Add "smartpaste" option; fixes #1156

cmd/micro/settings.go

@@ -231,6 +231,7 @@ func DefaultGlobalSettings() map[string]interface{} {
 		"scrollmargin":   float64(3),
 		"scrollspeed":    float64(2),
 		"softwrap":       false,
+		"smartpaste":     true,
 		"splitbottom":    true,
 		"splitright":     true,
 		"statusline":     true,
@@ -271,6 +272,7 @@ func DefaultLocalSettings() map[string]interface{} {
 		"scrollmargin":   float64(3),
 		"scrollspeed":    float64(2),
 		"softwrap":       false,
+		"smartpaste":     true,
 		"splitbottom":    true,
 		"splitright":     true,
 		"statusline":     true,

cmd/micro/view.go

@@ -198,16 +198,18 @@ func (v *View) ToggleTabbar() {
 }
 
 func (v *View) paste(clip string) {
-	leadingWS := ""
-	if v.Cursor.X > 0 {
-		leadingWS = GetLeadingWhitespace(v.Buf.Line(v.Cursor.Y))
+	if v.Buf.Settings["smartpaste"].(bool) {
+		if v.Cursor.X > 0 && GetLeadingWhitespace(strings.TrimLeft(clip, "\r\n")) == "" {
+			leadingWS := GetLeadingWhitespace(v.Buf.Line(v.Cursor.Y))
+			clip = strings.Replace(clip, "\n", "\n"+leadingWS, -1)
+		}
 	}
 
 	if v.Cursor.HasSelection() {
 		v.Cursor.DeleteSelection()
 		v.Cursor.ResetSelection()
 	}
-	clip = strings.Replace(clip, "\n", "\n"+leadingWS, -1)
+	
 	v.Buf.Insert(v.Cursor.Loc, clip)
 	// v.Cursor.Loc = v.Cursor.Loc.Move(Count(clip), v.Buf)
 	v.freshClip = false

runtime/help/options.md

@@ -164,6 +164,12 @@ Here are the options that you can set:
 
 	default value: `2`
 
+* `smartpaste`: should micro add leading whitespace when pasting multiple lines?
+   This will attempt to preserve the current indentation level when pasting an
+   unindented block.
+
+	default value: `true`
+
 * `softwrap`: should micro wrap lines that are too long to fit on the screen.
 
 	default value: `false`