api.lua

   1 -- signs_lib api, backported from street_signs
   2
   3 local S = signs_lib.gettext
   4
   5 signs_lib.lbm_restore_nodes = {}
   6 signs_lib.old_fenceposts = {}
   7 signs_lib.old_fenceposts_replacement_signs = {}
   8 signs_lib.old_fenceposts_with_signs = {}
   9 signs_lib.allowed_poles = {}
  10
  11 -- Settings used for a standard wood or steel wall sign
  12 signs_lib.standard_lines = 6
  13 signs_lib.standard_hscale = 1
  14 signs_lib.standard_vscale = 1
  15 signs_lib.standard_lspace = 1
  16 signs_lib.standard_fsize = 15
  17 signs_lib.standard_xoffs = 4
  18 signs_lib.standard_yoffs = 0
  19 signs_lib.standard_cpl = 35
  20
  21 signs_lib.standard_wood_groups = table.copy(minetest.registered_items["default:sign_wall_wood"].groups)
  22 signs_lib.standard_wood_groups.sign = 1
  23 signs_lib.standard_wood_groups.attached_node = nil
  24
  25 signs_lib.standard_steel_groups = table.copy(minetest.registered_items["default:sign_wall_steel"].groups)
  26 signs_lib.standard_steel_groups.sign = 1
  27 signs_lib.standard_steel_groups.attached_node = nil
  28
  29 signs_lib.standard_wood_sign_sounds  = table.copy(minetest.registered_items["default:sign_wall_wood"].sounds)
  30 signs_lib.standard_steel_sign_sounds = table.copy(minetest.registered_items["default:sign_wall_steel"].sounds)
  31
  32 signs_lib.default_text_scale = {x=10, y=10}
  33
  34 signs_lib.standard_yaw = {
  35         0,
  36         math.pi / -2,
  37         math.pi,
  38         math.pi / 2,
  39 }
  40
  41 signs_lib.wallmounted_yaw = {
  42         nil,
  43         nil,
  44         math.pi / -2,
  45         math.pi / 2,
  46         0,
  47         math.pi,
  48 }
  49
  50 signs_lib.fdir_to_back = {
  51         {  0, -1 },
  52         { -1,  0 },
  53         {  0,  1 },
  54         {  1,  0 },
  55 }
  56
  57 signs_lib.wall_fdir_to_back = {
  58         nil,
  59         nil,
  60         {  0,  1 },
  61         {  0, -1 },
  62         { -1,  0 },
  63         {  1,  0 },
  64 }
  65
  66 signs_lib.fdir_flip_to_back = {
  67         [0] = {  0,  2 },
  68         [1] = {  2,  0 },
  69         [2] = {  0, -2 },
  70         [3] = { -2,  0 }
  71 }
  72
  73 signs_lib.wall_fdir_flip_to_back = {
  74         [2] = {  2,  0 },
  75         [3] = { -2,  0 },
  76         [4] = {  0,  2 },
  77         [5] = {  0, -2 },
  78 }
  79
  80 signs_lib.fdir_to_back_left = {
  81         [0] = { -1,  1 },
  82         [1] = {  1,  1 },
  83         [2] = {  1, -1 },
  84         [3] = { -1, -1 }
  85 }
  86
  87 signs_lib.wall_fdir_to_back_left = {
  88         [2] = {  1,  1 },
  89         [3] = { -1, -1 },
  90         [4] = { -1,  1 },
  91         [5] = {  1, -1 }
  92 }
  93
  94 signs_lib.rotate_walldir = {
  95         [0] = 4,
  96         [1] = 0,
  97         [2] = 5,
  98         [3] = 1,
  99         [4] = 2,
 100         [5] = 3
 101 }
 102
 103 signs_lib.rotate_walldir_simple = {
 104         [0] = 4,
 105         [1] = 4,
 106         [2] = 5,
 107         [3] = 4,
 108         [4] = 2,
 109         [5] = 3
 110 }
 111
 112 signs_lib.rotate_facedir = {
 113         [0] = 1,
 114         [1] = 2,
 115         [2] = 3,
 116         [3] = 4,
 117         [4] = 6,
 118         [5] = 6,
 119         [6] = 0
 120 }
 121
 122 signs_lib.rotate_facedir_simple = {
 123         [0] = 1,
 124         [1] = 2,
 125         [2] = 3,
 126         [3] = 0,
 127         [4] = 0,
 128         [5] = 0
 129 }
 130
 131 signs_lib.flip_facedir = {
 132         [0] = 2,
 133         [1] = 3,
 134         [2] = 0,
 135         [3] = 1,
 136         [4] = 6,
 137         [5] = 4,
 138         [6] = 4
 139 }
 140
 141 signs_lib.flip_walldir = {
 142         [0] = 1,
 143         [1] = 0,
 144         [2] = 3,
 145         [3] = 2,
 146         [4] = 5,
 147         [5] = 4
 148 }
 149
 150 local htj_north = {
 151         [1] = true,
 152         [3] = true,
 153         [9] = true,
 154         [11] = true,
 155         [21] = true,
 156         [23] = true
 157 }
 158
 159 local htj_east = {
 160         [0] = true,
 161         [2] = true,
 162         [16] = true,
 163         [18] = true,
 164         [20] = true,
 165         [22] = true
 166 }
 167
 168 local htj_south = {
 169         [1] = true,
 170         [3] = true,
 171         [5] = true,
 172         [7] = true,
 173         [21] = true,
 174         [23] = true
 175 }
 176
 177 local htj_west = {
 178         [0] = true,
 179         [2] = true,
 180         [12] = true,
 181         [14] = true,
 182         [20] = true,
 183         [22] = true
 184 }
 185
 186 local vtj_north = {
 187         [8] = true,
 188         [10] = true,
 189         [13] = true,
 190         [15] = true,
 191         [17] = true,
 192         [19] = true
 193 }
 194
 195 local vtj_east = {
 196         [4] = true,
 197         [6] = true,
 198         [8] = true,
 199         [10] = true,
 200         [17] = true,
 201         [19] = true
 202 }
 203
 204 local vtj_south = {
 205         [4] = true,
 206         [6] = true,
 207         [13] = true,
 208         [15] = true,
 209         [17] = true,
 210         [10] = true
 211 }
 212
 213 local vtj_west = {
 214         [4] = true,
 215         [6] = true,
 216         [8] = true,
 217         [10] = true,
 218         [13] = true,
 219         [15] = true
 220 }
 221
 222 -- Initialize character texture cache
 223 local ctexcache = {}
 224
 225 -- entity handling
 226
 227 minetest.register_entity("signs_lib:text", {
 228         collisionbox = { 0, 0, 0, 0, 0, 0 },
 229         visual = "mesh",
 230         mesh = "signs_lib_standard_wall_sign_entity.obj",
 231         textures = {},
 232         static_save = false,
 233         backface_culling = false
 234 })
 235
 236 function signs_lib.delete_objects(pos)
 237         local objects = minetest.get_objects_inside_radius(pos, 0.5)
 238         for _, v in ipairs(objects) do
 239                 v:remove()
 240         end
 241 end
 242
 243 function signs_lib.spawn_entity(pos, texture)
 244         local node = minetest.get_node(pos)
 245         local def = minetest.registered_items[node.name]
 246         if not def or not def.entity_info then return end
 247
 248         local text_scale = (node and node.text_scale) or signs_lib.default_text_scale
 249         local objects = minetest.get_objects_inside_radius(pos, 0.5)
 250         local obj
 251
 252         if #objects > 0 then
