Open file buffers through command arguments

src/main.go

@@ -2,14 +2,36 @@ package main
 
 import (
 	"log"
+	"os"
 )
 
 func main() {
-	window, err := CreateWindow(nil)
+	window, err := CreateWindow()
 	if err != nil {
 		log.Fatalf("Failed to create window: %v", err)
 	}
 
+	var initialBuffer *Buffer = nil
+
+	if len(os.Args) > 0 {
+		for _, file := range os.Args[1:] {
+			b, err := CreateFileBuffer(file)
+			if err != nil {
+				PrintMessage(window, "Could not open file: "+file)
+				continue
+			}
+			Buffers[b.Id] = b
+			if initialBuffer == nil {
+				initialBuffer = b
+			}
+		}
+	}
+
+	if initialBuffer != nil {
+		delete(Buffers, window.textArea.CurrentBuffer.Id)
+		window.textArea.CurrentBuffer = initialBuffer
+	}
+
 	for window.screen != nil {
 		window.Draw()
 	}

src/window.go

@@ -19,23 +19,21 @@ type TextArea struct {
 	CurrentBuffer *Buffer
 }
 
-func CreateWindow(initialBuffer *Buffer) (*Window, error) {
+func CreateWindow() (*Window, error) {
 	window := Window{
 		ShowTopMenu:   true,
 		ShowLineIndex: true,
 
 		textArea: TextArea{
 			CursorPos:     0,
-			CurrentBuffer: initialBuffer,
+			CurrentBuffer: nil,
 		},
 
 		screen: nil,
 	}
 
 	// Create empty buffer if nil
-	if window.textArea.CurrentBuffer == nil {
-		window.textArea.CurrentBuffer = CreateBuffer("New File")
-	}
+	window.textArea.CurrentBuffer = CreateBuffer("New File")
 
 	// Create tcell screen
 	screen, err := tcell.NewScreen()