0 { t.window.CPrint(tui.ColCurrentCursorEmpty, t.pointerEmpty) } else { t.window.CPrint(tui.ColCurrentCursor, label) } if selected { t.window.CPrint(tui.ColCurrentSelected, t.marker) } else { t.window.CPrint(tui.ColCurrentSelectedEmpty, t.markerEmpty) } newLine.width = t.printHighlighted(result, tui.ColCurrent, tui.ColCurrentMatch, true, true) } else { if len(label) == 0 { t.window.CPrint(tui.ColCursorEmpty, t.pointerEmpty) } else { t.window.CPrint(tui.ColCursor, label) } if selected { t.window.CPrint(tui.ColSelected, t.marker) } else { t.window.Print(t.markerEmpty) } newLine.width = t.printHighlighted(result, tui.ColNormal, tui.ColMatch, false, true) } fillSpaces := prevLine.width - newLine.width if fillSpaces > 0 { t.window.Print(strings.Repeat(" ", fillSpaces)) } t.prevLines[i] = newLine } func (t *Terminal) trimRight(runes []rune, width int) ([]rune, bool) { // We start from the beginning to handle tab characters _, overflowIdx := util.RunesWidth(runes, 0, t.tabstop, width) if overflowIdx >= 0 { return runes[:overflowIdx], true } return runes, false } func (t *Terminal) displayWidthWithLimit(runes []rune, prefixWidth int, limit int) int { width, _ := util.RunesWidth(runes, prefixWidth, t.tabstop, limit) return width } func (t *Terminal) trimLeft(runes []rune, width int) ([]rune, int32) { width = util.Max(0, width) var trimmed int32 // Assume that each rune takes at least one column on screen if len(runes) > width+2 { diff := len(runes) - width - 2 trimmed = int32(diff) runes = runes[diff:] } currentWidth := t.displayWidth(runes) for currentWidth > width && len(runes) > 0 { runes = runes[1:] trimmed++ currentWidth = t.displayWidthWithLimit(runes, 2, width) } return runes, trimmed } func (t *Terminal) overflow(runes []rune, max int) bool { return t.displayWidthWithLimit(runes, 0, max) > max } func (t *Terminal) printHighlighted(result Result, colBase tui.ColorPair, colMatch tui.ColorPair, current bool, match bool) int { item := result.item // Overflow text := make([]rune, item.text.Length()) copy(text, item.text.ToRunes()) matchOffsets := []Offset{} var pos *[]int if match && t.merger.pattern != nil { _, matchOffsets, pos = t.merger.pattern.MatchItem(item, true, t.slab) } charOffsets := matchOffsets if pos != nil { charOffsets = make([]Offset, len(*pos)) for idx, p := range *pos { offset := Offset{int32(p), int32(p + 1)} charOffsets[idx] = offset } sort.Sort(ByOrder(charOffsets)) } var maxe int for _, offset := range charOffsets { maxe = util.Max(maxe, int(offset[1])) } offsets := result.colorOffsets(charOffsets, t.theme, colBase, colMatch, current) maxWidth := t.window.Width() - (t.pointerLen + t.markerLen + 1) ellipsis, ellipsisWidth := util.Truncate(t.ellipsis, maxWidth/2) maxe = util.Constrain(maxe+util.Min(maxWidth/2-ellipsisWidth, t.hscrollOff), 0, len(text)) displayWidth := t.displayWidthWithLimit(text, 0, maxWidth) if displayWidth > maxWidth { transformOffsets := func(diff int32, rightTrim bool) { for idx, offset := range offsets { b, e := offset.offset[0], offset.offset[1] el := int32(len(ellipsis)) b += el - diff e += el - diff b = util.Max32(b, el) if rightTrim { e = util.Min32(e, int32(maxWidth-ellipsisWidth)) } offsets[idx].offset[0] = b offsets[idx].offset[1] = util.Max32(b, e) } } if t.hscroll { if t.keepRight && pos == nil { trimmed, diff := t.trimLeft(text, maxWidth-ellipsisWidth) transformOffsets(diff, false) text = append(ellipsis, trimmed...) } else if !t.overflow(text[:maxe], maxWidth-ellipsisWidth) { // Stri.. text, _ = t.trimRight(text, maxWidth-ellipsisWidth) text = append(text, ellipsis...) } else { // Stri.. rightTrim := false if t.overflow(text[maxe:], ellipsisWidth) { text = append(text[:maxe], ellipsis...) rightTrim = true } // ..ri.. var diff int32 text, diff = t.trimLeft(text, maxWidth-ellipsisWidth) // Transform offsets transformOffsets(diff, rightTrim) text = append(ellipsis, text...) } } else { text, _ = t.trimRight(text, maxWidth-ellipsisWidth) text = append(text, ellipsis...) for idx, offset := range offsets { offsets[idx].offset[0] = util.Min32(offset.offset[0], int32(maxWidth-len(ellipsis))) offsets[idx].offset[1] = util.Min32(offset.offset[1], int32(maxWidth)) } } displayWidth = t.displayWidthWithLimit(text, 0, displayWidth) } var index int32 var substr string var prefixWidth int maxOffset := int32(len(text)) for _, offset := range offsets { b := util.Constrain32(offset.offset[0], index, maxOffset) e := util.Constrain32(offset.offset[1], index, maxOffset) substr, prefixWidth = t.processTabs(text[index:b], prefixWidth) t.window.CPrint(colBase, substr) if b < e { substr, prefixWidth = t.processTabs(text[b:e], prefixWidth) t.window.CPrint(offset.color, substr) } index = e if index >= maxOffset { break } } if index < maxOffset { substr, _ = t.processTabs(text[index:], prefixWidth) t.window.CPrint(colBase, substr) } return displayWidth } func (t *Terminal) renderPreviewSpinner() { numLines := len(t.previewer.lines) spin := t.previewer.spinner if len(spin) > 0 || t.previewer.scrollable { maxWidth := t.pwindow.Width() if !t.previewer.scrollable { if maxWidth > 0 { t.pwindow.Move(0, maxWidth-1) t.pwindow.CPrint(tui.ColSpinner, spin) } } else { offsetString := fmt.Sprintf("%d/%d", t.previewer.offset+1, numLines) if len(spin) > 0 { spin += " " maxWidth -= 2 } offsetRunes, _ := t.trimRight([]rune(offsetString), maxWidth) pos := maxWidth - t.displayWidth(offsetRunes) t.pwindow.Move(0, pos) if maxWidth > 0 { t.pwindow.CPrint(tui.ColSpinner, spin) t.pwindow.CPrint(tui.ColInfo.WithAttr(tui.Reverse), string(offsetRunes)) } } } } func (t *Terminal) renderPreviewArea(unchanged bool) { if unchanged { t.pwindow.MoveAndClear(0, 0) // Clear scroll offset display } else { t.previewed.filled = false t.pwindow.Erase() } height := t.pwindow.Height() header := []string{} body := t.previewer.lines headerLines := t.previewOpts.headerLines // Do not enable preview header lines if it's value is too large if headerLines > 0 && headerLines < util.Min(len(body), height) { header = t.previewer.lines[0:headerLines] body = t.previewer.lines[headerLines:] // Always redraw header t.renderPreviewText(height, header, 0, false) t.pwindow.MoveAndClear(t.pwindow.Y(), 0) } t.renderPreviewText(height, body, -t.previewer.offset+headerLines, unchanged) if !unchanged { t.pwindow.FinishFill() } } func (t *Terminal) renderPreviewText(height int, lines []string, lineNo int, unchanged bool) { maxWidth := t.pwindow.Width() var ansi *ansiState for _, line := range lines { var lbg tui.Color = -1 if ansi != nil { ansi.lbg = -1 } line = strings.TrimSuffix(line, "\n") if lineNo >= height || t.pwindow.Y() == height-1 && t.pwindow.X() > 0 { t.previewed.filled = true t.previewer.scrollable = true break } else if lineNo >= 0 { var fillRet tui.FillReturn prefixWidth := 0 _, _, ansi = extractColor(line, ansi, func(str string, ansi *ansiState) bool { trimmed := []rune(str) isTrimmed := false if !t.previewOpts.wrap { trimmed, isTrimmed = t.trimRight(trimmed, maxWidth-t.pwindow.X()) } str, width := t.processTabs(trimmed, prefixWidth) prefixWidth += width if t.theme.Colored && ansi != nil && ansi.colored() { lbg = ansi.lbg fillRet = t.pwindow.CFill(ansi.fg, ansi.bg, ansi.attr, str) } else { fillRet = t.pwindow.CFill(tui.ColPreview.Fg(), tui.ColPreview.Bg(), tui.AttrRegular, str) } return !isTrimmed && (fillRet == tui.FillContinue || t.previewOpts.wrap && fillRet == tui.FillNextLine) }) t.previewer.scrollable = t.previewer.scrollable || t.pwindow.Y() == height-1 && t.pwindow.X() == t.pwindow.Width() if fillRet == tui.FillNextLine { continue } else if fillRet == tui.FillSuspend { t.previewed.filled = true break } if unchanged && lineNo == 0 { break } if lbg >= 0 { t.pwindow.CFill(-1, lbg, tui.AttrRegular, strings.Repeat(" ", t.pwindow.Width()-t.pwindow.X())+"\n") } else { t.pwindow.Fill("\n") } } lineNo++ } } func (t *Terminal) printPreview() { if !t.hasPreviewWindow() { return } numLines := len(t.previewer.lines) height := t.pwindow.Height() unchanged := (t.previewed.filled || numLines == t.previewed.numLines) && t.previewer.version == t.previewed.version && t.previewer.offset == t.previewed.offset t.previewer.scrollable = t.previewer.offset > 0 || numLines > height t.renderPreviewArea(unchanged) t.renderPreviewSpinner() t.previewed.numLines = numLines t.previewed.version = t.previewer.version t.previewed.offset = t.previewer.offset } func (t *Terminal) printPreviewDelayed() { if !t.hasPreviewWindow() || len(t.previewer.lines) > 0 && t.previewed.version == t.previewer.version { return } t.previewer.scrollable = false t.renderPreviewArea(true) message := t.trimMessage("Loading ..", t.pwindow.Width()) pos := t.pwindow.Width() - len(message) t.pwindow.Move(0, pos) t.pwindow.CPrint(tui.ColInfo.WithAttr(tui.Reverse), message) } func (t *Terminal) processTabs(runes []rune, prefixWidth int) (string, int) { var strbuf strings.Builder l := prefixWidth gr := uniseg.NewGraphemes(string(runes)) for gr.Next() { rs := gr.Runes() str := string(rs) var w int if len(rs) == 1 && rs[0] == '\t' { w = t.tabstop - l%t.tabstop strbuf.WriteString(strings.Repeat(" ", w)) } else { w = runewidth.StringWidth(str) strbuf.WriteString(str) } l += w } return strbuf.String(), l } func (t *Terminal) printAll() { t.resizeWindows() t.printList() t.printPrompt() t.printInfo() t.printHeader() t.printPreview() } func (t *Terminal) refresh() { t.placeCursor() if !t.suppress { windows := make([]tui.Window, 0, 4) if t.borderShape != tui.BorderNone { windows = append(windows, t.border) } if t.hasPreviewWindow() { if t.pborder != nil { windows = append(windows, t.pborder) } windows = append(windows, t.pwindow) } windows = append(windows, t.window) t.tui.RefreshWindows(windows) } } func (t *Terminal) delChar() bool { if len(t.input) > 0 && t.cx < len(t.input) { t.input = append(t.input[:t.cx], t.input[t.cx+1:]...) return true } return false } func findLastMatch(pattern string, str string) int { rx, err := regexp.Compile(pattern) if err != nil { return -1 } locs := rx.FindAllStringIndex(str, -1) if locs == nil { return -1 } prefix := []rune(str[:locs[len(locs)-1][0]]) return len(prefix) } func findFirstMatch(pattern string, str string) int { rx, err := regexp.Compile(pattern) if err != nil { return -1 } loc := rx.FindStringIndex(str) if loc == nil { return -1 } prefix := []rune(str[:loc[0]]) return len(prefix) } func copySlice(slice []rune) []rune { ret := make([]rune, len(slice)) copy(ret, slice) return ret } func (t *Terminal) rubout(pattern string) { pcx := t.cx after := t.input[t.cx:] t.cx = findLastMatch(pattern, string(t.input[:t.cx])) + 1 t.yanked = copySlice(t.input[t.cx:pcx]) t.input = append(t.input[:t.cx], after...) } func keyMatch(key tui.Event, event tui.Event) bool { return event.Type == key.Type && event.Char == key.Char || key.Type == tui.DoubleClick && event.Type == tui.Mouse && event.MouseEvent.Double } func parsePlaceholder(match string) (bool, string, placeholderFlags) { flags := placeholderFlags{} if match[0] == '\\' { // Escaped placeholder pattern return true, match[1:], flags } skipChars := 1 for _, char := range match[1:] { switch char { case '+': flags.plus = true skipChars++ case 's': flags.preserveSpace = true skipChars++ case 'n': flags.number = true skipChars++ case 'f': flags.file = true skipChars++ case 'q': flags.query = true // query flag is not skipped default: break } } matchWithoutFlags := "{" + match[skipChars:] return false, matchWithoutFlags, flags } func hasPreviewFlags(template string) (slot bool, plus bool, query bool) { for _, match := range placeholder.FindAllString(template, -1) { _, _, flags := parsePlaceholder(match) if flags.plus { plus = true } if flags.query { query = true } slot = true } return } func writeTemporaryFile(data []string, printSep string) string { f, err := ioutil.TempFile("", "fzf-preview-*") if err != nil { errorExit("Unable to create temporary file") } defer f.Close() f.WriteString(strings.Join(data, printSep)) f.WriteString(printSep) activeTempFiles = append(activeTempFiles, f.Name()) return f.Name() } func cleanTemporaryFiles() { for _, filename := range activeTempFiles { os.Remove(filename) } activeTempFiles = []string{} } func (t *Terminal) replacePlaceholder(template string, forcePlus bool, input string, list []*Item) string { return replacePlaceholder( template, t.ansi, t.delimiter, t.printsep, forcePlus, input, list) } func (t *Terminal) evaluateScrollOffset() int { if t.pwindow == nil { return 0 } // We only need the current item to calculate the scroll offset offsetExpr := offsetTrimCharsRegex.ReplaceAllString( t.replacePlaceholder(t.previewOpts.scroll, false, "", []*Item{t.currentItem(), nil}), "") atoi := func(s string) int { n, e := strconv.Atoi(s) if e != nil { return 0 } return n } base := -1 height := util.Max(0, t.pwindow.Height()-t.previewOpts.headerLines) for _, component := range offsetComponentRegex.FindAllString(offsetExpr, -1) { if strings.HasPrefix(component, "-/") { component = component[1:] } if component[0] == '/' { denom := atoi(component[1:]) if denom != 0 { base -= height / denom } break } base += atoi(component) } return util.Max(0, base) } func replacePlaceholder(template string, stripAnsi bool, delimiter Delimiter, printsep string, forcePlus bool, query string, allItems []*Item) string { current := allItems[:1] selected := allItems[1:] if current[0] == nil { current = []*Item{} } if selected[0] == nil { selected = []*Item{} } // replace placeholders one by one return placeholder.ReplaceAllStringFunc(template, func(match string) string { escaped, match, flags := parsePlaceholder(match) // this function implements the effects a placeholder has on items var replace func(*Item) string // placeholder types (escaped, query type, item type, token type) switch { case escaped: return match case match == "{q}": return quoteEntry(query) case match == "{}": replace = func(item *Item) string { switch { case flags.number: n := int(item.text.Index) if n < 0 { return "" } return strconv.Itoa(n) case flags.file: return item.AsString(stripAnsi) default: return quoteEntry(item.AsString(stripAnsi)) } } default: // token type and also failover (below) rangeExpressions := strings.Split(match[1:len(match)-1], ",") ranges := make([]Range, len(rangeExpressions)) for idx, s := range rangeExpressions { r, ok := ParseRange(&s) // ellipsis (x..y) and shorthand (x..x) range syntax if !ok { // Invalid expression, just return the original string in the template return match } ranges[idx] = r } replace = func(item *Item) string { tokens := Tokenize(item.AsString(stripAnsi), delimiter) trans := Transform(tokens, ranges) str := joinTokens(trans) // trim the last delimiter