switch to go-term-text to fix bad underflow for label rendering

4 files changed, 0 insertions, 804 deletions

diff --git a/util/text/left_padded.go b/util/text/left_padded.go
deleted file mode 100644
index eae65d34..00000000
--- a/util/text/left_padded.go
+++ /dev/null
@@ -1,42 +0,0 @@
-package text
-
-import (
-	"bytes"
-	"fmt"
-	"github.com/mattn/go-runewidth"
-	"strings"
-)
-
-// LeftPadMaxLine pads a string on the left by a specified amount and pads the
-// string on the right to fill the maxLength
-func LeftPadMaxLine(text string, length, leftPad int) string {
-	var rightPart string = text
-
-	scrWidth := runewidth.StringWidth(text)
-	// truncate and ellipse if needed
-	if scrWidth+leftPad > length {
-		rightPart = runewidth.Truncate(text, length-leftPad, "…")
-	} else if scrWidth+leftPad < length {
-		rightPart = runewidth.FillRight(text, length-leftPad)
-	}
-
-	return fmt.Sprintf("%s%s",
-		strings.Repeat(" ", leftPad),
-		rightPart,
-	)
-}
-
-// LeftPad left pad each line of the given text
-func LeftPad(text string, leftPad int) string {
-	var result bytes.Buffer
-
-	pad := strings.Repeat(" ", leftPad)
-
-	for _, line := range strings.Split(text, "\n") {
-		result.WriteString(pad)
-		result.WriteString(line)
-		result.WriteString("\n")
-	}
-
-	return result.String()
-}
diff --git a/util/text/left_padded_test.go b/util/text/left_padded_test.go
deleted file mode 100644
index 0be79e32..00000000
--- a/util/text/left_padded_test.go
+++ /dev/null
@@ -1,56 +0,0 @@
-package text
-
-import "testing"
-
-func TestLeftPadMaxLine(t *testing.T) {
-	cases := []struct {
-		input, output  string
-		maxValueLength int
-		leftPad        int
-	}{
-		{
-			"foo",
-			"foo ",
-			4,
-			0,
-		},
-		{
-			"foofoofoo",
-			"foo…",
-			4,
-			0,
-		},
-		{
-			"foo",
-			"foo       ",
-			10,
-			0,
-		},
-		{
-			"foo",
-			"  f…",
-			4,
-			2,
-		},
-		{
-			"foofoofoo",
-			"  foo…",
-			6,
-			2,
-		},
-		{
-			"foo",
-			"  foo     ",
-			10,
-			2,
-		},
-	}
-
-	for i, tc := range cases {
-		result := LeftPadMaxLine(tc.input, tc.maxValueLength, tc.leftPad)
-		if result != tc.output {
-			t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Output:\n\n`%s`\n\nActual Output:\n\n`%s`",
-				i, tc.input, tc.output, result)
-		}
-	}
-}
diff --git a/util/text/text.go b/util/text/text.go
deleted file mode 100644
index 39584d5d..00000000
--- a/util/text/text.go
+++ /dev/null
@@ -1,330 +0,0 @@
-package text
-
-import (
-	"github.com/mattn/go-runewidth"
-	"strings"
-	"unicode/utf8"
-)
-
-// Force runewidth not to treat ambiguous runes as wide chars, so that things
-// like unicode ellipsis/up/down/left/right glyphs can have correct runewidth
-// and can be displayed correctly in terminals.
-func init() {
-	runewidth.DefaultCondition.EastAsianWidth = false
-}
-
-// Wrap a text for an exact line size
-// Handle properly terminal color escape code
-func Wrap(text string, lineWidth int) (string, int) {
-	return WrapLeftPadded(text, lineWidth, 0)
-}
-
-// Wrap a text for an exact line size with a left padding
-// Handle properly terminal color escape code
-func WrapLeftPadded(text string, lineWidth int, leftPad int) (string, int) {
-	var lines []string
-	nbLine := 0
-	pad := strings.Repeat(" ", leftPad)
-
-	// tabs are formatted as 4 spaces
-	text = strings.Replace(text, "\t", "    ", -1)
-	// NOTE: text is first segmented into lines so that softwrapLine can handle.
