Pagination#canAdvance and Pagination#canBack always true

[nicolube]

Is there an existing issue for this?

• I have searched the existing issues

🐛 Describe the bug

Hello I have an Kotlin extension function looking like this:

    @JvmStatic
    fun RenderContext.pagination(state: State<Pagination>, fallBack: ViewItems = ViewItems.MENU_PLACEHOLDER) {

        "NP".forEach { layoutSlot(it, fallBack.get()) }

        layoutSlot('N', ViewItems.NEXT_PAGE.get()).displayIf { c -> state.get(c).canAdvance() }
            .updateOnStateChange(state)
            .onClick { context ->
                val pagination = state.get(context)
                pagination.advance()
                CustomSounds.MENU_CLICK.playSound(this.player)
            }
        layoutSlot('P').displayIf { c -> state.get(c).canBack() }
            .updateOnStateChange(state)
            .onClick { context ->
                val pagination = state.get(context)
                pagination.back()
                CustomSounds.MENU_CLICK.playSound(this.player)
            }
    }

It adds next and Previous buttons to a layout, my issue is here that they are always added, no matter of there is just 1 or 50 Items in the Pennington.

This Problem only exists with all computedPagintons

✔️ Expected behavior

Well, that the items are not displayed if there is no next or previous site.

👣 Steps to Reproduce

No response

💻 Platform

• Bukkit
• Sponge
• Other

⭐ Server Version

Paper version 1.21.1-122-master@4430e96 (2024-10-12T21:18:42Z) (Implementing API version 1.21.1-R0.1-SNAPSHOT)

📚 Library Version

3.0.11

✍️ Additional context

No response

[goncalodelima]

Do it this way until this is fixed:

render.layoutSlot('<', back)
. updateOnStateChange(paginationState)
.displayIf(() -> pagination.currentPageIndex() != 0)
.onClick(pagination::back);

render.layoutSlot('>', next)
. updateOnStateChange(paginationState)
.displayIf(() -> pagination.currentPageIndex() < pagination.lastPageIndex())
.onClick(pagination::advance);