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comparison src/luan_editor/window.luan @ 37:b7ff52d45b9a default tip

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copy from luan
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 21 Apr 2025 13:07:29 -0600
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36:0a8865de3d53 37:b7ff52d45b9a
1 local Luan = require "luan:Luan.luan"
2 local error = Luan.error
3 local stringify = Luan.stringify or error()
4 local Math = require "luan:Math.luan"
5 local min = Math.min or error()
6 local String = require "luan:String.luan"
7 local sub_string = String.sub or error()
8 local replace = String.replace or error()
9 local starts_with = String.starts_with or error()
10 local Io = require "luan:Io.luan"
11 local new_text_area = require("luan:swing/Text_area.luan").new or error()
12 local new_frame = require("luan:swing/Frame.luan").new or error()
13 local new_panel = require("luan:swing/Component.luan").new_panel or error()
14 local Layout = require "luan:swing/Layout.luan"
15 local new_mig_layout = Layout.new_mig_layout or error()
16 local new_scroll_pane = require("luan:swing/Scroll_pane.luan").new or error()
17 local new_text_area_line_numbers = require("luan:swing/Text_area_line_numbers.luan").new or error()
18 local int_to_color = require("luan:swing/Color.luan").int_to_color or error()
19 local Border = require "luan:swing/Border.luan"
20 local create_empty_border = Border.create_empty_border or error()
21 local new_label = require("luan:swing/Label.luan").new or error()
22 local make_find_panel = require "classpath:luan_editor/find.luan"
23 local add_menu_bar = require "classpath:luan_editor/menu.luan"
24 local Swing = require "luan:swing/Swing.luan"
25 local File_chooser = require "luan:swing/File_chooser.luan"
26 local choose_file = File_chooser.awt_choose_file or error()
27 local Logging = require "luan:logging/Logging.luan"
28 local logger = Logging.logger "editor/window"
29
30
31 local n_windows = 0
32 local documents = {}
33
34 local function bool(val,default)
35 if val ~= nil then
36 return val
37 else
38 return default
39 end
40 end
41
42 local config_file = Io.uri("file:"..Swing.home_dir.."/.luan_editor")
43 local config = {}
44 if config_file.exists() then
45 try
46 config = Luan.parse(config_file.read_text())
47 catch e
48 logger.error(e)
49 end
50 end
51 config.size = config.size or { width=700, height=700 }
52 config.line_wrap = bool( config.line_wrap, true )
53 config.whitespace_visible = bool( config.whitespace_visible, false )
54 config.tab_size = config.tab_size or 4
55
56 local function save_config()
57 config_file.write_text( stringify(config).."\n" )
58 end
59
60 local function new_window(file)
61 local window = {}
62 window.has_file = file~=nil and file.is_file()
63 local text_area = new_text_area{
64 wrap_style_word = true
65 line_wrap = config.line_wrap
66 whitespace_visible = config.whitespace_visible
67 tab_size = config.tab_size
68 font = { family="Monospaced", size=13 }
69 }
70 window.text_area = text_area
71 local title = file and file.canonical().to_string() or "new"
72 if file ~= nil then
73 local document = documents[title]
74 if document == nil then
75 documents[title] = text_area.document
76 else
77 text_area.document = document
78 end
79 if file.is_file() then
80 text_area.text = file.read_text()
81 text_area.document.clear_unedited()
82 end
83 end
84 text_area.set_selection(0)
85 local status_bar = new_label{
86 constraints = "span,growx"
87 text = " "
88 border = create_empty_border(2,16,4,16)
89 }
90 window.status_bar = status_bar
91 local find_panel = make_find_panel(window)
92 local frame = new_frame{
93 preferred_size = config.size
94 content_pane = new_panel{
95 layout = new_mig_layout("insets 0,wrap,fill,hidemode 3","","[][grow 0]")
96 children = {
97 new_scroll_pane{
98 constraints = "grow"
99 view = text_area
100 row_header_view = new_text_area_line_numbers{
101 text_area = text_area
102 foreground_color = int_to_color(0x888888)
103 border = create_empty_border(0,8,0,8)
104 }
105 }
106 find_panel
107 status_bar
108 }
109 }
110 }
111 window.frame = frame
112 frame.add_close_listener(function()
113 n_windows = n_windows - 1
114 if n_windows == 0 then