-	for _, line := range strings.Split(text, "\n") {
-		if line == "" || strings.TrimSpace(line) == "" {
-			lines = append(lines, "")
-			nbLine++
-		} else {
-			wrapped := softwrapLine(line, lineWidth-leftPad)
-			firstLine := true
-			for _, seg := range strings.Split(wrapped, "\n") {
-				if firstLine {
-					lines = append(lines, pad+strings.TrimRight(seg, " "))
-					firstLine = false
-				} else {
-					lines = append(lines, pad+strings.TrimSpace(seg))
-				}
-				nbLine++
-			}
-		}
-	}
-	return strings.Join(lines, "\n"), nbLine
-}
-
-// Break a line into several lines so that each line consumes at most
-// 'textWidth' cells.  Lines break at groups of white spaces and multibyte
-// chars. Nothing is removed from the original text so that it behaves like a
-// softwrap.
-//
-// Required: The line shall not contain '\n'
-//
-// WRAPPING ALGORITHM: The line is broken into non-breakable chunks, then line
-// breaks ("\n") are inserted between these groups so that the total length
-// between breaks does not exceed the required width. Words that are longer than
-// the textWidth are broken into pieces no longer than textWidth.
-//
-func softwrapLine(line string, textWidth int) string {
-	// NOTE: terminal escapes are stripped out of the line so the algorithm is
-	// simpler. Do not try to mix them in the wrapping algorithm, as it can get
-	// complicated quickly.
-	line1, termEscapes := extractTermEscapes(line)
-
-	chunks := segmentLine(line1)
-	// Reverse the chunk array so we can use it as a stack.
-	for i, j := 0, len(chunks)-1; i < j; i, j = i+1, j-1 {
-		chunks[i], chunks[j] = chunks[j], chunks[i]
-	}
-	var line2 string = ""
-	var width int = 0
-	for len(chunks) > 0 {
-		thisWord := chunks[len(chunks)-1]
-		wl := wordLen(thisWord)
-		if width+wl <= textWidth {
-			line2 += chunks[len(chunks)-1]
-			chunks = chunks[:len(chunks)-1]
-			width += wl
-			if width == textWidth && len(chunks) > 0 {
-				// NOTE: new line begins when current line is full and there are more
-				// chunks to come.
-				line2 += "\n"
-				width = 0
-			}
-		} else if wl > textWidth {
-			// NOTE: By default, long words are splited to fill the remaining space.
-			// But if the long words is the first non-space word in the middle of the
-			// line, preceeding spaces shall not be counted in word spliting.
-			splitWidth := textWidth - width
-			if strings.HasSuffix(line2, "\n"+strings.Repeat(" ", width)) {
-				splitWidth += width
-			}
-			left, right := splitWord(chunks[len(chunks)-1], splitWidth)
-			chunks[len(chunks)-1] = right
-			line2 += left + "\n"
-			width = 0
-		} else {
-			line2 += "\n"
-			width = 0
-		}
-	}
-
-	line3 := applyTermEscapes(line2, termEscapes)
-	return line3
-}
-
-// EscapeItem: Storage of terminal escapes in a line. 'item' is the actural
-// escape command, and 'pos' is the index in the rune array where the 'item'
-// shall be inserted back. For example, the escape item in "F\x1b33mox" is
-// {"\x1b33m", 1}.
-type escapeItem struct {
-	item string
-	pos  int
-}
-
-// Extract terminal escapes out of a line, returns a new line without terminal
-// escapes and a slice of escape items. The terminal escapes can be inserted
-// back into the new line at rune index 'item.pos' to recover the original line.
