### Widget text overhaul
#### Current
- Numbers and text overlap
- Combo boxes truncate the value before the label
#### Proposed
**By default, widgets will now truncate their labels before their
values.**
https://github.com/user-attachments/assets/296ea5ab-d2ff-44f2-9139-5d97789e4f12
- Changes the way widget text is rendered, calculated, and truncated
- Truncation now applies in a standard way to the following widgets:
- Text
- Combo
- Number
- Centralises widget draw routines in base class
### Config
```ts
// Truncate **both** widgets and labels evenly
LiteGraph.truncateWidgetTextEvenly = true
// Swap the default from truncating labels before values, to truncating values first (restores legacy behaviour)
// truncateWidgetTextEvenly **must** be `false`.
LiteGraph.truncateWidgetValuesFirst = true
```
### API / interfaces
- Adds rich `Rectangle` concrete impl., with many methods and helpful
accessors (e.g. `right`, `bottom`)
- Actually _improves_ performance due to switch from Float32Array to
Float64Array
- Impact vs plain Float64Array was not detectable outside of a 2M+
instantiation-loop with random data
- Lazy `pos` & `size` `subarray` properties
- Adds `ReadOnlySize`
- Adds higher-level text draw functions to abstract the nitty gritty in
a performant way (binary search)
- Resolves Comfy-Org/ComfyUI_frontend/issues/457
- Checks if `e.preventDefault()` has been called for all cancellable
LinkConnector callbacks
- Sets `cancelable: true` on dispatched events
- Dedupes canvas pointer calls
- Splits link connect logic out of `LinkConnector` to individual
`RenderLink` classes
- Add support for connecting / reconnecting reroutes in various
configurations
- Adds support for moving existing floating links from outputs / inputs
- Fixes numerous corruption issues when reconnecting reroutes / moving
links
- Tests in separate PR #816
### LinkConnector
Replaces the minimal-change effort of `connecting_links` with a more
reliable implementation.
- Subscribable, event-based API
- Uses browser-standard `e.preventDefault()` to cancel `before-*` events
- Uses standard `state` POJO - can be proxied without issue
- Structures code and separates concerns out of `LGraphCanvas`
- Link creation calls can now be made from anywhere, without the need
for a rewrite
- New canvas sub-components now live in `src/canvas/`
### Rendering
- Skips link segments by setting a `_dragging` bool flag on the LLink or
Reroute
- Moves some previously nested code to event listeners, configured in
the `LGraphCanvas` constructor
### Deprecation
`LGraphCanvas.connecting_links` is now deprecated and will later be
removed.
Until it is removed, to prevent breaking extensions it will continue to
be set and cleared by a legacy callback. The contents of this property
are ignored; code search revealed no exentsions actually modifying the
array.