 253                 obj = objects[1]
 254         else
 255                 obj = minetest.add_entity(pos, "signs_lib:text")
 256         end
 257
 258         local yaw = def.entity_info.yaw[node.param2 + 1]
 259         local pitch = 0
 260
 261         if not string.find(node.name, "onpole") and not string.find(node.name, "hanging") then
 262                 local rot90 = math.pi/2
 263
 264                 if def.paramtype2 == "wallmounted" then
 265                         if node.param2 == 1 then -- on floor
 266                                 pitch = -rot90
 267                                 yaw = 0
 268                         elseif node.param2 == 0 then -- on ceiling
 269                                 pitch = rot90
 270                                 yaw = math.pi
 271                         end
 272                 elseif def.paramtype2 == "facedir" then
 273                         if node.param2 == 4 then
 274                                 pitch = -rot90
 275                                 yaw = 0
 276                         elseif node.param2 == 6 then
 277                                 pitch = rot90
 278                                 yaw = math.pi
 279                         end
 280                 end
 281         end
 282
 283         if yaw then
 284                 obj:set_rotation({x = pitch, y = yaw, z=0})
 285
 286                 if not texture then
 287                         obj:set_properties({
 288                                 mesh = def.entity_info.mesh,
 289                                 visual_size = text_scale,
 290                         })
 291                 else
 292                         obj:set_properties({
 293                                 mesh = def.entity_info.mesh,
 294                                 visual_size = text_scale,
 295                                 textures={texture},
 296                         })
 297                 end
 298         end
 299 end
 300
 301 -- rotation
 302
 303 function signs_lib.handle_rotation(pos, node, user, mode)
 304         if not signs_lib.can_modify(pos, user)
 305           or mode ~= screwdriver.ROTATE_FACE then
 306                 return false
 307         end
 308         local newparam2
 309         local tpos = pos
 310         local def = minetest.registered_items[node.name]
 311
 312         if string.match(node.name, "_onpole") then
 313                 if not string.match(node.name, "_horiz") then
 314                         newparam2 = signs_lib.rotate_walldir_simple[node.param2] or 4
 315                         local t = signs_lib.wall_fdir_to_back_left
 316
 317                         if def.paramtype2 ~= "wallmounted" then
 318                                 newparam2 = signs_lib.rotate_facedir_simple[node.param2] or 0
 319                                 t  = signs_lib.fdir_to_back_left
 320                         end
 321
 322                         tpos = {
 323                                 x = pos.x + t[node.param2][1],
 324                                 y = pos.y,
 325                                 z = pos.z + t[node.param2][2]
 326                         }
 327                 else
 328                         -- flip the sign to the other side of the horizontal pole
 329                         newparam2 = signs_lib.flip_walldir[node.param2] or 4
 330                         local t = signs_lib.wall_fdir_flip_to_back
 331
 332                         if def.paramtype2 ~= "wallmounted" then
 333                                 newparam2 = signs_lib.flip_facedir[node.param2] or 0
 334                                 t  = signs_lib.fdir_flip_to_back
 335                         end
 336
 337                         tpos = {
 338                                 x = pos.x + t[node.param2][1],
 339                                 y = pos.y,
 340                                 z = pos.z + t[node.param2][2]
 341                         }
 342                 end
 343                 local node2 = minetest.get_node(tpos)
 344                 local def2 = minetest.registered_items[node2.name]
 345                 if not def2 or not def2.buildable_to then return true end -- undefined, or not buildable_to.
 346
 347                 minetest.set_node(tpos, {name = node.name, param2 = newparam2})
 348                 minetest.get_meta(tpos):from_table(minetest.get_meta(pos):to_table())
 349                 minetest.remove_node(pos)
 350                 signs_lib.delete_objects(pos)
 351         elseif string.match(node.name, "_hanging") or string.match(node.name, "yard") then
 352                 minetest.swap_node(tpos, { name = node.name, param2 = signs_lib.rotate_facedir_simple[node.param2] or 0 })
 353         elseif minetest.registered_items[node.name].paramtype2 == "wallmounted" then
 354                 minetest.swap_node(tpos, { name = node.name, param2 = signs_lib.rotate_walldir[node.param2] or 0 })
 355         else
 356                 minetest.swap_node(tpos, { name = node.name, param2 = signs_lib.rotate_facedir[node.param2] or 0 })
 357         end
 358
 359         signs_lib.delete_objects(tpos)
 360         signs_lib.update_sign(tpos)
 361         return true
 362 end
 363
 364 -- infinite stacks
 365
 366 if not minetest.settings:get_bool("creative_mode") then
 367         signs_lib.expect_infinite_stacks = false
 368 else
 369         signs_lib.expect_infinite_stacks = true
 370 end
 371
 372 -- CONSTANTS
 373
 374 -- Path to the textures.
 375 local TP = signs_lib.path .. "/textures"
 376 -- Font file formatter
 377 local CHAR_FILE = "%s_%02x.png"
 378 -- Fonts path
 379 local CHAR_PATH = TP .. "/" .. CHAR_FILE
 380
 381 -- Lots of overkill here. KISS advocates, go away, shoo! ;) -- kaeza
 382
 383 local PNG_HDR = string.char(0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A)
 384
 385 -- check if a file does exist
 386 -- to avoid reopening file after checking again
 387 -- pass TRUE as second argument
 388 local function file_exists(name, return_handle, mode)
 389         mode = mode or "r";
 390         local f = io.open(name, mode)
 391         if f ~= nil then
 392                 if (return_handle) then
 393                         return f
 394                 end
 395                 io.close(f)
 396                 return true
 397         else
 398                 return false
 399         end
 400 end
 401
 402 -- Read the image size from a PNG file.
