Add support for more ANSI color attributes (#674)

Dim, underline, blink, reverse

src/ansi.go

@@ -6,6 +6,8 @@ import (
 	"strconv"
 	"strings"
 	"unicode/utf8"
+
+	"github.com/junegunn/fzf/src/curses"
 )
 
 type ansiOffset struct {
@@ -16,18 +18,18 @@ type ansiOffset struct {
 type ansiState struct {
 	fg   int
 	bg   int
-	bold bool
+	attr curses.Attr
 }
 
 func (s *ansiState) colored() bool {
-	return s.fg != -1 || s.bg != -1 || s.bold
+	return s.fg != -1 || s.bg != -1 || s.attr > 0
 }
 
 func (s *ansiState) equals(t *ansiState) bool {
 	if t == nil {
 		return !s.colored()
 	}
-	return s.fg == t.fg && s.bg == t.bg && s.bold == t.bold
+	return s.fg == t.fg && s.bg == t.bg && s.attr == t.attr
 }
 
 var ansiRegex *regexp.Regexp
@@ -94,9 +96,9 @@ func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
 	// State
 	var state *ansiState
 	if prevState == nil {
-		state = &ansiState{-1, -1, false}
+		state = &ansiState{-1, -1, 0}
 	} else {
-		state = &ansiState{prevState.fg, prevState.bg, prevState.bold}
+		state = &ansiState{prevState.fg, prevState.bg, prevState.attr}
 	}
 	if ansiCode[1] != '[' || ansiCode[len(ansiCode)-1] != 'm' {
 		return state
@@ -108,7 +110,7 @@ func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
 	init := func() {
 		state.fg = -1
 		state.bg = -1
-		state.bold = false
+		state.attr = 0
 		state256 = 0
 	}
 
@@ -132,7 +134,15 @@ func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
 				case 49:
 					state.bg = -1
 				case 1:
-					state.bold = true
+					state.attr = curses.Bold
+				case 2:
+					state.attr = curses.Dim
+				case 4:
+					state.attr = curses.Underline
+				case 5:
+					state.attr = curses.Blink
+				case 7:
+					state.attr = curses.Reverse
 				case 0:
 					init()
 				default:

src/curses/curses.go

@@ -23,6 +23,16 @@ import (
 	"unicode/utf8"
 )
 
+const (
+	Bold      = C.A_BOLD
+	Dim       = C.A_DIM
+	Blink     = C.A_BLINK
+	Reverse   = C.A_REVERSE
+	Underline = C.A_UNDERLINE
+)
+
+type Attr C.int
+
 // Types of user action
 const (
 	Rune = iota
@@ -158,7 +168,7 @@ type MouseEvent struct {
 var (
 	_buf          []byte
 	_in           *os.File
-	_color        func(int, bool) C.int
+	_color        func(int, Attr) C.int
 	_colorMap     map[int]int
 	_prevDownTime time.Time
 	_clickY       []int
@@ -183,7 +193,7 @@ type Window struct {
 func NewWindow(top int, left int, width int, height int, border bool) *Window {
 	win := C.newwin(C.int(height), C.int(width), C.int(top), C.int(left))
 	if border {
-		attr := _color(ColBorder, false)
+		attr := _color(ColBorder, 0)
 		C.wattron(win, attr)
 		C.box(win, 0, 0)
 		C.wattroff(win, attr)
@@ -266,22 +276,19 @@ func init() {
 		Border:       145}
 }
 
-func attrColored(pair int, bold bool) C.int {
+func attrColored(pair int, a Attr) C.int {
 	var attr C.int
 	if pair > ColNormal {
 		attr = C.COLOR_PAIR(C.int(pair))
 	}
-	if bold {
+	return attr | C.int(a)
-		attr = attr | C.A_BOLD
-	}
-	return attr
 }
 
-func attrMono(pair int, bold bool) C.int {
+func attrMono(pair int, a Attr) C.int {
 	var attr C.int
 	switch pair {
 	case ColCurrent:
-		if bold {
+		if a&C.A_BOLD == C.A_BOLD {
 			attr = C.A_REVERSE
 		}
 	case ColMatch:
@@ -289,7 +296,7 @@ func attrMono(pair int, bold bool) C.int {
 	case ColCurrentMatch:
 		attr = C.A_UNDERLINE | C.A_REVERSE
 	}
-	if bold {
+	if a&C.A_BOLD == C.A_BOLD {
 		attr = attr | C.A_BOLD
 	}
 	return attr
@@ -648,8 +655,8 @@ func (w *Window) Print(text string) {
 	}, text)))
 }
 
