Free embedded views are view instances that are created
logically in the same was as views of a ViewContainer,
but their dom nodes are not attached.
BREAKING CHANGE:
- `Renderer.detachFreeHostView` was renamed to
`Renderer.detachFreeView`
- `DomRenderer.getHostElement()` was generalized into
`DomRenderer.getRootNodes()`
BREAKING CHANGE:
`AppViewManager.createInPlaceHostView` is replaced by
`AppViewManager.createRootHostView` (for bootstrap) and
`AppViewManager.createFreeHostView` (for imperative components).
The later creates new host elements that are not attached anywhere.
To attach them, use `DomRenderer.getHostElement(hostviewRef)`
to get the host element.
Closes#1920
The goal is to make implementing a renderer straight forward.
BREAKING_CHANGE:
- Renderer interface was redone / simplified.
- `DirectDomRenderer` was replaced by `DomRenderer`.
- `DirectDomRenderer.setImperativeComponentRootNodes` is replaced
by the following 2 steps:
1. `ViewManager.getComponentView(elementRef) -> ViewRef`
2. `DomRenderer.setComponentViewRootNodes(viewRef, rootNodes)`
- all `@View` annotations need to have a template, but the template
may be empty. Previously views that had a `renderer` property did
not have to have a `template`.
- `dynamicComponentLoader.loadIntoNewLocation` does no more allow
to pass an element, but requires a css selector.
Special syntax: `:document` can be used as prefix to search globally
on the document instead of in the provided parent view.
Part of #1675
