about summary refs log tree commit diff stats
path: root/source_file.lua
blob: dbb6f95525984493119c30315975188fc79e0937 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
-- primitives for saving to file and loading from file

function file_exists(filename)
  local infile = App.open_for_reading(App.save_dir..filename)
  if not infile then
    infile = App.open_for_reading(App.source_dir..filename)
  end
  if infile then
    infile:close()
    return true
  else
    return false
  end
end

-- the source editor supports only files in the save dir backed by the source dir
function load_from_disk(State)
  local infile = App.open_for_reading(App.save_dir..State.filename)
  if not infile then
    infile = App.open_for_reading(App.source_dir..State.filename)
  end
  State.lines = load_from_file(infile)
  if infile then infile:close() end
end

function load_from_file(infile)
  local result = {}
  if infile then
    local infile_next_line = infile:lines()  -- works with both Lua files and LÖVE Files (https://www.love2d.org/wiki/File)
    while true do
      local line = infile_next_line()
      if line == nil then break end
      if line == '```lines' then  -- inflexible with whitespace since these files are always autogenerated
        table.insert(result, load_drawing(infile_next_line))
      else
        table.insert(result, {mode='text', data=line})
      end
    end
  end
  if #result == 0 then
    table.insert(result, {mode='text', data=''})
  end
  return result
end

function save_to_disk(State)
  local outfile = App.open_for_writing(App.save_dir..State.filename)
  if not outfile then
    error('failed to write to "'..State.filename..'"')
  end
  for _,line in ipairs(State.lines) do
    if line.mode == 'drawing' then
      store_drawing(outfile, line)
    else
      outfile:write(line.data)
      outfile:write('\n')
    end
  end
  outfile:close()
end

function load_drawing(infile_next_line)
  local drawing = {mode='drawing', h=256/2, points={}, shapes={}, pending={}}
  while true do
    local line = infile_next_line()
    assert(line)
    if line == '```' then break end
    local shape = json.decode(line)
    if shape.mode == 'freehand' then
      -- no changes needed
    elseif shape.mode == 'line' or shape.mode == 'manhattan' then
      local name = shape.p1.name
      shape.p1 = Drawing.find_or_insert_point(drawing.points, shape.p1.x, shape.p1.y, --[[large width to minimize overlap]] 1600)
      drawing.points[shape.p1].name = name
      name = shape.p2.name
      shape.p2 = Drawing.find_or_insert_point(drawing.points, shape.p2.x, shape.p2.y, --[[large width to minimize overlap]] 1600)
      drawing.points[shape.p2].name = name
    elseif shape.mode == 'polygon' or shape.mode == 'rectangle' or shape.mode == 'square' then
      for i,p in ipairs(shape.vertices) do
        local name = p.name
        shape.vertices[i] = Drawing.find_or_insert_point(drawing.points, p.x,p.y, --[[large width to minimize overlap]] 1600)
        drawing.points[shape.vertices[i]].name = name
      end
    elseif shape.mode == 'circle' or shape.mode == 'arc' then
      local name = shape.center.name
      shape.center = Drawing.find_or_insert_point(drawing.points, shape.center.x,shape.center.y, --[[large width to minimize overlap]] 1600)
      drawing.points[shape.center].name = name
    elseif shape.mode == 'deleted' then
      -- ignore
    else
      print(shape.mode)
      assert(false)
    end
    table.insert(drawing.shapes, shape)
  end
  return drawing
end

function store_drawing(outfile, drawing)
  outfile:write('```lines\n')
  for _,shape in ipairs(drawing.shapes) do
    if shape.mode == 'freehand' then
      outfile:write(json.encode(shape))
      outfile:write('\n')
    elseif shape.mode == 'line' or shape.mode == 'manhattan' then
      local line = json.encode({mode=shape.mode, p1=drawing.points[shape.p1], p2=drawing.points[shape.p2]})
      outfile:write(line)
      outfile:write('\n')
    elseif shape.mode == 'polygon' or shape.mode == 'rectangle' or shape.mode == 'square' then
      local obj = {mode=shape.mode, vertices={}}
      for _,p in ipairs(shape.vertices) do
        table.insert(obj.vertices, drawing.points[p])
      end
      local line = json.encode(obj)
      outfile:write(line)
      outfile:write('\n')
    elseif shape.mode == 'circle' then
      outfile:write(json.encode({mode=shape.mode, center=drawing.points[shape.center], radius=shape.radius}))
      outfile:write('\n')
    elseif shape.mode == 'arc' then
      outfile:write(json.encode({mode=shape.mode, center=drawing.points[shape.center], radius=shape.radius, start_angle=shape.start_angle, end_angle=shape.end_angle}))
      outfile:write('\n')
    elseif shape.mode == 'deleted' then
      -- ignore
    else
      print(shape.mode)
      assert(false)
    end
  end
  outfile:write('```\n')
end