if delimiter.str != nil { str = strings.TrimSuffix(str, *delimiter.str) } else if delimiter.regex != nil { delims := delimiter.regex.FindAllStringIndex(str, -1) // make sure the delimiter is at the very end of the string if len(delims) > 0 && delims[len(delims)-1][1] == len(str) { str = str[:delims[len(delims)-1][0]] } } if !flags.preserveSpace { str = strings.TrimSpace(str) } if !flags.file { str = quoteEntry(str) } return str } } // apply 'replace' function over proper set of items and return result items := current if flags.plus || forcePlus { items = selected } replacements := make([]string, len(items)) for idx, item := range items { replacements[idx] = replace(item) } if flags.file { return writeTemporaryFile(replacements, printsep) } return strings.Join(replacements, " ") }) } func (t *Terminal) redraw(clear bool) { if clear { t.tui.Clear() } t.tui.Refresh() t.printAll() } func (t *Terminal) executeCommand(template string, forcePlus bool, background bool) { valid, list := t.buildPlusList(template, forcePlus) if !valid { return } command := t.replacePlaceholder(template, forcePlus, string(t.input), list) cmd := util.ExecCommand(command, false) t.executing.Set(true) if !background { cmd.Stdin = tui.TtyIn() cmd.Stdout = os.Stdout cmd.Stderr = os.Stderr t.tui.Pause(true) cmd.Run() t.tui.Resume(true, false) t.redraw(true) t.refresh() } else { t.tui.Pause(false) cmd.Run() t.tui.Resume(false, false) } t.executing.Set(false) cleanTemporaryFiles() } func (t *Terminal) hasPreviewer() bool { return t.previewBox != nil } func (t *Terminal) isPreviewEnabled() bool { return t.hasPreviewer() && t.previewer.enabled } func (t *Terminal) hasPreviewWindow() bool { return t.pwindow != nil && t.isPreviewEnabled() } func (t *Terminal) currentItem() *Item { cnt := t.merger.Length() if t.cy >= 0 && cnt > 0 && cnt > t.cy { return t.merger.Get(t.cy).item } return nil } func (t *Terminal) buildPlusList(template string, forcePlus bool) (bool, []*Item) { current := t.currentItem() slot, plus, query := hasPreviewFlags(template) if !(!slot || query && len(t.input) > 0 || (forcePlus || plus) && len(t.selected) > 0) { return current != nil, []*Item{current, current} } // We would still want to update preview window even if there is no match if // 1. command template contains {q} and the query string is not empty // 2. or it contains {+} and we have more than one item already selected. // To do so, we pass an empty Item instead of nil to trigger an update. if current == nil { current = &minItem } var sels []*Item if len(t.selected) == 0 { sels = []*Item{current, current} } else { sels = make([]*Item, len(t.selected)+1) sels[0] = current for i, sel := range t.sortSelected() { sels[i+1] = sel.item } } return true, sels } func (t *Terminal) selectItem(item *Item) bool { if len(t.selected) >= t.multi { return false } if _, found := t.selected[item.Index()]; found { return true } t.selected[item.Index()] = selectedItem{time.Now(), item} t.version++ return true } func (t *Terminal) selectItemChanged(item *Item) bool { if _, found := t.selected[item.Index()]; found { return false } return t.selectItem(item) } func (t *Terminal) deselectItem(item *Item) { delete(t.selected, item.Index()) t.version++ } func (t *Terminal) deselectItemChanged(item *Item) bool { if _, found := t.selected[item.Index()]; found { t.deselectItem(item) return true } return false } func (t *Terminal) toggleItem(item *Item) bool { if _, found := t.selected[item.Index()]; !found { return t.selectItem(item) } t.deselectItem(item) return true } func (t *Terminal) killPreview(code int) { select { case t.killChan <- code: default: if code != exitCancel { t.eventBox.Set(EvtQuit, code) } } } func (t *Terminal) cancelPreview() { t.killPreview(exitCancel) } // Loop is called to start Terminal I/O func (t *Terminal) Loop() { // prof := profile.Start(profile.ProfilePath("/tmp/")) <-t.startChan { // Late initialization intChan := make(chan os.Signal, 1) signal.Notify(intChan, os.Interrupt, syscall.SIGTERM) go func() { for s := range intChan { // Don't quit by SIGINT while executing because it should be for the executing command and not for fzf itself if !(s == os.Interrupt && t.executing.Get()) { t.reqBox.Set(reqQuit, nil) } } }() contChan := make(chan os.Signal, 1) notifyOnCont(contChan) go func() { for { <-contChan t.reqBox.Set(reqReinit, nil) } }() resizeChan := make(chan os.Signal, 1) notifyOnResize(resizeChan) // Non-portable go func() { for { <-resizeChan t.reqBox.Set(reqFullRedraw, nil) } }() t.mutex.Lock() t.initFunc() t.resizeWindows() t.printPrompt() t.printInfo() t.printHeader() t.refresh() t.mutex.Unlock() go func() { timer := time.NewTimer(t.initDelay) <-timer.C t.reqBox.Set(reqRefresh, nil) }() // Keep the spinner spinning go func() { for { t.mutex.Lock() reading := t.reading t.mutex.Unlock() time.Sleep(spinnerDuration) if reading { t.reqBox.Set(reqInfo, nil) } } }() } if t.hasPreviewer() { go func() { var version int64 for { var items []*Item var commandTemplate string var pwindow tui.Window initialOffset := 0 t.previewBox.Wait(func(events *util.Events) { for req, value := range *events { switch req { case reqPreviewEnqueue: request := value.