-//
-// Required: The line shall not contain "\n"
-//
-func extractTermEscapes(line string) (string, []escapeItem) {
-	var termEscapes []escapeItem
-	var line1 string
-
-	pos := 0
-	item := ""
-	occupiedRuneCount := 0
-	inEscape := false
-	for i, r := range []rune(line) {
-		if r == '\x1b' {
-			pos = i
-			item = string(r)
-			inEscape = true
-			continue
-		}
-		if inEscape {
-			item += string(r)
-			if r == 'm' {
-				termEscapes = append(termEscapes, escapeItem{item, pos - occupiedRuneCount})
-				occupiedRuneCount += utf8.RuneCountInString(item)
-				inEscape = false
-			}
-			continue
-		}
-		line1 += string(r)
-	}
-
-	return line1, termEscapes
-}
-
-// Apply the extracted terminal escapes to the edited line. The only edit
-// allowed is to insert "\n" like that in softwrapLine. Callers shall ensure
-// this since this function is not able to check it.
-func applyTermEscapes(line string, escapes []escapeItem) string {
-	if len(escapes) == 0 {
-		return line
-	}
-
-	var out string = ""
-
-	currPos := 0
-	currItem := 0
-	for _, r := range line {
-		if currItem < len(escapes) && currPos == escapes[currItem].pos {
-			// NOTE: We avoid terminal escapes at the end of a line by move them one
-			// pass the end of line, so that algorithms who trim right spaces are
-			// happy. But algorithms who trim left spaces are still unhappy.
-			if r == '\n' {
-				out += "\n" + escapes[currItem].item
-			} else {
-				out += escapes[currItem].item + string(r)
-				currPos++
-			}
-			currItem++
-		} else {
-			if r != '\n' {
-				currPos++
-			}
-			out += string(r)
-		}
-	}
-
-	// Don't forget the trailing escape, if any.
-	if currItem == len(escapes)-1 && currPos == escapes[currItem].pos {
-		out += escapes[currItem].item
-	}
-
-	return out
-}
-
-// Segment a line into chunks, where each chunk consists of chars with the same
-// type and is not breakable.
-func segmentLine(s string) []string {
-	var chunks []string
-
-	var word string
-	wordType := none
-	flushWord := func() {
-		chunks = append(chunks, word)
-		word = ""
-		wordType = none
-	}
-
-	for _, r := range s {
-		// A WIDE_CHAR itself constitutes a chunk.
-		thisType := runeType(r)
-		if thisType == wideChar {
-			if wordType != none {
-				flushWord()
-			}
-			chunks = append(chunks, string(r))
-			continue
-		}
-		// Other type of chunks starts with a char of that type, and ends with a
-		// char with different type or end of string.
-		if thisType != wordType {
-			if wordType != none {
-				flushWord()
-			}
-			word = string(r)
-			wordType = thisType
-		} else {
-			word += string(r)
-		}
-	}
-	if word != "" {
-		flushWord()
-	}
-
-	return chunks
-}
-
-// Rune categories
-//
-// These categories are so defined that each category forms a non-breakable
-// chunk. It IS NOT the same as unicode code point categories.
-//
-const (
-	none int = iota
-	wideChar
-	invisible
-	shortUnicode
-	space
-	visibleAscii
-)
-
-// Determine the category of a rune.