-- for tests
function load_array(a)
  local result = {}
  local next_line = ipairs(a)
  local i,line,drawing = 0, ''
  while true do
    i,line = next_line(a, i)
    if i == nil then break end
--?     print(line)
    if line == '```lines' then  -- inflexible with whitespace since these files are always autogenerated
--?       print('inserting drawing')
      i, drawing = load_drawing_from_array(next_line, a, i)
--?       print('i now', i)
      table.insert(result, drawing)
    else
--?       print('inserting text')
      local line_info = {mode='text'}
      line_info.data = line
      table.insert(result, line_info)
    end
  end
  if #result == 0 then
    table.insert(result, {mode='text', data=''})
  end
  return result
end

function load_drawing_from_array(iter, a, i)
  local drawing = {mode='drawing', h=256/2, points={}, shapes={}, pending={}}
  local line
  while true do
    i, line = iter(a, i)
    assert(i)
--?     print(i)
    if line == '```' then break end
    local shape = json.decode(line)
    if shape.mode == 'freehand' then
      -- no changes needed
    elseif shape.mode == 'line' or shape.mode == 'manhattan' then
      local name = shape.p1.name
      shape.p1 = Drawing.find_or_insert_point(drawing.points, shape.p1.x, shape.p1.y, --[[large width to minimize overlap]] 1600)
      drawing.points[shape.p1].name = name
      name = shape.p2.name
      shape.p2 = Drawing.find_or_insert_point(drawing.points, shape.p2.x, shape.p2.y, --[[large width to minimize overlap]] 1600)
      drawing.points[shape.p2].name = name
    elseif shape.mode == 'polygon' or shape.mode == 'rectangle' or shape.mode == 'square' then
      for i,p in ipairs(shape.vertices) do
        local name = p.name
        shape.vertices[i] = Drawing.find_or_insert_point(drawing.points, p.x,p.y, --[[large width to minimize overlap]] 1600)
        drawing.points[shape.vertices[i]].name = name
      end
    elseif shape.mode == 'circle' or shape.mode == 'arc' then
      local name = shape.center.name
      shape.center = Drawing.find_or_insert_point(drawing.points, shape.center.x,shape.center.y, --[[large width to minimize overlap]] 1600)
      drawing.points[shape.center].name = name
    elseif shape.mode == 'deleted' then
      -- ignore
    else
      print(shape.mode)
      assert(false)
    end
    table.insert(drawing.shapes, shape)
  end
  return i, drawing
end

function is_absolute_path(path)
  local os_path_separator = package.config:sub(1,1)
  if os_path_separator == '/' then
    -- POSIX systems permit backslashes in filenames
    return path:sub(1,1) == '/'
  elseif os_path_separator == '\\' then
    if path:sub(2,2) == ':' then return true end  -- DOS drive letter followed by volume separator
    local f = path:sub(1,1)
    return f == '/' or f == '\\'
  else
    error('What OS is this? LÖVE reports that the path separator is "'..os_path_separator..'"')
  end
end

function is_relative_path(path)
  return not is_absolute_path(path)
end

function dirname(path)
  local os_path_separator = package.config:sub(1,1)
  if os_path_separator == '/' then
    -- POSIX systems permit backslashes in filenames
    return path:match('.*/') or './'
  elseif os_path_separator == '\\' then
    return path:match('.*[/\\]') or './'
  else
    error('What OS is this? LÖVE reports that the path separator is "'..os_path_separator..'"')
  end
end

function test_dirname()
  check_eq(dirname('a/b'), 'a/', 'F - test_dirname')
  check_eq(dirname('x'), './', 'F - test_dirname/current')
end

function basename(path)
  local os_path_separator = package.config:sub(1,1)
  if os_path_separator == '/' then
    -- POSIX systems permit backslashes in filenames
    return string.gsub(path, ".*/(.*)", "%1")
  elseif os_path_separator == '\\' then
    return string.gsub(path, ".*[/\\](.*)", "%1")
  else
    error('What OS is this? LÖVE reports that the path separator is "'..os_path_separator..'"')
  end
end

function empty(h)
  for _,_ in pairs(h) do
    return false
  end
  return true
end