-func (w *Window) CPrint(pair int, bold bool, text string) {
+func (w *Window) CPrint(pair int, a Attr, text string) {
-	attr := _color(pair, bold)
+	attr := _color(pair, a)
 	C.wattron(w.win, attr)
 	w.Print(text)
 	C.wattroff(w.win, attr)
@@ -675,8 +682,8 @@ func (w *Window) Fill(str string) bool {
 	return C.waddstr(w.win, C.CString(str)) == C.OK
 }
 
-func (w *Window) CFill(str string, fg int, bg int, bold bool) bool {
+func (w *Window) CFill(str string, fg int, bg int, a Attr) bool {
-	attr := _color(PairFor(fg, bg), bold)
+	attr := _color(PairFor(fg, bg), a)
 	C.wattron(w.win, attr)
 	ret := w.Fill(str)
 	C.wattroff(w.win, attr)

src/result.go

@@ -14,7 +14,7 @@ type Offset [2]int32
 type colorOffset struct {
 	offset [2]int32
 	color  int
-	bold   bool
+	attr   curses.Attr
 	index  int32
 }
 
@@ -91,14 +91,14 @@ func minRank() rank {
 	return rank{index: 0, points: [4]uint16{math.MaxUint16, 0, 0, 0}}
 }
 
-func (result *Result) colorOffsets(matchOffsets []Offset, color int, bold bool, current bool) []colorOffset {
+func (result *Result) colorOffsets(matchOffsets []Offset, color int, attr curses.Attr, current bool) []colorOffset {
 	itemColors := result.item.Colors()
 
 	if len(itemColors) == 0 {
 		var offsets []colorOffset
 		for _, off := range matchOffsets {
 
-			offsets = append(offsets, colorOffset{offset: [2]int32{off[0], off[1]}, color: color, bold: bold})
+			offsets = append(offsets, colorOffset{offset: [2]int32{off[0], off[1]}, color: color, attr: attr})
 		}
 		return offsets
 	}
@@ -142,7 +142,7 @@ func (result *Result) colorOffsets(matchOffsets []Offset, color int, bold bool,
 		if curr != 0 && idx > start {
 			if curr == -1 {
 				colors = append(colors, colorOffset{
-					offset: [2]int32{int32(start), int32(idx)}, color: color, bold: bold})
+					offset: [2]int32{int32(start), int32(idx)}, color: color, attr: attr})
 			} else {
 				ansi := itemColors[curr-1]
 				fg := ansi.color.fg
@@ -164,7 +164,7 @@ func (result *Result) colorOffsets(matchOffsets []Offset, color int, bold bool,
 				colors = append(colors, colorOffset{
 					offset: [2]int32{int32(start), int32(idx)},
 					color:  curses.PairFor(fg, bg),
-					bold:   ansi.color.bold || bold})
+					attr:   ansi.color.attr | attr})
 			}
 		}
 	}

src/terminal.go

@@ -526,24 +526,24 @@ func (t *Terminal) placeCursor() {
 
 func (t *Terminal) printPrompt() {
 	t.move(0, 0, true)
-	t.window.CPrint(C.ColPrompt, true, t.prompt)
+	t.window.CPrint(C.ColPrompt, C.Bold, t.prompt)
-	t.window.CPrint(C.ColNormal, true, string(t.input))
+	t.window.CPrint(C.ColNormal, C.Bold, string(t.input))
 }
 
 func (t *Terminal) printInfo() {
 	if t.inlineInfo {
 		t.move(0, displayWidth([]rune(t.prompt))+displayWidth(t.input)+1, true)
 		if t.reading {
-			t.window.CPrint(C.ColSpinner, true, " < ")
+			t.window.CPrint(C.ColSpinner, C.Bold, " < ")
 		} else {
-			t.window.CPrint(C.ColPrompt, true, " < ")
+			t.window.CPrint(C.ColPrompt, C.Bold, " < ")
 		}
 	} else {
 		t.move(1, 0, true)
 		if t.reading {
 			duration := int64(spinnerDuration)
 			idx := (time.Now().UnixNano() % (duration * int64(len(_spinner)))) / duration
-			t.window.CPrint(C.ColSpinner, true, _spinner[idx])
+			t.window.CPrint(C.ColSpinner, C.Bold, _spinner[idx])
 		}
 		t.move(1, 2, false)
 	}
@@ -562,7 +562,7 @@ func (t *Terminal) printInfo() {
 	if t.progress > 0 && t.progress < 100 {
 		output += fmt.Sprintf(" (%d%%)", t.progress)
 	}
-	t.window.CPrint(C.ColInfo, false, output)
+	t.window.CPrint(C.ColInfo, 0, output)
 }
 