(previewRequest) commandTemplate = request.template initialOffset = request.scrollOffset items = request.list pwindow = request.pwindow } } events.Clear() }) version++ // We don't display preview window if no match if items[0] != nil { _, query := t.Input() command := t.replacePlaceholder(commandTemplate, false, string(query), items) cmd := util.ExecCommand(command, true) if pwindow != nil { height := pwindow.Height() env := os.Environ() lines := fmt.Sprintf("LINES=%d", height) columns := fmt.Sprintf("COLUMNS=%d", pwindow.Width()) env = append(env, lines) env = append(env, "FZF_PREVIEW_"+lines) env = append(env, columns) env = append(env, "FZF_PREVIEW_"+columns) cmd.Env = env } out, _ := cmd.StdoutPipe() cmd.Stderr = cmd.Stdout reader := bufio.NewReader(out) eofChan := make(chan bool) finishChan := make(chan bool, 1) err := cmd.Start() if err == nil { reapChan := make(chan bool) lineChan := make(chan eachLine) // Goroutine 1 reads process output go func() { for { line, err := reader.ReadString('\n') lineChan <- eachLine{line, err} if err != nil { break } } eofChan <- true }() // Goroutine 2 periodically requests rendering rendered := util.NewAtomicBool(false) go func(version int64) { lines := []string{} spinner := makeSpinner(t.unicode) spinnerIndex := -1 // Delay initial rendering by an extra tick ticker := time.NewTicker(previewChunkDelay) offset := initialOffset Loop: for { select { case <-ticker.C: if len(lines) > 0 && len(lines) >= initialOffset { if spinnerIndex >= 0 { spin := spinner[spinnerIndex%len(spinner)] t.reqBox.Set(reqPreviewDisplay, previewResult{version, lines, offset, spin}) rendered.Set(true) offset = -1 } spinnerIndex++ } case eachLine := <-lineChan: line := eachLine.line err := eachLine.err if len(line) > 0 { clearIndex := strings.Index(line, clearCode) if clearIndex >= 0 { lines = []string{} line = line[clearIndex+len(clearCode):] version-- offset = 0 } lines = append(lines, line) } if err != nil { t.reqBox.Set(reqPreviewDisplay, previewResult{version, lines, offset, ""}) rendered.Set(true) break Loop } } } ticker.Stop() reapChan <- true }(version) // Goroutine 3 is responsible for cancelling running preview command go func(version int64) { timer := time.NewTimer(previewDelayed) Loop: for { select { case <-timer.C: t.reqBox.Set(reqPreviewDelayed, version) case code := <-t.killChan: if code != exitCancel { util.KillCommand(cmd) t.eventBox.Set(EvtQuit, code) } else { // We can immediately kill a long-running preview program // once we started rendering its partial output delay := previewCancelWait if rendered.Get() { delay = 0 } timer := time.NewTimer(delay) select { case <-timer.C: util.KillCommand(cmd) case <-finishChan: } timer.Stop() } break Loop case <-finishChan: break Loop } } timer.Stop() reapChan <- true }(version) <-eofChan // Goroutine 1 finished cmd.Wait() // NOTE: We should not call Wait before EOF finishChan <- true // Tell Goroutine 3 to stop <-reapChan // Goroutine 2 and 3 finished <-reapChan } else { // Failed to start the command. Report the error immediately. t.reqBox.Set(reqPreviewDisplay, previewResult{version, []string{err.Error()}, 0, ""}) } cleanTemporaryFiles() } else { t.reqBox.Set(reqPreviewDisplay, previewResult{version, nil, 0, ""}) } } }() } refreshPreview := func(command string) { if len(command) > 0 && t.isPreviewEnabled() { _, list := t.buildPlusList(command, false) t.cancelPreview() t.previewBox.Set(reqPreviewEnqueue, previewRequest{command, t.pwindow, t.evaluateScrollOffset(), list}) } } go func() { var focusedIndex int32 = minItem.Index() var version int64 = -1 running := true code := exitError exit := func(getCode func() int) { t.tui.Close() code = getCode() if code <= exitNoMatch && t.history != nil { t.history.append(string(t.input)) } running = false t.mutex.Unlock() } for running { t.reqBox.Wait(func(events *util.Events) { defer events.Clear() t.mutex.Lock() for req, value := range *events { switch req { case reqPrompt: t.printPrompt() if t.noInfoLine() { t.printInfo() } case reqInfo: t.printInfo() case reqList: t.printList() var currentIndex int32 = minItem.Index() currentItem := t.currentItem() if currentItem != nil { currentIndex = currentItem.Index() } if focusedIndex != currentIndex || version != t.version { version = t.version focusedIndex = currentIndex refreshPreview(t.previewOpts.command) } case reqJump: if t.merger.Length() == 0 { t.jumping = jumpDisabled } t.printList() case reqHeader: t.printHeader() case reqRefresh: t.suppress = false case reqReinit: t.tui.Resume(t.fullscreen, t.sigstop) t.redraw(true) case reqRedraw: t.redraw(false) case reqFullRedraw: t.redraw(true) case reqClose: exit(func() int { if t.output() { return exitOk } return exitNoMatch }) return case reqPreviewDisplay: result := value.