add support for cyrillic cahracters

diff --git a/encoding.lua b/encoding.lua
new file mode 100644 (file)
index 0000000..16e35fe
--- /dev/null
+++ b/encoding.lua
@@ -0,0 +1,265 @@
+-- encoding borrowed from signs_lib mod of https://github.com/lord-server/lord
+
+local ansi_decode = {
+       [128] = "\208\130",
+       [129] = "\208\131",
+       [130] = "\226\128\154",
+       [131] = "\209\147",
+       [132] = "\226\128\158",
+       [133] = "\226\128\166",
+       [134] = "\226\128\160",
+       [135] = "\226\128\161",
+       [136] = "\226\130\172",
+       [137] = "\226\128\176",
+       [138] = "\208\137",
+       [139] = "\226\128\185",
+       [140] = "\208\138",
+       [141] = "\208\140",
+       [142] = "\208\139",
+       [143] = "\208\143",
+       [144] = "\209\146",
+       [145] = "\226\128\152",
+       [146] = "\226\128\153",
+       [147] = "\226\128\156",
+       [148] = "\226\128\157",
+       [149] = "\226\128\162",
+       [150] = "\226\128\147",
+       [151] = "\226\128\148",
+       [152] = "\194\152",
+       [153] = "\226\132\162",
+       [154] = "\209\153",
+       [155] = "\226\128\186",
+       [156] = "\209\154",
+       [157] = "\209\156",
+       [158] = "\209\155",
+       [159] = "\209\159",
+       [160] = "\194\160",
+       [161] = "\209\142",
+       [162] = "\209\158",
+       [163] = "\208\136",
+       [164] = "\194\164",
+       [165] = "\210\144",
+       [166] = "\194\166",
+       [167] = "\194\167",
+       [168] = "\208\129",
+       [169] = "\194\169",
+       [170] = "\208\132",
+       [171] = "\194\171",
+       [172] = "\194\172",
+       [173] = "\194\173",
+       [174] = "\194\174",
+       [175] = "\208\135",
+       [176] = "\194\176",
+       [177] = "\194\177",
+       [178] = "\208\134",
+       [179] = "\209\150",
+       [180] = "\210\145",
+       [181] = "\194\181",
+       [182] = "\194\182",
+       [183] = "\194\183",
+       [184] = "\209\145",
+       [185] = "\226\132\150",
+       [186] = "\209\148",
+       [187] = "\194\187",
+       [188] = "\209\152",
+       [189] = "\208\133",
+       [190] = "\209\149",
+       [191] = "\209\151"
+}
+local utf8_decode = {
+       [128] = {
+               [147] = "\150",
+               [148] = "\151",
+               [152] = "\145",
+               [153] = "\146",
+               [154] = "\130",
+               [156] = "\147",
+               [157] = "\148",
+               [158] = "\132",
+               [160] = "\134",
+               [161] = "\135",
+               [162] = "\149",
+               [166] = "\133",
+               [176] = "\137",
+               [185] = "\139",
+               [186] = "\155"
+       },
+       [130] = {[172] = "\136"},
+       [132] = {[150] = "\185", [162] = "\153"},
+       [194] = {
+               [152] = "\152",
+               [160] = "\160",
+               [164] = "\164",
+               [166] = "\166",
+               [167] = "\167",
+               [169] = "\169",
+               [171] = "\171",
+               [172] = "\172",
+               [173] = "\173",
+               [174] = "\174",
+               [176] = "\176",
+               [177] = "\177",
+               [181] = "\181",
+               [182] = "\182",
+               [183] = "\183",
+               [187] = "\187"
+       },
+       [208] = {
+               [129] = "\168",
+               [130] = "\128",
+               [131] = "\129",
+               [132] = "\170",
+               [133] = "\189",
+               [134] = "\178",
+               [135] = "\175",
+               [136] = "\163",
+               [137] = "\138",
+               [138] = "\140",
+               [139] = "\142",
+               [140] = "\141",
+               [143] = "\143",
+               [144] = "\192",
+               [145] = "\193",
+               [146] = "\194",
+               [147] = "\195",
+               [148] = "\196",
+               [149] = "\197",
+               [150] = "\198",
+               [151] = "\199",
+               [152] = "\200",
+               [153] = "\201",
+               [154] = "\202",
+               [155] = "\203",
+               [156] = "\204",
+               [157] = "\205",
+               [158] = "\206",
+               [159] = "\207",
+               [160] = "\208",
+               [161] = "\209",
+               [162] = "\210",
+               [163] = "\211",
+               [164] = "\212",
+               [165] = "\213",
+               [166] = "\214",
+               [167] = "\215",
+               [168] = "\216",
+               [169] = "\217",
+               [170] = "\218",
+               [171] = "\219",
+               [172] = "\220",
+               [173] = "\221",
+               [174] = "\222",
+               [175] = "\223",
+               [176] = "\224",
+               [177] = "\225",
+               [178] = "\226",
+               [179] = "\227",
+               [180] = "\228",
+               [181] = "\229",
+               [182] = "\230",
+               [183] = "\231",
+               [184] = "\232",
+               [185] = "\233",
+               [186] = "\234",
+               [187] = "\235",
+               [188] = "\236",
+               [189] = "\237",
+               [190] = "\238",
+               [191] = "\239"
+       },
+       [209] = {
+               [128] = "\240",
+               [129] = "\241",
+               [130] = "\242",
+               [131] = "\243",
+               [132] = "\244",
+               [133] = "\245",
+               [134] = "\246",
+               [135] = "\247",
+               [136] = "\248",
+               [137] = "\249",
+               [138] = "\250",
+               [139] = "\251",
+               [140] = "\252",
+               [141] = "\253",
+               [142] = "\254",
+               [143] = "\255",
+               [144] = "\161",
+               [145] = "\184",
+               [146] = "\144",
+               [147] = "\131",
+               [148] = "\186",
+               [149] = "\190",
+               [150] = "\179",
+               [151] = "\191",
+               [152] = "\188",
+               [153] = "\154",
+               [154] = "\156",
+               [155] = "\158",
+               [156] = "\157",
+               [158] = "\162",
+               [159] = "\159"
+       },
+       [210] = {[144] = "\165", [145] = "\180"}
+}
+
+local nmdc = {
+       [36] = "$",
+       [124] = "|"
+}
+
+function AnsiToUtf8(s)
+       local r, b = ""
+       for i = 1, s and s:len() or 0 do
+               b = s:byte(i)
+               if b < 128 then
+                       r = r .. string.char(b)
+               else
+                       if b > 239 then
+                               r = r .. "\209" .. string.char(b - 112)
+                       elseif b > 191 then
+                               r = r .. "\208" .. string.char(b - 48)
+                       elseif ansi_decode[b] then
+                               r = r .. ansi_decode[b]
+                       else
+                               r = r .. "_"
+                       end
+               end
+       end
+       return r
+end
+
+function Utf8ToAnsi(s)
+       local a, j, r, b = 0, 0, ""
+       for i = 1, s and s:len() or 0 do
+               b = s:byte(i)
+               if b < 128 then
+                       if nmdc[b] then
+                               r = r .. nmdc[b]
+                       else
+                               r = r .. string.char(b)
+                       end
+               elseif a == 2 then
+                       a, j = a - 1, b
+               elseif a == 1 then
+                       --if j == nil or b == nil then return r end
+                       --print(j)
+                       --print(b)
+                       --local ansi = utf8_decode[j]
+                       --if ansi == nil then return r end
+                       --if ansi[b] == nil then return r end
+                       if utf8_decode[j] then
+                               if utf8_decode[j][b] then
+                                       a, r = a - 1, r .. utf8_decode[j][b]
+                               end
+                       end
+               elseif b == 226 then
+                       a = 2
+               elseif b == 194 or b == 208 or b == 209 or b == 210 then
+                       j, a = b, 1
+               else
+                       r = r .. "_"
+               end
+       end
+       return r
+end