 403 -- Returns image_w, image_h.
 404 -- Only the LSB is read from each field!
 405 function signs_lib.read_image_size(filename)
 406         local f = file_exists(filename, true, "rb")
 407         -- file might not exist (don't crash the game)
 408         if (not f) then
 409                 return 0, 0
 410         end
 411         f:seek("set", 0x0)
 412         local hdr = f:read(string.len(PNG_HDR))
 413         if hdr ~= PNG_HDR then
 414                 f:close()
 415                 return
 416         end
 417         f:seek("set", 0x13)
 418         local ws = f:read(1)
 419         f:seek("set", 0x17)
 420         local hs = f:read(1)
 421         f:close()
 422         return ws:byte(), hs:byte()
 423 end
 424
 425 -- 4 rows, max 80 chars per, plus a bit of fudge to
 426 -- avoid excess trimming (e.g. due to color codes)
 427
 428 local MAX_INPUT_CHARS = 400
 429
 430 -- helper functions to trim sign text input/output
 431
 432 local function trim_input(text)
 433         return text:sub(1, math.min(MAX_INPUT_CHARS, text:len()))
 434 end
 435
 436 local function build_char_db(font_size)
 437
 438         local cw = {}
 439
 440         -- To calculate average char width.
 441         local total_width = 0
 442         local char_count = 0
 443
 444         for c = 32, 255 do
 445                 local w, h = signs_lib.read_image_size(CHAR_PATH:format("signs_lib_font_"..font_size.."px", c))
 446                 if w and h then
 447                         local ch = string.char(c)
 448                         cw[ch] = w
 449                         total_width = total_width + w
 450                         char_count = char_count + 1
 451                 end
 452         end
 453
 454         local cbw, cbh = signs_lib.read_image_size(TP.."/signs_lib_color_"..font_size.."px_n.png")
 455         assert(cbw and cbh, "error reading bg dimensions")
 456         return cw, cbw, cbh, (total_width / char_count)
 457 end
 458
 459 signs_lib.charwidth15,
 460 signs_lib.colorbgw15,
 461 signs_lib.lineheight15,
 462 signs_lib.avgwidth15 = build_char_db(15)
 463
 464 signs_lib.charwidth31,
 465 signs_lib.colorbgw31,
 466 signs_lib.lineheight31,
 467 signs_lib.avgwidth31 = build_char_db(31)
 468
 469 local sign_groups = {choppy=2, dig_immediate=2}
 470 local fences_with_sign = { }
 471
 472 -- some local helper functions
 473
 474 local math_max = math.max
 475
 476 local function fill_line(x, y, w, c, font_size, colorbgw)
 477         c = c or "0"
 478         local tex = { }
 479         for xx = 0, math.max(0, w), colorbgw do
 480                 table.insert(tex, (":%d,%d=signs_lib_color_"..font_size.."px_%s.png"):format(x + xx, y, c))
 481         end
 482         return table.concat(tex)
 483 end
 484
 485 -- make char texture file name
 486 -- if texture file does not exist use fallback texture instead
 487 local function char_tex(font_name, ch)
 488         if ctexcache[font_name..ch] then
 489                 return ctexcache[font_name..ch], true
 490         else
 491                 local c = ch:byte()
 492                 local exists, tex = file_exists(CHAR_PATH:format(font_name, c))
 493                 if exists and c ~= 14 then
 494                         tex = CHAR_FILE:format(font_name, c)
 495                 else
 496                         tex = CHAR_FILE:format(font_name, 0x0)
 497                 end
 498                 ctexcache[font_name..ch] = tex
 499                 return tex, exists
 500         end
 501 end
 502
 503 local function make_line_texture(line, lineno, pos, line_width, line_height, cwidth_tab, font_size, colorbgw)
 504         local width = 0
 505         local maxw = 0
 506         local font_name = "signs_lib_font_"..font_size.."px"
 507
 508         local words = { }
 509         local node = minetest.get_node(pos)
 510         local def = minetest.registered_items[node.name]
 511         local default_color = def.default_color or 0
 512
 513         local cur_color = tonumber(default_color, 16)
 514
 515         -- We check which chars are available here.
 516         for word_i, word in ipairs(line) do
 517                 local chars = { }
 518                 local ch_offs = 0
 519                 word = string.gsub(word, "%^[12345678abcdefgh]", {
 520                         ["^1"] = string.char(0x81),
 521                         ["^2"] = string.char(0x82),
 522                         ["^3"] = string.char(0x83),
 523                         ["^4"] = string.char(0x84),
 524                         ["^5"] = string.char(0x85),
 525                         ["^6"] = string.char(0x86),
 526                         ["^7"] = string.char(0x87),
 527                         ["^8"] = string.char(0x88),
 528                         ["^a"] = string.char(0x8a),
 529                         ["^b"] = string.char(0x8b),
 530                         ["^c"] = string.char(0x8c),
 531                         ["^d"] = string.char(0x8d),
 532                         ["^e"] = string.char(0x8e),
 533                         ["^f"] = string.char(0x8f),
 534                         ["^g"] = string.char(0x90),
 535                         ["^h"] = string.char(0x91)
 536                 })
 537                 local word_l = #word
 538                 local i = 1
 539                 while i <= word_l  do
 540                         local c = word:sub(i, i)
 541                         if c == "#" then
 542                                 local cc = tonumber(word:sub(i+1, i+1), 16)
 543                                 if cc then
 544                                         i = i + 1
 545                                         cur_color = cc
 546                                 end
 547                         else
 548                                 local w = cwidth_tab[c]
 549                                 if w then
 550                                         width = width + w + 1
 551                                         if width >= (line_width - cwidth_tab[" "]) then
 552                                                 width = 0
 553                                         else
 554                                                 maxw = math_max(width, maxw)
 555                                         end
 556                                         if #chars < MAX_INPUT_CHARS then
 557                                                 table.insert(chars, {
 558                                                         off = ch_offs,
 559                                                         tex = char_tex(font_name, c),
 560                                                         col = ("%X"):format(cur_color),
 561                                                 })
 562                                         end
 563                                         ch_offs = ch_offs + w
 564                                 end
 565                         end
 566                         i = i + 1
 567                 end
 568                 width = width + cwidth_tab[" "] + 1
 569                 maxw = math_max(width, maxw)
 570                 table.insert(words, { chars=chars, w=ch_offs })
 571         end
 572
 573         -- Okay, we actually build the "line texture" here.
