Vanilla GUI Border+ Functions

[WrexBG]

These are functions you may find useful when working with GUI's. It's just an easy way to add border, border with preset pattern, and fill or clear the inventory.

Some things to know beforehand:
- These are functions
- Required addons: none
- Tested on Minecraft 1.15.2 and Skript 2.4.1
- There are default values for the functions mention after each one
- It automatically gets the GUI size

★ Borders​

Spoiler: Border - 1 Color

function addGUIBorder(p: player, item: item = stained glass pane, itemName: string = "&7"):
    set {_menuSize} to (rows of {_p}'s current inventory)
    set {_slot} to 0
    loop 9 times: #Top
        set slot {_slot} of {_p}'s current inventory to {_item} named {_itemName}
        add 1 to {_slot}
    set {_slot} to 9
    loop {_menuSize}-2 times: #Sides
        set slot {_slot} of {_p}'s current inventory to {_item} named {_itemName}
        set slot {_slot}+8 of {_p}'s current inventory to {_item} named {_itemName}
        add 9 to {_slot}
    set {_slot} to ({_menuSize}-1)*9
    loop 9 times: #Bottom
        set slot {_slot} of {_p}'s current inventory to {_item} named {_itemName}
        add 1 to {_slot}

Usage:
addGUIBorder(player, red stained glass pane, "&7")
addGUIBorder(player) #Default values for the name is "&7" and for the item is a random colored glass pane

Spoiler: Border - 2 Colors

function addGUIBorder2(p: player, item: item = stained glass pane, item2: item = stained glass pane, itemName: string = "&7"):
    set {_menuSize} to (rows of {_p}'s current inventory)
    set {_slot} to 0
    loop 9 times: #Top
        set slot {_slot} of {_p}'s current inventory to {_item} named {_itemName}
        set slot {_slot} of {_p}'s current inventory to {_item2} named {_itemName} if floor({_slot}/2) != ({_slot}/2)
        add 1 to {_slot}
    set {_slot} to 9
    loop {_menuSize}-2 times: #Sides
        set slot {_slot} of {_p}'s current inventory to {_item} named {_itemName}
        set slot {_slot} of {_p}'s current inventory to {_item2} named {_itemName} if floor({_slot}/2) != ({_slot}/2)
        set slot {_slot}+8 of {_p}'s current inventory to {_item} named {_itemName}
        set slot {_slot}+8 of {_p}'s current inventory to {_item2} named {_itemName} if floor(({_slot}+8)/2) != (({_slot}+8)/2)
        add 9 to {_slot}
    set {_slot} to ({_menuSize}-1)*9
    loop 9 times: #Bottom
        set slot {_slot} of {_p}'s current inventory to {_item} named {_itemName}
        set slot {_slot} of {_p}'s current inventory to {_item2} named {_itemName} if floor({_slot}/2) != ({_slot}/2)
        add 1 to {_slot}

Note: A GUI with odd number of rows is recommended
Usage:
addGUIBorder2(player, red stained glass pane, orange stained glass pane, "&7")
addGUIBorder2(player) #Default values for the name is "&7" and for both items is a random colored glass pane

★ Other (Misc)​

Spoiler: Fill GUI

function fillGUI(p: player, item: item = light gray stained glass pane, itemName: string = "&7", keepItems: boolean = true):
    set {_menuSize} to (rows of {_p}'s current inventory)
    set {_slot} to 0
    loop 9*{_menuSize} times:
        if {_keepItems} is true:
            set slot {_slot} of {_p}'s current inventory to {_item} named {_itemName} if slot {_slot} of {_p}'s current inventory is air
        else:
            set slot {_slot} of {_p}'s current inventory to {_item} named {_itemName}
        add 1 to {_slot}

Usage:
fillGUI(player, white stained glass pane, "&7", false)
fillGUI(player) #Default values for the name is "&7", for the item is light gray glass pane, and whether to keep or overwrite items in the GUI: true(keep). Setting the last value or false will overwrite

Spoiler: Clear GUI

function clearGUI(p: player):
    delete all items in {_p}'s current inventory

Usage:
clearGUI(player)

This is work I felt like sharing. If you are looking for something simpler but more efficient I strongly recommend the following function by Blue:

Spoiler

function border(size: integer) :: integers:
  stop if {_size} is 1 or 2
  add (integers between 0 and 8) to {_r::*}
  add (integers between ({_size}-1)*9 and ({_size}-1)*9+8) to {_r::*}
  loop integers from 1 to {_size}:
   add loop-value*9 to {_r::*} if {_r::*} doesn't contain loop-value*9
   add loop-value*9+8 to {_r::*} if {_r::*} doesn't contain loop-value*9+8
  return {_r::*}

Usage:

set {_i} to chest inventory with 3 rows
set slots border(3) of {_i} to red wool
open {_i} to player