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