-func runeType(r rune) int {
-	rw := runewidth.RuneWidth(r)
-	if rw > 1 {
-		return wideChar
-	} else if rw == 0 {
-		return invisible
-	} else if r > 127 {
-		return shortUnicode
-	} else if r == ' ' {
-		return space
-	} else {
-		return visibleAscii
-	}
-}
-
-// wordLen return the length of a word, while ignoring the terminal escape
-// sequences
-func wordLen(word string) int {
-	length := 0
-	escape := false
-
-	for _, char := range word {
-		if char == '\x1b' {
-			escape = true
-		}
-		if !escape {
-			length += runewidth.RuneWidth(rune(char))
-		}
-		if char == 'm' {
-			escape = false
-		}
-	}
-
-	return length
-}
-
-// splitWord split a word at the given length, while ignoring the terminal escape sequences
-func splitWord(word string, length int) (string, string) {
-	runes := []rune(word)
-	var result []rune
-	added := 0
-	escape := false
-
-	if length == 0 {
-		return "", word
-	}
-
-	for _, r := range runes {
-		if r == '\x1b' {
-			escape = true
-		}
-
-		width := runewidth.RuneWidth(r)
-		if width+added > length {
-			// wide character made the length overflow
-			break
-		}
-
-		result = append(result, r)
-
-		if !escape {
-			added += width
-			if added >= length {
-				break
-			}
-		}
-
-		if r == 'm' {
-			escape = false
-		}
-	}
-
-	leftover := runes[len(result):]
-
-	return string(result), string(leftover)
-}
diff --git a/util/text/text_test.go b/util/text/text_test.go
deleted file mode 100644
index 5be25409..00000000
--- a/util/text/text_test.go
+++ /dev/null
@@ -1,376 +0,0 @@
-package text
-
-import (
-	"reflect"
-	"strings"
-	"testing"
-)
-
-func TestWrap(t *testing.T) {
-	cases := []struct {
-		Input, Output string
-		Lim           int
-	}{
-		// A simple word passes through.
-		{
-			"foo",
-			"foo",
-			4,
-		},
-		// Word breaking
-		{
-			"foobarbaz",
-			"foob\narba\nz",
-			4,
-		},
-		// Lines are broken at whitespace.
-		{
-			"foo bar baz",
-			"foo\nbar\nbaz",
-			4,
-		},
-		// Word breaking
-		{
-			"foo bars bazzes",
-			"foo\nbars\nbazz\nes",
-			4,
-		},
-		// A word that would run beyond the width is wrapped.
-		{
-			"fo sop",
-			"fo\nsop",
-			4,
-		},
-		// A tab counts as 4 characters.
-		{
-			"foo\nb\t r\n baz",
-			"foo\nb\nr\n baz",
-			4,
-		},
-		// Trailing whitespace is removed after used for wrapping.
-		// Runs of whitespace on which a line is broken are removed.
-		{
-			"foo    \nb   ar   ",
-			"foo\n\nb\nar\n",
-			4,
-		},
-		// An explicit line break at the end of the input is preserved.
-		{
-			"foo bar baz\n",
-			"foo\nbar\nbaz\n",
-			4,
-		},
-		// Explicit break are always preserved.
-		{
-			"\nfoo bar\n\n\nbaz\n",
-			"\nfoo\nbar\n\n\nbaz\n",
-			4,
-		},
-		// Ignore complete words with terminal color sequence
-		{
-			"foo \x1b[31mbar\x1b[0m baz",
-			"foo\n\x1b[31mbar\x1b[0m\nbaz",
-			4,
-		},
-		// Handle words with colors sequence inside the word
