コード例 #1
0
ファイル: terminal.go プロジェクト: sergei-dyshel/fzf
func (t *Terminal) constrain() {
	count := t.merger.Length()
	height := t.maxItems()
	diffpos := t.cy - t.offset

	t.cy = util.Constrain(t.cy, 0, count-1)
	t.offset = util.Constrain(t.offset, t.cy-height+1, t.cy)
	// Adjustment
	if count-t.offset < height {
		t.offset = util.Max(0, count-height)
		t.cy = util.Constrain(t.offset+diffpos, 0, count-1)
	}
	t.offset = util.Max(0, t.offset)
}
コード例 #2
0
ファイル: terminal.go プロジェクト: sergei-dyshel/fzf
// Loop is called to start Terminal I/O
func (t *Terminal) Loop() {
	<-t.startChan
	{ // Late initialization
		intChan := make(chan os.Signal, 1)
		signal.Notify(intChan, os.Interrupt, os.Kill, syscall.SIGTERM)
		go func() {
			<-intChan
			t.reqBox.Set(reqQuit, nil)
		}()

		resizeChan := make(chan os.Signal, 1)
		signal.Notify(resizeChan, syscall.SIGWINCH)
		go func() {
			for {
				<-resizeChan
				t.reqBox.Set(reqRedraw, nil)
			}
		}()

		t.mutex.Lock()
		t.initFunc()
		t.calculateMargins()
		t.printPrompt()
		t.placeCursor()
		C.Refresh()
		t.printInfo()
		t.printHeader()
		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()
				if !reading {
					break
				}
				time.Sleep(spinnerDuration)
				t.reqBox.Set(reqInfo, nil)
			}
		}()
	}

	exit := func(code int) {
		if code <= exitNoMatch && t.history != nil {
			t.history.append(string(t.input))
		}
		os.Exit(code)
	}

	go func() {
		for {
			t.reqBox.Wait(func(events *util.Events) {
				defer events.Clear()
				t.mutex.Lock()
				for req := range *events {
					switch req {
					case reqPrompt:
						t.printPrompt()
						if t.inlineInfo {
							t.printInfo()
						}
					case reqInfo:
						t.printInfo()
					case reqList:
						t.printList()
					case reqHeader:
						t.printHeader()
					case reqRefresh:
						t.suppress = false
					case reqRedraw:
						C.Clear()
						C.Endwin()
						C.Refresh()
						t.printAll()
					case reqClose:
						C.Close()
						if t.output() {
							exit(exitOk)
						}
						exit(exitNoMatch)
					case reqQuit:
						C.Close()
						exit(exitInterrupt)
					}
				}
				t.placeCursor()
				t.mutex.Unlock()
			})
			t.refresh()
		}
	}()

	looping := true
	for looping {
		event := C.GetChar()

		t.mutex.Lock()
		previousInput := t.input
		events := []util.EventType{reqPrompt}
		req := func(evts ...util.EventType) {
			for _, event := range evts {
				events = append(events, event)
				if event == reqClose || event == reqQuit {
					looping = false
				}
			}
		}
		selectItem := func(item *Item) bool {
			if _, found := t.selected[item.Index()]; !found {
				t.selected[item.Index()] = selectedItem{time.Now(), item.StringPtr(t.ansi)}
				return true
			}
			return false
		}
		toggleY := func(y int) {
			item := t.merger.Get(y)
			if !selectItem(item) {
				delete(t.selected, item.Index())
			}
		}
		toggle := func() {
			if t.cy < t.merger.Length() {
				toggleY(t.cy)
				req(reqInfo)
			}
		}
		for key, ret := range t.expect {
			if keyMatch(key, event) {
				t.pressed = ret
				req(reqClose)
				break
			}
		}

