Various enhancements for books

[iojw]

This add various page and text editing controls to the Books screen:

Most of the controls are self-explanatory, but Copy generates a sample prefab based on the text you have in the book and adds it to your clipboard, similar to StructuralTemplates. No Gson, so I had to make use of some string manipulation for this. To implement the editing controls, I also had to make changes to some parts of the system, such as the page indexing and updating.

For the editing controls to appear, you need to possess an item with an EditBooksComponent in your inventory. I've added a Quill item, which contains this component. In the future, this could be expanded to other types of writing implements - coloured ink, permanent ink, limited ink, invisible ink. The possibilities are endless! 😄

Also added the properties readOnly and title to BookComponent. Titles are displayed on the cover of the book, along with a text about the current status (Editing, Reading or Read-only)

I'm not exactly sure about the title and I'm open to any suggestions. Is adding the property to BookComponent redundant? Maybe it would just be better to use the display name instead? Or should we just do away with the title altogether?

And various misc fixes:

• Buttons only appear when they are usable.
• Players receive some basic items when they spawn
• Cleaned up the old prefabs since they were outdated and the icons were not showing in hand

Let me know if there are problems with any of these 🙂.

Potential ideas to implement

• Add support for images in books
• Limit bookcases to books only (seems this was the intended behaviour but just never got implemented after the overhaul). I took a look at this and it seems the relevant code is in InventoryCell. Unlike before, there's no event sent when an item is transferred, so for this to be implemented, InventoryCell might need to be modified.
• Pagination. I think the problem with this might be the lack of space in the current interface. I was thinking about moving the two arrows to the left and right sides of the book and then adding the page numbers where they currently are.

[Cervator]

Works wonderfully! Spotted some minor issues, some of which predate your changes, I'm going to submit those as separate issues so they can be fixed whenever :-)

• You can place the cursor on the front book cover side when you have page one visible. Can't actually edit anything with the cursor there, so really low priority, more of a simple display issue. Maybe it is problematic to fix since on inner pages you need to be able to place the cursor there.
• The item placement on spawn take out any existing items (clears out the inventory) yet the new items added actually start in slots that were empty to begin with. Unsure if that's actually an inventory bug instead of anything related to Books. I think I'll take out the clearing since then you could enable Books as an additive module and it won't block any other content (like the regular items from Core)
• The module still ships with its own default font, yet trying to switch our to our standard Noto results in empty pages. Huh.

[iojw]

@Cervator Yeah, the cursor is something I found annoying but it's hard to fix given the all UIText widgets draw the cursor no matter what. We might need to modify UIText to be able to specify no cursor drawn to fix this.

As for the inventory, thanks for the fix, oversight on my part. But now that I think about it, I didn't really notice it since the behaviour wasn't consistent. Most of the times, when I started a new world with the Books module, I still received the Core Gameplay starting items. Hmm, might be because the order in which they're called differs each time.

Will fix the rest soon 🙂