Added trolley, new formspec, shift+click functionality

LICENSE

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+Copyright (c) 2013, Brett O'Donnell http://cornernote.github.io
+All rights reserved.
+ _____     _____ _____     _____ _____     _____
+|     |___| __  |   | |___| __  |   | |___|_   _|___
+|   --| . |    -| | | | -_|    -| | | | . | | | | -_|
+|_____|___|__|__|_|___|___|__|__|_|___|___| |_| |___|
+
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice, this
+  list of conditions and the following disclaimer in the documentation and/or
+  other materials provided with the distribution.
+
+* Neither the name of the organization nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+# Bags for Minetest
+
+Allows players to craft and attach bags to their inventory to increase player item storage capacity.
+
+
+## Features
+
+- Bags are available in inventory.
+- Multiple sized bags.
+- Bags store items permanently with the player
+
+
+## Resources
+
+- **[Documentation](http://cornernote.github.io/minetest-bags)**
+- **[GitHub Project](https://github.com/cornernote/minetest-bags)**
+- **[Minetest Forum](http://minetest.net/forum/viewtopic.php?id=3081)**
+
+
+## Support
+
+- Does this README need improvement?  Go ahead and [suggest a change](https://github.com/cornernote/minetest-bags/edit/master/README.md).
+- Found a bug, or need help using this project?  Check the [open issues](https://github.com/cornernote/minetest-bags/issues) or [create an issue](https://github.com/cornernote/minetest-bags/issues/new).
+
+
+## About
+
+This module is open source, so it's distributed freely. If you find it useful then I ask not for your wealth, but simply to spare your time to consider the world we share by watching [Earthlings](http://earthlings.com/), a multi-award winning film available to watch online for free. A must-see for anyone who wishes to make the world a better place.
+
+
+## Credits
+
+- Tonyka - created the amazing bag textures
+
+
+## License
+
+[BSD-3-Clause](https://raw.github.com/cornernote/minetest-bags/master/LICENSE), Copyright © 2013-2014 [Brett O'Donnell](http://cornernote.github.io/)