115 Luan.exit()
116 end
117 end)
118 frame.add_resize_stopped_listener( 200, function()
119 --logger.info(stringify(frame.size))
120 config.size = frame.size
121 save_config()
122 end)
123 frame.add_move_stopped_listener( 200, function()
124 --logger.info(stringify(frame.location))
125 config.location = frame.location
126 save_config()
127 end)
128 local function set_title()
129 local s = title
130 if not text_area.document.is_unedited() then
131 s = s.." *"
132 end
133 frame.title = s
134 end
135 set_title()
136 window.set_title = set_title -- dont gc
137 text_area.document.add_undo_listener(set_title)
138 window.new = new_window
139 function window.open()
140 local new_file = choose_file{
141 action = "load"
142 parent = frame
143 directory = file and file.parent()
144 }
145 if new_file ~= nil then
146 new_window(new_file)
147 end
148 end
149 function window.save()
150 if file == nil then
151 file = choose_file{
152 action = "save"
153 parent = frame
154 }
155 if file == nil then
156 return false
157 end
158 title = file.canonical().to_string()
159 frame.title = title
160 documents[title] = text_area.document
161 end
162 file.write_text(text_area.text)
163 text_area.document.set_unedited()
164 return true
165 end
166 function window.revert()
167 local selection = text_area.get_selection()
168 local text = file.read_text()
169 text_area.text = text
170 text_area.set_selection(min(selection,#text+1))
171 text_area.document.set_unedited()
172 status_bar.text = "Reverted"
173 end
174 local function selection_lines()
175 local start_seletion, end_selection = text_area.get_selection()
176 local end_ = end_selection == start_seletion and end_selection or end_selection - 1
177 local start_line = text_area.get_line_from_position(start_seletion)
178 local end_line = text_area.get_line_from_position(end_)
179 local start_pos = text_area.get_line_start_position(start_line)
180 local end_pos = text_area.get_line_end_position(end_line)
181 local text = text_area.text
182 text = sub_string(text,start_pos,end_pos-2)
183 return {
184 text = text
185 start_pos = start_pos
186 length = #text
187 lines = end_line - start_line + 1
188 start_seletion = start_seletion
189 end_selection = end_selection
190 }
191 end
192 function window.indent()
193 local r = selection_lines()
194 local text = r.text
195 local start_pos = r.start_pos
196 text = "\t"..replace(text,"\n","\n\t")
197 text_area.replace(start_pos,r.length,text)
198 --logger.info(stringify{text_area.get_selection()})
199 text_area.set_selection( r.start_seletion+1, r.end_selection+r.lines )
200 end
201 function window.unindent()
202 local r = selection_lines()
203 local text = r.text
204 text = "\n"..text
205 local start_seletion = r.start_seletion
206 if starts_with(text,"\n\t") then
207 start_seletion = start_seletion - 1
208 end
209 local len1 = #text
210 text = replace(text,"\n\t","\n")
211 local len2 = #text
212 local end_selection = r.end_selection - (len1 - len2)
213 text = sub_string(text,2)
214 text_area.replace(r.start_pos,r.length,text)
215 text_area.set_selection(start_seletion,end_selection)
216 end
217 function window.cursor_column()
218 local cursor_pos = text_area.get_selection()
219 local line = text_area.get_line_from_position(cursor_pos)
220 local start_line_pos = text_area.get_line_start_position(line)
221 return cursor_pos - start_line_pos + 1
222 end
223 function window.goto(line)
224 local pos = text_area.get_line_start_position(line)
225 text_area.set_selection(pos)
226 end
227 function window.set_line_wrap(line_wrap)
228 text_area.line_wrap = line_wrap
229 config.line_wrap = line_wrap
230 save_config()
231 end
232 function window.set_whitespace_visible(whitespace_visible)
233 text_area.whitespace_visible = whitespace_visible
234 config.whitespace_visible = whitespace_visible
235 save_config()
236 end
237 function window.set_tab_size(tab_size)
238 text_area.tab_size = tab_size
239 config.tab_size = tab_size
240 save_config()
241 end
242 add_menu_bar(window)
243 frame.pack()
244 if config.location ~= nil then
245 frame.location = config.location
246 end
247 frame.visible = true
248 text_area.request_focus_in_window()
249 n_windows = n_windows + 1
250 end
251
252 return new_window