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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 ipairs = Luan.ipairs or error()
4 local range = Luan.range or error()
5 local String = require "luan:String.luan"
6 local regex = String.regex or error()
7 local regex_quote = String.regex_quote or error()
8 local regex_quote_replacement = String.regex_quote_replacement or error()
9 local repeated = String.repeated or error()
10 local new_text_field = require("luan:swing/Text_field.luan").new or error()
11 local new_check_box = require("luan:swing/Check_box.luan").new or error()
12 local new_label = require("luan:swing/Label.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_button = require("luan:swing/Button.luan").new or error()
17 local Swing = require "luan:swing/Swing.luan"
18 local browse = Swing.browse or error()
19
20
21 local function get_matches(text,s)
22 local r = regex(s)
23 local matches = {}
24 local i = 1
25 local n = #text
26 while i <= n do
27 local j1, j2 = r.find(text,i)
28 if j1 == nil then
29 break
30 end
31 j2 = j2 + 1
32 if j1 == j2 then
33 i = j2 + 1
34 else
35 matches[#matches+1] = { start=j1, end_=j2 }
36 i = j2
37 end
38 end
39 return matches
40 end
41
42 local function make_find_panel(window)
43 local text_area = window.text_area
44 local status_bar = window.status_bar
45 local find_field, replace_field, regex_check_box
46 local function find_match(event)
47 --logger.info("action "..event.action)
48 local s = find_field.text
49 if #s == 0 then
50 status_bar.text = " "
51 return
52 end
53 if not regex_check_box.is_selected then
54 s = regex_quote(s)
55 end
56 local matches
57 try
58 matches = get_matches( text_area.text, s )
59 catch e
60 status_bar.text = "Regex error: "..e.get_message()
61 return
62 end
63 text_area.set_hightlights(matches)
64 local n_matches = #matches
65 if n_matches == 0 then
66 status_bar.text = "0 matches"
67 return
68 end
69 local action = event.action
70 if action == "next" then
71 local _, pos = text_area.get_selection()
72 for i, match in ipairs(matches) do
73 if match.start >= pos then
74 text_area.set_selection( match.start, match.end_ )
75 status_bar.text = i.." of "..n_matches.." matches"
76 return
77 end
78 end
79 local match = matches[1]
80 text_area.set_selection( match.start, match.end_ )
81 status_bar.text = "1 of "..n_matches.." matches; wrapped past end"
82 elseif action == "previous" then
83 local pos = text_area.get_selection()
84 for i in range(n_matches,1,-1) do
85 local match = matches[i]
86 if match.end_ <= pos then
87 text_area.set_selection( match.start, match.end_ )
88 status_bar.text = i.." of "..n_matches.." matches"
89 return
90 end
91 end
92 local match = matches[n_matches]
93 text_area.set_selection( match.start, match.end_ )
94 status_bar.text = n_matches.." of "..n_matches.." matches; wrapped past end"
95 else
96 error(action)
97 end
98 end
99 local function replace_match(event)
100 local find = find_field.text
101 if #find == 0 then
102 status_bar.text = " "
103 return
104 end
105 local replace = replace_field.text
106 if not regex_check_box.is_selected then
107 find = regex_quote(find)
108 replace = regex_quote_replacement(replace)
109 end
110 local r
111 try
112 r = regex(find)
113 catch e
114 status_bar.text = "Regex error: "..e.get_message()
115 return
116 end
117 local new, n
118 local action = event.action
119 if action == "replace" then
120 local selection = text_area.selected_text
121 new, n = r.gsub(selection,replace)
122 if n > 0 then
123 text_area.selected_text = new
124 end
125 elseif action == "replace_all" then
126 local text = text_area.text
127 new, n = r.gsub(text,replace)
128 if n > 0 then
129 text_area.text = new
130 end
131 else
132 error(action)
133 end
134 status_bar.text = n.." replacements"
135 end
136 find_field = new_text_field{
137 constraints = "growx"
138 whitespace_visible = true
139 action = "next"
140 action_listener = find_match
141 }
142 replace_field = new_text_field{
143 constraints = "growx"
144 whitespace_visible = true
145 action = "replace"
146 action_listener = replace_match
147 }
148 regex_check_box = new_check_box{
149 text = "Use Regex"
150 }
151 local find_panel = new_panel{
152 constraints = "growy 0,growx"
153 layout = new_mig_layout("insets 8 16 0 16","[][grow][grow 0]")
154 visible = false
155 children = {
156 new_label{
157 constraints = "right"
158 text = "Find:"
159 }
160 find_field
161 new_button{
162 constraints = "grow"
163 text = "Find Next"
164 action = "next"
165 action_listener = find_match
166 }
167 new_button{
168 constraints = "grow,wrap"
169 text = "Find Previous"
170 action = "previous"
171 action_listener = find_match
172 }
173 new_label{
174 constraints = "right"
175 text = "Replace:"
176 }
177 replace_field
178 new_button{
179 constraints = "grow"
180 text = "Replace"
181 tool_tip_text = "Replace matches in selected text"
182 action = "replace"
183 action_listener = replace_match
184 }
185 new_button{
186 constraints = "grow,wrap"
187 text = "Replace All"
188 action = "replace_all"
189 action_listener = replace_match
190 }
191 new_panel{
192 constraints = "span,wrap"
193 layout = new_mig_layout("insets 0,gap 16px")
194 children = {
195 regex_check_box
196 new_button{
197 text = "Learn About Regular Expressions"
198 action_listener = function(_)
199 browse("https://www.reactionary.software/learn.html#regex")
200 end
201 }
202 }
203 }
204 }
205 }
206 function window.show_find_panel(visible)
207 find_panel.visible = visible
208 if visible then
209 find_field.request_focus_in_window()
210 else
211 text_area.clear_hightlights()
212 end
213 end
214 function window.find_case_insensitive(_)
215 find_panel.visible = true
216 window.find_menu_item.is_selected = true
217 regex_check_box.is_selected = true
218 find_field.text = "(?i)\Q\E"
219 find_field.set_selection(7)
220 find_field.request_focus_in_window()
221 status_bar.text = [[Put search text between "\Q" and "\E"]]
222 end
223 function window.tabs_to_spaces(_)
224 find_panel.visible = true
225 window.find_menu_item.is_selected = true
226 regex_check_box.is_selected = true
227 find_field.text = [[(?m)^(\t*)\t]]
228 local spaces = repeated( " ", text_area.tab_size )
229 replace_field.text = "$1"..spaces
230 status_bar.text = [[Do "Replace All" until 0 replacements]]
231 end
232 function window.spaces_to_tabs(_)
233 find_panel.visible = true
234 window.find_menu_item.is_selected = true
235 regex_check_box.is_selected = true
236 local tab_size = text_area.tab_size
237 find_field.text = `%>(?m)^(( {<%=tab_size%>})*) {<%=tab_size%>}<%`
238 replace_field.text = "$1\t"
239 status_bar.text = [[Do "Replace All" until 0 replacements]]
240 end
241 return find_panel
242 end
243
244 return make_find_panel