 574
 575         local texture = { }
 576
 577         local start_xpos = math.floor((line_width - maxw) / 2) + def.x_offset
 578
 579         local xpos = start_xpos
 580         local ypos = (line_height + def.line_spacing)* lineno + def.y_offset
 581
 582         cur_color = nil
 583
 584         for word_i, word in ipairs(words) do
 585                 local xoffs = (xpos - start_xpos)
 586                 if (xoffs > 0) and ((xoffs + word.w) > maxw) then
 587                         table.insert(texture, fill_line(xpos, ypos, maxw, "n", font_size, colorbgw))
 588                         xpos = start_xpos
 589                         ypos = ypos + line_height + def.line_spacing
 590                         lineno = lineno + 1
 591                         if lineno >= def.number_of_lines then break end
 592                         table.insert(texture, fill_line(xpos, ypos, maxw, cur_color, font_size, colorbgw))
 593                 end
 594                 for ch_i, ch in ipairs(word.chars) do
 595                         if ch.col ~= cur_color then
 596                                 cur_color = ch.col
 597                                 table.insert(texture, fill_line(xpos + ch.off, ypos, maxw, cur_color, font_size, colorbgw))
 598                         end
 599                         table.insert(texture, (":%d,%d=%s"):format(xpos + ch.off, ypos, ch.tex))
 600                 end
 601                 table.insert(
 602                         texture,
 603                         (":%d,%d="):format(xpos + word.w, ypos) .. char_tex(font_name, " ")
 604                 )
 605                 xpos = xpos + word.w + cwidth_tab[" "]
 606                 if xpos >= (line_width + cwidth_tab[" "]) then break end
 607         end
 608
 609         table.insert(texture, fill_line(xpos, ypos, maxw, "n", font_size, colorbgw))
 610         table.insert(texture, fill_line(start_xpos, ypos + line_height, maxw, "n", font_size, colorbgw))
 611
 612         return table.concat(texture), lineno
 613 end
 614
 615 local function make_sign_texture(lines, pos)
 616         local node = minetest.get_node(pos)
 617         local def = minetest.registered_items[node.name]
 618         if not def or not def.entity_info then return end
 619
 620         local font_size
 621         local line_width
 622         local line_height
 623         local char_width
 624         local colorbgw
 625
 626         if def.font_size and def.font_size == 31 then
 627                 font_size = 31
 628                 line_width = math.floor(signs_lib.avgwidth31 * def.chars_per_line) * def.horiz_scaling
 629                 line_height = signs_lib.lineheight31
 630                 char_width = signs_lib.charwidth31
 631                 colorbgw = signs_lib.colorbgw31
 632         else
 633                 font_size = 15
 634                 line_width = math.floor(signs_lib.avgwidth15 * def.chars_per_line) * def.horiz_scaling
 635                 line_height = signs_lib.lineheight15
 636                 char_width = signs_lib.charwidth15
 637                 colorbgw = signs_lib.colorbgw15
 638         end
 639
 640         local texture = { ("[combine:%dx%d"):format(line_width, (line_height + def.line_spacing) * def.number_of_lines * def.vert_scaling) }
 641
 642         local lineno = 0
 643         for i = 1, #lines do
 644                 if lineno >= def.number_of_lines then break end
 645                 local linetex, ln = make_line_texture(lines[i], lineno, pos, line_width, line_height, char_width, font_size, colorbgw)
 646                 table.insert(texture, linetex)
 647                 lineno = ln + 1
 648         end
 649         table.insert(texture, "^[makealpha:0,0,0")
 650         return table.concat(texture, "")
 651 end
 652
 653 function signs_lib.split_lines_and_words(text)
 654         if not text then return end
 655         local lines = { }
 656         for _, line in ipairs(text:split("\n")) do
 657                 table.insert(lines, line:split(" "))
 658         end
 659         return lines
 660 end
 661
 662 function signs_lib.set_obj_text(pos, text)
 663         local split = signs_lib.split_lines_and_words
 664         local text_ansi = Utf8ToAnsi(text)
 665         local n = minetest.registered_nodes[minetest.get_node(pos).name]
 666         signs_lib.delete_objects(pos)
 667         signs_lib.spawn_entity(pos, make_sign_texture(split(text_ansi), pos))
 668 end
 669
 670 local function make_widefont_nodename(name)
 671         if string.find(name, "_widefont") then return name end
 672         if string.find(name, "_onpole")  then
 673                 if string.find(name, "_horiz") then
 674                         return string.gsub(name, "_onpole_horiz", "_widefont_onpole_horiz")
 675                 else
 676                         return string.gsub(name, "_onpole", "_widefont_onpole")
 677                 end
 678         elseif string.find(name, "_hanging") then
 679                 return string.gsub(name, "_hanging", "_widefont_hanging")
 680         else
 681                 return name.."_widefont"
 682         end
 683 end
 684
 685 function signs_lib.construct_sign(pos)
 686         local form = "size[6,4]"..
 687                 "textarea[0,-0.3;6.5,3;text;;${text}]"..
 688                 "background[-0.5,-0.5;7,5;signs_lib_sign_bg.jpg]"
 689         local node = minetest.get_node(pos)
 690         local wname = make_widefont_nodename(node.name)
 691
 692         if minetest.registered_items[wname] then
 693                 local state = "off"
 694                 if string.find(node.name, "widefont") then state = "on" end
 695                 form = form.."label[1,3.4;Use wide font]"..
 696                         "image_button[1.1,3.7;1,0.6;signs_lib_switch_"..
 697                         state..".png;"..
 698                         state..";;;false;signs_lib_switch_interm.png]"..
 699                         "button_exit[3,3.4;2,1;ok;"..S("Write").."]"
 700         else
 701                 form = form.."button_exit[2,3.4;2,1;ok;"..S("Write").."]"
 702         end
 703
 704         local meta = minetest.get_meta(pos)
 705         meta:set_string("formspec", form)
 706         local i = meta:get_string("infotext")
 707         if i == "" then -- it wasn't even set, so set it.
