Reorganize source code

src/Makefile

@@ -33,7 +33,7 @@ build: fzf/$(BINARY32) fzf/$(BINARY64)
 
 test:
 	go get
-	go test -v
+	go test -v ./...
 
 install: $(BINDIR)/fzf
 

src/algo/algo.go

@@ -1,4 +1,4 @@
-package fzf
+package algo
 
 import "strings"
 

src/algo/algo_test.go

@@ -1,4 +1,4 @@
-package fzf
+package algo
 
 import (
 	"strings"

src/chunklist.go

@@ -8,20 +8,20 @@ const ChunkSize int = 100
 // Chunk is a list of Item pointers whose size has the upper limit of ChunkSize
 type Chunk []*Item // >>> []Item
 
-// Transformer is a closure type that builds Item object from a pointer to a
+// ItemBuilder is a closure type that builds Item object from a pointer to a
 // string and an integer
-type Transformer func(*string, int) *Item
+type ItemBuilder func(*string, int) *Item
 
 // ChunkList is a list of Chunks
 type ChunkList struct {
 	chunks []*Chunk
 	count  int
 	mutex  sync.Mutex
-	trans  Transformer
+	trans  ItemBuilder
 }
 
 // NewChunkList returns a new ChunkList
-func NewChunkList(trans Transformer) *ChunkList {
+func NewChunkList(trans ItemBuilder) *ChunkList {
 	return &ChunkList{
 		chunks: []*Chunk{},
 		count:  0,
@@ -29,7 +29,7 @@ func NewChunkList(trans Transformer) *ChunkList {
 		trans:  trans}
 }
 
-func (c *Chunk) push(trans Transformer, data *string, index int) {
+func (c *Chunk) push(trans ItemBuilder, data *string, index int) {
 	*c = append(*c, trans(data, index))
 }
 

src/constants.go

@@ -1,14 +1,15 @@
 package fzf
 
+import (
+	"github.com/junegunn/fzf/src/util"
+)
+
 // Current version
 const Version = "0.9.0"
 
-// EventType is the type for fzf events
-type EventType int
-
 // fzf events
 const (
-	EvtReadNew EventType = iota
+	EvtReadNew util.EventType = iota
 	EvtReadFin
 	EvtSearchNew
 	EvtSearchProgress

src/core.go

@@ -30,6 +30,8 @@ import (
 	"os"
 	"runtime"
 	"time"
+
+	"github.com/junegunn/fzf/src/util"
 )
 
 const coordinatorDelayMax time.Duration = 100 * time.Millisecond
@@ -59,7 +61,7 @@ func Run(options *Options) {
 	}
 
 	// Event channel
-	eventBox := NewEventBox()
+	eventBox := util.NewEventBox()
 
 	// Chunk list
 	var chunkList *ChunkList
@@ -111,7 +113,7 @@ func Run(options *Options) {
 		looping := true
 		eventBox.Unwatch(EvtReadNew)
 		for looping {
-			eventBox.Wait(func(events *Events) {
+			eventBox.Wait(func(events *util.Events) {
 				for evt := range *events {
 					switch evt {
 					case EvtReadFin:
@@ -154,7 +156,7 @@ func Run(options *Options) {
 	for {
 		delay := true
 		ticks++
-		eventBox.Wait(func(events *Events) {
+		eventBox.Wait(func(events *util.Events) {
 			defer events.Clear()
 			for evt, value := range *events {
 				switch evt {
@@ -185,7 +187,7 @@ func Run(options *Options) {
 			}
 		})
 		if delay && reading {
-			dur := DurWithin(
+			dur := util.DurWithin(
 				time.Duration(ticks)*coordinatorDelayStep,
 				0, coordinatorDelayMax)
 			time.Sleep(dur)

src/matcher.go

@@ -6,6 +6,8 @@ import (
 	"sort"
 	"sync"
 	"time"
+
+	"github.com/junegunn/fzf/src/util"
 )
 
