]> git.lizzy.rs Git - minetest.git/blobdiff - builtin/common/misc_helpers.lua
Set placer to nil instead of a non-functional one in item_OnPlace (#6449)
[minetest.git] / builtin / common / misc_helpers.lua
index 1c9f2a48ff28ac0c30042a069336bea2241c694c..d7e0b6ae2197ecc2c2272cc336230cdf53a944db 100644 (file)
@@ -2,7 +2,6 @@
 
 --------------------------------------------------------------------------------
 -- Localize functions to avoid table lookups (better performance).
-local table_insert = table.insert
 local string_sub, string_find = string.sub, string.find
 
 --------------------------------------------------------------------------------
@@ -94,13 +93,13 @@ function dump2(o, name, dumped)
                                -- the form _G["table: 0xFFFFFFF"]
                                keyStr = string.format("_G[%q]", tostring(k))
                                -- Dump key table
-                               table_insert(t, dump2(k, keyStr, dumped))
+                               t[#t + 1] = dump2(k, keyStr, dumped)
                        end
                else
                        keyStr = basic_dump(k)
                end
                local vname = string.format("%s[%s]", name, keyStr)
-               table_insert(t, dump2(v, vname, dumped))
+               t[#t + 1] = dump2(v, vname, dumped)
        end
        return string.format("%s = {}\n%s", name, table.concat(t))
 end
@@ -135,7 +134,7 @@ function dump(o, indent, nested, level)
        local t = {}
        local dumped_indexes = {}
        for i, v in ipairs(o) do
-               table_insert(t, dump(v, indent, nested, level + 1))
+               t[#t + 1] = dump(v, indent, nested, level + 1)
                dumped_indexes[i] = true
        end
        for k, v in pairs(o) do
@@ -144,7 +143,7 @@ function dump(o, indent, nested, level)
                                k = "["..dump(k, indent, nested, level + 1).."]"
                        end
                        v = dump(v, indent, nested, level + 1)
-                       table_insert(t, k.." = "..v)
+                       t[#t + 1] = k.." = "..v
                end
        end
        nested[o] = nil
@@ -159,6 +158,7 @@ function dump(o, indent, nested, level)
        return "{"..table.concat(t, ", ").."}"
 end
 
+--------------------------------------------------------------------------------
 function string.split(str, delim, include_empty, max_splits, sep_is_pattern)
        delim = delim or ","
        max_splits = max_splits or -1
@@ -176,7 +176,7 @@ function string.split(str, delim, include_empty, max_splits, sep_is_pattern)
                local s = string_sub(str, pos, np - 1)
                if include_empty or (s ~= "") then
                        max_splits = max_splits - 1
-                       table_insert(items, s)
+                       items[#items + 1] = s
                end
                pos = npe + 1
        until (max_splits == 0) or (pos > (len + 1))
@@ -184,16 +184,30 @@ function string.split(str, delim, include_empty, max_splits, sep_is_pattern)
 end
 
 --------------------------------------------------------------------------------
-function file_exists(filename)
-       local f = io.open(filename, "r")
-       if f==nil then
-               return false
-       else
-               f:close()
-               return true
+function table.indexof(list, val)
+       for i, v in ipairs(list) do
+               if v == val then
+                       return i
+               end
        end
+       return -1
 end
 
+assert(table.indexof({"foo", "bar"}, "foo") == 1)
+assert(table.indexof({"foo", "bar"}, "baz") == -1)
+
+--------------------------------------------------------------------------------
+if INIT ~= "client" then
+       function file_exists(filename)
+               local f = io.open(filename, "r")
+               if f == nil then
+                       return false
+               else
+                       f:close()
+                       return true
+               end
+       end
+end
 --------------------------------------------------------------------------------
 function string:trim()
        return (self:gsub("^%s*(.-)%s*$", "%1"))
@@ -294,59 +308,25 @@ function core.formspec_escape(text)
 end
 
 
-function core.splittext(text,charlimit)
-       local retval = {}
-
-       local current_idx = 1
-
-       local start,stop = string_find(text, " ", current_idx)
-       local nl_start,nl_stop = string_find(text, "\n", current_idx)
-       local gotnewline = false
-       if nl_start ~= nil and (start == nil or nl_start < start) then
-               start = nl_start
-               stop = nl_stop
-               gotnewline = true
+function core.wrap_text(text, max_length, as_table)
+       local result = {}
+       local line = {}
+       if #text <= max_length then
+               return as_table and {text} or text
        end
-       local last_line = ""
-       while start ~= nil do
-               if string.len(last_line) + (stop-start) > charlimit then
-                       table_insert(retval, last_line)
-                       last_line = ""
-               end
-
-               if last_line ~= "" then
-                       last_line = last_line .. " "
-               end
-
-               last_line = last_line .. string_sub(text, current_idx, stop - 1)
 
