Move ANSI stuff into its own file

ansi.go

@@ -0,0 +1,64 @@
+package tea
+
+import "fmt"
+
+// Escape sequence
+const esc = "\033["
+
+// Fullscreen switches to the altscreen and clears the terminal. The former
+// view can be restored with ExitFullscreen().
+func Fullscreen() {
+	fmt.Print(esc + "?1049h" + esc + "H")
+}
+
+// ExitFullscreen exits the altscreen and returns the former terminal view
+func ExitFullscreen() {
+	fmt.Print(esc + "?1049l")
+}
+
+// ClearScreen clears the visible portion of the terminal. Effectively, it
+// fills the terminal with blank spaces.
+func ClearScreen() {
+	fmt.Printf(esc + "2J" + esc + "3J" + esc + "1;1H")
+}
+
+// Invert inverts the foreground and background colors of a given string
+func Invert(s string) string {
+	return esc + "7m" + s + esc + "0m"
+}
+
+// Hide the cursor
+func hideCursor() {
+	fmt.Printf(esc + "?25l")
+}
+
+// Show the cursor
+func showCursor() {
+	fmt.Printf(esc + "?25h")
+}
+
+// Move the cursor down a given number of lines and place it at the beginning
+// of the line
+func cursorNextLine(n int) {
+	fmt.Printf(esc+"%dE", n)
+}
+
+// Move the cursor up a given number of lines and place it at the beginning of
+// the line
+func cursorPrevLine(n int) {
+	fmt.Printf(esc+"%dF", n)
+}
+
+// Clear the current line
+func clearLine() {
+	fmt.Printf(esc + "2K")
+}
+
+// Clear a given number of lines
+func clearLines(n int) {
+	clearLine()
+	for i := 0; i < n; i++ {
+		cursorPrevLine(1)
+		clearLine()
+	}
+}

tea.go

@@ -2,7 +2,6 @@ package tea
 
 import (
 	"errors"
-	"fmt"
 	"io"
 	"log"
 	"log/syslog"
@@ -11,9 +10,6 @@ import (
 	"github.com/pkg/term"
 )
 
-// Escape sequence
-const esc = "\033["
-
 // The number of lines we last rendered
 var linesRendered = 0
 
@@ -176,64 +172,6 @@ func (p *Program) render(model Model) {
 	linesRendered = strings.Count(view, "\r\n")
 }
 
-// Hide the cursor
-func hideCursor() {
-	fmt.Printf(esc + "?25l")
-}
-
-// Show the cursor
-func showCursor() {
-	fmt.Printf(esc + "?25h")
-}
-
-// Move the cursor down a given number of lines and place it at the beginning
-// of the line
-func cursorNextLine(n int) {
-	fmt.Printf(esc+"%dE", n)
-}
-
-// Move the cursor up a given number of lines and place it at the beginning of
-// the line
-func cursorPrevLine(n int) {
-	fmt.Printf(esc+"%dF", n)
-}
-
-// Clear the current line
-func clearLine() {
-	fmt.Printf(esc + "2K")
-}
-
-// Clear a given number of lines
-func clearLines(n int) {
-	clearLine()
-	for i := 0; i < n; i++ {
-		cursorPrevLine(1)
-		clearLine()
-	}
-}
-
-// Fullscreen switches to the altscreen and clears the terminal. The former
-// view can be restored with ExitFullscreen().
-func Fullscreen() {
-	fmt.Print(esc + "?1049h" + esc + "H")
-}
-
-// ExitFullscreen exits the altscreen and returns the former terminal view
-func ExitFullscreen() {
-	fmt.Print(esc + "?1049l")
-}
-
-// ClearScreen clears the visible portion of the terminal. Effectively, it
-// fills the terminal with blank spaces.
-func ClearScreen() {
-	fmt.Printf(esc + "2J" + esc + "3J" + esc + "1;1H")
-}
-
-// Invert inverts the foreground and background colors of a given string
-func Invert(s string) string {
-	return esc + "7m" + s + esc + "0m"
-}
-
 // UseSysLog logs to the system log. This becomes helpful when debugging since
 // we can't easily print to the terminal since our TUI is occupying it!
 //