* Improve positioner types; allow overriding xAlign and yAlign
* More type improvements; pass in Chart as third parameter
* Expose chart as part of TooltipModel
I initially passed the Chart element as the third parameter to the positioner; however, Scale and LegendElement elements expose `this.chart`, and sample code for positioners used `this._chart`, so documenting the chart member and giving it a public name seems to make more sense.
* Update documentation
* Fix documentation
* Fix issues from code review
* Fix cleaning up metasets
I believe it's a mistake to only delete the metaset if it has a valid controller; see f191f2f5 for where this behavior was introduced.
This is a minimal fix for #9653; as discussed there, it may also be worth updating `updateHoverStyle`.
As of #7030, `this._metasets` should always be defined, so checking whether it's undefined is no longer necessary.
* Add a test covering metaset behavior
* Add a regression test for #9653; fix `toHaveSize` usage
* Fix test failure
* Update plugin to use it's own tooltip context
* Scriptable tooltip option types
* Tests
* Update types to use UnionToIntersection
* Update TooltipItem to use UnionToIntersection
* Create standardized text render method
* Document renderText options and enable configurable decoration width
* Add tests for font rendering
* Split color definition to it's own file
* renderText supports setting styles
* Mock context needs to track textBaseline
* renderText can set textAlign and textBaseline
* renderText does not mutate the context + translate/rotate
* Explicitly set the text decoration style
* Move useStroke logic into renderText
* Cartesian scale: Update computeLabelItems to avoid duplicate allocations
* Allow the tooltip to get closer to the canvas edge
Closer to the top & bottom by considering (height/2) instead of height.
* Update missing options in TS types
* Remove unneeded brackets
Provide APIs to set active (hovered) and tooltip elements.
Chart.setActiveElements will set the hovered items.
Chart.tooltip.setActiveElements will set the tooltip items.