 708                 meta:set_string("infotext", "")
 709         end
 710 end
 711
 712 function signs_lib.destruct_sign(pos)
 713         signs_lib.delete_objects(pos)
 714 end
 715
 716 local function make_infotext(text)
 717         text = trim_input(text)
 718         local lines = signs_lib.split_lines_and_words(text) or {}
 719         local lines2 = { }
 720         for _, line in ipairs(lines) do
 721                 table.insert(lines2, (table.concat(line, " "):gsub("#[0-9a-fA-F]", ""):gsub("##", "#")))
 722         end
 723         return table.concat(lines2, "\n")
 724 end
 725
 726 function signs_lib.update_sign(pos, fields)
 727         local meta = minetest.get_meta(pos)
 728
 729         local text = fields and fields.text or meta:get_string("text")
 730         text = trim_input(text)
 731
 732         local owner = meta:get_string("owner")
 733         local ownstr = ""
 734         if owner ~= "" then ownstr = S("Locked sign, owned by @1\n", owner) end
 735
 736         meta:set_string("text", text)
 737         meta:set_string("infotext", ownstr..make_infotext(text).." ")
 738         signs_lib.set_obj_text(pos, text)
 739 end
 740
 741 function signs_lib.receive_fields(pos, formname, fields, sender)
 742
 743         if not fields or not signs_lib.can_modify(pos, sender) then return end
 744
 745         if fields.text and fields.ok then
 746                 minetest.log("action", S("@1 wrote \"@2\" to sign at @3",
 747                         (sender:get_player_name() or ""),
 748                         fields.text:gsub('\\', '\\\\'):gsub("\n", "\\n"),
 749                         minetest.pos_to_string(pos)
 750                 ))
 751                 signs_lib.update_sign(pos, fields)
 752         elseif fields.on or fields.off then
 753                 local node = minetest.get_node(pos)
 754                 local newname
 755
 756                 if fields.on and string.find(node.name, "widefont") then
 757                         newname = string.gsub(node.name, "_widefont", "")
 758                 elseif fields.off and not string.find(node.name, "widefont") then
 759                         newname = make_widefont_nodename(node.name)
 760                 end
 761                 if newname then
 762                         minetest.log("action", S("@1 flipped the wide-font switch to \"@2\" at @3",
 763                                 (sender:get_player_name() or ""),
 764                                 (fields.on and "off" or "on"),
 765                                 minetest.pos_to_string(pos)
 766                         ))
 767
 768                         minetest.swap_node(pos, {name = newname, param2 = node.param2})
 769                         signs_lib.construct_sign(pos)
 770                         signs_lib.update_sign(pos, fields)
 771                 end
 772         end
 773 end
 774
 775 function signs_lib.can_modify(pos, player)
 776         local meta = minetest.get_meta(pos)
 777         local owner = meta:get_string("owner")
 778         local playername = player:get_player_name()
 779
 780         if minetest.is_protected(pos, playername) then
 781                 minetest.record_protection_violation(pos, playername)
 782                 return false
 783         end
 784
 785         if owner == ""
 786           or playername == owner
 787           or (minetest.check_player_privs(playername, {sign_editor=true}))
 788           or (playername == minetest.settings:get("name")) then
 789                 return true
 790         end
 791         minetest.record_protection_violation(pos, playername)
 792         return false
 793 end
 794
 795 -- make selection boxes
 796 -- sizex/sizey specified in inches because that's what MUTCD uses.
 797
 798 function signs_lib.make_selection_boxes(sizex, sizey, foo, xoffs, yoffs, zoffs, is_facedir)
 799
 800         local tx = (sizex * 0.0254 ) / 2
 801         local ty = (sizey * 0.0254 ) / 2
 802         local xo = xoffs and xoffs * 0.0254 or 0
 803         local yo = yoffs and yoffs * 0.0254 or 0
 804         local zo = zoffs and zoffs * 0.0254 or 0
 805
 806         if not is_facedir then
 807                 return {
 808                         type = "wallmounted",
 809                         wall_side =   { -0.5 + zo, -ty + yo, -tx + xo, -0.4375 + zo, ty + yo, tx + xo },
 810                         wall_top =    { -tx - xo, 0.5 + zo, -ty + yo, tx - xo, 0.4375 + zo, ty + yo},
 811                         wall_bottom = { -tx - xo, -0.5 + zo, -ty + yo, tx - xo, -0.4375 + zo, ty + yo }
 812                 }
 813         else
 814                 return {
 815                         type = "fixed",
 816                         fixed = { -tx + xo, -ty + yo, 0.5 + zo, tx + xo, ty + yo, 0.4375 + zo}
 817                 }
 818         end
 819 end
 820
 821 function signs_lib.check_for_pole(pos, pointed_thing)
 822         local node = minetest.get_node(pos)
 823         local def = minetest.registered_items[node.name]
 824
 825         local ppos = minetest.get_pointed_thing_position(pointed_thing)
 826         local pnode = minetest.get_node(ppos)
 827         local pdef = minetest.registered_items[pnode.name]
 828
 829         if (signs_lib.allowed_poles[pnode.name]
 830           or (pdef and pdef.drawtype == "fencelike")
 831           or string.find(pnode.name, "default:fence_")
 832           or string.find(pnode.name, "_post")
 833           or string.find(pnode.name, "fencepost")
 834           or string.find(pnode.name, "streets:streetlamp_basic_top")
 835           or (pnode.name == "streets:bigpole" and pnode.param2 < 4)
 836           or (pnode.name == "streets:bigpole" and pnode.param2 > 19 and pnode.param2 < 24) )
 837           and (pos.x ~= ppos.x or pos.z ~= ppos.z) then
 838                 return true
 839         elseif pnode.name == "streets:bigpole_tjunction" then
 840                 if def.paramtype2 == "wallmounted" then
 841                         if   (node.param2 == 4 and vtj_north[pnode.param2])
 842                           or (node.param2 == 2 and vtj_east[pnode.param2])
 843                           or (node.param2 == 5 and vtj_south[pnode.param2])
 844                           or (node.param2 == 3 and vtj_west[pnode.param2]) then
 845                                 return true
 846                         end
 847                 else
 848                         if   (node.param2 == 0 and vtj_north[pnode.param2])
 849                           or (node.param2 == 1 and vtj_east[pnode.param2])
 850                           or (node.param2 == 2 and vtj_south[pnode.param2])
 851                           or (node.param2 == 3 and vtj_west[pnode.param2]) then
 852                                 return true
 853                         end
 854                 end
 855         end
 856 end
 857
 858 function signs_lib.check_for_horizontal_pole(pos, pointed_thing)
 859         local node = minetest.get_node(pos)
 860         local def = minetest.registered_items[node.name]
