Add auto indent

cmd/micro/util.go

@@ -75,3 +75,16 @@ func Contains(list []string, a string) bool {
 func Insert(str string, pos int, value string) string {
 	return string([]rune(str)[:pos]) + value + string([]rune(str)[pos:])
 }
+
+// GetLeadingWhitespace returns the leading whitespace of the given string
+func GetLeadingWhitespace(str string) string {
+	ws := ""
+	for _, c := range str {
+		if c == ' ' || c == '\t' {
+			ws += string(c)
+		} else {
+			break
+		}
+	}
+	return ws
+}

cmd/micro/view.go

@@ -377,8 +377,17 @@ func (v *View) HandleEvent(event tcell.Event) {
 				v.cursor.DeleteSelection()
 				v.cursor.ResetSelection()
 			}
+
 			v.eh.Insert(v.cursor.Loc(), "\n")
+			ws := GetLeadingWhitespace(v.buf.lines[v.cursor.y])
 			v.cursor.Right()
+
+			if settings.AutoIndent {
+				v.eh.Insert(v.cursor.Loc(), ws)
+				for i := 0; i < len(ws); i++ {
+					v.cursor.Right()
+				}
+			}
 			v.cursor.lastVisualX = v.cursor.GetVisualX()
 		case tcell.KeySpace:
 			// Insert a space

todolist.md

@@ -14,14 +14,14 @@
 
 - [ ] Persistent undo/redo (saved between open and closing micro)
 
-- [ ] Auto indent
-
 - [ ] More options
     - [ ] Tabs to spaces
     - [ ] Wrap lines
 
 ### Done
 
+- [x] Auto indent
+
 - [x] Line numbers
 
 - [x] Search and replace