depends.txt

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+default
+inventory_plus

init.lua

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+--[[
+
+Bags for Minetest
+
+Copyright (c) 2012 cornernote, Brett O'Donnell <cornernote@gmail.com>
+Source Code: https://github.com/cornernote/minetest-bags
+License: BSD-3-Clause https://raw.github.com/cornernote/minetest-bags/master/LICENSE
+
+Edited by TenPlus1
+
+]]--
+
+
+local get_formspec = function(player, page)
+
+	if page == "bags" then
+
+		return "size[8,7.5]"
+			..default.gui_bg..default.gui_bg_img..default.gui_slots
+			.."list[current_player;main;0,3.5;8,4;]"
+			.."button[0,1;2,0.5;main;Back]"
+			.."button[2.5,1;1.3,0.5;bag1;Bag 1]"
+			.."button[2.5,2.2;1.3,0.5;bag2;Bag 2]"
+			.."button[5.2,1;1.3,0.5;bag3;Bag 3]"
+			.."button[5.2,2.2;1.3,0.5;bag4;Bag 4]"
+			.."list[detached:"..player:get_player_name().."_bags;bag1;3.8,.8;1,1;]"
+			.."list[detached:"..player:get_player_name().."_bags;bag2;3.8,2;1,1;]"
+			.."list[detached:"..player:get_player_name().."_bags;bag3;6.5,.8;1,1;]"
+			.."list[detached:"..player:get_player_name().."_bags;bag4;6.5,2;1,1;]"
+	end
+
+	for i = 1, 4 do
+
+		if page == "bag" .. i then
+
+			local image = player:get_inventory():get_stack("bag"
+				.. i, 1):get_definition().inventory_image
+--[[
+			return "size[8,9.5]"
+				..default.gui_bg..default.gui_bg_img..default.gui_slots
+				.."list[current_player;main;0,5.5;8,4;]"
+				.."button[6,0.2;2,0.5;main;Main]"
+				.."button[4,0.2;2,0.5;bags;Bags]"
+				.."image[0,0;1,1;" .. image .. "]"
+				.."list[current_player;bag" .. i .. "contents;0,1;8,4;]"
+--]]
+			return "size[8,9]"
+				..default.gui_bg..default.gui_bg_img..default.gui_slots
+				.."list[current_player;bag" .. i .. "contents;0,0;8,4;]"
+				.."button[0,4.2.2;2,0.5;main;Main]"
+				.."button[6,4.2.2;2,0.5;bags;Bags]"
+				.."image[3.5,4;1,1;" .. image .. "]"
+				.."list[current_player;main;0,5;8,4;]"
+				.. "listring[current_player;main]"
+				.. "listring[current_player;bag" .. i .. "contents]"
+		end
+	end
+end
+
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+
+	if fields.bags then
+		inventory_plus.set_inventory_formspec(player, get_formspec(player, "bags"))
+		return
+	end
+
+	for i = 1, 4 do
+
+		local page = "bag" .. i
+
+		if fields[page] then
+	
+			if player:get_inventory():get_stack(page, 1):get_definition().groups.bagslots == nil then
+				page = "bags"
+			end
+	
+			inventory_plus.set_inventory_formspec(player, get_formspec(player, page))
+	
+			return
+		end
+	end
+end)
+
+minetest.register_on_joinplayer(function(player)
+
+	inventory_plus.register_button(player,"bags","Bags")
+
+	local player_inv = player:get_inventory()
+	local bags_inv = minetest.create_detached_inventory(player:get_player_name().."_bags",{
+
+		on_put = function(inv, listname, index, stack, player)
+			player:get_inventory():set_stack(listname, index, stack)
+			player:get_inventory():set_size(listname.."contents", stack:get_definition().groups.bagslots)
+		end,
+
+		on_take = function(inv, listname, index, stack, player)
+			player:get_inventory():set_stack(listname, index, nil)
+		end,
+
+		allow_put = function(inv, listname, index, stack, player)
+			if stack:get_definition().groups.bagslots then
+				return 1
+			else
+				return 0
+			end
+		end,
+
+		allow_take = function(inv, listname, index, stack, player)
+			if player:get_inventory():is_empty(listname .. "contents") == true then
+				return stack:get_count()
+			else
+				return 0
+			end
+		end,
+
+		allow_move = function(inv, from_list, from_index, to_list, to_index, count, player)
+			return 0
+		end,
+	})
+
+	for i = 1, 4 do
+
+		local bag = "bag" .. i
+
+		player_inv:set_size(bag, 1)
+		bags_inv:set_size(bag, 1)
+		bags_inv:set_stack(bag, 1, player_inv:get_stack(bag, 1))
+	end
+end)
+
+-- register bags items
+
+minetest.register_craftitem("bags:small", {
+	description = "Small Bag",
+	inventory_image = "bags_small.png",
+	groups = {bagslots = 8},
+})
+
+minetest.register_craftitem("bags:medium", {
+	description = "Medium Bag",
+	inventory_image = "bags_medium.png",
+	groups = {bagslots = 16},
+})
+
+minetest.register_craftitem("bags:large", {
+	description = "Large Bag",
+	inventory_image = "bags_large.png",
+	groups = {bagslots = 24},
+})
+
+minetest.register_tool("bags:trolley", {
+	description = "Trolley",
+	inventory_image = "bags_trolley.png",
+	groups = {bagslots = 32},
+})
+
+-- register bag crafts
+
+minetest.register_craft({
+	output = "bags:small",
+	recipe = {
+		{"", "default:stick", ""},
+		{"mobs:leather", "mobs:leather", "mobs:leather"},
+		{"mobs:leather", "mobs:leather", "mobs:leather"},
+	},
+})
+
+minetest.register_craft({
+	output = "bags:medium",
+	recipe = {
+		{"", "default:stick", ""},
+		{"bags:small", "bags:small", "bags:small"},
+	},
+})
+
+minetest.register_craft({
+	output = "bags:large",
+	recipe = {
+		{"", "default:stick", ""},
+		{"bags:medium", "bags:medium", "bags:medium"},
+	},
+})
+
+minetest.register_craft({
+	output = "bags:trolley",
+	recipe = {
+		{"", "default:stick", ""},
+		{"bags:large", "bags:large", "bags:large"},
+	},
+})
+
+print ("[MOD] Bags loaded")