diff --git a/init.lua b/init.lua
index 804a720329a1def68713622b3e51003edd48331d..9af90c45adcee62fe065fd0afb1f4414151e151f 100644 (file)
--- a/init.lua
+++ b/init.lua
@@ -16,8 +16,16 @@ local enable_colored_metal_signs = true
 local current_keyword = minetest.settings:get("interact_keyword") or "iaccept"
 
 signs_lib = {}
+signs_lib.path = minetest.get_modpath(minetest.get_current_modname())
 screwdriver = screwdriver or {}
 
+-- Load support for intllib.
+local S, NS = dofile(signs_lib.path .. "/intllib.lua")
+signs_lib.gettext = S
+
+-- text encoding
+dofile(signs_lib.path .. "/encoding.lua");
+
 signs_lib.wallmounted_rotate = function(pos, node, user, mode, new_param2)
        if mode ~= screwdriver.ROTATE_AXIS then return false end
        minetest.swap_node(pos, {name = node.name, param2 = (node.param2 + 1) % 6})
@@ -113,11 +121,6 @@ signs_lib.sign_post_model = {
        }
 }
 
--- Load support for intllib.
-local MP = minetest.get_modpath(minetest.get_current_modname())
-local S, NS = dofile(MP.."/intllib.lua")
-signs_lib.gettext = S
-
 -- the list of standard sign nodes
 
 signs_lib.sign_node_list = {
@@ -174,28 +177,48 @@ end
 
 -- CONSTANTS
 
-local MP = minetest.get_modpath("signs_lib")
-
--- Used by `build_char_db' to locate the file.
-local FONT_FMT = "%s/hdf_%02x.png"
-
--- Simple texture name for building text texture.
-local FONT_FMT_SIMPLE = "hdf_%02x.png"
-
 -- Path to the textures.
-local TP = MP.."/textures"
+local TP = signs_lib.path .. "/textures"
+-- Font file formatter
+local CHAR_FILE = "%s_%02x.png"
+-- Fonts path
+local CHAR_PATH = TP .. "/" .. CHAR_FILE
+
+-- Font name.
+local font_name = "hdf"
 
