--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/luan_editor/Window.luan	Wed May 28 16:02:27 2025 -0600
@@ -0,0 +1,388 @@
+local Luan = require "luan:Luan.luan"
+local error = Luan.error
+local stringify = Luan.stringify or error()
+local ipairs = Luan.ipairs or error()
+local Parsers = require "luan:Parsers.luan"
+local json_string = Parsers.json_string or error()
+local json_parse = Parsers.json_parse or error()
+local Math = require "luan:Math.luan"
+local min = Math.min or error()
+local String = require "luan:String.luan"
+local sub_string = String.sub or error()
+local replace = String.replace or error()
+local starts_with = String.starts_with or error()
+local Io = require "luan:Io.luan"
+local new_file = Io.schemes.file or error()
+local new_text_area = require("luan:swing/Text_area.luan").new or error()
+local new_frame = require("luan:swing/Frame.luan").new or error()
+local new_dialog = require("luan:swing/Dialog.luan").new or error()
+local new_panel = require("luan:swing/Component.luan").new_panel or error()
+local new_list = require("luan:swing/List.luan").new or error()
+local Layout = require "luan:swing/Layout.luan"
+local new_mig_layout = Layout.new_mig_layout or error()
+local new_scroll_pane = require("luan:swing/Scroll_pane.luan").new or error()
+local new_text_area_line_numbers = require("luan:swing/Text_area_line_numbers.luan").new or error()
+local int_to_color = require("luan:swing/Color.luan").int_to_color or error()
+local Border = require "luan:swing/Border.luan"
+local create_empty_border = Border.create_empty_border or error()
+local new_label = require("luan:swing/Label.luan").new or error()
+local make_find_panel = require "classpath:luan_editor/find.luan"
+local Swing = require "luan:swing/Swing.luan"
+local run_later = Swing.run_later or error()
+local File_chooser = require "luan:swing/File_chooser.luan"
+local choose_file = File_chooser.awt_choose_file or error()
+local Option_pane = require "luan:swing/Option_pane.luan"
+local show_message_dialog = Option_pane.show_message_dialog or error()
+local Clipboard = require "luan:swing/Clipboard.luan"
+local Java = require "classpath:luan_editor/Java.luan"
+local Logging = require "luan:logging/Logging.luan"
+local logger = Logging.logger "editor/Window"
+
+
+local Window = {}
+
+local n_windows = 0
+local documents = {}
+
+local function bool(val,default)
+	if val ~= nil then
+		return val
+	else
+		return default
+	end
+end
+
+local config_file = Io.uri("file:"..Java.home_dir.."/.luan_editor/config.json")
+local config = {}
+if config_file.exists() then
+	try
+		config = json_parse(config_file.read_text())
+	catch e
+		logger.error(e)
+	end
+end
+config.size = config.size or { width=700, height=700 }
+config.line_wrap = bool( config.line_wrap, true )
+config.whitespace_visible = bool( config.whitespace_visible, false )
+config.tab_size = config.tab_size or 4
+config.list_window = config.list_window or {}
+config.list_window.size = config.list_window.size or { width=200, height=400 }
+
+local function save_config()
+	config_file.write_text( json_string(config).."\n" )
+end
+
+local list_view = new_list{
+	--layout = new_mig_layout("insets 0,wrap,fill")
+	--layout = new_mig_layout("wrap","[grow]")
+	horizontal_alignment = "right"
+	hover_background = int_to_color(0xEEEEEE)
+}
+local list_scroll_pane = new_scroll_pane{
+	view = list_view
+}
+local list_window = new_dialog{
+	size = config.list_window.size
+	content_pane = list_scroll_pane
+	focusable_window_state = false
+}
+list_window.add_resize_stopped_listener( 200, function()
+	--logger.info(stringify(list_window.size))
+	config.list_window.size = list_window.size
+	save_config()
+end)
+list_window.add_move_stopped_listener( 200, function()
+	--logger.info(stringify(list_window.location))
+	config.list_window.location = list_window.location
+	save_config()
+end)
+function Window.show_list_window()
+	local location = config.list_window.location
+	if location ~= nil then
+		list_window.location = location
