i18n instructions create text nodes dynamically and save them between bindings and the expando block in `LView`. e.g., they try to create the following order in `LView`.
```
| -- elements -- | -- bindings -- | -- dynamic i18n text -- | -- expando (dirs, injectors) -- |
```
Each time a new text node is created, it is pushed to the end of the array and the `expandoStartIndex` marker is incremented, so the section begins slightly later. This happens in `allocExpando`.
This is fine if no directives have been created yet. The end of the array will be in the "dynamic text node" section.
| -- elements -- | -- bindings -- | -- dynamic i18n text -- |
However, this approach doesn't work if dynamic text nodes are created after directives are matched (for example when the directive uses host bindings). In that case, there are already directives and injectors saved in the "expando" section. So pushing to the end of `LView` actually pushes after the expando section. What we get is this:
```
| -- elements -- | -- bindings -- | -- dynamic i18n text -- | -- expando -- | -- dynamic i18n text-- |
```
In this case, the `expandoStartIndex` shouldn't be incremented because we are not inserting anything before the expando section (it's now after the expando section). But because it is incremented in the code right now, it's now pointing to an index in the middle of the expando section.
This PR fixes that so that we only increment the `expandoStartIndex` if nothing was pushed into the expando section.
FW-978 #resolve
PR Close#28424
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
createInjector() is an Ivy-only API that should not have
been exported as part of the public API. This commit removes
the export. It will be re-exported when Ivy is released.
PR Close#28509
In Ivy, we support a new manual mode that allows for stricter control
over change detection in OnPush components. Specifically, in this mode,
events do not automatically mark OnPush views as dirty. Only changed
inputs and manual calls to `markDirty()` actually mark a view dirty.
However, this mode cannot be the default for OnPush components if we
want to be backwards compatible with View Engine. This commit re-adds
the legacy logic for OnPush components where events always mark views
dirty and makes it the default behavior.
Note: It is still TODO to add a public API for manual change detection.
PR Close#28474
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
Previously, these components were not added to the view tree for the
(fake) root view in which they were bootstrapped. Without this,
root view destruction does not work as expected since the root view's
children are not present to be also destroyed.
PR Close#28409
This commit updates test that was added after Content Queries inheritance fix (that renames some instructions) was merged into master. The test used previous version of instructions, thus causing failures after merging Content Queries inheritance fix.
PR Close#28414
Prior to this change contentQueriesRefresh functions that represent refresh logic for @ContentQuery list were not composable, which caused problems in case one Directive inherits another one and both of them contain Content Queries. Due to the fact that we used indices to reference queries in refresh function, results were placed into wrong Queries. In order to avoid that we no longer use indices to reference queries and instead maintain current content query index while iterating through them. This allows us to compose contentQueriesRefresh functions and make inheritance feature work with Content Queries.
PR Close#28324
By its nature, Ivy alters the import graph of a TS program, adding imports
where template dependencies exist. For example, if ComponentA uses PipeB
in its template, Ivy will insert an import of PipeB into the file in which
ComponentA is declared.
Any insertion of an import into a program has the potential to introduce a
cycle into the import graph. If for some reason the file in which PipeB is
declared imports the file in which ComponentA is declared (maybe it makes
use of a service or utility function that happens to be in the same file as
ComponentA) then this could create an import cycle. This turns out to
happen quite regularly in larger Angular codebases.
TypeScript and the Ivy runtime have no issues with such cycles. However,
other tools are not so accepting. In particular the Closure Compiler is
very anti-cycle.
To mitigate this problem, it's necessary to detect when the insertion of
an import would create a cycle. ngtsc can then use a different strategy,
known as "remote scoping", instead of directly writing a reference from
one component to another. Under remote scoping, a function
'setComponentScope' is called after the declaration of the component's
module, which does not require the addition of new imports.
FW-647 #resolve
PR Close#28169
Prior to this change the postprocess step relied on the order of placeholders combined in one group (e.g. [�#1�|�*1:1�]). The order is not guaranteed in case we have nested templates (since we use BFS to process templates) and some tags are represented using same placeholders. This change performs postprocessing more accurate by keeping track of currently active template and searching for matching placeholder.
PR Close#28209
Previous to this change, we were storing view queries at the
wrong index. This is because we were passing a raw index to the
store() instruction instead of an adjusted index (i.e. an
index that does not include the HEADER_OFFSET). We had an
additional issue where TView.blueprint was not backfilled
when TView.data was backfilled, so new component instances
created from the blueprint would end up having a shorter LView.
Both of these problems together led to the Material demo app
failing with Ivy. This commit fixes those discrepancies.
