Move wcswidth into its own package as it is very slow to build

.gitattributes

@@ -15,7 +15,7 @@ kittens/diff/options/parse.py linguist-generated=true
 glfw/*.c linguist-vendored=true
 glfw/*.h linguist-vendored=true
 kittens/unicode_input/names.h linguist-generated=true
-tools/tui/wcwidth-std.go linguist-generated=true
+tools/wcswidth/std.go linguist-generated=true
 
 *.py  text diff=python
 *.m  text diff=objc

count-lines-of-code

@@ -21,7 +21,7 @@ kitty/options/parse.py
 kitty/options/to-c-generated.h
 kittens/diff/options/types.py
 kittens/diff/options/parse.py
-tools/tui/wcwidth-std.go
+tools/wcswidth/std.go
 '''
 
 ignored = []

gen-wcwidth.py

@@ -560,10 +560,10 @@ def gen_wcwidth() -> None:
         else:
             p('\treturn 1;\n}')
 
-    with create_header('kitty/wcwidth-std.h') as p, open('tools/tui/wcwidth-std.go', 'w') as gof:
+    with create_header('kitty/wcwidth-std.h') as p, open('tools/wcswidth/std.go', 'w') as gof:
         gop = partial(print, file=gof)
-        gop('package tui\n\n')
-        gop('func Wcwidth(code rune) int {')
+        gop('package wcswidth\n\n')
+        gop('func Runewidth(code rune) int {')
         p('static inline int\nwcwidth_std(int32_t code) {')
         p('\tif (LIKELY(0x20 <= code && code <= 0x7e)) { return 1; }')
         p('\tswitch(code) {')

tools/cli/infrastructure.go

@@ -16,8 +16,8 @@ import (
 
 	"kitty"
 	"kitty/tools/tty"
-	"kitty/tools/tui"
 	"kitty/tools/utils"
+	"kitty/tools/wcswidth"
 )
 
 var RootCmd *cobra.Command
@@ -120,7 +120,7 @@ func format_line_with_indent(output io.Writer, text string, indent string, scree
 	var escapes strings.Builder
 
 	print_word := func(r rune) {
-		w := tui.Wcswidth(current_word.String())
+		w := wcswidth.Stringwidth(current_word.String())
 		if x+w > screen_width {
 			fmt.Fprintln(output)
 			fmt.Fprint(output, indent)

tools/cmd/at/main.go

@@ -18,6 +18,7 @@ import (
 	"kitty/tools/cli"
 	"kitty/tools/crypto"
 	"kitty/tools/tty"
+	"kitty/tools/tui"
 	"kitty/tools/utils"
 )
 
@@ -255,10 +256,9 @@ func get_password(password string, password_file string, password_env string, us
 	if ans == "" && password_file != "" {
 		if password_file == "-" {
 			if tty.IsTerminal(os.Stdin.Fd()) {
-				var q string
-				q, err = tty.ReadPassword("Password: ")
-				if err == nil {
-					ans = string(q)
+				ans, err = tui.ReadPassword("Password: ", false)
+				if err != nil {
+					return
 				}
 			} else {
 				var q []byte

tools/tui/password.go

@@ -4,6 +4,8 @@ import (
 	"errors"
 	"fmt"
 	"strings"
+
+	"kitty/tools/wcswidth"
 )
 
 type KilledBySignal struct {
@@ -25,9 +27,9 @@ func ReadPassword(prompt string, kill_if_signaled bool) (password string, err er
 	loop.OnInitialize = func(loop *Loop) string { return "\r\n" }
 
 	loop.OnText = func(loop *Loop, text string, from_key_event bool, in_bracketed_paste bool) error {
-		old_width := Wcswidth(password)
+		old_width := wcswidth.Stringwidth(password)
 		password += text
-		new_width := Wcswidth(password)
+		new_width := wcswidth.Stringwidth(password)
 		if new_width > old_width {
 			extra := strings.Repeat("*", new_width-old_width)
 			loop.QueueWriteString(extra)
@@ -40,9 +42,9 @@ func ReadPassword(prompt string, kill_if_signaled bool) (password string, err er
 		if event.MatchesPressOrRepeat("backscape") || event.MatchesPressOrRepeat("delete") {
 			event.Handled = true
 			if len(password) > 0 {
-				old_width := Wcswidth(password)
+				old_width := wcswidth.Stringwidth(password)
 				password = password[:len(password)-1]
-				new_width := Wcswidth(password)
+				new_width := wcswidth.Stringwidth(password)
 				delta := new_width - old_width
 				if delta > 0 {
 					if delta > len(shadow) {

tools/wcswidth/std.go

@@ -1,6 +1,6 @@
-package tui
+package wcswidth
 
-func Wcwidth(code rune) int {
+func Runewidth(code rune) int {
 	switch code {
 	// Flags (26 codepoints) {{{
 	case 0x1f1e6, 0x1f1e7, 0x1f1e8, 0x1f1e9, 0x1f1ea, 0x1f1eb, 0x1f1ec, 0x1f1ed, 0x1f1ee, 0x1f1ef, 0x1f1f0, 0x1f1f1, 0x1f1f2, 0x1f1f3, 0x1f1f4, 0x1f1f5, 0x1f1f6, 0x1f1f7, 0x1f1f8, 0x1f1f9, 0x1f1fa, 0x1f1fb, 0x1f1fc, 0x1f1fd, 0x1f1fe, 0x1f1ff:

tools/wcswidth/wcswidth.go

@@ -1,4 +1,4 @@
-package tui
+package wcswidth
 
 func IsFlagCodepoint(ch rune) bool {
 	return 0x1F1E6 <= ch && ch <= 0x1F1FF
@@ -71,7 +71,7 @@ func (self *WCWidthIterator) Step(ch rune) int {
 			if IsFlagCodepoint(ch) {
 				self.state = flag_pair_started
 			}
-			w := Wcwidth(ch)
+			w := Runewidth(ch)
 			switch w {
 			case -1:
 			case 0:
@@ -102,7 +102,7 @@ func (self *WCWidthIterator) Step(ch rune) int {
 	return ans
 }
 
-func Wcswidth(text string) int {
+func Stringwidth(text string) int {
 	var w WCWidthIterator
 	ans := 0
 	for _, ch := range []rune(text) {

tools/wcswidth/wcswidth_test.go

@@ -1,4 +1,4 @@
-package tui
+package wcswidth
 
 import (
 	"testing"
@@ -7,13 +7,13 @@ import (
 func TestWCSWidth(t *testing.T) {
 
 	wcswidth := func(text string, expected int) {
-		if w := Wcswidth(text); w != expected {
+		if w := Stringwidth(text); w != expected {
 			t.Fatalf("The width for %#v was %d instead of %d", text, w, expected)
 		}
 	}
 	wcwidth := func(text string, widths ...int) {
 		for i, q := range []rune(text) {
-			if w := Wcwidth(q); w != widths[i] {
+			if w := Runewidth(q); w != widths[i] {
 				t.Fatalf("The width of the char: U+%x was %d instead of %d", q, w, widths[i])
 			}
 		}