 // MatchRequest represents a search request
@@ -18,14 +20,14 @@ type MatchRequest struct {
 type Matcher struct {
 	patternBuilder func([]rune) *Pattern
 	sort           bool
-	eventBox       *EventBox
-	reqBox         *EventBox
+	eventBox       *util.EventBox
+	reqBox         *util.EventBox
 	partitions     int
 	mergerCache    map[string]*Merger
 }
 
 const (
-	reqRetry EventType = iota
+	reqRetry util.EventType = iota
 	reqReset
 )
 
@@ -35,12 +37,12 @@ const (
 
 // NewMatcher returns a new Matcher
 func NewMatcher(patternBuilder func([]rune) *Pattern,
-	sort bool, eventBox *EventBox) *Matcher {
+	sort bool, eventBox *util.EventBox) *Matcher {
 	return &Matcher{
 		patternBuilder: patternBuilder,
 		sort:           sort,
 		eventBox:       eventBox,
-		reqBox:         NewEventBox(),
+		reqBox:         util.NewEventBox(),
 		partitions:     runtime.NumCPU(),
 		mergerCache:    make(map[string]*Merger)}
 }
@@ -52,7 +54,7 @@ func (m *Matcher) Loop() {
 	for {
 		var request MatchRequest
 
-		m.reqBox.Wait(func(events *Events) {
+		m.reqBox.Wait(func(events *util.Events) {
 			for _, val := range *events {
 				switch val := val.(type) {
 				case MatchRequest:
@@ -128,7 +130,7 @@ func (m *Matcher) scan(request MatchRequest, limit int) (*Merger, bool) {
 	}
 	pattern := request.pattern
 	empty := pattern.IsEmpty()
-	cancelled := NewAtomicBool(false)
+	cancelled := util.NewAtomicBool(false)
 
 	slices := m.sliceChunks(request.chunks)
 	numSlices := len(slices)
@@ -202,7 +204,7 @@ func (m *Matcher) scan(request MatchRequest, limit int) (*Merger, bool) {
 func (m *Matcher) Reset(chunks []*Chunk, patternRunes []rune, cancel bool) {
 	pattern := m.patternBuilder(patternRunes)
 
-	var event EventType
+	var event util.EventType
 	if cancel {
 		event = reqReset
 	} else {

src/options.go

@@ -2,10 +2,11 @@ package fzf
 
 import (
 	"fmt"
-	"github.com/junegunn/go-shellwords"
 	"os"
 	"regexp"
 	"strings"
+
+	"github.com/junegunn/go-shellwords"
 )
 
 const usage = `usage: fzf [options]

src/pattern.go

@@ -4,6 +4,8 @@ import (
 	"regexp"
 	"sort"
 	"strings"
+
+	"github.com/junegunn/fzf/src/algo"
 )
 
 const uppercaseLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
@@ -112,10 +114,10 @@ func BuildPattern(mode Mode, caseMode Case,
 		delimiter:     delimiter,
 		procFun:       make(map[termType]func(bool, *string, []rune) (int, int))}
 
-	ptr.procFun[termFuzzy] = FuzzyMatch
-	ptr.procFun[termExact] = ExactMatchNaive
-	ptr.procFun[termPrefix] = PrefixMatch
-	ptr.procFun[termSuffix] = SuffixMatch
+	ptr.procFun[termFuzzy] = algo.FuzzyMatch
+	ptr.procFun[termExact] = algo.ExactMatchNaive
+	ptr.procFun[termPrefix] = algo.PrefixMatch
+	ptr.procFun[termSuffix] = algo.SuffixMatch
 