+	end
+	list_window.visible = true
+	list_scroll_pane.scroll_to_right()
+end
+
+local function add_list_window_item(item)
+	list_view.add_element(item)
+	list_scroll_pane.scroll_to_right()
+end
+local function remove_list_window_item(item)
+	list_view.remove_element(item) --or error()
+end
+list_view.add_list_selection_listener( function(item)
+	if item ~= nil then
+		item.window.text_area.request_focus()
+	end
+end )
+
+local black = int_to_color(0x000000)
+local dark_blue = int_to_color(0x0000C0)
+local grey = int_to_color(0x888888)
+
+local function new_window(file,document)
+	local window = {}
+	if file == nil or not file.exists() then
+		window.has_file = false
+	elseif file.is_file() then
+		window.has_file = true
+	else
+		show_message_dialog(nil,"Not a file")
+		if n_windows == 0 then
+			Luan.exit()
+		else
+			return
+		end
+	end
+	window.has_file = file~=nil and file.exists()
+	local text_area = new_text_area{
+		wrap_style_word = true
+		line_wrap = config.line_wrap
+		whitespace_visible = config.whitespace_visible
+		tab_size = config.tab_size
+		font = { family="Monospaced", size=13 }
+	}
+	window.text_area = text_area
+	local title = file and file.canonical().to_string() or "new"
+	if document ~= nil then
+		text_area.document = document
+	elseif file ~= nil then
+		local document = documents[title]
+		if document ~= nil then
+			text_area.document = document
+		else
+			documents[title] = text_area.document
+			if file.exists() then
+				text_area.text = file.read_text()
+				text_area.document.clear_unedited()
+			end
+		end
+	end
+	text_area.set_selection(0)
+	local list_window_item = {
+		window = window
+	}
+	add_list_window_item(list_window_item)
+	local status_bar = new_label{
+		constraints = "span,growx"
+		text = " "
+		border = create_empty_border(2,16,4,16)
+	}
+	window.status_bar = status_bar
+	local find_panel = make_find_panel(window)
+	local frame = new_frame{
+		preferred_size = config.size
+		content_pane = new_panel{
+			layout = new_mig_layout("insets 0,wrap,fill,hidemode 3","","[][grow 0]")
+			children = {
+				new_scroll_pane{
+					constraints = "grow"
+					view = text_area
+					row_header_view = new_text_area_line_numbers{
+						text_area = text_area
+						foreground_color = grey
+						border = create_empty_border(0,8,0,8)
+					}
+				}
+				find_panel
+				status_bar
+			}
+		}
+	}
+	window.frame = frame
+	frame.add_close_listener(function()
+		n_windows = n_windows - 1
+		if n_windows == 0 then
+			Luan.exit()
+		end
+		remove_list_window_item(list_window_item)
+	end)
+	frame.add_window_focus_listener(function()
+		list_view.selected_value = list_window_item
+	end)
+	frame.add_resize_stopped_listener( 200, function()
+		--logger.info(stringify(frame.size))
+		config.size = frame.size
+		save_config()
+	end)
+	frame.add_move_stopped_listener( 200, function()
+		--logger.info(stringify(frame.location))
+		config.location = frame.location
+		save_config()
+	end)
+	local function undo_listener()
+		local is_unedited = text_area.document.is_unedited()
+		if window.is_unedited == is_unedited then
+			return
+		end
+		window.is_unedited = is_unedited
+		local s = title
+		if not is_unedited then
+			s = s.." *"
+		end
+		frame.title = s
+		list_window_item.text = title
+		list_window_item.foreground_color = is_unedited and black or dark_blue
+		list_view.repaint(list_window_item)
+	end
+	undo_listener()
+	--window.undo_listener = undo_listener  -- dont gc
+	text_area.document.add_undo_listener(undo_listener)
+	window.new = new_window
+	function window.title()
+		return title
+	end
+	function window.open()
+		local new_file = choose_file{
+			action = "load"
+			parent = frame
+			directory = file and file.parent()
+		}
+		if new_file ~= nil then
+			new_window(new_file)
+		end
+	end
+	function window.save()
+		if file == nil then
+			file = choose_file{
+				action = "save"
+				parent = frame
+			}
+			if file == nil then
+				return false
+			end
+			title = file.canonical().to_string()