PR Close#28327
Prior to this change `viewQuery` functions that represent @ViewQuery list were not composable, which caused problems in case one Component/Directive inherits another one and both of them contain View Queries. Due to the fact that we used indices to reference queries, resulting query set was corrupted (child component queries were overridden by super class ones). In order to avoid that we no longer use indices assigned at compile time and instead maintain current view query index while iterating through them. This allows us to compose `viewQuery` functions and make inheritance feature work with View Queries.
PR Close#28309
- Wraps the NgOnChangesFeature in a factory such that no side effects occur in the module root
- Adds comments to ngInherit property on feature definition interface to help guide others not to make the same mistake
- Updates compiler to generate the feature properly after the change to it being a factory
- Updates appropriate tests
PR Close#28187
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
Fixes Ivy not applying properties that are set in camelCase, because it goes through the `CSSStyleDeclaration` API via `setProperty` and `removeProperty` which requires for [the values to be in dash-case](https://developer.mozilla.org/en-US/docs/Web/API/CSSStyleDeclaration/setProperty).
**Note:** I opted to let the browser normalize the value, rather than convert it to dash-case during compile time, because there are some special cases like browser-prefixed properties where we might not normalize it in-line with the browser.
This PR fixes FW-579.
PR Close#28276
Previous to this change, the isStylingContext() function was improperly
returning true for LContainers because it used the presence of an array
at index 2 to determine whether it was a styling context. Unfortunately,
LContainers also contain arrays at index 2, so this would return a false
positive. This led to other errors down the line because we would treat
nodes with containers as if they already had styling contexts (even if
they did not), so the proper initialization logic for styling contexts
was not run.
This commit fixes the isStylingContext() function to use LCONTAINER_LENGTH
as a marker rather than the presence of an array, which in turn fixes
host bindings to styles on nodes with containers.
PR Close#28221
With the refactoring or how styles/classes are implmented in Ivy,
interpolation has caused the binding code to mess up since interpolation
itself takes up its own slot in Ivy's memory management code. This patch
makes sure that interpolation works as expected with class and style
bindings.
Jira issue: FW-944
PR Close#28190
In VE the renderer.begin() and renderer.end() methods are only called
when CD is called on an element. This patch ensures that Ivy does the
same thing.
Jira issue: FW-945
PR Close#28192
There were two issues with multiple ICU expressions in the same i18n block:
- the regexp that was used to parse the text wasn't able to handle multiple ICU expressions, I've replaced it with parsing the text and searching for brackets (which is what we ended up doing in the end anyway)
- we allocate node indexes for nodes generated by the ICU expressions which increases the expando value, but we would create the nodes for those cases during the update phase. In the mean time we would create some nodes during the creation phase (comment nodes for ICU expressions, text nodes, ...) with an auto increment index. This means that any node created after an ICU expression would get the following index value, but the ICU case nodes expected to use the same index as well... There was a mismatch between the auto generated index, and the expected index which was causing problems when we needed to select those nodes for updates later on. To fix it, I've added the expected node index to the list of mutate codes that we generate, and we do not use an auto increment value anymore.
FW-905 #resolve
PR Close#28083
Up until this point, all static attribute values (things like `title` and `id`)
defined within the `host` are of a Component/Directive definition were
generated into a `def.attributes` array and then processed at runtime.
This design decision does not lend itself well to tree-shaking and is
inconsistent with other static values such as styles and classes.
This fix ensures that all static attribute values (attributes, classes,
and styles) that exist within a host definition for components and
directives are all assigned via the `elementHostAttrs` instruction.
```
// before
defineDirective({
...
attributes: ['title', 'my title']
...
})
//now
defineDirective({
...
hostBindings: function() {
if (create) {
elementHostAttrs(..., ['title', 'my-title']);
}
...
}
...
})
```
PR Close#28089
Angular allows for `<ng-content>` elements to include a selector which
filters which content-projected entries are inserted into the container
depending on whether or not the selector is matched.
With Ivy this feature has not fully worked due to the massive changes
that took place inside of Ivy's styling algorithm code (which is
responsible for assigning classes and styles to an element). This
fix ensures that content-projection can correctly identify which slot
an element should be placed into when class-based selectors are used.
PR Close#27849
When requesting a queries instance for a node, it was previously
decided whether it needs to be cloned if the node was not already marked
as hosting a query. This check is in place to have only a single queries
instance per node.
The issue with this approach is that no clone is created for subsequent
instantiations of a component, as the TNode is already marked as hosting
a query during first template pass, whereas the cloning of queries
should be independent of first template pass.
To overcome this issue, the queries are assigned an owner TNode such
that it can reliably be determined if a clone needs to be created.