 861         local ppos = minetest.get_pointed_thing_position(pointed_thing)
 862         local pnode = minetest.get_node(ppos)
 863         if pnode.name == "streets:bigpole" and pnode.param2 > 3 and pnode.param2 < 12 then
 864                 if def.paramtype2 == "wallmounted" then
 865                         if node.param2 == 2 or node.param2 == 3 -- E/W
 866                                 then return true
 867                         end
 868                 else
 869                         if node.param2 == 1 or node.param2 == 3 -- E/W
 870                                 then return true
 871                         end
 872                 end
 873         elseif pnode.name == "streets:bigpole" and pnode.param2 > 11 and pnode.param2 < 20 then
 874                 if def.paramtype2 == "wallmounted" then
 875                         if node.param2 == 4 or node.param2 == 5 then
 876                                 return true
 877                         end
 878                 else
 879                         if node.param2 == 0 or node.param2 == 2 then
 880                                 return true
 881                         end
 882                 end
 883         elseif pnode.name == "streets:bigpole_tjunction" then
 884                 if def.paramtype2 == "wallmounted" then
 885                         if   (node.param2 == 4 and htj_north[pnode.param2])
 886                           or (node.param2 == 2 and htj_east[pnode.param2])
 887                           or (node.param2 == 5 and htj_south[pnode.param2])
 888                           or (node.param2 == 3 and htj_west[pnode.param2]) then
 889                                 return true
 890                         end
 891                 else
 892                         if   (node.param2 == 0 and htj_north[pnode.param2])
 893                           or (node.param2 == 1 and htj_east[pnode.param2])
 894                           or (node.param2 == 2 and htj_south[pnode.param2])
 895                           or (node.param2 == 3 and htj_west[pnode.param2]) then
 896                                 return true
 897                         end
 898                 end
 899         end
 900 end
 901
 902 function signs_lib.check_for_ceiling(pointed_thing)
 903         if pointed_thing.above.x == pointed_thing.under.x
 904           and pointed_thing.above.z == pointed_thing.under.z
 905           and pointed_thing.above.y < pointed_thing.under.y then
 906                 return true
 907         end
 908 end
 909
 910 function signs_lib.check_for_floor(pointed_thing)
 911         if pointed_thing.above.x == pointed_thing.under.x
 912           and pointed_thing.above.z == pointed_thing.under.z
 913           and pointed_thing.above.y > pointed_thing.under.y then
 914                 return true
 915         end
 916 end
 917
 918 function signs_lib.after_place_node(pos, placer, itemstack, pointed_thing, locked)
 919         local playername = placer:get_player_name()
 920         local def = minetest.registered_items[itemstack:get_name()]
 921
 922         local ppos = minetest.get_pointed_thing_position(pointed_thing)
 923         local pnode = minetest.get_node(ppos)
 924         local pdef = minetest.registered_items[pnode.name]
 925         if def.allow_onpole and signs_lib.check_for_pole(pos, pointed_thing) then
 926                 local newparam2
 927                 local lookdir = minetest.yaw_to_dir(placer:get_look_horizontal())
 928                 if def.paramtype2 == "wallmounted" then
 929                         newparam2 = minetest.dir_to_wallmounted(lookdir)
 930                 else
 931                         newparam2 = minetest.dir_to_facedir(lookdir)
 932                 end
 933                 local node = minetest.get_node(pos)
 934                 minetest.swap_node(pos, {name = itemstack:get_name().."_onpole", param2 = newparam2})
 935         elseif def.allow_onpole_horizontal and signs_lib.check_for_horizontal_pole(pos, pointed_thing) then
 936                 local newparam2
 937                 local lookdir = minetest.yaw_to_dir(placer:get_look_horizontal())
 938                 if def.paramtype2 == "wallmounted" then
 939                         newparam2 = minetest.dir_to_wallmounted(lookdir)
 940                 else
 941                         newparam2 = minetest.dir_to_facedir(lookdir)
 942                 end
 943                 local node = minetest.get_node(pos)
 944                 minetest.swap_node(pos, {name = itemstack:get_name().."_onpole_horiz", param2 = newparam2})
 945         elseif def.allow_hanging and signs_lib.check_for_ceiling(pointed_thing) then
 946                 local newparam2 = minetest.dir_to_facedir(placer:get_look_dir())
 947                 local node = minetest.get_node(pos)
 948                 minetest.swap_node(pos, {name = itemstack:get_name().."_hanging", param2 = newparam2})
 949         elseif def.paramtype2 == "facedir" and signs_lib.check_for_ceiling(pointed_thing) then
 950                 minetest.swap_node(pos, {name = itemstack:get_name(), param2 = 6})
 951         elseif def.paramtype2 == "facedir" and signs_lib.check_for_floor(pointed_thing) then
 952                 minetest.swap_node(pos, {name = itemstack:get_name(), param2 = 4})
 953         end
 954         if locked then
 955                 local meta = minetest.get_meta(pos)
 956                 meta:set_string("owner", playername)
 957                 meta:set_string("infotext", S("Locked sign, owned by @1\n", playername))
 958         end
 959 end
 960
 961 function signs_lib.register_fence_with_sign()
 962         minetest.log("warning", "[signs_lib] ".."Attempt to call no longer used function signs_lib.register_fence_with_sign()")
 963 end
 964
 965 local function register_sign(name, rdef)
 966         local def = table.copy(rdef)
 967
 968         if rdef.entity_info == "standard" then
 969                 def.entity_info = {
 970                         mesh = "signs_lib_standard_wall_sign_entity.obj",
 971                         yaw = signs_lib.wallmounted_yaw
 972                 }
 973         elseif rdef.entity_info then
 974                 def.entity_info = rdef.entity_info
 975         end
 976
 977         def.after_place_node = rdef.after_place_node or signs_lib.after_place_node
 978
 979         if rdef.entity_info then
 980                 def.on_rightclick       = rdef.on_rightclick       or signs_lib.construct_sign
 981                 def.on_construct        = rdef.on_construct        or signs_lib.construct_sign
 982                 def.on_destruct         = rdef.on_destruct         or signs_lib.destruct_sign
 983                 def.on_receive_fields   = rdef.on_receive_fields   or signs_lib.receive_fields
 984                 def.on_punch            = rdef.on_punch            or signs_lib.update_sign
 985                 def.number_of_lines     = rdef.number_of_lines     or signs_lib.standard_lines
 986                 def.horiz_scaling       = rdef.horiz_scaling       or signs_lib.standard_hscale
