Books: Add support for multiple pages

diff --git a/mods/default/craftitems.lua b/mods/default/craftitems.lua
index 31d85c9bbccfab6ce92555cc9776b2edd5674fbd..fc52bc4261af65d3faa7210353db55f8f5f4d573 100644 (file)
--- a/mods/default/craftitems.lua
+++ b/mods/default/craftitems.lua
@@ -11,14 +11,22 @@ minetest.register_craftitem("default:paper", {
        inventory_image = "default_paper.png",
 })
 
-local function book_on_use(itemstack, user, pointed_thing)
+local function book_on_use(itemstack, user)
        local player_name = user:get_player_name()
        local data = minetest.deserialize(itemstack:get_metadata())
-       local title, text, owner = "", "", player_name
+       local formspec, title, text, text_len, page, page_max, cpp, owner =
+               "", "", "", 1, 1, 1, 1, player_name
+
        if data then
-               title, text, owner = data.title, data.text, data.owner
+               title = data.title
+               text = data.text
+               owner = data.owner
+               text_len = data.text_len
+               page = data.page
+               page_max = data.page_max
+               cpp = data.chars_per_page
        end
-       local formspec
+
        if owner == player_name then
                formspec = "size[8,8]" .. default.gui_bg ..
                        default.gui_bg_img ..
@@ -31,48 +39,79 @@ local function book_on_use(itemstack, user, pointed_thing)
                formspec = "size[8,8]" .. default.gui_bg ..
                        default.gui_bg_img ..
                        "label[0.5,0.5;by " .. owner .. "]" ..
-                       "label[0.5,0;" .. minetest.formspec_escape(title) .. "]" ..
-                       "textarea[0.5,1.5;7.5,7;text;;" ..
-                               minetest.formspec_escape(text) .. "]"
+                       "tablecolumns[color;text]" ..
+                       "tableoptions[background=#00000000;highlight=#00000000;border=false]" ..
+                       "table[0.4,0;4,0.5;title;#FFFF00," .. minetest.formspec_escape(title) .. "]"..
+                       "textarea[0.5,1.5;7.5,7;;".. minetest.formspec_escape(text:sub(
+                               (cpp * page) - cpp, cpp * page)) .. ";]" ..
+                       "button[4.6,0.2;0.8,0.8;book_prev;<]" ..
+                       "label[5.35,0.3;Page " .. page .. " of " .. page_max .. "]"..
+                       "button[7,0.2;0.8,0.8;book_next;>]"
        end
-       minetest.show_formspec(user:get_player_name(), "default:book", formspec)
+
+       minetest.show_formspec(player_name, "default:book", formspec)
 end
 
-minetest.register_on_player_receive_fields(function(player, form_name, fields)
-       if form_name ~= "default:book" or not fields.save or
-                       fields.title == "" or fields.text == "" then
-               return
-       end
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+       if formname ~= "default:book" then return end
        local inv = player:get_inventory()
        local stack = player:get_wielded_item()
-       local new_stack, data
-       if stack:get_name() ~= "default:book_written" then
-               local count = stack:get_count()
-               if count == 1 then
-                       stack:set_name("default:book_written")
+
+       if fields.save and fields.title ~= "" and fields.text ~= "" then
+               local new_stack, data
+               if stack:get_name() ~= "default:book_written" then
+                       local count = stack:get_count()
+                       if count == 1 then
+                               stack:set_name("default:book_written")
+                       else
+                               stack:set_count(count - 1)
+                               new_stack = ItemStack("default:book_written")
+                       end
                else
-                       stack:set_count(count - 1)
-                       new_stack = ItemStack("default:book_written")
+                       data = minetest.deserialize(stack:get_metadata())
                end
-       else
-               data = minetest.deserialize(stack:get_metadata())
-       end
-       if not data then data = {} end
-       data.title = fields.title
-       data.text = fields.text
-       data.owner = player:get_player_name()
-       local data_str = minetest.serialize(data)
-       if new_stack then
-               new_stack:set_metadata(data_str)
-               if inv:room_for_item("main", new_stack) then
-                       inv:add_item("main", new_stack)
+
+               if not data then data = {} end
+               data.title = fields.title
+               data.text = fields.text
+               data.text_len = fields.text:len()
+               data.page = 1
+               data.chars_per_page = 650
+               data.page_max = math.ceil(data.text_len / data.chars_per_page)
+               data.owner = player:get_player_name()
+               local data_str = minetest.serialize(data)
+
+               if new_stack then
+                       new_stack:set_metadata(data_str)
+                       if inv:room_for_item("main", new_stack) then
+                               inv:add_item("main", new_stack)
+                       else
+                               minetest.add_item(player:getpos(), new_stack)
+                       end
                else
-                       minetest.add_item(player:getpos(), new_stack)
+                       stack:set_metadata(data_str)
                end
-       else
+
+               player:set_wielded_item(stack)
+
+       elseif fields.book_next or fields.book_prev then
+               local data = minetest.deserialize(stack:get_metadata())
+               if fields.book_next then
+                       data.page = data.page + 1
+                       if data.page > data.page_max then
+                               data.page = 1
+                       end
+               else
+                       data.page = data.page - 1
+                       if data.page == 0 then
+                               data.page = data.page_max
+                       end
+               end
+
+               local data_str = minetest.serialize(data)
                stack:set_metadata(data_str)
+               book_on_use(stack, player)
        end
-       player:set_wielded_item(stack)
 end)
 
 minetest.register_craftitem("default:book", {