-		{
-			"foo b\x1b[31mbar\x1b[0mr baz",
-			"foo\nb\x1b[31mbar\n\x1b[0mr\nbaz",
-			4,
-		},
-		// Break words with colors sequence inside the word
-		{
-			"foo bb\x1b[31mbar\x1b[0mr baz",
-			"foo\nbb\x1b[31mba\nr\x1b[0mr\nbaz",
-			4,
-		},
-		// Complete example:
-		{
-			" This is a list: \n\n\t* foo\n\t* bar\n\n\n\t* baz  \nBAM    ",
-			" This\nis a\nlist:\n\n    *\nfoo\n    *\nbar\n\n\n    *\nbaz\nBAM\n",
-			6,
-		},
-		// Handle chinese (wide characters)
-		{
-			"一只敏捷的狐狸跳过了一只懒狗。",
-			"一只敏捷的狐\n狸跳过了一只\n懒狗。",
-			12,
-		},
-		// Handle chinese with colors
-		{
-			"一只敏捷的\x1b[31m狐狸跳过\x1b[0m了一只懒狗。",
-			"一只敏捷的\x1b[31m狐\n狸跳过\x1b[0m了一只\n懒狗。",
-			12,
-		},
-		// Handle mixed wide and short characters
-		{
-			"敏捷 A quick 的狐狸 fox 跳过 jumps over a lazy 了一只懒狗 dog。",
-			"敏捷 A quick\n的狐狸 fox\n跳过 jumps\nover a lazy\n了一只懒狗\ndog。",
-			12,
-		},
-		// Handle mixed wide and short characters with color
-		{
-			"敏捷 A \x1b31mquick 的狐狸 fox 跳\x1b0m过 jumps over a lazy 了一只懒狗 dog。",
-			"敏捷 A \x1b31mquick\n的狐狸 fox\n跳\x1b0m过 jumps\nover a lazy\n了一只懒狗\ndog。",
-			12,
-		},
-	}
-
-	for i, tc := range cases {
-		actual, lines := Wrap(tc.Input, tc.Lim)
-		if actual != tc.Output {
-			t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Output:\n\n`%s`\n\nActual Output:\n\n`%s`",
-				i, tc.Input, tc.Output, actual)
-		}
-
-		expected := len(strings.Split(tc.Output, "\n"))
-		if expected != lines {
-			t.Fatalf("Case %d Nb lines mismatch\nExpected:%d\nActual:%d",
-				i, expected, lines)
-		}
-	}
-}
-
-func TestWrapLeftPadded(t *testing.T) {
-	cases := []struct {
-		input, output string
-		lim, pad      int
-	}{
-		{
-			"The Lorem ipsum text is typically composed of pseudo-Latin words. It is commonly used as placeholder text to examine or demonstrate the visual effects of various graphic design.",
-			`    The Lorem ipsum text is typically composed of
-    pseudo-Latin words. It is commonly used as placeholder
-    text to examine or demonstrate the visual effects of
-    various graphic design.`,
-			59, 4,
-		},
-		// Handle Chinese
-		{
-			"婞一枳郲逴靲屮蜧曀殳，掫乇峔掮傎溒兀緉冘仜。郼牪艽螗媷錵朸一詅掜豗怙刉笀丌，楀棶乇矹迡搦囷圣亍昄漚粁仈祂。覂一洳袶揙楱亍滻瘯毌，掗屮柅軡菵腩乜榵毌夯。勼哻怌婇怤灟葠雺奷朾恦扰衪岨坋誁乇芚誙腞。冇笉妺悆浂鱦賌廌灱灱觓坋佫呬耴跣兀枔蓔輈。嵅咍犴膰痭瘰机一靬涽捊矷尒玶乇，煚塈丌岰陊鉖怞戉兀甿跾觓夬侄。棩岧汌橩僁螗玎一逭舴圂衪扐衲兀，嵲媕亍衩衿溽昃夯丌侄蒰扂丱呤。毰侘妅錣廇螉仴一暀淖蚗佶庂咺丌，輀鈁乇彽洢溦洰氶乇构碨洐巿阹。",
-			`    婞一枳郲逴靲屮蜧曀殳，掫乇峔掮傎溒兀緉冘仜。郼牪艽螗媷
-    錵朸一詅掜豗怙刉笀丌，楀棶乇矹迡搦囷圣亍昄漚粁仈祂。覂
-    一洳袶揙楱亍滻瘯毌，掗屮柅軡菵腩乜榵毌夯。勼哻怌婇怤灟
-    葠雺奷朾恦扰衪岨坋誁乇芚誙腞。冇笉妺悆浂鱦賌廌灱灱觓坋
-    佫呬耴跣兀枔蓔輈。嵅咍犴膰痭瘰机一靬涽捊矷尒玶乇，煚塈
-    丌岰陊鉖怞戉兀甿跾觓夬侄。棩岧汌橩僁螗玎一逭舴圂衪扐衲
-    兀，嵲媕亍衩衿溽昃夯丌侄蒰扂丱呤。毰侘妅錣廇螉仴一暀淖
-    蚗佶庂咺丌，輀鈁乇彽洢溦洰氶乇构碨洐巿阹。`,
-			59, 4,
-		},
-		// Handle long unbreakable words in a full stentence
-		{
-			"OT: there are alternatives to maintainer-/user-set priority, e.g. \"[user pain](http://www.lostgarden.com/2008/05/improving-bug-triage-with-user-pain.html)\".",
-			`    OT: there are alternatives to maintainer-/user-set