		var doAction func(actionType, int) bool
		doAction = func(action actionType, mapkey int) bool {
			switch action {
			case actIgnore:
			case actExecute:
				if t.cy >= 0 && t.cy < t.merger.Length() {
					item := t.merger.Get(t.cy)
					executeCommand(t.execmap[mapkey], quoteEntry(item.AsString(t.ansi)))
				}
			case actExecuteMulti:
				if len(t.selected) > 0 {
					sels := make([]string, len(t.selected))
					for i, sel := range t.sortSelected() {
						sels[i] = quoteEntry(*sel.text)
					}
					executeCommand(t.execmap[mapkey], strings.Join(sels, " "))
				} else {
					return doAction(actExecute, mapkey)
				}
			case actInvalid:
				t.mutex.Unlock()
				return false
			case actToggleSort:
				t.sort = !t.sort
				t.eventBox.Set(EvtSearchNew, t.sort)
				t.mutex.Unlock()
				return false
			case actBeginningOfLine:
				t.cx = 0
			case actBackwardChar:
				if t.cx > 0 {
					t.cx--
				}
			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 actForwardChar:
				if t.cx < len(t.input) {
					t.cx++
				}
			case actBackwardDeleteChar:
				if t.cx > 0 {
					t.input = append(t.input[:t.cx-1], t.input[t.cx:]...)
					t.cx--
				}
			case actSelectAll:
				if t.multi {
					for i := 0; i < t.merger.Length(); i++ {
						item := t.merger.Get(i)
						selectItem(item)
					}
					req(reqList, reqInfo)
				}
			case actDeselectAll:
				if t.multi {
					for i := 0; i < t.merger.Length(); i++ {
						item := t.merger.Get(i)
						delete(t.selected, item.Index())
					}
					req(reqList, reqInfo)
				}
			case actToggle:
				if t.multi && t.merger.Length() > 0 {
					toggle()
					req(reqList)
				}
			case actToggleAll:
				if t.multi {
					for i := 0; i < t.merger.Length(); i++ {
						toggleY(i)
					}
					req(reqList, reqInfo)
				}
			case actToggleIn:
				if t.reverse {
					return doAction(actToggleUp, mapkey)
				}
				return doAction(actToggleDown, mapkey)
			case actToggleOut:
				if t.reverse {
					return doAction(actToggleDown, mapkey)
				}
				return doAction(actToggleUp, mapkey)
			case actToggleDown:
				if t.multi && t.merger.Length() > 0 {
					toggle()
					t.vmove(-1)
					req(reqList)
				}
			case actToggleUp:
				if t.multi && t.merger.Length() > 0 {
					toggle()
					t.vmove(1)
					req(reqList)
				}
			case actDown:
				t.vmove(-1)
				req(reqList)
			case actUp:
				t.vmove(1)
				req(reqList)
			case actAccept:
				req(reqClose)
			case actClearScreen:
				req(reqRedraw)
			case actUnixLineDiscard:
				if t.cx > 0 {
					t.yanked = copySlice(t.input[:t.cx])
					t.input = t.input[t.cx:]
					t.cx = 0
				}
			case actUnixWordRubout:
				if t.cx > 0 {
					t.rubout("\\s\\S")
				}
			case actBackwardKillWord:
				if t.cx > 0 {
					t.rubout("[^[:alnum:]][[:alnum:]]")
				}
			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)
				req(reqList)
			case actPageDown:
				t.vmove(-(t.maxItems() - 1))
				req(reqList)
			case actBackwardWord:
				t.cx = findLastMatch("[^[:alnum:]][[:alnum:]]", string(t.input[:t.cx])) + 1
			case actForwardWord:
				t.cx += findFirstMatch("[[:alnum:]][^[:alnum:]]|(.$)", string(t.input[t.cx:])) + 1
			case actKillWord:
				ncx := t.cx +
					findFirstMatch("[[:alnum:]][^[:alnum:]]|(.$)", 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 = []rune(t.history.previous())
					t.cx = len(t.input)
				}
			case actNextHistory:
				if t.history != nil {
					t.history.override(string(t.input))
					t.input = []rune(t.history.next())
					t.cx = len(t.input)
				}
			case actMouse:
				me := event.MouseEvent
				mx, my := me.X, me.Y
				if me.S != 0 {
					// Scroll
					if t.merger.Length() > 0 {
						if t.multi && me.Mod {
							toggle()
						}
						t.vmove(me.S)
						req(reqList)
					}
				} else if mx >= t.marginInt[3] && mx < C.MaxX()-t.marginInt[1] &&
					my >= t.marginInt[0] && my < C.MaxY()-t.marginInt[2] {
					mx -= t.marginInt[3]
					my -= t.marginInt[0]
					mx = util.Constrain(mx-displayWidth([]rune(t.prompt)), 0, len(t.input))
					if !t.reverse {
						my = t.maxHeight() - my - 1
					}
					min := 2 + len(t.header)
					if t.inlineInfo {
						min--
					}
					if me.Double {
						// Double-click
						if my >= min {
							if t.vset(t.offset+my-min) && t.cy < t.merger.Length() {
								return doAction(t.keymap[C.DoubleClick], C.DoubleClick)
							}
						}
					} else if me.Down {
						if my == 0 && mx >= 0 {
							// Prompt
							t.cx = mx
						} else if my >= min {
							// List
							if t.vset(t.offset+my-min) && t.multi && me.Mod {
								toggle()
							}
							req(reqList)
						}
					}
				}
			}
			return true
		}
		action := t.keymap[event.Type]
		mapkey := event.Type
		if event.Type == C.Rune {
			mapkey = int(event.Char) + int(C.AltZ)
			if act, prs := t.keymap[mapkey]; prs {
				action = act
			}
		}
		if !doAction(action, mapkey) {
			continue
		}
		changed := string(previousInput) != string(t.input)
		t.mutex.Unlock() // Must be unlocked before touching reqBox

