builtin/client/death_formspec.lua


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-- CSM death formspec. Only used when clientside modding is enabled, otherwise
-- handled by the engine.

core.register_on_death(function()
	core.display_chat_message("You died.")
	local formspec = "size[11,5.5]bgcolor[#320000b4;true]" ..
		"label[4.85,1.35;" .. fgettext("You died") ..
		"]button_exit[4,3;3,0.5;btn_respawn;".. /*
Minetestss="hl str">"Respawn") .."]"
	core.show_formspec("bultin:death", formspec)
end)

core.register_on_formspec_input(function(formname, fields)
	if formname == "bultin:death" then
		core.send_respawn()
	end
end)
-- Minetest: builtin/misc_helpers.lua

--------------------------------------------------------------------------------
-- Localize functions to avoid table lookups (better performance).
local string_sub, string_find = string.sub, string.find

--------------------------------------------------------------------------------
function basic_dump(o)
	local tp = type(o)
	if tp == "number" then
		return tostring(o)
	elseif tp == "string" then
		return string.format("%q", o)
	elseif tp == "boolean" then
		return tostring(o)
	elseif tp == "nil" then
		return "nil"
	-- Uncomment for full function dumping support.
	-- Not currently enabled because bytecode isn't very human-readable and
	-- dump's output is intended for humans.
	--elseif tp == "function" then
	--	return string.format("loadstring(%q)", string.dump(o))
	else
		return string.format("<%s>", tp)
	end
end

local keywords = {
	["and"] = true,
	["break"] = true,
	["do"] = true,
	["else"] = true,
	["elseif"] = true,
	["end"] = true,
	["false"] = true,
	["for"] = true,
	["function"] = true,
	["goto"] = true,  -- Lua 5.2
	["if"] = true,
	["in"] = true,
	["local"] = true,
	["nil"] = true,
	["not"] = true,
	["or"] = true,
	["repeat"] = true,
	["return"] = true,
	["then"] = true,
	["true"] = true,
	["until"] = true,
	["while"] = true,
}
local function is_valid_identifier(str)
	if not str:find("^[a-zA-Z_][a-zA-Z0-9_]*$") or keywords[str] then
		return false
	end
	return true
end

--------------------------------------------------------------------------------
-- Dumps values in a line-per-value format.
-- For example, {test = {"Testing..."}} becomes:
--   _["test"] = {}
--   _["test"][1] = "Testing..."
-- This handles tables as keys and circular references properly.
-- It also handles multiple references well, writing the table only once.
-- The dumped argument is internal-only.

function dump2(o, name, dumped)
	name = name or "_"
	-- "dumped" is used to keep track of serialized tables to handle
	-- multiple references and circular tables properly.
	-- It only contains tables as keys.  The value is the name that
	-- the table has in the dump, eg:
	-- {x = {"y"}} -> dumped[{"y"}] = '_["x"]'
	dumped = dumped or {}
	if type(o) ~= "table" then
		return string.format("%s = %s\n", name, basic_dump(o))
	end
	if dumped[o] then
		return string.format("%s = %s\n", name, dumped[o])
	end
	dumped[o] = name
	-- This contains a list of strings to be concatenated later (because
	-- Lua is slow at individual concatenation).
	local t = {}
	for k, v in pairs(o) do
		local keyStr
		if type(k) == "table" then
			if dumped[k] then
				keyStr = dumped[k]
			else
				-- Key tables don't have a name, so use one of
				-- the form _G["table: 0xFFFFFFF"]
				keyStr = string.format("_G[%q]", tostring(k))
				-- Dump key table
				t[#t + 1] = dump2(k, keyStr, dumped)
			end
		else
			keyStr = basic_dump(k)
		end
		local vname = string.format("%s[%s]", name, keyStr)
		t[#t + 1] = dump2(v, vname, dumped)
	end
	return string.format("%s = {}\n%s", name, table.concat(t))
end

--------------------------------------------------------------------------------
-- This dumps values in a one-statement format.
-- For example, {test = {"Testing..."}} becomes:
-- [[{
-- 	test = {
-- 		"Testing..."
-- 	}
-- }]]
-- This supports tables as keys, but not circular references.
-- It performs poorly with multiple references as it writes out the full
-- table each time.
-- The indent field specifies a indentation string, it defaults to a tab.
-- Use the empty string to disable indentation.
-- The dumped and level arguments are internal-only.

