Remove undo options, make stackundo default behavior

cmd/micro/eventhandler.go

@@ -115,13 +115,10 @@ func (eh *EventHandler) Undo() {
 
 		te = t.(*TextEvent)
 
-		undoThreshold := int64(settings["undothreshold"].(float64))
 		if startTime-(te.time.UnixNano()/int64(time.Millisecond)) > undoThreshold {
 			return
 		} else {
-			if settings["stackundo"] == true {
-				startTime = t.(*TextEvent).time.UnixNano() / int64(time.Millisecond)
-			}
+			startTime = t.(*TextEvent).time.UnixNano() / int64(time.Millisecond)
 		}
 
 		eh.UndoOneEvent()
@@ -171,7 +168,6 @@ func (eh *EventHandler) Redo() {
 
 		te = t.(*TextEvent)
 
-		undoThreshold := int64(settings["undothreshold"].(float64))
 		if (te.time.UnixNano()/int64(time.Millisecond))-startTime > undoThreshold {
 			return
 		}

cmd/micro/micro.go

@@ -20,6 +20,7 @@ const (
 	synLinesUp           = 75  // How many lines up to look to do syntax highlighting
 	synLinesDown         = 75  // How many lines down to look to do syntax highlighting
 	doubleClickThreshold = 400 // How many milliseconds to wait before a second click i not a double click
+	undoThreshold        = 500 // If two events are less than n milliseconds apart, undo both of them
 )
 
 var (

cmd/micro/settings.go

@@ -72,19 +72,17 @@ func GetOption(name string) interface{} {
 // DefaultSettings returns the default settings for micro
 func DefaultSettings() map[string]interface{} {
 	return map[string]interface{}{
-		"autoindent":    true,
-		"colorscheme":   "default",
-		"ignorecase":    false,
-		"indentchar":    " ",
-		"ruler":         true,
-		"scrollspeed":   float64(2),
-		"scrollmargin":  float64(3),
-		"stackundo":     false,
-		"statusline":    true,
-		"syntax":        true,
-		"tabsize":       float64(4),
-		"tabstospaces":  false,
-		"undothreshold": float64(500),
+		"autoindent":   true,
+		"colorscheme":  "default",
+		"ignorecase":   false,
+		"indentchar":   " ",
+		"ruler":        true,
+		"scrollspeed":  float64(2),
+		"scrollmargin": float64(3),
+		"statusline":   true,
+		"syntax":       true,
+		"tabsize":      float64(4),
+		"tabstospaces": false,
 	}
 }
 

runtime/help/help.md

@@ -203,18 +203,10 @@ Here are the options that you can set:
 
 	default value: `on`
 
-* `undothreshold`: maximum time in milliseconds events can be apart to be counted as a single undo
-
-	default value: `500`
-
 * `statusline`: display the status line at the bottom of the screen
 
 	default value: `on`
 
-* `stackundo`: reset undothreshold timer to zero if an action is taken before the timer runs out
-
-	default value: `off`
-
 * `scrollmargin`: amount of lines you would like to see above and below the cursor
 
 	default value: `3`