 987                 def.vert_scaling        = rdef.vert_scaling        or signs_lib.standard_vscale
 988                 def.line_spacing        = rdef.line_spacing        or signs_lib.standard_lspace
 989                 def.font_size           = rdef.font_size           or signs_lib.standard_fsize
 990                 def.x_offset            = rdef.x_offset            or signs_lib.standard_xoffs
 991                 def.y_offset            = rdef.y_offset            or signs_lib.standard_yoffs
 992                 def.chars_per_line      = rdef.chars_per_line      or signs_lib.standard_cpl
 993                 def.default_color       = rdef.default_color       or "0"
 994                 if rdef.locked and not rdef.after_place_node then
 995                         def.after_place_node = function(pos, placer, itemstack, pointed_thing)
 996                                 signs_lib.after_place_node(pos, placer, itemstack, pointed_thing, true)
 997                         end
 998                 end
 999         end
1000
1001         def.paramtype           = rdef.paramtype           or "light"
1002         def.drawtype            = rdef.drawtype            or "mesh"
1003         def.mesh                = rdef.mesh                or "signs_lib_standard_wall_sign.obj"
1004         def.wield_image         = rdef.wield_image         or def.inventory_image
1005         def.drop                = rdef.drop                or name
1006         def.sounds              = rdef.sounds              or signs_lib.standard_wood_sign_sounds
1007         def.paramtype2          = rdef.paramtype2          or "wallmounted"
1008         def.on_rotate           = rdef.on_rotate           or signs_lib.handle_rotation
1009
1010         if rdef.groups then
1011                 def.groups = rdef.groups
1012         else
1013                 def.groups = signs_lib.standard_wood_groups
1014         end
1015
1016         local cbox = signs_lib.make_selection_boxes(35, 25)
1017
1018         def.selection_box = rdef.selection_box or cbox
1019         def.node_box      = table.copy(rdef.node_box or rdef.selection_box or cbox)
1020
1021         if def.sunlight_propagates ~= false then
1022                 def.sunlight_propagates = true
1023         end
1024
1025         minetest.register_node(":"..name, def)
1026         table.insert(signs_lib.lbm_restore_nodes, name)
1027
1028         local opdef = table.copy(def)
1029
1030         if rdef.allow_onpole or rdef.allow_onpole_horizontal then
1031
1032                 local offset = 0.3125
1033                 if opdef.uses_slim_pole_mount then
1034                         offset = 0.35
1035                 end
1036
1037                 opdef.selection_box = rdef.onpole_selection_box or opdef.selection_box
1038                 opdef.node_box = rdef.onpole_node_box or opdef.selection_box
1039
1040                 if opdef.paramtype2 == "wallmounted" then
1041                         opdef.node_box.wall_side[1] = def.node_box.wall_side[1] - offset
1042                         opdef.node_box.wall_side[4] = def.node_box.wall_side[4] - offset
1043
1044                         opdef.selection_box.wall_side[1] = def.selection_box.wall_side[1] - offset
1045                         opdef.selection_box.wall_side[4] = def.selection_box.wall_side[4] - offset
1046                 else
1047                         opdef.node_box.fixed[3] = def.node_box.fixed[3] + offset
1048                         opdef.node_box.fixed[6] = def.node_box.fixed[6] + offset
1049
1050                         opdef.selection_box.fixed[3] = def.selection_box.fixed[3] + offset
1051                         opdef.selection_box.fixed[6] = def.selection_box.fixed[6] + offset
1052                 end
1053
1054                 opdef.groups.not_in_creative_inventory = 1
1055                 opdef.mesh = string.gsub(opdef.mesh, ".obj$", "_onpole.obj")
1056
1057                 if opdef.entity_info then
1058                         opdef.entity_info.mesh = string.gsub(opdef.entity_info.mesh, ".obj$", "_onpole.obj")
1059                 end
1060         end
1061
1062         -- setting one of item 3 or 4 to a texture and leaving the other "blank",
1063         -- reveals either the vertical or horizontal pole mount part of the model
1064
1065         if rdef.allow_onpole then
1066                 opdef.tiles[3] = "signs_lib_pole_mount.png"
1067                 opdef.tiles[4] = "signs_lib_blank.png"
1068                 minetest.register_node(":"..name.."_onpole", opdef)
1069                 table.insert(signs_lib.lbm_restore_nodes, name.."_onpole")
1070         end
1071
1072         local ophdef = table.copy(opdef)
1073
1074         if rdef.allow_onpole_horizontal then
1075                 ophdef.tiles[3] = "signs_lib_blank.png"
1076                 ophdef.tiles[4] = "signs_lib_pole_mount.png"
1077                 minetest.register_node(":"..name.."_onpole_horiz", ophdef)
1078                 table.insert(signs_lib.lbm_restore_nodes, name.."_onpole_horiz")
1079         end
1080
1081         if rdef.allow_hanging then
1082
1083                 local hdef = table.copy(def)
1084                 hdef.paramtype2 = "facedir"
1085
1086                 local hcbox = signs_lib.make_selection_boxes(35, 32, nil, 0, 3, -18.5, true)
1087
1088                 hdef.selection_box = rdef.hanging_selection_box or hcbox
1089                 hdef.node_box = rdef.hanging_node_box or rdef.hanging_selection_box or hcbox
1090
1091                 hdef.groups.not_in_creative_inventory = 1
1092                 hdef.tiles[3] = "signs_lib_hangers.png"
1093                 hdef.mesh = string.gsub(string.gsub(hdef.mesh, "_facedir.obj", ".obj"), ".obj$", "_hanging.obj")
1094
1095                 if hdef.entity_info then
1096                         hdef.entity_info.mesh = string.gsub(string.gsub(hdef.entity_info.mesh, "_facedir.obj", ".obj"), ".obj$", "_hanging.obj")
1097                         hdef.entity_info.yaw = signs_lib.standard_yaw
1098                 end
1099
1100                 minetest.register_node(":"..name.."_hanging", hdef)
1101                 table.insert(signs_lib.lbm_restore_nodes, name.."_hanging")
1102         end
1103 end
1104
1105 --[[
1106 The main sign registration function
1107 ===================================
1108
1109 Example minimal recommended def for writable signs:
1110
1111 signs_lib.register_sign("foo:my_cool_sign", {
1112         description = "Wooden cool sign",
1113         inventory_image = "signs_lib_sign_cool_inv.png",
1114         tiles = {
1115                 "signs_lib_sign_cool.png",
1116                 "signs_lib_sign_cool_edges.png"
1117         },
1118         number_of_lines = 2,
1119         horiz_scaling = 0.8,
1120         vert_scaling = 1,
1121         line_spacing = 9,
1122         font_size = 31,
1123         x_offset = 7,
1124         y_offset = 4,
1125         chars_per_line = 40,
1126         entity_info = "standard"
1127 })
1128
1129 * default def assumes a wallmounted sign with on-pole being allowed.
