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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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15
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4 local stringify = Luan.stringify or error()
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5 local String = require "luan:String.luan"
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6 local sub_string = String.sub or error()
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7 local replace = String.replace or error()
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8 local starts_with = String.starts_with or error()
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17
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9 local to_number = String.to_number or error()
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0
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10 local Io = require "luan:Io.luan"
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11 local print = Io.print or error()
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3
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12 local new_file = Io.schemes.file or error()
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7
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13 local Math = require "luan:Math.luan"
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14 local min = Math.min or error()
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0
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15 local Swing = require "luan:swing/Swing.luan"
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16 local new_frame = require("luan:swing/Frame.luan").new or error()
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17 local new_label = require("luan:swing/Label.luan").new or error()
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18 local new_text_area = require("luan:swing/Text_area.luan").new or error()
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19 local new_scroll_pane = require("luan:swing/Scroll_pane.luan").new or error()
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13
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20 local new_text_area_line_numbers = require("luan:swing/TextAreaLineNumbers.luan").new or error()
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0
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21 local new_menu_bar = require("luan:swing/Menu_bar.luan").new or error()
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22 local new_menu = require("luan:swing/Menu.luan").new or error()
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23 local new_menu_item = require("luan:swing/Menu_item.luan").new or error()
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2
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24 local new_check_box_menu_item = require("luan:swing/Check_box_menu_item.luan").new or error()
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12
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25 local int_to_color = require("luan:swing/Color.luan").int_to_color or error()
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13
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26 local create_empty_border = require("luan:swing/Border.luan").create_empty_border or error()
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16
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27 local Option_pane = require "luan:swing/Option_pane.luan"
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28 local show_message_dialog = Option_pane.show_message_dialog or error()
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17
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29 local show_input_dialog = Option_pane.show_input_dialog or error()
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0
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30 local Logging = require "luan:logging/Logging.luan"
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31 local logger = Logging.logger "editor"
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32
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33
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34 local new_window
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35
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1
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36 local function make_menu_bar(window)
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0
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37 local menu_bar = new_menu_bar()
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4
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38 do
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1
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39 local file_menu = new_menu()
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40 file_menu.text = "File"
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4
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41 do
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1
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42 local new_file = new_menu_item()
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43 new_file.text = "New File"
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44 new_file.accelerator = "meta N"
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5
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45 new_file.add_action_listener(new_window)
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1
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46 file_menu.add(new_file)
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4
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47 end
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48 do
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1
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49 local open = new_menu_item()
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50 open.text = "Open..."
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51 open.accelerator = "meta O"
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5
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52 open.add_action_listener(window.open)
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1
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53 file_menu.add(open)
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4
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54 end
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10
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55 local revert
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4
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56 do
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57 local save = new_menu_item()
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58 save.text = "Save"
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59 save.accelerator = "meta S"
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7
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60 save.add_action_listener(function()
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61 if window.save() then
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62 revert.set_enabled(true)
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63 end
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64 end)
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4
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65 file_menu.add(save)
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66 end
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7
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67 do
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68 revert = new_menu_item()
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69 revert.text = "Revert"
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70 revert.set_enabled(window.has_file)
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71 revert.add_action_listener(window.revert)
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72 file_menu.add(revert)
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73 end
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1
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74 menu_bar.add(file_menu)
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4
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75 end
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76 do
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6
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77 local edit_menu = new_menu()
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78 edit_menu.text = "Edit"
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9
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79 local document = window.text_area.document
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80 local undo, redo
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81 do
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82 undo = new_menu_item()
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83 undo.text = "Undo"
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84 undo.accelerator = "meta Z"
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10
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85 undo.add_action_listener(document.undo)
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9
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86 edit_menu.add(undo)
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87 end
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88 do
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89 redo = new_menu_item()
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90 redo.text = "Redo"
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91 redo.accelerator = "meta shift Z"
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10
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92 redo.add_action_listener(document.redo)
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9
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93 edit_menu.add(redo)
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94 end
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10
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95 local function update_undo_redo()
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96 undo.set_enabled(document.can_undo())
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97 redo.set_enabled(document.can_redo())
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98 end
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11
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99 edit_menu.dont_gc(update_undo_redo)
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9
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100 update_undo_redo()
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10
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101 document.add_undo_listener(update_undo_redo)
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9
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102 edit_menu.add_separator()
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6
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103 do
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104 local cut = new_menu_item()
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105 cut.text = "Cut"
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106 cut.accelerator = "meta X"