+			documents[title] = text_area.document
+			window.is_unedited = nil
+			undo_listener()
+		end
+		try
+			file.write_text(text_area.text)
+		catch e
+			show_message_dialog( frame, e.get_message() )
+			return false
+		end
+		text_area.document.set_unedited()
+		return true
+	end
+	function window.revert()
+		local selection = text_area.get_selection()
+		local text = file.read_text()
+		text_area.text = text
+		text_area.set_selection(min(selection,#text+1))
+		text_area.document.set_unedited()
+		status_bar.text = "Reverted"
+	end
+	local function selection_lines()
+		local start_seletion, end_selection = text_area.get_selection()
+		local end_ = end_selection == start_seletion and end_selection or end_selection - 1
+		local start_line = text_area.get_line_from_position(start_seletion)
+		local end_line = text_area.get_line_from_position(end_)
+		local start_pos = text_area.get_line_start_position(start_line)
+		local end_pos = text_area.get_line_end_position(end_line)
+		local text = text_area.text
+		text = sub_string(text,start_pos,end_pos-2)
+		return {
+			text = text
+			start_pos = start_pos
+			length = #text
+			lines = end_line - start_line + 1
+			start_seletion = start_seletion
+			end_selection = end_selection
+		}
+	end
+	function window.indent()
+		local r = selection_lines()
+		local text = r.text
+		local start_pos = r.start_pos
+		text = "\t"..replace(text,"\n","\n\t")
+		text_area.replace(start_pos,r.length,text)
+		--logger.info(stringify{text_area.get_selection()})
+		text_area.set_selection( r.start_seletion+1, r.end_selection+r.lines )
+	end
+	function window.unindent()
+		local r = selection_lines()
+		local text = r.text
+		text = "\n"..text
+		local start_seletion = r.start_seletion
+		if starts_with(text,"\n\t") then
+			start_seletion = start_seletion - 1
+		end
+		local len1 = #text
+		text = replace(text,"\n\t","\n")
+		local len2 = #text
+		local end_selection = r.end_selection - (len1 - len2)
+		text = sub_string(text,2)
+		text_area.replace(r.start_pos,r.length,text)
+		text_area.set_selection(start_seletion,end_selection)
+	end
+	function window.cursor_column()
+		local cursor_pos = text_area.get_selection()
+		local line = text_area.get_line_from_position(cursor_pos)
+		local start_line_pos = text_area.get_line_start_position(line)
+		return cursor_pos - start_line_pos + 1
+	end
+	function window.goto(line)
+		local pos = text_area.get_line_start_position(line)
+		text_area.set_selection(pos)
+	end
+	function window.set_line_wrap(line_wrap)
+		text_area.line_wrap = line_wrap
+		config.line_wrap = line_wrap
+		save_config()
+	end
+	function window.set_whitespace_visible(whitespace_visible)
+		text_area.whitespace_visible = whitespace_visible
+		config.whitespace_visible = whitespace_visible
+		save_config()
+	end
+	function window.set_tab_size(tab_size)
+		text_area.tab_size = tab_size
+		config.tab_size = tab_size
+		save_config()
+	end
+	function window.duplicate()
+		local new = new_window(file,text_area.document)
+		new.text_area.set_selection( text_area.get_selection() )
+	end
+	function window.paste_files()
+		--logger.info("paste_files "..stringify(Clipboard.get_files()))
+		local files = Clipboard.get_files()
+		if files == nil then
+			return false
+		end
+		for _, file in ipairs(files) do
+			new_window(file)
+		end
+		return true
+	end
+	local add_menu_bar = require "classpath:luan_editor/menu.luan"
+	add_menu_bar(window)
+	frame.pack()
+	local location = config.location
+	if location ~= nil then
+		frame.location = location
+	end
+	frame.visible = true
+	text_area.request_focus_in_window()
+	n_windows = n_windows + 1
+	return window
+end
+Window.new_window = new_window
+
+function Window.open_windows(file_paths)
+	list_window.to_front()
+	for _, file_path in ipairs(file_paths) do
+		local file = new_file(file_path)
+		new_window(file)
+	end
+	if #file_paths == 0 then
+		local window = list_view.selected_value.window
+		window.frame.to_front()
+		window.text_area.request_focus_in_window()
+	end
+end
+
+return Window