(previewResult) if t.previewer.version != result.version { t.previewer.version = result.version t.previewer.following = t.previewOpts.follow } t.previewer.lines = result.lines t.previewer.spinner = result.spinner if t.previewer.following { t.previewer.offset = len(t.previewer.lines) - t.pwindow.Height() } else if result.offset >= 0 { t.previewer.offset = util.Constrain(result.offset, t.previewOpts.headerLines, len(t.previewer.lines)-1) } t.printPreview() case reqPreviewRefresh: t.printPreview() case reqPreviewDelayed: t.previewer.version = value.(int64) t.printPreviewDelayed() case reqPrintQuery: exit(func() int { t.printer(string(t.input)) return exitOk }) return case reqQuit: exit(func() int { return exitInterrupt }) return } } t.refresh() t.mutex.Unlock() }) } // prof.Stop() t.killPreview(code) }() looping := true for looping { var newCommand *string changed := false beof := false queryChanged := false event := t.tui.GetChar() t.mutex.Lock() previousInput := t.input previousCx := t.cx events := []util.EventType{} req := func(evts ...util.EventType) { for _, event := range evts { events = append(events, event) if event == reqClose || event == reqQuit { looping = false } } } togglePreview := func(enabled bool) bool { if t.previewer.enabled != enabled { t.previewer.enabled = enabled // We need to immediately update t.pwindow so we don't use reqRedraw t.resizeWindows() req(reqPrompt, reqList, reqInfo, reqHeader) return true } return false } toggle := func() bool { current := t.currentItem() if current != nil && t.toggleItem(current) { req(reqInfo) return true } return false } scrollPreviewTo := func(newOffset int) { if !t.previewer.scrollable { return } t.previewer.following = false numLines := len(t.previewer.lines) if t.previewOpts.cycle { newOffset = (newOffset + numLines) % numLines } newOffset = util.Constrain(newOffset, t.previewOpts.headerLines, numLines-1) if t.previewer.offset != newOffset { t.previewer.offset = newOffset req(reqPreviewRefresh) } } scrollPreviewBy := func(amount int) { scrollPreviewTo(t.previewer.offset + amount) } for key, ret := range t.expect { if keyMatch(key, event) { t.pressed = ret t.reqBox.Set(reqClose, nil) t.mutex.Unlock() return } } actionsFor := func(eventType tui.EventType) []*action { return t.keymap[eventType.AsEvent()] } var doAction func(*action) bool doActions := func(actions []*action) bool { for _, action := range actions { if !doAction(action) { return false } } return true } doAction = func(a *action) bool { switch a.t { case actIgnore: case actExecute, actExecuteSilent: t.executeCommand(a.a, false, a.t == actExecuteSilent) case actExecuteMulti: t.executeCommand(a.a, true, false) case actInvalid: t.mutex.Unlock() return false case actTogglePreview: if t.hasPreviewer() { togglePreview(!t.previewer.enabled) if t.previewer.enabled { valid, list := t.buildPlusList(t.previewOpts.command, false) if valid { t.cancelPreview() t.previewBox.Set(reqPreviewEnqueue, previewRequest{t.previewOpts.command, t.pwindow, t.evaluateScrollOffset(), list}) } } } case actTogglePreviewWrap: if t.hasPreviewWindow() { t.previewOpts.wrap = !t.previewOpts.wrap // Reset preview version so that full redraw occurs t.previewed.version = 0 req(reqPreviewRefresh) } case actToggleSort: t.sort = !t.sort changed = true case actPreviewTop: if t.hasPreviewWindow() { scrollPreviewTo(0) } case actPreviewBottom: if t.hasPreviewWindow() { scrollPreviewTo(len(t.previewer.lines) - t.pwindow.Height()) } case actPreviewUp: if t.hasPreviewWindow() { scrollPreviewBy(-1) } case actPreviewDown: if t.hasPreviewWindow() { scrollPreviewBy(1) } case actPreviewPageUp: if t.hasPreviewWindow() { scrollPreviewBy(-t.pwindow.Height()) } case actPreviewPageDown: if t.hasPreviewWindow() { scrollPreviewBy(t.pwindow.Height()) } case actPreviewHalfPageUp: if t.hasPreviewWindow() { scrollPreviewBy(-t.pwindow.Height() / 2) } case actPreviewHalfPageDown: if t.hasPreviewWindow() { scrollPreviewBy(t.pwindow.Height() / 2) } case actBeginningOfLine: t.cx = 0 case actBackwardChar: if t.cx > 0 { t.cx-- } case actPrintQuery: req(reqPrintQuery) case actChangePrompt: t.prompt, t.promptLen = t.parsePrompt(a.a) req(reqPrompt) case actPreview: togglePreview(true) refreshPreview(a.a) case actRefreshPreview: refreshPreview(t.previewOpts.command) case actReplaceQuery: current := t.currentItem() if current != nil { t.input = current.text.ToRunes() t.cx = len(t.input) } case actAbort: req(reqQuit) case actDeleteChar: t.delChar() case actDeleteCharEOF: if !t.delChar() && t.cx == 0 { req(reqQuit) } case actEndOfLine: t.cx = len(t.input) case actCancel: if len(t.input) == 0 { req(reqQuit) } else { t.yanked = t.input t.input = []rune{} t.cx = 0 } case