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0
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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
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3 local ipairs = Luan.ipairs or error()
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0
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4 local Io = require "luan:Io.luan"
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5 local print = Io.print or error()
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3
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6 local new_file = Io.schemes.file or error()
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7
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7 local Math = require "luan:Math.luan"
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8 local min = Math.min or error()
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0
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9 local Swing = require "luan:swing/Swing.luan"
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10 local new_frame = require("luan:swing/Frame.luan").new or error()
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11 local new_label = require("luan:swing/Label.luan").new or error()
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12 local new_text_area = require("luan:swing/Text_area.luan").new or error()
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13 local new_scroll_pane = require("luan:swing/Scroll_pane.luan").new or error()
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14 local new_list = require("luan:swing/List.luan").new or error()
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15 local new_menu_bar = require("luan:swing/Menu_bar.luan").new or error()
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16 local new_menu = require("luan:swing/Menu.luan").new or error()
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17 local new_menu_item = require("luan:swing/Menu_item.luan").new or error()
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2
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18 local new_check_box_menu_item = require("luan:swing/Check_box_menu_item.luan").new or error()
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0
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19 local Logging = require "luan:logging/Logging.luan"
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20 local logger = Logging.logger "editor"
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21
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22
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23 local new_window
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24
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1
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25 local function make_menu_bar(window)
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0
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26 local menu_bar = new_menu_bar()
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4
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27 do
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1
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28 local file_menu = new_menu()
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29 file_menu.text = "File"
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4
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30 do
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1
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31 local new_file = new_menu_item()
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32 new_file.text = "New File"
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33 new_file.accelerator = "meta N"
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5
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34 new_file.add_action_listener(new_window)
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1
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35 file_menu.add(new_file)
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4
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36 end
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37 do
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1
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38 local open = new_menu_item()
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39 open.text = "Open..."
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40 open.accelerator = "meta O"
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5
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41 open.add_action_listener(window.open)
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1
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42 file_menu.add(open)
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4
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43 end
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10
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44 local revert
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4
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45 do
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46 local save = new_menu_item()
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47 save.text = "Save"
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48 save.accelerator = "meta S"
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7
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49 save.add_action_listener(function()
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50 if window.save() then
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51 revert.set_enabled(true)
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52 end
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53 end)
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4
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54 file_menu.add(save)
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55 end
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7
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56 do
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57 revert = new_menu_item()
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58 revert.text = "Revert"
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59 revert.set_enabled(window.has_file)
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60 revert.add_action_listener(window.revert)
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61 file_menu.add(revert)
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62 end
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1
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63 menu_bar.add(file_menu)
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4
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64 end
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65 do
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6
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66 local edit_menu = new_menu()
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67 edit_menu.text = "Edit"
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9
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68 local document = window.text_area.document
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69 local undo, redo
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70 do
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71 undo = new_menu_item()
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72 undo.text = "Undo"
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73 undo.accelerator = "meta Z"
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10
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74 undo.add_action_listener(document.undo)
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9
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75 edit_menu.add(undo)
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76 end
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77 do
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78 redo = new_menu_item()
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79 redo.text = "Redo"
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80 redo.accelerator = "meta shift Z"
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10
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81 redo.add_action_listener(document.redo)
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9
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82 edit_menu.add(redo)
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83 end
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10
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84 local function update_undo_redo()
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85 undo.set_enabled(document.can_undo())
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86 redo.set_enabled(document.can_redo())
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87 end
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88 edit_menu.update_undo_redo = update_undo_redo -- prevent gc
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9
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89 update_undo_redo()
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10
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90 document.add_undo_listener(update_undo_redo)
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9
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91 edit_menu.add_separator()
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6
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92 do
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93 local cut = new_menu_item()
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94 cut.text = "Cut"
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95 cut.accelerator = "meta X"
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96 cut.add_action_listener(window.text_area.cut)
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97 edit_menu.add(cut)
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98 end
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99 do
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100 local copy = new_menu_item()
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101 copy.text = "Copy"
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102 copy.accelerator = "meta C"
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103 copy.add_action_listener(window.text_area.copy)
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104 edit_menu.add(copy)
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105 end
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106 do
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107 local paste = new_menu_item()
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108 paste.text = "Paste"
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109 paste.accelerator = "meta V"
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110 paste.add_action_listener(window.text_area.paste)
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111 edit_menu.add(paste)
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112 end
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113 edit_menu.add_separator()
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114 do
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115 local select_all = new_menu_item()
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116 select_all.text = "Select All"
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117 select_all.accelerator = "meta A"
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118 select_all.add_action_listener(window.text_area.select_all)
