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Books: Split text per page relatively to number of lines

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kilbith authored and paramat committed Apr 14, 2016
1 parent 7be0089 commit 082b36d3e7abda59f1c0bd1160552271174841b2
Showing with 17 additions and 9 deletions.
  1. +17 −9 mods/default/craftitems.lua
@@ -11,21 +11,30 @@ minetest.register_craftitem("default:paper", {
inventory_image = "default_paper.png",
})

local lpp = 14 -- Lines per book's page
local function book_on_use(itemstack, user)
local player_name = user:get_player_name()
local data = minetest.deserialize(itemstack:get_metadata())
local formspec, title, text, owner = "", "", "", player_name
local page, page_max, cpp = 1, 1, 650
local page, page_max, lines, string = 1, 1, {}, ""

if data then
title = data.title
text = data.text
owner = data.owner

for str in (text .. "\n"):gmatch("([^\n]*)[\n]") do
lines[#lines+1] = str
end

if data.page then
page = data.page
page_max = data.page_max
cpp = data.chars_per_page

for i = ((lpp * page) - lpp) + 1, lpp * page do
if not lines[i] then break end
string = string .. lines[i] .. "\n"
end
end
end

@@ -44,8 +53,8 @@ local function book_on_use(itemstack, user)
"tablecolumns[color;text]" ..
"tableoptions[background=#00000000;highlight=#00000000;border=false]" ..
"table[0.4,0;7,0.5;title;#FFFF00," .. minetest.formspec_escape(title) .. "]" ..
"textarea[0.5,1.5;7.5,7;;" .. minetest.formspec_escape(text:sub(
(cpp * page) - cpp, cpp * page)) .. ";]" ..
"textarea[0.5,1.5;7.5,7;;" ..
minetest.formspec_escape(string ~= "" and string or text) .. ";]" ..
"button[2.4,7.6;0.8,0.8;book_prev;<]" ..
"label[3.2,7.7;Page " .. page .. " of " .. page_max .. "]" ..
"button[4.9,7.6;0.8,0.8;book_next;>]"
@@ -76,10 +85,9 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
if not data then data = {} end
data.title = fields.title
data.text = fields.text
data.text_len = fields.text:len()
data.text_len = #data.text
data.page = 1
data.chars_per_page = 650
data.page_max = math.ceil(data.text_len / data.chars_per_page)
data.page_max = math.ceil((#data.text:gsub("[^\n]", "") + 1) / lpp)
data.owner = player:get_player_name()
local data_str = minetest.serialize(data)

@@ -94,8 +102,6 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
stack:set_metadata(data_str)
end

player:set_wielded_item(stack)

elseif fields.book_next or fields.book_prev then
local data = minetest.deserialize(stack:get_metadata())
if not data.page then return end
@@ -116,6 +122,8 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
stack:set_metadata(data_str)
book_on_use(stack, player)
end

player:set_wielded_item(stack)
end)

minetest.register_craftitem("default:book", {

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