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--[[
font_api mod for Minetest - Library to add font display capability
to display_api mod.
(c) Pierre-Yves Rollo
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
--]]
local modname = minetest.get_current_modname()
-- Context management functions (surely many improvements to do)
local contexts = {}
local function get_player_name(player)
if type(player) == 'string' then return player end
if type(player) == 'userdata' and player.get_player_name then
return player:get_player_name()
end
minetest.log('warning', '['..modname..'] get_player_name could not identify player.')
end
minetest.register_on_leaveplayer(function(player)
local playername = get_player_name(player)
if playername then contexts[playername] = nil end
end)
local function new_context(player, context)
local playername = get_player_name(player)
if playername then
contexts[playername] = context
contexts[playername].playername = playername
return contexts[playername]
end
end
local function get_context(player)
local playername = get_player_name(player)
if playername then
if contexts[playername] then
return contexts[playername]
else
minetest.log('warning', '['..modname..'] Context not found for player "'..playername..'"')
end
end
end
local function update_context(player, changes)
local playername = get_player_name(player)
if playername then
if not contexts[playername] then
contexts[playername] = { playername = playername }
end
for key, value in pairs(changes) do
contexts[playername][key] = value
end
end
end
-- Show node formspec functions
local function show_node_formspec(player, pos)
local meta = minetest.get_meta(pos)
local playername = get_player_name(player)
-- Decontextualize formspec
local fs = meta:get_string('formspec')
-- Change context and currrent_name references to nodemeta references
fs = fs:gsub("current_name", "nodemeta:"..pos.x..","..pos.y..","..pos.z)
fs = fs:gsub("context", "nodemeta:"..pos.x..","..pos.y..","..pos.z)
-- Change all ${} to their corresponding metadata values
local s, e
repeat
s, e = fs:find('%${.*}')
if s and e then
fs = fs:sub(1, s-1)..
minetest.formspec_escape(meta:get_string(fs:sub(s+2,e-1)))..
fs:sub(e+1)
end
until s == nil
-- Find node on_receive_fields
local ndef = minetest.registered_nodes[minetest.get_node(pos).name]
if ndef and ndef.on_receive_fields then
update_context(player, { on_receive_fields = ndef.on_receive_fields } )
end
update_context(player, { node_pos = pos } )
-- Show formspec
minetest.show_formspec(playername, modname..':context_formspec', fs)
end
minetest.register_on_player_receive_fields(function(player, formname, fields)
if formname == modname..':context_formspec' then
local context = get_context(player)
if context == nil then return end
if context.on_receive_fields then
context.on_receive_fields(context.pos, '', fields, player)
end
end
end)
-- Specific functions
local function font_list_prepare()
local list = {}
for name, _ in pairs(font_api.registered_fonts) do
list[#list+1] = name
end
table.sort(list)
return list
end
local function show_fs(player)
local context = get_context(player)
if context == nil then return end
local fonts = font_list_prepare()
local fs = 'size[4,'..(#fonts + 0.8)..']'
..default.gui_bg..default.gui_bg_img..default.gui_slots
..'button_exit[0,'..(#fonts)..';4,1;cancel;Cancel]'
for line = 1, #fonts do
local font = font_api.get_font(fonts[line])
fs = fs..'image[0.1,'..(line-0.9)..';4.5,0.8;'
..font:make_text_texture(font.name, font:get_height()*5,
font:get_height()*1.2, 1, "center", "top", "#fff")
..']button_exit[0,'..(line-1)..';4,1;font_'..font.name..';]'
end
minetest.show_formspec(context.playername, modname..':font_list', fs)
end
minetest.register_on_player_receive_fields(function(player, formname, fields)
if formname == modname..':font_list' then
local context = get_context(player)
if context == nil then return end
if fields.quit == 'true' then
for name, _ in pairs(font_api.registered_fonts) do
if fields['font_'..name] then
local meta = minetest.get_meta(context.pos)
meta:set_string("font", name)
display_api.update_entities(context.pos)
end
end
-- Using after to avoid the "double close" bug
minetest.after(0, show_node_formspec, player, context.pos)
end
end
end)
function font_api.show_font_list(player, pos)
new_context(player, { pos = pos })
show_fs(player)
end
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