prompt: draw separator line

2 files changed, 33 insertions, 8 deletions

diff --git a/pkg/cli/query.go b/pkg/cli/query.go
index 2c53cfb..add170c 100644
--- a/pkg/cli/query.go
+++ b/pkg/cli/query.go
@@ -186,9 +186,7 @@ func displayChoices(out io.Writer, choices []Choice, selectedIndex int) {
 	}
 }
 
-//AnsiEscapeRx is a regexp that matches full ANSI escape sequences that start
-//with the CSI.
-var AnsiEscapeRx = regexp.MustCompile(`^\x1B\[[\x20-\x3F]*[\x40-\x7E]`)
+var ansiEscapeRx = regexp.MustCompile(`^\x1B\[[\x20-\x3F]*[\x40-\x7E]`)
 
 type buffer struct {
 	Input io.Reader
@@ -206,7 +204,7 @@ func (b *buffer) getNextInput() []byte {
 	}
 
 	//do we have a full ANSI escape sequence?
-	match := AnsiEscapeRx.Find(b.buf[0:b.fill])
+	match := ansiEscapeRx.Find(b.buf[0:b.fill])
 	if match != nil {
 		result := append([]byte(nil), match...)
 		copy(b.buf[0:], b.buf[len(match):])
@@ -237,10 +235,11 @@ type pipeTUI struct {
 	i *Implementation
 }
 
-var ansiColorCodeRx = regexp.MustCompile("\x1B" + `\[[0-9;]*m`)
+//AnsiColorCodeRx is a regexp that matches ANSI escape sequences of the type SGR.
+var AnsiColorCodeRx = regexp.MustCompile("\x1B" + `\[[0-9;]*m`)
 
 func (t *pipeTUI) Print(w io.Writer, msg string) {
-	w.Write([]byte(ansiColorCodeRx.ReplaceAllString(msg, "")))
+	w.Write([]byte(AnsiColorCodeRx.ReplaceAllString(msg, "")))
 }
 
 func (t *pipeTUI) ReadLine(prompt string) (string, error) {
diff --git a/pkg/prompt/main.go b/pkg/prompt/main.go
index ff51f0c..8ff56c9 100644
--- a/pkg/prompt/main.go
+++ b/pkg/prompt/main.go
@@ -19,9 +19,12 @@
 package prompt
 
 import (
+	"fmt"
 	"os"
 	"strings"
 
+	"golang.org/x/crypto/ssh/terminal"
+
 	"github.com/majewsky/gofu/pkg/cli"
 )
 
@@ -32,6 +35,24 @@ func Exec() int {
 		getLoginField(),
 	}
 	line := strings.Join(fields, " ")
+	lineWidth := getPrintableLength(line)
+
+	//add dashes to expand `line` to fill the terminal's width
+	termWidth, _, err := terminal.GetSize(0)
+	if err != nil {
+		termWidth = 80
+	}
+	if termWidth > lineWidth {
+		line += " "
+		lineWidth++
+	}
+	if termWidth > lineWidth {
+		dashes := make([]byte, termWidth-lineWidth)
+		for idx := range dashes {
+			dashes[idx] = '-'
+		}
+		line += string(dashes)
+	}
 
 	os.Stdout.Write([]byte(line + "\n"))
 	return 0
@@ -52,7 +73,7 @@ func handleError(err error) {
 }
 
 func getPrintableLength(text string) int {
-	return len(cli.AnsiEscapeRx.ReplaceAllString(text, ""))
+	return len(cli.AnsiColorCodeRx.ReplaceAllString(text, ""))
 }
 
 //withColor adds ANSI escape sequences to the string to display it with a
@@ -63,5 +84,10 @@ func withColor(color, text string) string {
 	if color == "0" {
 		return text
 	}
-	return "\x1B[" + color + "m" + text + "\x1B[0m"
+	return fmt.Sprintf("\x1B[%sm%s\x1B[0m", color, text)
+}
+
+//withType adds a type annotation with a standardized format to the text.
+func withType(typeStr, text string) string {
+	return fmt.Sprintf("\x1B[37m%s:\x1B[0m%s", typeStr, text)
 }