PR Close#27892
This change is a prerequasity for a later change which will turn the
'di' into its own bazel package. In order to do that we have to:
- have `Injector` type be importable by Ivy. This means that we need
to create `Injector` as a pure type in `interface` folder which is
already a bazel package which Ivy can depend on.
- Remove the dependency of `class Injector` on Ivy so that it can be
compiled in isolation. We do that by using `-1` as special value for
`__NG_ELEMENT_ID__` which tells the Ivy `NodeInjector` than
`Injector` is being requested.
PR Close#28066
Previously, we had the logic to schedule a change detection tick
inside markViewDirty(). This is fine when used in markDirty(),
the user-facing API, because it should always schedule change
detection. However, this doesn't work when used in markForCheck()
because historically markForCheck() does not trigger change
detection.
To be backwards compatible, this commit moves the scheduling
logic out of markViewDirty() and into markDirty(), so
markForCheck no longer triggers a tick.
PR Close#28048
Libraries that create components dynamically using component factories,
such as `@angular/upgrade` need to pass blocks of projected content
through to the `ComponentFactory.create()` method. These blocks
are extracted from the content by matching CSS selectors defined in
`<ng-content select="..">` tags found in the component's template.
The Angular compiler collects these CSS selectors when compiling a component's
template, and exposes them via the `ComponentFactory.ngContentSelectors`
property.
This change ensures that this property is filled correctly when the
component factory is created by compiling a component with the Ivy engine.
PR Close#27867
This commit adds sanitization for `elementProperty` and `elementAttribute` instructions used in `hostBindings` function, similar to what we already have in the `template` function. Main difference is the fact that for some attributes (like "href" and "src") we can't define which SecurityContext they belong to (URL vs RESOURCE_URL) in Compiler, since information in Directive selector may not be enough to calculate it. In order to resolve the problem, Compiler injects slightly different sanitization function which detects proper Security Context at runtime.
PR Close#27939
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
`i18nAttributes` was throwing an error when it was called multiple times in the create part of the template function with the same index, for example when we create multiple components with the same template. It shouldn't throw in this case, and just use the cache when available.
FW-903 #resolve
PR Close#27911
Fixes Ivy's `QueryList` not being an instance of the exported ViewEnginer `QueryList`.
Also reworks `first`, `last` and `length` to be regular properties, rather than setters. Reworking `length` was required to be able to extend the ViewEngine `QueryList`, but I reworked `first` and `last` as well since getters generate a lot more code when transpiled to ES5.
These changes fix FW-706.
PR Close#27942
This PR assures that content projection works if an <ng-content> tag is
placed inside an <ng-template> in one component and that <ng-template>
is inserted into a different component. It fixes a bug where the
projection instruction code would walk up the insertion tree to find
selector data instead of the declaration tree.
PR Close#27783
Prior to this change, ICU extraction logic was not taking into account nested bindings (that look like this: �0:1�) and only accounted for top level bindings (like this �0�). As a result, ICUs were not parsed and remained as text in the output. Now the extraction logic (regular expressions) take into account the nested bindings format as well.
PR Close#27914
Prior to this commit, we had two different modes for change detection
execution for Ivy, depending on whether you called `bootstrap()` or
`renderComponent()`. In the former case, we would complete creation
mode for all components in the tree before beginning update mode for
any component. In the latter case, we would run creation mode and
update mode together for each component individually.
Maintaining code to support these two different execution orders was
unnecessarily complex, so this commit aligns the two bootstrapping
mechanisms to execute in the same order. Now creation mode always
runs for all components before update mode begins.
This change also simplifies our rendering logic so that we use
`LView` flags as the source of truth for rendering mode instead of
`rf` function arguments. This fixed some related bugs (e.g. calling
`ViewRef.detectChanges` synchronously after the view's creation
would create view nodes twice, view queries would execute twice, etc).
PR Close#27744
We invoked `hostBindings` function in Create and Update modes with different element index due to the fact that we did not subtract HEADER_OFFSET from the index before passing it to `hostBindings` function in Create mode. Now we subtract HEADER_OFFSET value before invoking `hostBindings`, which makes Ceate and Update calls consistent.
PR Close#27694
Context discovery was only available on elements. This PR adds support for containers and ICU expressions.
FW-378 #resolve
FW-665 #comment linker integration tests
PR Close#27644
`NgModule` requires that `Component`s/`Directive`s/`Pipe`s are listed in
declarations, and that each `Component`s/`Directive`s/`Pipe` is declared
in exactly one `NgModule`. This change adds runtime checks to ensure
that these sementics are true at runtime.
There will need to be seperate set of checks for the AoT path of the
codebase to verify that same set of semantics hold. Due to current
design there does not seem to be an easy way to share the two checks
because JIT deal with references where as AoT deals with AST nodes.
