Implements https://github.com/godotengine/godot-proposals/issues/4096
* Nodes can be marked unique to the scene in the editor (or via code).
* Unique nodes can be accessed via the **%** prefix at any point in the path. From that point in the path (depending on whether the scene of the path is), the unique node will be fetched.
* Implementation is very optimal, as these nodes are cached.
Using codespell 2.2-dev from current git.
Added `misc/scripts/codespell.sh` to make it easier to run it once in a
while and update the skip and ignore lists.
* Explain where it should be used, with examples.
* Clarify that it should _not_ be used everywhere, only where needed.
* Supersedes #57720
This PR is the result of the discussion that happened in a contractor meeting, and it attempts to clarify the intended use for this macro for other contributors.
As a personal note, It is my view that other approaches to using SNAME (like having a global or per class table of string names) are mere overengineering without any real benefit (performance remains the same, and usage of stringnames becomes more cumbersome. Additionally, there was not any significant amount of errors in name mismatching as a result of using strings since Godot was open sourced).
* Added explicit return type to the SNAME macro.
* Add some extra SNAME usages.
* Change some ClassDB methods to use const StringName & arguments.
* Cache the Window parent in Control because it's used in
is_layout_rtl(), which is called often.
* Only enable internal processing for viewports that need it.
* Change CanvasItem::group to be a StringName because it's only used as
that.
* Added a new macro SNAME() that constructs and caches a local stringname.
* Subsequent usages use the cached version.
* Since these use a global static variable, a second refcounter of static usages need to be kept for cleanup time.
* Replaced all theme usages by this new macro.
* Replace all signal emission usages by this new macro.
* Replace all call_deferred usages by this new macro.
This is part of ongoing work to optimize GUI and the editor.
Happy new year to the wonderful Godot community!
2020 has been a tough year for most of us personally, but a good year for
Godot development nonetheless with a huge amount of work done towards Godot
4.0 and great improvements backported to the long-lived 3.2 branch.
We've had close to 400 contributors to engine code this year, authoring near
7,000 commit! (And that's only for the `master` branch and for the engine code,
there's a lot more when counting docs, demos and other first-party repos.)
Here's to a great year 2021 for all Godot users 🎆