-               if gotnewline then
-                       table_insert(retval, last_line)
-                       last_line = ""
-                       gotnewline = false
+       for word in text:gmatch('%S+') do
+               local cur_length = #table.concat(line, ' ')
+               if cur_length > 0 and cur_length + #word + 1 >= max_length then
+                       -- word wouldn't fit on current line, move to next line
+                       table.insert(result, table.concat(line, ' '))
+                       line = {}
                end
-               current_idx = stop+1
-
-               start,stop = string_find(text, " ", current_idx)
-               nl_start,nl_stop = string_find(text, "\n", current_idx)
-
-               if nl_start ~= nil and (start == nil or nl_start < start) then
-                       start = nl_start
-                       stop = nl_stop
-                       gotnewline = true
-               end
-       end
-
-       --add last part of text
-       if string.len(last_line) + (string.len(text) - current_idx) > charlimit then
-                       table_insert(retval, last_line)
-                       table_insert(retval, string_sub(text, current_idx))
-       else
-               last_line = last_line .. " " .. string_sub(text, current_idx)
-               table_insert(retval, last_line)
+               table.insert(line, word)
        end
 
-       return retval
+       table.insert(result, table.concat(line, ' '))
+       return as_table and result or table.concat(result, '\n')
 end
 
 --------------------------------------------------------------------------------
@@ -369,8 +349,7 @@ if INIT == "game" then
                                        itemstack, pointed_thing)
                        return
                end
-               local pitch = placer:get_look_pitch()
-               local fdir = core.dir_to_facedir(placer:get_look_dir())
+               local fdir = placer and core.dir_to_facedir(placer:get_look_dir()) or 0
                local wield_name = itemstack:get_name()
 
                local above = pointed_thing.above
@@ -390,9 +369,9 @@ if INIT == "game" then
                        iswall = false
                end
 
-               if core.is_protected(pos, placer:get_player_name()) then
-                       core.record_protection_violation(pos,
-                                       placer:get_player_name())
+               local name = placer and placer:get_player_name() or ""
+               if core.is_protected(pos, name) then
+                       core.record_protection_violation(pos, name)
                        return
                end
 
@@ -416,14 +395,14 @@ if INIT == "game" then
 
                if iswall then
                        core.set_node(pos, {name = wield_name,
-                                       param2 = dirs1[fdir+1]})
+                                       param2 = dirs1[fdir + 1]})
                elseif isceiling then
                        if orient_flags.force_facedir then
                                core.set_node(pos, {name = wield_name,
                                                param2 = 20})
                        else
                                core.set_node(pos, {name = wield_name,
-                                               param2 = dirs2[fdir+1]})
+                                               param2 = dirs2[fdir + 1]})
                        end
                else -- place right side up
                        if orient_flags.force_facedir then
@@ -446,12 +425,18 @@ if INIT == "game" then
 --Wrapper for rotate_and_place() to check for sneak and assume Creative mode
 --implies infinite stacks when performing a 6d rotation.
 --------------------------------------------------------------------------------
-
+       local creative_mode_cache = core.settings:get_bool("creative_mode")
+       local function is_creative(name)
+               return creative_mode_cache or
+                               core.check_player_privs(name, {creative = true})
+       end
 
        core.rotate_node = function(itemstack, placer, pointed_thing)
+               local name = placer and placer:get_player_name() or ""
+               local invert_wall = placer and placer:get_player_control().sneak or false
                core.rotate_and_place(itemstack, placer, pointed_thing,
-                               core.setting_getbool("creative_mode"),
-                               {invert_wall = placer:get_player_control().sneak})
+                               is_creative(name),
+                               {invert_wall = invert_wall})
                return itemstack
        end
 end
@@ -498,6 +483,12 @@ function core.explode_scrollbar_event(evt)
        return retval
 end
 
+--------------------------------------------------------------------------------
+function core.rgba(r, g, b, a)
+       return a and string.format("#%02X%02X%02X%02X", r, g, b, a) or
+                       string.format("#%02X%02X%02X", r, g, b)
+end
+
 --------------------------------------------------------------------------------
 function core.pos_to_string(pos, decimal_places)
        local x = pos.x
@@ -540,6 +531,36 @@ assert(core.string_to_pos("10.0, 5, -2").x == 10)
 assert(core.string_to_pos("( 10.0, 5, -2)").z == -2)
 assert(core.string_to_pos("asd, 5, -2)") == nil)
 
+--------------------------------------------------------------------------------
+function core.string_to_area(value)
+       local p1, p2 = unpack(value:split(") ("))
+       if p1 == nil or p2 == nil then
+               return nil
+       end
+
+       p1 = core.string_to_pos(p1 .. ")")
+       p2 = core.string_to_pos("(" .. p2)
+       if p1 == nil or p2 == nil then
+               return nil
+       end
+
+       return p1, p2
+end
+
+local function test_string_to_area()
+       local p1, p2 = core.string_to_area("(10.0, 5, -2) (  30.2,   4, -12.53)")
+       assert(p1.x == 10.0 and p1.y == 5 and p1.z == -2)
+       assert(p2.x == 30.2 and p2.y == 4 and p2.z == -12.53)
+
+       p1, p2 = core.string_to_area("(10.0, 5, -2  30.2,   4, -12.53")
+       assert(p1 == nil and p2 == nil)
+
+       p1, p2 = core.string_to_area("(10.0, 5,) -2  fgdf2,   4, -12.53")
+       assert(p1 == nil and p2 == nil)
+end
+
+test_string_to_area()
+
 --------------------------------------------------------------------------------
 function table.copy(t, seen)
        local n = {}
@@ -564,7 +585,9 @@ if INIT == "mainmenu" then
 
                return nil
        end
+end
 
+if INIT == "client" or INIT == "mainmenu" then
        function fgettext_ne(text, ...)
                text = core.gettext(text)
                local arg = {n=select('#', ...), ...}
@@ -595,3 +618,133 @@ if INIT == "mainmenu" then
        end
 end
 
