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