working on autocomplete improvements

buy.xml

@@ -91,19 +91,33 @@
 							</Layer>
 						</Layers>
 						<Scripts>
+							<OnLoad>
+								this.completor = Aux.completion.completor(this)
+							</OnLoad>
 							<OnTextChanged>
-								Aux.completion.make_suggestions(this)
+								this.completor.suggest()
 							</OnTextChanged>
 							<OnTabPressed>
-								Aux.completion.highlight_next(this)
+								if IsShiftKeyDown() then
+									this.completor.previous()
+								else
+									this.completor.next()
+								end
 							</OnTabPressed>
 							<OnEnterPressed>
-								if Aux.completion.highlighted() then
+								if this.completor.open() then
-									Aux.completion.close(this)
+									this.completor.close()
 								end
 								this:ClearFocus()
 								Aux.buy.SearchButton_onclick()
 							</OnEnterPressed>
+							<OnEscapePressed>
+								if this.completor.open() then
+									this.completor.close()
+								else
+									this:ClearFocus()
+								end
+							</OnEscapePressed>
 						</Scripts>
 					</EditBox>
 					

completion.lua

@@ -2,18 +2,10 @@ Aux.completion = {}
 
 local NUM_MATCHES = 5
 
-local leven, fuzzy, populate_dropdown, toggle_dropdown, suggestions, highlight
+local fuzzy, populate_dropdown, toggle_dropdown, suggestions, update_highlighting
 
 local item_names = {}
 
-local current_suggestions = {}
-local selected_index = 0
-
-local current_input
-
-local programmatically_set_input
-
-
 for item_id=1,30000 do
 	local name = GetItemInfo(item_id)
 	if name then
@@ -78,57 +70,6 @@ function suggestions(input)
 	return Aux.util.map(best, function(match) return match.name end)
 end
 
-function Aux.completion.make_suggestions(input_box)
-	
-	local input = input_box:GetText()
-	if programmatically_set_input == input then
-		programmatically_set_input = nil
-		return
-	end
-	programmatically_set_input = nil
-	
-	current_input = input
-	selected_index = 0
-	update_highlighting()
-	
-	if current_input == '' then
-		current_suggestions = {}
-	else
-		current_suggestions = suggestions(current_input)
-		UIDropDownMenu_Initialize(AuxCompletionDropDown, function() populate_dropdown(input_box, current_suggestions) end)
-	end
-	
-	if DropDownList1:IsVisible() then
-		toggle_dropdown(input_box)
-	end
-	toggle_dropdown(input_box)
-end
-
-function Aux.completion.highlight_next(input_box)
-	if getn(current_suggestions) > 0 then
-		selected_index = selected_index > 0 and math.mod(selected_index + 1, getn(current_suggestions) + 1) or 1
-		update_highlighting()
-		if selected_index == 0 then
-			Aux.completion.set_quietly(input_box, current_input)
-		else	
-			Aux.completion.set_quietly(input_box, current_suggestions[selected_index])
-		end
-	end
-end
-
-function Aux.completion.highlighted()
-	return selected_index ~= 0 
-end
-
-function Aux.completion.close()
-	CloseDropDownMenus(1)
-end
-
-function Aux.completion.set_quietly(edit_box, text)
-	programmatically_set_input = text
-	edit_box:SetText(text)
-end
-
 function populate_dropdown(input_box, suggestions)
 	for _, suggestion in ipairs(suggestions) do
 		UIDropDownMenu_AddButton{
@@ -145,3 +86,77 @@ end
 function toggle_dropdown(input_box)
 	ToggleDropDownMenu(1, nil, AuxCompletionDropDown, input_box, -12, 4)
 end
+
+function Aux.completion.completor()
+	local self = {}
+	
+	local current_suggestions = {}
+	local selected_index = 0
+	local current_input
+	local programmatically_set_input
+	
+	function self.close()
+	CloseDropDownMenus(1)
+	end
+
+	function self.set_quietly(edit_box, text)
+		programmatically_set_input = text
+		edit_box:SetText(text)
+	end
+	
+	function self.highlighted()
+		return selected_index ~= 0 
+	end
+	
+	function self.suggest(input_box)
+		
+		local input = input_box:GetText()
+		if programmatically_set_input == input then
+			programmatically_set_input = nil
+			return
+		end
+		programmatically_set_input = nil
+		
+		current_input = input
+		selected_index = 0
+		update_highlighting()
+		
+		if current_input == '' then
+			current_suggestions = {}
+		else
+			current_suggestions = suggestions(current_input)
+			UIDropDownMenu_Initialize(AuxCompletionDropDown, function() populate_dropdown(input_box, current_suggestions) end)
+		end
+		
+		if DropDownList1:IsVisible() then
+			toggle_dropdown(input_box)
+		end
+		toggle_dropdown(input_box)
+	end
+	
+	function self.next(input_box)
+		if getn(current_suggestions) > 0 then
+			selected_index = selected_index > 0 and math.mod(selected_index + 1, getn(current_suggestions) + 1) or 1
+			update_highlighting()
+			if selected_index == 0 then
+				Aux.completion.set_quietly(input_box, current_input)
+			else	
+				Aux.completion.set_quietly(input_box, current_suggestions[selected_index])
+			end
+		end
+	end
+	
+	function self.previous(input_box)
+		if getn(current_suggestions) > 0 then
+			selected_index = selected_index > 0 and math.mod(selected_index + 1, getn(current_suggestions) + 1) or 1
+			update_highlighting()
+			if selected_index == 0 then
+				Aux.completion.set_quietly(input_box, current_input)
+			else	
+				Aux.completion.set_quietly(input_box, current_suggestions[selected_index])
+			end
+		end
+	end
+	
+	return self
+end