Hitting the shortcut multiple times will now swap the search direction.

#8

README.md

@@ -13,6 +13,8 @@ Fill a void in your Sublime Text multiple selection capabilities! This plugin al
 	- `-/regex/`: backwards regex.
 	- `-{character count}`: select backwards a certain number of characters (`{-count}` works too).
 
+- <kbd>ctrl/alt</kbd> + <kbd>shift</kbd> + <kbd>s</kbd> a second time: reverses the search direction.
+
 - <kbd>ctrl/alt</kbd> + <kbd>shift</kbd> + <kbd>r</kbd>: reverse all selections (so if the insertion point is at the end of the selection, it is moved to the beginning, and vice versa).
 
 On Windows and Linux the default shortcuts use <kbd>alt</kbd>.  On OSX <kbd>ctrl</kbd> is used.

select-until.py

@@ -15,6 +15,9 @@ def clean_up(view):
 	view.erase_regions("select-until")
 	view.erase_regions("select-until-originals")
 
+	SelectUntilCommand.input_panel = None
+	SelectUntilCommand.first_opened = True
+
 def on_done(view, extend):
 	if extend:
 		newSels = view.get_regions("select-until-extended")
@@ -59,6 +62,22 @@ def find_matching_point(view, sel, selector):
 			return region.begin()
 	return -1
 
+def negate_selector(selector):
+	if selector == "": return selector
+
+	result = rSelector.search(selector)
+
+	if result is None: return True, "-[" + selector + "]"
+
+	groups = result.groups()
+	makeReverse = (groups[0] != "-")
+	num, chars, regex = groups[1:]
+
+	negateChar = "-" if makeReverse else ""
+	if num is not None: return makeReverse, negateChar + "{" + num + "}"
+	elif chars is not None: return makeReverse, negateChar + "[" + chars + "]"
+	elif regex is not None: return makeReverse, negateChar + "/" + regex + "/"
+
 def on_change(view, oriSels, selector, extend):
 	SelectUntilCommand.temp = selector
 	extendedSels = []
@@ -92,6 +111,8 @@ def on_cancel(view, oriSels):
 class SelectUntilCommand(sublime_plugin.TextCommand):
 	temp = ""
 	prevSelector = ""
+	input_panel = None
+	first_opened = True
 
 	def run(self, edit, extend):
 		view = self.view
@@ -104,8 +125,27 @@ def run(self, edit, extend):
 			lambda selector: on_change(view, oriSels, selector, extend),
 			lambda : on_cancel(view, oriSels)
 		)
-		v.sel().clear()
-		v.sel().add(Region(0, v.size()))
+
+		# view.window().show_input_panel returns None when input_panel is already shown in subl v2
+		if v is not None:
+			v.sel().clear()
+			v.sel().add(Region(0, v.size()))
+			SelectUntilCommand.input_panel = v
+
+		input_panel = SelectUntilCommand.input_panel
+		if input_panel and not SelectUntilCommand.first_opened:
+			fullRegion = Region(0, input_panel.size())
+
+			isReverse, negSelector = negate_selector(input_panel.substr(fullRegion))
+			highlight = Region(1 + (1 if isReverse else 0), len(negSelector) - 1)
+
+			edit = input_panel.begin_edit()
+			input_panel.replace(edit, fullRegion, negSelector)
+			input_panel.sel().clear()
+			input_panel.sel().add(highlight)
+			input_panel.end_edit(edit)
+
+		SelectUntilCommand.first_opened = False;
 
 class ReverseSelectCommand(sublime_plugin.TextCommand):