PR Close#27604
Prior to this change, we were unable to match directives using `ng-template` tags (for example the following selector would not work even though there might be some <ng-template>s in a template: `ng-template[directiveA]`. As a result, that broke some components that relies on such selectors to work. In order to resolve the problem, we now pass tag name to the `template` instruction (where we passed `null` before) and this tag name is used for matching at runtime. This update should also help support projecting containers, because the tag name is required to properly match such elements.
PR Close#27636
In Ivy, a pure call to `setClassMetadata` is inserted to retain the
information that would otherwise be lost while eliding the Angular
decorators. In the past, the Angular constructor decorators were
wrapped inside of an anonymous function which was only evaluated once
`ReflectionCapabilities` was requested for such metadata. This approach
prevents forward references from inside the constructor parameter
decorators from being evaluated before they are available.
In the `setClassMetadata` call, the constructor parameters were not wrapped
within an anonymous function, such that forward references were evaluated
too early, causing runtime errors.
This commit changes the `setClassMetadata` call to pass the constructor
parameter decorators inside of an anonymous function again, such that
forward references are not resolved until requested by
`ReflectionCapabilities`, therefore avoiding the early reads of forward refs.
PR Close#27561
Currently the `ViewRef.destroy` method assumes that its index inside the view container will always be valid, however if it has been removed already, it'll be -1 which will throw an error.
The error manifested itself in one of the unit tests where a view had been detached during the test and then `TestBed` attempted to destroy its `ComponentRef` which ended threw an `Error during cleanup of component`.
PR Close#27585
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
Previously in Ivy, host bindings did not work if they shared a public name
with an Input because they used the `elementProperty` instruction as is.
This instruction was originally built for inside component templates, so it
would either set a directive input OR a native property. This is the
correct behavior for inside a template, but for host bindings, we always
want the native properties to be set regardless of the presence of an Input.
This change adds an extra argument to `elementProperty` so we can tell it to
ignore directive inputs and only set native properties (if it is in the
context of a host binding).
PR Close#27589
In `ViewRef.detectChanges`, we are passing `ViewRef.context` into `detectChanges` to trigger change detection. This only makes sense for component `ViewRefs` (i.e. injected `ChangeDetectorRefs`) because with embedded views, `context` is not a component instance where the view has been monkey-patched. It's a just a normal object, so the view will be undefined.
In order to resolve this problem, we now invoke `detectChangesInternal` and also pass `LView` (to make sure we always have a view available).
PR Close#27521
Prior to this change, animation properties were defined as element attributes, which caused errors at runtime. Now all animation-related attributes are defined as element properties.
Also as a part of this update, we start to account for bindings used in animations, which was previously missing.
PR Close#27496
Prior to this change, the number of host vars stored for directives with `hostBindings` in expando block was incorrect for inherited directives (in case both parent and child directive have `hostBindings` defined). Now if we identify that we already added a `hostBinding` into expando block, we just increase the corresponding number of host binding vars
PR Close#27392
In Angular, it used to be an accepted practice to use strings as dependency
injection tokens. E.g. {provide: 'test', useValue: 'provided'}. However,
the Ivy node injection system did not support this. The Ivy DI system
attempts to patch a Bloom bit index onto each type registered with it, and
this patch operation does not work for a string token.
This commit adds string token support to the bloom filter system by
reserving bit 0 for string tokens. This eliminates the need for each string
token to store its own Bloom bit, at the expense of slightly more expensive
lookups of string tokens.
PR Close#27383
BREAKING CHANGE:
The public API for `DebugNode` was accidentally too broad. This change removes
1. Public constructor. Since `DebugNode` is a way for Angular to communicate information
on to the developer there is no reason why the developer should ever need to
Instantiate the `DebugNode`
2. We are also removing `removeChild`, `addChild`, `insertBefore`, and `insertChildAfter`.
All of these methods are used by Angular to constructor the correct `DebugNode` tree.
There is no reason why the developer should ever be constructing a `DebugNode` tree
And these methods should have never been made public.
3. All properties have been change to `readonly` since `DebugNode` is used by Angular
to communicate to developer and there is no reason why these APIs should be writable.
While technically breaking change we don’t expect anyone to be effected by this change.
PR Close#27223
Olivier Combe
Jeremy Elbourn
Kara Erickson
onlyflix
Andrew Kushnir
Alex Rickabaugh
Marc Laval
Miško Hevery
Kristiyan Kostadinov
Ben Lesh
Pawel Kozlowski
Matias Niemelä
JoostK
Pete Bacon Darwin
Alex Eagle
George Kalpakas
Igor Minar