 -- Lots of overkill here. KISS advocates, go away, shoo! ;) -- kaeza
 
 local PNG_HDR = string.char(0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A)
 
+-- check if a file does exist
+-- to avoid reopening file after checking again
+-- pass TRUE as second argument
+function file_exists(name, return_handle, mode)
+       mode = mode or "r";
+       local f = io.open(name, mode)
+       if f ~= nil then
+               if (return_handle) then
+                       return f
+               end
+               io.close(f) 
+               return true 
+       else 
+               return false 
+       end
+end
+
 -- Read the image size from a PNG file.
 -- Returns image_w, image_h.
 -- Only the LSB is read from each field!
 local function read_image_size(filename)
-       local f = io.open(filename, "rb")
+       local f = file_exists(filename, true, "rb")
+       -- file might not exist (don't crash the game)
+       if (not f) then
+               return 0, 0
+       end
        f:seek("set", 0x0)
-       local hdr = f:read(8)
+       local hdr = f:read(string.len(PNG_HDR))
        if hdr ~= PNG_HDR then
                f:close()
                return
@@ -243,8 +266,8 @@ local function build_char_db()
        local total_width = 0
        local char_count = 0
 
-       for c = 32, 126 do
-               local w, h = read_image_size(FONT_FMT:format(TP, c))
+       for c = 32, 255 do
+               local w, h = read_image_size(CHAR_PATH:format(font_name, c))
                if w and h then
                        local ch = string.char(c)
                        charwidth[ch] = w
@@ -308,6 +331,19 @@ local function fill_line(x, y, w, c)
        return table.concat(tex)
 end
 
+-- make char texture file name
+-- if texture file does not exist use fallback texture instead
+local function char_tex(font_name, ch)
+       local c = ch:byte()
+       local exists, tex = file_exists(CHAR_PATH:format(font_name, c))
+       if exists and c ~= 14 then
+               tex = CHAR_FILE:format(font_name, c)
+       else
+               tex = CHAR_FILE:format(font_name, 0x0)
+       end
+       return tex, exists
+end
+
 local function make_line_texture(line, lineno, pos)
 
        local width = 0
@@ -344,9 +380,9 @@ local function make_line_texture(line, lineno, pos)
                                        end
                                        if #chars < MAX_INPUT_CHARS then
                                                table.insert(chars, {
-                                                       off=ch_offs,
-                                                       tex=FONT_FMT_SIMPLE:format(c:byte()),
-                                                       col=("%X"):format(cur_color),
+                                                       off = ch_offs,
+                                                       tex = char_tex(font_name, c),
+                                                       col = ("%X"):format(cur_color),
                                                })
                                        end
                                        ch_offs = ch_offs + w
@@ -387,7 +423,10 @@ local function make_line_texture(line, lineno, pos)
                        end
                        table.insert(texture, (":%d,%d=%s"):format(xpos + ch.off, ypos, ch.tex))
                end
-               table.insert(texture, (":%d,%d=hdf_20.png"):format(xpos + word.w, ypos))
+               table.insert(
+                       texture, 
+                       (":%d,%d="):format(xpos + word.w, ypos) .. char_tex(font_name, " ")
+               )
                xpos = xpos + word.w + charwidth[" "]
                if xpos >= (SIGN_WIDTH + charwidth[" "]) then break end
        end
@@ -413,10 +452,11 @@ end
 
 local function set_obj_text(obj, text, new, pos)
        local split = new and split_lines_and_words or split_lines_and_words_old
+       local text_ansi = Utf8ToAnsi(text)
        local n = minetest.registered_nodes[minetest.get_node(pos).name]
        local text_scale = (n and n.text_scale) or DEFAULT_TEXT_SCALE
        obj:set_properties({
-               textures={make_sign_texture(split(text), pos)},
+               textures={make_sign_texture(split(text_ansi), pos)},
                visual_size = text_scale,
        })
 end
@@ -636,7 +676,7 @@ function signs_lib.receive_fields(pos, formname, fields, sender, lock)
        if fields and fields.text and fields.ok then
                minetest.log("action", S("@1 wrote \"@2\" to @3sign at @4",
                        (sender:get_player_name() or ""),
-                       fields.text,
+                       fields.text:gsub('\\', '\\\\'):gsub("\n", "\\n"),
                        lockstr,
                        minetest.pos_to_string(pos)
                ))

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