		if changed {
			t.eventBox.Set(EvtSearchNew, t.sort)
		}
		for _, event := range events {
			t.reqBox.Set(event, nil)
		}
	}
}
コード例 #3
0
ファイル: terminal.go プロジェクト: sergei-dyshel/fzf
func (t *Terminal) printHighlighted(item *Item, bold bool, col1 int, col2 int, current bool) {
	var maxe int
	for _, offset := range item.offsets {
		maxe = util.Max(maxe, int(offset[1]))
	}

	// Overflow
	text := make([]rune, len(item.text))
	copy(text, item.text)
	offsets := item.colorOffsets(col2, bold, current)
	maxWidth := C.MaxX() - 3 - t.marginInt[1] - t.marginInt[3]
	maxe = util.Constrain(maxe+util.Min(maxWidth/2-2, t.hscrollOff), 0, len(text))
	fullWidth := displayWidth(text)
	if fullWidth > maxWidth {
		if t.hscroll {
			// Stri..
			matchEndWidth := displayWidth(text[:maxe])
			if matchEndWidth <= maxWidth-2 {
				text, _ = trimRight(text, maxWidth-2)
				text = append(text, []rune("..")...)
			} else {
				// Stri..
				if matchEndWidth < fullWidth-2 {
					text = append(text[:maxe], []rune("..")...)
				}
				// ..ri..
				var diff int32
				text, diff = trimLeft(text, maxWidth-2)

				// Transform offsets
				for idx, offset := range offsets {
					b, e := offset.offset[0], offset.offset[1]
					b += 2 - diff
					e += 2 - diff
					b = util.Max32(b, 2)
					offsets[idx].offset[0] = b
					offsets[idx].offset[1] = util.Max32(b, e)
				}
				text = append([]rune(".."), text...)
			}
		} else {
			text, _ = trimRight(text, maxWidth-2)
			text = append(text, []rune("..")...)

			for idx, offset := range offsets {
				offsets[idx].offset[0] = util.Min32(offset.offset[0], int32(maxWidth-2))
				offsets[idx].offset[1] = util.Min32(offset.offset[1], int32(maxWidth))
			}
		}
	}

	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 = processTabs(text[index:b], prefixWidth)
		C.CPrint(col1, bold, substr)

		if b < e {
			substr, prefixWidth = processTabs(text[b:e], prefixWidth)
			C.CPrint(offset.color, offset.bold, substr)
		}

		index = e
		if index >= maxOffset {
			break
		}
	}
	if index < maxOffset {
		substr, _ = processTabs(text[index:], prefixWidth)
		C.CPrint(col1, bold, substr)
	}
}
コード例 #4
0
ファイル: terminal.go プロジェクト: sergei-dyshel/fzf
func (t *Terminal) vset(o int) bool {
	t.cy = util.Constrain(o, 0, t.merger.Length()-1)
	return t.cy == o
}