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107 cut.add_action_listener(window.text_area.cut)
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108 edit_menu.add(cut)
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109 end
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110 do
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111 local copy = new_menu_item()
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112 copy.text = "Copy"
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113 copy.accelerator = "meta C"
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114 copy.add_action_listener(window.text_area.copy)
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115 edit_menu.add(copy)
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116 end
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117 do
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118 local paste = new_menu_item()
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119 paste.text = "Paste"
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120 paste.accelerator = "meta V"
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121 paste.add_action_listener(window.text_area.paste)
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122 edit_menu.add(paste)
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123 end
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124 edit_menu.add_separator()
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125 do
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15
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126 local indent = new_menu_item()
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127 indent.text = "Indent"
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128 indent.accelerator = "meta CLOSE_BRACKET"
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129 indent.add_action_listener(window.indent)
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130 edit_menu.add(indent)
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131 end
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132 do
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133 local unindent = new_menu_item()
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134 unindent.text = "Unindent"
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135 unindent.accelerator = "meta OPEN_BRACKET"
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136 unindent.add_action_listener(window.unindent)
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137 edit_menu.add(unindent)
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138 end
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139 edit_menu.add_separator()
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140 do
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6
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141 local select_all = new_menu_item()
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142 select_all.text = "Select All"
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143 select_all.accelerator = "meta A"
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144 select_all.add_action_listener(window.text_area.select_all)
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145 edit_menu.add(select_all)
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146 end
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147 menu_bar.add(edit_menu)
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148 end
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149 do
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2
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150 local view_menu = new_menu()
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151 view_menu.text = "View"
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4
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152 do
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2
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153 local word_wrap = new_check_box_menu_item()
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154 word_wrap.text = "Word Wrap"
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155 word_wrap.state = window.text_area.line_wrap
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156 word_wrap.add_action_listener(function()
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157 window.text_area.line_wrap = word_wrap.state
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158 end)
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159 view_menu.add(word_wrap)
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4
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160 end
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14
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161 do
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162 local show_whitespace = new_check_box_menu_item()
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163 show_whitespace.text = "Show Whitespace"
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164 show_whitespace.add_action_listener(function()
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165 window.text_area.show_whitespace(show_whitespace.state)
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166 end)
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167 view_menu.add(show_whitespace)
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168 end
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16
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169 do
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170 local show_column = new_menu_item()
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171 show_column.text = "Show Cursor Column"
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172 show_column.add_action_listener(function()
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173 show_message_dialog( window.frame, "Cursor Column: "..window.cursor_column() )
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174 end)
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175 view_menu.add(show_column)
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176 end
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17
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177 do
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178 local goto = new_menu_item()
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179 goto.text = "Goto Line"
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180 goto.accelerator = "meta G"
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181 goto.add_action_listener(function()
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182 local input = show_input_dialog( window.frame, "Cursor Column: "..window.cursor_column() )
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183 --logger.info("input "..input)
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184 local line = input and to_number(input)
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185 if line ~= nil then
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186 window.goto(line)
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187 end
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188 end)
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189 view_menu.add(goto)
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190 end
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2
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191 menu_bar.add(view_menu)
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4
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192 end
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0
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193 return menu_bar
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194 end
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195
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196 local n_windows = 0
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5
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197 local documents = {}
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0
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198
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1
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199 function new_window(file)
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5
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200 local window = {}
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7
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201 window.has_file = file~=nil and file.is_file()
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0
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202 local frame = new_frame()
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16
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203 window.frame = frame
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5
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204 local title = file and file.canonical().to_string() or "new"
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0
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205 frame.add_close_listener(function()
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206 n_windows = n_windows - 1
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207 if n_windows == 0 then
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208 Luan.exit()
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209 end
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210 end)
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211 local text_area = new_text_area()
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5
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212 window.text_area = text_area
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213 if file ~= nil then
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214 local document = documents[title]
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215 if document == nil then
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216 documents[title] = text_area.document
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217 else
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218 text_area.document = document
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219 end
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220 if file.is_file() then
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221 text_area.text = file.read_text()
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222 end
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1
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223 end
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10
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224 local function set_title()
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225 local s = title
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226 if not text_area.document.is_unedited() then
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227 s = s.." *"
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228 end
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229 frame.title = s
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230 end
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231 set_title()
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11
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232 text_area.dont_gc(set_title)
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10
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233 text_area.document.add_undo_listener(set_title)