function dump(o, indent, nested, level)
	if type(o) ~= "table" then
		return basic_dump(o)
	end
	-- Contains table -> true/nil of currently nested tables
	nested = nested or {}
	if nested[o] then
		return "<circular reference>"
	end
	nested[o] = true
	indent = indent or "\t"
	level = level or 1
	local t = {}
	local dumped_indexes = {}
	for i, v in ipairs(o) do
		t[#t + 1] = dump(v, indent, nested, level + 1)
		dumped_indexes[i] = true
	end
	for k, v in pairs(o) do
		if not dumped_indexes[k] then
			if type(k) ~= "string" or not is_valid_identifier(k) then
				k = "["..dump(k, indent, nested, level + 1).."]"
			end
			v = dump(v, indent, nested, level + 1)
			t[#t + 1] = k.." = "..v
		end
	end
	nested[o] = nil
	if indent ~= "" then
		local indent_str = "\n"..string.rep(indent, level)
		local end_indent_str = "\n"..string.rep(indent, level - 1)
		return string.format("{%s%s%s}",
				indent_str,
				table.concat(t, ","..indent_str),
				end_indent_str)
	end
	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
	local items = {}
	local pos, len, seplen = 1, #str, #delim
	local plain = not sep_is_pattern
	max_splits = max_splits + 1
	repeat
		local np, npe = string_find(str, delim, pos, plain)
		np, npe = (np or (len+1)), (npe or (len+1))
		if (not np) or (max_splits == 1) then
			np = len + 1
			npe = np
		end
		local s = string_sub(str, pos, np - 1)
		if include_empty or (s ~= "") then
			max_splits = max_splits - 1
			items[#items + 1] = s
		end
		pos = npe + 1
	until (max_splits == 0) or (pos > (len + 1))
	return items
end

--------------------------------------------------------------------------------
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"))
end

assert(string.trim("\n \t\tfoo bar\t ") == "foo bar")

--------------------------------------------------------------------------------
function math.hypot(x, y)
	local t
	x = math.abs(x)
	y = math.abs(y)
	t = math.min(x, y)
	x = math.max(x, y)
	if x == 0 then return 0 end
	t = t / x
	return x * math.sqrt(1 + t * t)
end

--------------------------------------------------------------------------------
function math.sign(x, tolerance)
	tolerance = tolerance or 0
	if x > tolerance then
		return 1
	elseif x < -tolerance then
		return -1
	end
	return 0
end

--------------------------------------------------------------------------------
function get_last_folder(text,count)
	local parts = text:split(DIR_DELIM)

	if count == nil then
		return parts[#parts]
	end

	local retval = ""
	for i=1,count,1 do
		retval = retval .. parts[#parts - (count-i)] .. DIR_DELIM
	end

	return retval
end

--------------------------------------------------------------------------------
function cleanup_path(temppath)

	local parts = temppath:split("-")
	temppath = ""
	for i=1,#parts,1 do
		if temppath ~= "" then
			temppath = temppath .. "_"
		end
		temppath = temppath .. parts[i]
	end

	parts = temppath:split(".")
	temppath = ""
	for i=1,#parts,1 do
		if temppath ~= "" then
			temppath = temppath .. "_"
		end
		temppath = temppath .. parts[i]
	end

	parts = temppath:split("'")
	temppath = ""
	for i=1,#parts,1 do
		if temppath ~= "" then
			temppath = temppath .. ""
		end
		temppath = temppath .. parts[i]
	end

	parts = temppath:split(" ")
	temppath = ""
	for i=1,#parts,1 do
		if temppath ~= "" then
			temppath = temppath
		end
		temppath = temppath .. parts[i]
	end

	return temppath
end

function core.formspec_escape(text)
	if text ~= nil then
		text = string.gsub(text,"\\","\\\\")
		text = string.gsub(text,"%]","\\]")
		text = string.gsub(text,"%[","\\[")
		text = string.gsub(text,";","\\;")
		text = string.gsub(text,",","\\,")
	end
	return text
end


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

	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
		table.insert(line, word)
	end

	table.insert(result, table.concat(line, ' '))
	return as_table and result or table.concat(result, '\n')
end

--------------------------------------------------------------------------------

if INIT == "game" then
	local dirs1 = {9, 18, 7, 12}
	local dirs2 = {20, 23, 22, 21}

	function core.rotate_and_place(itemstack, placer, pointed_thing,
				infinitestacks, orient_flags)
		orient_flags = orient_flags or {}

		local unode = core.get_node_or_nil(pointed_thing.under)
		if not unode then
			return
		end
		local undef = core.registered_nodes[unode.name]
		if undef and undef.on_rightclick then
			return undef.on_rightclick(pointed_thing.under, unode, placer,
					itemstack, pointed_thing)
		end
		local fdir = placer and core.dir_to_facedir(placer:get_look_dir()) or 0

		local above = pointed_thing.above
		local under = pointed_thing.under
		local iswall = (above.y == under.y)
		local isceiling = not iswall and (above.y < under.y)

		if undef and undef.buildable_to then
			iswall = false
		end

		if orient_flags.force_floor then
			iswall = false
			isceiling = false
		elseif orient_flags.force_ceiling then
			iswall = false
			isceiling = true
		elseif orient_flags.force_wall then
			iswall = true
			isceiling = false
		elseif orient_flags.invert_wall then
			iswall = not iswall
		end

		local param2 = fdir
		if iswall then
			param2 = dirs1[fdir + 1]
		elseif isceiling then
			if orient_flags.force_facedir then
				cparam2 = 20
			else
				param2 = dirs2[fdir + 1]
			end
		else -- place right side up
			if orient_flags.force_facedir then
				param2 = 0
			end
		end

		local old_itemstack = ItemStack(itemstack)
		local new_itemstack, removed = core.item_place_node(
			itemstack, placer, pointed_thing, param2
		)
		return infinitestacks and old_itemstack or new_itemstack
	end


--------------------------------------------------------------------------------
--Wrapper for rotate_and_place() to check for sneak and assume Creative mode
--implies infinite stacks when performing a 6d rotation.
--------------------------------------------------------------------------------