make undothresthold a setting

cmd/micro/micro.go

@@ -17,10 +17,14 @@ import (
 )
 
 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 is not a double click
-	undoThreshold        = 500 // If two events are less than n milliseconds apart, undo both of them
+	// How many lines up to look to do syntax highlighting
+	synLinesUp = 75
+	// How many lines down to look to do syntax highlighting
+	synLinesDown = 75
+	// How many milliseconds to wait before a second click is not a double click
+	doubleClickThreshold = 400
+	// If two events are less than n milliseconds apart, undo both of them
+	undoThreshold = int(settings["undothreshold"].(float64))
 )
 
 var (

cmd/micro/settings.go

@@ -72,17 +72,18 @@ func GetOption(name string) interface{} {
 // DefaultSettings returns the default settings for micro
 func DefaultSettings() map[string]interface{} {
 	return map[string]interface{}{
-		"colorscheme":  "default",
-		"tabsize":      float64(4),
-		"indentchar":   " ",
-		"ignorecase":   false,
-		"autoindent":   true,
-		"syntax":       true,
-		"tabstospaces": false,
-		"ruler":        true,
-		"statusline":   true,
-		"scrollmargin": float64(3),
-		"scrollspeed":  float64(2),
+		"autoindent":    true,
+		"colorscheme":   "default",
+		"ignorecase":    false,
+		"indentchar":    " ",
+		"ruler":         true,
+		"scrollspeed":   float64(2),
+		"scrollmargin":  float64(3),
+		"statusline":    true,
+		"syntax":        true,
+		"tabsize":       float64(4),
+		"tabstospaces":  false,
+		"undothreshold": float64(500),
 	}
 }
 

runtime/help/help.md

@@ -203,6 +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`