+local ESCAPE_CHAR = string.char(0x1b)
+
+function core.get_color_escape_sequence(color)
+       return ESCAPE_CHAR .. "(c@" .. color .. ")"
+end
+
+function core.get_background_escape_sequence(color)
+       return ESCAPE_CHAR .. "(b@" .. color .. ")"
+end
+
+function core.colorize(color, message)
+       local lines = tostring(message):split("\n", true)
+       local color_code = core.get_color_escape_sequence(color)
+
+       for i, line in ipairs(lines) do
+               lines[i] = color_code .. line
+       end
+
+       return table.concat(lines, "\n") .. core.get_color_escape_sequence("#ffffff")
+end
+
+
+function core.strip_foreground_colors(str)
+       return (str:gsub(ESCAPE_CHAR .. "%(c@[^)]+%)", ""))
+end
+
+function core.strip_background_colors(str)
+       return (str:gsub(ESCAPE_CHAR .. "%(b@[^)]+%)", ""))
+end
+
+function core.strip_colors(str)
+       return (str:gsub(ESCAPE_CHAR .. "%([bc]@[^)]+%)", ""))
+end
+
+function core.translate(textdomain, str, ...)
+       local start_seq
+       if textdomain == "" then
+               start_seq = ESCAPE_CHAR .. "T"
+       else
+               start_seq = ESCAPE_CHAR .. "(T@" .. textdomain .. ")"
+       end
+       local arg = {n=select('#', ...), ...}
+       local end_seq = ESCAPE_CHAR .. "E"
+       local arg_index = 1
+       local translated = str:gsub("@(.)", function(matched)
+               local c = string.byte(matched)
+               if string.byte("1") <= c and c <= string.byte("9") then
+                       local a = c - string.byte("0")
+                       if a ~= arg_index then
+                               error("Escape sequences in string given to core.translate " ..
+                                       "are not in the correct order: got @" .. matched ..
+                                       "but expected @" .. tostring(arg_index))
+                       end
+                       if a > arg.n then
+                               error("Not enough arguments provided to core.translate")
+                       end
+                       arg_index = arg_index + 1
+                       return ESCAPE_CHAR .. "F" .. arg[a] .. ESCAPE_CHAR .. "E"
+               elseif matched == "n" then
+                       return "\n"
+               else
+                       return matched
+               end
+       end)
+       if arg_index < arg.n + 1 then
+               error("Too many arguments provided to core.translate")
+       end
+       return start_seq .. translated .. end_seq
+end
+
+function core.get_translator(textdomain)
+       return function(str, ...) return core.translate(textdomain or "", str, ...) end
+end
+
+--------------------------------------------------------------------------------
+-- Returns the exact coordinate of a pointed surface
+--------------------------------------------------------------------------------
+function core.pointed_thing_to_face_pos(placer, pointed_thing)
+       local eye_offset_first = placer:get_eye_offset()
+       local node_pos = pointed_thing.under
+       local camera_pos = placer:get_pos()
+       local pos_off = vector.multiply(
+                       vector.subtract(pointed_thing.above, node_pos), 0.5)
+       local look_dir = placer:get_look_dir()
+       local offset, nc
+       local oc = {}
+
+       for c, v in pairs(pos_off) do
+               if nc or v == 0 then
+                       oc[#oc + 1] = c
+               else
+                       offset = v
+                       nc = c
+               end
+       end
+
+       local fine_pos = {[nc] = node_pos[nc] + offset}
+       camera_pos.y = camera_pos.y + 1.625 + eye_offset_first.y / 10
+       local f = (node_pos[nc] + offset - camera_pos[nc]) / look_dir[nc]
+
+       for i = 1, #oc do
+               fine_pos[oc[i]] = camera_pos[oc[i]] + look_dir[oc[i]] * f
+       end
+       return fine_pos
+end
+
+function core.string_to_privs(str, delim)
+       assert(type(str) == "string")
+       delim = delim or ','
+       local privs = {}
+       for _, priv in pairs(string.split(str, delim)) do
+               privs[priv:trim()] = true
+       end
+       return privs
+end
+
+function core.privs_to_string(privs, delim)
+       assert(type(privs) == "table")
+       delim = delim or ','
+       local list = {}
+       for priv, bool in pairs(privs) do
+               if bool then
+                       list[#list + 1] = priv
+               end
+       end
+       return table.concat(list, delim)
+end
+
+assert(core.string_to_privs("a,b").b == true)
+assert(core.privs_to_string({a=true,b=true}) == "a,b")