 	_patternCache[asString] = ptr
 	return ptr
@@ -245,7 +247,7 @@ func (p *Pattern) fuzzyMatch(chunk *Chunk) []*Item {
 	matches := []*Item{}
 	for _, item := range *chunk {
 		input := p.prepareInput(item)
-		if sidx, eidx := p.iter(FuzzyMatch, input, p.text); sidx >= 0 {
+		if sidx, eidx := p.iter(algo.FuzzyMatch, input, p.text); sidx >= 0 {
 			matches = append(matches,
 				dupItem(item, []Offset{Offset{int32(sidx), int32(eidx)}}))
 		}

src/pattern_test.go

@@ -1,6 +1,10 @@
 package fzf
 
-import "testing"
+import (
+	"testing"
+
+	"github.com/junegunn/fzf/src/algo"
+)
 
 func TestParseTermsExtended(t *testing.T) {
 	terms := parseTerms(ModeExtended,
@@ -55,7 +59,7 @@ func TestExact(t *testing.T) {
 	pattern := BuildPattern(ModeExtended, CaseSmart,
 		[]Range{}, nil, []rune("'abc"))
 	str := "aabbcc abc"
-	sidx, eidx := ExactMatchNaive(pattern.caseSensitive, &str, pattern.terms[0].text)
+	sidx, eidx := algo.ExactMatchNaive(pattern.caseSensitive, &str, pattern.terms[0].text)
 	if sidx != 7 || eidx != 10 {
 		t.Errorf("%s / %d / %d", pattern.terms, sidx, eidx)
 	}

src/reader.go

@@ -1,13 +1,12 @@
 package fzf
 
-// #include <unistd.h>
-import "C"
-
 import (
 	"bufio"
 	"io"
 	"os"
 	"os/exec"
+
+	"github.com/junegunn/fzf/src/util"
 )
 
 const defaultCommand = `find * -path '*/\.*' -prune -o -type f -print -o -type l -print 2> /dev/null`
@@ -15,12 +14,12 @@ const defaultCommand = `find * -path '*/\.*' -prune -o -type f -print -o -type l
 // Reader reads from command or standard input
 type Reader struct {
 	pusher   func(string)
-	eventBox *EventBox
+	eventBox *util.EventBox
 }
 
 // ReadSource reads data from the default command or from standard input
 func (r *Reader) ReadSource() {
-	if int(C.isatty(C.int(os.Stdin.Fd()))) != 0 {
+	if util.IsTty() {
 		cmd := os.Getenv("FZF_DEFAULT_COMMAND")
 		if len(cmd) == 0 {
 			cmd = defaultCommand

src/reader_test.go

@@ -1,10 +1,14 @@
 package fzf
 
-import "testing"
+import (
+	"testing"
+
+	"github.com/junegunn/fzf/src/util"
+)
 
 func TestReadFromCommand(t *testing.T) {
 	strs := []string{}
-	eb := NewEventBox()
+	eb := util.NewEventBox()
 	reader := Reader{
 		pusher:   func(s string) { strs = append(strs, s) },
 		eventBox: eb}
@@ -26,7 +30,7 @@ func TestReadFromCommand(t *testing.T) {
 	}
 
 	// Wait should return immediately
-	eb.Wait(func(events *Events) {
+	eb.Wait(func(events *util.Events) {
 		if _, found := (*events)[EvtReadNew]; !found {
 			t.Errorf("%s", events)
 		}

src/terminal.go

@@ -2,13 +2,16 @@ package fzf
 
 import (
 	"fmt"
-	C "github.com/junegunn/fzf/src/curses"
-	"github.com/junegunn/go-runewidth"
 	"os"
 	"regexp"
 	"sort"
 	"sync"
 	"time"
+
+	C "github.com/junegunn/fzf/src/curses"
+	"github.com/junegunn/fzf/src/util"
+
+	"github.com/junegunn/go-runewidth"
 )
 
 // Terminal represents terminal input/output
@@ -28,8 +31,8 @@ type Terminal struct {
 	reading    bool
 	merger     *Merger
 	selected   map[*string]*string
-	reqBox     *EventBox
-	eventBox   *EventBox
+	reqBox     *util.EventBox
+	eventBox   *util.EventBox
 	mutex      sync.Mutex
 	initFunc   func()
 	suppress   bool
@@ -38,7 +41,7 @@ type Terminal struct {
 var _spinner = []string{`-`, `\`, `|`, `/`, `-`, `\`, `|`, `/`}
 
 const (
-	reqPrompt EventType = iota
+	reqPrompt util.EventType = iota
 	reqInfo
 	reqList
 	reqRefresh
@@ -53,7 +56,7 @@ const (
 )
 