actBackwardDeleteCharEOF: if len(t.input) == 0 { req(reqQuit) } else if t.cx > 0 { t.input = append(t.input[:t.cx-1], t.input[t.cx:]...) t.cx-- } case actForwardChar: if t.cx < len(t.input) { t.cx++ } case actBackwardDeleteChar: beof = len(t.input) == 0 if t.cx > 0 { t.input = append(t.input[:t.cx-1], t.input[t.cx:]...) t.cx-- } case actSelectAll: if t.multi > 0 { for i := 0; i < t.merger.Length(); i++ { if !t.selectItem(t.merger.Get(i).item) { break } } req(reqList, reqInfo) } case actDeselectAll: if t.multi > 0 { for i := 0; i < t.merger.Length() && len(t.selected) > 0; i++ { t.deselectItem(t.merger.Get(i).item) } req(reqList, reqInfo) } case actClose: if t.isPreviewEnabled() { togglePreview(false) } else { req(reqQuit) } case actSelect: current := t.currentItem() if t.multi > 0 && current != nil && t.selectItemChanged(current) { req(reqList, reqInfo) } case actDeselect: current := t.currentItem() if t.multi > 0 && current != nil && t.deselectItemChanged(current) { req(reqList, reqInfo) } case actToggle: if t.multi > 0 && t.merger.Length() > 0 && toggle() { req(reqList) } case actToggleAll: if t.multi > 0 { prevIndexes := make(map[int]struct{}) for i := 0; i < t.merger.Length() && len(t.selected) > 0; i++ { item := t.merger.Get(i).item if _, found := t.selected[item.Index()]; found { prevIndexes[i] = struct{}{} t.deselectItem(item) } } for i := 0; i < t.merger.Length(); i++ { if _, found := prevIndexes[i]; !found { item := t.merger.Get(i).item if !t.selectItem(item) { break } } } req(reqList, reqInfo) } case actToggleIn: if t.layout != layoutDefault { return doAction(&action{t: actToggleUp}) } return doAction(&action{t: actToggleDown}) case actToggleOut: if t.layout != layoutDefault { return doAction(&action{t: actToggleDown}) } return doAction(&action{t: actToggleUp}) case actToggleDown: if t.multi > 0 && t.merger.Length() > 0 && toggle() { t.vmove(-1, true) req(reqList) } case actToggleUp: if t.multi > 0 && t.merger.Length() > 0 && toggle() { t.vmove(1, true) req(reqList) } case actDown: t.vmove(-1, true) req(reqList) case actUp: t.vmove(1, true) req(reqList) case actAccept: req(reqClose) case actAcceptNonEmpty: if len(t.selected) > 0 || t.merger.Length() > 0 || !t.reading && t.count == 0 { req(reqClose) } case actClearScreen: req(reqFullRedraw) case actClearQuery: t.input = []rune{} t.cx = 0 case actClearSelection: if t.multi > 0 { t.selected = make(map[int32]selectedItem) t.version++ req(reqList, reqInfo) } case actFirst: t.vset(0) req(reqList) case actLast: t.vset(t.merger.Length() - 1) req(reqList) case actUnixLineDiscard: beof = len(t.input) == 0 if t.cx > 0 { t.yanked = copySlice(t.input[:t.cx]) t.input = t.input[t.cx:] t.cx = 0 } case actUnixWordRubout: beof = len(t.input) == 0 if t.cx > 0 { t.rubout("\\s\\S") } case actBackwardKillWord: beof = len(t.input) == 0 if t.cx > 0 { t.rubout(t.wordRubout) } case actYank: suffix := copySlice(t.input[t.cx:]) t.input = append(append(t.input[:t.cx], t.yanked...), suffix...) t.cx += len(t.yanked) case actPageUp: t.vmove(t.maxItems()-1, false) req(reqList) case actPageDown: t.vmove(-(t.maxItems() - 1), false) req(reqList) case actHalfPageUp: t.vmove(t.maxItems()/2, false) req(reqList) case actHalfPageDown: t.vmove(-(t.maxItems() / 2), false) req(reqList) case actJump: t.jumping = jumpEnabled req(reqJump) case actJumpAccept: t.jumping = jumpAcceptEnabled req(reqJump) case actBackwardWord: t.cx = findLastMatch(t.wordRubout, string(t.input[:t.cx])) + 1 case actForwardWord: t.cx += findFirstMatch(t.wordNext, string(t.input[t.cx:])) + 1 case actKillWord: ncx := t.cx + findFirstMatch(t.wordNext, string(t.input[t.cx:])) + 1 if ncx > t.cx { t.yanked = copySlice(t.input[t.cx:ncx]) t.input = append(t.input[:t.cx], t.input[ncx:]...) } case actKillLine: if t.cx < len(t.input) { t.yanked = copySlice(t.input[t.cx:]) t.input = t.input[:t.cx] } case actRune: prefix := copySlice(t.input[:t.cx]) t.input = append(append(prefix, event.Char), t.input[t.cx:]...) t.cx++ case actPreviousHistory: if t.history != nil { t.history.override(string(t.input)) t.input = trimQuery(t.history.previous()) t.cx = len(t.input) } case actNextHistory: if t.history != nil { t.history.override(string(t.input)) t.input = trimQuery(t.history.next()) t.cx = len(t.input) } case actToggleSearch: t.paused = !t.paused changed = !t.paused req(reqPrompt) case actEnableSearch: t.paused = false changed = true req(reqPrompt) case actDisableSearch: t.paused = true req(reqPrompt) case actSigStop: p, err := os.FindProcess(os.Getpid()) if err == nil { t.sigstop = true t.tui.Clear() t.tui.Pause(t.fullscreen) notifyStop(p) t.mutex.Unlock() return false } case actMouse: me := event.MouseEvent mx, my := me.X, me.Y if me.S != 0 { // Scroll if t.window.Enclose(my, mx) && t.merger.Length() > 0 { if t.multi > 0 && me.Mod { toggle() } t.vmove(me.S, true) req(reqList) } else if