 func (t *Terminal) printHeader() {
@@ -586,7 +586,7 @@ func (t *Terminal) printHeader() {
 			colors: colors}
 
 		t.move(line, 2, true)
-		t.printHighlighted(&Result{item: item}, false, C.ColHeader, 0, false)
+		t.printHighlighted(&Result{item: item}, 0, C.ColHeader, 0, false)
 	}
 }
 
@@ -620,21 +620,21 @@ func (t *Terminal) printItem(result *Result, i int, current bool) {
 	} else if current {
 		label = ">"
 	}
-	t.window.CPrint(C.ColCursor, true, label)
+	t.window.CPrint(C.ColCursor, C.Bold, label)
 	if current {
 		if selected {
-			t.window.CPrint(C.ColSelected, true, ">")
+			t.window.CPrint(C.ColSelected, C.Bold, ">")
 		} else {
-			t.window.CPrint(C.ColCurrent, true, " ")
+			t.window.CPrint(C.ColCurrent, C.Bold, " ")
 		}
-		t.printHighlighted(result, true, C.ColCurrent, C.ColCurrentMatch, true)
+		t.printHighlighted(result, C.Bold, C.ColCurrent, C.ColCurrentMatch, true)
 	} else {
 		if selected {
-			t.window.CPrint(C.ColSelected, true, ">")
+			t.window.CPrint(C.ColSelected, C.Bold, ">")
 		} else {
 			t.window.Print(" ")
 		}
-		t.printHighlighted(result, false, 0, C.ColMatch, false)
+		t.printHighlighted(result, 0, 0, C.ColMatch, false)
 	}
 }
 
@@ -690,7 +690,7 @@ func overflow(runes []rune, max int) bool {
 	return false
 }
 
-func (t *Terminal) printHighlighted(result *Result, bold bool, col1 int, col2 int, current bool) {
+func (t *Terminal) printHighlighted(result *Result, attr C.Attr, col1 int, col2 int, current bool) {
 	item := result.item
 
 	// Overflow
@@ -715,7 +715,7 @@ func (t *Terminal) printHighlighted(result *Result, bold bool, col1 int, col2 in
 		maxe = util.Max(maxe, int(offset[1]))
 	}
 
-	offsets := result.colorOffsets(charOffsets, col2, bold, current)
+	offsets := result.colorOffsets(charOffsets, col2, attr, current)
 	maxWidth := t.window.Width - 3
 	maxe = util.Constrain(maxe+util.Min(maxWidth/2-2, t.hscrollOff), 0, len(text))
 	if overflow(text, maxWidth) {
@@ -764,11 +764,11 @@ func (t *Terminal) printHighlighted(result *Result, bold bool, col1 int, col2 in
 		e := util.Constrain32(offset.offset[1], index, maxOffset)
 
 		substr, prefixWidth = processTabs(text[index:b], prefixWidth)
-		t.window.CPrint(col1, bold, substr)
+		t.window.CPrint(col1, attr, substr)
 
 		if b < e {
 			substr, prefixWidth = processTabs(text[b:e], prefixWidth)
-			t.window.CPrint(offset.color, offset.bold, substr)
+			t.window.CPrint(offset.color, offset.attr, substr)
 		}
 
 		index = e
@@ -778,7 +778,7 @@ func (t *Terminal) printHighlighted(result *Result, bold bool, col1 int, col2 in
 	}
 	if index < maxOffset {
 		substr, _ = processTabs(text[index:], prefixWidth)
-		t.window.CPrint(col1, bold, substr)
+		t.window.CPrint(col1, attr, substr)
 	}
 }
 
@@ -812,7 +812,7 @@ func (t *Terminal) printPreview() {
 			}
 		}
 		if ansi != nil && ansi.colored() {
-			return t.pwindow.CFill(str, ansi.fg, ansi.bg, ansi.bold)
+			return t.pwindow.CFill(str, ansi.fg, ansi.bg, ansi.attr)
 		}
 		return t.pwindow.Fill(str)
 	})