-    priority, e.g. "[user pain](http://www.lostgarden.com/
-    2008/05/improving-bug-triage-with-user-pain.html)".`,
-			58, 4,
-		},
-	}
-
-	for i, tc := range cases {
-		actual, lines := WrapLeftPadded(tc.input, tc.lim, tc.pad)
-		if actual != tc.output {
-			t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Output:\n`\n%s`\n\nActual Output:\n`\n%s\n%s`",
-				i, tc.input, tc.output,
-				"|"+strings.Repeat("-", tc.lim-2)+"|",
-				actual)
-		}
-
-		expected := len(strings.Split(tc.output, "\n"))
-		if expected != lines {
-			t.Fatalf("Case %d Nb lines mismatch\nExpected:%d\nActual:%d",
-				i, expected, lines)
-		}
-	}
-}
-
-func TestWordLen(t *testing.T) {
-	cases := []struct {
-		Input  string
-		Length int
-	}{
-		// A simple word
-		{
-			"foo",
-			3,
-		},
-		// A simple word with colors
-		{
-			"\x1b[31mbar\x1b[0m",
-			3,
-		},
-		// Handle prefix and suffix properly
-		{
-			"foo\x1b[31mfoobarHoy\x1b[0mbaaar",
-			17,
-		},
-		// Handle chinese
-		{
-			"快檢什麼望對",
-			12,
-		},
-		// Handle chinese with colors
-		{
-			"快\x1b[31m檢什麼\x1b[0m望對",
-			12,
-		},
-	}
-
-	for i, tc := range cases {
-		l := wordLen(tc.Input)
-		if l != tc.Length {
-			t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Output:\n\n`%d`\n\nActual Output:\n\n`%d`",
-				i, tc.Input, tc.Length, l)
-		}
-	}
-}
-
-func TestSplitWord(t *testing.T) {
-	cases := []struct {
-		Input            string
-		Length           int
-		Result, Leftover string
-	}{
-		// A simple word passes through.
-		{
-			"foo",
-			4,
-			"foo", "",
-		},
-		// Cut at the right place
-		{
-			"foobarHoy",
-			4,
-			"foob", "arHoy",
-		},
-		// A simple word passes through with colors
-		{
-			"\x1b[31mbar\x1b[0m",
-			4,
-			"\x1b[31mbar\x1b[0m", "",
-		},
-		// Cut at the right place with colors
-		{
-			"\x1b[31mfoobarHoy\x1b[0m",
-			4,
-			"\x1b[31mfoob", "arHoy\x1b[0m",
-		},
-		// Handle prefix and suffix properly
-		{
-			"foo\x1b[31mfoobarHoy\x1b[0mbaaar",
-			4,
-			"foo\x1b[31mf", "oobarHoy\x1b[0mbaaar",
-		},
-		// Cut properly with length = 0
-		{
-			"foo",
-			0,
-			"", "foo",
-		},
-		// Handle chinese
-		{
-			"快檢什麼望對",
-			4,
-			"快檢", "什麼望對",
-		},
-		{
-			"快檢什麼望對",
-			5,
-			"快檢", "什麼望對",
-		},
-		// Handle chinese with colors
-		{
-			"快\x1b[31m檢什麼\x1b[0m望對",
-			4,
-			"快\x1b[31m檢", "什麼\x1b[0m望對",
-		},
-	}
-
-	for i, tc := range cases {
-		result, leftover := splitWord(tc.Input, tc.Length)
-		if result != tc.Result || leftover != tc.Leftover {
-			t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Output:\n\n`%s` - `%s`\n\nActual Output:\n\n`%s` - `%s`",
-				i, tc.Input, tc.Result, tc.Leftover, result, leftover)
-		}
-	}
-}
-
-func TestExtractApplyTermEscapes(t *testing.T) {
-	cases := []struct {
-		Input       string
-		Output      string
-		TermEscapes []escapeItem
-	}{
-		// A plain ascii line with escapes.
