For efficiency reasons we often put several different data types (`RNode`, `LView`, `LContainer`,
`StylingContext`) in same location in `LView`. This is because we don't want to pre-allocate
space
for it because the storage is sparse. This file contains utilities for dealing with such data
types.
How do we know what is stored at a given location in `LView`.
- `Array.isArray(value) === false` => `RNode` (The normal storage value)
- `Array.isArray(value) === true` => than the `value[0]` represents the wrapped value.
- `typeof value[TYPE] === 'object'` => `LView`
- This happens when we have a component at a given location
- `typeof value[TYPE] === 'number'` => `StylingContext`
- This happens when we have style/class binding at a given location.
- `typeof value[TYPE] === true` => `LContainer`
- This happens when we have `LContainer` binding at a given location.
NOTE: it is assumed that `Array.isArray` and `typeof` operations are very efficient.
PR Close#28947
Google3 detected circular references here, so splitting up this rather hodge-podge list of functions into slightly better organizational units.
PR Close#28382
- TView no longer stores childIndex
- LView now as CHILD_HEAD and CHILD_TAIL
TView used to store the head of the list, therefor all LViews had to have the same head, which is incorrect.
PR Close#28382
- Removes CONTAINER_INDEX
- LView[PARENT] now contains LContainer when necessary
- Removes now unused arguments to methods after refactor
PR Close#28382
Fixes the `ngOnDestroy` hook on a component or directive being called twice, if the type is also registered as a provider.
This PR resolves FW-1010.
PR Close#28470
Prior to this change we only checked whether current lView has a next pointer while traversing tNode tree. However in some cases this pointer can be undefined and we need to look up parents chain to find suitable next pointer. This commit adds the logic of searching for the next pointer taking parents chain into account.
PR Close#28533
`LView` `HOST` was set in most cases right after creating `LView`.
This makes the API cleaner by explicitly passing it ont `createLView`.
PR Close#28461
Currently, DOM node removal called `removeChild` on the saved parent
node when destroying a component. However, this will fail if the
component has been manually moved in the DOM. This change makes the
removal always use the node's real `parentNode` and ignore the provided
`parent`.
PR Close#28455
Previously, attempting to destroy a view with listeners more than once
throws an error during event listener cleanup. This happens because
`cleanup` field on the `TView` has already been cleared out by the time
the second destruction runs.
The `destroyed` flag on LView was previously being set in the `destroyLView` function,
but this flag was never _checked_ anywhere in the codebase. This commit
moves _setting_ this flag to the `cleanupView` function, just before
destroy hooks are called. This is necessary because the destroy hooks
can contain arbitrary user code, such as (surprise!) attempting to
destroy the view (again). We also add a check to `destroyLView` to skip
already-destroyed views. This prevents the cleanup code path from running twice.
PR Close#28413
Fixes components with native content projection (using `<content>` or `<slot>`) not working under Ivy.
The issue comes from the fact that when creating elements inside a component, we sometimes don't append the element immediately, but we leave it to projection to move it into its final destination. This ends up breaking the native projection, because the slots have to be in place from the beginning. The following changes switch to appending the element immediately when inside a component with Shadow DOM encapsulation.
This PR resolves FW-841.
PR Close#28261
Before this commit we were creating a "fake" TNode for each and every
projectable node passed during dynamic component creation. This approach
had several problems:
- the existing TView structure had to be mutated to accomodate new TNodes and
it was very easy to "corrupt" TView / TNode data structures;
- TNodes are not really needed to fully support projectable nodes so we were
creating objects and updating existing data structures for nothing.
This commit changes the approach so we don't create "fake" TNodes for projectable
nodes but instead we process projectable nodes directly in the projection instruction.
As a result we've got less code, less object allocation and - as a bonus - we fix few
bugs where TView / TNode data structures were corrupted when using projectable nodes.
PR Close#28275
Prior to this fix Ivy would not execute any animation triggers
that exist as host bindings on an element if it is removed by
the parent template.
PR Close#28162
Previously the canInsertNativeNode and getRenderParent functions had almost
_exaclty_ the same logic. What was worse that getRenderParent was calling
canInsertNativeNode thus executing the same, non-trivial logic twice.
This commit merges canInsertNativeNode and getRenderParent into one function.
Now getRenderParent will return a native parent or null if a node can't be
inserted (content projection, root of a view that is not inserted etc.).
PR Close#28011
Previously presence and type of a parent tNode was split among
canInsertNativeNode, canInsertNativeChildOfView and canInsertNativeChildOfElement.
This commit centralises the logic in canInsertNativeNode thus simplifying
the overall logic and making canInsertNativeChildOfElement trivial.
PR Close#28011
Previously the appendChild / removeChild could take null as an argument for
a child to be added / removed. This is difficult to understand since the
mentioned methods are noop if a child is null.
This commit clarifies the appendChild / removeChild signature to systematically
require a child node to be added removed. It turns out that null could be passed
only for a very specific i18n cases so now we guard a call to removeChild with
an explicit check on the i18n side.
PR Close#27987
This update introduces support for global object (window, document, body) listeners, that can be defined via host listeners on Components and Directives.
PR Close#27772
Since Renderer is shared across root and child views, we need to avoid `destroy` method invocation for child views and only invoke is for root view when needed. Prior to this change, the `destroy` function was called whenever child view was destroyed, thus causing errors at runtime.
PR Close#27592
When detaching a view by its index via `ViewContainerRef.detach(index)`, in `ViewEngine` we used to return a new `ViewRef` ([for reference](https://github.com/angular/angular/blob/master/packages/core/src/view/refs.ts#L227)), however in Ivy we return the same `ViewRef` which means that its internal `_viewContainerRef` is never reset and we'll throw an error if the consumer tried to attach it to the `ApplicationRef`. These changes return a new `ViewRef` in order to match the original behavior.
These changes also add the same errors as `ViewEngine` when attempting to attach a view that is attached already. This was the original goal of this PR, however it ended up uncovering the issues with the `ViewRef`.
PR Close#27437