t.hasPreviewWindow() && t.pwindow.Enclose(my, mx) { scrollPreviewBy(-me.S) } } else if t.window.Enclose(my, mx) { mx -= t.window.Left() my -= t.window.Top() mx = util.Constrain(mx-t.promptLen, 0, len(t.input)) min := 2 + len(t.header) if t.noInfoLine() { min-- } h := t.window.Height() switch t.layout { case layoutDefault: my = h - my - 1 case layoutReverseList: if my < h-min { my += min } else { my = h - my - 1 } } if me.Double { // Double-click if my >= min { if t.vset(t.offset+my-min) && t.cy < t.merger.Length() { return doActions(actionsFor(tui.DoubleClick)) } } } else if me.Down { if my == t.promptLine() && mx >= 0 { // Prompt t.cx = mx + t.xoffset } else if my >= min { // List if t.vset(t.offset+my-min) && t.multi > 0 && me.Mod { toggle() } req(reqList) if me.Left { return doActions(actionsFor(tui.LeftClick)) } return doActions(actionsFor(tui.RightClick)) } } } case actReload: t.failed = nil valid, list := t.buildPlusList(a.a, false) if !valid { // We run the command even when there's no match // 1. If the template doesn't have any slots // 2. If the template has {q} slot, _, query := hasPreviewFlags(a.a) valid = !slot || query } if valid { command := t.replacePlaceholder(a.a, false, string(t.input), list) newCommand = &command t.reading = true } case actUnbind: keys := parseKeyChords(a.a, "PANIC") for key := range keys { delete(t.keymap, key) } case actRebind: keys := parseKeyChords(a.a, "PANIC") for key := range keys { if originalAction, found := t.keymapOrg[key]; found { t.keymap[key] = originalAction } } case actChangePreview: if t.previewOpts.command != a.a { togglePreview(len(a.a) > 0) t.previewOpts.command = a.a refreshPreview(t.previewOpts.command) } case actChangePreviewWindow: currentPreviewOpts := t.previewOpts // Reset preview options and apply the additional options t.previewOpts = t.initialPreviewOpts // Split window options tokens := strings.Split(a.a, "|") parsePreviewWindow(&t.previewOpts, tokens[0]) if len(tokens) > 1 { a.a = strings.Join(append(tokens[1:], tokens[0]), "|") } if t.previewOpts.hidden { togglePreview(false) } else { // Full redraw if !currentPreviewOpts.sameLayout(t.previewOpts) { if togglePreview(true) { refreshPreview(t.previewOpts.command) } else { req(reqRedraw) } } else if !currentPreviewOpts.sameContentLayout(t.previewOpts) { t.previewed.version = 0 req(reqPreviewRefresh) } // Adjust scroll offset if t.hasPreviewWindow() && currentPreviewOpts.scroll != t.previewOpts.scroll { scrollPreviewTo(t.evaluateScrollOffset()) } } } return true } if t.jumping == jumpDisabled { actions := t.keymap[event.Comparable()] if len(actions) == 0 && event.Type == tui.Rune { doAction(&action{t: actRune}) } else if !doActions(actions) { continue } t.truncateQuery() queryChanged = string(previousInput) != string(t.input) changed = changed || queryChanged if onChanges, prs := t.keymap[tui.Change.AsEvent()]; queryChanged && prs { if !doActions(onChanges) { continue } } if onEOFs, prs := t.keymap[tui.BackwardEOF.AsEvent()]; beof && prs { if !doActions(onEOFs) { continue } } } else { if event.Type == tui.Rune { if idx := strings.IndexRune(t.jumpLabels, event.Char); idx >= 0 && idx < t.maxItems() && idx < t.merger.Length() { t.cy = idx + t.offset if t.jumping == jumpAcceptEnabled { req(reqClose) } } } t.jumping = jumpDisabled req(reqList) } if queryChanged { if t.isPreviewEnabled() { _, _, q := hasPreviewFlags(t.previewOpts.command) if q { t.version++ } } } if queryChanged || t.cx != previousCx { req(reqPrompt) } t.mutex.Unlock() // Must be unlocked before touching reqBox if changed || newCommand != nil { t.eventBox.Set(EvtSearchNew, searchRequest{sort: t.sort, command: newCommand}) } for _, event := range events { t.reqBox.Set(event, nil) } } } func (t *Terminal) constrain() { // count of items to display allowed by filtering count := t.merger.Length() // count of lines can be displayed height := t.maxItems() t.cy = util.Constrain(t.cy, 0, count-1) minOffset := util.Max(t.cy-height+1, 0) maxOffset := util.Max(util.Min(count-height, t.cy), 0) t.offset = util.Constrain(t.offset, minOffset, maxOffset) if t.scrollOff == 0 { return } scrollOff := util.Min(height/2, t.scrollOff) for { prevOffset := t.offset if t.cy-t.offset < scrollOff { t.offset = util.Max(minOffset, t.offset-1) } if t.cy-t.offset >= height-scrollOff { t.offset = util.Min(maxOffset, t.offset+1) } if t.offset == prevOffset { break } } } func (t *Terminal) vmove(o int, allowCycle bool) { if t.layout != layoutDefault { o *= -1 } dest := t.cy + o if t.cycle && allowCycle { max := t.merger.Length() - 1 if dest > max { if t.cy == max { dest = 0 } } else if dest < 0 { if t.cy == 0 { dest = max } } } t.vset(dest) } func (t *Terminal) vset(o int) bool { t.cy = util.Constrain(o, 0, t.merger.Length()-1) return t.cy == o } func (t *Terminal) maxItems() int { max := t.window.Height() - 2 - len(t.header) if t.noInfoLine() { max++ } return util.Max(max, 0) }