New font selection formspec

fontform.lua

@@ -0,0 +1,171 @@
+--[[
+    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

init.lua

@@ -29,6 +29,7 @@ font_api.path = minetest.get_modpath(font_api.name)
 
 dofile(font_api.path.."/font.lua")
 dofile(font_api.path.."/registry.lua")
+dofile(font_api.path.."/fontform.lua")
 
 --- Standard on_display_update entity callback.
 -- Node should have a corresponding display_entity with size, resolution and
@@ -62,4 +63,3 @@ end
 
 -- Compatibility
 font_lib = font_api
-