1130
1131 *For signs that can support being on a pole, include in the def:
1132         allow_onpole = true,
1133         (defaults to disabled)
1134
1135 *For signs that can support being on a horizontal pole, include in the def:
1136         allow_onpole_horizontal = true,
1137         (defaults to disabled)
1138
1139 * onpole/onpole_horizontal are independent; one may be allowed without the other
1140
1141 * "standard" entity info implies the standard wood/steel sign model, in
1142   wallmounted mode.  For facedir signs using the standard model, use:
1143
1144         entity_info = {
1145                 mesh = "signs_lib_standard_wall_sign_entity.obj",
1146                 yaw = signs_lib.standard_yaw
1147         },
1148
1149 ]]--
1150
1151 function signs_lib.register_sign(name, rdef)
1152         register_sign(name, rdef)
1153
1154         if rdef.allow_widefont then
1155
1156                 local wdef = table.copy(minetest.registered_items[name])
1157                 wdef.groups.not_in_creative_inventory = 1
1158                 wdef.horiz_scaling = wdef.horiz_scaling / 2
1159
1160                 register_sign(name.."_widefont", wdef)
1161         end
1162 end
1163
1164 -- restore signs' text after /clearobjects and the like, the next time
1165 -- a block is reloaded by the server.
1166
1167 minetest.register_lbm({
1168         nodenames = signs_lib.lbm_restore_nodes,
1169         name = "signs_lib:restore_sign_text",
1170         label = "Restore sign text",
1171         run_at_every_load = true,
1172         action = function(pos, node)
1173                 signs_lib.update_sign(pos,nil,nil,node)
1174         end
1175 })
1176
1177 -- Convert old signs on fenceposts into signs on.. um.. fence posts :P
1178
1179 minetest.register_lbm({
1180         nodenames = signs_lib.old_fenceposts_with_signs,
1181         name = "signs_lib:fix_fencepost_signs",
1182         label = "Change single-node signs on fences into normal",
1183         run_at_every_load = true,
1184         action = function(pos, node)
1185
1186                 local fdir = node.param2 % 8
1187                 local signpos = {
1188                         x = pos.x + signs_lib.fdir_to_back[fdir+1][1],
1189                         y = pos.y,
1190                         z = pos.z + signs_lib.fdir_to_back[fdir+1][2]
1191                 }
1192
1193                 if minetest.get_node(signpos).name == "air" then
1194                         local new_wmdir = minetest.dir_to_wallmounted(minetest.facedir_to_dir(fdir))
1195                         local oldfence =  signs_lib.old_fenceposts[node.name]
1196                         local newsign =   signs_lib.old_fenceposts_replacement_signs[node.name]
1197
1198                         signs_lib.delete_objects(pos)
1199
1200                         local oldmeta = minetest.get_meta(pos):to_table()
1201                         minetest.set_node(pos, {name = oldfence})
1202                         minetest.set_node(signpos, { name = newsign, param2 = new_wmdir })
1203                         local newmeta = minetest.get_meta(signpos)
1204                         newmeta:from_table(oldmeta)
1205                         signs_lib.update_sign(signpos)
1206                 end
1207         end
1208 })
1209
1210 signs_lib.block_list = {}
1211 signs_lib.totalblocks = 0
1212
1213 -- Maintain a list of currently-loaded blocks
1214 minetest.register_lbm({
1215         nodenames = {"group:sign"},
1216         name = "signs_lib:update_block_list",
1217         label = "Update list of loaded blocks, log only those with signs",
1218         run_at_every_load = true,
1219         action = function(pos, node)
1220                 -- yeah, yeah... I know I'm hashing a block pos, but it's still just a set of coords
1221                 local hash = minetest.hash_node_position(vector.floor(vector.divide(pos, core.MAP_BLOCKSIZE)))
1222                 if not signs_lib.block_list[hash] then
1223                         signs_lib.block_list[hash] = true
1224                         signs_lib.totalblocks = signs_lib.totalblocks + 1
1225                 end
1226         end
1227 })
1228
1229 minetest.register_chatcommand("regen_signs", {
1230         params = "",
1231         privs = {server = true},
1232         description = "Skims through all currently-loaded sign-bearing mapblocks, clears away any entities within each sign's node space, and regenerates their text entities, if any.",
1233         func = function(player_name, params)
1234                 local allsigns = {}
1235                 local totalsigns = 0
1236                 for b in pairs(signs_lib.block_list) do
1237                         local blockpos = minetest.get_position_from_hash(b)
1238                         local pos1 = vector.multiply(blockpos, core.MAP_BLOCKSIZE)
1239                         local pos2 = vector.add(pos1, core.MAP_BLOCKSIZE - 1)
1240                         if minetest.get_node_or_nil(vector.add(pos1, core.MAP_BLOCKSIZE/2)) then
1241                                 local signs_in_block = minetest.find_nodes_in_area(pos1, pos2, {"group:sign"})
1242                                 allsigns[#allsigns + 1] = signs_in_block
1243                                 totalsigns = totalsigns + #signs_in_block
1244                         else
1245                                 signs_lib.block_list[b] = nil -- if the block is no longer loaded, remove it from the table
1246                                 signs_lib.totalblocks = signs_lib.totalblocks - 1
1247                         end
1248                 end
1249                 if signs_lib.totalblocks < 0 then signs_lib.totalblocks = 0 end
1250                 if totalsigns == 0 then
1251                         minetest.chat_send_player(player_name, "There are no signs in the currently-loaded terrain.")
1252                         signs_lib.block_list = {}
1253                         return
1254                 end
1255
1256                 minetest.chat_send_player(player_name, "Found a total of "..totalsigns.." sign nodes across "..signs_lib.totalblocks.." blocks.")
1257                 minetest.chat_send_player(player_name, "Regenerating sign entities...")
1258
1259                 for _, b in pairs(allsigns) do
1260                         for _, pos in ipairs(b) do
1261                                 signs_lib.delete_objects(pos)
1262                                 local node = minetest.get_node(pos)
1263                                 local def = minetest.registered_items[node.name]
1264                                 if def and def.entity_info then
1265                                         signs_lib.update_sign(pos)
1266                                 end
1267                         end
1268                 end
1269                 minetest.chat_send_player(player_name, "Finished.")
1270         end
1271 })