 // NewTerminal returns new Terminal object
-func NewTerminal(opts *Options, eventBox *EventBox) *Terminal {
+func NewTerminal(opts *Options, eventBox *util.EventBox) *Terminal {
 	input := []rune(opts.Query)
 	return &Terminal{
 		prompt:     opts.Prompt,
@@ -68,7 +71,7 @@ func NewTerminal(opts *Options, eventBox *EventBox) *Terminal {
 		printQuery: opts.PrintQuery,
 		merger:     EmptyMerger,
 		selected:   make(map[*string]*string),
-		reqBox:     NewEventBox(),
+		reqBox:     util.NewEventBox(),
 		eventBox:   eventBox,
 		mutex:      sync.Mutex{},
 		suppress:   true,
@@ -288,7 +291,7 @@ func (*Terminal) printHighlighted(item *Item, bold bool, col1 int, col2 int) {
 				b, e := offset[0], offset[1]
 				b += 2 - diff
 				e += 2 - diff
-				b = Max32(b, 2)
+				b = util.Max32(b, 2)
 				if b < e {
 					offsets[idx] = Offset{b, e}
 				}
@@ -300,8 +303,8 @@ func (*Terminal) printHighlighted(item *Item, bold bool, col1 int, col2 int) {
 	sort.Sort(ByOrder(offsets))
 	var index int32
 	for _, offset := range offsets {
-		b := Max32(index, offset[0])
-		e := Max32(index, offset[1])
+		b := util.Max32(index, offset[0])
+		e := util.Max32(index, offset[1])
 		C.CPrint(col1, bold, string(text[index:b]))
 		C.CPrint(col2, bold, string(text[b:e]))
 		index = e
@@ -388,7 +391,7 @@ func (t *Terminal) Loop() {
 
 	go func() {
 		for {
-			t.reqBox.Wait(func(events *Events) {
+			t.reqBox.Wait(func(events *util.Events) {
 				defer events.Clear()
 				t.mutex.Lock()
 				for req := range *events {
@@ -426,8 +429,8 @@ func (t *Terminal) Loop() {
 
 		t.mutex.Lock()
 		previousInput := t.input
-		events := []EventType{reqPrompt}
-		req := func(evts ...EventType) {
+		events := []util.EventType{reqPrompt}
+		req := func(evts ...util.EventType) {
 			for _, event := range evts {
 				events = append(events, event)
 				if event == reqClose || event == reqQuit {
@@ -538,7 +541,7 @@ func (t *Terminal) Loop() {
 			t.cx++
 		case C.Mouse:
 			me := event.MouseEvent
-			mx, my := Min(len(t.input), Max(0, me.X-len(t.prompt))), me.Y
+			mx, my := util.Constrain(me.X-len(t.prompt), 0, len(t.input)), me.Y
 			if !t.reverse {
 				my = C.MaxY() - my - 1
 			}
@@ -588,7 +591,7 @@ func (t *Terminal) constrain() {
 	height := C.MaxY() - 2
 	diffpos := t.cy - t.offset
 
-	t.cy = Max(0, Min(t.cy, count-1))
+	t.cy = util.Constrain(t.cy, 0, count-1)
 
 	if t.cy > t.offset+(height-1) {
 		// Ceil
@@ -600,8 +603,8 @@ func (t *Terminal) constrain() {
 
 	// Adjustment
 	if count-t.offset < height {
-		t.offset = Max(0, count-height)
-		t.cy = Max(0, Min(t.offset+diffpos, count-1))
+		t.offset = util.Max(0, count-height)
+		t.cy = util.Constrain(t.offset+diffpos, 0, count-1)
 	}
 }
 
