Show filename and row count in status bar

editor/draw.go

@@ -105,10 +105,32 @@ func (e *editor) drawPlaceholderRow(y int, ab *buffer) {
 }
 
 func (e *editor) drawStatusBar(ab *buffer) {
+	cols := e.screen.Cols
+	
 	ab.append(terminal.InvertColor)
 
-	str := strings.Repeat(" ", e.screen.Cols)
-	ab.append(str)
+	fileName := "[No Name]"
+	if e.document.filename != "" {
+		fileName = e.document.filename
+	}
+
+	statusLine := fmt.Sprintf("%.20s - %d lines", fileName, e.document.rowCount())
+	length := len(statusLine)
+	if length > cols{
+		statusLine = truncateString(statusLine, cols)
+
+		ab.append(statusLine)
+		ab.append(terminal.ResetColor)
+
+		return
+	}
+
+	ab.append(statusLine)
+
+	// Pad the rest of the status line
+	padding := strings.Repeat(" ", cols - length)
+	ab.append(padding)
+
 
 	ab.append(terminal.ResetColor)
 }