-		{
-			"This \x1b[31mis an\x1b[0m example.",
-			"This is an example.",
-			[]escapeItem{{"\x1b[31m", 5}, {"\x1b[0m", 10}},
-		},
-		// Escape at the end
-		{
-			"This \x1b[31mis an example.\x1b[0m",
-			"This is an example.",
-			[]escapeItem{{"\x1b[31m", 5}, {"\x1b[0m", 19}},
-		},
-		// A plain wide line with escapes.
-		{
-			"一只敏捷\x1b[31m的狐狸\x1b[0m跳过了一只懒狗。",
-			"一只敏捷的狐狸跳过了一只懒狗。",
-			[]escapeItem{{"\x1b[31m", 4}, {"\x1b[0m", 7}},
-		},
-		// A normal-wide mixed line with escapes.
-		{
-			"一只 A Quick 敏捷\x1b[31m的狐 Fox 狸\x1b[0m跳过了Dog一只懒狗。",
-			"一只 A Quick 敏捷的狐 Fox 狸跳过了Dog一只懒狗。",
-			[]escapeItem{{"\x1b[31m", 13}, {"\x1b[0m", 21}},
-		},
-	}
-
-	for i, tc := range cases {
-		line2, escapes := extractTermEscapes(tc.Input)
-		if line2 != tc.Output || !reflect.DeepEqual(escapes, tc.TermEscapes) {
-			t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Output:\n\nLine: `%s`\nEscapes: `%+v`\n\nActual Output:\n\nLine: `%s`\nEscapes: `%+v`\n\n",
-				i, tc.Input, tc.Output, tc.TermEscapes, line2, escapes)
-		}
-		line3 := applyTermEscapes(line2, escapes)
-		if line3 != tc.Input {
-			t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Result:\n\n`%s`\n\nActual Result:\n\n`%s`\n\n",
-				i, tc.Input, tc.Input, line3)
-		}
-	}
-}
-
-func TestSegmentLines(t *testing.T) {
-	cases := []struct {
-		Input  string
-		Output []string
-	}{
-		// A plain ascii line with escapes.
-		{
-			"This is an example.",
-			[]string{"This", " ", "is", " ", "an", " ", "example."},
-		},
-		// A plain wide line with escapes.
-		{
-			"一只敏捷的狐狸跳过了一只懒狗。",
-			[]string{"一", "只", "敏", "捷", "的", "狐", "狸", "跳", "过",
-				"了", "一", "只", "懒", "狗", "。"},
-		},
-		// A complex stentence.
-		{
-			"This is a 'complex' example, where   一只 and English 混合了。",
-			[]string{"This", " ", "is", " ", "a", " ", "'complex'", " ", "example,",
-				" ", "where", "   ", "一", "只", " ", "and", " ", "English", " ", "混",
-				"合", "了", "。"},
-		},
-	}
-
-	for i, tc := range cases {
-		chunks := segmentLine(tc.Input)
-		if !reflect.DeepEqual(chunks, tc.Output) {
-			t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Output:\n\n`[%s]`\n\nActual Output:\n\n`[%s]`\n\n",
-				i, tc.Input, strings.Join(tc.Output, ", "), strings.Join(chunks, ", "))
-		}
-	}
-}