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0
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234 text_area.rows = 10
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235 text_area.columns = 20
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236 text_area.wrap_style_word = true
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237 text_area.line_wrap = true
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238 text_area.tab_size = 4
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239 text_area.set_font{ family="Monospaced", size=13 }
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15
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240 text_area.set_selection(0)
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0
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241 --print(text_area.line_count)
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242 local scroll_pane = new_scroll_pane(text_area)
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13
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243 local line_numbers = new_text_area_line_numbers(text_area)
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244 line_numbers.foreground_color = int_to_color(0x888888)
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245 line_numbers.border = create_empty_border(0,8,0,8)
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246 scroll_pane.set_row_header_view(line_numbers)
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0
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247 frame.add(scroll_pane)
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5
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248 function window.open()
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249 local file_chooser = frame.file_chooser_load()
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250 if file ~= nil then
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251 file_chooser.directory = file.parent()
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252 end
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253 file_chooser.visible = true
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254 local new_file = file_chooser.file
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255 if new_file ~= nil then
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256 new_window(new_file)
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257 end
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258 end
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259 function window.save()
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260 if file == nil then
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261 local file_chooser = frame.file_chooser_save()
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262 file_chooser.visible = true
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263 file = file_chooser.file
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264 if file == nil then
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7
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265 return false
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5
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266 end
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267 title = file.canonical().to_string()
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268 frame.title = title
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269 documents[title] = text_area.document
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270 end
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271 file.write_text(text_area.text)
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10
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272 text_area.document.set_unedited()
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7
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273 return true
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274 end
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275 function window.revert()
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15
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276 local selection = text_area.get_selection()
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7
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277 local text = file.read_text()
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278 text_area.text = text
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15
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279 text_area.set_selection(min(selection,#text+1))
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10
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280 text_area.document.set_unedited()
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5
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281 end
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15
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282 local function selection_lines()
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283 local start_seletion, end_selection = text_area.get_selection()
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284 local end_ = end_selection == start_seletion and end_selection or end_selection - 1
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285 local start_line = text_area.get_line_from_position(start_seletion)
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286 local end_line = text_area.get_line_from_position(end_)
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287 local start_pos = text_area.get_line_start_position(start_line)
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288 local end_pos = text_area.get_line_end_position(end_line)
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289 local text = text_area.text
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290 text = sub_string(text,start_pos,end_pos-2)
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291 return {
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292 text = text
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293 start_pos = start_pos
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294 length = #text
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295 lines = end_line - start_line + 1
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296 start_seletion = start_seletion
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297 end_selection = end_selection
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298 }
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299 end
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300 function window.indent()
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301 local r = selection_lines()
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302 local text = r.text
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303 local start_pos = r.start_pos
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304 text = "\t"..replace(text,"\n","\n\t")
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305 text_area.replace(start_pos,r.length,text)
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306 --logger.info(stringify{text_area.get_selection()})
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307 text_area.set_selection( r.start_seletion+1, r.end_selection+r.lines )
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308 end
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309 function window.unindent()
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310 local r = selection_lines()
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311 local text = r.text
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312 text = "\n"..text
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313 local start_seletion = r.start_seletion
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314 if starts_with(text,"\n\t") then
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315 start_seletion = start_seletion - 1
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316 end
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317 local len1 = #text
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318 text = replace(text,"\n\t","\n")
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319 local len2 = #text
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320 local end_selection = r.end_selection - (len1 - len2)
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321 text = sub_string(text,2)
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322 text_area.replace(r.start_pos,r.length,text)
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323 text_area.set_selection(start_seletion,end_selection)
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324 end
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16
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325 function window.cursor_column()
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326 local cursor_pos = text_area.get_selection()
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327 local line = text_area.get_line_from_position(cursor_pos)
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328 local start_line_pos = text_area.get_line_start_position(line)
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329 return cursor_pos - start_line_pos + 1
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330 end
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17
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331 function window.goto(line)
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332 local pos = text_area.get_line_start_position(line)
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333 text_area.set_selection(pos)
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334 end
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1
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335 local menu_bar = make_menu_bar(window)
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0
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336 frame.set_menu_bar(menu_bar)
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337 frame.pack()
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338 frame.visible = true
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339 text_area.request_focus_in_window()
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340 n_windows = n_windows + 1
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341 end
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342
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1
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343 Swing.run(function()
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3
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344 local args = Luan.arg
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345 if #args == 0 then
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346 new_window()
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347 else
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348 for _, arg in ipairs(args) do
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349 local file = new_file(arg)
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350 new_window(file)
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351 end
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352 end
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1
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353 end)
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