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119 edit_menu.add(select_all)
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120 end
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121 menu_bar.add(edit_menu)
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122 end
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123 do
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2
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124 local view_menu = new_menu()
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125 view_menu.text = "View"
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4
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126 do
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2
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127 local word_wrap = new_check_box_menu_item()
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128 word_wrap.text = "Word Wrap"
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129 word_wrap.state = window.text_area.line_wrap
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130 word_wrap.add_action_listener(function()
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131 window.text_area.line_wrap = word_wrap.state
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132 end)
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133 view_menu.add(word_wrap)
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4
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134 end
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2
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135 menu_bar.add(view_menu)
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4
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136 end
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0
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137 return menu_bar
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138 end
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139
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140 local n_windows = 0
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5
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141 local documents = {}
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0
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142
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1
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143 function new_window(file)
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5
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144 local window = {}
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7
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145 window.has_file = file~=nil and file.is_file()
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0
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146 local frame = new_frame()
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5
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147 local title = file and file.canonical().to_string() or "new"
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0
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148 frame.add_close_listener(function()
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149 n_windows = n_windows - 1
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150 if n_windows == 0 then
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151 Luan.exit()
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152 end
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153 end)
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154 local text_area = new_text_area()
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5
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155 window.text_area = text_area
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156 if file ~= nil then
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157 local document = documents[title]
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158 if document == nil then
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159 documents[title] = text_area.document
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160 else
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161 text_area.document = document
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162 end
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163 if file.is_file() then
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164 text_area.text = file.read_text()
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165 end
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1
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166 end
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10
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167 local function set_title()
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168 local s = title
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169 if not text_area.document.is_unedited() then
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170 s = s.." *"
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171 end
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172 frame.title = s
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173 end
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174 set_title()
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175 text_area.set_title = set_title -- no gc
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176 text_area.document.add_undo_listener(set_title)
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0
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177 text_area.rows = 10
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178 text_area.columns = 20
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179 text_area.wrap_style_word = true
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180 text_area.line_wrap = true
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181 text_area.tab_size = 4
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182 text_area.set_font{ family="Monospaced", size=13 }
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7
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183 text_area.caret_position = 0
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0
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184 --print(text_area.line_count)
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185 local scroll_pane = new_scroll_pane(text_area)
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186 local list = new_list()
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187 list.add_element("1")
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188 list.add_element("2")
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189 list.add_element("3")
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190 --scroll_pane.set_row_header_view(list)
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191 frame.add(scroll_pane)
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5
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192 function window.open()
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193 local file_chooser = frame.file_chooser_load()
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194 if file ~= nil then
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195 file_chooser.directory = file.parent()
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196 end
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197 file_chooser.visible = true
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198 local new_file = file_chooser.file
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199 if new_file ~= nil then
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200 new_window(new_file)
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201 end
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202 end
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203 function window.save()
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204 if file == nil then
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205 local file_chooser = frame.file_chooser_save()
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206 file_chooser.visible = true
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207 file = file_chooser.file
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208 if file == nil then
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7
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209 return false
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5
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210 end
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211 title = file.canonical().to_string()
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212 frame.title = title
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213 documents[title] = text_area.document
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214 end
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215 file.write_text(text_area.text)
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10
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216 text_area.document.set_unedited()
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7
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217 return true
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218 end
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219 function window.revert()
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220 local caret_position = text_area.caret_position
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221 local text = file.read_text()
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222 text_area.text = text
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223 text_area.caret_position = min(caret_position,#text)
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10
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224 text_area.document.set_unedited()
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5
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225 end
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1
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226 local menu_bar = make_menu_bar(window)
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0
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227 frame.set_menu_bar(menu_bar)
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228 frame.pack()
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229 frame.visible = true
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230 text_area.request_focus_in_window()
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231 n_windows = n_windows + 1
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232 end
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233
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1
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234 Swing.run(function()
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3
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235 local args = Luan.arg
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236 if #args == 0 then
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237 new_window()
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238 else
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239 for _, arg in ipairs(args) do
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240 local file = new_file(arg)
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241 new_window(file)
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242 end
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243 end
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1
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244 end)
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