@@ -614,7 +617,7 @@ func (t *Terminal) vmove(o int) {
 }
 
 func (t *Terminal) vset(o int) bool {
-	t.cy = Max(0, Min(o, t.merger.Length()-1))
+	t.cy = util.Constrain(o, 0, t.merger.Length()-1)
 	return t.cy == o
 }
 

src/tokenizer.go

@@ -4,6 +4,8 @@ import (
 	"regexp"
 	"strconv"
 	"strings"
+
+	"github.com/junegunn/fzf/src/util"
 )
 
 const rangeEllipsis = 0
@@ -180,7 +182,7 @@ func Transform(tokens []Token, withNth []Range) *Transformed {
 					end += numTokens + 1
 				}
 			}
-			minIdx = Max(0, begin-1)
+			minIdx = util.Max(0, begin-1)
 			for idx := begin; idx <= end; idx++ {
 				if idx >= 1 && idx <= numTokens {
 					part += *tokens[idx-1].text

src/util/atomicbool.go

@@ -1,4 +1,4 @@
-package fzf
+package util
 
 import "sync"
 

src/util/atomicbool_test.go

@@ -1,4 +1,4 @@
-package fzf
+package util
 
 import "testing"
 

src/util/eventbox.go

@@ -1,7 +1,10 @@
-package fzf
+package util
 
 import "sync"
 
+// EventType is the type for fzf events
+type EventType int
+
 // Events is a type that associates EventType to any data
 type Events map[EventType]interface{}
 

src/util/eventbox_test.go

@@ -1,7 +1,17 @@
-package fzf
+package util
 
 import "testing"
 
+// fzf events
+const (
+	EvtReadNew EventType = iota
+	EvtReadFin
+	EvtSearchNew
+	EvtSearchProgress
+	EvtSearchFin
+	EvtClose
+)
+
 func TestEventBox(t *testing.T) {
 	eb := NewEventBox()
 

src/util/util.go

@@ -1,6 +1,12 @@
-package fzf
+package util
 
-import "time"
+// #include <unistd.h>
+import "C"
+
+import (
+	"os"
+	"time"
+)
 
 // Max returns the largest integer
 func Max(first int, items ...int) int {
@@ -21,15 +27,15 @@ func Max32(first int32, second int32) int32 {
 	return second
 }
 
-// Min returns the smallest integer
-func Min(first int, items ...int) int {
-	min := first
-	for _, item := range items {
-		if item < min {
-			min = item
-		}
+// Constrain limits the given integer with the upper and lower bounds
+func Constrain(val int, min int, max int) int {
+	if val < min {
+		return min
 	}
-	return min
+	if val > max {
+		return max
+	}
+	return val
 }
 
 // DurWithin limits the given time.Duration with the upper and lower bounds
@@ -43,3 +49,8 @@ func DurWithin(
 	}
 	return val
 }
+
+// IsTty returns true is stdin is a terminal
+func IsTty() bool {
+	return int(C.isatty(C.int(os.Stdin.Fd()))) != 0
+}

src/util/util_test.go

@@ -0,0 +1,22 @@
+package util
+
+import "testing"
+
+func TestMax(t *testing.T) {
+	if Max(-2, 5, 1, 4, 3) != 5 {
+		t.Error("Invalid result")
+	}
+}
+
+func TestContrain(t *testing.T) {
+	if Constrain(-3, -1, 3) != -1 {
+		t.Error("Expected", -1)
+	}
+	if Constrain(2, -1, 3) != 2 {
+		t.Error("Expected", 2)
+	}
+
+	if Constrain(5, -1, 3) != 3 {
+		t.Error("Expected", 3)
+	}
+}

src/util_test.go

@@ -1,18 +0,0 @@
-package fzf
-
-import "testing"
-
-func TestMax(t *testing.T) {
-	if Max(-2, 5, 1, 4, 3) != 5 {
-		t.Error("Invalid result")
-	}
-}
-
-func TestMin(t *testing.T) {
-	if Min(2, -3) != -3 {
-		t.Error("Invalid result")
-	}
-	if Min(-2, 5, 1, 4, 3) != -2 {
-		t.Error("Invalid result")
-	}
-}